BRAND MODEL CHASSIS KEYWORD SYMPTOM CURE
RCA PS27600 CTC197 All snow Unit has no tuning of any channel from the main tuner. When monitoring the tuning voltages at U17501(5,6,7,& 8) were all running at 30 volts no matter what channel the TV was on. Inspecting all the tuning voltage paths from the PLL chip U17501 found that the path that Pin 5 supplied had a 52K resistance to ground. On the other side of R17508, a 47K resistor we found the resistance path to ground was 4.2K. Capacitor C17713 was leaky.  PN# 192020.
PSN PS32109 CTC197 Arcing PS32109 serial # 738560420J Unit will not turn on but there is an arcing in the neck of the tube. Unit has a defective CRT. We will need a RCA approval from Thomson for this unit. Tube serial #D-YAGA8516 Code date 97-28, CRT # A80AEJ16X09  VLS # TG9194-AF
Proscan PS36500 CTC197 Arcing    (Snivits)  36 " ctc197 that has a weird symptom. First of all, its intermittent. second its not affected by freeze or heat. symptom is picture starts to get horizontal tearing and break up and 1" vertical band of snow band on the left side. It will get worse and eventually take over picture and the flyback and yoke starts making a sizzling type noise and then all of a sudden it just stops. Also does it in aux input mode. The interference was picked up not only by other tvs in the shop but also by radios.  NOTE: I started working on this in customers home and found that the ground pin for the focus/screen controls was completely open, I soldered it back but at the time didn't give it allot of thought. GREAT NEWS. EUREKA !!!! 237506 flyback was cause. I just bet this was the cause of this rare problem
GE 46GW945 CTC195 AUDIO 46GW945 serial 850241017 Unit has no audio.  Tech needs to inspect the audio output circuit around the audio output IC. U11901. The items necessary to check is U11901(5 & 3) Pin 5 is the mute switch and it should be 26 volts and 3 is the B+ and should be 31. After closer inspection there was major evidence of rodent infestation. The circuit board was still wet from large amounts of urine and feces covering the area around the audio output. This is not covered by any warranty. The board has sever corrosion around this entire area. Board is not available from vendor. Refer customer to there home owners insurance to see if they will cover this unit as because it is a total loss.
GE 45GW945 CTC195 AUDIO 46GW945 Unit has a poor audio  in the tuner mode. External audio from a VCR is perfectly normal. Checking audio at the Wide band output of U16201(6) was approx 300 millivolts. We also had the same at U11600(17).  Following the Main audio to the output of U11600(12) finds no audio. Further checking finds capacitor C11630 a 4.7 mfd@ 35vdc was open.
GE 45GW945 CTC195 AUDIO 46GW945 Unit has a poor audio in the tuner mode. External audio from a VCR is perfectly normal. Suggested to the tech to connect the customers VCR in to the AUX input and try it there for a few days and see if the symptom shows up there. Also some history of failures have shown that 3 capacitors, if intermittently open will cause the same symptom. I Suggested to the tech to check into to possibility that a problem exists in the stereo decoder. The 3 coupling capacitors C11630, C11628, C11631 may need to be checked or replaced. Also U11600 the audio processor could be at fault. Actual problem was C11630 open 4.7 mfd @ 35 vdc
GE 46GW945 CTC195 AUDIO 46GW945 Unit has in intermittent audio.  Speakers plug into a small board mounted between the CRT lenses. The connector for the Speaker had insufficient solder around the perimeter of the pins on this board. Resoldered connection and the problem was solved
GE 52GW945 CTC195 AUDIO 52GW945 serial 9013151114 Unit will run for days then loose audio. Video is OK as well as all the functions. Removing and Reapplying power restores audio This trouble is caused by a defective data packet broadcast from a  local TV station. The data packet is located in the VBI (Vertical Retrace Interval). It's purpose is for XDS (Extended Data Services) that is used by the GemStar circuitry. The condition is very intermittent and not much is known to the average TV technician because Thomson is not releasing much information to the public other than removing the power and reapplying it again. Thomson's answer to this issue is taking their case to the FCC and let them resolve the conflict between FCC and the broadcasters. This phenomena only effects certain Thomson  chassis CTC197, CTC195 and CTC203. Only a specific run of serial numbers are also effected. As of this date 7-12-2001 there is no cure offered by Thomson.
RCA P52750 CTC195 AUDIO P52750  No audio.  Old audio output IC is blown apart.  Looks like the chip suffered a sever over voltage condition from the Speaker side of the set. I.E. someone hooking up a big external amp to the Output of the internal amp in the television in the hop It was discovered the customer was using the television to drive Large Kenwood speakers. The speakers by themselves are not a problem but the customer left the big 150 watt Kenwood amp connected to the same speakers. After some heavy driving of the speakers with the Kenwood Amp the RCA TV lost audio. Unit had defective audio output IC.
RCA P52820 CTC195 AUDIO P52820 serial 725490159 Unit has no audio in the tuner mode. Audio OK in the external input mode Possibility exists that the trouble is in the stereo decoder. Since audio is OK using the external inputs, it suggests the output buffers in I11600 are OK. Wide band audio is supposed to be present at U11600(17). If composite audio is OK then trace it though. Unit had a defective U11600 part # 239930
RCA PS46820 CTC195 AUDIO PS46820BL serial 725591904. CTC195DA.. Weak audio on all channels.  I had tech connect the VCR to the external line inputs and see if it still had weak audio. Audio was normal using the aux inputs. Also checking on the screen with known SAP and Stereo stations the set would never indicate that it was receiving stereo by the OSD message. This indicates that the composite audio may be too low. Since the set was working before, and no one was tampering with adjustments it was ruled out this malfunction was caused by
PSN PS50700 CTC195 AUDIO PS50700 serial 837451089. Cust claims the audio fluctuates intermittently  Suggested to the tech to connect the customers VCR in to the AUX input and try it there for a few days and see if the symptom shows up there. Also some history of failures have shown that 3 capacitors, if intermittently open will cause the same symptom. I Suggested to the tech to check into to possibility that a problem exists in the stereo decoder. The 3 coupling capacitors C11630, C11628, C11631 may need to be checked or replaced. Also U11600 the audio processor could be at fault. 
RCA PS50700 CTC195 AUDIO PS50700 serial 851751230 Tuner audio very weak an not very clear. Backgrounds seem as high as the primary foreground audio. However the sound is not distorted. When selecting the Forced mono mode there is no audio at all. When running a VCR using the channel 3 input the audio is almost non existent C11630 was 4.7 mfd.  Asked tech to try the set using the external audio in the external input jacks. The audio is fine using the external input jacks. Possibility exists that the trouble is in the stereo decoder. Since audio is OK using the external inputs, it suggests the output buffers in I11600 are OK. Wide band audio is supposed to be present at U11600(17). If composite audio is OK then trace it though.
GE 46GW945 CTC195 AUDIO Unit has weak noisy audio. From DVD player. Audio is fine from the DVD player using the external input mode. NOTE: It should be noted the customer has no other VHF or UHF R.F sources because of the rural location. However our NTSC signal generator when fed into the RF input on channel 3 the audio was noticeably lower and noisier. Unit only has 40 millivolts of Wide band audio measured at U16201(6) where it should be close to 300 mv. Further checking the 4.5 mhz carrier is low measured at U16201(1). This television had a surface mounted capacitor C12304 which appeared to have too much glue on it. The glue covered both ends of the capacitor. Removing the capacitor and chipping away the glue and re installing it corrected the trouble.
RCA PS27600 CTC197 AUDIO Channel 2 has an audio buzz only when superimposing lettering on the screen. Suggest the tech try to lower the video detector level by using the Chipper Checker. This setting has a nominal setting of 6. By setting the level anywhere from 4 to 6 this Peak white noise buzz will disappear from the sound.
PSN PS32500 CTC197 AUDIO Customer uses product in the video input mode with no audio attached. The customer claims there is a cyclitic pumping or popping in the audio that is low level at a 1 hz rate. The symptom is intermittent, but when it starts up the symptom will last for hours. The television is used in a recording studio and can sometimes be picked up by the microphones used in the studio I gave tech the schematic of the audio decoder and the SRS processor. It is assumed the trouble is not in the MTS decoder since the circuitry is not being used with this configuration. It is felt the trouble may lie in the SRS circuitry. This is where the  lie level audio is processed for surround. The trouble was in U11501.
RCA F36665 CTC197 AUDIO F36665 serial 904431237  Unit has no audio. Return only if power is removed and applied again This is effecting many televisions that fall into this serial number. It is caused by a defective data packet transmitted in the XDS portion of the Vertical blanking interval. This is causing a "Stack overflow" error in the television's microprocessor. There is no cure for this at this time. According to Thomson Tech support, a company called Everett's built a VBI inserter that has apparently been responsible for sending out two extra bits of data. Instead of a 128 bit word a 130 bit word is sent out causing the Thomson televisions built from late 1997 thru the beginning of 1999. It is reported the trouble is to be fixed by late 2002.
RCA PS27117 CTC197 AUDIO PS27117 serial # 737512175 Sound tends to increase by itself. Had to turn volume down The audio controller IC U11600 was at fault.
RCA PS32600 CTC197 AUDIO PS32600 serial 837731107 ,Unity has 60 cycle him in audio when using the enhanced audio functions. When running normal processed audio without the Dolby surround the audio is fine. The needs to look at the input and output of IC11501. Inputs U11501(1 &22) Outputs U11501(9 & 14) This is the compressor IC that handles the A to D and D to A conversion of audio in the enhanced audio modes. If the hum is detectable at the outputs and not at the inputs then this IC or circuit should be troubleshot.
RCA PS36109 CTC197 AUDIO PS36109 At the instant the set is turned on the Audio has a loud distinct "POP" that can be heard from both speakers. After the initial POP during power up the set will play fine with clear undistorted audio. Tech replace the audio output IC with no change in the POP. I asked tech to try an turn off the speakers in the customer menu. After the speakers were turned off the set still had audio through the speakers Q11900 is the speaker mute switch that is attached to U11901(5 Control IC audio output and Mute Q11901(5) . The voltage at this point should rise to 30 volts for a mute condition. It was always running 11 volts no matter if we had the speakers turned on or off. Checking the condition of Q11900 we found a Collector/Base short. Q11900 =215495
RCA PS36500 CTC197 AUDIO PS36500 Serial 834531198 Unit has no audio in the second audio input. Only will have audio if the front jacks are used. The confusing part of this is there is no mention of the operation of the front jacks in the customer user's guide. Secondly the video in works on both front and rear input(2) without change the source in the customers menu. Audio never chances. Audio is selected by changing the input state of U27702(10 & 9) these are a binary input from the micro U13101 (43 & 44). These binary outputs are changed by pressing the "input" button on the remote where it will cycle though the different options where the front can be deselected and the rear selected.
PSN PS36605 CTC197 AUDIO PS36605 Unit has intermittent audio level using the tuner or external inputs. Audio outputs and SRS module have been changed without effecting the symptom Try U11600
RCA PS36700 CTC197 AUDIO PS36700. Unit has intermittent audio level that varies from minimum to a higher level. This symptom is intermittent. Tech replaced the audio output IC and the trouble still was present. After talking to customer I discovered the symptom clears up if the customer uses the "forced mono mode". When the mono mode is selected the audio is fine and normal level.  Suggest the tech check into to possibility that a problem exists in the stereo decoder and not in the audio control system. Coupling capacitors C11630, C11628, C11631 may need to be checked or replaced. Also U11600 the audio processor 
RCA PS27117 CTC197 AUDIO Sound tends to increase by itself. Had to turn volume down. The audio controller IC could be at fault. Replace U11600.PN# 237930
RCA PS32600 CTC197 AUDIO Unit has 60 cycle hum in audio when using the enhanced audio functions. When running normal processed audio without the Dolby surround the audio is fine. The tech needs to look at the input and output of IC11501. Inputs U11501(1 &22) Outputs U11501(9 & 14) This is the compressor IC that handles the A to D and D to A conversion of audio in the enhanced audio modes. If the hum is detectable at the outputs and not at the inputs then this IC or circuit should be troubleshot.
RCA F36665 CTC197 AUDIO Unit has audio drops out. Audio will only return if the power is removed and reapplied. Unit will run for hours or weeks then will drop out again This is effecting many televisions that fall into this serial number. It is caused by a defective data packet transmitted in the XDS portion of the Vertical blanking interval. This is causing a "Stack overflow" error in the television's microprocessor. There is no cure for this at this time. According to Thomson Tech support, a company called Everett's built a VBI inserter that has apparently been responsible for sending out two extra bits of data. Instead of a 128 bit word a 130 bit word is sent out causing the Thomson televisions built from late 1997 thru the beginning of 1999. It is reported the trouble is to be fixed by late 2002/  
RCA F36665 CTC197 AUDIO Unit has intermittent audio.  Nothing on record for intermittent audio with the exception of software errors in the EPROM.
