BRAND MODEL CHASSIS Keyword Symptom Cure
RCA G26291 CTC167 Dead G26291WK Unit is dead. Does not have stand by voltage. T4601 is open. Tech has received 3 transformers so far and they have different pin configurations than the original. Tech is receiving a 190508 as a replacement. When installed the primary voltages are 120 V.A.C., but the secondary are Zero volts. Tech has not unloaded the secondary side of this supply yet to see if there is an unusual load that is swamping the output to "0" volts. Suggest tech bring out an external D.C. power supply and connect it to the raw DC output of this stand by supply. Slowly raises the voltage and watch out for excessive current drain as the voltage. The total current should be less the 500 ma. Applying am external voltage from zero to 24 vdc across C4605. This enables the stand by supply without having to plug in the set. Watching the current meter on the external power supply and determine if the stand by supply is drawing too much current. The max current for this unit will probably not be much more than 400 MA. This unit indicated over 1 amp long before the voltage reached 16 vdc. As soon as we noticed an unusual current drain, the we can isolated the  two main loads as indicated on the schematic JW314 and JW 313. The excessive load still existed with all of these areas isolated, the tech will have to analyze what loads on the secondary could cause this type of current drain. A hint in this process is the component that is drawing the most current will typically be the hottest to the touch. It was discovered that C4605 was warm to the touch. Unit had a leaky C4605
RCA PS27113 CTC169 audio PS27113 serial CTC169FB2. Unit has pop in audio at the instant of power on and power off. U1900(3) has 14 volts on the pin during normal run. The voltage drops gradually when the power is shut off. If the Q1901(b) were pulled high with a meter in the diode check mode the audio will mute, and no pop occurs when the set is turned on or off. This indicates the transistor is OK. Unit had open R1901 39K resistor
RCA PS27113 CTC169 AUDIO Unit has pop in audio at the instant of power on and power off. U1900(3) has 14 volts on the pin during normal run. The voltage drops gradually when the power is shut off. If the Q1901(b) were pulled high with a meter in the diode check mode the audio will mute, and no pop occurs when the set is turned on or off. This indicates the transistor is OK. Unit had open R1901 39K resistor.
RCA F26229 CTC169 aux input F26229. Unit will not display video if using the video input mode. Tuner works OK. Tech has luminance at JW6400(7)  Lost contact with tech on the radio.
RCA P46130 CTC169 black blob P46130 serial 233680090. Unit has a intermittent symptom of a large black blob that transverses the top and bottom of picture. The blob is sort of fluid in nature and can cover the majority of the picture. This symptom sounds as though it is from the scan loss circuit. It is a function of the G1  voltage at the CRT being shut down to a much lower level than normal. This effectively mutes the raster. The tech needs to look at the PTV Aux board assembly for possible defective solder connections.
RCA P52753 CTC169 black blob P52753. Symptom is like a blob is shadowy casting a shadow over the entire screen. This blob slowly uncovers the picture in about 5 minutes. Then the picture is normal. Tech needs to look at the Scan loss circuit for this type of symptom. If TP5 on the PTV AUX board is shorted to ground the scan loss circuit is defeated. Care should be taken to insure this is vertical and horizontal sweep before trying to defeat any scan loss protection circuit. If the deflection is OK then the scan loss circuit should be trouble shot.
RCA P52731 CTC169 color P52731 serial 538486058 Unit has a red discoloration on the picture. When looking into the lens of the red tube a big bubble Is seen in the coolant area. Loose like a gel separation in the silicone coolant compound Unit will need a red tube. Also need to inspect board for possible leaks from tube.
GE 46GW944 CTC169 CONVERGENCE 46GW944 serial 650690235 CTC169PKA Convergence has drop off on all horizontal lines on the far right and left side of the screen.  R6121 is open. R6121 A 30 ohm 3 watt resistor is located on the yoke interface board when T6100 is used It is in parallel with the primary winding of this transformer. It is responsible to couple the horizontal yoke current to the secondary for two functions. Dynamic focus and  a horizontal parabolic wave form for the convergence. Since R6121 is open then all the yoke current is passing through the primary of T6100 causing the Horizontal parabolic wave form at the secondary to be excessive and saturating the convergence output transistors on the PTV output board. When the replacing the resistor it was found the device does not get hot or warm anymore. The trouble is still in the Horizontal linearity of all colors. We have no Hpar signal at Pin at T6100(5)  Suggest that we replace T6100.
GE 49GW944 CTC169 CONVERGENCE CTC169PF Convergence has drop off on all horizontal lines on the far right and left side of the screen.  R6121 is open. R6121 A 30 ohm 3 watt resistor is located on the yoke interface board. When T6100 is used, it is in parallel with the primary winding of this transformer. It is responsible to couple the horizontal yoke current to the secondary for two functions. Dynamic focus and a horizontal parabolic wave form for the convergence. Since R6121 is open then all the yoke current is passing through the primary of T6100 causing the Horizontal parabolic wave form at the secondary to be excessive and saturating the convergence output transistors on the PTV output board. When replacing the resistor it was found the device does not get hot or warm anymore. The trouble is still in the Horizontal linearity of all colors. We have no Hpar signal at Pin at T6100(5)  Suggest that we replace T6100.
RCA P60751 CTC169 convergence P60751 serial 340580158 Unit has convergence misalingment  defect on all vertical lines on the right and left side of the picture. This unit does not have any Horizontal Parabolic signal to the convergence waveform board on J8201(5). Unit has a shorted Transformer T7001 on the PTV adapter board . 210772
RCA P60751 CTC169 CONVERGENCE Unit has convergence misalignment alignment defect on all vertical lines on the right and left side of the picture. This unit does not have any Horizontal Parabolic signal to the convergence waveform board on J8201(5). Unit has a shorted Transformer T7001 on the PTV adapter board . 210772
GE PS35123 CTC169 CRT Customer  thinks the CRT is going bad. The colors are bleeding  across the screen for 10 seconds after the set is turned on. Tech needs to check the condition of the 2.7 ohm 3 watt resistor R4703 for the filament current limited. If this resistor is loose or not soldered well there will be an increased voltage drop
RCA P52720 CTC169 CRT CTC169PF Projection. Unit has leaky blue CRT.  Has damaged the convergence board to a point where it needs replacement. Tech will need board # 226117
RCA P52720 CTC169 CRT P52720 serial 631380194 CTC169PF Unit has leaky blue CRT. Has damaged the convergence board to a point where it needs replacement Tech will need board # 226117
GE 35GT680 CTC169 Dead 35GT680 Unit is dead. Q4101 shorted. Parts that were replaced are U4101, Q4101, F4001, CR4106, CR4101, R4110, R4001, & CR4118. Now that all these have been replaced the set was powered up while monitoring the 140 vdc source at the cathode of CR4116. It shot up to 178 VDC with the power supply producing a low pitch squeal. Unit had a defective C4102 It is recommended that the following capacitors are replaced. C4108 39mfd@ 100vdc & C4102 2.2 mfd@ 100vdc. Each of these capacitor share a long history of failure causing the destruction of the Q4101 and other related components.
