Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 432

COPIER> ADJUST> DENS
P-K-C Adj C color ptch dens convs coeffct k
Lv.2 Details To adjust the cyan patch density conversion coefficient k value of the
Patch Sensor.
The value multiplied by 100 is displayed on the screen.
Use case When the Patch Sensor fails to read the density
Display/adj/set range 0 to 255
Default value 170
P-K-K Adj Bk color ptch dens convs coeffct k
Lv.2 Details To adjust the black patch density conversion coefficient k value of
the Patch Sensor.
The value multiplied by 100 is displayed on the screen.
Use case When the Patch Sensor fails to read the density
Display/adj/set range 0 to 255
Default value 170
HLMT-PTK Toner Dens Sensr(Bk)dens crrct upr limit
Lv.2 Details To adjust the upper limit of the target density (T/D ratio) adjustment
of the Toner Density Sensor (Bk).
Density failures and carrier adherence are alleviated when the upper
limit is smaller, and fogging and scattering are alleviated when it is
larger.
The value is returned to 0 if COPIER> FUNCTION> INSTALL>
INISET-K/-4 is executed upon replacement of the developer.
Use case • When adjusting the toner density (T/D ratio) upon occurrence of
density failures, fogging, carrier adherence, and scattering, etc.
• When analyzing the cause of a problem
Adj/set/operate method 1) Enter the setting value, and then press OK key.
2) Turn OFF/ON the main power switch.
5
Caution • Take necessary action in accordance with the instructions from the
Quality Support Division.
• Do not use the setting value 11.
Display/adj/set range -2 to 2
-2: +2.0%, -1: +1.0%, 0: +/-0%, 1: -1.0%, 2: -2.0%
Default value 0
Related service mode COPIER> FUNCTION> INSTALL> INISET-K/-4
Supplement/memo Toner dropping: A symptom that toner drops from the Developing
Unit
5-204
COPIER> ADJUST> DENS
LLMT-PTK Tonr Dens Sensr(Bk)dens crrct lowr limit
Lv.2 Details To adjust the lower limit of the target density (T/D ratio) adjustment of
the Toner Density Sensor (Bk).
If the lower limit is smaller, the density increase can be prevented in
the case of high duty because QM down of developer is restrained,
but carrier adherence gets worse.
The value is returned to 0 if COPIER> FUNCTION> INSTALL>
INISET-K/-4 is executed upon replacement of the Developing
Assembly.
Use case • When adjusting the toner density (T/D ratio) upon occurrence of
density failures, fogging, carrier adherence, and scattering, etc.
• When analyzing the cause of a problem
Adj/set/operate method 1) Enter the setting value, and then press OK key.
2) Turn OFF/ON the main power switch.
Display/adj/set range -2 to 2
-2: +2.0%, -1: +1.0%, 0: +/-0%, 1: -1.0%, 2: -2.0%
Default value 0
Related service mode COPIER> FUNCTION> INSTALL> INISET-K/-4
REF-K Bk toner dens target VL entry
Lv.2 Details To enter the target value of the Toner Density Sensor (Bk) of ATR
control after RAM clear.
Use case When checking the value before RAM clear and re-enter it after RAM
clear
Display/adj/set range 0 to 255
DMLMT-HY Y toner charging DC voltage upper limit
Lv.2 Details To adjust the offset of the charging DC voltage upper limit for Y in
D-max control.
Use case When a failure occurs due to limiter of D-max control
Adj/set/operate method 1) Enter the setting value, and then press OK key.
2) Execute Auto Adjust Gradation > Quick Adjust.
Caution Do not use this at the normal service.
Display/adj/set range -1500 to 1500
Unit 1 V
Appropriate target value 500 to 1000
Related user mode Adjustment/Maintenance> Adjust Image Quality> Auto Adjust
Gradation > Quick Adjust