SONY TV Repair: Common Faults and Solutions.
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Results: 20066
Results: 20066
SONY Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SONY | STRV5 | Defective ic451 | No output, meter and lights operating, relay activates. b+and b- low. | ||
| SONY | STRV3 | Error in service manual | The schematic (page 20) shows bias test points incorrectly atcollector of q713 and q763. should be at emitters. -hq comments: see technical newsletter #8102. | ||
| SONY | STRV2 | Error in service manual | Vco adjustment page 9, procedure 2, adjust rt201 for 19khz+/- 100hz error. | ||
| SONY | ICFC310W | Modification for buzzer level | Alarm level very low. | ||
| SONY | ICFC11W | Clean and adjust switch | Alarm set time shows upon auto buzzer. | ||
| SONY | ICF7600 | Loose dial indicator | Dial indicator needle disconnects from the dial string. theunit will continue to tune radio stations but customer is unable to determine the station from the indicator. | ||
| SONY | CFS71 | Lubrication in switch assy needed | When the fast fwd/rewind switch is activated by the switchlever assy, binding of the two nylon pieces can occur. this causes themuting switch to stay in the on position. the audio is then greatlyreduced. this condition occurs most often when the ams f | ||
| SONY | CFM23 | Defective motor | Tape speed slowing - occasionally decrease in current tomotor. same decrease on external dc input. | ||
| SONY | TFM7720W | Broken connection on control | Volume control has no effect on volume - volume remains loud.removed volume control and it was working properly. | ||
| SONY | TFM7720W | Cold solder | No am on low end. | ||
| SONY | TFM6160W | Loose pulley | The tuning dial does not work. the pulley near the speakerpulls loose causing the dial string not to work. | ||
| SONY | TCS300 | Idler out of position | Spindle assy take-up reel will not turn in playback or recordonly. | ||
| SONY | TCK81 | Back tension torque adjustment | Back tension and tape path was incorrect. complaint of tape wrinkle on maxell tape. | ||
| SONY | ICK81 | Steel ball out of proper location | Tape jammed. found head deck wouldn't retract properly. | ||
| SONY | TCK65 | Defective ic802 | After operating approx. 1.5 to 3 hrs, the transport willstop - rewind - stop. the led display will then indicate 1 and none ofthe function switches have any effect. this is with rms off, with rms on- cannot be programmed. found pins 12, 13, 15, 16 of | ||
| SONY | TCK5 | Missing bushing | Both of these units came in with excessive wow and flutter.what causes this is the absence of a bushing which holds motor switchlever in place. without this bushing motor lever is allowed to movefreely and ends up meshing with the teeth on supply gear c | ||
| SONY | STRV55 | Leaky c412 | Am and fm very slow to lock on station - then drifts offagain. tantalum capacitor c412 in lpf was leaky. | ||
| SONY | STRV45 | Defective c412 | Tuning incorrect - am station at 920 khz, tuned in at1600 khz. no local on 1600 khz. fm tuning out of band and picking upmicroprocessor rfi. | ||
| SONY | STRV35 | Outputs open under load | The output transistors in these receivers were intermittentlyopening under load. all these were used with 4Ω speakers.re: jr0803 str-v35 listed did not have a979 failure. | ||
| SONY | STRV25 | Modification for reliability | 2sa979 transistor (q605/655) fails. -hq comments: see upcoming s/b: 100Ω emitter resistor gets replacedby 150Ω (also in technical newsletter #8110). |