Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 515

■ DPC
COPIER> FUNCTION> DPC
DPC Execution of potential control
Lv.1 Details To execute potential control for the Photosensitive Drum manually. (It
is usually executed automatically.)
When this item is executed, the same condition is set for
development of plain paper and coated paper.
Use case When checking potential control operation
Adj/set/operate method Select the item, and then press OK key.
Caution Since the same condition is set for development of plain paper and
coated paper groups, be sure to execute D-max control for both
groups after execution of this item.
Required time Approx. 30 seconds
OFST Potential adjustment of Potential Sensor
Lv.1 Details To adjust the detection potential offset value of the Potential Sensor
automatically.
Use case • When replacing the Photosensitive Sensor
• At diagnosis for a failure of the Photosensitive Sensor
Adj/set/operate method Select the item, and then press OK key.
Caution An error is displayed when disconnection/connection failure/
installation failure occurs to the Potential Sensor at the time of
replacement. In this case, manually set the value to 0 by EPOTOFST
and then make an adjustment.
Required time Approx. 4 seconds
Related service mode COPIER> ADJUST> V-CONT> EPOTOFST
DRM-RSET Exe of all color Drums replacement mode
Lv.1 Details When replacement of Drum Unit is completed within 30 minutes,
warm-up rotation may not be executed at power-off/on because of
high fixing temperature. In such cases, drum potential becomes
unstable, causing an image failure to occur. To prevent this symptom,
this item forcibly executes the same operation as warm-up rotation.
At this time, laser power values, etc., that were corrected according
to drum counter for all colors, total charging time, target Vd values
for potential control and drum durability are reset.
Use case When replacing the Drum Units for all colors
Adj/set/operate method 1) Enter the setting value, and then press OK key.
2) Turn OFF/ON the main power switch.
When the drum replacement mode is enabled, it becomes disabled
automatically after execution.
Caution Be sure to execute this item after replacement of the Drum Units for
all colors.
Display/adj/set range 0 to 1
0: Disabled (Not executed), 1: Enabled (Executed)
Required time Approx. 2 minutes
Related service mode COPIER> FUNCTION> DPC> DRMRSETY, DRMRSETM,
DRMRSETC, DRMRSETK
COPIER> FUNCTION> DPC
DRMRSETY Forcible exe of Y Drum replacement mode
Lv.1 Details When replacement of Drum Unit is completed within 30 minutes,
warm-up rotation may not be executed at power-off/on because of
high fixing temperature. In such cases, drum potential becomes
unstable, causing an image failure to occur. To prevent this symptom,
this item forcibly executes the same operation as warm-up rotation.
At this time, laser power values, etc., that were corrected according
to Y drum counter, total charging time, target Vd values for potential
control and drum durability are reset.
Use case • When detection of the Drum Unit replacement has failed
• When the Drum Unit used in other machine for a while is used as
a dummy unit
Adj/set/operate method 1) Enter the setting value, and then press OK key.
2) Turn OFF/ON the main power switch.
When the drum replacement mode is enabled, it becomes disabled
automatically after execution.
Caution Use a Drum Unit that is not close to the end of life as a dummy unit.
When using a Drum Unit that is close to the end of life, it affects the
life of developer, etc.
Display/adj/set range 0 to 1
0: Disabled (Not executed), 1: Enabled (Executed)
Required time Approx. 2 minutes
Related service mode COPIER> FUNCTION> DPC> DRM-RSET, DRMRSETM,
DRMRSETC, DRMRSETK
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