GE G35302 CTC169 Dead G35302K Unit was dead. Had a shorted Q4101. This is the third time the transistor has been replaced in 2 months.  After replacement the television would turn on but immediately shut down again. Replacing Q4101 and running for about 15 minutes finds the transistor running hot, uncomfortable to the touch. Measuring horizontal output the tech found that Q4401( C) has 178 volts in standby. This is too high… It must be around 140 ~ 143 vdc reference to cold ground. CR4101 & CR4106 were replaced on an earlier service call. The cathodes of CR4101, & CR4106 had 13.7 and 9.2 volts CR4101 & CR4106 respectively. Suggest the tech replace C4108. It is a 47 mfd@ 50 vdc. Replacing the capacitor corrected the symptom
PSN PS27112 CTC169 Dead PS27112 Unit is dead with the exception that it makes a loud chirp in the power supply as soon as power is applied. Monitoring the collector of the Horizontal output at the instant that power was applied the B+ shot to over 190 vdc. It must be 140 vdc in standby. Tech needs to check the power supply voltages in the Standby mode.   In Standby mode, if the B+, at the collector of the horizontal output  is too high the tech needs to replace CR4101, CR4106, C4102. The cathode of both of these rectifiers must be within 1 volt of each other. Monitoring CR4101(K) was 15.9 CR4106(K) was 2.5 volts. The standby feed back voltage is too low. Its voltage is greater than 1 volt difference.
PSN PS35123 CTC169 Dead PS35123 serial 434367182 CTC169EJ5 Unit had the horizontal output transistor replaced, and the set was working afterwards. After two weeks the set was serviced again to have the horizontal output replaced again, at which time the tech replaced the flyback. Two week later the set went out again with a shorted horizontal output transistor. Cust said the set was working fine until they turned it off. When they went to turn it on again the set did not turn on. I Asked the tech to remove the Horizontal output transistor and measure the voltage at the foil when the Collector was connected and check it in the Stand by condition. The voltage was in excess of 214 vdc. This voltage is too high. It is supposed to be 143 vdc. The tech needs to look at several components. Consider Replacing them if they are original equipment C4102=2.2 mfd@ 100vdc, CR4101=207878 Kit contains a large and small diode. The (large) is CR4101, the (small) is CR4106. After replacing the following components the correct voltages returned to the 140 vdc source in both the standby and run modes. Unit had defective C4102  =2.2 mfd@ 100vdc
RCA G31750 CTC169 dead G31750 Unit will not turn on.  Unit has normal stand by voltages at the secondary of power supply. Measuring the B+ at Q4702(C) was 12 vdc. And there was 5 volts to CPU but not the EPROM, Checking the voltages at Q4702 & Q4704 we found the voltages to be normal at the collectors (12.7 vdc), but the base was always "0" volts. U3101(38) was changing logic state at turn on an turn off. Closer inspection of the board found a trace that was scratched off that supplied the voltage to Q4306(c) through R4312. Jumping this bad trace corrected the fault.
RCA G31750 CTC169 Dead G31750WK serial 432750715. Unit has several troubles. The set was dead. Replacing Q4401 and Q4101 got the set running again. But the set had a East/West pincushion problem. After replacing Q4801 that solved the E/W pincushion. Now the unit has no chroma and the band on the neck of the CRT was cut off by another service company during service 1 month earlier. This unit needs to have the 12 and 9 volt supply on Q4702(E) & Q45704(E) checked. They must be within a minimum of 12 and 9 volts. If under by only 1 volt the set will not have chroma. Tech will return and inform me of his findings. As for the magnetic strip on the neck of the tube there is nothing we can do about this problem. The tube will have to be replaced to correct this trouble.
RCA G35302 CTC169 Dead G35302 no serial Unit was already in the shop. Unit will not turn on. Several components have been replaced in the power supply but nothing has corrected the symptom . Unit has no stand by voltages. I asked tech to connect his meter to the cathode of CR4116, then apply power. The voltage shot up to 178 volts then began to drop. This indicated there is no comparison voltage from the switch mode transformer to the Stand by voltage sense input of the regulator U4101. I instructed tech to replace CR4106 with the smaller of the two diodes & CR4101 with the larger diode in the 207878 kit, plus replace C4103 a 2.2 mfd@100vdc. Unit was fixed with these components.
RCA P46101 CTC169 Dead P46101 Unit was dead. Had a shorted Q4101 and shorted U4101.  After replacement the television would turn on but immediately shut down again. Measuring horizontal output the tech found that Q4401( C) has 181 volts in standby. This is too high… It must be around 140 ~ 143 vdc reference to cold ground. Measuring the cathodes of CR4101 & CR4106 we find the value to be over 5 volts apart when compared to hot ground. This voltage must be only 1 volt apart. Typically CR4101 must be 11.7 volts 10.7. In this case we had 14.9 and 9.4 volts CR4101 & CR4106 respectively. Suggest the tech replace CR4101, CR4106, & C4102 (207878 & 2.2 mfd@ 100vdc) & C4108 (39 MFD @50 vdc). Note 207878 is a kit. Small diode is CR4106 large diode is CR4101. The C4108 cured the trouble.
RCA P46725 CTC169 Dead P46725SK Unit blows out the Horizontal output at turn on. When monitoring the  collector voltage of the Horiz out in the stand by mode the voltage is running at 179 volts. Tech replaced the CR4101 and CR4106 and  U4101 with no change in the effect. When the set is running the cathodes of CR4101, and CR4106 should be within 1 volt of each other. In this case the voltage on CR4106 was only 3 volts and CR4101 was 12.9 volts. This would indicate the stand by feed back voltage is too low even though the secondaried were higher than normal.  Unit has a defective C4102 a 2.2 mfd @ 100 volts.
RCA P46730 CTC169 Dead P46730 . Unit had shorted horizontal output transistor. No obvious damage to the power supply in fact when the unit is operated without Q4401 in the stand by mode all is well on all of the secondaries. Tech replaced the horizontal output Q4401 and power up the set again but instantly shorted the Q4401 again. Instructed to check the obvious components in the horizontal output circuit. No defective retakes, or pincushion, or "S" capacitors shorted. I then instructed the tech to remove the anode lead from  the High voltage distribution block assembly and position it so it will not arc to anything. Also cut the B+ running from the power supply to the flyback transformer and put a 40 ~ 60 watt light bulb in its place. This bulb will act as a current limiter and provide a reduced amount of voltage and current to the horizontal output transistor. This acts as a dynamic current limiter and protects the horizontal output transistor from instant damage when powering up the set again. Tech turned on the set again and discovered a hairline crack in flyback transformer arcing to ground. The tech will need the flyback and the correct horizontal output transistor.
RCA P46720 CTC169 Dead P46731 serial Unit will not turn on.  If the power button is pushed there in no change on the Horizontal B+ line on U1001(26)
RCA P46732 CTC169 Dead P46732 serial 429486444. Unit is dead. Q4101 shorted. Parts that were replaced are U4101, Q4101, CR4106, CR4101, & CR4118. Now that all these have been replaced the set was powered up while monitoring the 140 vdc source at the cathode of CR4116. It shot up to 210VDC with the power supply producing a low pitch chirping. The tech needs to look at several components. And consider Replacing them if the are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878  1/2 Kit (large) , CR4106207878 1/2 kit (small), C4108=39Mfd @ 100volts, R4118=56.6K@1%, & R4114=45.3K@1%. After replacing the following components the correct voltages returned to the 140 vdc source in both the standby and run modes.
