TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KPR36XBR	Rgb characters stay on, replace ic-103 p/n 8-759-944-04	Rgb characters keep popping on and stay all the time.
SONY	XM120	Schematic error	The unit does not match the schematic or supplement in thearea of the speaker protection. the unit has a protection led plus theold circuit of q501, 502, 503, 504. can you supply me with a print ofthis version? -hq comments: it is possible that the pr
SONY	STRAV500	Incorrect part listed	The manual lists ic-701 as an stk4211v/8-749-920-17. the icin the unit is an stk4191v/8-749-941-50. does this unit use both or isthere an error? -hq comments: the power ratings for the two units are different and thusdifferent output ics are required.
SONY	STRAV650	Service manual part number error - main pcb	When above part number is received, it will not fit. theconnector plugs are different. investigation revealed that thea-4410-262-a board fits the str-av580/590. it was listed in the str-av67/650 manual. i found that the correct part number for the ma
SONY	GV8	No sound in tape mode	No sound in tape mode.
SONY	CFD5	No operation	Unit will not operate. servicer checked for fok at pin 1, ic-1. when the scope probe is on pin 1, the unit works. if scope probe isremoved from this pin, the set will not operate. servicer placed 10mΩresistor from pin 1 to ground and set works ok.
SONY	CFSD550	Play button jams	Plate under head deck is warped. also s/n 59900 and 60492. -hq comments: kcp has an improved part. please exchange the play lever.
SONY	EVS800	Unit keeps ejecting tape and does not thread tape	Tape does not load when closing cassette compartment, goesdown and does not thread tape - tape keeps coming up and out.
SONY	STRAV67	Service manual part number error - main pcb	When above part number is received, it will not fit. theconnector plugs are different. investigation revealed that thea-4410-262-a board fits the str-av580/590. it was listed in the str-av67/650 manual. i found that the correct part number for the ma
SONY	KV27DS20	Locked in sleep mode, replace r-1569	Locked in sleep mode, no picture, no audio.
SONY	KV2786R	Picture dark, replace r-504	Picture very dark. voltage at pins 24, 25, 26 of ic-301 was.8vdc at normal brightness and contrast level adjustments. all othervoltages on this ic were as per service manual. q-305, abl-1, was off,with a 9v dc on collector q-304, abl-2, was off about
SONY	KV27HFR	Picture pulled in from all sides, replace r-655	135v line b+ was 117v which caused all four sides of thepicture to pull-in.
SONY	BMC550	Part number for a.c.e. assembly	I would like the part number for the complet a.c.e. assembly. -hq comments: the part number is a-6736-048-a. a supplement will beissued soon.
SONY	AVU270	No tv function, no tv channel display	Indicator lights when tv button is depressed, however, tvchannel indicator is not lit and unit will not accept any tv commands. novideo out at tv monitor position. all other functions working normally.
SONY	KV1746R	Replacement vertical out chip	This chip is being replaced with upc 1488 - p/n 8-759-113-05.it is being supplied as a kit consisting of the chip wired connector andadd-on 47pf capacitor. however, when mounted in set there will be somevertical lines in picture as well vert hold proble
SONY	KV27TR21	No sound left channel, connector a6 became unpluged	There was no audio on left channel as plug a6 had become un-pluged.
SONY	CDPC50	Will not play track 7 on any disc	Unit would not play track 7 on any disc. would play no. 7 ifyou press shuffle and then no. 7. or, you could keep play button on unitdepressed until about 3 seconds of track 7 was played and it worked ok.otherwise, the unit goes to track 7, plays 1 seco
SONY	KV2793R	Picture snowy, replace q-1402 9v regulator	When the cable to tuner was removed and half way insertedinto tuner, picture was clear plus video inputs were snowy.
SONY	KV2726R	Narrow dim raster (pin-cushion distortion), replace r-512	Narrow dim raster exhibiting pincushion distortion along with-554 overheating on the (d) board.
SONY	KV2726R	Dead set, replace t1505, q1502, ic651, r651 and r605	Failure of r605, r651, ic651, q1502, t1505 claim no.dm39461-4/aid electronics - indy. -hq comments: thank you very much for your report.