Laser On/Off Control; Horizontal Scanning Synchronization Control - Canon imageRUNNER ADVANCE C5500 Series Service Manual

Item
List of Controls

Laser ON/OFF Control

Purpose
Turns the laser beam ON and OFF according to the combination of laser control signals.
Execution timing
After turning ON the power
Control description
The DC Controller performs the register setting of the Laser Polygon Control ASIC on the Laser Driver PCB. This Laser Polygon
Control ASIC switches between four modes (Forced OFF mode, APC mode, Print mode, and Standby mode).
DC Controller (UN1)
Main Controller
Mode
Forced OFF mode
APC mode
Print mode
Standby mode
LaserA
LaserB
LaserC
LaserD
Mode
name

Horizontal Scanning Synchronization Control

Purpose
Aligns the write start position in the horizontal scanning direction.
Execution timing
Every line
BD Correction Control
Laser Shutter Control
Image Skew Correction Control
Laser control signal
Video signal
Laser status
OFF
ON
On/Off
OFF
Image formation
Print
ready timing
instruction
PSTBY PINTR
At 1st line (APC)
Standby
APC mode
mode
Description
Laser Driver
PCB
Laser beam
Clears the light intensity setting determined by the APC.
Adjusts laser light intensity.
Emits the laser according to the video signal.
The machine is in standby mode.
PRINT
At 2nd line (APC)
At 3rd line (APC)
At 4th line (APC)
APC mode / Print mode
69
2. Technology
Scanner Motor
Remarks
LSTR PSTBY
Forcible
Standby
mode
OFF mode