RCA P46770 CTC169 Dead P46770 Serial 449286130 CTC169PAAS. On a previous claim the tech went out on this unit and found that R4001 was open. Nothing else was defective. Replacing the resistor corrected the dead symptom.  33 days later the tech goes out and finds the same set is dead and R4001 open again. Customer claims the set failed while running. Replacing the resistor again restores normal operation. The resistor is a 1.8 ohm 15 watt. While the set is running the voltage drop across the resistor is between 2.7 ~ 3.2 volts. If the power dissipation is calculated the power ranges from  4.05 ~ 5.6 watts. Nothing abnormal with this dissipation. Suggest the tech replace again and wait to see if it happens again.
RCA P52151 CTC169 Dead P52151 Unit will not turn on. Unit has turn on signal from U3001(38) and has 9 volts on U1001(26) It also has horizontal drive at the collector of Q4302 and Horizontal drive to the base of the Q4401. Unit has broken lead wire on the collector of the horizontal output transistor. Collector was broken at the body of Q4401. Unit needs replacement transistor.
RCA P52731 CTC169 Dead P52731 serial 447280021 Unit has open F4101 and shorted Chopper transistor  failed after 1 minute of operation. Unit appeared to operate correctly Tech also replaced C4108. The tech needs to feel the heat sink of the transistor to see if it is running too hot.  After the second  transistor the temperature was still cool after two minutes. It is possible that we saw a infant mortality of that specific transistor that was used as the Chopper regulator 200165.
RCA P52731 CTC169 Dead P52731 Unit has main fuse blown. Tech replaced the AC line fuse and tried to start the set back up. When tech tried to turn on the set the voltage at the cathode of CR4118 would drop fro 15 volts to 13 volts. However  Q4302(C) would drop from 15 volts to 2 volts. This indicates the horizontal driver has insufficient current available to run the Horizontal driver transformer. Tech needs to check Q4302, R4314, and T4301. R4314 was loose because of ring fractures around the pins.
RCA PS27112 CTC169 Dead PS27112 Shorted horizontal output transistor. The ordered a replacement transistor, and . Unit still shorts the Horizontal output as soon as the set is turned on I asked the tech to check
RCA PS27113 CTC169 Dead PS27113 serial  610410740  CTC169CL5 Unit is a dead set. Unit has standby voltages but the standby voltages at CR4118 read slightly low about 12.5 vdc. Tech spending a lot of time in this area .  I had tech monitor the 143 vdc source at the instant of "Plug in" It shot up to 197 vdc. This is too high. The tech needs to look at several components. And consider Replacing them if the are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878  1/2 Kit (large) , CR4106 =207878 1/2 kit (small), C4108=39Mfd @ 100volts, R4118=56.6K@1%, & R4114=45.3K@1%. After replacing the following components the correct voltages returned to the 140 vdc source in both the standby and run modes.
RCA PS35653 CTC169 Dead PS35653 serial 324356121. Set was dead. After replacing the T4401, C4401, Q4402, CR4401, CR4402, C4403, & Q4401 we find the television will operate for about 2 to 3 minutes then short the horizontal output Tech claims the run B+ is only 120 volts. This is too low. The B+ in run and standby mode
RCA PS35653 CTC169 Dead PS35653 unit has Q4801 blown apart where it measures shorted. The set will not operate. The transistor was replaced but the new on shattered at power up. If the circuit did not malfunction and the transistor shorted the most that would have happened is the set will have a wide picture and the transistor will not shatter. But since the transistor shattered the tech should analyze the PIN modulator circuit for loose or shorted C4401, C4402, CR4401, & CR4402. One of these guys is responsible for the damage.
RCA P46122 CTC169 Dead Set is dead. Tech monitored the 143 vdc source at the instant of "Plug in" It shot up to 200 vdc. This is too high. The tech needs to look at several components and consider replacing them if the are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878  1/2 Kit (large) , CR4106 =207878 1/2 kit (small), C4108=39Mfd @ 100volts.  Tech indicated that he checked the two diodes mentioned. It is important to note that a good static measurement of these  diodes is not a good indication of  their functionality. They can still be bad 
RCA PS35123 CTC169 Dead Set is dead. Tech monitored the 143 vdc source at the instant of "Plug in" It shot up to 200 vdc. This is too high. The tech needs to look at several components and consider replacing them if the are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878  1/2 Kit (large) , CR4106 =207878 1/2 kit (small), C4108=39Mfd @ 100volts.  Tech indicated that he checked the two diodes mentioned. It is important to note that a good static measurement of these  diodes is not a good indication of  their functionality. They can still be bad 
RCA P46122 CTC169 Dead The standby is running in excess of 218 volts at the 140 volt source. As soon as the unit is plugged in the power supply makes a chirp and the voltage shoots up to 218 ~ 220, then slowly falls to Zero These are both too high. The tech needs to look at several components. And consider Replacing them if the are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878  1/2 Kit (large) , CR4106207878 1/2 kit (small), C4108=39Mfd @ 100volts, R4118=56.6K@1%, & R4114=45.3K@1%. After replacing the following components the correct voltages returned to the 140 vdc source in both the standby and run modes.
RCA PS27122 CTC169 Dead Unit has no high voltage. Tech replaced a shorted Q4401, After replacement the set still would not power on. Tech did not check the any of the must haves in the horizontal output and drive section.
RCA P46732 CTC169 Dead Unit is dead. Q4101 shorted. Parts that were replaced are U4101, Q4101, CR4106, CR4101, & CR4118. Now that all these have been replaced the set was powered up while monitoring the 140 vdc source at the cathode of CR4116. It shot up to 210VDC with the power supply producing a low pitch chirping. The tech needs to look at several components and consider replacing them if they are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878  1/2 Kit (large) , CR4106207878 1/2 kit (small), C4108=39Mfd @ 100volts, R4118=56.6K@1%, & R4114=45.3K@1%. After replacing the following components the correct voltages returned to the 140 vdc source in both the standby and run modes.
RCA P60751 CTC169 Dead Unit lost the horizontal output two days after it was installed. The standby is running in excess of 177 volts at the 140 volt source  and the same point in the run mode runs at 166. These are both too high. The tech needs to look at several components. And consider Replacing them if the are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878  1/2 Kit (large) , CR4106207878 1/2 kit (small), C4108=39Mfd @ 100volts, R4118=56.6K@1%, & R4114=45.3K@1%. After replacing the following components the correct voltages returned to the 140 vdc source in both the standby and run modes.
RCA P60752 CTC169 Dead Unit lost the horizontal output two days after it was installed. The standby is running in excess of 177 volts at the cathode of CR4116 These are both too high. The tech needs to look at several components and consider replacing them if they are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878 Kit contains a large and small diode. The (large) is CR4101, the (small) is CR4106.Also C4108=39Mfd @ 100volts should be replaced. It should be mentioned some chassis use a capacitor either 47 or 39 Mfd capacitor (DO NOT SUB) Use the original value . After replacing the following components the correct voltages returned to the 140 vdc source in both the standby and run modes. Unit had defective C4103.
RCA G35302 CTC169 Dead Unit was already in the shop. Unit will not turn on. Several components have been replaced in the power supply but nothing has corrected the symptom . Unit has no stand by voltages. I asked tech to connect his meter to the cathode of CR4116, then apply power. The voltage shot up to 178 volts then began to drop. This indicated there is no comparison voltage from the switch mode transformer to the Stand by voltage sense input of the regulator U4101. I instructed tech to replace CR4106 with the smaller of the two diodes & CR4101 with the larger diode in the 207878 kit, plus replace C4103 a 2.2 mfd@100vdc. Unit was fixed with these components.
