Ricoh G031, Руководство по обслуживанию

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