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Operating Principles
Laser 1000/1500 Service Manual
Print data and commands transmitted from the host computer via parallel, serial, or optional
interfaces are read using the interrupt process of the CPU and stored in the DRAM input buffer.
The capacity of the input buffer can be specified by
setting. A larger input buffer
improves the throughput.
Data and commands in the input buffer are processed by the CPU, which then stores the printing
bit map data (image data) in the V (video) -RAM (image buffer) in the DRAM. The size of the
V-RAM depends on the available DRAM size, and can be specified using
A page error
occurs when the V-RAM is so
that the
cannot process data faster than it is transmitted to
the engine controller board. If such error occurs, increase the V-RAM using
The CPU transmits image data stored in the V-RAM in a temporary buffer in the SRAM, which is
located in an address space different from the CPU. The temporary buffer has a capacity equivalent
to several lines. This is controlled
the standard cell, which synchronizes and transmits the
temporary buffer’s data to the engine controller board.
CPU
68000
Development
Host
Computer
Host Computer
-
-
Parallel l/F Circuit
Serial l/F
Circuit
DRAM
Control
Circuit
I
Converter
Temporary Buffer
I
,
I
Input Buffer
Page
buffer)
Figure 2-37. Data Flow Diagram
Engine
Controller
Board
2-18
Rev. A
Содержание ActionLaser 1000
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Страница 123: ...Appendix Laser 1000 1500 Service Manual c m 0 L v E Figure A 2 Cable Connections for the Engine Section A 2 Rev ...
Страница 133: ...Laser 100W15OO Service Manual Appendix I I I I 0 o Figure A 4 C82907 ROM B Board Circuit Diagram Rev ...
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Страница 135: ...Laser 100W15OO Service Manual Appendix 10 W Figure A 6 PWB A Board Circuit Diagram Rev A 15 ...
Страница 136: ...Appendix Laser 100LW5OO Service Manual W I u I z z II I em m m m m u Figure A 7 Basic Circuit Diagram u A 16 Rev A ...
Страница 138: ...Appendix Laser Service Manual 0 o 0 o o Figure A 9 C108 MAIN Board Component Layout Back Side Rev A ...
Страница 147: ...Appendix B Service Manual o 0 R m43 Figure B 5 CI08 MAIN B Board Component Layout Back B 10 Rev C ...
Страница 155: ...Service Manual Appendix C 0 ml 10 r 0 0 0 0 0 0 0 0 0 00 Figure C 2 C154 MAIN B Component Layout Front Rev E c 9 ...
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