Read Sharp AR-M550 (serv.man10) Service Manual online
AR-M550/M620 EXTERNAL VIEW AND INTERNAL STRUCTURE 5 - 16
G. PWB (Main unit section)
VFM-BKR
VFM-BKR
Process paper exit fan motor
5
5
DC brushless
motor
motor
Exhaust heat from the
fusing section.
fusing section.
PWM control
VFM-BKU
VFM-BKU
Paper cooling fan motor
DC brushless
motor
motor
Cools paper on the inner
tray.
tray.
PWM control
VFM-EX1
VFM-EX1
Process paper exit fan motor
1 (Front side)
1 (Front side)
DC brushless
motor
motor
Exhaust ozone and heat
from the process section.
from the process section.
PWM control
VFM-EX2
VFM-EX2
Process paper exit fan motor
2 (Center)
2 (Center)
DC brushless
motor
motor
Exhaust ozone and heat
from the process section.
from the process section.
PWM control
VFM-EX3
VFM-EX3
Process paper exit fan motor
3 (Rear side)
3 (Rear side)
DC brushless
motor
motor
Exhaust ozone and heat
from the process section.
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
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.
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.
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
reception PWB
Generates the document size detection signal.
17
Document size detection light
emitting PWB
emitting PWB
Generates lights to detect the document size.
18
Fusing roller bias high voltage
PWB
PWB
Provides the fusing roller bias voltage.
Not used
Code
Signal
name
Name
Type
Function/Operation
Active
condition
MODEL
NOTE
1
22
2
26
27
3
4
5
6
8
29
28
7
9
10
30
30
11
12
20
25
24
14
15
18
23
13
16
17
31
32
19
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