BRAND MODEL CHASSIS KEYWORD Symptom Cure
RCA F32645 CTC203 Afterglow Customer complaint is Afterglow. This is a normal condition. It is not an indication of impending failure. RCA does not incorporate any bleeder resistors in there high voltage systems because of power conservation. Most vendors no longer use bleeder resistors
RCA F32645 CTC203 AUDIO, none F32645 serial 925431133 Set plays fine but audio missing. If cabinet is moved or hit the audio may appear. Symptom is present whether the set is in the tuner or external input mode. J11901(Speaker connector on chassis) had insufficient solder between the pins and the board. Poorly soldered. Resoldering corrected the audio defect.
RCA F32645 CTC203 AUDIO F35645 Unit has no audio when using the tuner. Audio OK when using the external audio input. Checking U12101(49 and 6) we have about  7 and 6 volts respectively. When observing the area around the FM detector coil L12303 we find the capacitor C12309. After an attempting to solder the device it fell apart.. Replacing C12309 cures the symptom.
RCA F36645 CTC203 AUDIO, none F36645. Unit has no audio. Through speakers or line out. When using the line input, we still have no audio. Monitoring U11601(8 & 7) we find normal tuner audio with an oscilloscope. No audio appears at U11602(1 & 7) This is the R&L variable line level audio output IC from two internal OP AMPS. Both B+ voltages on U11602(8 & 4) were low 1.6 & -2.2 volts respectively. Unit has the source 12 and -12 volts sources at current limiting resistors R11625 & R11626. C11631 was shorted. Part number 222008
RCA F36665 CTC203 AUDIO, intermittent F36665 serial 90346191 Unit has intermittent audio. Only looses audio in the tuner mode. Aux input for audio is always stable and never drop out. Verifying what circuits function is just as important as what in not working. By checking the External inputs indicated the trouble more than likely is in the Sound I.F. Demodulator or stereo decoder. Closer inspection of the Audio demodulator finds a capacitor that is mechanically unstable. Simply brushing across the capacitor with the oscilloscope probe create a very loud reaction in the speakers. In the attempt to resolder the capacitor C12309 falls off the board in pieces. This capacitor is in the ground return of the 4.5 MHz Discriminator coil. Tech needs to replace C21309 part # 197600
RCA F36665 CTC203 AUDIO F36665 Unit has intermittent audio. Only looses audio in the tuner mode. Aux input for audio is always stable and never drops out. It is believed that the Sound I.F. Demodulator is the trouble because of no less than 8 other reports of the same trouble C12309 This capacitor is in the tank circuit of the 4.5 MHz Discriminator coil. Tech needs to replace C12309 part # 197600 but before replacing be sure to clean off the area under the capacitor. There is a small glue dot that appears to be too large. When the SMD capacitor is put in place the component squeezes the glue around the capacitor. Hence the glue touches each end of the capacitor. In other words clean away all the glue from the board. .
RCA F36665 CTC203 AUDIO F36665 Unit has intermittent audio. Only looses audio in the tuner mode. Aux input for audio is always stable and never drop out. This indicated the trouble is in the Sound Demodulator or stereo decoder. Freezing of the Audio demodulator circuit allows audio to return. Heating the same area causes audio to fade away. Minimizing over spray from freeze mist by saturating a Q-Tip with Freeze compound we were able to isolate a capacitor in the Sound I.F. Demodulator. The capacitor is C12309 and is part of the Tank circuit for the 4.5 MHz Discriminator coil. Tech needs to replace C21309 part # 197600
GE 35GT740 CTC203 Audio,  none Unit has no audio to the audio output IC. When monitoring the Input to U1901/1900(4), we had no audio. Further checking at U11602(7 &1 ) we also had no audio. Checking B+ at the same IC pins 8= + 8.9 volts & pin 4 = +3 volts. Pin 4 should have been (minus)- 8 volts. Checking the source of the -8 volts we found a missing voltage at CR11505(A). CR11505(K) had a minus 11 volts on it. Diode was open. Located at 16D on the main CBA Part number 232709. This is a SMD part.
