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1501 door message


Dewey5

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Although I am not more familiar with this Grand-pa QSS-1501, I still suggest ..

1)  You checked the wrong door.   (Does machine has > 1 door ?)

2) Check all power supplies output voltages exist ,, or anyone missing or incorrect !

3)  If you have service manual,,  try  [ Input check ] to check door sensor response yes/no.

4) If you have wiring diagram, check where the door sensor wirings go to which pins of which PCB.  Connect a jumper to PCB to bypass the door sensor to eliminate breaking wires somewhere...

5)  If bypass does not work, perhaps you have a bad PCB.

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