Canon imageRUNNER 1750 Series Service Manual page 279

● #SCAN> READER> FUNCTION> CCD> CCD-ADJ
Gain adjustment of analog processor block (on CCD PCB).
The gain of LED of CIS is corrected to set the CIS parameter automatically. (AGC adjustment)
Execute this after replacing the CIS unit.
● #SCAN> READER> FUNCTION> CCD> DF-WLVL1
ADF white level adjustment (platen board cover scan/stream reading scan).
● #SCAN> READER> FUNCTION> CCD> DF-WLVL2
ADF white level adjustment (platen board cover scan/stream reading scan).
1) Place a paper that users normally use on the copyboard glass and execute the following
item; SCAN > READER > FUNCTION > CCD > DFWLVL1/ DF-WLVL2
: Read the white level in BOOK mode. (Check the transparency of the glass for BOOK mode.)
2) Set a paper that users normally use and execute the following item;
SCAN > READER > FUNCTION > CCD > DFWLVL1/ DF-WLVL2
: Read the white level in DF mode (stream reading). (Check the transparency of the glass for
stream reading.) (Read the both sides of chart.) Reading the face: Calculate DFTAR-R
NOTE:
Be sure to execute these two items (DF-WLVL1/DF-WLVL2) simultaneously.
● #SCAN> READER> FUNCTION> CCD> DF-WLVL3
ADF white level adjustment (platen board cover scan).
NOTE:
Scan a blank sheet on the platen and adjust the white level.
● #SCAN> READER> FUNCTION> CCD> DF-WLVL4
ADF white level adjustment (DF scan).
NOTE:
Scan a blank sheet in stream reading mode and adjust the white level.
● #SCAN> READER> FUNCTION> CLEAR> R-CON
Clearing of the backup area for the reader in the main controller.
Clear the backup area for the reader in the main controller.
8
Service Mode > Details of Service Mode > #SCAN > READER
8 Service Mode > Details of Service Mode > #SCAN > READER
● #SCAN> READER> FUNCTION> MISC-R> SCANLAMP
The test checks to see if the scanning lamp is on or not.
Execute the when replacing the CIS unit.
● #SCAN> READER> OPTION> BODY> SENS-CNF
Setting of the document detection sensor placement
The setting of document detection size is selected in accordance with the document sensor
placement.
0: AB type
1: Inch type
● #SCAN> READER> OPTION> BODY> DFDST-L1
Dirt detection level adjustment (between documents) during ADF use.
Increase the value when dirt fails to be detected, resulting in black streaks. However, if the
value is increased too much, even small-sized dirt of the kind which does not appear on the
image will also be detected, and the cleaning instruction screen may appear frequently.
Reduce the value if users complain because the cleaning instruction screen which appears
when dirt is detected is displayed frequently. Conversely, if the value is reduced too much,
black streaks may appear on the images.
When '0' is set, the correction control function used when dirt is detected is canceled.
● #SCAN> READER> OPTION> BODY> UNK-A5R
The setting to detect a custom paper size that is smaller than A4-R (LTR-R) by the copyboard
original size detection
This is the setting whether to detect a custom paper size that is smaller than A4R (LTRR) as
A5R (STMTR) by the copyboard original size detection.
0: Detected as custom paper size
1: Detected as A5R (STMTR)
● #SCAN> READER> OPTION> USER> SIZE-DET
ON/OFF setting of the original size detection
To set ON/OFF of the original size detection.
0: OFF
1: ON
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