2.4.6 Timing chart
Operation at power on
Description
❈1 Switching a relay conducts normal/reverse
operation of the cleaner motor.
When the cleaner and motor stops during operation,
excessive current in the motor is detected to
transmit lock signals to the main control board.
The lock signal is also generated when the cleaner
unit hits the rear end block of the corona unit during
the normal wire cleaning operation. This switches
the relay and the cleaner unit is returned to the
home position.
Even if the cleaner stops at some point other than the
home position, a reverse signal is input to return the
cleaner at power on.
Motor operation time is for 30 seconds at the most, and
if during this time a lock signal is not generated, the
motor stops.
For the cleaning operation at power on after 20,000
copies, a normal turn signal is output regardless of
the cleaner position, and the cleaner starts moving
to the rear.
Timing
Item
Cleaner motor
Main motor
Charge output
Grid output
Ozone exhaust
fan 1
Ozone exhaust
fan 2
Copy stand-by
Main switch ON
175°C (Fusing temperature)
❈1
❈2
❈2
DC motor
DC drive board
Lock
Motor
ON
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