TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	CCDM8U	Servo circuits dead	Three units with same problem in ssc. you could load tape in and it would thread up but unit would do nothing else after this other than turn on/off.
SONY	STRVX750	Blowing inverter transistors in pp supply	Set had been blowing out q903/904 every couple of months.
SONY	STRVX5	Loose radio output	Unit would come on cold and radio functions were fine. afterapprox one hour, unit would loose all sound in radio modes and had nosignal strength indication. display was ok.
SONY	KV20XBR	Pic too white, q803 failure	Original problem was tube had shorted in neck also spark gaphad shorted. after replacing these servicer had picture back but whiteswere to white and gave on defenition.
SONY	KV25XBR	No on-screen display	At turn on set had display, but after a few minutes., display would go out. i had all correct inputs to display ic104 but no output after warm up.
SONY	CCDV8AFU	No chroma record	Unit would record no chroma. playback was ok.
SONY	SPKM8	Lens cover not available	Rubber lens cover shown to the left of item 9, pg 16 of s/m,does not come with item 9. this piece is also not included with thespk-m8. a customer, however, would like one to protect the lens. -hq comments: i checked with tokyo on this matter. this co
SONY	CFSW360	Missing part number	Need part number for ac line cord.
SONY	CCDV1	Pix breaks up	Picture breaks up on monitor.
SONY	CCDM8U	Auto stop	This unit would not stay in the play mode. it would gointo auto stop mode, after a short time. found x681 to be bad.
SONY	D7	Mistracks	Unit will not play beyond first track of test disc. unit willnot advance tracks at times (intermittent).
SONY	KV25XBR	Flashing in raster	Set would have flashing in raster when it was cold. aboutafter 20 minutes, flashing disappeared. by splaying coolant on componentsproblem was isolated to c1653.
SONY	KV2782R	Shutdown, replace c-681	Servicer said that b+ was only about 100vdc and if any higher,the set would shut down. by disabling control pin on regulator ic, hecould get b+ up to 135vdc and set would work ok. regulator ic and severalother parts had been replaced. i suggested that
SONY	CDP45	Intermittent mistracking	Rf waveform was ok except p-p voltage was 2.0v. checkedwaveform from ic201. gain down sw seemed to be on most of time.control signal to switch from ic202 pin 7 was high most of time. flexingckt board caused dc level to drop.
SONY	CCDM8U	Service manual	I do not find an electrical parts list in the manual orsupplements for the above board. -hq comments: because it is so difficult to troubleshoot the mx-2 boarddoes not have a parts listing but is offered as a replacement part p128service manual.
SONY	SLHFT7	Intermittent no beta hifi pb	Intermittent no beta hi-fi. flexing board would causeproblem to come and go. could not troubleshoot to component level.
SONY	CCDV110	Bad playback	Poor playback picture.
SONY	CCDV110	Dead - tape stuck	Found not power up unit.
SONY	SLHFT7	Lines in picture on some channels	Lines in picture on some channels.
SONY	SL100	No functions, tape stuck	No functions, pause light on all the time, with power on capsand drum both running.