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SONY Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYTCK96R
Idler wheelAt end of tape unit will not auto reverse or shutoff. in thisunit the micro processor gets it's signal off the reel motor. at the endof the tape when take up reel was stopped at tend of tape the reel motorwas still dragging sending the pulse signals to
SONYTCK96R
Part replacement neededAuto shutoff and bi-directional playback is intermittent.
SONYTCK35
Rough spot on fr limiterIn fwd or rew, when unit gets to end of tape, r1008 will gethot and twice r1008 opened for customer. found flywheel to be almoststopping drawing around 180ma.
SONYTCK15
Modification neededThis deck produces short duration pops and snaps while playingtdk tape. (same tape works ok in other sony recorders.) -hq comments: please refer the attached s/b issued in sony canada and dothe same disposition. we will issue the s/b.
SONYTCK1A
Defective capacitorsComplaint was no pb both channels, rec vol. ok. first stageof eq amp was cut off, second stage saturated.
SONYHMK229
Main board not groundedWith the exception of a click in both speakers when unit isengaged, dial lamps and cassette motor running, the unit is dead.
SONYTCM121
Bracket needs bendingNo take-up in fwd play mode. the latch on the idler bracketsometimes doesn't go over the stub on the chassis but goes to the sideof it and jams there.
SONYTC630
Too much load on motor from mechanismServicer reports that replacement motors for tc-630 andtc-105 recorders do not have as much torque as original motor. -hq comments: we installed the motor which you sent for evaluation intotc-630d. the tape speed of the tape deck was originally +0.6t i
SONYTAF30
Hum in headphoneWhen tape monitor or any input switch is engaged, a hum isnoticed in the headphone output. problem occurs due to current flowingthrough common ground connections from pilot lamps.
SONYSTRV55
Cold solder connectionProtection circuit relay, ry701 would actuate intermittentlywhen volume was turned up from about 3 click-stop positions to the 9o'clock position.
SONYTCM121
Defective ic's 4140, upb4011No playback and no record.
SONYTCK1A
Drive belt gets stuckSeveral units came in with no movement at all. in all casesthe drive belt was stuck between the motor pulley and motor.
SONYSTRV4
Different transistor usedTransistor 2sd666a is used in the unit. however, the partsdescription has it listed as 2sc1811. a further check with the transistorsubstitution book did not verify that one is a substitute of the other.
SONYICFC21W
Fragile connectorThe connector used to wire the main board to the functionboard is too short and fragile. during repairing, any pressure appliedcan cause it to short or keep the radio on. it is also difficult tostrip and solder.
SONYTFM7720W
Broken connection on antennaNo a.m.
SONYTCK5
Disassembly instructions are missingNo disassembly instructions are given for removal of thebutton assembly.
SONYTCK2A
Defective record switchIntermittent high frequency oscillation. once started, the only way to stop it was to engage record mode and return to play. problem occurred only in play mode.
SONYTCK1A
Error in s/mP/n 8-834-021-xx for motor (d-02162) is listed in the s/m.however, a servicer found dnf-1001b motor, p/n 8-835-006-00, in the unit.which if either of these motors is correct for this model?
SONYPSX30
Detection lever jammedScraping noise. cause is detection lever had been jammedunder protrusion on bottom of cam gear in shipping and was permanentlywarped. this was touching the top of the magnet ass'y on the motor shaft.
SONYPSX30
Incorrect spacing of cam and gearThe gear (reject cam) will not engage. cause is the spacingbetween the cam and the gear on the motor shaft was excessive preventingthe clutch assy to be pushed far enough to engage the teeth. the spacebetween these gears was visibly greater than on oth