RCA F32645 CTC203 auto program  set wont find any channels when auto programed It will direct access all channels but it takes 4 seconds to lock in. It will manually add channels but when scan up/down slow to lock in. L12302 will adjust to +3.9 volts at U12101(12). Some detailed inspection of the chassis we found that C13114 a SMD was not soldered on one end. Touching up the solder corrected the trouble.
RCA F27665 CTC203 Dead F27665 serial 910631046. Unit is completely dead. When changing the regulator Q14101 It will immediately short out again as soon as power is applied. When connecting the television to a variac and slowly raising the A. C line voltage the power supply secondary will develop an excess of 200 vdc at the collector of the Horizontal output Q14401(C) at just 38 volts A.C. This power regulator is not receiving comparison feedback voltage from the error amp U14102. Tech needs the replace the following components; Q14102(147665), Q14103(232218), Q14101(224223), U14102(231525), & U14101(223653). After all these parts are installed then start up the set with 30 volts AC while monitoring the secondary B+ for an over voltage condition. In this case, the secondary voltage was about 56 volts at the collector of the horizontal output. Running the AC up to 120 volts delivered the normal 140 vdc to Q14401(C).
RCA F36645 CTC203 DEAD F36645. Unit is really dead. No B+ from the secondary of the power supply. Raw B+ measured 169 vdc at Drain of Q14401. Nothing measures shorted in the secondary or primary of the power supply. A quick check around the Soft start circuit in the power supply finds an open R14103 a 1 meg 1/2 watt resistor open. Replaced resistor and all is well.
RCA F27665 CTC203 Dead F27665 serial 924411712 Unit makes a chirping in power supply. No 5 volts from the output of U14103(3) and no 14 volts to U14103(1) R14124 open. When resistor was replaced the television operated for 1 hour the opened resistor again. Power supply began to chirp again. We applied an external 5 volt source from a D.C. power supply. Unit was pulling about 3 amps of current with the voltage at 1 volt. This is far too much. Unplugging the Gemstar module cleared the short. Now current was 120 ma at 5 volts. A short exists in the Gemstar module. The short is on the 5 volt line and could be clearly traced to the set of components on the anode side of CR26401. Checking very close to the anode of this diode we found the wire was not trimmed back enough before it was bent over in the hole. There was only .015 inch clearance from the solder land of CR16401(A) and a large ground plane. Apparently the tip of the wire was .019 inch and touched the edge of the ground plane. Removing the solder, trimming the excesses wire from CR26401(A), and resoldering it corrected the short circuit on this module.
RCA F32645 CTC203 Dead F32645 Unit will not turn on. Tech noticed the U14104, the 12 volt regulator has no output. when the Power button is pushed. The IC in question U14104 is a switched 12 volt regulator. The output will not appear until the chassis is turned on or in other words U13101(19) must go High (4.9 volts) to turn on Q14105, then turn on Q14104, in order for the regulator, U14104 to turn on. Tech needs to concentrate on the EPROM and whether it is getting polled from the microprocessor. At the instant that power is applied the EPROM must have activity on the Data and clock lines U13102(5 & 6) The communications activity should last approximately 250 ms right after power is applied, then stop. In this unit the activity never starts. In fact both lines were low, 1.8 volts each. The clock(Y13101), Reset, B+ and front panel control appear normal. When we float U13102(5 & 6) the CPU began to generate clock and data pulses on U13101(3 & 4). This suggests the EPROM is at fault. I would hold onto the original EPROM just incase that we need to extract the old data and install it into the new EPROM. EPROM corrected the failure. We were not able to read the data from the old EPROM
RCA F32645 CTC203 Dead F36645. Serial 909531095 Unit will not turn on. The secondary of the supply are coming up. The set cannot be forced on by pressing & holding the "Menu" button & Power, then Volume up There are cracks at location N7 of the circuit board A mounting screw Next to JW118. There are 7 hairline traces that are cracked. This set cannot be fixed in the home. Due to the fact the traces are broken on the rail side of the chassis, repairing them will be very difficult at best. Future service on this chassis my compromise the jumpers integrity, which need to be placed on this chassis, by simply sliding chassis in & out of the rail assembly. This chassis may very well be scrap.
