Dicas Reparação
Modelo - Chassis STRD990
Pesquisa: STRD990 Enviar Dica Resolvida
Resultados 18
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | STRD990 | CROSSOVER DISTORTION ON CENTER CHANNEL | Performed the mod as per S/B # HFP335, but the customer still complained of sound distortion at center channel. | ||
| Sony | STRD990 | ALL INPUTS BLEED THROUGH TUNER | When tuner is selected and there is an input into cd it bleedsthrough tuner. The same happens if you switch input from cd to tape,dat, video. -SOLUTION : Found capacitor that was not on schematic across pins 10and 14 of IC803 electronic volume control, | ||
| Sony | STRD990 | DISTORTED RIGHT & CENTER CHANNELS - REPLACED IC311 | Distorted right & center channels.Replaced Q654 per FPR N2180,However this was not cause of this problem. Found right channel distortedat input jacks and worse as signal went through the amp. Using scope probeas antenna found noise radiating from IC311, | ||
| Sony | STRD990 | BUZZ IN REAR AND CENTER CHANNELS | Buzz in rear and center channels. | ||
| Sony | STRD990 | SURROUND SOUND DOES NOT WORK - REPL Q641 AND 643 | Q641 and Q643 shorted, relay for surround speaker did not kickin. | ||
| Sony | STRD990 | NO CENTER CHANNEL - IC202 DEFECTIVE | Found IC202, pin 27 not going high enough to activate thecenter channel relay. | ||
| Sony | STRD990 | UNIT WORKS, BUT THE DISPLAY WILL NOT LIGHT UP - T902 OPEN | Unit works O.K. but no display. Found transformer T902 open,at pin 21 and 23. There was no AC voltage to the display. | ||
| Sony | STRD990 | UNIT WILL NOT TURN OFF - RESOLDERED JUMPER WIRE | The unit would turn on when power was applied. The mute lightwas always on. All front panel controls work, but there is no audio andunit will not turn off. | ||
| Sony | STRD990 | TUNER BLEED WHEN USING OTHER INPUTS - USE S/B 225R1 | Also s/n 8863992. Units have tuner noise when listening toother inputs at volume level 2 and up. Noise increases as volume isturned up. Please provide remedy. -HQ COMMENTS: Please try the STRAV920/1020 modification (S/B 225R1).It transfers to the STRD9 | ||
| Sony | STRD990 | UNIT GOES INTO PROTECT - IC202 FAULTY 8-759-071-90 | Unit would go into protect. Upon diagnosis found all poweramps and IC's to be functioning properly. Desoldered the protect input ofIC202 pin#47 and the unit still went into protect. | ||
| Sony | STRD990 | UNIT SHUTS DOWN - Q658 (8-729-321-21) & Q660 FAULTY | Unit shuts down. Locate and replace shortedQ654/Q655/Q658/659/660. | ||
| Sony | STRD990 | UNIT INOPERATIVE - D957 FAULTY 8-719-933-41 | Unit is inoperative. Cannot turn on and no relay click, no+5v regulator, Q951 off. I found shorted diode D957. | ||
| Sony | STRD990 | MISSING PARTS ON SURROUND TUNER BOARD - IC308, IC309, MORE | A number of units have been received which are missing partson the Surround Tuner Board and have jumpers installed in place of theparts. Some units have a different version PC board (Some have1-644-100-11 version board and some have 1-644-100-12 version | ||
| Sony | STRD990 | ORIENTATION ON D301 AND D302 SHOWN INCORRECTLY IN S/M | The orientation on D301 and D302 in the schematic diagram(page 24, location P/8) and the PCB layout (page 28, location E/8) isshown incorrectly (both shown reversed). | ||
| Sony | STRD990 | DLRC MAIN ON DISPLAY WHEN UNIT IS OFF - RESET IC202 | When unit was on, it would function fine. When turned off,display would read DLRC MAIN. |