Electrical Component Descriptions - Ricoh A193 Service Manual

ELECTRICAL COMPONENT DESCRIPTIONS

5. 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
Symbol
No.
Printed Circuit Boards
PCB1 54
PCB2 50
PCB3 58
PCB4 61
PCB5 62
PCB6 51
PCB7 55
PCB8 52
PCB9 53
Motors
M1 45
M2 36
M3 47
M4 49
M5 37
M6 35
Sensors
S1 33
S2 31
S3 28
S4 27
S5 17
(A193)
Description
High Voltage Supply
Board
Lamp Stabilizer
PSU (Power Supply
Unit)
LD Unit (Laser Diode) Controls the laser diode.
Operation Panel
SBU (Sensor Board
Unit)
IOCSS (Input/Output
& Customer Support
System)
BICU (Base Engine &
Image Control Unit)
MSU (Memory
Supercharge Unit)
Main
Scanner Drive
Transport Vacuum
Fan
Polygonal Mirror
Toner Supply
Exhaust Fan
Upper Exit
Lower Exit
Left Vertical Door
Left Door
Relay
1-8
Note
Supplies high voltage to the drum charge
roller, development roller, transfer roller, and
discharge brush.
Provides dc power for the exposure lamp.
Provides dc power to the system and ac
power to the fusing lamp.
Controls the touch panel display and LED
matrix, and monitors the key matrix.
Contains the CCD, and outputs a video
signal to the BICU board.
Controls the mechanical parts of the printer.
Controls all copier functions both directly or
through other control boards.
Compresses the image data, stores the data,
and applies the image editing.
Drives the main body components.
Drives the 1st and 2nd scanners (dc stepper
motor).
Aids paper transportation from the transfer
roller to the fusing unit.
Rotates the polygonal mirror.
Rotates the toner bottle to supply toner to
the toner supply unit.
Removes heat from around the fusing unit.
Detects paper feed misfeeds from the upper
optional cassette tray.
Detects paper feed misfeeds from the lower
optional cassette tray.
Cuts the +5 and +24 Vdc power lines.
Detects when the left door is open.
Detects the leading edge of paper from the
paper tray and duplex unit to determine the
stop timing of the paper feed clutch and
duplex feed motor. Also detects misfeeds.
SM