Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
---|---|---|---|---|---|
Sony | STRD915 | NO FM RECEPTION - REPLACE FRONT END | FM station does not come in. | ||
Sony | STRD915 | DEAD - RESOLDERED RY901 | Found one side of coil on the power relay unsoldered. | ||
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 | STRD915 | MEMORY PRESET 1, DIRECT, & TAPE BUTTONS WON'T FUNCTION | The memory preset, direct, and tape function buttons areinoperable. | ||
Sony | CFSD960 | NO TAPE FUNCTIONS | No tape function, upon opening saw that second lever waspopped out of place, put back in place and adjusted unit. | ||
Sony | CFD970 | NO POWER WITH 9V ADAPTOR - REPAIR TRACE ON J901 | Unit had no power DC. Upon checking DC jack, it was foundthat the middle trace that carries 9v to the other parts of the unit wasbroken at J901. | ||
Sony | CFD970 | NO POWER AC/BATT - REPLACE PS901, P/N 1-532-686-21 | Unit had no power by 9v adaptor and by the batteries. Powercoming into J901 was ok. Checked PS901 which was open. This is a verycommon problem with this model. | ||
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 | STRD911 | SHORTED OUTPUTS | Found shorted output. Transistor's base lead of outputtransistor overdisipated and had fallen off. Have seen three units likethis. | ||
Sony | STRD911 | WEAK AND CRACKLING REAR SURROUND - IC414 DEFECTIVE | Very weak and distorted rear surround, center was fine. | ||
Sony | STRD911 | LOST FM RECEPTION, CUTS OUT WITH VOLUME TURN UP - IC973 DEF. | +5V reg, IC973 defective. Lost FM reception, no tuner.Lost +5 line regulator. Unit cuts out after volume turned up to 4 or 5. |