Dicas Reparação
Modelo - Chassis TAAV521
Pesquisa: TAAV521 Enviar Dica Resolvida
Resultados 14
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | TAAV521 | UNIT IN PROTECT - REPLACED C753 | Unit in protect. Found a +10 volt offset on speaker line.Checking with scope could not see any clipping or distortion. Checked alltransistors, diodes, resistors and caps. Found C753 had 53 ohms ofresistance. | ||
| Sony | TAAV521 | AUDIO CUTS OFF - SEE S/B HFP0341 | Service bulletin on the TAAV621 listed this problem HFP0341. The 621 and 521 use the same service lit. Shouldn't this bulletin alsocover the 521? | ||
| Sony | TAAV521 | INT STATIC IN MAIN LEFT SPKR, INT PROTECT - REPL INT Q701 | The unit had intermitten static in the left speaker.Occasionally the protect would engage. The problem was caused by anintermittent Q701 diff amp. The device was not effected by freeze sprayor heating. | ||
| Sony | TAAV521 | INCORRECT VALUE X101 MOUNTED ON DISP BD | Unit sent in with broken display board. Ordered new displayboard and replaced it. Still could not turn power on (no function).Reordered another board, installed 2nd board in unit still no power. | ||
| Sony | TAAV521 | DEAD NO POWER - REPLACED IC501 AND IC101 | Unit dead IC101 system control defective. No DC voltage tocontrol power relay line. Replace IC101 unit powers up but when I changemode to phono, unit has popping noise. IC501 defective. | ||
| Sony | TAAV521 | CAPACATORS VENTED ELECTROLYTE OVER PCB - REPLACED CAPACITORS | Caps blew and vented all their electrolyte causing minimaldamage to the PCB. Also, noted that the original capacitors were rated at63V instead of 71V. The replacement part number is 112573011 which is71V. | ||
| Sony | TAAV521 | IC304 PIN GUIDE IS INCORRECT | The schematic and the board pictorial show the notch on thisIC corresponding to pin 1, this is incorrect for this particular IC.There are also two dot marks on the top surface, one on each corner 90degrees off from the notch. Pin 1 is indicated by the s | ||
| Sony | TAAV521 | NO AUDIO ON CENTER AND REAR - REPLACED Q716 AND Q717 | No audio on center and rear, found Q716 and Q717 on main boarddefective. | ||
| Sony | TAAV521 | NO AUDIO - FOUND Q720 OPEN | No audio output (relay not Activating). | ||
| Sony | TAAV521 | CENTER AND REAR BOARDS NOT AVAILABLE - SEE S/M CORRECTION-1 | These boards are no longer supplied separately. | ||
| Sony | TAAV521 | SOUND "SWIRLS" WHEN IN DOLBY PRO-LOGIC WIDE MODE | An ASD in Sacramento has two units with the same problem. Thevolume out of the front speakers pump alternating from left to rightcontinually when Dolby Pro-Logic Wide mode is selected, but it plays finein other modes. Replacement of IC304 and IC308 did | ||
| Sony | TAAV521 | NO AUDIO FROM CENTER CHANNEL - IC851 FAULTY 8-759-502-33 | There was no sound from the center channel, the display willlight. By removing CNJ803 (7 pin flat cable), the unit will work. | ||
| Sony | TAAV521 | HISS NOISE ON REAR SURROUND CHANNELS WHEN IN DOLBY MODE | Two (2) units have a hiss on the rear channels. The hissoccurs on all Dolby functions only. The auto balance light also stays onduring all dolby functions. This is most noticeable on quiet passageswith high volume levels on front and rear. -HQ COMMEN | ||
| Sony | TAAV521 | OVERDISCIPATED RESISTOR/CAPACITOR | C-761 mylar capacitor changed shape and looks likeelectrolytic cap. R-779 overdiscipated also. Customer's complaint iswhen you use center channel, popping sound is heard. R-729 had sign ofoverdiscipation also. Output transistors and emitter resistors s |