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Sony Repair Tips




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Search: sony
Results: 20072
Make Model Symptom Problem Solution By
SONY KP5000
Incorrect function for tuning, q2211 leaky During programming unit would not stop on active channels in one direction from low to high.
SONY KV2644R
No tuning lock, replaced c219 Would not lock on to any channel in program. aft voltage pin#10, ic201 down to 0.4v.
SONY KV2643R
Channel drift, replaced ic2003 Set would drift off channel during operation. found ic2003(display memory) apparently loading control ic and changing pwm voltage.
SONY KV2643R
Retrace lines, broken land on c board Servicer informed me of a problem where the picture would benormal and then get brighter and go into retrace and then back to normal.then it again would repeat itself.
SONY KV2643R
Dead, remove jw54 and others No operation above 100vac. h. voltage was at 23kv. servicerhad replaced flyback and ic501. voltage to shutdown circuit was 5.7v.removed l801, h. voltage went up to 26kv. -hq comments: we will publish updated info on this problem shortly. asfor now c
SONY KV1714
No video No video. just snow only. but if you adjust the tuningselector you can get ch. 7 and ch. 5 but if you go back to ch. 5 thesignal in ch. 7 will be erased. no -24v power supply.
SONY KV1543R
No station selection, replaced ic032 Stations wouldn't select and sound would turn up but wouldn'tgo down.
SONY KP5000
Changes channel by its self, replaced infrared sensor Unit would change channels without manual or remote activa-tion. customer indicated that remote functions would not coincide withremote hand unit when warm (this problem was intermittent).
SONY KV2643R
Retrace lines, replaced cx556 Set would gradually change from normal to retrace lines.video signal on output of cx556 changing level.
SONY KV2601
No sound, replaced ic033 This customer has a lot of static from carpets in the home.a spark jumps from her finger each time she touched the channel selectionbuttons. this time it took out ic033. the last time ic2001 failedcausing no sound. on the ic033 pin 10, ch. bias voltag
SONY KV2601
Picture drift, replaced c516 Dealer expressed concern over the fact that although thevertical was normal and the vertical hold was ok, the position where thepicture locked in was not in the mechanical center of the control infact it was to one end of the control.
SONY KV1712
Dark picture Raster very dark. chroma information present but no y signalat output of y amplifier. i found dc level at pin 14 of ic401 was veryhigh and no video here as viewed on scope. disconnecting pin 14 from pcboard restored the video signal at pin 14, ic401.
SONY KV1543R
Neon does not function, see below No function of neon bulb (nl15) on remote or manual commands.all other functions work. found only 75vac at junction of r018 and r017to ground.
SONY KP5000
Will not stop channel search, replaced c159 In the program mode, set would not stop searching when astation was tuned in. m-15 on the m board had the required horizontalpulse. m-9 on the m board had the sync pulse. the positive and negativeaft voltages on pins 1 and 2 of m-8 appear to be normal
SONY KV2643R
Weak picture, replaced leaky c208 Set had weak video with sync problem.
SONY KV2643R
No tuning, replaced ic033, cx804 After pressing channel button j none of remaining channelscan be manually selected until remote selection is used, at least once.
SONY KV2643R
Picture blanking, repaired cracked foil This unit would rhythmically go from good picture to excessbrightness with retrace lines then to black screen. this would happen atabout a 7 second interval. this would happen continually as long as setwas turned on. the collector voltage on q704, 705
SONY KV1543R
Channel search doesn't stop,replaced parts below All indications were that set would tune properly but wouldovershoot each channel. result was unstable sync and in general poorpicture quality. pin 10, ic201 (cx555) aft was reading approx. 9v vs2.5v. at pin 2, ic033 (cx804) was reading approx. 10v.
SONY KV1543R
No remote function, replaced ic001 Remote does not work, manual ok.
SONY KV9300
No control of brightness No control of brightness, excessive brightness even withscreens and drives down, voltages ok in abl drive circuits. also incolor.