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Help with Onkyo Reciever no output

Discussion in 'Electronic Repair' started by Boboranntrottier, Feb 6, 2007.

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  1. I'm working on a Onkyo A-SV610 Pro receiver with no outputs . I've tracked
    it down to not getting a low signal from the UDP6345 that controls the
    output relays.
    I can short out an output and enable the main or remote speakers so I know
    I'm on the right track. It gets clocks and inputs when I hit the mail
    speaker switch.
    The odd thing is that the remote speaker button don't seem to be working
    either by generating input to the 6345 or by lighting the remote label on
    the display.Before I assume its the 6345 or rip apart the front panel I
    thought I'd see if anyone has seen this before and can explain why the
    remote speaker switch wouldn't be working
    Also any suggestions on where to get the UDP6345 would be appreciated
    in Advance
  2. Arfa Daily

    Arfa Daily Guest

    If you do force the relays, does it actually work ok ? Are you sure that the
    driver chip is not failing to be enabled, because a fault condition such as
    an output DC offset is being detected ?

  3. If I ground the outputs of the chip the appropriate relay closes and it
    sounds great. The inputs all appear to be as expected Enable high clock and
    input when I push the button . so I'm thinking its either the chip or
    somehow the remote speaker selector not working is corrupting the input
    signal such that the internal shift register is out of sync.
    I might put a logic analyzer on it tomorrow as a final test
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