Gestetner A193 Service Manual page 440

ELECTRICAL COMPONENT DESCRIPTIONS
3. 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
High Voltage Supply
PCB1 54 Board
PCB2 50 Lamp Stabilizer
PSU
PCB3 58
PCB4 61 LD Unit
Operation Panel
PCB5 63
SBU
PCB6 51
PCB7 55 IOCSS
BICU
PCB8 52
MSU
PCB9 53
Polygon Motor Driver
PCB10 62
(A224 only)
Motors
M1 45 Main
Scanner Drive
M2 37
Transport Vacuum
M3 47
Fan
M4 49 Polygonal Mirror
Toner Supply
M5 38
M6 35 Exhaust Fan
Fusing Unit Fan
M7 46
(A224 only)
Sensors
S1 33 Upper Exit
S2 31 Lower Exit
S3 28 Left Vertical Door
S4 27 Left Door
Relay
S5 17
A224
Description
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 laser diode.
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 polygon motor.
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.
Turns the polygonal mirror.
Rotates the toner bottle to supply toner to
the toner supply unit.
Removes heat from around the fusing unit.
Removes heat from around the fusing unit.
Detects misfeeds.
Detects misfeeds.
Cuts the +5 and +24 Vdc power lines.
Detects whether 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.
13-6
Note
SM