Canon iR6570 series, Portable Manual

Page: 38 / 320

Chapter 2
2-4
F-2-3
2.1.3 Making Checks on the Printer Unit (2/2)
0008-7911
iR5570 / iR6570
Is it foggy?
Are the readings ± 6 V
of the target value?
(*1)
<Checking fro Fogging>
YES
NO
NO
YES
NO
YES
Generate a blank print.
Check the following readings (VL1 target value) in service mode:
COPIER>DISPLAY>DPOT>VL1M (for copier image)
COPIER>DISPLAY>DPOT>VL1M-P (for printer image)
Check the following readings (VD target value) in service mode:
COPIER>DISPLAY>DPOT>VDM (for copier image)
COPIER>DISPLAY>DPOT>VDM-P (for printer image)
B
Check the following, and replace them if
necessary:
1. Laser (for output)
2. Potential control system
3. Photosensitive drum
Check the primary charging
system and the potential control
system; if normal, replace the
photosensitive drum.
-50 -40 -30 -20 -10 0 +10 +20 +30 +40 +50
Default
Lighter image Darker image
Adjusting the Offset of the VL Target Potential
(DE-OFFSET/DE-OFFSET-P)
Vary the value using the following as a guide:
COPIER>ADJUST>V-CONT>DE-OFST (for copier image)
COPIER>ADJUST>V-CONT>DE-OFST-P (for printer image)
Are the readings ± 6 V
of the target value?
(*2)
A