PSN PS36500 CTC197 AUDIO Unit has intermittent fluctuation in audio especially when using the Surround Pro Logic mode. This only occurs in the tuner mode not external input. Since audio is OK using the external inputs, it suggests the output buffers in I11600 are OK. Wide band audio is supposed to be present at U11600(17). If composite audio is OK then trace it though. Unit had a defective U11600 part # 239930
PSN PS36500 CTC197 AUDIO Unit has intermittent fluctuation in audio especially when using the Surround Pro Logic mode. This only occurs in the tuner mode not external input. Since it only happens in the tuner mode the tech need to see if this set is actually receiving and decoding stereo. Using a scope and setting it up to see a lissajue pattern we found that no stereo was being decoded. Only when volume increased did any phase shift in the Left and right channel occur. Checking the MTS decoder U11600(23 &24) the L-R signal we find approximately 270 milivolts on pin 23 but pin 24 only has 5 mv. Replaced C11628 corrected the no stereo. 
RCA PS27600 CTC197 audio buzz PS27600 serial 849431298 Channel 2 as and audio buzz only when superimposing lettering on the screen Suggest the tech try to lower the video detector level by using the Chipper Checker. This setting has a nominal setting of 6. By setting the lever anywhere from 4 to 6 this Peak white noise buzz will disappear from the sound
RCA P60924 CTC195 Audio missing Unit has intermittent no audio in the tuner mode. Cpm[posite audio is stroing I=at U11600(17). NO L+ R or L- R at U11600(13 & 23) Data and clock are fine as with the B+. Line audio in is OK. Checking voltages around IC11600 the tech found that pins 16 was zero volts. It was discovered that C11637 a 1mfd@16 volt (smd) was shorted. Part # 219452 cured the trouble.
RCA PS50670 CTC195 auto program PS50670 8054811305 CTC195C. Unit will not auto program. Also when auto programming the set will not autoprogram beyond channel 52. When direct accessing the channel the set takes about 1 to 2 seconds for the picture to appear.  This delay in direct accessing the channel is too high. It should be about 2000 milli seconds. Tech needs to initialize the Eeprom. This did not correct the symptom. Next the tech needs o enter the alignment parameters of the IF and see that the VCO parameter is 98 and the AFC OFFSET is 24. Next is to exit out of the service mode and disconnect the Chipper Checker. Turn on the set without an antenna connected and select a low band VHF channel from 2 ~ 6 and wait for 10 seconds. Then connect the antenna or CATV back to the television. (The 10 second wait,before commecting signal source) is so the television will give up trying to tune the tuner to search fo an active channel. It will stop trying in that 10 second period of time. Next monitor the Voltage at U16201(12) It must be 3.8 volts. If not, adjust L12302 for 3.8 volts. The coil will have two spots where 3.8 volts can be acheived. Pick th point where the ferite core is closest to the board.  If the voltage jumps up and down radically replace L12302 part# 215502.
RCA F36690 CTC197 auto program F36690 serial 834331492D Unit take s too long to change channels Will not autoprogram.  But it will manually program and store all the channels in the memory. Tech needs to initialize the EPROM with the chipper checker and create a file for the product. It may require the alignment of the IF VCO or IF APC. Each one will cause the set to be sluggish and Cause the set to not auto program 100% of the time.
RCA PS27500 CTC197 AUTO PROGRAM PS27500 serial 849411519 . Tuner skips several channels when using the auto program feature. Unit had a broken trace at C509
RCA PS36700 CTC197 AUTO PROGRAM PS36700 Serial 839231828 . Unit has two symptoms. 1. If the channels are direct accessed the set will take 15 seconds to before the picture would show up. 2. When the volume, brightness, contrast, etc… is adjusted the set will take too long for the execution of the function. The bar graph will take 1o to 15 seconds to execute the next level up.  The T4 chip VCO is not running at the correct frequency. When measuring the U16201(12) we found the voltage too high (7+ volts)`. When the set is placed on a active channel, and the voltage is checked on this pin it was over 6.8 volts. Using the chipper checker we were not able to reduce this voltage lower than 4.9 volts. It must be 3.8 volts + or - 0.8 volts. It is suggested the VCO coil be replaced (L12302) part number 215502
PSN PS56670 CTC195 autoprogram missing PS56670 ser 726690229 Unit had the symptom of slow AFT recovery. Will not auto program. When channels are accessed the set will take 2 seconds to capture the signal. Tech needs to check the video IF VCO. The procedure to set this is to Place the television on an active channel in the area. Turn off the set, disconnect the antenna, turn it back on again and wait for 10 seconds, then measure U16201(12) it must be 3.8 volts. 
RCA PS36700 CTC197 BAR ON SCREEN PS36700 Serial 839731774 Unit operates fine intermittently but the lower portion of the screen has a 50 IRE bar that matched exactly the size of the PIP box. When the PIP box is invoked and moved up the screen the 50 IRE bar moves with it. Because of the thorough description of this symptom it appears the trouble must be in the FPIP IC U18100. This IC is used for the PIP and comb filter for both main and pip video.
PSN PS36605 CTC197 BLUE SCREEN PS36605 serial 844432788 Unit has a blue screen. Cannot achieve cut-off  with G2. When tapping on the neck of the tube the blue screen returns to normal but will turn blue again in a few seconds. Tech will need a replacement CRT A90AEJ16X09. CRT approved by TCE tech line.
RCA F36680 CTC197 CHANNEL CHANGE INOPERATIVE F36680 serial 831331772X Unit will not change channels. The display changes but the internal tuner will not. Seems to be stuck on channel 9. Tech needs to deselect all entries in the TV guide plus menu relating to the questions; Do you have a CATV BOX? Do you have a VCR? Do you have DSS?. Select "NO" to these items. It will give the tuner control functions back. If any of the items are selected "YES" then the customer will need a device that came with the set called a IR Blaster. It plugs into the rear of the set in the "G-LINK" connector. It enables the TV to "Talk" the VCR or CATV box Through the IR G-LINK. It will control them if the user wants to have the TV Guide plus put the VCR into record (timer type recording) or when the TV downloads the TV Guide plus data, It must search for a Host Television station that transmits the TV-GUIDE PLUS data. The TV change the channels on the CATV BOX rather than the TV if the only input to the set is a CATV BOX.
PSN PS36700 CTC197 CHANNEL CHANGE INOPERATIVE Unit has no tuning of VHF channel even though the channel display is changing. Checking the band switching at Q17503 Q17504, & Q17505 finds that everything  is OK in those areas for low and high band VHF and UHF switching are OK. When monitoring the tuning voltages generated from the Quad OP amps in U17501(5,6,7,& 8) we found that pin 5 was the lowest voltage of all of the other pins. These is the tuning voltages for all the vaircaps in the tuner area. Pin 5 it the tuning voltage for the Local oscillator. It never went higher than 1 volt no mater what channel was selected. Checking the resistance to ground on pin 5 we found it to be less than 1k it should be in the 20 megs +. Removing C17508 removed the load on that line and corrected d the fault. Capacitor PN is 197600 1000 @ 50 vdc SMD.
RCA F27615 CTC197 Chipper Checker F27615 Serial # 934637754 Unit operates fine but it does not show the usage display in the menu provided in the chipper checker dialogue box. All sets were tried out with the newest version of Chipper Checker. After loading the new version of the software Chipper Checker II ver 1.61, It was discovered the screen size in the selected in the computers display was set to 800X600 instead of 640X48
GE 46GW945 CTC195 color missing TV has no color in the tuner or video input mode. Further observation finds the OSD is also in Black & White. Nothing but gray shades. Researching the history of this television it was discovered the Blue CRT leaked and the CRT module was  also changed. Who ever changed the module did not remove any jumpers on the blue CRT module. All these CRT driver boards are exactly alike with the with the exception of the removal of 2 out of 3 jumpers JW152256, JW152257, JW152258. Specifically cutting  2 of these jumpers allows these modules control red green or blue CRTs.
RCA PS50670 CTC195 colored shadows PS50670 serial 73590920. intermittent has a yellow shadow to the left side of any white character.  I had the tech to produce an all white image on the screen and see if this is a problem in the optical path or if it is a problem in the video circuits. It does appear if the signal is a black and white image. If the OSD menu is brought up. This will eliminated the Digital comb filter and the F2PIP processor. It is felt that the problem is either CRT related or optical path. Futher inspection of the optical path discovered a large spider web across blue CRT was causing the problem.
GE 46GW945 CTC195 CONVERGENCE 46GW945 serial 814244063, Unit has no convergence correction. No convergence menu in the set up adjustments Unit has a Digicon module failure. The digicon module has B+ to it's EEPROM U19500(8). All data and Clock signals are normal at U19501(20&21). However there is no vertical timing pulse at U19501(55). This pin is named SYNV. Further checking finds Q19503(C) was never soldered. Soldering the device corrected the symptom.
GE 46GW945 CTC195 CONVERGENCE Chassis PKK195AA. Unit has a single thin 6 inch long horizontal green line in the lower left hand corner of the screen. When feeding a 100 IRE signal to the set, the line is very evident. But when the convergence yokes are disconnected the line disappears. In fact it returns when only the green is connected.  The problem was a localized problem to the green convergence geometry circuitry. Tech used freeze mist and heat to isolate the trouble. Tech finally found Q19325, the gv input transistor to be thermal sensitive. Tech could heat the transistor and the line would slowly disappear. Tech did not have this transistor in stock. So it was swapped with its red counterpart and the distortion was red. The part has corrected the trouble. PN# 239193
RCA P52920 CTC195 CONVERGENCE P52920 serial 8333514026 CTC195KB Unit does not have convergence control for both dimensions for all three colors.  Tech did not try to get into the customer menu to see if it was possible to adjust the error. (NOTE: Presence of the option would indicate that we have communication between the Digicon board and the main system control CPU). Also tech did not feel the heat sinks of the Digicon or power supply to insure that these circuits are getting B+ or not. Tech requesting the digicon module for this unit. I'm sending him one out of our write-off area. This is only to test. Tech could not get unit operational. 
RCA P52920 CTC195 CONVERGENCE P52920 Unit has convergence way out of adjustment. When trying to gain access to the tech menu the "Convergence" portion of the menu is missing from the feature list. I had tech feel the heatsinks on the PTV AUX board. These heatsinks were cold. They should have been warm. I had tech listen for any noises that the PTV AUX board might be making. Tech claimed there is a slight noise from the supply. I then had the tech check all the diodes on the PTV board and found them in normal condition. Next I had tech check the Value of R19722 & R19703, these must be 750K each.
PSN PS50700 CTC195 CONVERGENCE PS50700 serial 905551256 Unit has no convergence correction. When accessing the customers setup menu the convergence settings are missing from the menu. Asked the tech to let the set play for about 10 minutes. After 10 minutes I had the tech feel the hat sinks of the PTV AUX board. It was quickly discovered the heat sinks were cold. Static checking of the all the secondary diodes in the PTV AUX power supply find a shorted CR19710. Replacing the device corrected the problem 164590.
PSN PS56670 CTC195 CONVERGENCE PS56670 serial 734590185 Unit has no convergence correction at all. When Bringing up the menu the set has no sync for the OSD menu. It rolls vertically. In fact all OSD menus roll uncontrollably.  Tech need to look at the presence of Vertical sync input to the Digicon, and the Main microprocessor U13101(34). There should be a 5 volt peak to peak signal going to both boards. 
PSN PS57670 CTC195 CONVERGENCE PS57670 serial 737690908 Television has no convergence correction. All color and dimensions are effected. When the customer convergence is accessed it is mysteriously missing. Also when accessing the dynamic convergence menu in the tech menu screen 80, it too is missing.  The needs to verify the Digicon has B+ to the EPROM U19201(8) However there is no data on pins 5 and 6 on the EPROM during the first 10 seconds after power up. There is communications on the I2C bus from the Main CPU to the Digicon IC(20 & 21). All B+s appear normal to all the pins of the Digicon processor. Horizontal pulses are present at pin 22, but there are no vertical pulses at Pin 55. Closer inspection has Q19504.
GE 46GW946 CTC195 CONVERGENCE No convergence correction. No OSD. Has sound and normal picture. All power supplied for the convergence Digicon board are present. I chose to attack the common signal to both circuits. The Digicon, and the OSD circuitry must have two primary signals to operate. These are horizontal, and vertical timing pulses. U13101(35) must have 5 volt pp  pulses at the horizontal rate, This was normal. U13101(34) had noise. No vertical pulses at 5 volts pp. Measuring the source of the pulses U14501(3) was slightly over 28 volts pp at the vertical but was lost after passing through Q14502, & Q14503. Q502 was leaky PN# 215496.
PSN PS50700 CTC195 CONVERGENCE Unit has no convergence correction at all. Convergence Power supply is not running. However when the Convergence yokes are unplugged and the set turned on again the convergence power supply will run. While the set was running the voltages were checked on vacant pins of the convergence output yoke connectors pins (1&2) (3&4) of connectors P19301, P19302, & P19030. Each set of pin should have less than 5 volts on them. When checking the Blue we found the voltage at P19303(1&2) was in excess of 31 volts. Reconnecting the Red and Green convergence yokes we found those colors converged perfectly. Checking the condition of the resistors in the Blue vertical correction circuit we found a resistor R19352, a 91K 1/2 watt resistor had increased in value to 184K. Replacing this resistor corrected the symptom.
