Oki OKIPAGE 8p Maintenance Manual page 141

(2) Motor drive control
Time T0 to T3 determines the motor speed, while the phase different direction between
phase signals DMPH1-P and DMPH2-P determines the rotation direction. DMON-N signal
control a motor coil current. According to the polarity of the phase signal, the coil current flow
as follows:
1) +26V → SW1 → motor coil → SW4 → resistor → earth
2) +26V → SW3 → motor coil → SW2 → resistor → earth
The drop voltage across the resistor is input to comparator, where it is compared with a
reference voltage. If an overcurrent flows, a limiter operates to maintain it within a certain
fixed current.
(3) Electromagnetic clutch control
Mechanical operation mode is switched by the combination of the clutch status and the
direction of motor rotation.
clutch status
off
off
on
on
rotation direction
Forward
Reverse
Forward
Reverse
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operation mode
cleaning
Hopping from manual
feed slot
illegal operation
Hopping from tray