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Canon MultiPASS C5000 Service Manual Page 94

Canon multipass c5000 inkjet printer.
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Part
6.2 Circuit Board Components
a) System control section
The system controller is made up of the following components, and controls tbc entire fax
a-l) MPU (Micro Processor Unit) (IC 201)
The main functions of lbe NIX' pPD7043:3GJ-16.3EB MPU are as follows
16 bit CPU
l
24 bit address bus
l
8 bit data bus
l
DMA control
l
Am converter
l
Serial intcrfacc
l
Software CODEC
l
Interrupt control unit
l
a-2) System controller (IC 401)
The system controller is a gate array for controlling MPIJ peripheral devices. The main
functions of the system controller are as fullows:
Printer resolution conversion (Ultra-smoothing)
l
This IC converts facsimile data of horizontal rrsolution of 8 dots/mm and vertical
resolution of 3.86 or 7.7 lines/mm to print data of 360 dpi and 360 dpi, respectively.
BJ printer interface
l
O P C N T scrinl interface (Contams document sensor and drxumcnt edge scnsm signals)
l
. DRAIWSRAM controller
Controls DRAM/SRAM rcadhrritc and renewal.
l
l
Dctcction of document edgr FPIX~L' and ink detwtion SE~SOL
l
a-3) RTC (Real Time Clock) IC (IC 203)
t h e dntr nnd lime.
2-26

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