TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	WMF75	Both sides of tape are heard	Both sides of tape can be heard regardless of forward orreverse play mode.
SONY	KV2681R	Dead, resolder t-501g	Dead. set does not turn on at all. no signal at base ofhoriz. out. q504. however, there is signal at q503 collector.
SONY	KV1913	Shut down	Customer had unit into fsc four times for regulator failure.found hvr assy cracked. set has been operating for three months withoutfurther failure of regulator.
SONY	CCDV8	No drum rotation	No drum rotation. signals reaching drum drive ic.
SONY	CCDV8	Power on/off ok, all other functions inoperative	1) power on, drum rotates for approx. 10 sec, then eject ledblinks. all buttons inoperable. 2) capstan motor would not rotate, unitwould only thread/unthread. this occurred after repair 1) was performed.
SONY	CCDV8	Rewind button inoperative	1) rewind and review inoperative using rew button (p/b ok).after cue (ff button) is released, unit automatically enters review mode.2) p/b picture noisy.
SONY	CCDV8	Tape jammed intermittently	Motor intermittently won't start unless rotated manually.
SONY	CCDV8	Playback jitter and noise	Cleaned, no help.
SONY	CCDV8	Pins bent on 24 pin connector	Pins 23 and 24 were bent. -hq comments: pins 23 and 24 are not used on the multipin connector.the recommended solution if pins 23 and 24 are bent is to cut them off atthe base.
SONY	CCDV8	Intermittent no function	Osc change frequency.
SONY	CCDV8	No eject	Frozen motor.
SONY	XR66	Non manual autoreverse	Unit will auto reverse at the end of the tape but not whenthe front panel buttons are pushed.
SONY	CCDV8	Playback picture unstable after 1 - 2 hours	After approx. 1 to 2 hours of operation drum and capstanservos would become erratic. picture would jump from side to side andtracking noise would appear. also, capstan would not run at all. inter-mittent capstan (from play or rec mode) would cause shu
SONY	SL2500	Rewind problem	Close inspection of enclosed upper drum revealed a slightimperfection (marked). replaced again ok.-hq comments: we will evaluate this sample and inform you of our results.
SONY	D5	Static after 10 to 30 mins	Unit has static after warm-up.
SONY	CCDV8	No eject	Unit came in with tape jammed inside. i found that the unitwould not unthread, it would play fastforward and rewind.
SONY	CCDV8	Shut down after 5 seconds	This particular unit was going into shutdown. after 5 secondsof play, the unit performed all function for that 5 seconds. the onlytime the unit worked without shutting down was on still.
SONY	BMC550	Noise in audio on quiet scenes	Customer complains about background noise from auto focus andmechanism. cs-5 board changed. -hq comments: due to the proximity of the microphone to the focus andzoom motors, acertain amount of noise is unavoidable during quiet scenes.reducing the gain
SONY	CDP102	Wrong motor coil wiring	Motor coil wiring is wrong for l152-2 on hook up/board layoutpages. this coil is shown connected out of phase. copy of page 40/41 ofcdp-102 manual attached. note corrected copy. -hq comments: confirmed the wiring of l152-2 should be crossed as youfou
SONY	SL2700	Cross talk	This unit had bad cross talk on both channels. the outputsfrom the band pass filters was not clean. bpf-801/802/901/902 wereall bad.