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Sony Repair Tips




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Search: sony
Results: 20077
Make Model Symptom Problem Solution By
SONY STRD611
No power - power board broken The unit has no power. checking with volt meter, reveals that the traces are broken on the primary side of the transformer (ref# t902).
SONY STRD590
Wrong part number j702 headphone jack Order part nubmer in manual and received a 27 pin socketconnector. need part number for headphone jack.
SONY STRD511
Unit in protect - ic651 defective This unit would go into protect as soon as it tried to comeon. all outputs checked ok.
SONY STRD511
No power - t901 opened The unit has no power. further trouble shooting found thatt901 is open.
SONY STRD511
No power - power bd cracked The unit has no power. checking with volt meter reveals thatthe traces are broken on the primary side of the transformer (ref #t902).
SONY STRD390
Dead - replaced output transistors The unit was dead because r775, r774 and two outputtransistors q762 and q763 had overdisipated.
SONY STRD390
Wrong part number for j702 headphone jack. Ordered above part number and received a 27 pin socketconnector. need correct part number for headphone jack.
SONY STRD311
Protect on - reconnect cnp404, cnp103 The unit is in protect. a visual inspection reveals that join-1 board cnp404 is not connected with cnp103 on volume board.
SONY STRD311
Left ch output ckt appears to fail more often than right My experience indicates that the left channel outputs onthese units fail far more often than the right. the only significantdifference i see is in the overload circuit, specifically q714, which iswired differently for the left channel than the right.
SONY STRD311
Wrong q712 in unit - replaced with correct part Customer complained of unit never working correctly. rightchannel looked ok, but, the npn, q712, in the left channel evidenced casedamage. although most of the numbers were obscured by the damage, wecould see that it was a 2sc-----, not a 2sd2439, as i
SONY STRD311
Q706/756 (2sb2012) legs too short The legs have to be cut on the old transistors and soldered tothe new transistors to have them reach the board. -hq comments: kcp fax reply 04/14/94 according to kcp in checkingstock, the transistors lead length is 14mm from bottom of transistor(body) t
SONY STRD1011S
Dead mute light flashes - front panel switch stuck closed Found all start up power supplies good. checked front panelswitchs, one was stuck in.
SONY STRD1011
Unit dead - ic150 pin 64 cold soldered Unit dead. power supply ok reset at ic150 would not go high.
SONY STRD1011
Hum noise - connector cn451 grnd dislodged Hum noise at speakers without input.
SONY STRD1011
No center channel - ry602 defective Main speaker works ok, no center speaker. i found relay ry602open.
SONY STRAV900
Function bleed-over - refer to s/b hfp #280 Audio bleeds over from one function to another, level is low,but noticable. do we have any modification for this model. if so, pleasefax asap. note: problem similar to bulletin 225 on strav920/1020. -hq comments: use the modification outlined in s/b h
SONY STRAV310
Surging audio - tightened ground screw Complaint of surging audio was corrected by tightening theground screw in the upper right corner of the main circuit, board as shownon page 12 of the service manual. this loose ground caused r802 toover-dissipate and fail. -hq comments: a star washer sh
SONY STRAV23
No display - secondary of t901 open Unit had no fl display, but mute, dbfb, and surround led'swould work. checked fl301 for proper voltages and found ov. found t901to be open, replaced t901.
SONY MHCC90
Cable too short - use p/n 175165911 The same cable that is supplied for the mhcc50 is the same p/nused for the mhcc70 and 90. this cable is too short for use on the 70 and90. -hq comments: as per kcp p/n 1-751-659-11 (22 core flat) is identical top/n 1-751-597-11 (22 core flat) with the e
SONY MDS101
Auto track marking feature: description The operation of the automatic track marking feature (whenusing the analog input) is not described in the service manual. -hq comments: the mds-101 will mark a new track number when the analoginput is seeing a -45db signal for a minimum of 2 seconds.