: Feb. 9 2004
1
AR-M550/M620/M700 EXTERNAL VIEW AND INTERNAL STRUCTURE 5 - 16
G. PWB (Main unit section)
VFM-BKL VFM-BKL Process exhaust fan motor 4 DC brushless
motor
Exhaust ozone and heat
from the process section.
PWM control
VFM-BKR VFM-BKR
Fusing exhaust fan motor DC brushless
motor
Exhaust heat from the
fusing section.
PWM control
VFM-BKU VFM-BKU Paper cooling fan motor DC brushless
motor
Exhaust heat from paper in
the inner tray.
PWM control
VFM-EX1 VFM-EX1
Process exhaust fan motor 1
(Front side)
DC brushless
motor
Exhaust ozone and heat
from the process section.
PWM control
VFM-EX2 VFM-EX2
Process exhaust fan motor 2
(Center)
DC brushless
motor
Exhaust ozone and heat
from the process section.
PWM control
VFM-EX3 VFM-EX3
Process exhaust fan motor 3
(Rear side)
DC brushless
motor
Exhaust ozone and heat
from the process section.
PWM control
No Name Function/Operation MODEL NOTE
1 AC power PWB Controls the AC power.
2 CCD PWB Scans document images.
3
CIS control PWB/CIS unit Scans document images (back surface) and controls the CIS unit.
4 DC main power PWB Generates the DC power.
5 DC sub power PWB Generates the DC power in the power save mode.
6 LVDS/INV PWB Generates the LCD display signal, and generates a high voltage for
backlight.
7 MFP FLASH ROM PWB Stores the MFP control program.
8 MFP controller PWB Controls the image-related items and controls all over the machine.
9 Mother PWB Interfaces the MFP control PWB and the PCU PWB.
10 PCU FLASH ROM PWB Stores the PCU control program.
11 PCU PWB Controls the engine section.
12 SPF PWB Drives the SPF section loads./ Interfaces the sensor and detector
signals.
13 SPF paper width detection PWB Detects the SPF paper tray paper width.
14 Image density sensor PWB Detects the toner patch density in the image density correction.
15 OPC drum mark sensnor PWB Detects the OPC drum mark.
16 Document size detection light
reception PWB
Generates the document size detection signal.
Code
Signal
name
Name Type Function/Operation
Active
condition
MODEL NOTE
1
1
1
1
1
1
1
22
2
26
27
3
4
5
6
8
28
7
9
10
30
11
12
20
25
24
14
15
23
13
16
17
31
32
19
33
1
1
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