Original Size Detection Control - Develop QC 2235 Plus Service Manual

Scanner section (IR section)
B. When the Start key is pressed
1. The Exposure Lamp turns ON when the Start key is pressed.
2. The gain adjustment is made when the Exposure Unit moves past the point under the
shading sheet. Thereafter, a shading correction is made.
3. The Exposure Unit starts a scan motion with the original position.
4. After completing the scan motion for the original, the Exposure Unit temporarily stops
and the Exposure Lamp goes out.
5. The Exposure Unit makes a return motion and stops at the home position. Each of the
R, G, and B data is stored in memory during a single scan motion. The Exposure Unit
therefore makes only a single scan motion even for a multi-copy cycle.
Home Position
Original Position
Gain Adjustment and Shading Correction
Scan
3.3.2

Original Size Detection control

A. Detection Method
• Reflective size sensors are used for detection of the size of the original.
• Mounting the optional size sensors permits detection of originals of inch size.
Original Size Sensor FD1
(PC203)
Metric area: Standard
Inch area: Option
A5R
B5R
A4R
7
B4,
B5
6
A3,
A4
Original Size Sensor
CD1 (PC206)
Original Size Sensor
CD2 (PC207): Option
QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
Exposure Lamp (FL201) ON
Original Size Sensor
FD2 (PC204)
8.5 X 11 8.5 X 11 R 8.5 X 14
2 3 4 5
1
8
A4,
A5R B5R
B5
2-6
Original Size Sensor
FD3 (PC205): Option
11 X 17
8.5 X 14
8.5 X 11 R
11 X 17
8.5 X 11
A4R
B4 A3
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