Canon 7086 Series Service Manual - page 250
Chapter 7
7-4
F-7-4
7.4.2 Basics Sequence of Operations
0010-8040
iR7105 / iR7095 / iR7086
The following shows the basic sequence of operations and timing of operations associated with the machine's control system:
F-7-5
Primary charging wire
Potential control
Grid wire
Laser light
Developing cylinder
DC controller PCB
Laser driver PCB
High-voltage DC PCB
Potential controller PCB
Control signal
DC bias
DC bias
DC bias
Control signal
Detection control
J502A
J3
1
2
3
4
8
9
10
11
0 V
24 VU
POTENTIAL_SIG
POTENTIAL_ON
Drum surface potential measurement value
When '1', potential sensor goes on
WMUPR
WMUP
STBY
193
198
Drum motor(M0)
Primary charging bias(DC)
Developing bias(AC)
Developing bias(DC)
Grid bias
Laser
Potential stabilization sequence
Potential control
Potential control for
transparency mode
Optimum grid
bias determined
Optimum laser
output determined
Optimum laser
output determined
Fixed value
Performs a series of charging operations to stabilize the drum potential.
Uses the potential control mechanism that is used
when the main power switch is turned on.