Canon CLBR 460ps Service Manual page 358

Timing chart for image density control (Dhalf)
Density detection control
sequence command
Sequence
1 ITB home position signal
2
Fixing motor (M2)
3
Drum Motor (M3)
4
Toner cartridge motor (M4)
5
Developing rotary motor (M5)
6
Primary charging bias (AC)
7 Primary charging bias (DC)
8
Developing bias (AC)
9 Developing bias (DC)
10
11
ITB unit contact clutch (CL2)
12
Toner level sensor
13
Scanner motor
14
Laser drive
15
16
17
A - 22
Dmax & Dhalf initial rotation
2.49 7.50
HP1
0.05
0.2
0.24
WAIT
Dhalf
3.75 3.75 3.75
HP2 HP3 HP4
0.75
0.75 0.75
0.2 0.2 0.2
0.42 0.42 0.42
3.7 3.7
1.1 1.1 1.1
3.86
3.86
1.1 1.1 1.1
2.25 2.74 2.74
HP5 HP6
0.75
0.2 0.2
0.42
1.14
2.41
3.7 3.7
1.1
3.86
3.86
1.1
2.42
1.92
2.74
(Unit: second)
Dhalf last rotation
2.96
HP7 HP8
2.86
2.36
0.42
1.68
1.76
ITB unit contact