Sony TV Repair: Common Faults and Solutions.
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Results: 20067
Results: 20067
Sony Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | STRVX550 | Missing c654 | One channel appeared to be louder than the other. looking atchannels on the scope showed left channel boost in treble when basscontrol was increased. found that c654 was not installed at the factory. | ||
| SONY | STRVX4 | Defective c803 | The customer complained of low volume and distortion. wetraced the problem to low b+, we found c803/c804 to have changed in valueand leaking the paste out into the chassis. | ||
| SONY | STJX44 | Open resistor in pack | Unit came into shop with the complaint of no memory.checked unit, found that it would not remember channel settings. | ||
| SONY | PSFL77 | Defective switch | All functions were inoperative. we found pin 26/ic201(sys con) to be high with the tonearm in the rest position. the metalfingers on the tonearm position switch were bent and not making contact.a simple way to confirm a problem with the position switch | ||
| SONY | CFS500 | Transport jams | The unit's tape transport jams in the attempt to record forno apparent reason. button lock plate bar #352 is bent at the recordlever #344. -hq comments: i suspect abnormal customer force applied to the recordbutton while pressing another button at the | ||
| SONY | CDP101 | Break in foil | Although the unit played discs, there was no sound, no counterdisplay. gfs was high and the eye pattern was good. but there was nodata at pin 17 of ic503 (cx7934). | ||
| SONY | XR85 | Loading gear | Loading gear in unit is not being pushed back to mesh withdrive gear, therefore, the tape is not dropping. when pushed manually,the gear meshes and initiates the loading sequence. -hq comments: replacing the cassette loading gear spring (#335) shouldpe | ||
| SONY | XR70 | Pinch roller shaft | Pinch roller shaft loosening from chassis assy causing to eattapes and have speed changes. | ||
| SONY | XR70 | Defective q804 | Tape will not load (drop) properly every time it's loaded.lever assy in question cocks the drop mechanism when it catches onthreading arm shaft (p/n 3-573-870-0). -hq comments: when the cassette springs back out a little after beingloaded into the carri | ||
| SONY | WM5 | Leaky q101 | One channel dead on cassette, radio works fine. | ||
| SONY | TCM7 | On servicing | No way with unit opened up to apply power to any mode andobserve voltages gears operation or functions. we need some kind of jigso that audio board can be remote from mechanism and still be operated.this also applies to model wm-7 as well. -hq comments | ||
| SONY | TCPB10 | Shorted d301 | One servicer found no power in several unit. all of them hada defective bridge diode (d301). one of the rectifiers connected to thenegative side of the bridge was shorted. | ||
| SONY | STRVX550 | Defective ic301 | Memory would not hold functions. battery and power supplygood. | ||
| SONY | STRVX550 | Tuner not always function | Output would switch on and off. tuner would not alwaysfunction. display intermittent. | ||
| SONY | STRV25 | Defective relay | When the unit is cold, the speaker protection relay (ry601)clicks, but no audio comes out. opened the case of the relay and foundthe flux from pc board which was preventing the contact of the switchinside the relay. | ||
| SONY | STR454 | Open r447 | Preset memory would not take stations, no last stationrecalls. | ||
| SONY | SPP11 | Error in manual | The part reference is indicated on the printed circuit boardsare wrong. in the base unit, rv9 is marked r59. in the handset, c34 ismarked c37. this is one of the caps to be replaced during channel changemodification. | ||
| SONY | PCM701ES | Leaky d201 | Volume control appeared to be defective. it was noisy whenvaried. input to q201 always had a negative voltage present. this wascaused by a leaky d-201. | ||
| SONY | ICFC10W | Pop in audio | Pops in speaker when radio alarm is activated. seems to becaused when q4 is switched. there is dc differences between switchedgrounds. -hq comments: the mild pop prior to audio is normal and as you suspectedcannot be eliminated. further efforts to el | ||
| SONY | ICF9540W | Replacement switch is different | Legs of switch are too short. original is 11 mm. replace-ment is 7 mm. switch needs to stand away from board for proper operation. -hq comments: currently, a new number is being assigned to this am/fmband switch: t-998-029-91 |