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Sony Repair Tips




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Search: sony
Results: 20077
Make Model Symptom Problem Solution By
SONY CDPC27
No open/no function controls (replace c431 p/n 1-162-294-31) Unit would not open and front panel controls wereinoperative measured key inputs of ic401 and found key 6 to be at 0v.checked c431, found c431 to be partially shorted.
SONY STRD990
Unit goes into protect - ic202 faulty 8-759-071-90 Unit would go into protect. upon diagnosis found all poweramps and ic's to be functioning properly. desoldered the protect input ofic202 pin#47 and the unit still went into protect.
SONY CFD250
No audio radio and cd replace ic308, p/n 8-759-060-73 When playing tape, audio from tape is still on even when function buttons radio and cd are pressed. thus no radio or cd audio comes out.
SONY FD285
Picture pulling horizontally, resoldered c509 Severe horizontal off-freq cannot be corrected by adj.(fh) rv502. visual inspection shows c509 on the pinside of ic501 notsoldered at the factory. slightly pushing c509 will correct the problem.
SONY KPR53EX35
Dark parent pix, child pix ok - replaced blue crt Servicer found that set had very dark picture, but pip wasnormal. at first he looked at ic201 pin 40 but found no sub-brt controlrv202 in set. he changed ic201 no help. then he checked pin 41 and found0.1vdc instead of 4.1v. running down abl line found
SONY CCDFX600
Service bulletin #302
SONY KV29XBR85
Schematic error, page 100 - c9 should be 0.018mf On page 100, coordinates b9, c9 is called out as r018. itshould read 0.018mf. -hq comments: thanks for the information.
SONY EVC3
No video in sp pause and scan ic002/vi-52 bd In lp mode pb video is ok in pb, pause and rev, and fwd scan.in sp mode pb video is ok during playback. but there is no video inpause, review or forward scan.
SONY ICF7600D
Part value in unit doesn't match schematic and shorted c65 Schematic says r67 is 1.5k but, i found a factory installed100Ω resistor in its place. also c65 was shorted and this was causingno am reception because the drain of q11 was being pulled low through t9. possibly the bad cap was caused by the wrong va
SONY SLHF860D
Ejects tapes after threading: replace ic401 st-17 bd Sometimes unit will accept and play pre-recorded tapes. butmost times, it will eject tapes upon threading. also, not as oftenafter recording will rewind and playback at slow motion. replacing s901and (201) rotary sw (encoder) did not correct the probl
SONY CFD757
No power - resolder ic309. Unit will not power on. found cold solders on ic309/pins 8 and12.
SONY CFD450
No audio and no cd power - replace d306 and r312 No audio and no cd power was caused by a small piece of wirebridged between the base and collector of q308. this also caused r312 toopen and d306 to short.
SONY CFS904
No power with ac adaptor - replace f901, p/n 1-532-675-00 The unit has no power with the ac power adaptor, but does havepower with the batteries, this is due to f901 being open.
SONY CFD440
No battery power - remove solder bridge on battery board. A solder bridge between the red and black wires on thebattery board was found. this caused no battery power and also melted thebattery spring, at the opposite end of the battery compartment, into therear cabinet. the bridge looks to occur during manuf
SONY D802K
Defective back light - replace c901, p/n 1-135-179-21 Back light would not turn on. measured voltage at base ofq901, no voltage was present at this point, upon further diagnosis foundc901 shorted to ground preventing q901 from turning on.
SONY CFD757
"a" or "b" deck tape door open on stop instead of eject #252 lever line breaks off under #208 lever, stop. #209slider(s) eject is therefore selected when stop is pressed.
SONY CFS1030
No audio - replace q304, p/n 8-729-177-32 No audio output.
SONY CFD440
Tape door opens on stop instead of eject #151 lever line breaks off under #103 lever, stop. #106slider (s) eject is therefore selected when stop is pressed.
SONY CFD450
No audio output - replace ic303, p/n 8-759-822-51 Unit has no audio on all functions. ic chip is shorted (poweramp).
SONY CFD440
Static between tracks - replace ic703, p/n 8-752-337-26 Static sounds can be heard between tracks using the yeds-1disc. about 4 units out of 35 had this problem or 11%.