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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYKV25XBR
Damaged boardThree out of eight units we received at the consumer ctrin tampa have cracked x boards along the edge near q1111. no damageto the cartons. -hq comments: the cause seems to be flexible cabinet/chassis ofkv-25xbr.
SONYKV2680R
Set comes on but no other functions, snowy screen, open d031Set could be turned on or off. raster with snow was presentand no other functions would respond other than on/off. inspectionrevealed no clock pulses at pin 16, ic031. voltage check showed no dcvoltage at pin 1 or 41 of this ic. i found d039 to be op
SONYKV1975R
No manual or remote functions, replace ic105If the set was plugged into ac line, it would turn on but thepicture would be snowy. other times it would not have any manual or remotefunctions other than you could turn it off manualy or with the remote.it would only come on if the the ac cord was disc
SONYSTRVX6
Noisy audioRight channel noisy when volume control turned. also verynoisy when subsonic switch engaged. found yellow glue leaking across from+15 volt line at stereo/mono switch to subsonic switch connecting wires.
SONYKV2680R
No channel change, ic-1302 on "a" boardUnit would not change channels. if channel up/down waspressed, screen would blank for a moment, and return to the same channel.
SONYKV2084R
Weak sync, replace q203Unit had bend in picture and color hue was off. traced theproblem to q203 (a board), sync looked good but at emitter horizontalsync was clipped.
SONYCDP101
Intermittent operationWhen first looked at the spindle, motor was on in reverse atfull speed. found ic503/x502 not operating and replaced them. motorstill ran in reverse but the clock was operating. pin 13/14 ic503 wave-form was low. found q510 b-e open.
SONYSPP22
Buzz in the handsetBuzz picked up from telephone connecting cables.
SONYKV20XBR
Unit will not come out of rgb modeUnit stayed in rgb mode. remote inoperative, front panelcontrols inoperative except for power on/off. screen black.
SONYXR44
Need part number for power harnessWhat is p/n for power harness? -hq comments: the s/m has the part and reference numbers on page 25.the part number is 1-556-901-21 and reference number is 901. we willissue a s/b.
SONYKV1391R
Video flicker, replaced ppu1There was a flicker in the video, this started out to beonly on the high band channels. later on it was even on the low bandchannels. found that the synthesizer unit was not locking and this lookedlike video flicker.
SONYXR77
Missing part number - c179Need part number for c179 (3300uf @10v) listed in capacitorchart. -hq comments: the part number is 1-123-655-00.
SONYCDP302
No play functionWill not play.
SONYKV2156R
Burnt (m) boardThis was the third unit i encountered with burnt m board.all of them on the same spot. d115 shorted and r181 overheated and burntthe board.
SONYCCDV8
No audioUnit came in with no audio on playback. it recorded fine but it still would not playback audio.
SONYCCDV8
Tape jamTape jammed. the unit would power up but would not perform any other function. i resoldered x601 and the unit started to perform normally for a few minutes, but it stopped working again.
SONYSLHF900
Rewind problemUnit rewinds for approx. 3 to 6 sec then stops (same problemon reverse betascan). problem happened as soon as unit was unpacked.
SONYSPP22
Hum in head setThere is always a hum present in this and two other similarunits. this hum can be eliminated by moving the lead which connects tothe phone line. placement of this wire is very critical. no solution. -hq comments: connect 0.01/25v cap between the coll
SONYSTRAV560
No fm or amNo fm.
SONYSL2710
Double picture in pause/poor betascanIn pause mode picture exhibits a bend in the middle and twoimages, slightly offset. betascan was extremely noisy with 2 or 3 noisebars, 15-20 lines wide. symptoms were intermittent.