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Stereo featuring 5 disc CD changer, cassette player, and AM/FM radio. Model number SA-PM17.

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Appliance switches back on when placed on standby mode

Hi, appliance won't stay switched off when switched off via remote or standby switch on appliance. It turns off for a few seconds then switches back on withbthe welcome message again. Only way to stop it turning back on is at the wall

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This is the service manual.

This is the standby control circuit.

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My first guess is the relay on the lower right is stuck, or the control circuit has a malfunction and is holding the relay closed.

Q575 turns it off/on and is controlled directly by the micro. Standby/SysV6 circuitry on the micro schematic sheet may also be involved.

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