Electrical Component Descriptions - Ricoh G035 Service Manual

ELECTRICAL COMPONENT DESCRIPTIONS

1.6 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.
Symbol Description
Printed Circuit Boards
Printer Controller
PCB1
PCB2 Mother
NIB (Network
PCB3
Interface Board)
BICU (Base Engine &
PCB4
Image Control Unit)
IOB
PCB5 (Input/Output Board)
PFB (Paper Feed
PCB6
Control)
High Voltage Supply
PCB7
PSU
PCB8
(Power Supply Unit)
LDDR
PCB9
(Laser Diode Driver)
PCB10 Main (Duplex)
Motors
M1 Main
M2 Tray Lift
M3 Polygonal Mirror
LD Positioning
M4
M5 Cooling Fan
M6 Exhaust Fan
Toner Supply
M7
M8 PSU Cooling Fan
M9 Inverter (Duplex)
M10 Transport (Duplex)
Sensors
LD Unit Home
S1
Position
Toner Density (TD)
S2
S3 Paper Exit
G035
Controls the PC interface, print image
processing, operation panel, and other
controller options.
Connects the controller to the BICU board.
Interfaces printer to the network.
Controls all printer engine functions both
directly and through other control boards.
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.
Provides DC power to the system and AC
power to the fusing.
Controls the laser diode.
Controls the duplex unit.
Drives the main body components.
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.
Rotates the toner bottle to supply toner to
the development unit.
Removes heat from the PSU.
Drives the inverter roller.
Drives the upper and lower transport rollers.
Informs the CPU when the LD unit is at the
home position.
Detects the amount of toner inside the
development unit.
Detects misfeeds.
1-10
Note Index No.
1
2
3
6
10
9
11
7
17
60
25
37
20
19
26
28
24
8
59
61
18
15
46
SM