Minolta Di450 Service Manual page 35

Operation when the Start key is pressed (EDH scanning)
1. The Exposure Lamp turns ON
2. The Scanner starts moving to the shading position.
3. A gain adjustment and a shading correction are made at the shading position.
4. The Scanner moves to the original scanning position and starts reading the original.
5. After having read the original, the Scanner moves to the home position.
Clamp level : Sets the black level when scanning an image.
Gain : Sets the maximum white level.
Power Switch ON
Scan
Scanner Motor
Stop
M51
Return
ON
Exposure Lamp
OFF
FL51
M51
FL51
Clamp
Gain
Shading Read
CONTROL SIGNAL
PWB-IC PJ3IC-1~3
CONTROL SIGNAL
PWB-B PJ5B-1
M-15
Original Read
Start Key ON
Gain and Shading Read
ON OFF WIRING DIAGRAM
Pulse Output
ON OFF WIRING DIAGRAM
L H
4002M514AA
10-A
17-F