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Pioneer VSX D814 will not power up - Audio & Video Receivers

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  • Mike Vigil Mar 08, 2008

    Got this from a friend... dead as a door knob, he doesn't remember wha thappened.. just one day it didn't work.. I've been inside the unit.. no obvious suspects..No bad smells.
    Main fuse is OK and correct rating.
    I have found no other VISIBLE fuses ( glass style ) but there are surface mounts on a PCB for the power transformer, on the secondary side for the amp AC rails.. those are fine as well.

    yes I have tried unplugging & repowering a few times.

    The standby powers system works & there is 5V to the on / off sw.
    if you press the button nothing happens.. nor tries to.nothing is displayed.No error codes.

    The outputs are Sanyo large scale monoblock chips ( 2 of them )

    thought's?
    Thanks
    Mike

  • Mike Vigil Mar 08, 2008

    And no blown caps ( at least not venting or party popped )

  • Mike Vigil Mar 08, 2008

    And SORRY VSX-517 not 817 ( I was ordering a part for my 817 when I posted this )

  • Mike Vigil Mar 18, 2008

    Actually nothing.. reciever is still dead as a door knob.. sitting on my project bench.. waiting for guidance... I did however stumble across the following.. in the bigger units there is a pad for an LED behind the power switch.. which in this case, on this model is not stuffed.. I get a 1 second 5 volt pulse...

    I assume this would be a blinking LED..
    I would further assume RED..

    the front display does nothing.. no error codes.

    HELP!

    Thanks
    Mike

  • Mike Vigil Mar 20, 2008

    Just putting out there again for more input

  • Mike Vigil Mar 20, 2008

    Replaced the glass fuse.. no change

    Voltage on both sides of fuse.... since the +5 supply is alive...

    I'll look into getting a factory service manual
    and see about this reset.....

    Mike

  • Mike Vigil Mar 20, 2008

    Pioneer VSX-517
    Putting the this ball in the air again

  • Mike Vigil Mar 21, 2008

    OK guys here's the REAL DEAL...
    The 517 will NOT power up nor show any display IF it has detected an amp error in it's past... it will just do a DUH! Like I was having. You can force the unit to power up by pressing the direct button & enter for 2 seconds.. it will cycle through a start up then trip a general error code.. in my case AMP ERROR...the unit will keep alive for about 2-3 seconds.. then full shutdown..There are 5 wires from the output chips to the relay section of the board ( white, red, brown, blue, yellow ) these correspond to the output devices.. in my case 1/2 of the STK412-530 ( brown ) right surr was playing grab the rail and putting out 63 volts! WOO HOO... on that 1/2 of the device the output was on pin 11 which I cut
    so no output would get to the board, nor the fancy pants error detection circuts.. and BINGO I'm running on 4 of 5.1 channels.

    The unit powers up & down properly and all the displays & buttons function normally.

    I'll now find a source for the monoblock amp's and I'm done.

    Hope this helps someone else in the not to distant future.

    Thanks for the assist's

    Mike

  • Mike Vigil Mar 22, 2008

    Jamie..
    I figgured it out read my last post

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Have you connected this device with the speakers and try to get some sound out of it?
The reason I ask is because in many cases the voltage that powers up the front display is missing but everything else works, I have fixed quite a few receivers with that same failure but not this model in particular. If you have the schematic diagram, check for 32 volts DC that powers up the front display.
I would suggest to check the AC voltage that comes out of the big transformer, if the AC is there; check for DC around the biggest capacitors.
Let me know if you require further assistance.

Posted on Mar 20, 2008

  • Jaime Hernandez Mar 25, 2008

    Thank you for the great feedback vigvette.

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I think that the microprocessor is probably smoked. Look for the main power relay. It will be on the same board as the standby transformer. There should be a small TO-92 style transistor very close by. Short the pins (center and one leg) and you should here the relay click on. If the unit powers up OK, then the problem is most likely the micro.
Dan

Posted on Mar 20, 2008

  • ABRsvcs Mar 20, 2008

    A factory "reset" won't fix this. Try turning on the unit by shorting the legs of the relay driver like I suggested. With the unit being off as long as you have described, the "reset" should have already occurred. I'll look up the micro part number tonight.

    Dan

  • ABRsvcs Mar 22, 2008

    You can search the web for the STK or you can get this directly from Pioneer. If you can get to a Pioneer distributor, the part will be less that from Pioneer directly.

    Dan

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Hi,

Your receiver has internal overload protection systems to prevent permanent damage. On SOME Pioneer models, these can be "reset" but you can't do it yourself. Your dealer or authorized service center must do so.

Goodluck..

Posted on Mar 20, 2008

  • Priya darshan Mar 20, 2008

    I also suggest you to try replacing the glass fuse once before taking it to the service center.

  • Priya darshan Mar 20, 2008

    I also suggest you to try replacing the glass fuse once before taking it to the service center.

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Problem is at what level.

how much have you got solved?

Posted on Mar 16, 2008

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  • 796 Answers

Hello

Posted on Mar 08, 2008

  • isaac johny
    isaac johny Mar 08, 2008

    did you try removing the input power cord and again replacing it again....

    did you view any error code before???

  • isaac johny
    isaac johny Mar 08, 2008

    check to see if you put the correct fuse in the receiver, and if it is
    the correct one, you will need to check the protection circuit because
    with it being turned up so loud the amp was probably damaged. in most
    cases with protection circuits you will probably find your problem with
    an output transister. than check for blown caps.

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