AR-M256/M257/M258/M316/M317/M318/5625/5631 EXTERNAL VIEW AND INTERNAL STRUCTURE 6 - 6
G. PWB unit
H. Section
21 2nd cassette paper
pass sensor
PFD2 2nd cassette paper pass
22 2nd cassette paper
upper limit detection
sensor
LUD2 2nd cassette paper upper
limit detection
23 2nd cassette paper
empty sensor
PED2 2nd cassette paper empty
detection
24 1st cassette paper
pass sensor
PPD1H 1st cassette paper pass
25 1st cassette paper
upper limit detection
sensor
LUD1 1st cassette paper upper
limit detection
26 1st cassette paper
empty sensor
PED1 1st cassette paper empty
detection
27 Toner sensor Toner density detection
28 Center tray paper
YES/NO sensor
LOEMP Center tray paper YES/NO
detection
29 Main switch PSSW Main power switch
30 Original size sensor DSIN0 Document size detection
(Inch series: PD1, 2)
(AB series: PD1 – 3)
31 Reverse pass paper
detection sensor
DUP2
Reverse pass detection
No. Name Function and operation
1 Inverter PWB Copy lamp control
2 CCD PWB For image scanning (read)
3 Option connector PWB
4 IMC PWB Image process
5 MCU PWB Main unit control
6 Mother board Connection with FAX PWB and
PCL PWB
7 Tray interface PWB 2nd tray control
8 DC power supply PWB DC voltage control
9 High voltage PWB High voltage control
10 KEY PWB
11 OPU PWB Operation panel control
No. Name Code Function and operation
1
2
3
4
5
6
7
8
9
10
11
No. Name Function and operation
1 Copy lamp Image radiation lamp
2 Copy lamp unit Operates in synchronization with
2nd/3rd mirror unit to radiate
documents sequentially.
3 LSU unit Converts image signals into laser
beams to write on the dum.
4 Lens unit Reads images with the lens and
the CCD.
5 MC holder unit Supplies negative charges evenly
on the drum.
6 Paper exit roller Paper exit roller
7 Transport roller Paper transport roller
8 Upper heat roller Fuses toner on paper.
(with the Teflon roller)
9 Lower heat roller Fuses toner on paper.
(with the silicone rubber roller)
10 Drum unit Forms images.
11 DUP transport follower
roller
Duplex paper transport
12 DUP transport roller Duplex paper transport
13 Transport roller Transfer images on the drum onto
paper.
14 Resist roller Synchronize the paper lead edge
with the image lead edge.
15 Manual feed tray Manual feed paper tray
16 Manual paper feed roller Picks up papers in manual paper
feed port.
17 Manual feed transport
roller
Transports paper from the manual
paper feed port.
18 1st cassette pick-up roller Picks up paper from the cassette.
19 1st cassette paper feed
roller
Transports the picked up paper to
RESIST section.
20 2nd cassette pick-up
roller
Picks up paper from the cassette.
21 2nd cassette paper feed
roller
Transports the picked up paper to
RESIST section.
22 MG roller Puts toner on the OPC drum.
23 2nd/3rd mirror unit Reflects the images from the copy
lamp unit to the lens unit.
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