RCA F27665 CTC203 Dead F27665 serial 910631046. Unit is completely dead. When changing the regulator Q14101 It will immediately short out again as soon as power is applied. When connecting the television to a variac and slowly raising the A. C line voltage the power supply secondary will develop an excess of 200 vdc at the collector of the Horizontal output Q14401(C) at just 38 volts A.C. This power regulator is not receiving comparison feedback voltage from the error amp U14102. Tech needs the replace the following components; Q14102(147665), Q14103(232218), Q14101(224223), U14102(231525), & U14101(223653). After all these parts are installed then start up the set with 30 volts AC while monitoring the secondary B+ for an over voltage condition. In this case, the secondary voltage was about 56 volts at the collector of the horizontal output. Running the AC up to 120 volts delivered the normal 140 vdc to Q14401(C).
RCA F27665 CTC203 Dead F27665 serial 924411712 Unit makes a chirping in power supply. No 5 volts from the output of U14103(3) and no 14 volts to U14103(1) R14124 open. When resistor was replaced the television operated for 1 hour the opened resistor again. Power supply began to chirp again. We applied an external 5 volt source from a D.C. power supply. Unit was pulling about 3 amps of current with the voltage at 1 volt. This is far too much. Unplugging the Gemstar module cleared the short. Now current was 120 ma at 5 volts. A short exists in the Gemstar module. The short is on the 5 volt line and could be clearly traced to the set of components on the anode side of CR26401. Checking very close to the anode of this diode we found the wire was not trimmed back enough before it was bent over in the hole. There was only .015 inch clearance from the solder land of CR16401(A) and a large ground plane. Apparently the tip of the wire was .019 inch and touched the edge of the ground plane. Removing the solder, trimming the excesses wire from CR26401(A), and resoldering it corrected the short circuit on this module.
RCA F32648 CTC203 Dead CTC203), serial # 109423123.  Before repair it was completely dead, with no secondary voltages.  The SMPS had raw B+, though no PWM switching was occurring.  Problem turned out to be an open R14103, a 1MEG resistor. This is the same culprit as another set listed on this CTC203 page. Though, in the set I was working on, the resistor was an 1/8W and not a 1/2W.  I don't have a schematic for the set (I drew up the portion I needed to do the repair), so I'm not sure which is correct.  According to my calculations, even if the resistor had the full raw 170V B+ across it, it still would only dissipate 29mW.  From that, it would seem that it should indeed be an 1/8W.  But, just to be safe, I replaced it with a 1/4W I had handy. Thanks to David Wakelee
RCA F32644 CTC203 Dead Unit will not turn on. Has all B+'s with the exception  of the switched 12 VDC from U14104. This unit has the Gemstar that incorporates the main system controller.  Checking the "RUN" data & Clock lines, at J13104(12 & 13) it was found the data line (pin 12) was only 200 ohms above ground where the clock line was at 11K.  Problem was caused by a leaky capacitor on the Data line near the main modular tuner. C11612 a 47pf surface mounted capacitor was leaky.
RCA F27645 CTC203 Dead Checking the stand by power supply voltages we found that the SMPS was not running. Q14101 was shorted. Tech replaced the shorted device but it shorted again after the power was applied. Tech should have changed the following Q14101(244223), Q14102(147665), Q14103(232218). Remove all these components and static check all other component in the power supply. All unusual reading the tech must remove the component and check out of circuit.  Another component was discovered shorted, CR14102(198589). Applying A.C. power through a variac, beginning at 10 volts A.C. then increasing the voltage while monitoring the total current. The secondary output voltages reached normal levels at 76 Volts A.C.  Replacing all these components restored operation.