RCA F32635 CTC197 CRT F32635S On bright white areas of the screen the screen temperature will change slightly and slowly return to normal This is known as doming and is normal on most all picture tubes. It is caused By the expansion coefficient effect of the shadow mask inside the tube. As the bright beam passes through the holes in the shadow Mask the shadow mask heats up in that geographic area of the mask. Since that area is hotter than the surrounding area it expands more the cooler surrounding area. This causes a doming or a blistering effect of the mask causing the "Q" distance to change. The "Q" distance is the optimum distance between the surface of the shadow mask and the phosphor dot on the CRT face.
RCA F36673 CTC197 CRT F36673ET serial 805360765  Unit has a blurry picture and arcing in the neck of the tube. Unable to check the Voltages at on the socket with tube disconnected due to sporadic arcing from the pins of the CRT A90AEJ15X01 unit has blurry focus and arcing in the neck of CRT
PSN PS32109 CTC197 CRT Unit will not turn on but there is an arcing in the neck of the CRT Unit has a defective CRT. We will need a RCA approval from Thomson for this unit. Tube serial #D-YAGA8516 Code date 97-28, CRT # A80AEJ16X09 VLS # TG9194-AF
GE 46GW945 CTC195 CRT Leakage 46GW945 CTC195AA Serial 852241083. Unit caught on fire inside near the pincushion circuit. Caused buy the blue CRT expansion chamber ruptured Unit will need a replacement Main board and Blue CRT. VLS number is ……………… The information was forwarded 
RCA 46GW945 CTC195 CRT Leakage Blue CRT leaked on the Main CBA of the chassis OK to IFS this unit due to the fact the board needs to be cleaned with hot water and dried with compressed air.Quickly drying the board is critical to keep any oxicidation from forming. Replacement of the CRT and the successful cleaning and drying of the CBA corrected the problem
RCA P52820 CTC195 CRT Leakage P52820BL serial 729290935 Unit has coolant leak from the red tube.  It has damaged the Convergence module, RED and Green CRT Driver modules are also covered with coolant. In addition to the red tube the blue tube has a spot burn in the center of the phosphorus.
RCA P46712 CTC195 CRT  P46712BL serial 749490619 Unit has after glow and pre glow on the green CRT only Asked tech to swap the Red and green or blue and green sockets to see if the symptom transfers of stays the same.
GE 52GW947 CTC195 Dead 52GW547 serial 936442026 Unit will not turn on. Tech measured the voltage at the Q14401(C ) and found that it was always at 170 vdc. I asked the tech to check the voltage ate the collector of Q14301(C ). As soon as the voltage measurement was attempted the set began to run again. Closer inspection the tech found very tiny ring fractures around the Q14301 and T14301. Resoldering these ring fractures corrected the symptom.
RCA P52920 CTC195 DEAD P52920 serial 841513337 Unit is dead. Will not turn on.  Measuring U14101(3) we found nearly "0" volts. U14101(6) was at 9 volts and pulsing from 9 to 6 volts. This power supply has an open R14145 a 100K 1/2 watt resistor.
RCA P52920 CTC195 dead P52920BL Unit will not turn on. No secondary voltages from the main switch mode power supply.  I had tech measure the B+ at Q14101(C) which was 165 vdc. Then measure I14101(3) this should be 3 volts but it was "0" volts. Measures the value of R14145 is was open. Tech replaced resistor and normal operation was restored.
RCA PS46820 CTC195 Dead PS46820BL Unit will not turn on.  All secondary are running normally. CR14106(K) =165 volts in standby, CR14107(K) =16 volts Cutting JW12410 located next the  Microprocessor shield fence, did not turn on U14701. This action is supposed to turn on that device. U14701 is defective
PSN PS56700 CTC195 Dead PS56700 Acts dead. There is no turn on when the power button is pushed. Using the chipper checker finds the set  I had tech check the presence of the data and clock at the instant that power was applied. The tech needs to check the Stand by bus on U13102(5 &6). There was 200 Ms of data present. Next th tech needs to check the Keyboard input to the CUP U13101(6, 7, & 8) Must have 5 volts on all pins. U13101(5) will only have 2.5 volts on the pin. We were missing the voltage on U13101(6) It was held to "0". I asked the tech to remove the Keyboard and measure the voltage again on pin 6. It rose to 5 volts with the keyboard disconnected. Suggest the tech remove the keyboard and see if there is a pinched wire on the cable or contaminate on the switch or ribbon. Possible switches involved are the power or channel up ( SW13412, or SW13410). The trouble was caused by a contaminante on the ribbon cable. It was silicone sealant. The sealant was shorting out a portion of the cable causing the trouble. Cleaning the silicone off corrected the problem
RCA PS61700 CTC195 DEAD Unit has a symptom of DEAD. R12709 is cracked into two pieces. Unit must have a defective flyback transformer. This resistor is the ABL feed back loop and must have opened because of a catastrophic increase in ABL feedback voltage from the flyback. Tech needs to replace the flyback but also needs to inspect the B+ from the stand by supply. This was not done by the tech on the initial visit.
RCA PS51700 CTC195 DEAD Original problem was Dead. Tech replaced U14101, Q14101 and F14101 because they were defective. But immediately after power was applied these components blew out again, instantly. Replacing all of the components again and putting a variable AC supply on the TV we found the B+ would shoot over 180 vdc measured at CR14106(K). This indicated the feedback from the secondary winding of the power supply was not controlling the  error a
RCA 46GW947 CTC195 dead Unit is dead with no stand by or run power supply. Found an open R14145 a 270 ohm resistor. Replacing it did not get supply running again. Tech replaced U14101 and Q14101 with similar results.  Statically checking components in the area around U14101(6) finds the resistance at 44 ohms. Isolating pin 5 did not change readings enough. But removing C14127 a 35mfd@35 volts corrected the  low resistance condition to ground, but the power supply still did not run. Replacing U14101 again corrected the dead power supply U14101 pn # 237476
RCA 46GW947 CTC195 dead Unit is dead with no stand by or run power supply. Found an open R14145 a 270 ohm resistor. Replacing it did not get supply running again. Tech replaced U14101 and Q14101 with similar results.  Statically checking components in the area around U14101(6) finds the resistance at 44 ohms. Isolating pin 5 did not change readings enough. But removing C14127 a 35mfd@35 volts corrected the low resistance condition to ground, but the power supply still did not run. Replacing U14101 again corrected the dead power supply. Apparently the shorted capacitor caused the U14101 to self destruct. U14101 pn # 237476
GE 52GW947 CTC195 Dead The main power supply is not running because of a shorted Q14101. Replacing Q14101 get the  standby supply running again but the 140 B+ line is running in excess of 230 vdc. Q14101 will short out again in a few minutes. When checking around U14101 we found the feedback reference B+ going to U14101(1) was zero volts instead of 0.4 ~0.5 volts. This was caused by a leaky CR14611. This in the SMD mounted directly under the IC on the opposite side of the board.
RCA PS32500 CTC197 Dead PS32500 Unit is dead will not power up. Unit appears to have normal data and clock and all B+'s appear to be normal. Unit has DATA Clock, Reset, B+, on all  components that connect to the T-4 chip. Q14301( C) was at 36 volts all the time. It never changed from stand by to run mode. There was Horizontal drive to Q14301(B) at nearly 2 volts peak to peak. This high drive voltage indicated that Q14301 base was open, and it had a emitter/Collector leakage. Replaced Q14301 PN# 146851
PSN PS27500 CTC197 Dead Unit has no standby voltages Secondary B+ is pulsing. All voltages on secondary are pulsing at about 1/2 of their normal values. Checking all the silicon components in the primary I found a 10 ohm short across CR14102. This was caused by a shorted C14147 1.5 mfd @ 100vdc. Part number 214049
RCA F36674 CTC197 dead F36674 Unit is dead. Power supply is squealing from power supply.  Checking a visual check of the supply finds nothing noticeably burned. But an ohms check on Q14401 fins a 30 ohm to ground. Checking the following components we found C14401, and CR14401 & Q14802 shorted. It is suggested that these and the following components be replaced, C14410, C14800, CR14800, CR14401. 
PSN F36677 CTC197 DEAD F36676 Unit was dead had a bad flyback transformer was defective and was changed. Now main B+ current and horizontal timing pulse are normal. When power is applied plug-in B+ at collector of horiz out starts out about 140V, but then runs away to over 170V and resistor R14126 (30K) goes up in smoke. Tech statically checked the surrounding components, and they checked OK seem to check OK. R14126 is in the snubber circuit. If that guy blows you will need to replace C14122, CR14122, and C14128. Back EMF from T14101 is killing this resistor because one of the components in the snubber circuit has failed. As long as the flyback does not have a short circuit in the primary winding to ground, the power supply will produce approx. 165 vdc at CR14106(K) with no load. Static checking the components listed above will not tell you the true story about their health. REPLACE THEM!. Note: follow up----The device that was bad is CR14122.
RCA PS27500 CTC197 dead PS27500 Unit had a shorted  Chopper transistor Q14101 and a open R14145. These items were replaced but still no operation of the SMPS. It is a mystery why the resistor R14145 would be open and the FET Q14101 too. It is possible the set may have been hit with a line surge taking out the R14103 too. What is known is the set has no stand by voltages and no noise from power supply. Unit had defective Q14101, R14145 & R14103. Replacement corrected the fault.
RCA PS27500 CTC197 dead PS27500 Unit had a shorted Chopper transistor Q14101 and a open R14145. These items were replaced but still no operation of the SMPS. It is a mystery why the resistor R14145 would be open and the FET Q14101 too. It is possible the set may have been hit with a line surge taking out the R14103 too. What is known is the set has no stand by voltages and no noise from power supply. Unit had an open in the trace from the R14103 to pin U14101(6)
RCA PS32109 CTC197 dead PS32109. Unit will not power up. No LED flashing in front.  When checking the standby voltages from the output of the SMPS we found the supply has all stand by sources except the 16 volt source from CR14107. Further inspection finds that CR14107 has a severed leg at the body of the device hidden by its ferrite bead.
RCA PS32500 CTC197 dead PS32500 Serial 835631100. Unit is basically dead. No secondary supply voltage in the stand by mode. All raw DC voltages are there in the primary side All primary voltages of power supply are present with the exception of U14101(3) which was "0" volts DC. This is one of the initial start up voltages for the Power Supply regulator IC. R14145 a 270K resistor was open in the primary of Power supply. Replacing it corrected the fault.
RCA PS32500 CTC197 dead PS32500 Serial 835631100. Unit is basically dead. No secondary supply voltage in the stand by mode. All raw DC voltages are there in the primary side All primary voltages of power supply are present with the exception of U14101(3) which was "0" volts DC. This is one of the initial start up voltages for the Power Supply regulator IC. R14145 a 270K resistor was open in the primary OF Power supply
RCA PS32500 CTC197 dead PS32500 serial 8434313798. No stand by voltages from secondary of power supply. No oscillation from SMPS. Checking the e Soft start B+ at U14101((3)  finds it to be "0" volts. D.C. resistance to ground is Approximately 5K (Normal) R14145 open (270K 1/2 watt) P N #193067
RCA PS32500 CTC197 dead PS32500 serial 8434313798. No stand by voltages from secondary of power supply. No oscillation from SMPS. R14145 open
PSN PS36605 CTC197 Dead PS36605 Serial 835641207. Tech went out and resoldered the tuner for intermittent reception. Now the set is dead. All stand by voltages are normal. Checking the DATA and CLOCK lines on U13101(3 & 4) find they are 13K resistance to ground. The same is true with U17501(18 &19) This indicates the I2C bus is not shorted or open and nothing bad happened in the resoldering process of the tuner. I next had the tech cut jumper wire JW12410 located at LL8 on the deflection circuit board. This turns on all of the switched Post regulators U14701, U14104, U18101... etc. Once confirming these regulators were running the next test was to see if U16201(20) had B+. It must be 7.5 vdc. In this unit the voltage was zero volts. It was discovered that there was no voltage at R14102. Following the traces to JW12143 location MM3 finds that one side of the jumper was torn loose from the trace. This apparently happened during the servicing of the tuner. 
RCA PS32500 CTC197 Dead Unit is basically dead. No secondary supply voltage in the stand by mode. All raw DC voltages are there in the primary side. All primary voltages of power supply are present with the exception of U14101(3) which was "0" volts DC. This is one of the initial start up voltages for the Power Supply regulator IC. R14145 a 270K resistor was open in the primary of the power supply.
RCA F36674 CTC197 Dead Unit is dead. Power supply is squealing.  A visual check of the supply finds nothing noticeably burned. But an ohms check on Q14401 finds a 30 ohm to ground. Checking the following components we found C14401, and CR14401 & Q14802 shorted. It is suggested that these and the following components be replaced, C14410, C14800, CR14800, CR14401. 
RCA PS32109 CTC197 Dead Unit will not power up. No LED flashing in front. When checking the standby voltages from the output of the SMPS we found the supply has all stand by sources except the 16 volt source from  CR14107. Further inspection finds that CR14107 has a severed leg at the body of the device hidden by its ferrite bead. There was not enough lead to connect it to the board. Replacement corrected the problem.
