Basic Sequence - Canon iR3245 Series Service Manual

6.2 Basic Sequence

6.2.1 Basic Sequence
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
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 keeping
all 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. Once
the 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 is
emitted corresponding to it.
In the case of A4, 1 sheet
Laser scanner
motor
PVREQ signal
Laser
BD 1
Laser A
Laser B
Laser C
Laser D
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.
Control panel key ON
(Start key ON 1 )
Start key ON
STBY INTR
Waiting in FG control
Speed up
Light off Light off
BD 1
Laser A
Laser B
Laser C
Laser D
PRINT STBY
Speed down
BD control
Light on Light off
: BD detection/APC control
: AP control
F-6-3
Chapter 6
Image per 1 line
0019-4283
6-3