Canon iR C6800 Series Service Manual page 1289

15.8.1.5.9 <DRM PHAS>
Remarks
15.8.1.6 PRDC 1
15.8.1.6.1 Overview
The counter readings used in service mode are grouped into the following 5 types:
Type 1: black and white S size: count by 1 full color S size: count by 4
L size: count by 2
Type 2: black and white S size: count by 1 full color S size: count by 3
L size: count by 2
Type 3: black and white S size: count by 1 full color S size: count by 1
L size: count by 2
Type 4: black and white/ full color count by 1
Type 5: black and white no count
All the values of the items under COPIER>COUNTER>PRDC 1 are retained by the main controller PCB.
15.8.1.6.2 <PRM WIRE>
for the primary charging wire, indicates the number of times high voltage has gone on.
Estimated life: 500,000 image
count type: type 1
15.8.1.6.3 <PRM GRID>
for the grid plate, indicates the number of times high voltage has gone on.
Estimated life: 500,000 image
count type: type 1
Use it when shifting the photosensitive drum phase.
When the photosensitive drum is used without changing the home position in relation to the drum axis,
uneven density at drum intervals or lines can occur in output images.
To limit the symptom, shift the phase of the photosensitive drum by 90 deg every specific number of
prints. The machine does not shift the phase on its own, and requires the work of the service person.
The machine indicates a message to prompt the work on the User and Service Mode screens.
Use this mode item to obtain an idea of how much the photosensitive drum has been used so that the
work cycle may be predicted.
When the service mode item used in shifting the drum phase is executed
(i.e., COPIER>FUNCTION>MISC P>DR P ADJ), the counter reading will automatically be reset.
to change the timing at which the message is indicated (COPIER>FUNCTION>MISC P>DR P ADJ),
change the denominator of the setting. By default, the denominator is 200,000 images (Japan) or
100,000 images (outside Japan).
L size: count by 6
L size: count by 2
full color count by 1
T-15-455
L size: count by 8
Chapter 15
0006-1497
0005-7253
0005-6915
0005-6932
15-225