Canon IMAGERUNNER 7086, Service Manual

Page: 182 / 615

Chapter 7
7-5
7.4.2 Basics Sequence of Operations
0010-8040
The following shows the basic sequence of operations and timing of operations associated with the ma-
chine's control system:
F-7-5
F-7-6
SERVICE MODE:
- COPIER> OPTION> BODY> PO-CNT
(enabling/disabling potential control)
0: potential control OFF
1: potential control ON (default)
-
COPIER> ADJUST> V-CONT> EPOTOFST (potential sensor offset value input)
If the DC controller PCB has been replaced or the RAM on the DC controller PCB has been initialized,
enter the value indicated on the service label.
- COPIER> ADJUST> V-CONT> VL-OFST (VL target potential offset value input)
If the DC controller PCB has been replaced or the RAM on the DC controller PCB has been initialized,
enter the value indicated on the service label.
- COPIER> ADJUST> V-CONT> VD-OFST (VD target potential offset value input)
If the DC controller PCB has been replaced or the RAM on the DC controller has been initialized, enter
the value indicated on the service label.
- COPIER> FUNCTION> DPC> OFST (potential sensor offset adjustment)
This mode item is part of the series of procedures that must be performed when the potential sensor unit
is replaced. It is not performed on its own.
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.
60 min later
Potential
control
Potential
control
Potential
control
Potential control
for transparency
Main power
switch ON
Fixing assembly temperature
(end of fixing assembly warm-up)
[1] The control panel power switch is turned on.
[2] The front door is opened/closed.
Start key ON
Start key ON
10 min later
1 hr later
Starting when the fixing assembly temperature reaches 193 deg C,
executes potential control every 10 min and 60 min.
After previous potential control,
executes potential control every hour.
Potential
control