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14 August 1997
1.3 ELECTRICAL COMPONENT DESCRIPTIONS
Refer to the electrical component layout and the point-to-point diagram on the
waterproof paper in the pocket for the locations of these components.
: New or modified components.
Symbol
Index
No.
Printed Circuit Boards
PCB1
90
SCU
PCB2
89
AC Drive
PCB3
92
DC Power Supply
PCB4
93
BCU
PCB5
80
Charge High
Voltage Supply
PCB6
85
High Voltage
Control
PCB7
87
Operation Panel
PCB8
95
Scanner Drive
PCB9
81
EX-IPU
PCB10
84
SBU
PCB11
94
Lamp Stabilizer
PCB12
86
Main Scan
Synchronization
Detector - 1
PCB13
83
Main Scan
Synchronization
Detector - 2
PCB14
31
Transfer High
Voltage
PCB15
33
Development
Bias Power Pack
PCB16
40
Duplex Control
PCB17
N/A
Liquid Crystal
Display
PCB18
51
LCT Interface
PCB19
91
Relay Board
PCB20
7
Laser Diode Drive
Motors
M1
57
Main
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ELECTRICAL COMPONENT DESCRIPTIONS
Description
Controls all copier functions both directly or
through other control boards.
Provides ac power to the exposure lamp and
fusing lamps.
Provides dc power.
Controls the mechanical parts of the printer.
Supplies high voltage to the charge corona
unit.
Controls the high voltage boards and the
quenching lamp.
Controls the touch panel display and LED
matrix, and monitors the key matrix.
Drives the scanner motor.
Processes the video signal from the SBU and
sends the video signal to the LD unit.
Contains the CCD, and outputs a video
signal to the EX-IPU board.
Provides dc power for the exposure lamp.
Detects the laser beam at the start of the
main scan.
Detects the laser beam at the end of the main
scan.
Supplies high voltage to the transfer belt.
Supplies high voltage to the development
roller.
Controls the operation of the duplex tray.
Controls the guidance display and displays
guidance for machine operation.
Interfaces the LCT control signal between the
main board and the LCT.
Switches ac power to either the dc drive
board (if the main switch is on) or to the
heaters (if the main switch is off).
Controls the laser diode.
Drives the main body components.
5
Note
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