Canon iPF8400S Series, Service Manual

Page: 96 / 312

Chapter 2
2-30
EEPROM control function
This function controls the EEPROMs of individual ink tanks, the maintenance cartridge EEPROM, the EEPROM on the maintenance cartridge relay PCB, and the
head EEPROM in addition to the on-board EEPROM.
Motor control function
This function controls the carriage motor, feed motor, valve motor, purge motor and lift motor based on the input signals from sensors.
b) Driver IC (IC3100)
This IC generates a carriage motor control signal based on the control signal from the ASIC.
c) Driver IC (IC2802)
This IC generates feed motor control signal based on the control signal from the ASIC.
d) Driver IC (IC2900)
This IC generates purge motor and valve motor control signals based on the control signal from the ASIC.
e) Driver IC (IC2902)
This IC generates lift motor control signal based on the control signal from the ASIC.
f) Driver IC (IC2700)
This IC generates solenoid and clutch control signals based on the control signal from the ASIC.
g) DIMMs (IC601/IC602/IC603/IC604)
The DIMM comprising a 128-MB SDR-SDRAM is connected to the 32-bit data bus to be used as a work area.
During print data reception, it is also used as an image buffer.
It cannot be expanded.
h) FLASH ROM (IC701/IC703)
A 128-MB flash ROM is connected to the 8-bit data bus to store the printer control program.
i) EEPROM (IC802)
The 128-KB EEPROM stores various setting values, adjustment values, log data, counter values related to the user/servicing.
j) SO-DIMM
The 256-MB SO-DIMM (J401) is connected to the 32-bit data bus to be used as a work area.
During print data reception, it is also used as an image buffer.
It cannot be expanded.
k) HDD controller (IC1201)
This controller control the hard disk drive.
MEMO:
After replacement of the main controller PCB, the printer must be started up in the service mode to copy over the setting and adjustment values to the new PCB
properly (the service mode will be switched to the PCB replacement mode automatically).