TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	STP7J	Reset problems	When powered on, sometimes display is messed up. resettingic603, pin 7 would restore operation.
SONY	ITA500	Ring level	Customer complains that ring level is too low. this is thesecond complaint on this unit.
SONY	ITA600	Lock-up of phone line caused by ita-600	Unit passed all telephone analyzer tests. however, whenconnected to the phone line, intermittent lock-up occurred, i.e. phonegave busy signal and other phones on the same line could not be used. ahigh pitch whistle was heard and no dial tone was presen
SONY	EVC8U	Distorted video	Video looks very cloudy - no high frequency.
SONY	KV25XBR	Dead	Rgb and sleep light on, power up and would shut down. usinglowered line voltage set would run. looked at h. out and found ringingwaveform. found one of damper diodes with very high leakage.
SONY	KX2501	H squeal and misconvergence, replaced hvr and l504	Unit had h squeal. also, found when unit was cold, it hadmisconvergence on edges of crt. after the unit warmed up, convergence wasok.
SONY	KV2649RX	Snowy picture, no channel light, replaced hpt	High band good, no low band or cable. no channel readout.found had no -30 volts, hpt open.
SONY	CCDM8U	No color during recording	The recording contained no color. found problem caused by nosubcarrier clock input at pin 17 of the ed-11 board. traced problem to apoor solder connection at ic771 on the vc-4 board. resoldering the pinsrestored normal operation. when camera section
SONY	SLHF550	Audio line outputs low in normal e-e mode	The audio line outputs were down 15db in the normal e-e mode.we found the problem to be caused by a defective ic501 on the sa-10 board.
SONY	SLHFR30	Intermittent loss of vertical sync	Critical or intermittent vert sync.
SONY	SLHF500	Picture loses vertical lock when warm	Intermittent pix lock up after two to six hours on playback.
SONY	CDP520S	Unit reads toc but will not go into play	Load disk and activate, scan lite comes on, reads toc, tableruns full speed, then nothing else happens.
SONY	BMC660	Auto focus	Auto focus runs in one direction - close up.
SONY	CDP70	Optical pick up	The original pick-up kss120c (p/n 8-848-016-01) now changeto kss121a (p/n x-4910-424-1) does not work in the cdp-70. when replacedwith the new pick-up, new laser diode does not light up. -hq comments: please refer to supplement no. 1, 1985 cdp-70. yo
SONY	CDXR7	Tech flash a009 - part number	Need p/n for buffer kit for fm tuner. -hq comments: we are sending a few pieces for your use. a s/b will beissued listing part number.
SONY	ITA500	Int or no dial tone	Int or no dial tone. incoming voice distorted and weak, unitshuts off before incoming message completed.
SONY	CCDV8AFU	No audio record	Unit would not record audio, but had good e-e audio. locatedproblem with freq. counter on pin 13 of ic401 on ar-1 board. i could notadjust freq. any lower than 1.8 mhz with rv402. i replaced ic401 butthis did not help. i found that the ground end of
SONY	BMC220	Color distortion: blues and yellows appear red	Tube had low output and was replaced. camera adjustmentscould not bring any blue or green colors, both appeared red. replacementof vc-3 bd also did not help.
SONY	CCDV8AFU	Intermittent operation of control motor	Blowing fuse ps601 intermittently. this motor should drawabout 60ma under normal operation, increasing to about 170ma at the end ofboth threading or unthreading (max. load). this one was drawing over 1.2ai have two units with the same problem.
SONY	CCDV8AFU	Color distorted	One pulse missing on ic707. ic708, cp-9 board (sync gen) alsoreplaced.