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Sony Repair Tips




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Search: sony
Results: 20105
Make Model Symptom Problem Solution By
SONY STRD790
Unit dead. would not power up - replaced q755 and q756 Unit would not power up. both q756 and 755 wereshorted.
SONY STRD790
Dead - resoldered surround outputs and repl fuse. Fuse blown, outputs ok. surround output ic had ring cracks.
SONY STRD611
Wrong main board and display board Front panel is strd611, but inside main board and displayboard belongs to strd511. unit has wrong pc boards installed.
SONY STRD611
No output/no sound - replaced ry701 Open ry701 (relay open coil). there is no sound at the outputto speaker.
SONY STRD611
Blown outputs - replaced outputs and fuse Found left outputs shorted and fuse opened.
SONY STRD611
Protection immediately at power on - ic601 defective Unit goes into protection immediately at power on.ic601 pin 1&2 should be at 0v, but i measured -21v.
SONY STRD515
Constant 6khz tone thru out unit - ic802 defective A 6khz tone was constantly heard in the speakers with itslevel variable by the volume control. the oscilloscope showed its presencealmost everywhere you looked in the unit, including the ground lines.
SONY STRD511
No output from main speakers - q714 shorted Q714 on main board shorted. ry701 relay is not engaged.no audio output.
SONY STRD511
Left channel out, protection on, ic301 defective Unit is going into protection when power on, if notprotection, left channel cuts off sound output transistor is ok. i foundi301 defective. prologic doesn't work.
SONY STRD511
Unit has no display - transformer t901, open Unit has 5v standby, relay kicked on and allowed 12v thrut901, but nothing on display. t901 open at primary coil.
SONY STRD390
Unit dead/no power - relay drive transistor defective Q960 on main board defective. no display, no relay kick on.unit dead, no power.
SONY STRD1090
Intermittent muting - resoldered class a board Intermittent muting (-20db).
SONY STRD1090
Surround board change The surround board has been changed. in supplement - 2it gives us the circuitry change of the surround board but no part number.if you order part a4347-979-a it comes with ic 417. not like the changein supplement - 2. i need the part number for the
SONY STRD1011
No remote volume operation - ic231 installed backward Ic231 driver put in backward by factory.
SONY STRD1011
Mute button doesn't work - replaced defective q255 Front speaker output is very low, muting button lights up butdoesn't work. i found q255 on a class board defective.
SONY STRAV920
No audio - re-connected volume/balance board No audio out, found that the volume board was not fully plugged in to volume balance board.
SONY STRAV910
Dead - replaced power transformer No standby found primary open on transformer.
SONY STRAV720
No function on video/no video output - replaced q252/ic251 No picture out/no video output. this is occuring on both video1 and video 2. i found q252 shorted, r255 opened and ic251 was defective.
SONY STRAV270
Unit has no power, no display - r703 opened Unit has no display, r703, 39Ω resistor, overdissipated. itbecame 19kΩ.
SONY STJX431
No fm tuning - resoldered tuner to board The unit would not tune in fm radio stations. it only hadstatic. i opened up unit and pulled out the pc board and found the tunermounted at about 35/40 degree angle and not flush with the board. thepins on the tuner had solder over the sides but the p