RCA F27442 CTC203 Dead Has audio / no video except when PCB is twisted. 
 

Found horizontal was shutdown due to cracked solder rings around cr14401. Check all solder connections in this area. Thanks!!!
Chuck Kigar
Kountry Konnection Electronics Service
Memphis, MO.
RCA F27645 CTC203 Dead Checking the stand by power supply voltages we found that the SMPS was not running. Q14101 was shorted. Tech replaced the shorted device but it shorted again after the power was applied. Tech should have changed the following Q14101(244223), Q14102(147665), Q14103(232218). Remove all these components and static check all other component in the power supply. All unusual reading the tech must remove the component and check out of circuit.  Another component was discovered shorted, CR14102(198589). Applying A.C. power through a variac, beginning at 10 volts A.C. then increasing the voltage while monitoring the total current. The secondary output voltages reached normal levels at 76 Volts A.C.  Replacing all these components restored operation.
RCA F36450 CTC203 Dead Unit will not turn on. Power supply is running, all stand by supplies are OK. Gemstar module has B+, and no buttons on keyboard are stuck When checking the "Must Haves" on the Gemstar module we found the Reset line to the Gemstar was stuck low at J13104(7) . Futhure isolation of the reset circuit found that Q13503(B) was at 0.67 volts. This caused the device to saturate. The reason the Base was so high was because C13504 was leaky. The capacitor was replaced and the set was returned to normal operation. The capacitor is a 0.1mfd @25 vdc SMD Part # 222008
RCA F36645 CTC203 FLICKERING F36645 Tech say the set has a rolling, and flickering pattern in the video. Symptom does not show up in the video input mode. Customer is on CATV.. The flickering appears to be adjacent channel interference. If a another source of RF is used like a VCR or DVD player is used the flickering is still evident. The Tuner appears to have a problem with the PLL IC U17401. Replacing the IC cured the trouble. Part number 231519. NOTE: Caution should be taken on replacement of this IC. It is not recommended to use solder wick on this chassis because the traces are so thin, and the adhesive on the trace looses it's adhesiveness when heated to temperatures 600 degrees. It is best to clip the legs of the IC, close to the body with precision cutters. The remove the body of the chip. Then individually remove each leg of the old IC. Using solder flux in this process will help in removing the old legs and facilitate the installation of the new IC.
RCA F32645 CTC203 Horizontal F36645 Unit has sever horizontal overscan. Tech replaced Flyback and regulator Without effecting symptom. Measuring the voltage on the cathode of the Pin modulator diode CR14801. All B+ measurements are Ok from the Switch mode Power supply. Measuring the voltage at CR14801(K) was only 1.3 volts. Resistance to ground was only 15 ohms. CR14801 shorted. Suggest replacing CR14801 & C14800.
RCA F27645 CTC203 Horizontal collapse Unit will turn on but no horizontal sweep. Horizontal pulse at Q14401( C)  was running at 20 microseconds off time. This TV had a bad yoke "S" capacitor was a .41 / 250 volt capacitor. C14403 part # 214752.
RCA F27615 CTC203 MECHANICAL NOISE F27615 serial 915530627 Unit has a buzz emanating from the deflection yoke. Pressure can be applied to the yoke to minimize the buzz but not low enough. Unit needs the CRT. The buzz is from loose laminations in the deflection yoke. No amount of tightening or gluing of the wires in the yoke assembly would reduce the buzz sufficiently do the customer could not hear it. Thomson was called and we obtained a VLS number for CRT approval.
