Main Scanning Synchronous Control - Canon iR4570 Series Service Manual

Chapter 6
DC-CON
F-6-5

6.3.1.2 Main Scanning Synchronous Control

0006-5974
iR2270 / iR2870 / iR3570 / iR4570 / iR3530
The synchronous control in the main scanning direction is performed in the synch circuit based on the BD synch
signal.
Using the BD signal generated based on the light from laser A, the DC controller PCB generates the BD synch signal
for laser A and the BD synch signal for laser B.
The image data written to line memory is read out by the readout enable signal (RE_A, RE_B) generated based on
the BD synch signal (BD_A, BD_B) for output to the laser driver PCB.
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