Original Size Detection Control - Konica Minolta Bizhub 501 Service Manual

Theory of Operation Ver.2.0 Mar. 2009
6.3.2

Original size detection control

A. Detection method
The original size detection method varies for the DF mode and the platen mode.
(1) DF mode
See DF-613 Service Manual.
(2) Platen mode
• Main scan direction
Reading is made by the CCD sensor.
• Sub-scan direction
Detection is made according to the ON/OFF of the APS sensor (PS32).
Original size
A3
11 x 17
B4
8 / x 14 *1
1
2
8 / x 11S
1
2
A4S
A4
8 / x 11
1
2
B5
A5
B5S
A5
5 / x 8 /
1 1
2 2
B6
*1 No discrimination is made between 8
8 / x 11S.
1
2
B. Detection timing
(1) Platen mode (while in DF closed)
When the APS timing sensor (PS31) turns on while in DF closed, the original size is detected.
(2) Platen mode (while in DF open)
When the start key is pressed, the original size is detected.
CCD sensor
(Detection length: mm)
297
279.4
257
215.9
215.9
210
297
279.4
257
210
182
148
139.7
128
/ x 14 and 8
1
2
PS32
(ON/OFF)
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
/ x 11S. When the size is 8
1
2
6. SCANNER SECTION
/ x 14, this is detected as
1
2
17