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. Replaci