RCA P52112 CTC169 Dead Unit was hit by a line surge. Power supply blown. Shorted Q4101, U4101, R4001, R4018. The tech replaced all of the shorted components that were shorted, in addition to CR410, CR4106, CR4118, C4102. Now all the supply does is try to turn start up but it chirps. I instructed the tech to check voltages on CR4101, & CR4106 Cathodes. This voltage should be within 1 volt of each other. CR4101(C) was 10.9, CR4106(C) was 1.7 volts D.C. This indicates we do not have enough feed back voltage from the regulator tertiary winding of T4101, (9, &10) Or we have a severe load on the secondary of the SMPS .All resistances on the secondary looked good at this point. Next was to remove CR4116. Removing this diode removes the 140 vdc source from any unusual loads. Removing this diode gets the supply running in the stand by mode. Unit has a 2485 ohm load on the collector of the horizontal output. This is not a correct load for this circuit in this chassis. It should be above 50K ohms.
RCA PS27122 CTC169 Dead Unit was hit by a line surge. Power supply blown. Shorted Q4101, U4101, R4001, R4018. The tech replaced all of the shorted components that were shorted, in addition to CR4101,, CR4106, CR4118, C4102. Now all the supply does is try to turn start up but it chirps. I instructed the tech to check voltages on CR4101, & CR4106 Cathodes. This voltage should be within 1 volt of each other. CR4101(C) was 10.9, CR4106(C) was 1.7 volts D.C. This indicates we do not have enough feed back voltage from the regulator tertiary winding of T4101, (9, &10) Or we have a sever load on the secondary of the SMPS .All resistances on the secondary looked good at this point. Next was to remove CR4116. Removing this diode removes the 140 vdc source from any unusual loads. Removing this diode gets the supply running in the stand by mode. Unit has a 2485 ohm load on the collector of the horizontal output. This is not a correct load for this circuit in this chassis. It should be above 50K ohms.
RCA P52151 CTC169 Dead Unit will not turn on. Unit has turn on signal from U3001(38) and has 9 volts on U1001(26) It also has horizontal drive at the collector of Q4302 and Horizontal drive to the base of the Q4401. Unit has broken lead wire on the collector of the horizontal output transistor. Collector was broken at the body of Q4401. Unit needs replacement transistor.
RCA G31750 CTC169 Dead Unit will not turn on.  Unit has normal stand by voltages at the secondary of power supply. Measuring the B+ at Q4702(C) was 12 vdc. And there was 5 volts to CPU but not the EPROM. Checking the voltages at Q4702 & Q4704 we found the voltages to be normal at the collectors (12.7 vdc), but the base was always "0" volts. U3101(38) was changing logic state at turn on an turn off. Closer inspection of the board found a trace that was scratched off that supplied the voltage to Q4306(c) through R4312. Jumping this bad trace corrected the fault.
RCA PS35123 CTC169 Faint line PS35123 serial 540260280. Unit has thin vertical line on the left side of the screen only while using the S-video input mode. This line can be seen in the power supply and the though out the video circuits. It appears to be on several CTC169 televisions, not just this model. According to Tech line the phenomena is known by engineering and is currently being looked at but at this time there is no circuit improvement at this time that will address this symptom. I have sent pictures of this to Tech line at Thomson
RCA PS35123 CTC169 Faint Line PS35123 serial 646261235 TEC TRACKING NUMBER J913812. Unit had a symptom of a thin vertical line in the picture when using the S-video mode from a DVD player Called Thomson about this symptom. Their suggestion is to check lead dress
RCA P52653 CTC169 flashing P52653. Unit as flashing raster Previous tech is ordering the PTV AUX board.
RCA P52753 CTC169 flashing P52753. Unit has a flashing picture. Sound is fine The PTV aux board is running cold. The voltages that are produced by the PTV  AUX power supply are no stable. Previous tech has tried to repair the PTV AUX power supply several times but has been unsuccessful. Current tech need to check the presence of the 22 volt filament voltage that is used to turn on this module. It that voltage is too low it will cycle on and off.
RCA P52753 CTC169 flashing Unit has a flashing picture. Sound is fine. The PTV aux board is running cold. The voltages that are produced by the PTV  AUX power supply are no stable. Previous tech has tried to repair the PTV AUX power supply several times but has been unsuccessful. Current tech need to check the presence of the 22 volt filament voltage that is used to turn on this module. It that voltage is too low it will cycle on and off.
GE PS CTC169 GEOMETRY CTC169BJ5 Unit has a symptom of the Raster tilt circuit is causing the purity to be effected. The raster tilt circuitry should only tilt the picture not effect the purity. It is a large coil mounted around the deflection yoke .
RCA PS35652 CTC169 geometry PS35652. Unit has tilted pix. Yoke is bonded to CRT. The PIX tilt switch does not function Picture tilt coil measures 161 ohms. This appears normal. However there id no voltage across this coil. Unit has a ring fracture around the 2 pins on connector P4201
RCA P52720 CTC169 geometry PS52720 Unit will run for hours then in 1 brief instant the top left side of the picture will pull in about 15 inches and 4 inch high area. This area will be black during the incident. It will last less than a second, then return to normal operating condition. Tech did not measure any supply voltages on this chassis. Being that this trouble is so intermittent, it is impossible to say with certainty where or what the cause of the trouble is. It is however recommended that we look toward some history of this chassis on several components that are know for high failure rate. C4108, C4103, CR4101, CR4106, CR4118. Just to name a few. It is unclear if this power supply is causing this trouble or if it is caused by the PTV aux supply. Tech may need to check the health of both power supplies and try heating or freezing components.
RCA PX35652 CTC169 GEOMETRY Unit has tilted pix. Yoke is bonded to CRT. The PIX tilt switch does not function. Picture tilt coil measures 161 ohms. This appears normal. However there is no voltage across this coil. Unit has a ring fracture around the 2 pins on connector P4201
RCA PS35653 CTC169 HIGH VOLTAGE Unit has Q4801 blown apart.  It measures shorted. The set has no High voltage. The transistor was replaced but the new one shattered at power up. If the circuit did not malfunction and the transistor shorted the most that would have happened is the set will have a wide picture and the transistor will not shatter. But since the transistor shattered the tech should analyze the pin modulator circuit for loose or shorted C4401, C4402, CR4401, & CR4402. One of these guys is responsible for the damage.
GE PS35153 CTC169 Horizontal Customer explained the set went to a narrow picture the shut down. Tech replaced the Horizontal output because it was shorted. Tech also replaced C4401, C4402, C4403, CR4401, & CR4402. But nothing in this group of components were shorted. Tech stated the Stand by voltages were within normal ranges. With these new components the set will not develop high voltage or After checking the stand by supply, we found the cathode was under 111 volts in the stand by mode. But CR4118 and C4116 were changed with no change in the symptom. The 1 noticeable anomaly was the collector of Q4302(C) was at 7 volts in stand by. This must always be exactly the same voltage as the cathode of CR4118 in the stand by mode. In Run the voltage can drop to 60% of the VCC  voltage for the Horizontal Driver transistor. R4114 and T4301 were in good condition. Q4302 did not measure shorted nor was the base higher than "0" volts. However when removing Q4302 the voltage rose above 12.5 volts on the  cathode of CR4118 and the foil for Q4302(C) . Tech needs to replace Q4302 part #200168.
