TV Repair: Common Faults and Solutions.
Search:
Results: 87420
Results: 87420
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | SLHFR90 | Servo adjustments in manual incorrect | Test point for betascan drum speed adjustment (p. 202) isincorrect. also, x-0 jitter adjustment is impossible - can -hq comments: correct test point for betascan adjustment is ic021 pin 5.x-o jitter adjustment is not necessary due to servo improvement | ||
| SONY | CDP70 | Display indicates all zeros | Display would not function, all zeros displayed at alltimes. all other functions were ok. inspection revealed no clock pulseson pin 37, ic106. | ||
| SONY | CDP203 | Rf pll alignment correction | Service manual says to adjust l201 for 4.3218 mhz. i believethis to be in error and l201 should be adjusted for 4.2818 mhz. -hq comments: you are correct. i will issue a s/b. | ||
| SONY | EVC8U | No video pb | 1) unit had no playback video - just intermittent flashes.2) poor sync and rainbow in picture. | ||
| SONY | SL5200 | Color beat during playback with audio in connected | Color beat on monitor only during p/b when audio input isconnected (e-e is ok). | ||
| SONY | EVS700U | Video drop-outs after repeated playback | Customer complaint: after repeated playback of a section oftape, dropouts develop. 1/4 inch diagnal scratches found near center oftape. not sure if problem develops during cue/rev or pause. unable toduplicate scratch at ssc. | ||
| SONY | CFS700 | Wrong part # in s/m | Customer says part supplies does not match part in unit. seeletter from customer. -hq comments: the correct p/n for the spring is 4-854-771-00. a s/b wasissued - tape recorder #204. | ||
| SONY | AIR8 | Screw part # | Customer has ordered part twice, and insists that it does notfit. part # on part matches that in s/m. is it possible that there is atypo in s/m? have tried to verify but do not have this model in shop. -hq comments: steve, i checked with kcp. last s | ||
| SONY | WM75 | No p/n - packing material, headphone jack | No p/n for rubber packing which goes in the headphone jacks. -hq comments: p/n is 3-326-140-01. we will issue a s/b. | ||
| SONY | CFS950 | No p/n - rubber gasket | No part number for rubber gasket that fits into (cabinet assy,front) ref #28. -hq comments: this item does not come separately. you must order thecabinet. we have asked tokyo to provide it in the future. | ||
| SONY | CDXR7 | Noise from unit when powered on | When unit is powered on with disc off (tuner on, disc in orout of unit) noise is emitted from optical pick-up. noise is generatedfrom stator board. turning spindle by hand increases/decreases level.moving the disc table up or down on the shaft increase | ||
| SONY | SLHF900 | Fm modulator deviation adjustment | Rv207 had to be replaced. deviation alignment on page 274requires a spectrum analyzer. | ||
| SONY | SLHFR70 | Interference | Interference when vcr off and tv on active channel 3 (2 and 4not affected). interference rolls through picture, flashes when clockflashes on vcr display. scope shows interference on pins 14 and 15 of ic1power supply. problem appears only 5-10 min. aft | ||
| SONY | KV2680R | Low audio, replace vol buffer q-1126 on x board | The unit had very low audio on all functions. we found theproblem to be caused by a defective volume buffer/q1126. | ||
| SONY | SL20 | Scanning would not stop on channel | In channel up or down mode, scanning would not stop onchannel. scanning continued to end of range. h sync pulse to systemcontrol ok. | ||
| SONY | WMF75 | Intermittent auto reverse | Spurious auto reverse. the shut-off lever (b) was sticking. | ||
| SONY | ITA500 | Operation of transfer mode and out mode | Customer complains of line capture in 1 1/2 rings and calltransfer - if line busy ita-500 waits 1 hr to recall. can this time bechanged? -hq comments: these operating parameters are programed into the micro-processor. they candesire concerning these a | ||
| SONY | KV1396R | No audio, replaced r255 | This unit had no audio. the collector resistor for q252 wasopen although it does not show a resistor number in the schematic. it ismarked r255 on the board. | ||
| SONY | KV2697R | Problem with factory installed modification, q-102 leaky | Unit would turn on and off with front panel. no other functions would operate. remote hand unit would turn set on but not off. no other functions on remote would work. set came on displaying aux. | ||
| SONY | SLHFR70 | No tuning | Would not tune, no memory. |