PSN PS27500 CTC197 Dead Unit will not turn on. If the Secondary B+ finds it pulsing. All voltages on secondary are pulsing at 30% of their values. Checking all the silicon components in the Primary I found a 10 ohm short across CR14102. This was caused by a shorted C14147 1.5 mfd @ 100vdc. Part number 214049
RCA PS32500 CTC197 Dead Unit will not turn on. Unit does not have any action of LED's on front. U13102(8) the EPROM we find 5 volts but the reset on the CPU- U13101(51) finds it running at (0) volts instead of 5 volts. Micro is stuck in reset. Measuring the voltages at the secondary of T14101 finds that all the voltages at each diode is correct with the exception of CR14107(C) They should be 15 volts but it was only 8 volts. Checking the voltage at the filter C14106 finds the voltage is "0" volts. There was a hairline separation in the trace between CR14107 and the high side of C14106. 
GE 46GW945 CTC195 flagging 46GW945 serial 908341233. Unit has Flagging at the top of the screen when playing certain pre-recorded video tapes. This does not ever show up on over the air signals but only happen with video tape. U16201 & C14307 was changed  without effecting the symptom. It was discovered that a blocking capacitor C12710 was thermally sensitive. Replacing the component corrected the symptom.
RCA Ps27500 CTC197 Focus PS27500 serial 849631944 Unit has an out of focus band across the screen  that related to contrast in the picture Unit has defective CRT.  When moving focus control through its range the band get thicker and spreads wider. Unit has defective CRT
RCA PS27500 CTC197 focus Unit has an out of focus band across the screen that related to contrast in the picture Unit has defective CRT 
RCA P52920 CTC195 ghosting P52920BL When watching the main video and PIP off there is a faint ghost image that floats through the screen. If the PIP channel is selected to a vacant channel the ghostly image disappears. This ghostly image is caused by internal leakage of the PIP video source to the main video. The FPIP IC U18100 is responsible for this trouble
RCA P52920 CTC195 ghosting P52920BL When watching the main video and PIP off there is a faint ghost image that floats through the screen. If the PIP channel is selected to a vacant channel the ghostly image disappears. This ghostly image is caused by internal leakage of the PIP video source to the main video. The FPIP IC U18100 is responsible for this trouble
PSN PS50700 CTC195 HEAVY LINES PS50700 Unit has a symptom of heavy lines through the picture that resemble Line paring.  Only one tech has seen this symptom and his explanation leads me to believe the symptom may not be line paring as originally described, or at least caused be a high frequency oscillation in the ramp used to drive the vertical winding of the main deflection yoke. Possibly this symptom is more a video or luminance problem rather than a deflection. Asked the tech to try an monitor the video while heating or freezing U18100 or the 3.3 volt regulator U18101. U18100 is the FPIP chip
RCA P46820 CTC195 HIGH VOLTAGE P46820 Television has no high voltage but has sound. Tech replaced the EPROM, HIV block and still unit will not develop high voltage.  When checking the Q14401(C)the voltage is running 165 in standby and 163 in run modes. The same is true for Q14301 the horizontal driver transistor. If the Q14401(E &B) were shorted out and measuring Q14301(C) the voltage drops to 65 volts. This indicates we have horizontal drive. Next the tech need to disconnect the anode at the chimney of the flyback and see if the HIV returns. It doesn't. The need to check for the presence of horizontal drive to the base. We had drive to the Q14401(B) but nothing at collector. Closer inspection found an open in the emitter ground return of Q14401 at the foil land around the lead of the transistor. Resolder transistor and restored normal operation.
RCA P52920 CTC195 HIGH VOLTAGE P52920BL serial 911341260. Unit will not turn on. Never seems to develop horizontal drive at the collector of Q14403 horizontal driver transistor. We were able to get the set up and running by aggravating the chassis and turning it over. We could then read the error codes listed in the EPROM. These error codes were 16 in all 3 parameter locations.
PSN PS35500 CTC197 HIGH VOLTAGE PS32500  Serial # 905231577 Unit will turn on but not develop high voltage. When the flash on set is turned on the power led will light up but it will only flash 3 times then stop LED will flash if there is no high voltage, and it will try to restart. The collector of  Q14401 and Q14301 measures 165 vdc in the stand by mode. When the set is turned on the voltages drop to 133 & 80 volts respectively. I asked the tech to jumper Q1440
PSN PS35500 CTC197 HIGH VOLTAGE PS32500 Serial # 905231577 Unit will turn on but not develop high voltage. When the flash on set is turned on the power led will light up but it will only flash 3 times then stop LED will flash if there is no high voltage, and it will try to restart. The collector of Q14401 and Q14301 measures 165 vdc in the stand by mode. When the set is turned on the voltages drop to 133 & 80 volts respectively. I asked the tech to jumper Q14401(E&B) together and turn on the set and measure the collector of the Q14301(C ). It was 
RCA P52920 CTC195 horizontal P52920BL Unit will not turn on. Never seems to develop horizontal drive at the collector of Q14403 horizontal driver transistor. We were able to get the set up and running by aggravating the chassis and turning it over. Closer inspection fines the connections at the horizontal driver transformer were bad. Resolder T14301.
RCA PS56700 CTC195 HORIZONTAL PS56700 Unit has insufficient horizontal sweep.  Tech needs to measure the voltage at Q14802(C ) It should be approximately 13 ~ 15 volts nominally. This one was 26.9 volts. Q14802(B) was 1.1 volts and Q14802(E) was 0.03 volts. With these readings the transistor must be open. It is a NPN Bipolar transistor. The base can never be higher the 0.7 volts above the Emitter without putting the device into total saturation. Unit has defective Q14802 part number 217802. After replacing the device the horizontal size and Pin amplitude needed to be readjusted by varying the values
PSN PS36605 CTC197 HORIZONTAL PS36605 serial 845341315. Unit has a symptom in the video where if vertical lines were to be displayed on the screen they have a horizontal time base jitter. The Jitter causes the lines to e broken up into what appears like dots across a 1/2 wide area from the left and right of the vertical line. This only appears on the extreme left and right side of the picture and quickly diminishes as we look at the second and third vertical from the far sides.  I had tech short the Pin modulator diode CR14800, and see if this symptom disappeared. It did. The trouble is caused by some high frequency ripple or noise in the pin modulator circuit. Checking with oscilloscope the source of the E/W pin correction at U16201(17) was very clean. However at the second output of the dual op amp U14802(7) was very noisy. A slight parabolic waveform could be seen but had a lot of high frequency noise on the leading edge of the parabolic wave. Closer inspection of the board found the C14804 a .027 mfd SMD had fallen off the board. After reinstalling the capacitor the vaveform cleaned up with almost no high frequency noise.
RCA PS36605 CTC197 horizontal The TV has flagging at the top of the screen. This is intermittent. Horizontal and vertical sync is extracted internally in U16201. The video must be a  minimum of 1 volt pp measured at U16201(38). This television was only 800 mv. However at the C12710(minus) we had 1.1 volts pp video, where the other side we only had 0.8 volts. The ESR of this capacitor was over 150 ohms. Unit had defective Capacitor. C12710
PSN PS50700 CTC195 Horizontal banding This TV had a very odd banding problem where the brightness was inconsistent from the top to the bottom of the picture. It was hard to see with constantly changing video, but was very noticeable with a stationary neutral color from a gray scale signal generator. The symptom was constant but could only be seen if the luminance level was dropped to 20 IRE. At that level the top & bottom 1/3 of the picture was darker than the center of the picture. We chased this problem all the way through the video circuit, all the way to the cathode of the CRT, and found nothing unusual. But when we scoped the G1 supply to each CRT we found 3.3 volts peak to peak ripple at 16.6 milli seconds. This ripple was phase locked to the vertical rate. This ripple was traced back to the OP amp U19001(1). Checking around this circuit we found the ripple was trace on U19001(2 & 3) Problem was caused by a defective R19007 a 2K Ohm resistor.
RCA PS50670  CTC195 horizontal lines Unit has several horizontal bars across the screen  Open capacitor C12711 From U18100 
RCA PS50670 CTC195 Horizontal smear PS50670 serial 7352909204 Unit has a blue horizontal smear on blue only Unit has a defective Blue CRT socket. 
RCA PS52920 CTC195 Horizontal sweep Unit has insufficient horizontal sweep when beam current increases. Lower the beam current the picture gets wider. All B+'s from SMPS are normal. Checking Q14802© fids the voltages vary wildly fro 8 to 30 volts depending on how bright the screen is. Checking the ABL line finds R12709 a 27K 1/2 watt resistor increased in value to over 50K
RCA PS52920 CTC195 Horizontal sweep Unit has insufficient horizontal sweep when beam current increases. Lower the beam current the picture gets wider. All B+'s from SMPS are normal. Checking Q14802© fids the voltages vary wildly fro 8 to 30 volts depending on how bright the screen is. Checking the ABL line finds R12709 a 27K 1/2 watt resistor increased in value to over 50K
GE 46GW947 CTC195 Intermittent DEAD 46GW947 Unit may turn on sometimes But when turned off then on again it will not turn on. Checking the Error codes we find Error code 16 listed 3 times. This indicates the I2C bus is held to a logic "0" There are 3 components that need to be changed or added to increase the reset time of the FPIP IC. This reset timing change will prevent the FPIP IC from trying to communicate with a less than adequate reset period. 1. Add a 2.2K resistor (192096) from U18100 (21) to ground.2. Change the value of R18116 to 100K (192084) Located off U18100 (23) 3. Change value of C18121 to .33 mfd (220132) Located off U18100 (23). 
RCA PS61700 CTC195 intermittent dead All stand by B+ are normal. On U13101(19) goes high when the power button is pushed. When turning chassis on it's side the set will turn on and operate normally. When entering the tech menu the error codes indicate 16 in all 3 parameter values. An error 16 indicates a Run address is being held to a Logic "0".. When discussing the service history of this television we discovered the tuner had been previously worked over where the shield was removed and the grounds inside the tuner shield. With closer inspection we found at  position X=-898.000 Y=1289.42 (When using The Thomson ESI software for this chassis) A small solder splash of solder spilled over from the ground shields and the Data trace entering the tuner through a tiny opening between the grounding shield. The data circuit trace makes a 90 degree turn out of the tuner shield and only clears the ground lug by 0.020 of an inch. Cleared the solder splash and the intermittent nature of the chassis stopped.
GE 46GW945 CTC195 lines 46GW945 Unit have heavy lines across the picture. This lines only show in the tuner mode and are not apparent in the video mode. It may be these lines are caused by the a condition in the tuner on the data line off of U17501(18). Manufacture upgrade bulletin TVP97021 has us replace R17520 and C17503, Part # 218508 & 194903 respectively. This upgrade solved the symptom.
GE 46GW945 CTC195 LINES 46GW945,Serial # 737692441, Chassis PKK195AA.  Unit has a single thin 6 inch long horizontal green line in the lower left hand corner of the screen. When feeding a 100 IRE signal to the set The line is very evident. But when the convergence yokes are disconnected odd shaped line disappears and we see an out of convergence picture. This test proved the symptom was caused by distortion from the convergence output section. The problem was localized problem to the green convergence geometry circuitry. Tech used freeze mist and heat to isolate the trouble. Tech finally found Q19325, the gv input transistor to be thermal sensitive. Tech could heat the transistor and the line would slowly disappear. Tech did not have this transistor in stock. So it was swapped it with its red counterpart and bingo the distortion was transferred to the red. The part has been ordered. and has corrected the trouble.
GE 46GW945 CTC195 LINES 46GW945,Serial # 737692441, Chassis PKK195AA. Unit has a single thin 6 inch long horizontal green line in the lower left hand corner of the screen. When feeding a 100 IRE signal to the set The line is very evident. But when the convergence yokes are disconnected the line disappears. In fact it returns when only the green is connected.  The problem was localized problem to the green convergence geometry circuitry. Tech used freeze mist and heat to isolate the trouble. Tech finally found Q19325, the gv input transistor to be thermal sensitive. Tech could heat the transistor and the line would slowly disappear. Tech did not have this transistor in stock. So it was swapped it with its red counterpart and bingo the distortion was red. The part has been ordered. and has corrected the trouble.
GE 46GW945 CTC195 lines Chassis PKK195AA.  Unit has a single thin 6 inch long horizontal green line in the lower left hand corner of the screen. When feeding a 100 IRE signal to the set, the line is very evident. But when the convergence yokes are disconnected the line disappeared The problem was localized to a problem in the green convergence correction circuitry.  Tech used freeze mist and heat to isolate the trouble. Tech finally found Q19325, the gv input transistor to be thermal sensitive.  Tech could heat the transistor and the symptom could be aggravated. PN# 239193
RCA PS50670 CTC195 Lines PS50670 737690965. Unit has several horizontal bars or lines across the screen in the tuner mode. Open capacitor C12711 From U18100 
RCA PS50700 CTC195 LINES PS50700 737690965 This television  has heavy lines through out the picture. It is visible in the tuner and video mode. Checking the video from the FPIP chip we found heave noise at U18100(41) but nothing at the input of U18100(51). It was discovered that video was normal at Q18110(E). It was discovered that C18101 was cracked. Pn# 220132
RCA PS32500 CTC197 LINES PS32500 serial 8496314132 Unit has bright screen with retrace lines Unit has 200 vdc source voltage from the cathode of CR14702. But on the CRT driver board a resistor R15108 is burned up. This resistor is attached to theG1 supply for the CRT. It may be possible the CRT arc A80AEJ16X09 tube ser D-WBLTG055 code date L28GE17. DOP is 1-17-99. 
