Electrical Component Descriptions - Ricoh G031 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
High Voltage Supply
PCB1 Board
Power Supply Unit
PCB2
(PSU)
PCB3 LD Drive Board
Control Panel
PCB4
Engine Control Board
PCB5 (ECB)
Printer Control Board
PCB6
Motors
M1 Main
M2 Polygonal Mirror
M3 Exhaust Fan
Sensors
S1 Fusing Exit
Tray Paper End
S2
Tray Paper Near-end
S3 (G031)
By-pass Tray Paper
S4
Registration
S5
S6 Toner Near-end
Switches
SW1 Main
Front Cover Safety
SW2
Tray Paper Size
SW3
(G031)
G031/G032
Note
Supplies high voltage to the drum
charge roller, development roller, and
transfer roller.
Provides dc power to the system and
ac power to the fusing lamp.
Controls the laser diode.
Controls the display panel, LED, and
the touch key pad.
Controls all base engine functions
either directly or through other control
boards.
Controls the PC interface, print image
processing, operation panel, and
other controller options.
Drives the main body components.
Turns the polygonal mirror.
Removes heat from the printer.
Detects misfeeds.
Informs the CPU when the paper tray
runs out of paper.
Informs the CPU when the amount of
paper in the tray becomes low (50±30
sheets).
Informs the CPU when there is paper
on the by-pass tray.
Detects the leading edge of the paper
to determine when to stop the paper
feed clutch, and detects misfeeds.
Detects when toner is low.
Supplies power to the machine.
Cuts the +5VLD and +24 V dc power
lines and detects whether the front
cover is open or not.
Determines the size of paper in the
paper tray, based on the dial setting.
1-10
Index No.
G031 G032
4 4
22 3
5 18
17 14
2 1
25 21
6 5
24 20
3 2
18 12
14 11
16 —
11 10
10 9
13 8
23 19
21 17
9 —
SM