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118 MFP unit explanation ENWW
Cooling fan control
FM1 (MFP cooling/1), FM2 (laser scanner
unit cooling), FM5 (cleaner cooling), FM6
(paper exit /F), FM7 (paper exit/R), and FM8
(main cooling /2) are controlled by PRCB
(printer control board) directly. FM9 (scanner
cooling) is driven by SCDB (scanner drive
board). FM10 (ADU reverse motor cooling)
is driven by ADUDB (ADU drive board) and
is controlled by PRCB. FM13 (power supply
cooling) is driven by DCPS (DC power
supply unit).
1 Operation
A 24 VDC motor is used for each cooling
fan.
a FM1 (MFP cooling/1)
1 ON timing
• During warm-up, starts rotating at a
low speed when M2 (drum) is
turned on.
ADUDB
FM10
PRCB
SCDB
IO DTXD
IO DCLK
ADU LATCH
IO UCLK
REQ1
IO URXD
ACK1
ERR OUT1
DCPS
24V1
P.GND
5V2
24V1
S.GND
ADU FAN/1
ADUFAN EM/1
P.GND
FM8
FM7
FM6
FM9
FM13
FM5
FIXFAN D
CLFAN EM
CLNFAN D
CLFAN HL
P.GND
FIXFAN3 EM
P.GND
24V DRV
SCANFAN CONT-18
SCANFAN EM
24V1
P.GND
FAN1
FAN2
FAN3
EM
P.GND
FIXFAN D
FIXFAN2 EM
P.GND
FM2
WRFAN1 EM
WRFAN1 D
WRFAN1 HL
P.GND
FM1
MAINFAN EM
MAINFAN D
MAINFAN HL 20
P.GND
FIXFAN D
FIXFAN1 EM
P.GND