RCA F36665 CTC203 No High Voltage  No high voltage for at least 02-30 minutes after the set was turned on. Check for cold solder on and near L14401 next to the Horizontald driver transformer (T14301)
RCA F27645 CTC203 Dead F27645 serial 945432183 Unit will not turn on. When using the Chipper Checker an Error code of 16 is indicated the run I2C bus is stuck to logic "0" Place a jumper between Q14104(E & C) This will turn on the Switched 12 volts and apply power to the all the peripherals. Next, carefully remove the pins of U13101(3 &4) and apply power to the set. Both traces on the data and clock must be 5 volts. If it is 5 volts then no excessive loads on the Data or clock lines exist. In this case U13101(3) was 1.9 volts. This indicated that something that connected to the Data line was loading it down. All ICs were isolated by removal of the data and clock pins. It was discovered that once capacitor C17416 part # 214029 was removed the load went away. It is a 43 pf capacitor. The mystery is this capacitor did not measure leaky. It is believed the glue that held the device in place became conductive and causes the trouble.
RCA F27665 CTC203 Dead F27665 serial 918532330 Unit will not turn on. When using the Chipper Checker displays Error 16. This means the Run I2C bus is stuck to logic "0" Place a jumper between Q14104(E & C) This will turn on the Switched 12 volts and apply power to the all the peripherals. Next, carefully remove the pins of U13101(3 &4) and apply power to the set. Both traces on the data and clock must be 5 volts. If it is 5 volts then no excessive loads on the Data or clock lines exist. In this case U13101(3) was 1.9 volts. This indicated that something that connected to the Data line was loading it down. All ICs were isolated by removal of the data and clock pins. It was discovered that once capacitor C17417 part# 214029 was removed the load went away. It is a 43 pf capacitor. C17417 part 214029
PSN PS36700YX2 CTC203 Dead All stand by voltages are normal. When connecting chipper checker to the chassis an error code is listed claiming a Watch Dog Error has occurred. This chassis is a CTC203CJ4 It is unclear what the Watch Dog error actually means in a hardware environment but the Gemstar module was changed and it corrected the trouble. NOTE. It should be said this model did not have a U13101 on the chassis. This model incorporates the main system control and Gemstar module in the same device. Part # 252670
RCA F36665 CTC203 No video Audio present but no video. Troubleshooting Involved: Checked U12101(42) for video signal.  Nothing present. Found U12101 defective  (RCA 241266), LA7612N
RCA F32649 CTC203 No video Audio & OSD present but no video. Checked U12101(42) for video and it was O.K.  Check for video @ U26902(6).  None present Found C26903 pn#214729,a 22mfd@35vdc C26902 pn#220998, 1 mfd@100vdc capacitor physically damaged, located on the analog comb board, They are he coupling capacitors for the video input to the combfilter. Also coil L26901 pn# 244249 open and was also replaced.
RCA F32645 CTC203 Power supply F32645 Serial 931624156. Unit has a low pitch growl in the stand by mode. It disappears when it is running. All stand by voltages are normal but. Off of pin 9 of T14101, locate R14105. Change it's value from 10 ohms to 68 ohms. This is a factory bulletin number TV99-002
RCA F32665 CTC203 Power supply F32665 Unit has a high pitch chirping When the television is running. Suggest the tech remove the Flyback transformer and reposition the ground lug so to increase the mechanical pressure on the core of the transformer to the bracket. This preloading of the bracket and core has stopped many vibrations or mechanical squeals from this transformer..
RCA F32649 CTC203 Raster, none Unit will not display  any raster unless the G2 in increased. No OSD, No PIP, No Raster. Has sound and Luminance to the T4 chip U12101(38) Monitoring the ABL line from the flyback to the T4 chip U12101(28) we found the voltage at that point to be "0" volts. It should have been around 6 to 7 volts. Resistance from U12101(28) to ground was 950 ohms.  At the low side of resistor R14706 was less than 2 homs. SG14702 was shorted. Bypassing the Spark gap corrcted the problem.
RCA F32645 CTC203 Retrace lines When running the set the unit will have a bright screen with retrace lines. Unit shuts down. Measuring the G2 voltage at the CRT was approx 278. While measuring the voltage the picture became somewhat normal. CRT cathode voltages were under 90 volts each. This is way too low. Suggested the tech try to locate the Luminance buffer transistor Q12904. It was shorted E to C Part # 215496.
