Service manual

AR-M351U/M451U, AR-M355U/M455U EXTERNAL VIEWS AND INTERNAL STRUCTURES 5 - 7
7. PWB
A. Scanner unit
B. Engine
No. Name Function/Operation
1 SPF control PWB SPF control
2 Original size detection PWB (Light emitting side) Original size detection when using the table glass
3 CCD PWB (in lens unit) (The lens unit cannot be disassembled.) Image scan (Table glass/SPF surface)
4 SPF original width detection volume PWB SPF original width detection
5 MFP operation PWB Panel operation control
6 Scanner control PWB Scanner unit control
7 LVDS PWB LCD signal relay
8 Original size sensor (Light receiving side) Original size detection when using the table glass
9 CIS unit (in CIS unit) (The CIS unit cannot be disassembled.) Image scan (SPF back surface)
10 CIS interface PWB (in CIS unit) (The CIS unit cannot be disassembled.) CIS signal AD conversion process
11 Scanner interface PWB Scanner unit and connection of scanner control PWB
12 CIS control PWB CIS unit control and image process
13 CL inverter PWB Inverter for copy lamp
No. Name Function/Operation
1 PRT controller Image process, image data communication control
2 PCU PWB Overall control of the machine and options
3 Power supply unit DC power supply
4 LD PWB (Inside LSU) Laser ON control (Inside LSU: LSU cannot be disassembled.)
5 Mother PWB Signal interface between PCU and the controller
6 Reactor PWB (200V only) / Filter PWB (Taiwan only) Noise filter
7 BD PWB Laser control (Inside LSU: LSU cannot be disassembled.)
8 High voltage resistor PWB High voltage load adjustment
9 Cassette detection PWB Paper cassette control
10 Drawer PWB Fan control
11 High voltage PWB High voltage power supply
12 Fuse PWB Protection of the machine when an abnormal power is supplied.
13 Relay PWB HDD back up
1
6
2
3
4
5
7
8
9
10
11
12
13
1
2
7
11
8
10
9
12
3
6
4
5
13