Canon imageRUNNER ADVANCE C3330 Series, Service Manual

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Control description
Scanner Motor rotation speed is controlled by the Y/M Laser Driver PCB.
1. The Y/M Laser Driver PCB outputs Scanner Motor control signals (acceleration signal: ACC, deceleration signal: DEC) to
the Scanner Motor to rotate the Polygon Mirror.
2. The Y/M Laser Driver PCB controls the Scanner Motor rotation speed to be constant by reference to the Scanner Motor
rotation speed signal (FG signal).
(From when the Scanner Motor starts rotation until it reaches the target revolutions and the machine starts image formation
process)
3. When the laser beams are emitted at image formation, the BD Sensor of the C/Bk Laser Driver PCB detects the BD signal
and inputs it to the Y/M Laser Driver PCB.
4. The Y/M Laser Driver PCB controls the Scanner Motor control signals (acceleration signal: ACC, deceleration signal: DEC)
based on the input timing of the BD signal to control the Scanner Motor rotation speed.
Y Laser
M Laser
C Laser
Bk Laser
BD
ACC
DEC
FG
BD Sensor
Scanner
Monitor
C/Bk Laser
Driver PCB
(UN09)
Y/Mk Laser
Driver PCB
(UN08)
ASIC
Related Error Code
• E100-0001: BD error
• E110-0001: Scanner Motor error
• E110-0002: Scanner Motor error
• E110-0003: Scanner Motor error
• E110-0004: Scanner Motor error
■ APC(Auto Power Control) control
Purpose
Ensures constant laser beam light intensity for each line.
Execution Timing
For each line (before writing the image)
Control description
1. The Y/M Laser Driver PCB outputs the APC signal to the Laser Driver IC on each Laser Driver PCB.
2. Technology
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