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DEVELOPING UNIT
PGND 99-4
DCPS
FM30 DRIVE
FM30 LD
FM30 H/L
65-A1
65-A2
65-A3
CB
FM30
(5) M3 CLK (CB → M3)
Reference clock signal for controlling the speed of M3
(6) M3 H/L (CB → M3)
M3 rotational speed control gain switching signal
[L]: Low speed range
[H]: High speed range
(7) M4CONT (CB → M4)
M4 drive control signal
[L]: M4 ON
[H]: M4 OFF
(8) M4 H/L (CB → M4)
M4 rotational speed switchover signal
Normally [H]: 370 mm/sec
(9) M4 CLK (CB → M4)
Reference clock signal for M4 speed control
[10] FM30 (developing suction) Control
FM30 (developing suction) is controlled by the CB (control
board) .
1. Operation
FM30 is a 24 V DC motor.
It goes ON and OFF in synchronism with M1 (main).
2. Signals
a. Input signals
(1) FM30 LD (FM30 → CB)
[L] is output when FM30 reaches the specified speed.
(2) FM30 DRIVE (CB → FM30)
Drive control signal for FM30
[L]: FM30 OFF
[H]: FM30 ON
(3) FM30 H/L (CB → FM30)
FM30 rotational speed control signal.
This signal is always [L].
DEVELOPING UNIT-1
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