Basic Sequence; Basic Sequence Of Operations (Laser Exposure System); Various Controls; Controlling The Laser Activation Timing - Canon imageRUNNER 7095 Service Manual

6.2 Basic Sequence

6.2.1 Basic Sequence of Operations (laser exposure system)

Image lead edge in page memory
Control panel
power switch ON
Laser scanner motor
Image lead edge signal (PTOP)
Laser A, B, C, D
BD signal (BD)
Laser
Detects laser A, C

6.3 Various Controls

6.3.1 Controlling the Laser Activation Timing

6.3.1.1 Turning On and Off the Laser Unit

The laser unit is turned on or off by the laser driver PCB 1 in response to the laser control signal (CTL0a/
CTL1a/CTL2a/CTL0b/CTL1b/CTL2b) coming from the DC controller PCB.
Video PCB
When the surface temperature of the fixing
roller reaches 198 deg C, full-speed rotation.
(for potential control)
Copy Start key ON
198
INTR PSTBY
Half-speed rotation
Half-speed rotation
Wait activation
Wait activation
Activation for potential control
F-6-2
CNT0a
CNT1a
CNT2a
Laser driver PCB 2
CNT0b
CNT1b
CNT2b
F-6-3
PRINT
Imaging activation
for 1 scan
Laser driver PCB 1
J1301
J1311
Chapter 6
0010-8010
LSTR STBY
Half-speed
rotation
0011-2630
6-3