GE 46GW945 CTC195 LUMINANCE No luminance has on screen display and cross hatch for setting up convergence and geometry settings. Symptom is the same no mater what input is chosen. Need tech to check the output of U18100(41). There was no luminance from the U18100(41). Next step was to see if there was Luminance from the D/A converter inside U18100(49). These was a small amount of noise on that pin, but no luminance. Measuring the voltages at U18100(9,10,12,&13) found that 12 was only 0.11 volts when it should be 0.5. Checking resistance to ground at this point (U18100(12) we found it to be 281K. Removing capacitor C18117 increased the resistance at 12 to over 15megs. Replacing C18117 corrected the no luminance symptom. Part #227413 a 1mfd @ 25vdc SMD component.
GE 46GW945 CTC195 noise 46GW945YX1 serial 812744002. Unit has a ringing noised coming from inside the television. Customer explains that the noise is no too bad when it is first turned on but get worse after the set has been on a while. Tech unable to hear the High pitch squeal.ĥĀP52820ȀPS46820̀CCPS46820B Only problem that I have encountered are Linearity coils and flybacks. Usually they will change pitch if one applies pressure to the coil core frame of the coil or transformer. Also if the Ferrite beads used on the any of the power Diodes on the chassis are loose then they must be glued in place with hot glue.
GE 46GW945 CTC195 noise 46GW945YX1 serial 812744002. Unit has a ringing noised coming from inside the television. Customer explains that the noise is no too bad when it is first turned on but get worse after the set has been on a while. Tech unable to hear the High pitch squeal. Tech line support tracking number is T908134 Only problem that I have encountered are Linearity coils and flybacks. Usually they will change pitch if one applies pressure to the coil core frame of the coil or transformer. Also if the Ferrite beads used on the any of the power Diodes on the chassis are loose they will also sing.
RCA P52920 CTC195 OSD P52920 Serial 916241313R CTC195KB The TV guide plus will turn on but the On Screen Display is not in sync with the display video. However the OSD for the television set up menu is properly synchronized. Initializing the TV guide PLUS by entering the TV guide Plus setup menu and pressing "GOback" twice, then "TV" will not correct this symptom. will not enter the TV guide set up menu I had tech go into the rear of the set and inspect the connectors that interface the TV guide Plus module to the main chassis. It was discovered the connector J26403 was not fully seated in the GEMStar module. Reseating the connector corrected the symptom
RCA PS56670 CTC195 Piecrusting Unit has piecrusting on the left and right side of the picture. This piecrusting disappears after a few minutes then it will clear up and operate normally Suggest the tech look into the horizontal pincushion circuit and try to aggravate the  pin amp by heating or freezing. Also try to increase the horizontal size or pincushion geometry and see if the symptom get worse. Possible causes pin cushion coil.
RCA 52GW945 CTC195 Pincushion TV has an hour glass shaped picture. Also insufficient horizontal sweep.. When trying to move the parameters for horizontal size and Pincushion, the numbers will change but no effect on the screen Measuring Q4802(C ) we found the voltage to be just over 27 volts. This should be around 16 volts with a vertical parabolic wave at about 16 volts peak to peak. There was no signal at Q14802(B). When checking around the U14801(7)=0 volts, 6= 4.0 and 5=0.9 volts. Pulling U14801(5) with a pull up resistor of 2K attached to a 5 volt source the raster will fill out. Checking the components statically in the area we found that R14807 a 120K resistor was open. Replacing resistor corrected the reported trouble.
RCA PS61700 CTC195 PIP P61700 Unit has no PIP picture. Just a black square from the PIP tuner. The external input from video 1 and 2 are fine. Tech needs to check the presence of video at U26901(10). This is the input of video from the PIP tuner. There was no signal. The same was true at P26904(2). This connector is from the PIP tuner. Tech needs to check the signal from the PIP. After disturbing
RCA PS61700 CTC195 PIP P61700 Unit has no PIP picture. Just a black square from the PIP tuner. The external input from video 1 and 2 are fine.  Tech needs to check the presence of video at U26901(10). This is the input of video from the PIP tuner. There was no signal. The same was true at P26904(2). This connector is from the PIP tuner. Tech needs to check the signal from the PIP. After disturbing the PIP module we discovered an intermittent 
RCA PS50700 CTC195 PIP PS50700 serial 920651051. Unit has intermittent chroma on PIP only. Main always has chroma Suggest the tech supply color bars to the screen and select the PIP and main to be the same source. Check for the same level chroma burst pulse on U18100(1 & 51). If they are the same continue to the  output of this IC18100(31 &47). If that is OK then U18100(37 & 45). The main and PIP chroma signal respectively. If a problem in the Tuner/I.F. were causing the chroma to be defective we would see a difference when compared to the main chroma. U18100 is the FPIP chip which houses both comb filters for main and PIP video. It also houses both A/D converters for main and PIP chroma. If the same NTSC color bars signal is forced through the Main and PIP tuners, the chroma amplitude must be identical on PIP as it is for the main up to U18100(37). 
RCA PS61700 CTC195 PIP Unit does not have PIP video. There is a black square where the PIP should be but no raster in the PIP area.  U18100 is the FPIP IC that mixes both Main video with PIP video. As long as there is PIP video getting to U18100(51 and 1) Either source can be used for PIP Then the IC should comb out the Luminance and Chroma, and send both PIP luminance and chroma to U18100( 35 & 33).. In this case there is no PIP video getting to U18100(1) from U26901(13) Tech need to capativitly couple the video from U26901(10 To 13) with a 10 mfd electrolytic. This should couple video into the FPIP chip. This will test the operation of the FPIP chip. Possible defective U26901
RCA PS50700 CTC195 pip Unit has intermittent chroma on PIP only. Main always has chroma. Suggest the tech supply color bars to the screen and select the PIP and main to be the same source. Check for the same level chroma burst pulse on U18100(1 & 51). If they are the same continue to the output of this IC18100(31 &47). If that is OK then U18100(37 & 45), the main and PIP chroma signal respectively. If a problem in the Tuner/IF were causing the chroma to be defective we would see a difference when compared to the main chroma. U18100 is the FPIP chip which houses both comb filters for main and PIP video. It also houses both A/D converters for main and PIP chroma. If the same NTSC color bars signal is forced through the Main and PIP tuners, the chroma amplitude must be identical on PIP as it is for the main up to U18100(37). 
PSN PS36605 CTC197 PIP PS36605 When the PIP is turn on the PIP has a sever stretch to it and will not correctly position itself using the remote control. The Square box for the PIP gets stretched across the screen when trying to move to the opposite side of the screen. U18101 is the only thing that will cause this problem It is the F2PPIP chip. It handles all PIP insertion functions, Comb Filter operations for both PIP and Main. Tech  changed U18101 and solved the trouble.
RCA PS36700 CTC197 PIP PS36700 Unit operates fine intermittently but the lower portion of the screen has a 50 IRE bar that matched exactly the size of the PIP box. When the PIP box is invoked and moved up the screen the 50 IRE bar moves with it. Because of the thorough description of this symptom it appears the trouble must be in the FPIP IC U18100. This IC is used for the PIP and comb filter for both main and pip video.
RCA PS50700 CTC195 programming PS50700. Cannot program the new remote to the cable box. The new remotes like the CRK76T require a 4 digit code to program them. The customer is using the wrong user manual for there remote. Sending out correct manual. To set up the CATV box (TOCOM) we needed to select 5004, 5041, or 5023 to get the remote to respond.
RCA 52GW945 CTC195 Raster Dark Unit had T14404 replaced after a catastrophic failure. Qi4401 and the flyback were change. Now the TV works but it w=ill not achieve enough brightness. If the G2 is increased the CRTs will get retrace lines but still not achieve a real bright picture. Tech suspects the CRT's. Before condemning the CRT the cathode voltages are checked to discover the voltage never drops below 183 volts no mated how hard we drive the CRT. Monitoring the ABL input of the Jungle IC U16201(28) we found that the voltage never varied from 7.5 volts no mater how hard we drive the CRT, It was further checked ate the flyback ABL line T14401(5) the voltage swung wildly from near zero volts when CRTs were dark to a -30 volts when driven hard. Problem was a damaged R12709 a 27K resistor. This resistor must have opened when the flyback shorted.  Replacing the device cured the trouble.
GE 46GW947 CTC195 Raster,  retrace lines 46GW947 serial 930441865  Unit has excessive green Drive resulting in retrace lines.  G2 voltage measures in excess of 820 vdc at the CRT socket. Removing the CRT socket drops the G2 voltage to 220 ~ 410 vdc when adjusting the G2 through its range. Obtained VLS # from Thomson because of defective CRT. Green CRT # is 240621. VLS# CI0012-PC
PSN PS61700 CTC195 RASTER, None PS61700 serial 849551392 Unit does not have raster. PIP and OSD are normal but no main video. No main video at U18100(51) But video OK at U26901(13). Video OK @ Q26901(E). Video OK @ Q18110(B) but nothing on the Emitter. Base & Emitter measures 2.3 & 11.7 volts respectively.  Tech is looking at a defective Q18110 or an open connection on the transistor. Closer inspection found the Connections on 2 of the elements of Q18110 were never soldered.
RCA P52920 CTC195 Raster, None P52920 Unit had a symptom of DEAD. Flyback was replaced but now has dim  raster.  R12709 is cracked into two pieces. Unit must have had a defective flyback transformer. This resistor is the ABL feed back loop and must have opened because of a catastrophic increase in ABL feedback voltage from the flyback. Tech needs to replace the flyback but also needs to inspect the B+ supply it insure it has not been damaged. Flyback replaced and set was working again.
RCA PS56670 CTC195 Raster, none PS56670 Serial 741590730 Unit has No raster but has sound and high voltage. Previous tech ordered the HV block thinking the set did not have high voltage. But when it was installed the symptom remained the same.  I had tech feel the PTV aux board heatsinks and they were cold. Also it was noticed the filament were not lit. However we did have a 9 volt a.c. for filaments at T14401(8) Checking the condition of the current limiting resistor R14703 located at NN21 on the deflection board found it to be open. Resistor is a 0.56 ohm at 2 watts.
RCA PS56670 CTC195 raster, none Unit has No raster but has sound and high voltage. Previous tech ordered the HV block thinking the set did not have high voltage. But when it was installed the symptom remained the same. I had tech feel the PTV aux board heatsinks and they were cold. Also it was noticed the filament were not lit. However we did have a 9 volt a.c. for filaments at T14401(8) Checking the condition of the current limiting resistor R14703 located at NN21 on t
RCA PS56670 CTC195 raster, none Unit has No raster but has sound and high voltage. Previous tech ordered the HV block thinking the set did not have high voltage. But when it was installed the symptom remained the same.  I had tech feel the PTV aux board heatsinks and they were cold. Also it was noticed the filament were not lit. However we did have a 9 volt a.c. for filaments at T14401(8) Checking the condition of the current limiting resistor R14703 located at NN21 on the deflection board found it to be open. Resistor is a 0.56 ohm at 2 watts.
PSN PS50700 CTC195 RASTER, None No raster, no OSD, No PIP. However the unit has Sound, CRT filaments, and High voltage. Futher checking we found that the TV had horizontal and vertical sweep by rasing the G2 voltage. G2 had to be cranked up all the was just to get a slight raster. Checking the voltages around the CRT we found the G1 voltage to be missing. The G1 vooltage comes from the Digicon module and is used to mute the raster in the event of scan loss. Sure enough the transistor Q19802 was in saturation. This device should have collector=170 vdc, base=0, Emitter= ground. In this unit we had zero volts all around the transistor. It was shorted. Replacing the device corrected the problem. PN # 226453
RCA P62912 CTC195 RASTER, NONE Unit will turn o, has high voltage and sound but no raster. Cannot see filaments on any CRT Checking around deflection board we found the filament current limiting resistor over heated. R14703. Checking resistance found it was approx 10 ohms. It should be 0.56 ohmsm pn# 239115. Replaced resistor and cleaned the oxidized coper traces and the set returned to normal operation
RCA P52920 CTC195 RASTER, retrace lines P52920 Unit has a brighter than normal screen with retrace lines. There is a semi normal picture but the contrast is washed out slightly. I asked tech to go into the video input mode, with no video connected. It should display no raster, just the OSD of the Video input status. The set has a slight retrace lines. Tech will need to adjust the G2 down enough to extinguish any raster from each tube. This corrected the symptom.
