Drive; Operation; Scan And Exposure Lamp Control - Develop QC 2235 Plus Service Manual

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004
3.2

Drive

[2]
[1]
[1] Scanner Drive Cable/R
[2] Mirror Unit
[3] Exposure Unit
3.3

Operation

3.3.1

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 acti-
vated. 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 shad-
ing 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 direction
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
[4]
[3]
[6]
Gain Adjustment and Shading Correction
2-5
Scanner section (IR section)
[5]
[4] Scanner Motor
[5] Scanner Drive Cable/F
[6] Scanner Home Sensor
Exposure Lamp (FL201) ON
Scanner Movement
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