Service manual

5.
ELECTRICAL COMPONENT LIST
5.1 PRINTED CIRCUIT BOARDS
Symbol Name Function Remarks
PCB1 Lamp regulator Supplies dc power for the exposure lamp.
PCB2
Scanner motor drive
board
Supplies dc power for the scanner motor.
PCB3
CCD board Converts the light reflected from the original
into signals.
PCB4
AC drive/
DC power suppy
Supplies ac and dc power.
PCB5
Scanner IPU board Converts the RGB image signal from the
CCD to a KCMY signal and sends it to the
printer and SCU.
PCB6 Main control board Controls the printer sequence.
PCB7
I/O control board 1 Interfaces the sensors, clutches, solenoids
and motors in the printer module with the
main control board. Includes temperature
and humidity sensors.
PCB8
I/O control board 2 Interfaces the sensors, clutches, solenoids
and motors in the printer module with the
main control board.
PCB9 LD drive board Controls the LD output.
PCB10
Laser synchronizing
detector board 1
Detects laser main scan synchronization
while writing the latent image to the drum.
PCB11
Laser synchronizing
detector board 2
Detects laser main scan synchronization
while writing the latent image to the drum.
PCB12 IDU board Discriminates image for anti-counterfeiting
PCB13
By-pass paper width
detection board
Detects the paper width in the by-pass feed
table.
PCB14
High voltage supply
board
Supplies power to the corona units.
PCB15
System control unit
(SCU) board
Controls the system.
PCB16 RAM board Stores the copy process data and counters.
PCB17 Operation panel Used to operate the copier.
PCB18
Extended IPU board Converts scanned image data and sends it
to SCU for the display. Performs image
processing on an area specified in the
display.
A189
copier
only
PCB19
Duplex control board Controls the duplex unit. A187/A189
copiers
only
Overall
Machine
Information
ELECTRICAL COMPONENT LIST
SM 1-27 A166/A187/A189
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA