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Chapter 2
2-40
Operation panel control function
This function controls serial communication with the operation panel.
PWM control function
This function controls driving of the suction fan and mist fan as well as the temperature of the printhead.
Remaining ink level detection function
This function detects the remaining level of each color of ink based on the signal received from the hollow
needle mounted in the ink tank unit.
LED control function
This function controls the LEDs on the ink tank unit.
I/O port function
This function controls input signals from sensors.
Power ON/OFF control function
This function controls turning on/off of the drive power (26 V and 21.5 V) supplied from the power supply PCB.
Head DI sensor read control function
This function controls read operation by the head DI sensor.
Multi sensor control function
This function controls the LED, adjusts the gain, and controls obtainment of the reading for the multi sensor.
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, lift motor and purge 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 a lift motor control signal based on the control signal from the ASIC.
f) DIMMs (IC301,IC302,IC601,IC602,IC603,IC604)
The DIMM comprising a 128-MB DDR-SDRAM and 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.
g) FLASH ROM (IC701)
A 16-MB flash ROM is connected to the 8-bit data bus to store the printer control program.
h) EEPROM (IC802)
The 128-KB EEPROM stores various setting values, adjustment values, log data, counter values related to the
user/servicing.
MEMO:
After replacement of the main controller PCB, the printer must be started up in the service mode to take over
the setting and adjustment values to the new PCB properly (the service mode will be switched to the PCB
replacement mode automatically).