Sony Repair Tips
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Results: 20100
Results: 20100
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| 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. | ||
| 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 |