Canon imageRUNNER ADVANCE C5500 Series, Service Manual, Page: 959 / 1331

■ IMG-RDR
COPIER > OPTION > IMG-RDR
DFDST-L1 1 ON/OFF dust detection: ppr intvl, front
Detail To set whether the Scanner Unit (for front side) performs dust detection at paper interval.
Set one of 1 to 255 when black lines appear. Dust detection is performed at paper interval, and
then dust detection correction control is performed as needed.
Set 0 if a fine image portion is unclear as a result of dust detection correction.
Use Case Upon user's request
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 0 to 255
0: OFF, 1 to 255: ON
Default Value 200
Supplement/Memo Black lines may appear on the image if there is dust. With dust detection correction control, the
image is corrected to prevent black lines once dust is detected.
DFDST-L2 1 Adj dust detect level: 1st stream, front
Detail To adjust dust detection level with dust detection correction control that is executed by the Scanner
Unit (for front side) at the first stream reading after power-on.
Decrease the value in the case of frequent display of cleaning instruction at the time of dust
detection. As the value is smaller, dust is less likely to be detected. When 0 is set, the cleaning
instruction is not displayed.
Increase the value when black lines appear. As the value is larger, the small dust is more likely to
be detected.
Use Case
Upon user's request
Adj/Set/Operate Method
1) Enter the setting value, and then press OK key.
2) Turn OFF/ON the main power switch.
Caution
If the value is too small, black lines may appear on the image.
Display/Adj/Set Range
0 to 255
0: OFF
Default Value 200
Supplement/Memo Black lines may appear on the image if there is dust. With the dust detection correction control that
is executed after power-on, reading position is adjusted to minimize dust to be detected.
DF2DSTL1 1 ON/OFF dust detection: ppr intvl, back
Detail To set whether the Scanner Unit (for back side) performs dust detection at paper interval.
Set one of 1 to 255 when black lines appear. Dust detection is performed at paper interval, and
then dust detection correction control is performed as needed.
Set 0 if a fine image portion is unclear as a result of dust detection correction.
Use Case Upon user's request
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 0 to 255
0: OFF, 1 to 255: ON
Default Value 200
Supplement/Memo Black lines may appear on the image if there is dust. With dust detection correction control, the
image is corrected to prevent black lines once dust is detected.
8. Service Mode
945