Ricoh A172 - 5. Electrical Component Descriptions

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