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 | 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. | ||
| SONY | TCK2A | Defective d306 | Unit came into fsc with complaint of no record or playback,erase ok both channels bad. power supply check showed correct b+ voltagesfor amplifier circuits. muting transistors q103, 203 were not turningoff. q303 (muting driver) q103, q203 all ok. foun | ||
| SONY | TCK1A | Replacement trans don't work | Q101 and q102 (q201 and q202) are both 2sc900e transistors.these were ordered and 2sc1362 were shipped as subs. they do not worknone of the subs listed work. in the parts list of the manual a 2sc1362(8-729-665-45) is listed. -hq comments: the beta ran | ||
| SONY | TCK1A | Incorrect p/n | Listed motor on page 24 of instruction manual shows incorrectpart number. | ||
| SONY | TCK1A | Crack in pcb | Several units had no indication of record led in record mode.this is not due to defective record led. the problem is caused by a breakin plating, on the record led circuit board. | ||
| SONY | TCK1A | Same p/n for different numbers | The p/n for the record button is the same as rew/ff/play. itshould have a diferent number, as the original has a red mark on thebutton and the play/ff/rew do not. -hq comments: this information can be found in the july 1979 technicaldigest on page 4. | ||
| SONY | TAN88 | Defective components on power supply board | Complaint was intermittent noise in left channel. speakerrelay would not stay on. found l-ch waveform at tp1 at b-level, r-chwaveform erratic. | ||
| SONY | TAN88 | Broken pcb traces | R-ch won't work. | ||
| SONY | TAN8550 | Missing connection | Dc balance circuit in class a amp board does not function.due to missing plating in ground line circuit. this in turn supplies dcvoltage on 0 volt line which in turn causes vfet failure. also i feelthat if the value of rt701 22 kΩ dc bias adjustment |