Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2680R | NO PICTURE AND NO SOUND, C-140 ON "A" BOARD | Problem was no picture and no sound. ASC hooked up thisKV-2680R P3 chassis to his RCA test jig model 10J106A using Telematicadaptor 10J733 (Color TV S/B #212). | ||
| Sony | XM120 | INTERMITTENTLY STAYS IN PROTECTION MODE | Unit would intermittently go into protection mode when turnedon, or while playing. Also when Acc power was removed, unit would go intoprotection mode and would not shut off. Unit continued to draw current. | ||
| Sony | KV1354R | NO PROGRAMMING, REPLACED Q-024 | Unit would not hold memory. When you set tunning switch on VCwould go to max. and green tuning bar was all the way across. Checkingaround memory chip IC-002/pin 2 had no -25V. Found Q024 open.Also found that Q-024 on some sets replaced with a 680 ohm | ||
| Sony | KV2670R | INTERMITTENT AUDIO, SPEAKER LEAD COLD SOLDER | Two units with intermittent audio caused by unsolderedspeaker leads. | ||
| Sony | SL2400 | POWER SUPPLY | Unit will not cut off with power switch or remote. This unithas a PS-34 and PS-35 circuit board (power supply). It is not UL listed.How do we get the correct service manual? -HQ COMMENTS: A Supplement-2 was issued in Jan 1984 which covers thePS-34 and | ||
| Sony | KV25XBR | RGB GOES ON BY ITSELF | RGB will turn on at sound vibration or by opening/closing ofcontrol panel. The unit sensitive to vibration has its RGB buttontouching the switch and just slight vibration will turn it down. | ||
| Sony | PST20 | P/N FOR HEADSHELL | We need a P/N for the headshell of PS-T20. Page 22 of themanual shows it but only gives P/N for cartridge. -HQ COMMENTS: The P/N for the headshell is X-4857-616-0. It is listedon page 38 in the service manual (for US and other destinations). | ||
| Sony | SLHF300 | NO OPERATION | Betamax would load cassette and tape. PLAY button was pushed,nothing happened. Tape could be unloaded. | ||
| Sony | FH7 | CABLE CONNECTOR | Need a P/N for a connector on Page 23. Itunit (equalizer). The one on the left side of the pictorial is the onewith no P/N in the manual. The connector is a 5 pin. -HQ COMMENTS: Part numbers for the cord with connectors are:1-556-475-00 13P one end m | ||
| Sony | KV1770R | FLYBACK ARCING | The flyback burned a hole through the side and shorted outthe horiz. output transistor. | ||
| Sony | KV1770R | H.V. SHUT DOWN | The unit would go into HV shutdown at approx. 100V appliedAC. Found R559/hold down to be cold soldered. | ||
| Sony | STRVX550 | IC301 SHUT DOWN | The oscillator on IC301 was not running. We found Pin 34 tobe low. This was caused by IC401/P19 staying high. IC401/remote decoderwas defective. -HQ COMMENTS: Actual POWER ON is equivalent to conventional units whenyou press SYSTEM POWER. Then the s | ||
| Sony | STRVX550 | DEAD - NO DISPLAY | No display. No clock signal at Pins 31 or 32 of IC301. Hold(Pin 34) of IC301 at 2.5V. | ||
| Sony | STRVX350 | NO MEMORY | Unit would not retain memory when powered off. HOLD line was7V instead of 4.9V at IC301 Pin 34. Found Q803 leaky. | ||
| Sony | KV25XBR | NO DISPLAY | Two problems: 1) volume changes activate RGB mode. Found RGBbutton jammed closed. 2) no channel/function display. Found L101 on theA board to be open. There is 5V active low info. present at IC104/P12. |