TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	CDP70	Service manual errors	1) q102 collector is shown on the schematic to connect toq101 emitter. it actually is connected to b- as shown on the boardlayout (the emitters of q101 and q102 are tied together). 2) c132polarity is shown reversed on the board layout.
SONY	KV1311CR	Picture goes intermittly snowy, repaired broken etch	Intermittently picture would go into snow. by tapping theboard, picture would return. found the etch broken between resistor r-221and the tuner if output.
SONY	SL25	Wow/flutter beta iii	Wow and flutter in biii. forward and back tensions were ok.tension regulator arm was vibrating. by touching it, vibration and wow &flutter would be gone. after 2 or 3 seconds, vibration would begin again.
SONY	SLHF400	No picture in beta scan or pause	No picture when in beta scan or pause. screen showed blackhori bars and what looked like over driven agc. adjusted skew osc to 2xhori. picture came in on beta scan and pause. after a few min picturewould go bad again and had to be readjusted.
SONY	KPR4110	Ic-301 schematic error, no sb issued	In troubleshooting a blanking (no raster) problem. i foundset does not agree with schematic. measuring pin 38 on ic301, i found 9v,and q408 emitter reading 3v. traced circuit and found r431 does not con-nect to r428. the 3v on emitter seemed to come
SONY	SL2710	Loading & threading are very slow	Unit would load and thread very slowly. found loading motorgetting hot. also voltage on motor only 7.6vdc.
SONY	KV1365	Missing part number of plastic knobs	We need the part number for the plastic knobs that activates011/s012 channel up/down. is this only avaiable with the bezel? -hq comments: the knobs are only available with the bezel.
SONY	TC530	Part number missing-supply table	We need the part number for the supply table labeled a49 onpage 29 of the manual. -hq comments: ref # should be a9 rather than a49. p/n is x-3430-015-0.there is stock in kcp.
SONY	CDXR7	Sled will not return to inside of disc	Weak focus search. sled does not reset to inside of disc atturn on.
SONY	CDXR7	Unit stuck in radio mode	Pin 22 pd2 of ic803 was always high, leaving radio always on.
SONY	FV50TII	Wrong ref # in manual	Customer needs cannon, unimatch cord. s/m ref is 21, cordis ref 25. need to verify that picture is in fact ref. 25, part number1-557-544-11. -hq comments: cannon unimatch cord is part #1-557-544-11.
SONY	WM100	Wrong p/n	No such p/n. 8-759-012-32 is incorrect. 8-752-012-32 iscorrect. -hq comments: we will issue a s/b.
SONY	WMF12	Head is breaking off of bracket	The head is breaking off of the metal bracket. this isoccurring in new as well as slightly used walkmans.
SONY	CCDV8AFU	Emergency stop mode during cue/rev and ff/rew	Vcr plays back ok, but when you go into cue and review capstanmotor drags and never gain full speed then goes into shutdown. same thinghappens in rew or ff.
SONY	CFS700	Incorrect spring	Ref. #73 page 54 the spring we are receiving is a tension typenot compression type as needed.
SONY	CDP200	Wrong p/n	Parts list shows wrong p/n and description. incorrect correct ic203 8-759-993-53 lf353h 8-759-910-77 lf353n ic506 8-759-993-53 lf353h 8-759-910-77 lf353n ic507 8-759-993
SONY	BMC550	Unit completely dead	Unit came in, no function. checked all common areas concern,fuse links, etc. everything ok. found pin 38 ic001 always low. tracedproblem withΩmeter but unregulated b+ present on both sides.
SONY	CFSW400	Unit will not turn on when play button pressed	Cushion on switch slides closer to contact causing unit notto come on when play button is pressed.
SONY	SLHFR70	Scan	Unit tears out when in the cue/review mode. found 31.468 khzreading 34.878 khz.
SONY	KV25XBR	Purity changes with set direction	When set turned east, top right corner turns magenta, bottomright turns green. also slight cyan ring present on entire face of tube. -hq comments: smaller pitch crts require narrower landing tolerances.follow procesure: 1) face crt east, turn set on 2)