Canon imageRUNNER 2535, Service Manual, Page: 56 / 362

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Technology > Laser Exposure System > Basic Sequence > Basic Sequence
Technology > Laser Exposure System > Basic Sequence > Basic Sequence
Basic Sequence
■ Basic Sequence
Initial rotation INTR):After the control panel key is ON, the machine starts the scanner motor
and rotates the laser scanner motor until it reaches the number of target rotation while
keepingall laser OFF. Once it reaches the target, the machine enters stand-by mode. (FG
control)
If pressing the start key before the control panel key is ON*, standby time gets shorter after
the scanner motor reaches the target.Print (PRINT)]
When copy start key is ON, the machine drives A laser. After BD PCB detects A laser,
the machine performs the APC (laser intensity) control of each laser. Oncethe BD signal
reaches the specified cycle, the machine is ready to print. Image data is output from the main
controller based on the synchronous signal and laser isemitted corresponding to it.
<In the case of A4, 1 sheet>
PRINT STBY STBY INTR
Laser scanner
motor
PVREQ signal
Laser
Control panel key ON
(Start key ON 1 )
Start key ON
Laser A
Image per 1 line
Waiting in FG control
BD control
Light on
Light off Light off Light off
Speed down
1: BD signal is generated based on A laser light. Only A laser light reaches BD sensor
on BD PCB and B/C/D laser does not reach.
Laser B
Laser C
Laser D
BD 1
Laser A
Laser B
Laser C
Laser D
: BD detection/APC control
: AP control
BD 1
Speed up
F-2-50