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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYBMC550
Service manual correctionAdj. 2-3-9 should read rv807, rv808. adj. 2-3-10 should readrv809, rv810. mr1-mb1 temp adjustment cv-1 board. mr2-mb2 tempadjustment cv-1 board. -hq comments: we will issue a s/b.
SONYCDP102
Intermittent mistracking end of discSkips near end of disc. flex strip from fop touches bottomcase and hangs up.
SONYSL5400
Bad pictureSymptom on tv screen would look like loss of interlace scan-ning with bending and tearing at top of screen.
SONYSLHF900
Pinch solenoid wonPinch solenoid will not hold after actuation. found 2sd1164installed as per schematic and parts list. however, we found that only2sd773 would work in its place. i believe that 2sd1164 is wrong for thistransistor (q416), judging by q414 and q418. -hq
SONYXR65
Fm squealAudible screech when receiving a stereo signal. fm monothere was no problem.
SONYSLHF900
Hum in audio when connected to cable and stereoWhen connected to stereo system and cable, sl-hf900 wouldoutput hum from audio jacks. this would disappear if the rf cable wasdisconnected.
SONYWMF18
No auto reverseUnit will not auto-reverse.
SONYXR780
No tape outputAudio output of tape section ceased after one month.infrequent intermittent operation after that.
SONYWMF75
Both sides of tape are heardBoth sides of tape can be heard regardless of forward orreverse play mode.
SONYKV2681R
Dead, resolder t-501gDead. set does not turn on at all. no signal at base ofhoriz. out. q504. however, there is signal at q503 collector.
SONYKV1913
Shut downCustomer had unit into fsc four times for regulator failure.found hvr assy cracked. set has been operating for three months withoutfurther failure of regulator.
SONYCCDV8
No drum rotationNo drum rotation. signals reaching drum drive ic.
SONYCCDV8
Power on/off ok, all other functions inoperative1) power on, drum rotates for approx. 10 sec, then eject ledblinks. all buttons inoperable. 2) capstan motor would not rotate, unitwould only thread/unthread. this occurred after repair 1) was performed.
SONYCCDV8
Rewind button inoperative1) rewind and review inoperative using rew button (p/b ok).after cue (ff button) is released, unit automatically enters review mode.2) p/b picture noisy.
SONYCCDV8
Tape jammed intermittentlyMotor intermittently won't start unless rotated manually.
SONYCCDV8
Playback jitter and noiseCleaned, no help.
SONYCCDV8
Pins bent on 24 pin connectorPins 23 and 24 were bent. -hq comments: pins 23 and 24 are not used on the multipin connector.the recommended solution if pins 23 and 24 are bent is to cut them off atthe base.
SONYCCDV8
Intermittent no functionOsc change frequency.
SONYCCDV8
No ejectFrozen motor.
SONYXR66
Non manual autoreverseUnit will auto reverse at the end of the tape but not whenthe front panel buttons are pushed.