RCA F27616 CTC203 Shut Down F27616 serial 921436035 Unit is dead. Will power up But shuts down. Checking all the stand by voltages we find everything normal. When turning on the set the run supply never get the chance to go up before it shuts down. Using the Chipper Checker it reports an Error 11 which would mean a Stereo decoder failure. Checking the B+ at the U11601(22) always measures "0" volts measuring resistance. At this point it was decided to force on the 12 volt regulator by jumping Q14104(E & C) then apply power. As soon as power was applied a small wisp of smoke came from R11827, a current limiter for the 9 volt switch Q11603. It was quickly discovered there was a load on the emitter side of Q11603. C11615 was shorted Device is off of U11601(22). C11615 is a .1 mfd part number is 222008
RCA F32645 CTC203 Shut Down Unit will not turn on. If the chassis is twisted the set will turn but only if the chassis is twisted  and power is applied. Problem was caused by a ring fracture around a pin connection on U11601(10).
RCA F27616 CTC203 Shut Down F27616 serial 921436035 Unit is dead. Will power up But shuts down. Checking all the stand by voltages we find everything normal. When turning on the set the run supply never get the chance to go up before it shuts down. Using the Chipper Checker it reports an Error 11 which would mean a Stereo decoder failure. Checking the B+ at the U11601(22) always measures "0" volts measuring resistance. At this point it was decided to force on the 12 volt regulator by jumping Q14104(E & C) then apply power. As soon as power was applied a small wisp of smoke came from R11827, a current limiter for the 9 volt switch Q11603. It was quickly discovered there was a load on the emitter side of Q11603. C11615 was shorted Device is off of U11601(22). C11615 is a .1 mfd part number is 222008
RCA F32645 CTC203 Shut Down This chassis would shut down intermittently but will turn back on again in a few minutes by itself. Note: When the unit came back on again the OSD would not display as it normally does when the set is turned on. Problem was caused by in intermittent Primary winding in T14301 horizontal Driver transformer. When removing the transformer from circuit board on of the pins for the primary winding was very loose.
GE 31GT720 CTC203 SHUTDOWN Unit will turn on but shut down and cycling on an off about 6 to 8 times. When forcing the television on, by pressing the Menu(hold), Power(release), then volume up(release menu & vol up), the set will turn on and stay on so we can check the error codes. Error codes are 198 in P1, P2, P3. These error indicated a Tuner DAC bus error.  Futher checking found a resistor that connected the tuner to data line was not providing the necessary data communications to the tuner. Resistor R17409 a 47 ohm SMD resistor was fractured. While removal the device crumbled into pieces. Replacing the device corrected the symptom.
RCA F32665 CTC203 tuner F36665 Serial 850321079 . Unit has no reception , all snow on all channels and bands Observation shows that R14156 is overheated and measures open. There are no measurable shorts on this 9 volt "Run" supply line to ground. R14156 is a 51 ohm 1/2 watt part number 235379. I had tech replace this resistor, and monitor the supply voltage on the input side resistor that is not connected to zenor diode CR14116. It was 12 volts vdc. Measuring CR14116(K) there was only 1.4 vdc where there should have been 9.1 volt because of this zener diode. CR14116 leaky, part number 227362.
PSN F32645 CTC203 tuner Unit will not auto program  Solder connections around C13114. R13109, & R13110
RCA F27615 CTC203 TV Guide Plus F27615 serial 916230801 When the TV Guide Plus is used to control the VCR by using the televisions IR. blaster the VCR will turn on correctly. However in this configuration the TV guide plus setup will not allow the television to change channels from the CATV box output which is channel (2) to the VCR output which is channel (4). TV always remains on channel 2 but the OSD shows channel 4. Contacted Thomson TV Guide Plus help desk which did not have any answer to this trouble. AI suggested that we contact the CATV co. and try to obtain a CATV box that has an output on channel (4). This way the output of the VCR and the CATV box are the same channel and everything will operate as designed. I contacted the CATV co. which is Charter communications They agreed to contact the customer and provide the customer with a channel 4 (output) CATV box. FOLLOW UP: This CATV box change corrected the trouble.
