Chassis #CTC-167C. Problem started with thin lines/mirror image at top,then increased to 2 inches. This morning the only video was a thin line in the middle. I understand this is a problem with the vertical output IC and maybe the boost voltage. Is the boost voltage the same as the B+ and would you know the IC number or anything else I should look for?
Thanks,
Jeff

The vertical ic is U4501 It could be bad,also check CR4504,and C4502,Also here some Tips good luck.

Anonymous
RCA CTC176
Wed Dec 24, 2003 12:52PM
24.235.162.109


RCA
CTC176
INTERMITTENT TUNER OPERATION
CHECK/REPLACE Y7401 (P/N# 182839)


RCA
N/A
CTC176
NO VERTICAL AND NO AUDIO
CHECK/REPLACE CR4704 (P/N# 207878)


RCA
N/A
CTC176
DEAD SET
CHECK/REPLACE R4104 (1.5m @ 1/2w)


RCA
N/A
CTC176
NO VERTICAL SWEEP - MISSING 24v SUPPLY FROM FLYBACK
CHECK/RESOLDER CONNECTIONS ON PIN #10 OF FLYBACK


RCA
N/A
CTC176
LOW OR NO SOUND
REPAIRED ALL COMMON GROUND CONNECTIONS AND REPLACE EEPROM


RCA
N/A
CTC176
NO COLOR ON SOME CHANNELS OR ON SOME VIDEO GAMES
CHECK VALUE OF R2805, IF NOT A 750 , THEN REPL. (PN#215200) CHANGE R2806 TO A JUMPER,REMOVE C2806,ADD 1uF TO C2801 PADS


RCA
N/A
CTC176
NO STEREO - OSD STEREO INDICATOR NEVER COMES ON
CHECK/REPLACE C1707 (P/N# 205230)


RCA
N/A
CTC176
DEAD SET WITH NO SOUND OR PICTURE BUT HAS HIGH VOLTAGE
CHECK/REPLACE CR4704,R4702 AND R4517


RCA
N/A
CTC176
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
CTC176
SET TURNS ITSELF ON AND OFF, CHANGES CHANNELS,MENU COMES UP AND MUTES ITSELF
CHECK/REPLACE IR3401


RCA
N/A
CTC176
NO VERTICAL AND R4511 IS BURNED
CHECK/REPLACE U4501 (P/N# 215531) AND R4511 (P/N# 215577)


RCA
N/A
CTC176
TUNER LOCAL OSCILLATOR DROPS OUT ON BAND TWO
CHANGE C7311 TO NEW PART (P/N# 194906) - BANDS ONE AND TWO OF TUNER MUST BE REALIGNED


RCA
N/A
CTC176
OSD AND MENUS ROLLS
CHECK/REPLACE C3317


RCA
N/A
CTC176
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
CTC176
INTERMITTENT VERTICAL SWEEP
CHECK/RESOLDER CONNECTIONS ON ALL GROUND SHIELDS AROUND TUNER AND SYSCON IC


RCA
N/A
CTC176
POOR REGULATION - B+ RUNNING ABOUT 120v
CHECK/REPLACE Q4153 FOR LEAKAGE - MAY CHECK FINE OUT OF CIRCUIT


RCA
N/A
CTC176
INTERMITTENT VERTICAL SWEEP OR SET TRIES TO COLLAPSE AT THE TOP
CHECK/RESOLDER CONNECTIONS ON U1001 PINS 15,16,17 AND 18 AND ALL PINS ON U4501


RCA
N/A
CTC176
UNABLE TO TUNE ABOVE CHANNEL 4 OR INTERMITTENT SHUTDOWN
CHECK/RESOLDER CONNECTIONS ON ALL GROUND SHIELDS AROUND TUNER AND SYSCON IC


RCA
N/A
CTC176
SHUTS OFF INTERMITTENTLY
CHECK/REPLACE ON FLYBACK PINS, ESPECIALLY 1,2,8,10


RCA
N/A
CTC176
INTERMITTENT LOSS OF AUDIO OR VIDEO
CHECK/RESOLDER CONNECTIONS ON ALL GROUND SHIELDS AROUND TUNER AND SYSCON IC


RCA
N/A
CTC176
NO VERTICAL SWEEP
CHECK/REPLACE C4503 (SMD) - U4501 (P/N# 215531)


RCA
N/A
CTC176
CHROMA BAR AT THE TOP OF THE PICTURE DURING PLAYBACK OF A VIDEO TAPE
CHECK/REPLACE U1001 (P/N# 215524)


RCA
N/A
CTC176
PICTURE BOWED ON THE SIDES AND NARROW WIDTH DURING CHANNEL CHANGE
CHECK/REPLACE C4407 (P/N# 214754)


RCA
N/A
CTC176
NO OSD AND NO REMOTE OPERATION
CHECK/REPLACE CR4104 (5.6v ZENER - P/N# 215488), Q4103 AND Q4105 (P/N# 146851)


RCA
N/A
CTC176
DEAD SET WITH NO SOUND OR PICTURE BUT HAS HIGH VOLTAGE
CHECK/REPLACE CR4704 (P/N# 207878),R4702 (P/N# 215211) AND R4517 (P/N# 215208)


RCA
N/A
CTC176
WILL NOT TUNE ANY CHANNELS - ONLY HAS SNOW
CHECK/REPLACE Y7401 (P/N# 182839)


RCA
N/A
CTC176
NO HORZ. SWEEP - ONLY HAS ONE VERTICAL LINE
CHECK/REPLACE C4403 (PART NUMBER VARIES DEPENDING ON CRT)


RCA
N/A
CTC176
DISTORTED AUDIO WHEN TUNED TO NATIONAL WEATHER SERVICE
CHANGE C4705 WITH A 3300pF @ 16v (P/N# 221016)


RCA
N/A
CTC176
DEAD SET WITH NO SOUND OR PICTURE BUT HAS HIGH VOLTAGE
CHECK/REPLACE CR4704 (P/N# 207878),R4702 (3.3 P/N# 217315) AND R4517 (24 P/N# 217314)


RCA
N/A
CTC176
MENUS ROLL VERTICALLY ON SCREEN -- VERTICAL RETRACE ON THE TOP 3-4 INCHES OF SCREEN
CHECK/REPLACE IC4501 (TDA8172)


RCA
N/A
CTC176
DEAD SET OR INTERMITTENT SHUTDOWN
CHECK/REPLACE T4101 OR CHECK CONNECTIONS ON PIN 8


RCA
N/A
CTC176
PICTURE BLANKS WHEN FRONT PANEL MENU BUTTON IS PRESSED
CHECK/REPLACE C3113 (P/N# 195689) FOR OPEN

Thanks for yor help. In your response you were referencing chassis# ctc-176, my chassis# is ctc-167,is there a difference?
Thanks,
Jeff

Thanks for your help. Replaced u4501 and c4502,503 and 507. Problem still there. Found no Vcc on u4501,R506 is open. Would you know the value of this resistor?
Thanks,
Jeff

3.3 ohms desregard the posts,allthough they are semilar. if you need more info i have it.

3.3 ohms desregard the posts,allthough they are semilar. if you need more info i have it.

Please note this is a safety resistor and must be rep;aced by the same otherwise if the TV goes on fire and kills somebody, you face a manslaughter charge.