TV Repair: Common Faults and Solutions.
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Results: 87413
Results: 87413
Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| 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). | ||
| SONY | STRV25 | Error on pcb silk screen | Q605/655/606/656/607/657/608/658/609/659/610/660/612/613/614/615/616 are all marked wrong on pc board. | ||
| SONY | STJ60 | Defective nor gate | Normal output levels on pins 1 and 7 of ic302 (audio ampoutput) relay will not turn on - no output. q404 was 15.5v potentialshould be near 0v when relay activates. voltages on ic401 pins 8, 9, and10 was all 0v nor gate defective. | ||
| SONY | M203 | Defective c122 | Newly made recording had low playback volume. led indicatedexcellent sensitivity during recording but playback was low. previouslyrecorded tapes were ok. | ||
| SONY | ICFC11W | Defective q11 | Brightness control does not work. voltage stays the same on2 leads of the brightness control. base voltage of q11 too high. | ||
| SONY | TCM600 | On replacing switch | R/pb switch actuates comes off of lever actuated by recordlever that is supposed to change switch from play to record. rivets thatattach arm to lever are apparently not long enough or not secured well. | ||
| SONY | TCM121 | Lock plate shaft needed lubrication | Auto stop was working intermittently. | ||
| SONY | TCM111 | Clutch spring causes noise | The mechanical vibrations of the creaking forward clutchwould be picked up by the build-in microphone when recording. the creak -creak - creak sound would be amplified and cause the audio agc to dropdown. the playback would be of the creak - creak - cr | ||
| SONY | TC630 | Substitution for playback head will not fit | Original part is substituted to pp102-2902e. it will not mountin machine with supplied hardware. -hq comments: part number now correctly subs to 8-829-129-20(pp102-2902)and applies to serial numbers 124,701 and higher. for serial numbers below124,701, u | ||
| SONY | TC165 | Phase capacitor must be changed | Installed new motor in the machine and after 15 minutes itoverheats. there are 3 units with the same problem. -hq comments: this unit normally operates at 108 degrees f whenreplacing original motor with replacement 8-832-414-11 (ic414s) change thevalue | ||
| SONY | TCK75 | Tension incorrect | The first section of tape (5-15 minutes) is being wrinkled orcreased. after a certain amount of tape has wound on to the take-up reelof the cassette the problem is eliminated. the wrinkling (transverse)causes drop-out of signal and also loss of high fr | ||
| SONY | TCK35 | Rough spot on fr limiter | In fwd or rew, when unit gets to end of tape, r1008 will gethot and twice r1008 opened for customer. found flywheel to be almoststopping drawing around 180ma. | ||
| SONY | TCK6 | Lock plate binding | Eject, f/f and rewind defective, while stop, fwd, record andpause work normally. |