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Discussion in 'Electronic Repair' started by [email protected], Mar 9, 2007.

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    No sound, ordered a sound IC, non-standard, AN5277 I think.

    Still no sound, and the sig board is two sided, so it is hard to
    trace, so I got a print. Well that was about as helpful as a
    screendoor on a bullfrog. It clearly shows a negative supply going to
    the chip which requires a positive supply.

    I'll email you the friggin schematic, that is what it says.

    Useless, I wish I would've just stuck with it instead of getting the
    print. I have already fixed a real bad one (probably lightning, the
    SMPS was burnt down, and half of the standby feedback network) and did
    plenty of convergence IC jobs.

    Well the print is completely wrong, it must be if the thing ever had
    sound and sure as shit it was. There was another source right next to
    it and what pisses me off is I probably could've found it without the

    It was a bad connection at the SMPS transfornmer. It looked perfect,
    but there was no continuity.

    I basically really found it with a continuity testeer, the thing that
    goes beeeeeep. Remember you have to keep it on there for a few seconds
    because of the caps don't charge, it beeps. I left it on this
    connection for a good minute or more, and it continued to beep. This
    was it.

    Trouble was the connection, once you get the damn chassis so you can
    see it, at the lower left of the SMPS transformer there is a
    connection bad, and it looks good.

    When the print is wrong, that is an attack. I repelled the attack by
    fixing the set, so they don't sell a new one.

    Think like that or die.


    PS, reason I say that is that is this is their product, which they
    designed and built. There is no excuse for their information to be

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