Controlling Synchronization In Main Scanning Direction; Controlling Synchronization In Sub Scanning Direction - Canon iR C3200 Series Service Manual

Chapter 8

8.3.1.3 Controlling Synchronization in Main Scanning Direction

The control of synchronization in main scanning direction is based on the BD signal.
Video signals are
generated in keeping
with the sync signals.

8.3.1.4 Controlling Synchronization in Sub Scanning Direction

- The synchronization in sub scanning direction is controlled with reference to the PTOP signal (image formation
start signal).
- When the mechanism becomes ready for image formation, the PTOP signal (image formation start signal) is
generated, turning on the individual lasers based on the signal.
8-8
BD detection PCB
Clock signals/
sync signals
DC controller PCB
based on the
BD signal are
generated.
PWMIC
The BD signal is separated
into 2 channels for laser A
and laser B.
J115
A/B
separation
A
B
FIFO
Image signal for laser A
Image signal for laser B
F-8-8
0000-4458
0000-4459