TM 5-6675-324-14
(1) Auto shutoff circuit. If there is no copying action or keystrip input for
30 min, the SOFF command will be generated. (Q203-30 = 1.) This turns Q252 and
Q251 on, so Q251 provides a current path through the coil of power switch SW1 and
turns the power switch off. Output from Q203-30 is also used as the MPUSD signal.
If a DRMD command is present at the same time, the output of inverting driver Q208-
15 becomes O, so Q252 and Q251 switch off and the auto shutoff function is bypassed,
so the copier continues to function. The auto shutoff circuit can be switched over
to a 2 hr period by removing the jumper wire.
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