Sony TV Repair: Common Faults and Solutions.


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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYTCFX500R
Chassis head assy bentWhen put in reverse it only cycles and you cannot remove tapeuntil ff is depressed because the head assy does not drop down completely.
SONYTCFX500R
Worn gear assemblyClattering in transport, especially when changing directionwas the complaint. upon my investigation i learned that the noise onlyoccurred when direction of play was changed.
SONYTCFX500R
Stripped gearsDriving and forward cam gears stripped. head chassis appearsto be free and operation not excessively stiff when moved by hand but thedealer has only sold 3 units so i have not enough to see if it is a trendof failures.
SONYTCFX44
Capstan shaft had to be tiltedA few seconds after engaging play mode, the tape would skewtoward the chassis and wrinkle. on two of these units, this would occurintermittently.
SONYTCFX33
Levers out of positionIn playback or fast forward, there was no tape motion andthere was the sound of gears clattering. the reverse select lever and thebushing select lever were both out of position. it appeared as if someonehad previously worked on this unit.
SONYTCFX30
Aged resistorUnit would slow down in rewind and fast forward modes whendolby c was turned on.
SONYTCFX22
Idler wheel bindingPlayback was very slow.
SONYTCFX22
Bend in slider neededTransport fails to have take-up in playback or record mode.transport is excessively noisy and will not engage into ff smoothly.all of this can be caused by slider (355) being bent causing ff lever(305) to have incorrect timing in conjunction with take-up
SONYTCFX5
Defective regulator q602This unit had intermittent bias osc. operation caused by theline mute (pin 21 ic501) being intermittently activated. we found thiserratic operation of the upc to be caused by a noisy voltage regulator- q602. a quick check of the b+ line revealed the pr
SONYSTR55
Defective ic101Tuner section drifts off station intermittently.
SONYSPP11H
Open q4Noise from hand unit in talk mode even with base-unit powered.
SONYSPP11
Defective ic2 ne567Base unit would not respond to any function from hand unit.in use light did not light, would not dial out. found ic2 pin 8 wouldnot go low.
SONYRT66
Defective reel motorThis unit had poor ff/rew torque and would stall when using90 min tapes.
SONYRS30
No shut off after the caller hung upThis unit would take one minute and sometimes more to shut offafter the caller hung up. there would be just a dial tone recorded on thetape. about every 15 seconds the unit would try to hang up. there wouldbe a click recorded on the tape but then the
SONYPSX55
Broken contact on switch camThe tonearm on this unit would not move in to the edge of therecord all the way or set down. we noticed a slight amount of friction inthe tonearm travel. disassembly revealed a broken contact on the switchcam (the electrical feeler that contacts the ca
SONYPS333
Defective pitch controlNeither 33 or 45 rpm would lock in. speed was excessive.voltage were correct.
SONYPCMF1
Defective d102Left channel was noisy - rec level control had minimal effecton noise - input signal was weak and distorted - line amp had some dcoffset at input to lpf - found constant current diode d102 breaking down.when testing this diode on a curve tracer using a 1
SONYICF9540W
Defective q1This unit had poor sensitivity and distorted output in thefm mode. we found the rf amp to be defective.
SONYCFM200
Missing part numberThe p/n for the mechanism chassis is missing from the servicemanual. however, the chassis from the cfs-400 appears to be very similar,this chassis is p/n a-3102-043-a. are these two chassis the same?the part for the cfm-200 was researched by kc with ne
SONYCDP101
Unit out of adjustmentUnit would skip on 2nd track and 5th track.