PSN PS35122 CTC169 Horizontal PS35122 Unit has a no Horizontal sweep. Checking the resistance at the junction of CR4401 and CR4402 find a path to ground of less than 2 homes. The set still has high voltage but no coupling of horizontal pulses to the Horizontal deflection yoke. Unit has a open C4403. Recommend that C4403, C4402, C4401, CR4401, CR4402, & Q4802 be checked or replaced. Further checking finds CR4401, and Q4802 were shorted.
PSN PS35651 CTC169 HORIZONTAL PS35651 Unit looses Horizontal sync and breaks up in to horizontal lines. My loose raster at times. Never looses sound or On Screen Display. Located on the Digital Combfilter board there is a coupling capacitor Called C6445. It is used to couple a horizontal pulse to the black stretch circuit. This is a high failure rate device. It causes the Digital comb filter to become mechanically intermittent. As soon as tech touched the capacitor it was obvious it was cracked. It is located on the Digital comb filter coordinates G8. It is indicted as C445. C6445 part # is 174422. It is a 2700pf @ 50 volt surface mounted capacitor.
RCA PS31112 CTC169 Horizontal Unit has no horizontal sweep. Suggest the tech look at the possibility that C4403 is open. part # 197518
RCA P52731 CTC169 Luminance P53731 serial Unit has intermittent luminance. But OSD and menu is normal Suggest the tech replace C6445 in the comb filter module. This is a 2700 PF used to couple a pulse to the black stretch circuit. It has been know to crack. It
RCA P53731 CTC169 Luminance Unit has intermittent luminance. But OSD and menu is normal. Suggest the tech replace C6445 in the comb filter module. This is a 2700 PF used to couple a pulse to the black stretch circuit. It has been know to crack.
RCA P46720 CTC169 no raster P46720BA  712590420 Unit has no raster. Unit has sound and will change channels but no OSD or raster. If the G2 were increase the television still will have no raster. Tech needs to check  to see if this unit is in scan loss shutdown. This is a family 4 version receiver and the unit has a separate PTV auxiliary power supply must be running or the unit will go into "SCAN LOSS SHUTDOWN". Feeling the heatsinks of the convergence should feel warm after a few minutes of operation. These were warm. Next I had tech check the J6106(2) on the PTV adapter board. The voltage was 8.6 volts. This indicated the set was in a scan loss shut down mode. Checking the yokes for the appropriate drive signals of vertical and Horizontal drive These were also normal. I instructed the tech to ground J6106(2) to disable the scan loss shutdown. The picture returned. It was converged and had normal sweep. Checking the dual op-amp outputs U6100(1 &7) we found both were 13.6 volts, but the base of transistor. Q6104(B)= 5 volts & Q6103(B)=0 volts. This indicates that either Q6103 or R6114 are bad. Unit had an open R6114 12K1/4 watt resistor.
RCA PS27113 CTC169 no raster PS27113 unit has no raster but OSD. Someone installed the Comb filter module but the symptom did not change. After checking the presence of video to the input of the JW6400(1) connector, it was discovered there was no luminance out of JW6400(7) However we had Data clock and B+ to the module. I requested that the tech put back the old comb filter module which did restore luminance at JW6400(7) and all the way to the T chip U1001(35) but no luminance drive out of the chip. It was also discovered the B+ for the EPROM was too high 5.5 vdc. It should be 4.9 vdc. This condition was corrected by replacing a shorted CR4709. It was also suggested the EPROM and the microprocessor be replaced.
RCA PS27123 CTC169 no raster PS27123 Unit has no raster but has OSD and sound. It was possible to trace luminance up to U1001(35). However the RGB drive is flat line. Looking at U12001(19) the OSD blanker is at 1 volt. It should be at 4.98 volts.  Unit has a cracked resistor R2908
RCA P52720 CTC169 no raster PS52720 Unit has no raster and no filaments. It does have Sound and high voltage Unit had open filament current limiting resistor R4702 a 3 ohm 3 watt resistor.
PSN PS27121 CTC169 NO TURN ON PS27121 serial Unit will not turn on. When the power button is pushed the relay will double click but not turn on. B+ at the collector of Q4401 is 143.00 volts in standby or ruin modes. I asked the tech to measure the voltage at the cathode of CR4118. It was only 10.1 volts. The tech claimed that he statically tested the diode and it checked O.K.  Suggest the tech not believe the test is complete enough to test the diode for all conceivable failures. The best test is to replace the diode and not trust front to back ratio as the only test. Tech replaced the diode and it solved the trouble.
RCA PS27112 CTC169 no turn on PS27112 CTC169CB5 Unit does not turn on. When measuring the Q4401(C ) the voltage shoots from "0" to 190 as soon as the set is plugged in and not turn on Unit  has an open C4402 a 2.2 mfd capacitor
RCA PS27123 CTC169 no turn on PS27123. Unit will not turn on. Measuring all of the standard voltages from the main power supply find the voltages to absolutely correct. However the unit will not power up at all. Closer inspection of the Microprocessor finds that U3101(1) = "0" volts. This is the Reset line and should be 4.98vdc. CR3101 anode has 10.9 volts on it and Q3102 has "0"" on its base and no collector voltage. When measuring the resistance from the CR3101(anode) to ground we found the resistance to be in excess of 1.7 megs and rising (should be 18.2) . Checking the resistor R3114 finds that its values has increased beyond it 8.2K
PSN PS27122 CTC169 OSD PS27122 serial 917217225 CTC169CD5. Unit has OSD broken into segments across the screen. The tech needs to look at the possibility of defective EPROM but before it is replaced the tech needs to check the B+ at U3200(8) It must be 4.9 volts. If not check or replace CR4709.
RCA P52720 CTC169 OSD P52720 serial When the unit is running and the OSD is up, There is an extra character in the shape of a  slant line above the channel display.  The slant line displays it self with different colors on the screen in cyan, magenta & yellow. When a flat red, green or blue field is displayed on the screen the areas of the slant bar is black. Removing of the screen reveals a small piece of paper hanging from the top of the cabinet about 2 inches from the projection screen
RCA PS31122 CTC169 OSD PS31122 serial 4243664322 Unit has the TEXT box on the screen all the time. Unplugging the set will reset the function and it will operate correctly for a while. Suggest the tech measure the B+ on the EPROM  when the set is running It should be 4.9 volts no higher. This television was running 4.89 vdc. This is normal. "It is suggested that the trouble is located in the system control Micro.
RCA F27770 CTC169 Power supply F2770 serial 529517150 Unit has insufficient horizontal and vertical sweep. Measuring the "RUN" B+ for the deflection we find the 143 vdc source only at 127vdc. In the stand by mode the same point of measurement was 142 vdc. This indicates the Run supply is not regulating well and the Standby  is running fine. When checking voltages in the "RUN" mode we found there is no change in the Pulse Width Modulation of the power supply when the load changes or is the AC line in increased or decreased. There should be significant changes in the PWM of this supply. There is no PWM signal at Q4106(C), no B+ at Q4106(E) No B+ at Q4111(C) and Q4111(B) 6.1) Q4111(E) was 15 vdc. Since this is a PNP transistor the voltages indicate an open transistor. Replacing the device corrected the symptom
RCA P60751 CTC169 power supply P60751 CTC169PA. Unit lost the horizontal output two days after it was installed. The standby is running in excess of 177 volts at the 140 volt source  and the same point in the run mode runs at 166. These are both too high. The tech needs to look at several components. And consider Replacing them if the are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878  1/2 Kit (large) , CR4106207878 1/2 kit (small), C4108=39Mfd @ 100volts, R4118=56.6K@1%, & R4114=45.3K@1%. After replacing the following components the correct voltages returned to the 140 vdc source in both the standby and run modes.
