Electrical Component Descriptions - Ricoh A230 Service Manual

ELECTRICAL COMPONENT DESCRIPTIONS

1.6 ELECTRICAL COMPONENT DESCRIPTIONS
Refer to the electrical component layout on the point to point diagrams for the
locations of these components.
Index
Symbol
No.
Printed Circuit Boards
PCB1 58
PCB2 55
PCB3 61
PCB4 62
PCB5 63
PCB6 9
PCB7 7
PCB8 11
PCB9 4
PCB10 19
PCB11 54
Motors
M1 35
M2 8
M3 45
M4 22
M5 20
M6 36
M7 37
A230/A231/A232
Description
BICU (Base
Engine & Image
Control Unit)
PSU (Power
Supply Unit)
IOB
(Input/Output
Board)
Paper Feed
Control (PFB)
High Voltage
Supply
SBU (Sensor
Board Unit)
SIB (Scanner
Interface Board)
Operation Panel
Lamp Stabilizer
LDDR (Laser
Diode Driver)
SIFB (Scanner
Interface Board)
Main
Scanner Drive
Tray Lift
Polygonal Mirror
LD Positioning
Cooling Fan
Exhaust Fan
Note
Controls all copier functions both directly
and through other control boards.
Provides dc power to the system and ac
power to the fusing lamp and optional
heaters.
Controls the mechanical parts of the
printer (excluding the paper feed section),
and the fusing lamp power.
Controls the mechanical parts of all paper
feed sections.
Supplies high voltage to the drum charge
roller, development roller, and transfer
belt.
Contains the CCD, and outputs a video
signal to the BICU board.
Controls the scanner carriages and
passes signals from the scanner unit to
the BICU board.
Controls the LCD and LED matrix and
monitors the key matrix.
Provides dc power to the exposure lamp.
Controls the laser diode.
Passes signals between the SIB and
BICU boards.
Drives the main body components.
Drives the 1st and 2nd scanners.
Raises the bottom plate in the paper tray.
Turns the polygonal mirror.
Rotates the LD unit to adjust the LD
beam pitch when a different resolution is
selected.
Removes heat from the main PCBs.
Removes heat from around the fusing
unit.
1-12
Rev. 7/98
SM