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Sony Repair Tips




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Search: sony
Results: 20100
Make Model Symptom Problem Solution By
SONY M100B
Tape jams The unit jammed the tape intermittently. when it happened,the take up reel was not turning although the capstan and the pinchroller were turning fine.
SONY ICF7750
Open foil trace Sound was very low and distorted or there was no sound atall. we found an open foil associated with r41. the foil looked finebut was open. foil repair resolved the problem. although this appearsto be a straight forward repair, it stumped the technici
SONY CRF320
Bad contact on ss-6 switch The unit came in with very poor sensitivity in am, sw and lw.checked and found there was almost no local oscillator signal at thecenter tap of ift201 in the second mixer circuit.
SONY CDP501ES
Missing ground path At the end of each selection of music unit would go intopause, no matter what position switch s917 was in auto/pause.
SONY XR75B
Jammed tape Tape jams or unit will not take up tape. problem is withpart #318 on p51 s/m. roller bearing on right side of tray is bent andloading mechanism cannot move smoothly.
SONY WMF10
No fm Fm was not working. only white noise was heard. since therewas fm white noise, i suspected rf section was bad.
SONY WMF10
Erratic speed The problem has been traced to poor solder connections onr904 and th901. often these two components have been installed offcenter. resolding resolves the problem in about 50 percent of the cases.the balance of the units require replacement of r904/th90
SONY WMD6C
No speed control The motor turned at maximum speed regardless of the functionor speed control. i replaced ic601 and fg901 but they did not help.
SONY WMD6
Pause does not work All functions worked correctly except pause. we found piece#387 not engaging #396. it appears that this was shipped from the factoryin this condition. there is no way for this to dislodge easily. -hq comments: i checked using the tape transport which
SONY TCM5000
Static in audio This unit produced an intermittent pop/static in the audio.we found the capstan bearing to blame. i have noticed that this unit isespecially prone to static problems caused by poor grounds.
SONY TCV7
Malfunctioning ams mode This unit would engage when the ams function was activated butwould not stop at the next selection. we found ic707 to be defective.pin 10 would not change states.
SONY TCK777
Poor frequency response Poor high frequency response on recording.
SONY TCFX505R
Malfunctioning ams mode No music scan or fwd ams operation. found that head chassiswas not staying up in ams position, thus the rp head was not reading anyaudio off the tape.
SONY TAF555ES
Transistor substitutions Power amplifier uses many 2sc1815-y transistors in the firststages. parts list subs them with 2sc1364. i believe this is incorrect,since for instance q309 and q310 would need a vceo greater than 60v. myspec list shows a typical vceo for a 2sc1364 of 5
SONY STP7J
Malfunctioning memory chip This unit worked fine except it was not possible to enter astation into memory. all inputs to the memory appeared to be correct.replacing ic601 (cx761) resolved the problem.
SONY ICF2001
Malfunctioning agc circuit In fm mode, if there is a large bass sound, it is verydistorted. but if the rf carrier level is low, the bass sound is notdistorted.
SONY CFSF11
Jammed deck Head gear p/n 3-313-754-01 broke jamming deck. afterreplacing gear, and replacing ball's back under head table, in rwd orrev mode head table does not come up enough to lock in position. with nodisassembly instructions unit cannot be serviced successful
SONY CDP200
Distortion at output Went through alignment procedure, but found gross distortionin audio output. noticed that waveform at pin 1 ic506 and ic507 was blankfor a portion of the charging time. could not find any voltages or wave-forms around ic505 wrong.
SONY CDP200
Jammed gears on chucking motor Thrust play on chucking motor was excessive causing gears tojam. the limit switch (s805) did not close until cam chucking plate 60was at the mechanical end of its travel. this caused the motor tocontinue to run for a short time after mechanical movemen
SONY CDP101
Pll out of specification Disc motor turned backward at maximum speed as soon asturning on the power switch. there was no 1/4 rfck at pin 23 of ic210(cx193).