Adjusting The White Level - Canon D1 Service Manual

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Adjustment > Adjustment Method (DADF) > Adjusting the White Level

Adjusting the White Level

NOTE:
This is a item of adjustment in which the white level of images made in stream reading
mode are matched with the white level of images made in copyboard cover mode. If
you omit this adjustment, the following will likely occur:
• inappropriate reproduction of background density in images made in stream reading mode
• wrong speck detection in stream reading mode
NOTE:
This system incorporates a 4-line CCD sensor which is used for two types of white level
adjustments: a monochromic adjustment and a color adjustment. "DF-WLVL1" and "DF-
WLVL2" are for the monochromic adjustment, and "DF-WLVL3" and "DF-WLVL4" are
for the color adjustment.
1) Touch the following notations in sequence to bring up the Adjustment screen:
1 COPIER
2 FUNCTION
3 CCD
2) Place paper (of the type most often used by the user) on the copyboard glass, and close
the DADF.
3) Press [DF-WLVL1] to highlight.
4) Press [OK].
Automatic adjustment starts; if it ends successfully, the screen shows [OK!].
5) Remove the paper from the copyboard glass, and place it on the original tray of the
DADF.
6) Press [DF-WLVL2] on the touch panel to highlight.
7) Press [OK].
- The machine executes auto adjustment (duplex stream reading).
- When the adjustment ends normally, the machine indicates 'OK!' on the screen.
8) If the monochromic adjustment fails, perform steps 2) to 7) again.
9) Place paper (of the type most often used by the user) on the copyboard glass, and close
the DADF.
10) Press [DF-WLVL3] to highlight.
11) Press [OK].
Automatic adjustment starts; if it ends successfully, the screen shows [OK!].
5 Adjustment > Adjustment Method (DADF) > Adjusting the White Level
12) Remove the paper from the copyboard glass, and place it on the original tray of the
DADF.
13) Press [DF-WLVL4] on the touch panel to highlight.
14) Press [OK].
- The machine executes auto adjustment (duplex stream reading).
- When the adjustment ends normally, the machine indicates 'OK!' on the screen.
15) If the color adjustment fails, perform steps 9) to 14) again.
16) Press the Reset key twice to end service mode.
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