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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYSTR313
Hifi bulletin #116Ic601 si-1125hd original was replaced with si-1225hd and unithad distorted right ch. another si-1225hd was installed, same problem.
SONYSL30
Low audio playback levelBy shimming head out 0.012 inch the audio level came up toaround normal levels. i would like to know why the head angle is sotouchy on these two head samples.
SONYTCYX50
No part # for capstan motorNo part number for capstan motor in service manual. -hq comments: the part number is 8-835-049-01. the part is availablefrom npc.
SONYTCK65
Missing part number for chassis ass'y mechanismNeed part number for chassis ass'y mechanism. -hq comments: the number is x-3564-020-0. it is available from npc.
SONYFD40A
Keystone picture, replaced q601Keystone raster. found no 17 volts being generated.
SONYKV1961
Intermittent audio, replaced neon lampOn position number 6, audio would come and go. found neonlamp causing triggering of the muting circuit.
SONYMDRFM5
Part number for s401We need part # for s401 auto off switch. -hq comments: the part # is 1-553-589-00. the s/m for the us version ismissing some parts. this has been supplemented with the radio s/b #172.parts are also listed in the s/m for us/e/aep version.
SONYSL2700
DeadPush power switch on, power switch light does not light, drumis turning, tv/vcr switch does not work, and will not take a cassette.
SONYBMC110
Poor tape path, intermittent distorted pictureWhen playing back on a good vtr, the playback picture haslines and horizontal pulling at the top and bottom of the picture (this isintermittent). also, picture bounces vertically intermittent. thisproblem looks like the betamovie has bad tape path.
SONYSTRVX550
Inoperative remoteReceiver will turn on with remote but no other functionswork. all previous modifications including reset, capacitor, surgesuppressors and ground repairs were done. serial data is entering ic403at pin 21, but no output.
SONYCFSD7
Intermittent functionsUnit will only go into rewind or recording mode inter-mittently. stop button will have no effect. disconnecting power cordwill reset unit to stop mode. pressing any function button, the unit willgo only into rewind.
SONYXR20
Pop noise every 5 secondsA popping noise every 5 to 7 seconds is heard through thespeakers.
SONYKV1221R
Shutdown, replaced q601Using an isolation transformer, unit will work properly.when using the wall outlet, unit will not turn on. the only diff. foundwas the isolation transformer output was 8vac less than the wall outlet.
SONYKV25XBR
Wrong part numberThe service manual shows ic1502 as part number 6-066-717-10 inerror.
SONYKV1355R
Wiring error in manual, a-12 connector reversedIn the manual, the wires to plug a-12 on the a board arereversed. we discovered this while troubleshooting a key board problem.
SONYKV1920
Start circuit burns upThe start circuit would fail to turn off despite the factthat the set was running and making 18v for the horiz. osc. circuits.we found the trouble to be caused by a defective horiz. osc. ic. it tookabout 11v to fire, this permitted the start transistor
SONYSEH310
Part numbers for front panelFront panels came in black or silver, but manual only showsone number, with no indication of color. we need the numbers for thesilver and for the black front panels. -hq comments: the number shown in the manual is for the silver panel.parts for the bla
SONYWMF8
Missing part # for bracketThe service manual for this unit shows two ref. #31 in theexploded view on page 24. the parts list only shows the part # for thelabel and does not show the part # for the bracket. -hq comments: the part number is 3-319-043-01. please refer to t/na007.
SONYMDR40II
Part number for head band ass'yNeed correct part number for brown head band assembly.manual says x-2371-808-1 but tech. keeps getting black one. it seemsthat several of the part numbers on page 3 of the mdr-40ii manual arewrong. -hq comments: found the part number of the dark brown
SONYSTRAV560
No am or fmNo am or fm reception. when heating xt201, normal function returns.