RCA PS52151 CTC169 Power supply PS25151 serial 130660101  In the stand by mode the power supply squeals. But when it is on the power supply runs normally. Tech needs to check the power supply voltages in both modes, "Stand by" and "Run". Each mode has different feedback comparisons signals. In the Stand by mode the B+ at the collector of the horizontal output was running at 165 vdc. This is too high. It should be 143 at the most. Tech needs to replace CR4101, CR4106, C4102, & C4108.
RCA PS25151 CTC169 Power supply In the stand by mode the power supply squeals. But when it is on the power supply runs normally. Tech needs to check the power supply voltages in both modes, "Stand by" and "Run". Each mode has different feedback comparisons signals. In the Standby mode the B+ at the collector of the horizontal output was running at 165 vdc. This is too high. It should be 143 at the most. Tech needs to replace CR4101, CR4106, C4102, & C4108.
RCA P52112 CTC169 Raster P52112. Unit has intermittent raster.  Symptom occurs randomly. Unit will run for hours then the raster will disappear without any warning. The Sound remains. All OSD and PIP displays are non operational. After a little checking It was discovered the vertical ramp at the deflection yoke changed from a saw tooth to a narrow 60 hz pulse when measured at the high side of the vertical deflection yoke.  Inadvertently capacitor C4511 was moved with the oscilloscope probe, the raster reappeared and the pulse changed to a saw tooth again. Close inspection under the chassis found ring fractures on C4511. Resoldering these connections corrected the problem.
RCA P60751 CTC169 raster P60751. Unit looses raster intermittently. U7005(7) is running at "0" volts where it should be 13 volts. When spraying the  CPU with freeze spray the problem will correct it self.
RCA P60751 CTC169 raster P60751EW ser 419480687.  Unit has symptom of intermittent raster, but sound is O.K. Unit has been serviced 4 times for this problem. Tech unable to confirm the symptom.  Cust claims a manager said they will IFS the unit.
RCA PS27152 CTC169 raster PS27152. Unit has an intermittent symptom of intermittent filaments I had the tech disconnect the CRT socket from the CRT and measure the continuity or the filament winding, R4703, and the ground integrity of the filament return path. 10K resistance was measured across the filament source supply. It should be less than 3 ohms. Further checking discovers that the ground integrity at the flyback transformer T4401(9) was nearly open. Where the pin of the flybacy meets the board, it passes through a rivet that attaches to the Circuit board copper trace. This rivet, it appears is soldered to the pin of the flyback but the rivet is not making electrical contact to the trace. Suggest the tech install a separate ground wire for T4401(9) and hard wire it to a stable ground point.
RCA PS52721 CTC169 Raster PS52721 Unit has no raster. Unit has high voltage, and sound, and able to change channels. However it has no OSD. Filaments appear to be normal I asked the tech to feel the heat sinks around the chassis and the PTV AUX power supply. It was discovered the PTV AUX power supply and the convergence output transistors were cold after 20 minutes of operation. These should be warm to the touch. I had the tech monitor the filament voltage to the input of the of the PTV power supply board at J7002(4) There was only 0.5 volts peak to peak. Further checking the resistor R4703 on the deflection discovered the device was open. Replacing the resistor with a 3.3 ohm 2 watt brought out Voltage at J7002(4) to 30 volts peak to peak. This still did not correct the symptom vbecause the power supply still did not turn on. Further checking at the CR7023(C) we had 12 volts peak to peak but CR7018 only had .5 volts. Q7006(C) was 22 volts, Q7006(B) was only 0.4 volts. In order for the supply to trun on the voltage ay Q7006(B) must go to 0.7 volts(contrary to what it says in service docs). Unit has an open R7021 measures 107k instead of 18 K.
RCA PS27152 CTC169 raster Unit has a symptom of intermittent filaments supply causing intermittent raster. I had the tech disconnect the CRT socket from the CRT and measure the continuity on the filament winding, R4703, and the ground integrity of the filament return path. 10K resistance was measured across the filament source supply. It should be less than 3 ohms. Further checking discovers that the ground integrity at the flyback transformer T4401(9) was nearly open. Where the pin of the flyback meets the board, it passes through a rivet that attaches to the Circuit board copper trace. This rivet, it appears is soldered to the pin of the flyback but the rivet is not making electrical contact to the trace. Suggest the tech install a separate ground wire for T4401(9) and hard wire it to a stable ground point.
RCA P46122 CTC169 RASTER Unit has no raster but has sound Asked tech to feel the heat sinks on the PTV Adapter heat sinks and see if they are cold.  They were cold. Tech need to measured front to back ratio of CR7061 finds the front to back to be 0.197 & 0.198 volts F/B ratio.  When comparing the CR7062 the F/B ratio is significantly different with 0.698 to 0.398. By disconnecting the jumper JW739 we are able to obtain a normal F/B ratio on CR61. Tech has a short circuit in the load side of this portion of the power supply.
RCA PS27122 CTC169 raster Unit has no raster. Unit has high voltage and vertical sweep. Tech claims the unit has no filaments. There is no continuity between the filament windings of the CRT. The tech needs the CRT A79AEJ10X0.
RCA P46720BA CTC169 raster Unit has no raster. Unit has sound and will change channels but no OSD or raster. If the G2 were increased, the television still has no raster. Tech needs to check to see if this unit is in scan loss shutdown. This is a family 4 version receiver and the unit has a separate PTV auxiliary power supply must be running or the unit will go into "SCAN LOSS SHUTDOWN". Feeling the heatsinks of the convergence should feel warm after a few minutes of operation. These were warm. Next I had tech check the J6106(2) on the PTV adapter board. The voltage was 8.6 volts. This indicated the set was in a scan loss shut down mode. Checking the yokes for the appropriate drive signals of vertical and Horizontal drive These were also normal. I instructed the tech to ground J6106(2) to disable the scan loss shutdown. The picture returned. It was converged and had normal sweep. Checking the dual op-amp outputs U6100(1 &7) we found both were 13.6 volts, but the base of transistor. Q6104(B)= 5 volts & Q6103(B)=0 volts. This indicates that either Q6103 or R6114 are bad. Unit had an open R6114 12K1/4 watt resistor.
PSN PS35153 CTC169 RETRACE PS35153 Unit has bright screen with retrace lines 200 vdc source only measures 120 vdc. Tech needs to check or replace the C4703=47mfd@250vdc, C4716= .082mfd@ 250 vdc and CR4701. Unit had a defective C4716.
RCA PS35152 CTC169 retrace PS35152 Unit has bright screen with retrace lines. Unit has no 200 vdc source. Currently the voltage is only running 18 volts.  Unit has no problem with CR4701, or C4703 but C4716 is open. A 0.062 mfd @ 200 vdc is open.
RCA G27400WK CTC169 retrace Unit has a bright screen with retrace lines then shuts down Cathode of CRT running at 11 volts DC. The 200 vdc source is running at 178 vdc. This is what I would expect with this symptom. When measuring the Q2906 on the chassis (17M) we had 12 volts on the emitter. Removing the transistor found a Emitter Collector short. Tech replaced Q2906 part# 143806.
RCA G27221 CTC169 retrace lines G27221WK Unit has  bright screen with retrace lines. If the set is on longer than a few seconds after the filaments warm up, the set will shutdown Measuring the 200 vdc source at the cathode of CR4701 we find 200 vdc, but at the cathodes of the CRT we only have 67 VDC.  Q2906 is shorted.
