Drive; Operation; Scan And Exposure Lamp Control - Konica Minolta bizhub c450 Service Manual

Theory of Operation Ver. 1.0 Mar. 2005
7.2

Drive

Scanner Drive Cable/R
Mirror Unit
7.3

Operation

7.3.1

Scan and Exposure Lamp control

A. When the Power Switch is turned ON
1. The Exposure Unit moves in the return direction until the Scanner Home Sensor is
activated. It does not move if the Scanner Home Sensor is already activated.
2. The Exposure Unit moves in the scan direction and stops at a position under the
shading correction sheet.
3. The gain value of the CCD Sensor output voltage is adjusted for R, G, and B.
4. A shading correction is made.
5. After the adjustment has been made, the Exposure Unit moves in the return direc-
tion and stops at the Scanner Home Sensor. This position serves as the home
position.
* The same operation is performed for the auto and manual exposure control.
Home Position
Scanner Motor
Exposure Unit
Scanner Home Sensor
7. Scanner section (IR section)
Scanner Drive Cable/F
Gain Adjustment and Shading Correction
Exposure Lamp (FL201) ON
Scanner Movement
4036ma2190c0
4037T2C503AA
15