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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYWM10
Supply reel ass'yEven with the thinner washers, it has been found that thesupply reel gear, wheel block assy, and motor chassis assy will not gotogether. caused dragging and washer and stopper will not go on shaft. -hq comments: washers are used to adjust clearances on
SONYCDP302
Compact disc playerSkips intermittently, track 6 or higher, not always in the same place. a mylar sheet is already in place inside the bottom panel to reduce drag on the flexible connector from bu-1.
SONYSL10
Negative pictureNegative picture and no sync on e-e and pb.
SONYSLHFR70
Intermittent no tuner audioNo tuner audio from ti-5 board. pin 11 (tuner audio mute) ofic301 on sa-10 board was high. it could be intermittent.
SONYSLHFR70
Poor betascan after 30 min to 2 hrsUnit had very poor betascan (all modes) after warming up.
SONYSTRVX550
Volume stuck in levelVolume stuck in one level, however, display changed.
SONYFD20A
Wrong color cabinet partsHerman electronics, part distr. in miami ordered p/n3-314-033-21 and 3-314-023-21 for a silver unit but keeps getting thoseitems in blue. -hq comments: part numbers in service manual are incorrect. pleaseorder by the part numbers below.3-314-033-21 cab
SONYBMC220
Poor picture - with/no colorAfter repairing original focus problem, unit failed duringfinal test. unit displayed a very poor picture, no color and out offocus.
SONYTAAX6
Incorrect part #End user has had unit serviced by a&e tv (non-asc, canogapark). pilot lamps need replacing. s/m has only one p/n 1-518-453-00which subs to 1-518-453-31 on kc system. color is red. please advisepart numbers for following color pilot lamps: pl#06-10 (
SONYCCDV8
Video distortedOne video head was not soldered.
SONYTCFX500R
Pushing rec causes rec muteUnit would go into rec mute whenever rec was actuated. normalrecording is not possible.
SONYSLHFR90
Intermittent snow when video signal level changes quicklyIf video level changes rapidly, as when station cuts to acommercial or back, picture goes to snow for 1/2 sec. or so, but sound isnot disturbed. control pulse is still on tape. slow change in videolevel does not produce this symptom. servicer claims t
SONYKV25XBR
Schematic error - soundIn troubleshooting a kv-25xbr, i found a problem with theschematic. on the x board, ic1107, pin 8 goes to r1208 and then to12 volts. pin 8 goes to the wipers of the switch inside the chip. theway the schematic is drawn, there is no way to switch from
SONYD5
DeadD-5 was dead.
SONYTCFX410R
Intermittently no powerIntermittently no power or power but no functions or noindicator lights.
SONYWM11
Audio has a lot of wow and flutterPlayer plays slow with slight flutter due to the supply reelspindle being tight. several attempts to loosen the reel have failed. inall units the torque is sufficient and mirror cass shows a straight tapepath. pinch roller is clean. when the tape sup
SONYKV2680R
Vert lines in pix, descrambled cable onlyOn descrambled cable signal only, thin white vertical linesappear at one or the other side of screen. this does not occur withoff-the-air broadcasts, or unscrambled cable programs. -hq comments: the symptom is a byproduct of scrambling and descrambling
SONYKV2654R
Distortion (bending) drifts through pictureA distortion bar would float upward through picture at abouta 60hz rate. within the bar, the picture was bent at the edges.
SONYKV1970R
Low audio, bypassed r214When volume indicator is at midrange on screen, audio is toolow to be heard. this servicer (bee tv) had five customers complainingabout audio level on kv-1970r and kv-1971r.
SONYCRF330K
Part number missing - counter board aNeed p/n for counter board a if available. -hq comments: p/n for the counter board a is a-3625-004-a. board assyis in stock at npc.