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 | HMK3000 | Re-alignment of capstan gear | Tape would jam intermittently. by moving the capstan gear,unit would work. | ||
| SONY | CF450 | Substitution of power transformer | The above power transformer is now substituted by1-442-513-xx with a few extra leads and no installation instructions. -hq comments: the power transformer you have is for general export.the original transformer is 1-441-762-xx. this has been substitute | ||
| SONY | XR77 | Defective relay | Left channel cuts in and out during tape. | ||
| SONY | XM120 | Oversized capacitors | C607, 608, 609 are all one inch tall in original unit. partssent from kc are 1 1/2 inch tall which presents a problem in installationin pps board because of height. -hq comments: we have printed a tech. newsletter giving the part numbersfor these small | ||
| SONY | TCK71 | Capstan base assy | This unit ocassionally skews. we found that the left pin onthe capstan base assy was loose. | ||
| SONY | TCK65 | Capstan motor | We found the capstan motor siezed as a result of the rearbearing coming loose. this locked position caused the motor drives tooverheat and short which in turn burnt the board. | ||
| SONY | TCFX1010 | Error in manual | The system control schematic on page 49 shows the +5 volt lineand the -11.7 volt line connected together at the positive side of c773.the fly speck where the lines cross should not be there. -hq comments: when we need a s/b on this model for something e | ||
| SONY | TCFX500R | Gear wears | Unit makes grinding noise when reversing. intermittently willjam at same time noise is heard. gear is made of soft plastic. inreverse mode torque is too great and teeth pre-destroyed. | ||
| SONY | TCFX44 | Burr on cam | No fast forward. | ||
| SONY | TCFX33 | Error in manual | Several mistakes were found in the tc-fx33 preliminary s/mduring trouble-shooting use. i did not have time to check all connectionsand components but have listed the mistakes i did find obvious. | ||
| SONY | TCFX33 | Defective c580 | The ams solenoid would not consistently engage which resultedin the transport not locking into the play mode. we found the solenoidpre driver not turning on hard enough. c580 had appreciably decreased invalue which did not allow the base of c580 (sol. | ||
| SONY | TCFX30 | Defective reel motor | Motor noise was audible through the right channel. this was caused by excessive sparking of one of the brushes in the reel motor. | ||
| SONY | TCFX4 | Defective relay | One channel intermittently records and the sound duringplayback is muddy. | ||
| SONY | TCFX4 | Defective rv104 | The right meter on this unit stays on with all led'silluminated. we found rv104 (meter adjust pot) open. | ||
| SONY | TAF70 | Defective input jack | This unit had an intermittent hum on the phono input. wefound the input jack to be defective. | ||
| SONY | STRVX22 | Defective ic301 | This unit was locked on aux. we found pin 26 of ic301 have asteady 5.4v. | ||
| SONY | STRVX6 | Defective ic401 | This unit had no display or tuning action on am/fm. | ||
| SONY | STRVX6 | Dead | Dead unit. output transistors were shorted causing pulsepower supply to fail - replaced known defective components restoredoperation but bias current, after adjustment would start to increasecausing outputs to run hot. removed power before damage resul | ||
| SONY | STRVX6 | Overheating regulator | The +15v regulator overheated to the point where it burntthe board badly. after replacing the board and modifying according tothe service bulletin we still had a very hot regulator. how can we coolit down? | ||
| SONY | STRVX5 | Malfunctioning mute circuit | Upon turning power off, a slight popping sound through bothspeakers will be heard. by grounding inputs of main amp the popping iseliminated. an imbalance in the decaying time of the positive andnegative supply voltages can be seen on the scope. this r |