Chapter 2
2-2
F-2-2
a) The printer driver in the host PC compresses the image data, and then sends the command data and other print data to the printer.The resolution
conversion, color conversion process, and six-color binary conversion process for the image data are not performed.The image process table data is
used in the color conversion process, binary conversion process, and other operations of the image data to achieve a high-quality image output. This
data is created and sent as command data based on the Paper Type setting specified in the printer driver.
a') An optional software RIP performs resolution conversion of the image and then sends this image data to the printer together with the command data
after a color conversion process or six-color binary conversion is performed.
b) This printer receives the print data from each interface of the system controller. The received print data is sent to the ASIC.
c) The system controller expands the print data that was sent to the ASIC, and then performs resolution conversion, color conversion process, and six-color
binary conversion while timely storing the data in DDR-SDRAM.
d) The ASIC in the system controller converts the print data to six-color binary image data and command data and sends the data to the ASIC in the engine
controller.
e) The ASIC in the engine controller stores the received image data in the SDRAM at the optimal timing, and the data is combined with the mask data in
the ASIC and output in coordination with the discharge timing. The ASIC also sends the command data from the system controller to the CPU.
f) The CPU in the engine controller obtains the mask pattern data from the FLASH ROM based on the command data, printhead information from the
EEPROM in the printhead, and internal temperature from the latch IC on the head relay PCB, and sends this data to the ASIC.
g) The ASIC in the engine controller sends the image data combined with the mask pattern to the printhead as print signals while converting to data
corresponding to the printhead information and internal temperature. During this operation, heat pulses are sent to the printhead for performing the
optimal head driving.
g') The print signal is sent to the driver and received by the receiver.
h) The printhead convert the received print signals internally, which are in serial format, into the parallel data used by a single nozzle array, and then
perform heat pulse and AND processing to carry out the printing.
i) The CPU in the engine controller manages the overall print drive operations while monitoring the status of the printer components based on the
Host computer
Printer driver
Optional software
RIP etc.
Syetem
controller
Print head
Carriage relay PCB
Ink tank
Engine
controller
a
a
a'
USB
b
b
ASIC
CPU
j
EEPROM
FLASH ROM
EEPROM
g
h
d d
SDRAM
FLASH ROM
CPU
EEPRROM
ASIC
EEPROM
e
SDRAM
SDRAM
e
g
g'
e, f
f
i
f
f
i
Motor driver PCB
i
i
i
DDR-SDRAM
a'
g
Driver IC
Image processing
unit
c, j
c, j
c, j
:
:
:
:
:
:
:
Image data
Mask pattern data
Heat pulse
Command data
PCI bus
Data bus
Interface unit
Head relay PCB
Latch IC
Universal sirial bus
Expansion
Operation
panel
Receiver
Driver
Sensor and driver unit
Summary of Contents for WS8400
Page 1: ...Apr 5 2005 Service Manual W8400 Series W8400...
Page 2: ......
Page 6: ......
Page 12: ...Contents...
Page 13: ...Chapter 1 PRODUCT DESCRIPTION...
Page 14: ......
Page 16: ......
Page 21: ...Chapter 1 1 5 F 1 9...
Page 47: ...Chapter 2 TECHNICAL REFERENCE...
Page 48: ......
Page 91: ...Chapter 3 INSTALLATION...
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Page 97: ...Chapter 4 DISASSEMBLY REASSEMBLY...
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Page 139: ...Chapter 5 MAINTENANCE...
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Page 147: ...Chapter 6 TROUBLESHOOTING...
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Page 193: ...Chapter 6 6 43 F 6 8 Cover switch tool Cover switch tool...
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Page 195: ...Chapter 7 SERVICE MODE...
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Page 213: ...Chapter 8 ERROR CODE...
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Page 223: ...Apr 5 2005...
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