Canon iPF5000 - imagePROGRAF Color Inkjet Printer, Service Manual

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Chapter 2
2-57
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, spur motor, pump motor, cassette motor, lift motor, cutter motor and cutter lift motor based on
the input signals from sensors.
b) Driver IC (IC3101)
This IC generates a carriage motor control signal based on the control signal from the ASIC.
c) Driver IC (IC2801)
This IC generates feed motor and valve motor control signals based on the control signal from the ASIC.
d) Driver IC (IC2901)
This IC generates pump motor, cutter motor and spur motor control signals based on the control signal from the ASIC.
e) Driver IC (IC3001)
This IC generates a lift motor control signal based on the control signal from the ASIC.
f) Driver IC (IC3901)
This IC generates cutter lift motor and cassette motor control signals based on the control signal from the ASIC.
g) DIMMs (IC301,IC302,IC601,IC602)
The DIMM comprising a 128-MB DDR-SDRAM and a 64-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)
A 16-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.
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).
2.4.2.2 Main controller components
0013-4908
iPF5000
F-2-56
a) ASIC (IC2)
The ASIC with a 16-bit internal bus is driven in sync with the 66 MHz external clock. It supports the following functions:
Image processing unit
This unit converts the RGB multi-value image data or CMYK multi-value data received from the host computer through the interface connector to the binary image
data for the ink colors used.
IC 2
IC 3301
IC 3101
IC 3101
IC 2801
IC 3101
IC 2901
IC 3001
IC 601 IC 602
IC 301
IC 302
IC 701
IC 802