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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYD5
Disc spins - no audioOriginal problem was disc spins, then goes back to standby,no audio. verified problem, found that rf was coming up ok but disc speedwas wrong. in service mode we had gfs high all the time, however the vcowas not oscillating. measured 0.6vdc at pin 9/i
SONYCFM23
No part numberOn page 17 block d-3, part # of rivet 3x10 is missing. -hq comments: the part number is 7-625-724-30.
SONYSLHF300
Tape creasingTape damage at beginning of tape after auto rewind with l-750/l-830 tapes. tape remains slack after rewind, causing damage when playbutton pressed.
SONYXR740
Missing p/nNo part number or ref. # in service manual or irp. -hq comments: the two photo-couplers are mounted on the sw pwb asslisted in the s/m (ref. #913 p/n 3-596-542-01). will check with tokyofor separate supplies of the devices.
SONYSLHF600
Distorted pictureSymptoms viewed on the monitor look like an agc problem. syncinstability and a tendency toward a negative picture.
SONYCDXR7
Tuner availabilityMany reports of theft of the tuner section. can we getseparately? -hq comments: the tuner and players are produced in a pair, and no tuneralone is available.
SONYKX27HF1
Japan unit (100 v) can use in us?,need step down transformerCustomer bought set in japan. brought back to us and itplayed 7 hrs and went dead. svc says it is 50hz 100v, if so, can it bemodified to work in us? -hq comments: sony policy in such a matters is not to modify unitsdesigned for different standards. i
SONYBMC550K
Betamovie turns on in rec modeWith a tape in unit at turn on, unit would go into record modeand would not come out.
SONYBMC550
Hook up of the bmc-550 and the bmcj-888u converterIn fig. 1-7 on page 133 of the s/m the 4 pin connector fromthe converter is shown connected to the 5 pin connector on the cs-5 board,what are we to do? -hq comments: the betamovie jig cannot control the bmc-550operations. although inconvenient, you mus
SONYSL2400
No reel driveServicer replaced q218 and r233 (ss-13 board) several times(kept blowing), as well as q217 and q220, and reel motor board. replacedss-13 board with new one from npc, after 4 days r233 blew.
SONYKV2602
Blows fuse at turn on, replaced thp601 and fuseAt turn on f601 fuse blows out.
SONYKPR4150
Rainbow affectAt night, only you get like a half moon reflection on thescreen. if the person has a red tie and dark suit you notice this. -hq comments: it appears to be an adjustment problem. to investigatethat possibility, display cross-hatch pattern (generated in
SONYCCDV8AFU
Auto focus motor rotates past focus point and keeps on goingTurn unit on and auto focus motor turns focus ring too farand keeps on going. i have seen two of these. q020 was leaking c-b.
SONYCDP620ES
Wrong part number - ic301Ic301 is listed as 8-759-703-53. this is incorrect. the icis 74ls353n.
SONYM101
Motor mounts not compatibleThe replacement motor 8-835-008-11 is electrically correctbut has different mounting holes which will not permit use in the m-101. -hq comments: the original motor has been subbed to the one by p/n8-835-008-11 as in the tape recorder s/b #135. the s/b
SONYKV1957R
Set will not turn on with remote or manually, replace ic1wSet could not be turned on by remote or manual button.closing power relay would allow set to work ok. i saw no signal at outputof remote head amp and pressing power button would not operate set either.voltage checks revealed 32v line to be about 2v low
SONYKV20XBR
Flashing change in video level at turn on, ic101When set first turned on, there would be a rapid flicker andchange in video level for about 5 or 6 sec, then pix was ok. this problemwas noted at base of q403. at turn on, this voltage was very low andpulsating. further checks revealed the problem to
SONYCCDV8AFU
Intermittent drum/capstan rotation and no camera video1) drum and capstan rotations were intermittent, then drumrotated at maximum speed. 2) no e-e or recorded camera video at lineor rf outputs.
SONYSLHFR70
Left channel audio distortionLeft channel distortion on beta hi-fi playback only causedby am radio station 1540 khz. -hq comments: we do not have an hfp-200 here to try to simulate thiscondition. in the fpr concerning the sl-hf300, the customer lived closeto an am broadcast antenn
SONYKV25XBR
Vertical jitterThis unit had a vertical jitter on a satellite antenna. out-put from dish was low (about 3/4vpp). customer has two 25xbr tvs. theother one does not jitter. the output at ic1501 pin 20 was about 5vpp.