RCA P46812 CTC195 RASTER, washed out P46812, serial740491803, Claim# Unit has washed out picture. Can not extinguish the raster with the G2 control. Tech has measured the Cathodes of the CRT and found them to be near to 135~ 145 vdc. These voltages at the CRT cathodes are a bit low. They should be in the area of 180 ~ 185 in order for the tube to be in cut-off. Tech need to measures the raw 200 vdc source from the Flyback at the cathode of CR14702. This should be 200 vdc. If not replace Diode, check R14701 = 10ohm 1/2 watt resistor, and C14703 = 47mfd @ 315 vdc. If the voltage is good tech may need to isolate the T4 chip for it may be over driving the device. Tech found the 200 volt line was low, about 90 volts. Traced the fault to an open connection to C14703 near the fly back transformer on the main chassis. It was not a loose connection but actually a broken trace where the cap mounted to the board. As if the cap was forced through. He also found that the tuner grounds needed to be soldered too. 
RCA P46812 CTC195 Raster, washed out Unit has washed out picture. Can not extinguish the raster with the G2 control. Tech has measured the Cathodes of the CRT and found them to be near to 135~ 145 vdc. These voltages at the CRT cathodes are a bit low. They should be in the area of 180 ~ 185 in order for the tube to be in cut-off. Tech needs to measure the raw 200 vdc source from the Flyback at the cathode of CR14702. This should be 200 vdc. If not, replace Diode, check R14701 = 10ohm 1/2 watt resistor, and C14703 = 47mfd @ 315 vdc. If the voltage is good, tech may need to isolate the T4 chip for it may be over driving the device. Tech found the 200 volt line was low, about 90 volts. Traced the fault to an open connection to C14703 near the flyback transformer on the main chassis. It was not a loose connection but actually a broken trace where the cap mounted to the board, as if the cap was forced through. He also found that the tuner grounds needed to be soldered. 
GE 46GW945 CTC195 remote 46GW945 serial 829642628 Unit does not have good remote sensitivity. All functions at the front keyboard work correctly. When checking the Data out of the IR receiver the line mostly maintains a 5 volt high. The has bad IR receiver IR13401. Part number received is a 229218 which is  the wrong style. It has a metal case. The original Receiver is a TO-220 style plastic case device. Another receiver part number is 245282. There is also a part number 225032 will also work.
RCA PS32500 CTC197 REMOTE PS32500 ser 905231515. Unit has no remote control functions.  Unit has all functions on the front panel keyboard. When checking the Data out of the IR receiver all we are getting is a 5 volt high. No part number is listed for this item in the ESI or parts finder software. Unit has defective IR13401 IR receiver part number 245282. This is the all plastic opaque type
RCA PS32500 CTC197 remote PS32500 serial Unit will not operate with remote. All functions operate on front panel keyboard. Unit has all functions on the front panel keyboard. When checking the Data out of the IR receiver all we are getting is a 5 volt high. No part number is listed for this item in the ESI or parts finder software. Unit has defective IR13401 IR receiver part number 245282. This is the all plastic opaque type
RCA PS36500 CTC197 REMOTE PS36500 serial 8296314891 Unit has poor remote sensitivity. MK2198. Unit was serviced before for the same trouble but it appears it was not corrected. If the IR. receiver is pulled out from inside the television the remote control works fine. Observing the cabinet opening where the IR. light, from the outside world comes from we find a solid piece of plastic covering any type of lens of IR. band pass filter that might be built into the cabinet. It is unclear how this IR. information is getting to the IR. receiver if the area exposing the IR. receiver is shadowed by a solid black piece of plastic. Tech need to order the mask assay. MK2198. But when the Mask came in the piece that held the IR. sensor was missing from the Mask assembly.. Called Larry May at RCA the part number of what we need is 243585. 
RCA PS32500 CTC197 remote Unit  has no remote control functions. Unit has all functions on the front panel keyboard. When checking the Data out of the IR receiver all we are getting is a 5 volt high. Unit has defective IR13401 IR receiver part number 245282.
GE 46GW945 CTC195 screen  46GW945 Unit has a "U" shaped shadow located at the bottom of the screen. The shape is 2 feet across and appears to be inside the screen.  Set is under warranty and customer claims it just appeared one day. This damage was done by the customer. It is not covered by  MFG warranty. Customer sprayed a glass cleaning compound on the screen and it ran down the Lenticular lens and pooled at the bottom of the two lenses that make up the screen. Capillary action pulled fluid up the groves in the Fresnel lens. What ever the compound was it does not clean out of the Fresnel groves.
GE 60GW947 CTC195 screen temperature 60GW947 serial 932541881. Unit has a green picture effecting the screen temperature. Cannot adjust the green drive down.  The reason that green will not turnoff is because someone had swapped the blue and green CRT driver boards. These boards are exactly alike with the with the exception of the placement of 3 jumper JW152256, JW152257, JW152258. For the green cut JW152256 & JW142258. For the Blue cut JW152257 & JW142258, For the RED cut JW152256 & JW142257. Cutting the correct jumpers corrected the problem. 
GE 46GW945 CTC195 screen  46GW945 serial 852241070 Unit has a bulge on the screen. This bulge is centered in the optical center of the screen a. Customer claims this has been there since the set was delivered in January The manufacture normally will cover defects in the screen if they are told at the time of delivery. They are much lees apt to replace the screen after 4 months, and become skeptical about it being a manufacture defect but rather a customer misuse or neglect issue.
GE 46GW945 CTC195 screen  46GW945 Unit has a "U" shaped shadow in the screen that cannot be removed. Set is under warranty This damage was done by the customer. It is not covered by ESP or MFG warranty. Cust sprayed a glass cleaning compound on the screen and it ran down the Lenticular lens and pooled at the bottom of the two lenses that make up the screen. Capillary action drew the moisture up the Fresnel lens in a "U" or half circle shape to conform to the special cuts in the fresnel lens. 
RCA PS50700 CTC195 shutdown PS50700 serial 851351045 Unit intermittently shuts off and will turn back on again with remote or Front panel controls. This unit is so intermittent that the tech cannot isolate it 1 single failure code. When checking the error codes the first time they were 18, 16 & 16. The next time they were 16, 66, 64. We are unable to isolate the failure code in this unit. OK for IFS
PSN PS27500 CTC197 shutdown PS27500 serial #  933331880 Unit will not turn on unless we forcing the set on by entering the service mode. When the   error codes are 128,  in P1, P2, P3. This indicates the audio decoder failure Checking the B+ to the U11600(22) we  found only 1.1 vdc on this chip. At the Q11600(E) had only1.1 volts and Q11600(B) was 1.3 volts. It was discovered that C11629 located at the base of Q11600 the 9 volt regulator turned into a 42 ohm resistor.
RCA PS36500 CTC197 SHUTDOWN PS36600 serial 8424310552. Unit goes into immediate shut down at power up.  Checking the high voltage the set will develop high voltage but will shut off and cycle on and off. If we disable the horizontal output transistor and try again, the set , obviously not achieve high voltage but it should stay on and provide a horizontal drive signal unit the set is turned off. This was not the case here. The set continued to cycle on and off and provided good horizontal drive at Q14301 horizontal driver transistor. U13101(37) is the only pin that never goes high when training book says it must be 5 volts in the run mode. When checking the other CPU "Must Haves" we find nothing unusual. All B+ sources for stand by and run are normal. Unit approved for IFS
PSN PS27600 CTC197 shutdown Unit will intermittently shutdown and my not be able to turn back on for hours. The set will not record any error codes. It was by chance that we were monitoring the reset pulse at U13101(51). This line went low and did not return to normal 5 volts unless we heated the area around 1 ~5 & A ~ E. These are located on the corner of the CBA. Checking the reset transistors finds that Q13503(B) was at .6 volts keeping the reset on U13101(51) low. Checking back to find he source of the 0.6 volts we found the voltage was increasing as we got further away from Q13503. We finally measured both sides of C13504 ad found that both sides had voltages 5 volts on one side an 3.3 on the other. Capacitor is a .1 mfd at 50 volts PN# 190552. Replacing it and cleaning off the red glue corrected the problem.
PSN PS32600 CTC197 SNOW PS32600  No tuning All snow.   Determined that the unit was band switching. Checked for 33v supply at pin 4 of PLL chip (U17501), "0" volts. Checked 18 ohm 2watt resistor R14159 for open.  Resistor was good. Had 140 volts on one side and next to nothing on the other.  Checked resistance
PSN PS32600 CTC197 SNOW PS32600 No tuning All snow.  Determined that the unit was band switching. Checked for 33v supply at pin 4 of PLL chip (U17501), "0" volts. Checked 18 ohm 2watt resistor R14159 for open. Resistor was good. Had 140 volts on one side and next to nothing on the other. Checked resistance of pin 4 U17501 and found it to be 63 ohms to ground, (sounds like me trouble). Eliminated u17501 by lifting pin 4, also lifted several other parts off of the 33v line. Finally found that the short was originating from the pip tuner. The 33v is fed to both tuners. By disconnecting the plug restored normal tuning to unit, thus verifying that the main tuner was ok. Continued to check for shorts......Found shorted SMD C17407 on the 33v line on the pip tuner board. Replaced and restored normal operation to entire set. Fix: Replace shorted C17407, part# 197600.
GE 52GW947 CTC195 Start up intermittent TV will intermittently not turn on however the Stand by supply is always running. All B+'s from SMPS are normal. Checking the Micro U13101 B+ we found that to be normal as well. Yet the Reset line on Pin 51 was lower than normal, only 4.2 vdc and not very stable. Voltage would vary several tenths of a volt high or low if  the tech heated or froze the components in the area of the reset circuit Q13501, Q13503........ Digging deeper in this circuit we found that Q13501(B) was running at 0.579 volts and was unstable. Both sides of C13504 had a voltage on it 5 on one side and 0.8 on the other. Pressing on the capacitor would send that 0.8 vdc to 5 volts. C13504 was the problem. It was actually the glue that held in place. Part 190552.
PSN PS27500 CTC197 Start up not happening TV will not turn on however the Stand by supply is running. Checking all B+'s from the secondary all b+'s are about 20% greater than what is found when this type of chassis is running normally, with the exception of CR14107. It should have been 16 vdc but in this case it was just less than 10 vdc. Scoping this line we discovered there was almost 10 volts Peak to Peak ripple on that line. Cause was a open C14601.
GE 52GW945 CTC195 STARTUP INTERMITTENT 52GW945 Unit fails to turn on intermittently. When the set finally turns on it may shut down again. Unable to read the error codes directly. Must used Chipper checker to read error codes All Error codes are  "Error 16" There are 3 components that need to be changed or added to increase the reset time of the FPIP IC. This reset timing change will prevent the FPIP IC from trying to communicate with a less than adequate reset period. 1. Add a 2.2K resistor (192096) from U18100 (21) to ground.2. Change the value of R18116 to 100K (192084) Located off U18100 (23) 3. Change value of C18121 to .33 mfd (220132) Located off U18100 (23). 
RCA P52920 CTC195 STARTUP INTERMITTENT P52920 serial 911341268 Unit fails to turn on, sometimes. When the set finally turns on we are able to enter the service error codes which are Error code 16 in P1, P2,& P3 There are 3 components that need to be changed or added to increase the reset time of the FPIP IC. This reset timing change will prevent the FPIP IC from trying to communicate with a less than adequate reset period. 1. Add a 2.2K resistor (192096) from U18100 (21) to ground.2. Change the value of R18116 to 100K (192084) Located off U18100 (23) 3. Change value of C18121 to .33 mfd (220132) Located off U18100 (23). 
RCA PS50700 CTC195 STARTUP INTERMITTENT PS50700 Intermittently the set will not turn on. Tech needs to check U14701, U18101, and U18100. Each of these IC will cause this symptom. U14701 and U1800 are notorious for giving the error code "16"
PSN PS50700 CTC195 STARTUP INTERMITTENT PS50700 serial 934452903 CTC195F3L. Unit has an intermittent "Turn on" function. Once the set is on and running, the set will always play normally. But when the set is shut off the set will act as though it is being turned on but begin to cycle on and off 2 times. Unit is getting high voltage, and all the standby voltages appear to e normal. Chipper Checker determines an Error code 16 which indicates the Run I2Cbuss is stuck to a logic low. There are 3 components that need to be changed or added to increase the reset time of the FPIP IC located inside the Frame Comb module. This reset timing change will prevent the FPIP IC from trying to communicate with a less than adequate reset period.1. Add a 2.2K resistor (192096) from U18101 (21) to ground.2. Change the value of R18111 to 100K (192084) located off U18101 (23)3. Change value of C18118 to .33 mfd (220132) located off U18101 (23) Add a 2.2K resistor (192096) from U18101 (21) to ground.
GE 46GW945 CTC195 System control  Unit does not scan through channels. Cannot turn off the TV guide plus or setup the TV guide channels. Needs to walk through the chipper. Got the unit initialized unit is working properly now
GE 46GW945 CTC195 System Control 46GW945 serial 705390312 Unit has a random functions of the system control not functioning correctly. Random functions will occur Unit has a leaking blue CRT. Unit will need the tube replaced.
RCA 46GW945 CTC195 system control Remote control will not work. Previous tech replaced the Microprocessor and EPROM. That action got the remote to operate, but the set had color tracking and slow tuning problems after the EEPROM change. Also the TV will not autoprogram. Luckily the old Micro and EPROM were still there. I had tech put back old parts and initialize the EPROM with the Chipper Checker . This cured all the symptoms. Set operating normally.
