Sony Repair Tips
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Results: 20072
Results: 20072
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| 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. | ||
| 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. |