Print Signal Sequence - Canon iPF710 Service Manual

Chapter 2

2.1.2 Print Signal Sequence

The signal sequence from when the printer receives the print signals until printing starts is shown in Figure.
Host computer
Printer driver
Interface unit
Expansion
EEPROM
DDR-SDRAM
SDR-SDRAM
FLASH ROM
i
Main controller
a) The printer driver on the host computer transmits print data, including command data, to the printer after
compressing the image data, without resolution, color and 12-color binarization conversion.
To achieve high-quality image output, the image processing table data used for image data color conversion and
binarization conversion are generated as command data to meet the Media Type and other specifications of the
printer driver.
b) This printer receives print data from the individual interfaces on the main controller, transmitting the received
print data to ASIC (IC1).
2-2
a a
USB LAN
b
b
i
ASIC (IC1/L-COA)
Image processing
c
unit
d
e
e,h
e
e
h
ASIC (IC2)
i
i
:
Image data
:
Mask pattern data
:
Heat pulse
:
Command data
:
PCI bus
: Data bus
:
b
g
f
f
EEPROM
Operation panel
Sensor and drive unit
F-2-2
Universal sirial bus
Printhead
EEPROM
Carriage PCB
Latch IC
Ink tank
0017-4696