Canon iR6570 series, Service Manual

Page: 204 / 684

Chapter 7
7-6
T-7-4
- The following is the sequence of operation at time of warm-up:
F-7-6
The sequence and particulars of potential control are as follows:
[1] copier potential control: VD = 8 times max.; VL1 = 8 times max.; VL2 = once
[2] printer potential control: VD = 8 times max.; VL1 = 8 times max.; VL2 = once
SERVICE MODE:
COPIER>OPTION>BODY>PO-CNT (enable/disable potential control)
0: disable potential control
1: enable potential control
- The following settings may be made for potential control executed 10 min and 60 min after the main power switch is turned on and when the door is
opened and closed: COPIER>OPTION>BODY>PO-CNTMD:
[1] off (default): disable potential control
[2] short mode: decrease the length based on potential attained by executing either of the 2 modes
[3] standard mode: execute both copier and printer potential control in succession
- Short Mode (as selected in service mode)
The machine executes one of the 2 potential modes, and makes an assumption for the other mode.
For warm-up after power-on, the machine refers to the primary current level, laser output level, and developing bias DC level for both copier potential
control and printer potential control, thereby computing and saving the resulting rate.
In the course of potential control after power-on, the machine executes one of the 2 potential control modes, thus computing the other in relation to the rate
it obtained at time of power-on and after power-on.
The following is the sequence of operation used for short mode:
F-7-7
- Standard Mode (as enabled in service mode)
The machine executes both copier potential control and printer potential control in succession.
10 min and 60 min after the main power switch is turned on
Purpose to control sensitivity, thus making up for changes in drum temperature
to accommodate changes in charging efficiency
Operating conditions - start of the 1st job 10 min and 60 min after the main power
switch has been turned on
- the door is opened and closed
Operation length off: is not executed (default)
short mode: about 5 sec
standard mode: about 10 sec
service mode settings may be OFF, short, or standard as determined by the following:
COPIER>OPTION>BODY>PO-CNTMD
Default OFF
WMUPR WMUP STBY
Fixing assembly temperature 195 C 200 C
Drum motor (M1)
Primary charging
Laser
Potential sensor
Printer potential control [2]
Copier potential control [1]
VD VD VD VL1 VL2 VL1 VD VD VD VL1 VL2 VL1
Sets a constant level for both copier
and printer potential control
Copier
potential
control Printer
potential
control
Fixing assembly temperature
(fixing assembly warm-up complete)
Control panel power switch ON
Start key ON
Potential control
Potential control
Start key ON
10 min later to less
than 60 min
60 min later
Assumes a potential l
evel for the other
based on the result
of copier or printer
potential control
Assumes a potential
level for the other
based on the result
of copier or printer
potential control