Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV1914 | TUNING DRIFT | Stations could be locked in, but then would drift off. Pin 10of IC201, AFT amp out was floating, and voltage was varying. | ||
| Sony | KV1747RX | DARK PICTURE | Color information was present but there was no luminance atoutput of IC341. Input signal was OK. | ||
| Sony | KV1713 | PICTURE DISTORTION | Short width - from 1/2 to 1 inch. Problem starts as PINproblem. Servicer then finds picture just a little short of width. Mayhave been like that for some time. | ||
| Sony | KP5040 | MECHANICAL MISOPERATION, GREASED SMALL GEAR SHAFT BEARINGS | The door would open only halfway and the motor would shutoff. The door would not close more than 2 inches before shutting off.There was no grease on the small gear shaft bearing. | ||
| Sony | KP5020 | OVERSCAN GREEN CRT | Green tube was overscanned. Traced problem to Q5337.Transistor was leaky from collector to emitter. | ||
| Sony | FD20A | DEAD, REPAIRED CRACKS ON BOARD | Set came in dead. No power, whether using batteries or ACadaptor. | ||
| Sony | KX2501 | WHITE VERTICAL BAR ON THE PICTURE, SEE CIRCUIT CHANGE BELOW | White vertical bar about three inches in from the left sideof the screen. It would go away when the PC boards were opened out tothe service position. | ||
| Sony | KV2649R | INTERMITTENT POWER ON/OFF, REPLACED D021 | Intermittent power on/off. Customer controls erratic.Found D021 leaky on MT board. | ||
| Sony | KV2649R | VOLUME LOW, REPLACED T205 | At maximum volume setting, the volume was about 1/3 ofnormal. Inspection of sound output signal at Pin 14, IC201, revealed avery low level signal. | ||
| Sony | KV2647R | NO SIGNAL RECEPTION ON CHS 11 AND 13, REPLACE IC-002 | Could not tune in chs 11 and 13. All other channels OK. | ||
| Sony | KV2647R | SHUT DOWN, POWER MODULE | Power module causing high B+, shutting the set down. Uponreplacing power module, noticed non-linearity in the bottom half of thepicture. Top half of the picture was fine. | ||
| Sony | KV2643R | SHUT DOWN, REPLACED D502 ON A BOARD | Unit would shut down when the voltage of D502 dropped below4.8V. In the schematic Pin 9 of IC501 shows 5V. Proper voltage shouldread 5.8V. In turn D502 would read 5.6V. When the voltage at D502dropped to 4.8V, waveform was distorted and unit would sh | ||
| Sony | KV2145R | WHITE H BAND ON THE SCREEN, R520 INCREASED IN VALUE | After ten minutes of operation, this receiver displayed aone-half inch white horizontal band at the top of the screen. Verticalsize and linearity were not affected. | ||
| Sony | KV2142R | SNOWY PICTURE, REPLACE D2214, Q2224, Q2220 & UHF TUNER | Snowy picture on all channels except Ch. 2. The reason youwould get a clear picture on Ch. 2 is due to the low voltage used onCh. 2 coming through the UHF tuner. | ||
| Sony | KV1952R | PICTURE DISTORTION, C544 OPEN | Set came in with narrow picture, pincushion distortion andvideo smearing. The 200 volt line measured about 140 volts. |