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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYPSX800
P/n error in s/bIncorrect p/n listed page 54 of manual - p/n listed8-719-990-03 should be 8-719-910-03.
SONYPSX600
Defective ic105 and r170Zero balance drifts.
SONYPSLX500
Defective socketThe copper sleeves in the socket of the p-mount were pushedall the way back into the tone arm. i have received several reports onthis problem.
SONYPSFL7
Pins out of placeThe copper sleeves in the p-mount socket were pushed backtoo far to make contact with the pins of the cartridge.
SONYICFD11W
Missing ground jumperWhen frequency display button was pushed, frequency changedand the station was lost. this was the same problem as reported 2/16/82dk-2-1. it appeared to be a ground loop problem.
SONYICFC55W
Leaky c115Segment on right channel was not showing proper number. allsegments lite up although a 1 should be shown. found c115 leaky.
SONYICFC20W
Defective q4 and q5Either q4 was leaky or q5 was open. am on while switch infm position.
SONYICF200W
Open r36When the unit is turned on after a couple of minutes a clicking noise is heard at the speaker.
SONYCDP101
Out of alignmentHigh-frequency squeal through audio system with cdp-101 inany mode (stop/play/pause). checked completely and looked at output withoscilloscope. no high frequencies were audible.
SONYCDP101
Loose right rail on sledLoose right rail on sled. holder bracket missing.
SONYCDP101
Defective cx-79034Static noise in both channels after 8 to 10 minutes. foundnoise being generated at output of cx-79034.
SONYCDP101
Out of alignmentRumble in audio. checked unit and found no problem. problemcould be in software or playback system. did complete alignment for unit,focus servo slightly out of range. returned to customer.
SONYCDP101
Shorted wire-10 volt line (from cn542 to cn536) was shorted to chassisnear bracket (bottom) to the rear of the sled assy.
SONYXR77
Large distortionUnit produced large distortion during tape operation withoutboard display no. 'dpl -el.
SONYTCK81
High torque measuredAfter installing new take-up arm assembly, forward torquemeasures 55 to 65 q/cn. this may be contributing to tape skew problems,by requiring increased back tension.
SONYTCFX33
Problems around ic501Unit will not lock into play mode and the service manualschematic does not agree with its own board layout in the book andneither agree with the board in the unit. -hq comments: release from play could be initiated by reset pulseor slow oscillator (r-c
SONYTCFX30
Grounding spring neededIntermittent static noise was recorded when humidity levelsare low, erase and r/p heads were eliminated by grounding to chassis thisproblem occurs both on record and playback. -hq comments: 1) please apply grounding spring to erase head as outlinedin ta
SONYTAN88
Open c410The 78v line was reading about 110v on this unit and thesound was distorted. adjusting rt401 had little effect. we found c410to be open and causing the problem.
SONYTAF55
Shorted d406The 15v line was down on this unit. we found d406 shorted(located in regulator circuit).
SONYSTRVX6
Poor connections on q414This unit had a dim display and erratic tuning q414 was found to be poorly soldered on the base and emitter leads.