Electrical Component Descriptions - Ricoh A156 Service Manual

5. ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the electrical component layout and the point to point diagram on the
waterproof paper in the pocket for symbols and index numbers.
Index
Symbol
No.
Printed Circuit Boards
PCB1 14
PCB2 12
PCB3 11
PCB4 96
PCB5 1
PCB6 55
PCB7 3
PCB8 8
PCB9 63
PCB10 6
PCB11 102
Motors
M1 88
M2 79
M3 97
M4 86
M5 99
M6 94
M7 95
M8 89
M9 90
M10 92
M11 78
M12 87
M13 77
M14 58
M15 61
A156/A160/A162
Description
Main Control
AC Drive
DC Power Supply
Main Motor Control
CB High Voltage
Supply
T High Voltage Supply Supplies high voltage to the transfer belt.
Operation Panel
Noise Filter (220 ~
240 V machines only)
Duplex Control
(Duplex machines only)
Liquid Crystal Display
(A156 machines only)
LCT Interface
(LCT machines only)
Main
Toner Bottle Drive
Upper Tray Lift
(A153 machines only)
Lower Tray Lift
(A153/A156
machines only)
LCT Lift
(LCT machines only)
Optics Cooling Fan 1 Removes heat from the optics unit.
Optics Cooling Fan 2
(A153/A156
machines only)
Exhaust Fan 1
Exhaust Fan 2
(A153/A156
machines only)
Scanner Drive
3rd Scanner Drive
Lens Vertical Drive
Lens Horizontal Drive Shifts the lens horizontal position.
Duplex Feed
(Duplex machines only)
End Fence Jogger
(Duplex machines only)
1-12
Note
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 rotation of the main motor.
Supplies high voltage to the drum charge
roller and development roller.
Controls the LED matrix, and monitors the
key matrix.
Removes electrical noise.
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.
Drives the main unit components.
Rotates the toner bottle to supply toner to
the toner supply unit.
Raises the bottom plate in the upper paper
tray.
Raises the bottom plate in the lower paper
tray.
Lifts up and lowers the LCT bottom plate.
Removes heat from the optics unit.
Removes the heat from around the fusing unit.
Removes the heat from around the fusing
unit.
Drives the 1st and 2nd scanners (dc stepper motor).
Drives the 3rd scanner (dc stepper motor).
Shifts the lens vertical position.
Drives the feed roller and moves the bottom
plate up and down.
Drives the end fence jogger to square the
paper stack.
STM