CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-8
B.
Electrical System
Adjustment items for the electrical system include automatic shading correction and
image positioning adjustment. When the main parts listed for each below are replaced,
perform adjustments.
• When the scanning lamp is replaced: automatic shading adjustment
• When the CCD unit is replaced: automatic shading adjustment
• When the image processor circuit board is replaced: image positioning adjustment,
automatic shading adjustment
1.
Automatic shading adjustment
1) Open the 3 covers of the control panel’s one-touch panel. Set the slide switch ON
2) Enter the service mode and select TEST MODE. (See page 4-56)
3) Press 2 on the control panel’s numeric keypad. (TEST MODE”: CCD will be select-
ed.)
4) When you press 8 on the numeric keypad, automatic shading adjustment will start.
5) When OK is displayed on the display, the adjustment is finished.
6) After pressing the control panel stop key, press the clear key. (To exit TEST MODE.)
7) Turn the control panel slide switch OFF.
2.
Image positioning adjustment
1) Make a test chart with marks every 1cm from the leading and left edges of the page,
as shown in the figure below.
Figure 2-12
10mm
10mm
Left edge
Leading edge
A4 size copy paper
Mark a line