Ricoh C211 Service Manual page 552

1-1.
Shading Adjustment
B~o.6A
* The middle of the wave form should be higher than
Purpose : To flatten the white level wave form. This also, corrects for
light intensity due to the output characteristics at both lamp
rations within the lens section.
Method : 1.
2.
3.
4.
5.
6.
the ends.
distortion to the
ends and aber-
Remove Receiving Plate [D] P/N C2033020
Close the scanner unit [A]
Press the Print Start key (Start key: 830) to turn on the fluorescent lamp.
Confirm that the above white level wave form is displayed:
If incorrect, move the shading plate [B] position vertically (up or down),
so that the wave form is similar to the one above.
After adjustment, retighten the mounting screws [C] of the shading plate
[B] .
5-13