DEVELOPING UNIT
2-G-8
2 UNIT EXPLANATION
[9] FM4 (Developing Suction) Control
FM4 (developing suction) is controlled by PRCB
(printer control board).
1. Operation
a. ON timing
FM4 (developing suction) is turned ON when M2
(drum) is turned ON.
b. OFF timing
FM4 (developing suction) is turned OFF after a
lapse of the specified time from turning OFF of
M2 (drum).
2. Signals
a. Input signal
(1) FM2 EM (FM4 to PRCB)
FM4 (developing suction) abnormality detection
signal
[L]: FM4 is normal.
[H]: FM4 is abnormal.
b. Output signal
(1) SUCTFAN_D (ACDB to FM4)
FM4 (developing suction) drive signal
[L]: FM4 OFF
[H]:FM4 ON
FM4
PRCB
SUCTFAN D
SFAN EM
P.GND
DCPS
24V1
5V2
S.GND
P.GND
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