OKIDATA Pacemark 3410 Service Manual page 38

+38 vdc Printhead Space Motor Line Feed Motor Bail Motor Drive Voltage
POW ALM Output from the Power Supply in the event of an abnormal temperature rise in the
power supply unit or an overcurrent condition of the +38 vdc. The main logic
board suppresses this condition by temporarily suspending printing. If the
condition does not change the main logic board will enable the FAN ALARM.
Refer to Section 4 - Failure Analysis
ALM Input from the main logic board upon detection of an overdrive condition in the
printhead line feed motor or bail motor drive circuits. Upon detecting this signal
the power supply disables the +38 vdc output.
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