RCA G27400WK CTC169 retrace lines G27400WK serial 211650187  CTC169CF2 Unit has a bright screen with retrace lines then shuts down Cathode of CRT running at 11 volts DC. The 200 vdc source is running at 178 vdc. This is what I would expect with this symptom. When measuring the Q2906 on the chassis (17M) we had 12 volts on the emitter. Removing the transistor found a Emitter Collector short. Tech replaced Q2906 part# 143806
RCA G36800 CTC169 retrace lines G35800CK Unit was dead tech replaced CR4118. After replacement the tech had only a vertical line. Unit has a defective C4403. After replacing these components the set developed a raster but had a bright screen with retrace lines, I had tech measure the 200 vdc line at the CRT socket E5009. It was "0" volts, This voltage comes from CR4701 from the Flyback. Components that have a history of having problems. CR4701, C4716, C4703, and R4720.
RCA PS35653 CTC169 retrace lines PS35653. Unit has a bright screen with retrace lines. A previous Tech from 6-14 had ordered the CRT by without authorization. This tech calling in about the symptom and not sure about the previous diagnosis. I asked tech to check the voltages at the cathode of the CRT. Each cathode was at 502 volts. Measuring the raw 200 vdc source was only 50 volts. Instructed tech to check C4703 the 47 mfd @ 250 vdc. ESR readings indicated over 10000 ohms, this meant it was open. Replacement of C4703 corrected the symptom.
RCA PS35653 CTC169 retrace lines PS35653. Unit has a bright screen with retrace lines. Tech calling in for CRT approval Tech claims the voltages at G2=50 to 380 vdc depending on the position of the G2 control. G1= 18vdc. The cathodes are at 200vdc.  If there is no mistake in these  readings there is no way the CRT should have any beam current at all. These reading indicate the tube should be in cut-off. After stating these facts the tech volunteered to go back and verify these readings. As he is not 100% to the accuracy of the readings. This tech never returned
RCA P52720 CTC169 retrace lines Screen goes to bright screen with retrace lines Unit has open C4713 a .082mfd capacitor in the 200 volt cathode driver power supply.  OPEN C4713 0.82 mfd@ 250vdc
RCA P60751 CTC169 shorted Q4401 P60751 serial # 3430580158 CTC169PAC Unit will run for about 1 or 2 days then when it is shut off. Once it is turned on again the set will fail to turn on. The Horizontal output transistor is shorted.  What nay be happening is the Q4401 Transistor is failing at turn off. This is due to a defective Horizontal driver transformer T4301. A slight leakage in the transformer from the primary to the secondary may rail the horizontal output transistor when the set is off. The television always has  B+ on the primary of the transformer and always has full B+ at the collector of the H.out Q4401.Tech needs to replace T4301= 206394
RCA P60752 CTC169 Shorted Q4401 P60752 CTC169PE. Serial 445587432Unit lost the horizontal output two days after it was installed. The standby is running in excess of 177 volts at the cathode of CR4116 These are both too high. The tech needs to look at several components. And consider Replacing them if the are original equipment C4103=2.2 mfd@ 100vdc, CR4101=207878 Kit contains a large and small diode. The (large) is CR4101, the (small) is CR4106.Also C4108=39Mfd @ 100volts should be replaced. It should be mentioned some chassis use a capacitor either 47 or 39 Mfd capacitor (DO NOT SUB) Use the original value . After replacing the following components the correct voltages returned to the 140 vdc source in both the standby and run modes. Unit had defective C4103.
RCA PS27122 CTC169 shut down Unit tries to turn on but goes into shut down. All stand bys are normal. When checking to see if there any short circuits in the vertical output circuit the SCR501 measures shorted all the was around.
RCA P52731 CTC169 SHUTDOWN P52731WK serial 539390018. Unit will turn on but only for 15 seconds then shut down. When it does turn on the set will have East/West  pincushion error and the bottom will have  sever bow up in the center. Tech also explains the Pincushion module over heats as soon as the set turns on. Tech replaced CR4402 and C4402 without effecting the symptom I asked the tech to check the cathode of CR4402 the Pin cushion modulator diode. It was 14 volts. This really is not too bad.  The B+ from the power supply is normal. I asked the tech to see what the waveform looked like at the collector of the Horizontal output, but he could not without a scope. Tech needs to finish replacing the components in the damper circuit CR4401 & C4401. Possible there is some leakage causing an over voltage/current condition in the PIN correction board
RCA PS CTC169 shuts down PS27151 Tech replace the digital picture in picture module. Now the customer has a complaint that the set intermittently shuts down then right back on again.  C4101, C4102, C4103, and C4108 have been replaced. The stand by voltages slightly higher than normal It is not known if the shut down is coincident to scene content or not. Tech did not measure the Run B+'s. It is very important to validate the correct voltage at the cathode of CR4116. It must me <145. If it is > 145 then the set may enter a X-ray protection mode where the set will cycle off then immediately back on again. It  is determined the B+ is within normal values and high voltage is 31.5KV then it just might be a failure in the Xray sensing circuitry. Another tech was out to replace the C4108 and installed a 47 mfd at 160 vdc. This is not the correct value for this chassis. It is supposed to be a 39 mfd @ 100 vdc. Note: This value should not be changed. The timing of this circuit is critical. Tech installed the correct value and all voltages return to normal levels.
RCA P52731 CTC169 SNOW P52731 While replacing the Main VHF tuner the set failed to operate in the tuner mode. All snow was the symptom Tech accidently knocked off the surface mounted buffer resistor R3604 from the main chassis that connects to the tuner, pin # 7. It is a 1K resistor. Suggest the tech replace it with a lead type 1K device
RCA P52731 CTC169 sound P52731WK ser 538586412. Unit has no sound but no raster. I asked tech to check aCR8 in the PTV AUX power supply is shorted
RCA PS27122 CTC169 sound Unit has pulsing raster and no sound. The small ptv aux power supply is chirping.. This indicated the supply has an excessive load on the secondary.
RCA PS31122 CTC169 sweep PS31112 serial Unit has no horizontal sweep Unit has an open C4403. part # 197518
RCA PS35153 CTC169 sweep PS35153 serial 436366409. Customer explained the set went to a narrow picture the shut down. Tech replaced the Horizontal output because it was shorted. Tech also replaced C4401, C4402, C4403, CR4401, & CR4402. But nothing in this group of components were shorted. Tech stated the Stand by voltages were within normal ranges. With these new components the set will not develop high voltage or After checking the stand by supply, we found the cathode was under 111 volts in the stand by mode. But CR4118 and C4116 were changed with no change in the symptom. The 1 noticeable anomaly was the collector of Q4302(C) was at 7 volts in stand by. This must always be exactly the same voltage as the cathode of CR4118 in the stand by mode. In Run the voltage can drop to 60% of the VCC  voltage for the Horizontal Driver transistor. R4114 and T4301 were in good condition. Q4302 did not measure shorted nor was the base higher the "0" volts. However when removing Q4302 the voltage rose above 12.5 volts on the  cathode of CR4118 and the foil for Q4302(C) . Tech needs to replace Q4302 part #200168.
RCA PS27122 CTC169 system control Unit has intermittent dark and light video. Also when the  set is turned off the set forgets the previously memorized active channels for channel scan to operate I had tech to check the supply voltage at the EPROM U3201(8). It was running 5.27 volts. This is too high. Unpredictable operation of the Microprocessor will result if this voltage is operated in excess of 4.9 volts. Unit had defective CR4709. This is a 1N4001 plain vanilla rectifier. 100 PIV. Replacing corrected the symptom.