GE 46GW945 CTC195 System control Unit does not scan through channels. Cannot turn off the TV guide plus or setup the TV guide channels. Needs to walk through the chipper. Got the unit initialized unit is working properly now
RCA F36674 CTC197 Tuner gain F36674 serial 810360874. Unit is getting a blank screen stating the words "Weak Signal" Unit is getting Video to the input of U26901(6) but nothing out on U26901(13).  I asked the tech to enter the TV GUIDE plus set up mode and read me the options in the set up dialogue. When the tech got to the part of the set up that discussed "Do you have a VCR?" It had been selected and it was available on Video 1 only. Unit has TV Guide set up incorrectly. I had the tech enter an illegal zip code (99999) and tell the set up the No DSS, no VCR, and No cable box is present. The illegal zip code will cause a auto reset of the TV GUIDE Plus module and will remove it's hold on the chassis tuner. This corrected the problem. Now the tech will need to reset up the TV GUIDE PLUS correctly.
GE 52GW945 CTC195 TUNING 52GW945 serial 912341241. Unit just delivered. Lost reception on all channels. All snow. Tech checked out the reception in the CATV mode and discovered there was reception in the UHF mode. The UHF section of the  tuner takes over when channel 51 is selected when in CATV mode. Had tech check out the U17501(14) to see if there was normal VHF/UHF switching. It was sitting at "0" volts no matter if we were on channel 50 or 51. The trace that connected to one side of R17513 was open.
RCA 52GW945 CTC195 TUNING Lost reception on all channels. All snow. Tech checked out the reception in the CATV mode and discovered there was reception in the UHF mode. The UHF tuner takes over when the channel is selected from CATV 51 and above. We had normal reception all channels above CATV 51. Had tech check out the U17501(14) to see if there was normal VHF/UHF switching. It was sitting at "0" volts no matter if we were on channel 50 or 51. The trace that connected to one side of R17513 was open.
RCA P46810 CTC195 TUNING P46810 serial 733590298 Unit will not receive channels 51 or above. Channel 50 on down are normal IC U17504(14) is the UHF VHF band switch output for this chassis. There is a voltage change from 0.2 on channel 51 the 11.6 on channel 50 on U17504(14). This voltage change is felt on Q17504 base is only .2 of a volt. The base must change 0.6 volts in order for it to change bands. Q1750(C) has 11.0 volts no if in VHF or VHF mode. (50-51) Unit has a defective Q17504 215496. After replacing the transistor we were able to get the band switching at the Collector of Q17504 to activate in the UHF/VHF mode. Measuring the voltage at the Drain and source of Q17301 we found the same voltage on both again but we still R17309 was cracked. Another 91 ohm resistor was used to correct this symptom.
RCA PS50670 CTC195 TUNING PS50670 Unit will not auto program. Also when auto programming the set will not auto program beyond channel 52. When direct accessing the channel the set takes about 1 to 2 seconds for the picture to appear.  This delay in direct accessing the channel is too high. It should be about 400 milli seconds. Tech needs to initialize the EPROM. This did not correct the symptom. Next the tech needs o enter the alignment parameters of the IF and see that the VCO parameter is 98 and the AFC OFFSET is 24. Next is to exit out of the service mode and disconnect the Chipper Checker. Turn on the set without an antenna connected and select a low band VHF channel from 2 ~ 6 and wait for 10 seconds. Then connect the television. The 10 second wait is so the television will not be trying to fine tune the channel. It will stop trying in that 10 second period of time. Next monitor the Voltage at U16201(12) It must be 3.8 volts. If not, adjust L12302 CCW for 3.8 volts. If the voltage jumps radically replace L12302 part# 215502.
RCA PS52700 CTC195 TUNING PS52700 Unit will not select any channels. The numbers change on the screen but the tuner in the television will not move from the channel it is stuck on. In the TV Guide set-up the tech needs to deselect the items in the menu like CATV box, VCR, DSS, even though the customer has these items. Once the set is working in that mode then the tech can add the peripherals to the product using the (IR. blaster) which plugs into the G link. 
RCA P46810 CTC195 TUNING Unit will not receive channels 51 or above. Channel 50 on down are normal IC U17504(14) is the UHF VHF band switch output for this chassis. There is a voltage change from 0.2 on channel 51 the 11.6 on channel 50 on U17504(14). This voltage change is felt on Q17504 base is only .2 of a volt. The base must change 0.6 volts in order for it to change bands. Q1750(C) has 11.0 volts no if in VHF or VHF mode. (50-51) Unit has a defective Q17504 215496. After replacing the transistor we were able to get the band switching at the Collector of Q17504 to activate in the UHF/VHF mode. Measuring the voltage at the Drain and source of Q17301 we found the same voltage on both again but we still R17309 was cracked. Another 91 ohm resistor was used to correct this symptom.
RCA PS51700 CTC195 TUNING Unit does not tune correctly. When on channel 4 through 13 there is the same channel. It is unknown what the channel is. I had the tech insure that the unit was correctly changing channels in the CATV mode. On U17501(14) there should be a voltage swing from 0 to 11 vdc when selecting 50 then 51. But when measuring the voltages at U17501(5,6,7 &8) we find the voltages at 33 volts no matter what channel the television is tuned to. Unit had defective U17701
RCA PS27600 CTC197 TUNING PS27600 Unit has a problem where all the channels it receives is off frequency. AFT will not pull it in Tech needs to look at the value of the IF VCO in the Chipper Checker menu. This value can be moved up or down as much as 10 digits to see if the effect is will correct the symptom or not. Moving the value of this setting does not change the symptom. 
RCA PS27115 CTC197 TUNING PS27115 serial 723510715P. Unit does not have reception above channel 50. Previous tech from another service center out and resoldered tuner. After tech left and the customer tried to use the set they discovered no reception above channel 50 Q17504(C) . These are band switching transistors and will inhibit the operation of the tuner above channel CATV 50. Unit did have a open Q17504.
RCA PS32500 CTC197 TUNING PS32500 serial # 849631330H Unit has no reception on any channels. The number changes but nothing else on the screen but snow. There is a difference in the amount of back ground noise when a channel is selected to the different bands with in this tuner..  Checked all the TV guide plus setup data found that all was correct. Further hardware checking found the Cathode of CR14115 (location 20 MM) only 4 volts. This is supposed to be the 33 vdc line for the tuner. Measuring the resistance to ground found it to be varying from "0" ohms to 27K while flexing chassis. Removing tuner shield revealed FB17203 (CBA location L19) a ferrite bead next to the tuner shield had a solder splash on it causing a short to the tuner shield and pulling the 33 vdc source to ground. 
PSN PS32500 CTC197 TUNING PS32500 serial 912531023. When running the set over a long period of time the set will go to snow then back to normal after a fraction of a second. The only error code that can be read is error 21. This is not a valid error code. Technician resoldered the tuner grounds without effecting the symptom.  Recommend the tech go back and resolder the PLL and Mixer/Osc U7501, U7301 in the tuner assembly. These are both surface mounted capacitors. The process is to be sure the chassis is totally level, and paint solder flux on both IC's. Resolde the pins by wiping the solder from the chip to the tip of the leg in strokes. Once this is accomplished then the tuner is thoroughly cleaned with flux remover or solvent and a stiff short bristle brush made of natural material. NO PLASTIC BRUSHES!!!!!
RCA PS32500 CTC197 TUNING PS32500 Unit takes too long to direct access channels. Will not aurtoprogram. This delay in direct accessing the channel is too long.. It should be about 125 milli seconds. The tech needs to enter the alignment parameters of the IF and see that the IF-VCO parameter is 98 and the AFC OFFSET is 24. Next is to exit out of the service mode and disconnect the Chipper Checker. Turn on the set without an antenna connected and select a low band VHF channel from 2 ~ 6 and wait for 10 seconds. This allows the CPU to time out and will stop searching for a signal from the tuner. Next connect the antenna to the television and monitor the voltage at U16201(12) It must be 3.8 volts. If not, adjust L12302 CCW for 3.8 volts. If the voltage jumps radically replace L12302 part# 215502. In this test unit we did have a defective L12302.
PSN PS32600 CTC197 TUNING PS32600 CTC197CK Unit does not have high band VHF channels Unit does not have band switching from Low band VHF to High band VHF. There is correct band switching at U17501(17) but no change in level at the collector of Q17503( C). The collector is always -11.5 volts. When tech was indicating there looks like a component missing at coordinates K 19. Checking the voltages at Q17503(B) finds the voltage swing from channe6 to channel 7 is 11.8 to .1 volts. This swing is too far for this PNP transistor. There should only be a .7 volt drop with respect to the emitter. Unit has a defective Q17503. After the transistor was not soldered
RCA PS27600 CTC197 TUNING Unit takes too long for the picture to lock in on channel when direct accessed. Also auto programming does not work. When measuring U16201(12) we find the voltage to be 5.3 volts. It should be about 2.9 volts. This voltage is the AFT crossover voltage. To set this correctly you must disconnect the antenna and direct access a local channel strong enough to receive but not strong enough to receive without an antenna. Direct access this channel and wait for 10 seconds then connect the antenna. Measure the voltage at U16201(12) It should be 2.9 volts. If not adjust coil L12302 so the voltage at (16201(12) is approximately 2.9 vdc. If this voltage can be achieved then try to autoprogram the unit. In this unit the original voltage was too high and was brought back to normal with a small tweak of L12302. Unit is functioning fine.
RCA PS27500 CTC197 Tuning Unit will not get channels from 7 to 13 plus most of the other CATV channels, yet the low band VHF is perfect. Checking the output of U17501(17) and switching the channel from 6 to 7, the voltage will swing from  11.7 volts on channel 6 to "0" volts on channel 7. But when checking the voltage at Q17503( C) we found the voltage to be always -11.6 volts no matter what band we were on. It should have swung to a +12 volts on high band VHF. Transistor Q17503(B) never changed either. Base and emitter voltage was always the same. But the transistor did not measure shorted. However replacing the transistor corrected the problem. Part number 215496. This is a PNP surface mounted transistor.
RCA PS27500 CTC197 Tuning Unit will not get channels from 7 to 13 plus most of the other CATV channels, yet the low band VHF is perfect. Checking the output of U17501(17) and switching the channel from 6 to 7, the voltage will swing from  11.7 volts on channel 6 to "0" volts on channel 7. But when checking the voltage at Q17503( C) we found the voltage to be always -11.6 volts no matter what band we were on. It should have swung to a +12 volts on high band VHF. Transistor Q17503(B) never changed either. Base and emitter voltage was always the same. But the transistor did not measure shorted. However replacing the transistor corrected the problem. Part number 215496. This is a PNP surface mounted transistor.
Proscan PS36500 CTC197 tuning Unit has no UHF or CATV reception above channel 50 on the main tuner. However the PIP tuner works fine Checking the bandswitching at U17501(14) finds the bandswitching is fine when switching from CATV channel 50 to 51, but when checking Q17505(C ) the voltage is always 11.5 volts. Q17503(B) swings from 0 to 11.2 volts during bandswitching. Transistor Q17405 is defective. Part # 231534. This is a digital transistor and it checked open using the diode check mode on a Fluke 77.
RCA P46812 CTC195 TURN-ON INOPERATIVE P46812BL serial 740491910 Unit will not turn on. After the set is turned on the set will attempt to turn on but attempt the action only 3 times then stop. Tech has checked the horizontal driver collector for correct drive with the Horizontal output collector disconnected. Asked the tech to see if the set will develop high voltage with the anode pulled from flyback transformer. It does not! Next check to see if there are any secondary short circuits on the +180, +26, and +13 volt lines. No shorts circuits evident. Note: the +13 was 90 ohms, this is normal because of 2 180 ohm resistors in parallel with the +13 supply to ground. This condition appears to be a defective flyback. 
RCA PS46820 CTC195 TURN-ON INOPERATIVE PS46820BL serial 725591904. CTC195DA Unit will not turn on. All secondary are running normally. CR14106(K) =165 volts in standby, CR14107(K) =16 volts  There is no output B+ from U14107 even though JW12410 was removed. There should be a 12 and a 5 volts supply from this IC. U14701 is defective
RCA PS32500 CTC197 TURN-ON INOPERATIVE PS32500 serial 903431260 Unit will not turn on. Unit does not have any action of LED's on front. U13102(8) the EPROM we find 5 volts but the reset on the CPU- U13101(51) finds it running at (0) volts instead of 5 volts. Micro is stuck in reset. Measuring the voltages at the secondary of T14101 finds that all the voltages at each diode is correct with the exception of CR14107(C) They should be 15 volts but it was only 8 volts. Checking the voltage at the filter C14106 finds the voltage is "0" volts. There was a hairline separation in the trace between CR14107 and the High side of C14106. 
