Checking the power supply system
Is 13V outputted to pins (9) and (11) of
P1707?
Is 6V outputted to pins (1) and (3) of
P1707?
Go to "Checking the power unit".
Go to "Checking the power unit".
Is the connector of P1707 fully inserted?
Is the voltage of 6V applied to both ends?
Replace the thermal fuse.
Is B+5VA outputted from IC1707?
Check IC1707 and its peripheral circuits.
Is Bu+5V outputted from IC1701?
Check IC1701 and its peripheral circuits.
Is Bu+3.3V outputted from IC1702?
Check IC1702 and its peripheral circuits.
Is Bu+2.5V outputted from IC1703?
Check IC1703 and its peripheral circuits.
Go to "Checking the peripheral circuits of
the microprocessor".
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
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