Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2647R | RETRACE LINES AND RASTER PULSADE, HAIRLINE CRACK ON C BOARD | Raster was pulsating at a steady rate about 3 times persecond, retrace lines were visible, excessive brightness and video fading.Found a hairline crack on C board G2 line. | ||
| Sony | KV2647R | VERTICAL FOLDOVER, C508 | Set has severe vertical foldover on top of screen. | ||
| Sony | KV2645RS | NO OPERATION, REPLACED Q203, D202 AND R533 | No raster, no sound and channel indicator does not light up. | ||
| Sony | KV2645R | NO PICTURE, REPLACED Q006-8 AND D012 | No reception on all channels. Found no VC, no 12V at thetuner. All displays and addressing OK. Found Q006-8 transistors shortedand D012 defective. | ||
| Sony | KV2645R | DEAD, REPLACED C019 | Set would not turn on. Found C019 shorted. | ||
| Sony | KV2145R | NO SOUND, BROKEN LEAD ON OUTPUT TRANSFORMER | No sound. Inspection revealed broken wire from secondaryof sound output transformer to solder lug, right at the lug. | ||
| Sony | KV2145R | NO VHF, BT981 PRESCALER | No VHF low and high band, very intermittent. | ||
| Sony | KV1945R | INCORRECT TUNING FUNCTION, REPLACED IC004 | Only numbers 1 or 2 can be addressed on TV by hand unit.Operation on channel selection manually is OK. I found Pin 28 of IC004has 10VDC on it at all times. Waveforms on Pin 37 were normal but theamplitude of waveforms at Pin 14 were very low with all n | ||
| Sony | KV1914 | NO PICTURE | Unit would blank out approx. after 1/2 hour, sound stillnormal. By turning set off for a while and turning it back on, the unitwould again work for a shorter period of time and blank out. Found thatby freezing vertical output IC unit would function nor | ||
| Sony | KV1546R | SET WOULD NOT TURN OFF, REPLACED RL001 | Set would not turn off when power switch pressed. Brightnesslevel would drop but would not turn completely off - intermittent problem. | ||
| Sony | KV1545RS | SHORT RANGE REMOTE OPERATION, REPLACED D1 | Customer complained of short range, approx. 12 feet. | ||
| Sony | KV1543R | NO TUNING MEMORY, REPLACED C047 | Customer pulled AC plug from wall outlet during electricalstorms, had to reprogram tuner (lost its memory). C047 a 100pF capacitoron the WRITE/ERASE line (Pin 6 of IC034, CX761) defective allowing pinto remain high after AC disconnection. | ||
| Sony | KV1221R | SNOW PICTURE, REPLACED C038 | Every 2 weeks picture would go to snow and remain in onechannel position. Tuning functions totally inoperative and manual channelselection would not work. Volume up and down functions OK. Clock osc.waveform wrong also voltage at Q034 base 0V should be | ||
| Sony | KV2645R | AUDIO HISS NOISE, REPLACED IC401 | Left channel of matrixed side had distortion plus somebackground hiss, right side sounded good. Disrotion showed up mainlyon music, and background noise only showed up when no voice or musiccame from TV. | ||
| Sony | KV1945R | DEAD, REPLACED FBT AND OTHERS | Set had a bad flyback causing multiple problems such asshorted horizontal output transistor and B+ regulator. |