Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV8100 | UNIT SHUTS DOWN | When turned on, unit would shut down. Isolated problem tothe 22 volt line. It was reading 27 volts. Found Q602 regulatordriver leaky. | ||
| Sony | KV3000R | UNIT COULD NOT BE POWERED ON | Unit could not be powered on. Inspection revealed lack of12 volt DC to control circuits. | ||
| Sony | KV2650RX | NO PICTURE, REPLACE IC002 | VC voltage on chs. 2/3/4 was low - below 2 volts. Chs. 5/6and all others were fine. Found 4 volts at Pin U on tuner. | ||
| Sony | KV2647R | PICTURE DISTORTION, REPLACE C508 | Vert. foldover and decreased vert. deflection becausecapacitor (C508) failed. This same capacitor is also failing in othermodels and quite frequently. | ||
| Sony | KV2647R | S/M CORRECTION, VOLTAGE AT IC-302 AND IC301 | Pin 8 of IC302 and Pin 3 of IC301 show two different voltages,although they should show the same if they are directly connected, asshown on schematic. -HQ COMMENTS: Your are right. It should be the same (7.2V). | ||
| Sony | KV1954R | SQUEAL, REPLACE L502 | Customer complained of squeal from unit. Servicer could notlocate as problem did not show up when in service shop. Worked withservicer and found we could duplicate problem by putting very slightpressure on the coil. | ||
| Sony | KV1943R | DEAD, REPLACED BRIDGE DIODES AND FILTER CAP | Four times within the past 3 years customer has had to havelow volt diode replaced. Found that only one diode at a time was beingreplaced. Found filter cap leaky. Replaced all 4 diodes along withthe filter cap to help prevent further customer aggravat | ||
| Sony | FD20A | NEED P/N FOR REMOVING PIN FACE SCREWS | Servicer has requested P/N for tool to remove pin face screws(P/N 3-314-055-00). Tool kit catalogue recommends three types7-700-731-11, 7-700-731-21, 3-832-391-00. Will any of these tools do thejob or are we coming out a new tool? -HQ COMMENTS: A pair | ||
| Sony | XR65 | MALFUNCTIONING IC303 | AMS worked. Display would not light up. IC303/Q outputalways low. | ||
| Sony | XM1 | OPEN Q210 | After 20-30 minutes of running normal it distorted L. ch. | ||
| Sony | WMF10 | INCORRECT SOLDERING OF TH901/R904 | These units displayed erratic or intermittent speed control.The problem is with the connections on R904 or TH901. These parts arenot properly soldered to the board and are occasionally offset. | ||
| Sony | WMF8 | PLASTIC EJECT LEVER SHEARS OFF | The eject lever shears off at the end driven by the STOP/EJECTbutton. The WM-11 eject lever is made of metal. Can we substitute? -HQ COMMENTS: Use the metal eject lever in the WM-F8 instead of theoriginal plastic one. | ||
| Sony | TCFX510R | MALFUNCTIONING IC601 | This unit would intermittently go into reverse and the counterwas inoperative. We found IC601/System Control IC to be defective. | ||
| Sony | TC78 | LEAKY CONTROL TRANSISTOR | There was no sound coming out in PB mode. | ||
| Sony | STRVX750 | CORRECT SETTING OF 4/8 OHM SWITCH | Found L802 open twice. Upon talking to customer found he wasusing 8 ohm speakers. Found IMP SW on back of unit in 4 ohm position. -HQ COMMENTS: With the 4/8 ohm switch in 4 ohm position, a loadimpedance of T903 is lower than that in 8 ohm position, ma |