Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2649R | DEAD, REPLACED IC001 | Set would turn on but no function could be activated. If youpush for example ch. up it would immediately change 2 or 3 channels thenwould come back to the ch. It was on just before last turn off. | ||
| Sony | KV2648RS | MISSING R602 | Servicer found R602 missing from board. Looked like it wasnever soldered, as the holes were clean. | ||
| Sony | KV2643R | INTERMITTENT SHUT DOWN, REPLACED H STAT CONTROL UNIT | Occasional slight arcing could be heard and set would inter-mittently go into high voltage shut down condition. Inspection of H-statcontrol unit showed cracks in the plastic housing around the bottom cornerwhere one of the ground leads exists the unit. | ||
| Sony | KV2145R | RETRACE LINES ON THE SCREEN, REPLACE IC502 | Set had 6 or 7 retrace lines at top of the screen. I foundthat by cooling IC502 the lines disappeared. | ||
| Sony | KV2145R | INTERMITTENT CHANNEL CHANGE BY ITSELF, Q007 | Intermittently self initiates rapid channel changing. | ||
| Sony | KV1948R | BEAT INTERFERENCE, NORMAL | Beat interference visible on the screen during low VHF bandoperation. The beat pattern is composed of individual dots such as onewould see from digital interference. It only shows up on a weak rabbitear signal. It is the second harmonic of the power s | ||
| Sony | KV1913 | INTERMITTENT HORIZ. WHISTLE | This unit had a very intermittent horiz. whistle. We foundT502 to be vibrating. | ||
| Sony | KV1710 | INTERMITTENT LOSS OF PICTURE | Highly intermittent loss of picture and sound leaving onlygray raster. Loss would be from seconds to hours with no patterndetectable. | ||
| Sony | KV1515 | NO CHANNEL TUNING | Unable to tune channels 2 and 4, found VC drive transistorQ101 leaky, unable to bring voltage lower than 9VDC. | ||
| Sony | KV1207 | JAIL BARS ON THE SCREEN | Very dark jail bar pattern on screen. Bars were so darkthat they blanked picture where they were. Found horizontal pulses onthe +12V line at Pin 10 of IC301, and discovered leaky C323. | ||
| Sony | KPR4600 | NO SOUND, REPLACED IC-3010 | No sound, found switch voltage (4VDC) reading 1.5VDC onIC3010. | ||
| Sony | KP4600 | MIS-CONVERGENCE | Extreme mis-convergence on left and right sides of the screen(for about ten inches). | ||
| Sony | KX2501 | PICTURE FADES OUT WHEN EXTERNAL AUDIO PLUGGED IN, D1206 | Picture fades out when external audio plugged in. R675 openon GA board, R02 burnt on U1 board, Q1343 and R1409 open on BD board.Replaced these parts. Video would fade out when audio plugged to eitherext. input or multi-connector, measured 8.5 to 9.1 VD | ||
| Sony | KX2501 | DEAD, REPLACED DIODE ON "K" BOARD | EVP-1 ckt operational, shutting down PPS. Replaced open R675.Unit produced raster. Hooked up a VTX-1000R. Unit smoked and went dead.R675 open again, Q1343 open, R02 on U-1 board burned. Replaced all parts.Unit again functional. However it was found | ||
| Sony | KX2501 | SHUT DOWN, REPLACED Q652 ON "GA" BOARD | Either horiz. scan comes up and goes immediately to horiz.shutdown or does not come on at all. Voltage on Q108 relay drive base lowand relay will not activate when transistor completely shorted prior togoing bad would come up and shutdown within 3 secon |