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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYXR44
Rubber key, switch ref no missingPart id number missing for item 56 on page 25 of s/m. thepart number is listed, but the id number in the exploded view is missing. -hq comments: i will issue a s/b.
SONYCDXR7
Incorrect part number for ic351Schematic correct, page 47 (ic351) incorrect, page 50 (ic351)correct. incorrect part correct part 8-759-200-47 8-759-203-91 tc40h365p tc40h365f -hq comments: a s/b is being issued.
SONYKV8100
P/n missing for channel swithcesCustomer wants to replace channel switches. schematic showsref. #does not list parts. -hq comments: the p/n for s2201-s2214 switches is 1-553-329-00 (see ctvs/b 146).
SONYKV1920
Excessive high voltageExcessive high voltage.
SONYSTRAV360
Wrong p/n for pll chipWrong p/n in manual for pll chip (cx7925/cx7925b).
SONYSLHF900
P/n for upper rear panelWe ordered ref. #76 and received the uv ant. switch, we alsoassumed the block cosmetic plastic panel would come with it (it didnwe located a part # from the damaged plate which is 3-691-780-00 whichisn -hq comments: the part number you seek is 3-691-782
SONYSTP7J
Reset problemsWhen powered on, sometimes display is messed up. resettingic603, pin 7 would restore operation.
SONYITA500
Ring levelCustomer complains that ring level is too low. this is thesecond complaint on this unit.
SONYITA600
Lock-up of phone line caused by ita-600Unit passed all telephone analyzer tests. however, whenconnected to the phone line, intermittent lock-up occurred, i.e. phonegave busy signal and other phones on the same line could not be used. ahigh pitch whistle was heard and no dial tone was presen
SONYEVC8U
Distorted videoVideo looks very cloudy - no high frequency.
SONYKV25XBR
DeadRgb and sleep light on, power up and would shut down. usinglowered line voltage set would run. looked at h. out and found ringingwaveform. found one of damper diodes with very high leakage.
SONYKX2501
H squeal and misconvergence, replaced hvr and l504Unit had h squeal. also, found when unit was cold, it hadmisconvergence on edges of crt. after the unit warmed up, convergence wasok.
SONYKV2649RX
Snowy picture, no channel light, replaced hptHigh band good, no low band or cable. no channel readout.found had no -30 volts, hpt open.
SONYCCDM8U
No color during recordingThe recording contained no color. found problem caused by nosubcarrier clock input at pin 17 of the ed-11 board. traced problem to apoor solder connection at ic771 on the vc-4 board. resoldering the pinsrestored normal operation. when camera section
SONYSLHF550
Audio line outputs low in normal e-e modeThe audio line outputs were down 15db in the normal e-e mode.we found the problem to be caused by a defective ic501 on the sa-10 board.
SONYSLHFR30
Intermittent loss of vertical syncCritical or intermittent vert sync.
SONYSLHF500
Picture loses vertical lock when warmIntermittent pix lock up after two to six hours on playback.
SONYCDP520S
Unit reads toc but will not go into playLoad disk and activate, scan lite comes on, reads toc, tableruns full speed, then nothing else happens.
SONYBMC660
Auto focusAuto focus runs in one direction - close up.
SONYCDP70
Optical pick upThe original pick-up kss120c (p/n 8-848-016-01) now changeto kss121a (p/n x-4910-424-1) does not work in the cdp-70. when replacedwith the new pick-up, new laser diode does not light up. -hq comments: please refer to supplement no. 1, 1985 cdp-70. yo