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COPYRIGHT
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2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 3 LASER EXPOSURE SYSTEM
3-4 P
2.2 Flow of Sync signals
[1] The BD signal goes ‘0’ when laser light is detected.
[2] The phase is matched with the phase of the printer, and a sync signal is generated.
[3] Based on the printer sync signal, image data is read from the image memory.
[4] Video signal
[5] The 2-pixel parallel signal is converted into a single-pixel serial signal.
[6] The laser drive signal is used to drive the laser unit to suit the video signal.
F03-202-01
E100
Indicates that the BD signal cannot be detected within a specific period of
time after the laser has been turned on.
BD PCB
DC controller
PCB
[1]
J3129 J312
J1015
J316
J316
J307
J500
J1015
GND
GND
5V
[4]
[6]
[3]
1
2
3
4
A18
B14
B13
B12
B11
Laser driver
PCB
Controller assembly
Sync signal
generation
[2]
Memory
control
A18
Parallel/
serial
conversion
[5]