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Anonymous
RCA CTC-187
Wed Dec 24, 2003 1:06pm
24.235.162.109

RCA
N/A
CTC187
SHUTS OFF INTERMITTENTLY
CHECK/REPLACE ON FLYBACK PINS, ESPECIALLY 1,2,8,10


RCA
N/A
CTC187
WILL NOT TUNE ANY CHANNELS - ONLY HAS SNOW
CHECK/REPLACE Y7401 (P/N# 182839)


RCA
N/A
CTC187
SET DISPLAYS 'UNUSEABLE SIGNAL' ON CERTAIN SCENE CHANGES WHEN USING THE S-VIDEO OR INPUT JACKS
CHECK/REPLACE C1401 AND C1402 TO (1uF) (P/N# 220998)


RCA
N/A
CTC187
AGC OVERLOAD - PIN #12 OF U1001 STAYS AT 8 VOLTS - WHEN 'IF' IS INJECTED AT PIN #1 OF U7301 , THEN NORMAL PICTURE
CHECK/REPLACE U7301 (P/N# 215532)


RCA
N/A
CTC187
PICTURE BOWED ON THE SIDES AND NARROW WIDTH DURING CHANNEL CHANGE
CHECK/REPLACE C4407 (P/N# 214754)


RCA
N/A
CTC187
MISSING ONE OF THE PRIMARY COLOR - RED,BLUE OR GREEN
CHECK/REPLACE IC1001 (P/N# 215524)


RCA
N/A
CTC187
DEAD SET WITH HIGH PITCHES SQUEAL
CHECK/REPLACE Q4401 (P/N# 217654 OR 2SD1555) AND CR4402 (P/N# 198596 OR ECG5808)


RCA
N/A
CTC187
AUDIO DROPS OUT WHILE IN THE SAP MODE
REMOVE C1609 AND REPLACE WITH 47uF @ 25v (P/N# 193043), ADD A 100k (P/N# 192084) ACROSS C1609


RCA
N/A
CTC187
INTERMITTENT TUNER OPERATION
CHECK/REPLACE Y7401 (P/N# 182839)


RCA
N/A
CTC187
SET SHUTS OFF INTERMITTENTLY
CHECK/RESOLDER CONNECTIONS ON FLYBACK XFRM. - ESPECIALLY PINS 1,2 & 3


RCA
N/A
CTC187
SET HAS AN ARC OF VERY FINE LINES IN THE TOP 1/3 OF PICTURE
CHANGE R4868 WITH A 2.2 2 watt RESISTOR (P/N# 215211) DRESS ALL WIRES AWAY FROM L4853, L4001 AND T4101


RCA
N/A
CTC187
REGULATOR IC FAILS WHEN REPLACED - POWER SUPPLY SQUEALS AS THOUGH THERE IS A SHORT ON SECONDARY
CHECK/REPLACE C4137 (680pF @ 500v) FOR LEAKAGE


RCA
N/A
CTC187
INTERMITTENT LOSS OF AUDIO OR VIDEO
CHECK/RESOLDER CONNECTIONS ON ALL GROUND SHIELDS AROUND TUNER AND SYSCON IC


RCA
N/A
CTC187
MENUS ROLL VERTICALLY ON SCREEN -- VERTICAL RETRACE ON THE TOP 3-4 INCHES OF SCREEN
CHECK/REPLACE IC4501 (TDA8172)


RCA
N/A
CTC187
PICTURE GOES BLACK AFTER A 1/2 HOUR - OSD/AUDIO IS NORMAL
CHECK/REPLACE U2903 (7805 REGULATOR)


RCA
N/A
CTC187
NO HORZ. SWEEP - ONLY HAS ONE VERTICAL LINE
CHECK/REPLACE C4403 (PART NUMBER VARIES DEPENDING ON CRT)


RCA
F31672
CTC187
MISSING ONE OF THE PRIMARY COLOR - RED,BLUE OR GREEN
CHECK/REPLACE IC1001 (P/N# 215524)


RCA
F32632
CTC187
AGC OVERLOAD - PIN #12 OF U1001 STAYS AT 8 VOLTS - WHEN 'IF' IS INJECTED AT PIN #1 OF U7301 , THEN NORMAL PICTURE
CHECK/REPLACE U7301 (P/N# 215532)


RCA
F35670
CTC187
AGC OVERLOAD - PIN #12 OF U1001 STAYS AT 8 VOLTS - WHEN 'IF' IS INJECTED AT PIN #1 OF U7301 , THEN NORMAL PICTURE
CHECK/REPLACE U7301 (P/N# 215532)


RCA
F27672
CTC187
PICTURE BOWED ON THE SIDES AND NARROW WIDTH DURING CHANNEL CHANGE
CHECK/REPLACE C4407 (P/N# 214754)

RCA
Chassis:ctc187cl3
Problem:intermittently would not tune cable channels below 51
Solution:L7109 in tuner was intermittently open. 3.9uh pn 200559

RCA
F27641BC
Chassis:CTC187AB
Problem:No pic. No snd. No brightness. HV OK.
Solution: CR4704 (207878 Diode Kit); R4702 (3.3 ohm 2w); R4517 (24 ohm 1w)
Comments:Could hear high voltage come up at turn on. R4702 & R4517 burned open. CR4704 shorted. Must use RCA 207878 special high temp diode. NTE sub will not stay!

