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 | CDP101 | Would not read toc | Would not read toc. i could hear something rattling insideunit when i took it out of the box. i found one screw inside that shouldhave been in the sled motor bracket. after correcting this, it still didnot read disc. output of ic403 (eye pattern) was | ||
| SONY | CDP101 | Stuck objective lens/coil assembly | The disc would eject before the toc could be read. focusdc drive out of ic204 (tp 10) was correct, but the objective lens in thetop was not moving. | ||
| SONY | XR77 | Defective ry301 | The left channel would intermittently cut out on am/fmfunctions during first 5-10 minutes. this at first appeared to be causedby a defective semiconductor. further examination revealed relay 301 tobe the cause. heating and cooling the relay confirmed | ||
| SONY | XR77 | Defective q105 | The left channel fluctuated between distorted low output andno output. we found q105 (muting transistor) leaky. | ||
| SONY | XR70 | Error in manual | Terminal marking for q303 as shown on pc board incorrect(emitter and base leads reversed.) the picture on page 6 of the servicemanual (supplement #1) is correct but it does not match the silk screenon the pc board. | ||
| SONY | WMD6 | Pinch roller support needed bending | C-90 tape (tdk) would not run properly through capstan andpinch roller. problem existed only on tdk 90 minute tapes. hi freq.would drop out-left channel would decrease in volume. tape wrinkleevident at capstan. pinch roller and capstan replacement do | ||
| SONY | TCK777 | Poor chassis ground connection | Low level hum in output. | ||
| SONY | TCK55 | Defective relay | Right channel meter erratically pegs accompanied by loud hum. | ||
| SONY | TCK44 | Q310 shorted | This unit had a squeal in the left channel, about 5 khz, itfirst appeared to be a ground problem but closer examination revealedg106/q206 muting transistors to be partially turned on. | ||
| SONY | TCFX500R | Bent tab on head chassis | Head deck would cycle up and down about 3 times after fwd button was pushed, then there would be a graunchy noise and deck would go into ff. | ||
| SONY | TCFX33 | Tape transport too noisy | After using above 3 units for 6 months, customers complainedthat the tape transport is far too noisy to enjoy their units. noiseseems to be coming from the plastic gear mechanism. applying some greaseto gears seems to help but not enough to satisfy cus | ||
| SONY | TCFX33 | No functions | No functions. checked and found supply reel table would notbudge. disassembled tape transport, cleaned and lubricated reel tablespindle (no part number in s/m). | ||
| SONY | TCFX7 | Part number not in manual | Unit would operate 3 seconds then stop. pl802 was found tobe open. the service manual does not list a part number for the lamp.research thru kansas city located the part number to be 1-518-343-81. | ||
| SONY | TCFX4 | Capstan and bearing not matched | This unit exhibited excessive wow/flutter at the beginning ofthe tape only. we found that the capstan and pinch roller were not matedcorrectly. changing flywheel and capstan bearing improved the situation.however we found it necessary to put a shim und | ||
| SONY | TAP7F | Defective ic101/102 | This unit was locked in the tape position. | ||
| SONY | TAF6B | Defective attenuator assembly | This unit had intermittent noise (popping) in the left channelonly with signal applied. we found the attenuator assy (volume control)making poor connection. this was an odd problem because it did not appearto be a problem with the control assy. it onl | ||
| SONY | TAF55 | All lamps open if one opens | All lamps are open. apparently when one of the lamps failsthe others also go when a peak is received. | ||
| SONY | STRV45 | Poor grounding | A lot of these units were coming in for intermittent shut-down. a very common cause was poor grounding (see diagram). the bestway of checking this was to use a digital meter on the 2v range. if thereis a problem the meter usually head 0.62v or more. | ||
| SONY | PSX70 | Open transistor | When unit starts cueing works. after that, the manualcueing does not work. there was a pulse at the base of q133 andcollector of q134 after that there were no pulses. | ||
| SONY | PSFL1 | Worn gears | When the drawer was opened or closed, erratic and noisyoperation was noted. |