Symbol
Index
No.
Description
Note
✽
PCB22
79
Dummy Board
Installed to connect the SCU and EX-IPU
and other cables when the main contoller
board is not present.
Motors
M1
57
Main
Drives the main body components.
M2
66
Toner Bottle Drive
Rotates the toner bottle to supply toner to
the toner supply unit.
M3
73
Tray Lift
Raises the bottom plate in the paper tray.
M4
56
Polygonal Mirror
Turns the polygonal mirror.
M5
48
LCT Lift
Lifts up and lowers the LCT bottom plate.
M6
74
Optics Exhaust Fan
Removes heat from the optics unit.
M7
65
IPU Fan
Removes heat from the IPU board.
M8
78
Exhaust Fan
Removes heat from around the fusing unit.
M9
60
Ozone Fan
Removes ozone-laden air from inside the
machine.
M10
55
Scanner Drive
Drives the 1st and 2nd scanners (dc stepper
motor).
M11
36
Duplex Feed
Drives the feed roller and moves the bottom
plate up and down.
M12
39
End Fence Jogger
Drives the end fence jogger to square the
paper stack.
M13
38
Side Fence Jogger
Drives the side fence jogger to square the
paper stack.
M14
75
DC Drive Board Fan
Removes heat from around the DC drive
board.
M15
68
Charge Inlet Fan
Provides air flow around the charge corona
unit section.
✽
M16
59
Development Drive
Drives the development unit.
Sensors
S1
13
By-pass Feed Paper
Width
Informs the CPU what width paper is in the
by-pass feed table.
S2
15
By-pass Feed Paper
End
Informs the CPU that there is no paper in the
by-pass tray.
S3
18
Tray Paper End
Informs the CPU when the paper tray runs
out of paper.
S4
46
Upper Relay
Detects the leading edge of paper from the
paper tray and duplex unit to determine the
stop timing of the paper feed clutch and
duplex feed motor. Also detects misfeeds.
S5
16
Tray Upper Limit
Detects the height of the paper stack in the
paper tray to stop the upper tray lift motor.
S6
47
Lower Relay
Detects misfeeds.
S7
49
LCT Lower Limit
Sends a signal to the CPU to stop lowering
the LCT bottom plate.
S8
50
LCT Paper End
Informs the CPU when the LCT runs out of
paper.
ELECTRICAL COMPONENT DESCRIPTIONS
25 April 1997
6
