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Control signal of main motor
• MMTR-0 signal:
This signal switches the ON/OFF of the main motor. When this signal becomes "L" level, the motor
starts rotating, and when it becomes "H" level, the motor stops.
• MMTRCCW-1 signal:
This signal switches the rotation direction of the main motor. When this signal becomes "L" level, the
motor rotates clockwise seen from the rear side, and the drum and developer unit, etc. start driving.
• MMTRCKA signal:
This signal is a reference clock which keeps the main motor rotation at a constant speed.
• MMTRPLL-1 signal:
This is a signal to show that the main motor rotation is in the lock range. When the cyclic change of
the FG pulse period against the reference clock is within (6.25%, this is defined as a lock range (the
normal rotation of the motor) in the main motor. When it is within this range, this signal becomes "L"
level.
• MMTRBK-0 signal:
This signal applies a brake on the main motor. When this signal becomes "L" level, a brake is
applied to the rotation of the motor.
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