Electrical Component Descriptions - Ricoh B022 Service Manual

1.5 ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the electrical component layout on the reverse side of the point-to-point
diagram for the location of the components.
Symbol Name
Motors
M1 Scanner
M2 Polygonal Mirror
M3 Main
M4 Exhaust Fan
M5 Upper Paper Lift
M6 Lower Paper Lift
Toner Supply
M7
Magnetic Clutches
MC1 Upper Paper Feed
MC2 Lower Paper Feed
MC3 Upper Relay
MC4 Lower Relay
MC4 Registration
Switches
SW1 Main
SW2 Right Upper Cover
SW3 Right Cover
SW4 Right Lower Cover
SW5 Upper Paper Size
SW6 Lower Paper Size
SW7 New PCU Detect
SW8 Front Cover Safety
SW9 Operation
Sensors
S1 Scanner HP
S2 Platen Cover
S3 Original Width
S4 Original Length 1
SM
ELECTRICAL COMPONENT DESCRIPTIONS
Function
Drives the 1st and 2nd scanners.
Turns the polygonal mirror.
Drives the main unit components.
Removes heat from around the fusing unit.
Raises the bottom plate in the 1st paper tray.
Raises the bottom plate in the 2nd paper tray.
Rotates the toner bottle to supply toner to the
development unit.
Starts paper feed from the 1st paper tray.
Starts paper feed from the 2nd paper tray.
Drives the upper relay rollers.
Drives the lower relay rollers.
Drives the registration rollers.
Provides power to the machine. If this is off, there is
no power supplied to the machine.
Detects when the right upper cover is open.
Cuts the +5VLD and +24V dc power line and detects
when the right cover is open.
Detects when the right lower cover is open.
Determines what size of paper is in the upper paper
tray.
Determines what size of paper is in the lower paper
tray.
Detects when a new PCU is installed.
Cuts the +5VLD and +24V dc power line and detects
when the front cover is open.
Provides power for machine operation. The machine
still has power if this switch is off.
Informs the CPU when the 1st and 2nd scanners are
at home position.
Informs the CPU that the platen cover is in the up or
down position (related to the APS/ARE functions).
Detects original width. This is one of the APS (Auto
Paper Select) sensors.
Detects original length. This is one of the APS (Auto
Paper Select) sensors.
1-11 B022/B027