Canon LBP-1260, Руководство по обслуживанию

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2
C. Video Controller PCB
1. outline
The Controller PCB receives print data via
the serial or parallel ports. The controller
processes and converts the print data into
dot data. The dot data is sent to the DC
controller PCB to control the laser diode
emission. Figure 2-44 shows the layout of
main
on the Controller PCB, and
Figure 2-45 is a block diagram.
2. Functions
of
blocks
a. CPU
The CPU is an Intel 80960KB
embedded
processor a 512
byte on-chip instruction cache. The
CPU runs at 20 MHz. The CPU controls
the Controller according to instructions
contained in the ROM.
J3
Figure 2-44