TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	SLHFR70	Emergency shutdown in reverse skipscan, review modes only	In review and skipscan reverse, machine would shutdown.found no signal at syscon ic401, pin 8.
SONY	CDX5	Unusual operation when display, rew or ams key hit	Whenever i operate any of the keys, the following happens:1) display shows 0. 2) the cd mechanism goes into pause (led illumi-nates). 3) the sled returns to bottom of the rack. 4) muting relay ry451energizes. replaced the master cpu mb88501-298m with
SONY	KV2141R	P/n for trinitron logo rgb dots	Customer complains that she ordered speaker grille p/n4-323-603-00 and rgb trinitron logo color dots were not mounted. servicemanual shows them as mounted, no part numbers are given for dots alone.please advise of available complete, or p/n for dots alo
SONY	SLHFR70	No audio	Any combination of two channels can be tuned in, but onlytwo. no sound at any time. four units have been reported to have failedin this way.
SONY	BMC110	Poor focus	C15 1.5 x 160 leaking causing focus problem. -hq comments: c15 is used in the dc-dc converter. this capacitor inhv701 is connected to pin 3 (120v) which controls the focus regulator.your tape is being returned.
SONY	SRSF10	Incorrect part	Please note the enclosed parts. the control is correct exceptthat this unit requires that there be a screw mount instead of a shaft.screw #38 mounts knob #37 to it. please investigate this matter for meand forward the correct control. -hq comments: th
SONY	CDP101	Intermittent tracking	This unit had an intermittent problem tracking the disc.
SONY	KV1356R	Won't turn on, replaced ic-101	This unit would not turn on.
SONY	SL25	Excessive back tension - picture distorted	This unit at first appeared to have a capstan problem. onchecking further we found the back tension to be excessive. this wascaused by the brake solenoid not engaging fully.
SONY	HVC2800	Will not control vcr	When connected to a sl-2000/-2500/-2700, the camera does work.but when you push record, play, ff or rewind nothing will happen. nofunction on vcr. also, if you push record before plugging camera to vcr,the unit will go to record mode but the run/stop w
SONY	KV2670R	Vertical jitter on cable, replaced tuner and adj t-201	Vertical jitter up to 1 inch when connected to cable orsatellite antenna. off air signal ok. two sets with the same problem.dealer exchanged the set and problem presents on replacement unit. whenunit is connected to cable jitter, it was reduced to 1/2
SONY	ACV8UC	Audio hum from rf modulator	Rf modulator puts out noticeable hum in audio when operatedwith ccd-v8. hum evident in e-e mode and playback but won't affect tapesbeing recorded. this unit also has a q37 which does not appear on sb-dboard diagram or schematic. installed extra filter
SONY	BMC550	Service manual correction	Adj. 2-3-9 should read rv807, rv808. adj. 2-3-10 should readrv809, rv810. mr1-mb1 temp adjustment cv-1 board. mr2-mb2 tempadjustment cv-1 board. -hq comments: we will issue a s/b.
SONY	CDP102	Intermittent mistracking end of disc	Skips near end of disc. flex strip from fop touches bottomcase and hangs up.
SONY	SL5400	Bad picture	Symptom on tv screen would look like loss of interlace scan-ning with bending and tearing at top of screen.
SONY	SLHF900	Pinch solenoid won	Pinch solenoid will not hold after actuation. found 2sd1164installed as per schematic and parts list. however, we found that only2sd773 would work in its place. i believe that 2sd1164 is wrong for thistransistor (q416), judging by q414 and q418. -hq
SONY	XR65	Fm squeal	Audible screech when receiving a stereo signal. fm monothere was no problem.
SONY	SLHF900	Hum in audio when connected to cable and stereo	When connected to stereo system and cable, sl-hf900 wouldoutput hum from audio jacks. this would disappear if the rf cable wasdisconnected.
SONY	WMF18	No auto reverse	Unit will not auto-reverse.
SONY	XR780	No tape output	Audio output of tape section ceased after one month.infrequent intermittent operation after that.