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Yamaha PSR-60

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  • Yamaha PSR-60

    Once again I'm at a loss. This is an inexpensive keyboard with auto rhythm and such.

    When it is powered on most of the LEDs light and only one sound plays. The volume control works but no other button has any affect.

    I do not have a schematic but found a copy of the service manual. It lists some reset procedures but they were not helpful.

    Frankly this isn't worth putting much of my time into, but I would to give it a try. Any ideas on where I should start? I've checked the power supply and it is fine.

  • #2
    Yamaha PSR-60 Schematics

    Are you sure the 2.5 Vdc power rail is good?
    There cannot be any Vac ripple.
    Here are the schematics.
    Attached Files

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