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5. ELECTRICAL COMPONENT DESCRIPTIONS
Refer to the electrical component layout on the large sheet diagrams in the
pocket at the end of this documentation for symbols and index numbers.
Symbol
Name
Printed Circuit Boards
DC power supply
PCB1
Lamp regulator
PCB2
AC drive
PCB3
High voltage supply -
PCB4
C/G
High voltage supply -
B
PCB5
High voltage supply -
PCB6
T1/PCC/BR
High voltage supply -
PCB7
T2
High voltage supply -
PCB8
D
Main control
PCB9
Interface 1
PCB10
Interface 2
PCB11
Transfer belt motor
PCB12
drive
Paper feed interface
PCB13
Noise filter
PCB14
ID sensor
PCB15
Operation panel
PCB16
PCB17
Polygon motor drive
CCD
PCB18
Scanner control
PCB19
Scanner drive
PCB20
PCB21
Image Discriminate
Display Editor
interface
PCB22
A172/A199
Function
Provides dc power.
Provides dc power for the exposure lamp.
Provides ac power for the hot roller and
pressure roller fusing lamps.
Supplies high voltage to the charge corona
and grid plate.
Supplies high voltage to the Y/M/C/Bk
sleeve rollers as development bias or to the
OPC drum for drum potential sensor
calibration.
Supplies high voltage to the belt bias roller,
pre-cleaning corona, and cleaning bias roller.
Supplies high voltage to the transfer roller.
Supplies high voltage to the paper discharge
plate.
Controls all copier functions both directly or
through other control boards.
Interfaces the input/output of electrical
components with the main control board.
Interfaces the input/output of electrical
components with the main control board.
Controls the speed and direction of the
transfer belt motor.
Interfaces the input/output of electrical
components in the paper supply unit with the
main control board.
Removes electrical noise.
Detects the density of the ID sensor pattern.
Controls the touch panel display and
monitors the key matrix.
Controls the polygon motor speed.
Converts the light reflected from the original
into analog electrical signals for the three
basic colors (R/G/B).
Processes R/G/B video signals from the
CCD board to be sent to the IPU board.
Interfaces the input/output electrical
components in the optics cavity with the
scanner control board.
Used for anticounterfeiting.
Interfaces the operation panel board with the
IPU board (A172 copier only).
1-14
Index No.
20
1
11
12
26
13
17
22
15
21
18
14
19
23
127
25
8
9
7
3
6
10
SM
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