RCA
Chassis:RCA (Sears) CTC187CK
Vertical is rolling (menu does not roll)
Repalced IC1001, T-chip (LA7610)
Comments:Even though the vertical sync signal at pin 17 of U1001 was correct amplitude and frequency (according to Sams), a new IC repaired the problem.

RCA
CTC 187BD2
Sides bowed in. Pincushion problem.
CR4403 and C4407 fixed the bow.

GE
27GT618
CTC187BD2
Dead
CR4106 (140V supply to HOT) part# 164589/PFR856 R4110 (R110U, 33K ohm1W) C4107(100 mfd@250VIC U4101 (STK730-010))
Comments:Main v. regulator IC U4101 (STK730-010) should have a negative 40 volts at pin 1 (pin 3 hot ground as reference) if working. Zero volts. Bad U4101. Final fix,replace U4101

RCA
ctc187ck
This set would very very breifly pulse up on HOT collector at plug in, and B+ was on collector, thereafter there was no activity evident from micro or anywhere when pwr button was pressed.
U3201 part #223954 was bad.

RCA
PS27108
CTC187BF2
NO VHF CHANNELS LOW OR HIGH BAND UHF CHANNELS OK
REPLACED U7301 215532
Comments:THINK THIS APPLYS TO ANY RCA / GE CHASSIS WITH TUNER ON BOARD

RCA
Chassis:ctc187
Narrow on sides, width and height vary with scene change
Replace c4407 and cr4403. (will test good)


GE
31GT660
CTC187CH6
No Start Up, Fuse OK.
Main Cap. Shorted. C4007 200 volt X 680Mfd.
Also CR4002 just off C4007 leg needed resoldering.

RCA
F31672ET
Chassis:CTC187CL2
Dead- power supply squeels
H.O.T. Q4401 = BUH517 + bad connection L401 (cause of HOT failure)

RCA
Chassis:ctc187
eeprom replacment
build a double eeprom socket
Comments:To shorten eeprom replacement time, build an eeprom fixture. You need 2ea 8-pin sockets, 1 dpdt switch, 1 small bread board, 4-pin header, and some wire. Conect it so that the switch switches the clock and data lines(pins 5&6).Pin 8 is +5 and gnd pins1,2,3,4,&7. How this helps is if you have a bad eeprom install old and new eeproms in sockets conect in place of eeprom on chassis, start set with new eeprom, swith to old eeprom and look to see if tuner data is salvagable and wright it down, switch to new eeprom adjust values, turn set off and install new eeprom on chassis.

RCA
F32672SB
Chassis:CTC187CL3
Rattling and arcing noise when power is pressed.
Resolder FB402 and CR4403 at location T-11

RCA
F31672ET
CTC187CL2
00 Would not select "VIDEO" input
EPROM RCA# 223957

RCA
F31672ET
CTC187CL2
DEAD, REPLACED HOT AND REPAIRED HOT DR TRANS, THEN HOT RAN VERY HOT
REPLACED Q4401 [USED OEM] CR4402, C4403, R4126, R4868
Comments:Q4401 223942 CR4402 242907 C4403 214753 R4126 215206 R4868 217315 BE SURE TO CHECK SOLDER AT HORIZ DR TRANS T4301



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    • RCA CTC-187 — Anonymous, Wed Dec 24 1:06pm
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            • ctc197curt., Sat Apr 8 9:33am
              On your ctc197 the value of the r14305 is 3.6k and most likely the flyback is shorted.
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            • ctc203wpohl1, Tue Apr 1 6:43am
              CTC203 dead set replaced HOT(2sc5148), Flyback(257151 solder all problem areas-have "jail bars" on left of screen-all else is "OK"? filtered screen circuit! Anyone have IDEAS?-Thanks Wayne
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                you have bad filter off boster voltoge 33 mfd or 47 mfd 250 volts or higer
              • CTC 203 jail barsDani, Wed Apr 2 9:22am
                If you use a generic flyback, this will sometimes cause this problem. Try an ASTI, or HR flyback. Dani
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                Could find nothing on jail bars on that chassis, could be the flyback if it was not an oem and the bars were not their before replacement.
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                Sure sounds like you have a bad electrolytic in boost supply. Look for a cap with value between 1mf and 10mf at 160-450volt. Should be somewhere around flyback or on CRT module.
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