Canon MultiPASS C5000 Service Manual page 96

Part 1: Facsimile
d) Printer control section (On the PCNT board)
d-l) Printer controller (IC 5)
The main functions of the printer controller are as follows:
Bi-ccntronics interface
l
EEP-ROM control
l
DRAM control
l
Buffer control
l
Print head control
l
d-2) MPU (IC 1)
CPU
16 bit
l
24 bit address bus
l
16 bit data bus
l
Carriage motor I Line feed motor control
l
The stepping motor controller outputs the carriage motor's single- and two-phase exciter
drive signal, and paper feed motor's two-phase drive signal.
The stepping motor controller switches the carriage motor with the S-step peak current
value for optimum driving. The stepping motor controller outputs the switching control
signal to the carriage motor driver.
Detection of BJ head temperature
l
Detection of printer's internal temperature.
l
Detection of Home position sensor, Paper edge sensor and Pickup roller sensor.
l
Cartridge detectinn.
l
Ink detection sensor control
l
d-3) ROM (IC
The 8 Mbit control/CC ROhl cnntains the program and bitmap font data for printer
d-4) DRAM (IC 4)
d-5) EEPROM (IC 8)
Controlled by the printer wntn~llrr, thr 1 Kbit ERPROM iElectrically Erasable and
Programmable ROM) stores vnri"us printer ewluli~tion wttings, and the waste ink amount
discharged to the waste ink absorber.
3)
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