Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | PTB500 | LOW LIGHT OUTPUT | Servicer complained that PTB-500 has a lower light outputthan PTB-100. -HQ COMMENTS: Specs are the same for both. As you related later on thetelephone, the unit can be operated on varied line voltages by a selectorlocated on the back of the unit. The | ||
| Sony | XR75 | INTERMITTENT/SLOW/NO EJECT | When the tray rises to eject, the ear with the brass rollergets bent over further and further until it starts to bind. This causesejection to become slower and more difficult. | ||
| Sony | STRAV260 | OUTPUT SHUT DOWN | Unit would shut down at about #7 on vol setting when cold and1-2 when hot. The output chip would get very hot. The SP output lines toground read 15K. | ||
| Sony | TCWR930 | HUM | Complaint of hum noise from B deck when recording both deckssimultaneously. | ||
| Sony | STRVX550 | INTERMITTENT FM | FM would fade, become static or dissappear. Had turntableconnected and would exhibit same symptom. Several repairs had been made. | ||
| Sony | STRAV460 | NO OUTPUT WHEN IN TUNER MODE/NO STATION MEMORY | All functions worked except no audio output when in tunermode. Unit would tune all stations but stereo indicator never came on.Found Pin 15 IC202 (MPX) was about 2.5V all times. Lifted D204 and audiocame up and stereo indication returned. Found IC301 | ||
| Sony | SLHF900 | NO CUE/REVIEW | Cue/Review inoperative. Audio mutes and capstan speedincreases slightly. Noticed C/R signal at base of Q523 (SS-53 board)would toggle, but no change at collector. | ||
| Sony | CDP302 | DISTORTED SOUND | Distorted sound, but tracking is OK, time display normal AMSand scan OK. | ||
| Sony | SLHF600 | HERRINGBONE PATTERN IN PICTURE | Herringbone pattern in E-E signal. Complaint on W.O. statedonly occurred when cold. We noticed that it was actually sensitive tomechanical shock. Tapping PS-39 board would cause problem to come and go. | ||
| Sony | AVH55ES | NO VIDEO OUT ON VIDEO 1 AND 2 | No video monitor out when switched to video 1 or video 2. V3,V4, TV all OK. | ||
| Sony | SLHF450 | TAPE PLAYS BUT NO VIDEO | No video and R309 (VA-14 board) overheats, no 5V on Q64.Measured a short on Pin 2 of CN8. | ||
| Sony | CCDV8AFU | NO CAPSTAN PHASE LOCK | Noise bar at 5 sec rate. Observed RF envelope expand to maxand diminish. By substituting ATF servo with power supply could stabilizepicture. All signals at ATF servo/IC106 appeared OK, but replacementsolved problem. Hint: wait for RF envelope to dimi | ||
| Sony | KPR4110 | UNIT SHUTS DOWN, REPLACED R-217 (E BOARD) | The unit would begin to power up and then immediately shutdown. We discovered that the problem was premature HV shut down. It wasbeing caused by R-217 being the incorrect value. There was a 33Kinstalled. 20K provided correct bias and allowed normal o | ||
| Sony | AVU270 | NO LOW STATIONS | The unit operated correctly except that it was not possible totune in the low stations. Eg. FM/below 94MHZ, AM/below 1020KHZ and TV/below #5. | ||
| Sony | KV2665 | INTERMITTENT VERTICAL JITTER WITH MOVIE TAPE, REMOVE Q-854 | When playing back prerecorded movies with copyguard the tele-vision would have an intermittent vertical jitter. All other modes workedfine - off air, generator, etc. By examining the sync in the delayed modeon the scope we determined that the vert. syn |