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Timing chart for image density control (Dmax & Dhalf)
Density detection control
sequence command
Sequence
Dmax & Dhalf initial rotation
1
2
ITB home position signal
3
Fixing motor (M2)
4
Drum Motor (M3)
5
Toner cartridge motor (M4)
6
Developing rotary motor (M5)
7
Primary charging bias (AC)
8
Primary charging bias (DC)
9
Developing bias (AC)
10
Developing bias (DC)
11
12
ITB unit contact clutch (CL2)
13
Toner level sensor
14
Scanner motor
15
Laser drive
16
17
18
Note: During Dmax & Dhalf control, the DC controller ignores the ITB home position signal and controls with the DC controller internal signal (Dummy TOP signal).
2.49
Reference TOP signal
7.50
3.75
HP1
HP2
0.05
0.2
0.75
0.2
0.42
0.24
2.58
1.1
2.25
WAIT
Dmax
Dummy TOP signal output (Note)
3.75
3.75
7.50
HP3
HP4
HP5
0.75
2.0
3.25
0.2
1.31
2.56
0.06
0.42
1.53
2.78
6.19
2.35
4.94
7.44
1.1
3.6
6.24
2.01
4.99
7.49
0.76
3.26
5.95
4.94
5.95
2.74
4.94
Dhalf
3.75
3.75
3.75
3.75
HP6
HP7
HP8
HP9
0.75
0.75
0.75
0.75
0.2
0.2
0.2
0.42
0.42
0.42
0.42
3.7
3.7
3.7
3.7
1.1
1.1
1.1
1.1
3.86
3.86
3.86
3.86
1.1
1.1
1.1
1.1
2.25
2.74
2.74
2.74
(Unit: second)
Dmax & Dhalf last rotation
2.96
TB position adjustment
3.75
3.75
HP10
HP11
HP12
2.86
2.36
0.2
0.42
1.14
2.41
Secondary transfer
2.42
1.68
roller contact
1.92
1.76
ITB unit contact
A - 21
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