Exposure Lamp Control - Minolta Di450 Service Manual

8-2.

Exposure Lamp Control

Control to turn ON and OFF the Exposure Lamp is provided by an Exposure Lamp Remote
signal output from PWB-B
Operation when Power Switch is switched ON
1. The Scanner moves to, and stops at, the shading position.
2. Automatic adjustment of clamp level: Sets the black level when scanning an image.
3. The Exposure Lamp turns ON
4. Automatic adjustment of gain: Sets the maximum white level.
5. The Scanner returns to its home position.
6. The Scanner moves to the shading position to make a shading correction.
7. The Scanner returns to its home position.
8. A black line check is made (only the copier equipped with an EDH). *1
9. The Exposure Lamp turns OFF.
*1: Black line check
1. Check that the EDH is lowered.
2. The Scanner moves to, and stops at, the shading position.
3. While returning to the home position, the Scanner checks the EDH scanning range for
dust and scratches that could cause a black line.
4. If any dust or scratches are found, the copier gives a warning message.
M-14