Generating The Bd Signal - Canon CLC 1120 Service Manual

II.

GENERATING THE BD SIGNAL

The BD signal is used to enable synchronization in main scanning direction, and it is generated
by the BD PCB based on the laser beam reflected by the BD mirror found in the optical path.
The BD signal is used to send video signals from the image processor PCB to the laser
controller PCB. The laser controller PCB is designed to correct video signals, and the laser driver
PCB is used to send out video signals as laser intensity control signals in sequence.
Laser
controller
PCB
RBD
Video signal
Image processor PCB
Related Error Code
E100
The BD signal is not detected within a specific period of time.
COPYRIGHT © 1999 CANON INC.
Video signal
Laser driver
PCB
BD
BD PCB
Figure 5-201
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5 LASER EXPOSURE SYSTEM
8-facet mirror
Laser unit
BD mirror
(front)
Photosensitive
drum
ON
Laser
OFF
Non-image
area
BD signal
Guiding mirror
(rear)
Image area
(301 mm)
5-3