Kyocera KM-4230 Service Manual page 144

The main PCB (MPCB) consists of the main CPU (IC23), the engine CPU (IC66), the
scanner CPU (IC53), communication microcomputers (IC33 and IC56), SRAMs (IC13
and IC55), battery-integrated RAM for back-up (IC15), EPROMs (IC45, IC54, and IC57),
a dual port RAM (IC44), ASICs for input and output control (XIO:IC60 and IC63), ASICs
for controlling image data input (SHD:IC29 and MIP:IC41), an ASIC for controlling
image data output (VTC:IC47)etc.
The main CPU (IC23) controls the engine CPU (IC66) and the scanner CPU (IC53), and
controls the flow of image data transmitted between the MIP (IC41), memory copy PCB
1 (MCPCB1), memory copy PCB 2 (MCPCB2), and the printer board.
The scanner CPU (IC53) controls the SHD (IC29) and the MIP (IC41), and sets the
processing for image signals from the CCD PCB (CCDPCB). Also it controls driving of
the scanner and the SRDF via the scanner motor PCB (SMPCB) and the SRDF DF
driver PCB (DFDPCB).
The engine CPU (IC66) controls the operation of motors, clutches, and solenoids,
output of image data, and communication with optional devices via the engine PCB
(EPCB).
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2-3-5