PSN PS27125 CTC169 tuner Television only gets channel 5. All other channels are snow. Tech changed the CPU, Jungle IC and the tuner. Asked tech to check the data and clock signal at the tuner (7 &8) and see if the signal is 5 volts peak to peak.
RCA PS27108 CTC169 tuner PS27108 serial 442216933 . When selecting UHF channel 44 the channel takes too long to lock in only on UHF channel 44. All other channels tune in correctly This customer is in an outlying area of Nevada where all channels are provided to the customer on UHF through translators on mountain tops surrounding the area. Since only 1 channel is effected and all the rest are normal it is assumes the UHF channel 44 is not exactly within frequency specifications.
RCA PS27108 CTC169 tuner When selecting UHF channel 44, the channel takes too long to lock in.  This only occurs on UHF channel 44. All other channels tune in correctly This customer is in an outlying area of Nevada where all channels are provided to the customer on UHF through translators on mountain tops surrounding the area. Since only 1 channel is effected and all the rest are normal it is assumes the UHF channel 44 is not exactly within frequency specifications.
RCA PS25113 CTC169 vertical PS26113 serial  6463123974 CTCCL5 Unit has no vertical sweep R4714 open and burned
RCA PS27112 CTC169 vertical PS27112 Unit had the  following components replaced. U4501 & C4520  Another tech ordered them and this tech installed them. This tech did not check what the symptom was before replacing. Unknown reason for replacement  Unit ha a symptom of 1 complete sine wave on the screen instead of a flat horizontal line. Unity  has no vertical sweep. Shorted SCR501. Suggest the tech replace CR4501 SCR501, and C4503.   Unit had a defective SCR401.
RCA PS31122 CTC169 vertical PS31122 Unit has insufficient vertical sweep. Tech ordering the CR4115, and R4144.  I do not have any specific information on this unit. The voltages from the power supplies I need in order to establish the health of the Run power supply.
RCA PS35123 CTC169 vertical PS35123 serial 442360911 Unit has intermittent vertical sweep. Another tech was out a few days ago to replace the  U4501 and a few other components. Tech noticed that U4501 was not fully seated. After removing the solder on the legs of the IC it was discove4red the IC  Pins never penetrated the board enough to be soldered effectively. Removing the solder and fully inserting the IC into the holes then resoldering corrected the fault
RCA PS35153 CTC169 vertical PS351253 serial 449560832 CTC169BJ5 Unit has a vertical roll in the tuner mode, but it is OK in the video input mode. If the PIP & main sources were set to the tuner mode the video on the PIP image would be stable but main would still roll This television has a S-PIP board. Tech would need to check the condition of the composite video  to the S_PIP module. J8002(3) is for tuner video. Tech could not check any of these areas because the customer had to leave. Need to reschedule call with tech and arm him with the schematic of the S-PIP module.
RCA PS35150 CTC169 vertical PS35150 Unit has intermittent vertical sweep. Vertical drive was found at U1001(29), U4501(3) & U4501(1) The latter was at 20 volts peak to peak. But the anode of the SCR was only 30 volts peak to peak. This would indicate a open in the yoke circuit. Measuring the DC resistance between the anode of SCR501 measured over 1 meg of resistance where it should have been under 3K. The horizontal driver transformer and the flyback had good continuity, but the yoke was in excess of 1 meg measured at the Yellow and green wires or at the connector. The yoke should be 10 ohms. Problem is the wiring inside the yoke came unsoldered from the terminal post on the yoke housing. Resolder wire to terminal post and problem solved
RCA PS35150 CTC169 vertical Unit has intermittent vertical sweep. Vertical drive was found at U1001(29), U4501(3) & U4501(1) The latter was at 20 volts peak to peak. But the anode of the SCR was only 30 volts peak to peak. This would indicate a open in the yoke circuit. Measuring the DC resistance between the anode of SCR501 measured over 1 meg of resistance where it should have been under 3K. The horizontal driver transformer and the flyback had good continuity, but the yoke was in excess of 1 meg measured at the Yellow and green wires or at the connector. The yoke should be 10 ohms. Problem is the wiring inside the yoke came unsoldered from the terminal post on the yoke housing. Resolder wire to terminal post and problem solved .
RCA PS35123 CTC169 vertical Unit has intermittent vertical sweep. Another tech was out a few days ago to replace the  U4501 and a few other components. Tech noticed that U4501 was not fully seated. After removing the solder on the legs of the IC it was discove4red the IC  Pins never penetrated the board enough to be soldered effectively. Removing the solder and fully inserting the IC into the holes then resoldering corrected the fault
RCA PS26113 CTC169 vertical Unit has no vertical sweep R4714 open and burned
RCA P52732 CTC169 Vertical Line P52732WK 433386326. Unit has a very light horizontal band across the across in center of the screen. The line is transparent, and can be seen as brightening of the screen in a 1.5 inch high band in the center of the screen. It is suggested the tech check to see if this is a deflection abnormally. Note: RG&B drive was present. Tech cranked up the 3 G2 adjustments  to get this image. It was determined the problem was no vertical sweep. Unit has a defective C4511 2200 mfd@ 50 vdc
RCA PS35123 CTC169 Vertical Line Unit had a symptom of a thin vertical line in the picture when using the S-video mode from a DVD player. Called Thomson about this symptom. Their suggestion is to check lead dress
RCA G27688 CTC169 video G27688 serial 319441008. Unit  has green streaking in picture. This is similar to a horizontal smear on the CRT. Tech called and left message I needed to know if the G2 voltage was normal. 340~380. Tech was unable to tell me what the voltages was. If the G2 is too low this horizontal smear will be very evident. Tech also stated the other colors smeared too but the green was the worst. Tech needs to go back and obtain these readings. Also with a oscilloscope, and a gray scale generator, the RGB signals can be monitored at the output of U1001(15, 17, 18) for significant over shoots on each luminance step. This process and be followed all the way to the cathodes of the CRT. The tech should expect to see clean steps of luminance up to the circuit that is causing the problem, where over shoots of the leading edge of the waveform will be present.
RCA PS35123 CTC169 video  PS35123 Customer  thinks the CRT is going bad. The colors are bleeding  across the screen for  20 seconds after the set is turned on. The 2.7 ohm 3 watt resistor (R4703) for the filament current limiter was loose and not soldered well. This caused an increased voltage drop across the resistor and a drop in the filament voltage.
RCA P60752 CTC169 video interference P60752 Unit has a symptom of an Inverted "V" on the screen and complaints that 3 colored circles can be seen on the screen from a distance of 28 feet. Tech needs to perform modification listed  in bulletin for the Horizontal driver transformer. Tech also needs to look at the optical path for dirt or dust that might cause a glare or defusing of the light for the second symptom
RCA PS27122 CTC169 Dead PS27122 Serial 422466349. Unit is dead. Tech changed the horizontal output and the unit ticks will not power up. Measuring U4101(16) voltage cycles from 7 to 18 volts. Measuring the collector of the Horizontal output in the stand by mode the voltage will jump to 200 volts and fall to 160. Measuring diodes CR4101(C) & CR4106(C) find  jumping voltage from 18 to 8 volts and 2 volts on CR4106(C). Unit had defective CR4106 and C4103 =2.2 @ 100vdc.