Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 577

COPIER> OPTION> IMG-DEV
PCHINT-2 ATR patch ppr interval adj (2nd limit)
Lv.2 Details To adjust the paper interval which patch detection is performed by
ATR control. (2nd limit)
Display/adj/set range 0 to 4
0: 100 sheets, 1: 200 sheets, 2: 300 sheets, 3: 400 sheets, 4: 500
sheets
Default value 1
PCHINT-V Adj ATR patch VD counter total VL intvl
Lv.2 Details To adjust the interval calculated by the total video counter value at
which the patch detection is performed in ATR control and weighting
at high duty.
If any of the average image duty of 4 colors indicates the threshold
value or higher, the patch detection of ATR control is executed at the
paper interval calculated by dividing the total standard value by the
average image duty value.
Patch detection is normally executed at the paper interval per 200
sheets; however, if the foregoing condition is satisfied, detection will
be executed even though it does not reach the specified number of
sheet.
When the negative value is specified, weighting (6.5 times) is applied
to the video counter total value only if a new Toner Container is set
and also in case of high duty (threshold value: 80% or higher). As the
value is incremented by 1, the total standard value of video counter
is increased by 1000%.
When 0 or higher value is specified, weighting is always applied
when the duty value indicates the threshold value or higher.
Combination of threshold value and weighting differs depending on
the setting value. Total standard value of video counter is fixed to
6000%.
Display/adj/set range -10 to 10
-10: Total standard value 10000%, -9: 9000%, -8: 8000%, -7: 7000%,
-6: 6000%, -5: 5000%, -4: 4000%, -3: 3000%, -2: 2000%, -1: 1000%
0: Threshold value 80%, weighting 6.5 times
1: 60%, 6.5 times
2: 40%, 6.5 times
3: 20%, 6.5 times
4: 80%, 8 times
5: 60%, 8 times
6: 40%, 8 times
7: 20%, 8 times
8: 80%, 10 times
9: 60%, 10 times
10: 40%, 10 times
Default value -6
COPIER> OPTION> IMG-DEV
ADJ-VPP Adj of developing AC bias Vpp
Lv.2 Details To adjust Vpp of the developing AC bias.
Ring marks and uneven sleeve pitch are alleviated when the value
is decreased in the - direction, and white spots are alleviated when
the value is increased in the + direction. When the value is set to "0",
Vpp is controlled at low speed according to the life of Developing
Assembly (in the number of sheets). Other than 0 setting, Vpp is
controlled regardless of the life.
Use case When image failures (ring marks, white spots) occur
Adj/set/operate method 1) Enter the setting value (switch negative/positive by -/+ key) and
press OK key.
2) Turn OFF/ON the main power switch.
3) Execute Auto Adjust Gradation > Full Adjust.
Caution When the value is decreased too much in the - direction, density
might be lowered.
Display/adj/set range -4 to 2
-4: 1.3 kV
-3: 1.4 kV
-2: 1.5 kV
-1: 1.6 kV (1/1 speed), 1.3 kV (1/2, 1/3 speed)
0: 1.6 kV (1/1 speed), 1.4 to 1.6 kV (1/2, 1/3 speed, durability control)
1: 1.6 kV (1/1 speed), 1.5 kV (1/2, 1/3 speed)
2: 1.6 kV
Default value 0
DMX-OF-Y Adjustment of Y-color D-max setting
Lv.2 Details Even auto gradation adjustment is executed, the density on a solid
part (Y-color image) might be inappropriate, so use this mode to
adjust the D-max control setting.
When the density is low, increase the value, and when the density is
high, decrease the value.
Use case When the density on the solid part of the image is inappropriate
although auto gradation adjustment is executed
Adj/set/operate method 1) Enter the setting value, and then press OK key.
2) Turn OFF/ON the main power switch.
3) Execute the auto gradation adjustment.
Caution Be sure to execute auto gradation adjustment (full adjustment) after
the setting is done.
Display/adj/set range -3 to 3
Default value 0
5
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