Question about Pioneer VSX-D908S Receiver

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VSX-D908TX 5.1 Home Theatre Receiver (THX) Problem: No audio for 5-10 minutes after switch-on. The speaker relays click in ok so the problem is a muting related thing. If you know of this problem or someone that does i would appreciate a starting point. I am technical myself and have the circuit diagrams but don't wish to have the system off air for too long. Regards Alan Jones

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  • sintro Jul 13, 2008

    I am having the same problem, have you found the solution yet?

    It seems to be getting worst, no audio for 15+ minutes then when I switch input, I have to wait again.

  • Alan Jones Oct 23, 2008

    Well i believe i have found the problem, it is the DSP card and to purchase one from Pioneer would cost A$750.00. I could buy another amp for that but it would not be in the same league.

    The problem is wide spread and dsp cards are drying up so repair is the only option. I have corrected the problems i found but need to put the amp back in the system to prove it so a further update is required.

    Regards

    Al

  • Alan Jones Nov 02, 2008

    The problem is IC9374 (PDK042A), IC9372 (TC55V1664BFT-12) and IC9371 (TC55V8128BJ-12) on the DSP card (AWX7433). They require resoldering which is not easy as special surface mount soldering equipment is required, plasma flow soldering I believe was use on my board. I have access through contacts for this so for me it was easy. Not all three IC's may need soldering but certainly IC9374 and IC9372 were big contributors to the problem.

    Hope this helps.

    Regards

    Alan

  • Anonymous Apr 16, 2009

    Same problem of my VSX-D908TX. It has to be waited for over 10mins for warming up.

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It definitely is the DSP board. I pulled mine out and it had already been repaired once and it repair work looks exactly like the ones shown here http://excelcier.com/pioneer_vsx-27tx/ .

Currently I can only listen to the radio in DIRECT mode, if i change it to Stereo or other DSP modes it will be silent no matter how long i wait.
How did your repairs go? Can you please let me know how you repaired it?

Thanks.

Posted on Nov 02, 2008

  • 3 more comments 
  • sintro Nov 03, 2008

    Thanks for sharing the info. You are definitely right on that one.



    Actually not long after my previous post, I took out the DSP board then resoldered IC9374 (PDK042A) plus the two 0ohm resistors (R9374, R9373).



    I did not have the right surface mount soldering tools, the soldering iron tip was too big to apply any new solder. I cleaned up the soldering iron tip and managed to reheat/resolder all the IC legs in quick straight strokes.



    This seems to have fixed the problem, now the sound kicks in immediately when I turn it on, just like it should. It was definitely worth the effort but too bad I have already placed an order for a new amp.

  • oengfrias Feb 05, 2011

    Thanks for this posts! I have resoldered mine(IC9374) and it worked just fine..i now get sound from my elite when i turn it on.. Really helped a lot! oeng

  • app_3rp12973
    app_3rp12973 Feb 06, 2012

    Thank you!! I resolderd eveything and it works fine!

  • app_3rp12973
    app_3rp12973 Feb 06, 2012

    Thank you! I resoldered everything and it seems to work again! Nice

  • thomasn4
    thomasn4 May 14, 2012

    My brother-in-law has one Pioneer VSX-29TX,and it is NO sound. I did reflow solder at IC 9374(PDK042A) and removed 0Ohm resistors at R9372 and R9271 and then installed at R9374 and R9373. But the result is the same as no sound. Any advise is appreciated. Thanks.

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You dont have to resolder these chips! just get a fine point tool and drag along each leg and press all solders on reverse side to make them reconnect.

Posted on Sep 08, 2009

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