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CORONA UNIT SECTION
[6] M7 (charging wire cleaning) Control
M7 DRIVE 1
M7 DRIVE 2
30-B7
30-B6
CB
21-1
21-2
M7 DRIVE 1
M7 DRIVE 2
39-1
39-2
DB
M7
M7 (charging wire cleaning) is driven by the CB (control board)
via the DB (drum relay board).
1. Operation
a. M7 is used to drive the charging wire cleaning unit. Also,
the drive voltage and rotational speed of M7 are as
follows.
Drive voltage: 12 V DC
b. Cleaning of the charging wire takes place if the fixing
temperature is less than 50°C/122°F when the machine
is switched ON.
c. Cleaning operation
The home position of the cleaning unit is on the front side
of the machine. The cleaning unit operates as follows.
Home position
Rear
Cleaning (forward)
Cleaning (return)
Home position (forward stroke)
Home position (return stroke)
2. Signals
a. Output signals
(1) M7 DRIVE 1,2 (CB → M7)
M7 drive signals
The drive direction of M7 is controlled by changing over
the drive current direction of these two signals.
Status M7 DRIVE 1 M7 DRIVE 2
Cleaning forward stroke H L
Cleaning return stroke L H
When stopped L L
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