Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 529

COPIER> FUNCTION> MISC-R
BWDF2-EN B&W back stream read MTF VL initial set
Lv.1 Details To return the MTF value for B&W back side stream reading to the
factory setting value.
Since overwriting is performed with the backup data retained in the
Reader Controller PCB, the MTF value obtained by sampling of the
MTF chart becomes disabled.
When BWM-DF2 is executed, the value is automatically set to 1.
When the value is set to 0, the value adjusted with BWM-DF2
becomes disabled and returned to the factory setting value.
Use case When returning the MTF value to the initial setting value upon user's
request in case that a sufficient quality level cannot be obtained on
the back side of a B&W image even performing a fine adjustment
with BWM-TGT after adjusting the MTF value with BWM-DF2.
Adj/set/operate method Select the item, and then press OK key.
Caution The MTF value obtained by reading the MTF chart becomes
disabled.
Display/adj/set range 0 to 1
0: Factory setting value, 1: Adjustment value at installation
Default value 0
Related service mode COPIER> FUNCTION> MISC-R> BWM-DF2, BWM-TGT
COPIER> ADJUST> CCD> MTF-M1 to 12, MTF-S1 to 12
CLM-TGT Fine adjustment of color MTF value
Lv.1 Details To perform the filter processing inside of the Reader Controller so
that the MTF value measured by CLM-PLTN/CLM-DF1/CLM-DF2
becomes 55% or lower of the value.
When 1 is specified, the MTF correction filter is calculated again,
and the MTF value becomes 50% or lower of the value (the image
becomes foggy). The backed up MTF filter correction coefficient is
updated.
Use case When decreasing the MTF value (to make the image foggy) upon
user's request (moire, incorrect judgment)
Adj/set/operate method Enter the setting value, and then press OK key.
Display/adj/set range 0 to 1
0: 55%
1: 50% (The image becomes foggy.)
Default value 0
Required time Approx. 2 minutes
Supplement/memo The MTF value is set to 65% at the time of shipment.
COPIER> FUNCTION> MISC-R
BWM-TGT Fine adjustment of B&W MTF value
Lv.1 Details To perform the filter processing inside of the Reader Controller so
that the MTF value measured by BWM-PLTN/BWM-DF1/BWM-DF2
becomes 55% or lower of the value.
When 1 is specified, the MTF correction filter is calculated again,
and the MTF value becomes 50% or lower of the value (the image
becomes foggy). The backed up MTF filter correction coefficient is
updated.
Use case When decreasing the MTF value (to make the image foggy) upon
user's request (moire, incorrect judgment)
Adj/set/operate method Enter the setting value, and then press OK key.
Display/adj/set range 0 to 1
0: 55%
1: 50% (The image becomes foggy.)
Default value 0
Required time Approx. 2 minutes
Supplement/memo The MTF value is set to 65% at the time of shipment.
SCANLMP2 Light-up check of LED Lamp Unit: back
Lv.1 Details To light up the LED Lamp Unit for back side, which is placed in the
ADF, and check whether there is a missing block or no lighting in
LED.
Use case When replacing the LED Lamp Unit for back side
Adj/set/operate method Select the item, and then press OK key.
Display/adj/set range During operation: ACTIVE, When operation finished normally: OK!
Required time Approx. 5 seconds
RD-SHPOS Shift to fixed pstn of Reader Scan Unit
Lv.2 Details Scanner Unit on the Reader side is shifted to the fixed position
before moving the machine.
If the machine is moved after Reader is installed, the Scanner Unit
moves and it might cause damage. The damage is prevented by
tightening the screws after the Scanner Unit is shifted to the specific
position before the machine is moved.
Use case When the machine is moved after Reader is installed
Adj/set/operate method Select the item, and then press OK key.
Caution When the machine is moved after Reader is installed, be sure to shift
the Scanner Unit to the specific position to be fixed and then tighten
the screws. If the Scanner Unit is not fixed, it might cause damage
when the machine is moved.
Display/adj/set range During operation: ACTIVE, When operation finished normally: OK!
Required time a few seconds
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