RCA F32645 CTC203 TV Guide Plus F32645 a serial 916521835 Cannot get television to change channels. TV is always stuck on channel 3. When the channel is changed the number moves but the tuner does not change frequency The customer answered yes to the question in the TV Guide Plus setup instructions that asks the question, "Do you have a CATV box?", & "Do you have a VCR?". However they are not using the IR. blaster that is needed to communicate from the TV to the CATV box and VCR. Unless the customer uses the IR. blaster they must answer "NO" to these two questions. The set now works normally.
RCA F36645 CTC203 TV GUIDE PLUS F36645 Unit has TV Guide Plus but it is dropped from the menu Tech needs to check to see the TV Guide Plus module if fully plugged into its harness. Since the service call is in the Lake Arrowhead, and the customer will need to get the TV down from a high shelf it is suggested the tech go out with a module just in case the board does have a hardware problem. After getting set down from the shelf it was discovered the connector J26402 was not connected. This television was delivered in a box and was the first time it was ever sold. Reconnecting this connector restored the TV GUIDE PLUS operation
PSN PS36700 CTC203 TV Guide Plus PS36700 Unit will download TV guide information but there are too many channel groups, but none match the customers television channel line up. Tech needs to pick the correct channel map for that area in the TV Guide Setup menu. In this case the host channel did not have the correct channel map for that cable company. We needed to send a copy of the CATV channel line up to Thomson, who forwarded it to Gemstar. Gemstar in turn added the channel line up to the data sent out by our host channel. In 3 weeks the set was able to display the correct channel line up.
RCA F32645 CTC203 TV Guide Plus Unit is stuck on Channel 3. Unit does have TV guide plus. Tech put the television in the EPG test mode by entering the EPG setup mode the selection the "GOBACK" button Twice. This caused the television to run a series of tests that check out the TV guide plus module. Unfortunately this test will not change the customer settings in the television. In the TV Guide set up menu the tech must follow the instructions related to the VCR and CATV box questions. If the customer is not using the IR blaster cable, then DO NOT ANSWER "YES" to the questions, "Do you have a cable box? or Do you have a VCR". The TV tuner will always freeze to that channel but the TV system control section will retransmit the correct IR codes to the VCR or CATV box through the IR blaster cable. The channel number on the TV will change but the VCO in the tuner will remain on the same frequency.
RCA F36665 CTC203 Vertical Jitters Unit has vertical jitters and get worse as the TV heat up Has defective C14521 a 0.22 Part # 224271. It is a poly capacitor off of U12101(16)
RCA F36665 CTC203 video  Loses Video After 20 Minutes. Comes And Goes.  Replace C18154-330mfd@25v. Located On Stand Up Board. Board Is located beside tuner
RCA F36665 CTC203 video  No Video-Has OSD & audio Replace defective U18100--#248620. Also check for cracked solder connections at all SMD devices just below the IC. The IC is located in the combfilter module.
RCA F36665 CTC203 video  No Video-Has OSD & Audio
 Replace Defective U18100--#248620. Also Check For Cracked Solder Connections At All Smd Devices Just Below The IC. The IC Is On The Stand Up Video Module
GE 31GT740 CTC203 Video snmeared TV has a sever horizontal smear in the picture. Even the OSD has the same symptom. Looks like a bad CRT Measuring the G1 supply the tech found the voltage to be too high. Over 55 volts. It should be around 15 to 18 volts. Q12704 was bad. Transistor was replace but failed again in less than a week. It was determined that the cause of this premature failure of Q12704 was due contamination inside the CRT. Replacing the transistor and CRT again corrected the symptom.               Q12740 pn =215496