RCA PS36700 CTC197 TURN-ON INOPERATIVE PS36700 serial 933631436 Unit will not turn on.  Television has all of the necessary voltages at the System control and standby supplies. U13101(19) never goes high when the power is pressed. Unit cannot be forced on By pressing and hold menu, Then power then volume up then release
PSN PS32500 CTC197 TURN-ON INOPERATIVE PS32500 serial 851531125. Unit t will run for a while until the set is turned off. Once off then turned on again the set will not turn on. No LED illumination or auto start attempts will occur until 30 to 40 seconds of wait time. After this wait time the set will turn on just fine. No other malfunction. Error codes in tech menu indicate error 16 stuck bus. Checking the "Run" Data and clock signals during the power up sequence we found the set did not correctly start up with clean signals. There were signals within the 5 volt peak to peak pulse train that were lower than the bulk of the pulse train. By substitution U18100 F2PIP chip was causing the trouble.
PSN PS36500 CTC197 tURN-ON INOPERATIVE Unit will not turn on. Pushing the power button makes (U13101(19) go high, but he TV still will not turn on. While checking the "RUN" data/clock lines on U13101(3&4) we discovered the data line was running at 1.9 volts peak to peak not the 5 volts pp. Unplugging the TV and measuring the resistance to ground on the U13101(4) "RUN Data line finds it to be 1.8K verses the clock line  (3) at 13K..  Measuring the resistance to ground at each peripheral the uses the "RUN" data line we found the resistance drop to 745 ohms at Q18102(c ). Removing this service mounted transistor caused the solder land for the collector to go to 13K. Replacing the device corrected the trouble. Part # 219412. This is a NPN SMD transistor.
RCA PS61700 CTC195 TV Guide plus PS61700 serial 8495513677. Unit has the wrong channel in up when "Channel line up" or "View information" selected. The incorrect television channel is displayed relative to the program material  Tech needs go set up the channel map sequence on this television so that it matches the 
RCA P52920 CTC195 TV Guide Plus The TV guide plus will turn on but the On Screen Display is not in sync with the display video. However the OSD for the television set up menu is properly synchronized. Initializing the TV guide PLUS by entering the TV guide Plus setup menu and pressing "GOback" twice, then "TV" will not correct this symptom. Will not enter the TV guide set up menu. I had tech go into the rear of the set and inspect the connectors that interface the TV guide Plus module to the main chassis. It was discovered the connector J26403 was not fully seated in the GEMStar module. Reseating the connector corrected the symptom
RCA F32645 CTC197 TV GUIDE PLUS F32645 Serial 520287768 Customer operates television on a satellite system. He is too far from the city to receive local television and is not supported by CATV. Customer does not want TV Guide to operate. There is no was to disconnect the TVG from the set that Thomson will approve, but the tech can enter and illegal zip code into the system and cause it to shut down. And illegal zip code could be 99999. This should stop it from trying to download anything.
RCA PS32600 CTC197 TV GUIDE PLUS PS32600 serial 912631148 TV guide plus does not load data.  In the TV guide set up mode the customer answered yes to the VCR. He should not unless he is using their blaster to communicate to the VCR. Cust does not have the IR blaster. So the answer to all the question in the TV guide plus set up must all be "NO". I order for the tech to do this he must enter a zip code of 99999, then finish the setup process. Wait for 5 minutes, at which point the set will default to an error condition due to the illegal Zip code. Then enter the correct Zip code and wait for the next down load time.
RCA PS32700 CTC197 TV GUIDE PLUS PS32700 serial 836531479. Unit will not download the TV guide Plus info to make the VCR record I had tech reset the TV guide module by entering the Guide plus setup program the hitting the "Go back" button on the remote then hit the "TV" button twice. This clears the old data in the system and starts a internal test program. It will check the ROM, RAM, VBI, and G-LINK. All passed except the VBI and Glink. The VBI did not pass because it was not on the host channel. The Glink did not pass possibly because the Glink cable is defective or a bad IR blaster at the end of the G-link cable. The G-link is necessary for VCR programming because the television will turn on the VCR via the G-link cable and IR blaster, make the VCR select the channel, and place it in the record mode. Apparently the TV guide plus module was connected incorrectly. The connector J23905 was connected to the front video line input. There does not appear to be any cable from J23905 to J26401. Tech will need to hard wire a jumper from J23905(1) to J26401(2) J23905(2) to J26401(1) Note: these are opposite from each other.
RCA PS36500 CTC197 TV GUIDE PLUS PS36600 serial  846331490.  Unit does not always download TV guide plus data. Customer has a VCR, and is on cable TV The customer has the VCR connected in series with the R.F. path where the CATV from the street goes into the VCR then out of the VCR to the Television. Customer must watch the VCR on channel 3. This is not the best hook up of the VCR in this application. When used in this manor the customer must used the IR blaster that came with his television. This way the TV will control the VCR through the IR blaster and the TV will download the Gemstar data by using the VCR tuner. One drawback from this configuration is the VCR needs to be on all of the time, and the TV will always be on channel 3.
RCA PS36500 CTC197 TV GUIDE PLUS PS36600 serial 846331490. Unit does not always download TV guide plus data. Customer has a VCR, and is on cable TV The customer has the VCR connected in sderies with the R.F. path where the CATV from the street goes into the VCR then out of the VCR to the Television. Customer must watch the VCR on channel 3. This is not the best hook up of the VCR in this application if the customer wants to use TV Guide plus. The signal must be split with a 2 set coupler where the television receives an uninterupted signal from the cable and the VCR will receive the the other output from the Coupler. The television must be fed the output of the VCR using the composite video and left / right from the VCR using the auxilery inputs of the television. The purpose is so when the television goes to download TV guide plus data it will receive an unintrupted feed from the host channel. If the VCR were left on, and not on the host channel the set will not update the program guide, thus causing a fault in the down load of the information. 
RCA PS36700 CTC197 TV GUIDE PLUS PS36700 Will not down load the TV Guide plus data I asked the tech to enter the TV GUIDE plus set up mode and read me the options in the set up dialogue. When the tech got to the part of the set up that discussed "Do you have a VCR?" It had been selected and it was available on Video 1 only. Unit has TV Guide set up incorrectly. I had the tech enter an illegal zip code (99999) and tell the set up the No DSS, no VCR, and No cable box is present. The illegal zip code will cause a auto reset of the TV GUIDE Plus module and will remove it's hold on the chassis tuner. This corrected the problem. Now the tech will need to reset up the TV GUIDE PLUS correctly.
RCA PS36600 CTC197 TV Guide Plus Unit does not always download TV guide plus data. Customer has a VCR, and is on cable TV The customer has the VCR connected in sidewise with the R.F. path where the CATV from the street goes into the VCR then out of the VCR to the Television. Customer must watch the VCR on channel 3. This is not the best hook up of the VCR in this application if the customer wants to use TV Guide plus. The signal must be split with a 2 set coupler where the television receives an uninterrupted signal from the cable and the VCR will receive the other output from the Coupler. The television must be fed the output of the VCR using the composite video and left / right from the VCR using the auxiliary inputs of the television. The purpose is so when the television goes to download TV guide plus data it will receive an uninterrupted feed from the host channel. If the VCR were left on, and not on the host channel the set will not update the program guide, thus causing a fault in the down load of the information. 
RCA P46920 CTC195 vertical P46920BL 833641250 Unit has vertical centering off and the there top is spread out. Bottom is pulled up  This is a condition of a missing 13 volt supply from the Cathode of CR14703. Measuring the voltage at the load side of R14517 we had 8 volts but the Load side of the same resistor we only 5.9 volts. The tech need to check/replace CR14703 and R14705 a 1 ohm 11/2 watt resistor. R14705 was open.
RCA PS61700 CTC195 vertical PS61700 serial 8511510376 Unit has sever bottom vertical fold over. Vertical scan is 5 inches short with the bottom pulled up. The top of the picture has full normal sweep. The OSD is very unstable and bounces severely. Unreadable to try to access the tech menu. Measuring the voltage at the vertical output U14501(5) is running at 23.5 volts. It should be 13.5 vdc. Checking the B+ at the CR14703(K) & R14705 1 ohm 1/2 watt resistor. Unit had an open & R14705 1 ohm 1/2 watt resistor.
RCA PS61700 CTC195 vertical Unit has sever bottom vertical fold over. Vertical scan is 5 inches short with the bottom pulled up. The top of the picture has full normal sweep. The OSD is very unstable and bounces severely. Unreadable to try to access the tech menu. Measuring  the voltage at the vertical output U14501(5) is running at 23.5 volts. It should be 13.5 vdc. Checking the B+ at the CR14703 & R14705 1 ohm 1/2 watt resistor
PSN PS36500 CTC197 VERTICAL PS36500 Unit has no vertical sweep. The horizontal line is elevated 2 inches above center. Monitoring the yoke voltage we found 23 volts. Also the 13 volt supply was at 22 volts. However when disconnecting the vertical yoke winding the 13 volt voltage return to normal Checking the vertical output for damaged or burnt components found nothing. But when heating the area around the T-4 chip U16201 we found that components in the area where vertical drive comes from full sweep returned. Spot heating of C14501 & C14503 caused the vertical sweep to return. Removing the capacitors and cleaning the component adhesive the capacitors and Board are defective
PSN PS36700 CTC197 VERTICAL PS36700 Unit has vertical over scan and the picture is tilted. Tech needs to know where the parameters are that control this values. Suggest the tech get into the customer menu and select screen. Once in the screen menu select Picture tilt. Adjust PIX tilt so the image is level. Next Enter the tech menu and select the parameter 10 & 11or vertical centering and vertical size. Adjust for normal scan and turn the set off. This action will store the values. 
  PS36605 CTC197 vertical Unit has weak vertical sync lock. Horizontal OK Horizontal and vertical sync is extracted internally in U16201. The video must be a  minimum of 1 volt pp measured at U16201(38). This television was only 700 mv. However at the C12710(minus) we had 1.1 volts pp video, where the other side we only had 0.7 volts. Unit had defective Capacitor. C12710
RCA F36670 CTC197 vertical Unit made a loud squeal in the back of the set then the vertical sweep became very distorted. The bottom of the picture was pulled up and the top very stretched. Tech needs to check the presence of the "Half voltage supply" a 13 volts supply at the flyback. Unit had a shorted CR14703 =207878(large) and a open R14705= 829A10. This supply provides the necessary bias for the input of the vertical output IC.
PSN PS36500 CTC197 video PS36500. Serial # 927631446 Unit has intermittently looses video but still has sound. Does not have the symptom if using the External video input.  Suggest the tech look at the Input switching area for the trouble. Assuming the set never looses the video when running in the External input mode, and the set still has sound it logically limits the possibilities to The input switch U26901. This IC is responsible for the routing of 4 different video sources from 4 different inputs. If everything works in the Video input mode and in the tuner mode there is no video then It would suggest the trouble is located in the Switching IC. (Based on the techs initial observation that the set had audio in the tuner mode. 
PSN PS36700 CTC197 Video Picture contrast is abnormal in a band that covers the bottom 1/3 of the screen.  This can be seen in the oscilloscope when viewed at U18101(41) when looking at the vertical rate 2 milli seconds. Pattern generator was set to gray scale vertical bars. Comparing the video at U18101(51) to pin 41 the difference was significant. Unit has an artifact that matched the window position for the PIP frame. It caused the transparent horizontal band at the bottom 1/3 of the screen. It was on all inputs. This was caused by the F2PIP chip. Part # 248640
PSN PS27500 CTC197 video 1 missing Unit has no video when using the video 1 input. We were able to track composite video from the video input of  U26901(3), however nothing on the output side U269011(13). Monitoring composite to the input of the FPIP U18100(51) is OK. But there was no output on Pin 41.  Oddly enough when we fed video into the Video 2 it worked as expected. Also Tuner mode operated fine. On other significant symptom not complained about was this TV did not have video in the S-video input. We could trace the Luminance from the S-video input to each side C26916, but nothing at he Input of IC18101(3). It was discovered that C18105 was open. Replacing the capacitor corrected both symptoms, both S-video and Video 1. The explanation of this phenomena was because the S-video input was essentialy open because of the open capacitor the F2PIP  automatically switched to the input selector to S-video instead of video 1. The design of the F2PIP chip senses activity on U18101(3) and it automatically switched inputs. This input was unterminated and noise got into the inout falsing the internal switch.
RCA P62912 CTC195 Video Missing Had an RCA projo with a no video symptom. The chassis is a PTK 195 CT. OSD, sound were all there.  After checking the area of U26901 and U18100 (based on a previous post on this site), I noticed cracks on the shield legs of the shield that covers U18100. After removing the shield, resoldering the legs, and then resoldering the shield, the video returned. Shades of CTC175 to 187. So watch those shield grounds.  Thanks to Ron
PSN PS27500 CTC197 VIDEO NOISE PS27500 serial 849631568. Unit has heavy black and white horizontal dashes on the screen that are 3 to 4 inches long, that cover the entire screen. It does have On screen display and menu functions.  I hade the tech check the luminance out of U18100(41) We had a saw tooth waveform nearly 1 volt peak to peak at 3 micro seconds period. This could also be seen at the input U18100(51). However the Output of the video switch U26901(13) was clean video. It was discovered that video was clean up to BPF circuit after Q18110(E) Capacitor C18101 was broken.