Main Pcb - Kyocera Mita KM-1810 Service Manual

2A1/2

2-3-2 Main PCB

CPU
(IC11)
*: Optional.
**: Optional for the 15 cpm copier/standard for the 18 cpm copier.
The main PCB (MPCB) consists mainly of the CPU IC11. It communicates with the printer controller and controls the
memory PCB, image processing system and engine drive system.
The CPU IC11 operates on an 8-bit bus. It uses the SRAM IC12, IC15 and IC17 for work memory and backup memory. In
accordance with the control program in FEEPROM IC55, the CPU IC11 communicates with the printer controller via the
serial communication function in the CPU. The CPU IC11 also controls the CCD PCB (CCDPCB), which is for image input
control, and the LSU, which is for image output control, via the image processing ASIC MIP IC21, and drives the operation
section and machine, conveys paper and detects abnormalities via XIO IC31.
2-3-4
Main PCB
ADC
(IC43)
MIP
(IC21)
FEEPROM
(IC55)
SRAM XIO
(IC12,14,15) (IC31)
Control signal output
Detection signal input
Figure 2-3-3 Main PCB block diagram
Clock signal
Analog image data
ODD
S/H IC
EVEN
(IC41)
Print data
BUF
Printer data
Memory image data
Address bus
Data bus
Control signal
output
Driver
Detection signal input
Driver
CCD PCB
LSU
Printer controller*
Memory PCB**
SDF (15 cpm)
ADF (18 cpm)
Optional drawer*
Operation unit PCB
Drive unit
Scanner unit
Imaging unit
Paper feed unit
Fixing unit
High-voltage
transformer PCB