Konica Minolta Magicolor 2490 MF, Руководство по обслуживанию

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8. Write section (PH section) Theory of operation ver. 1.0 July. 2006
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magicolor 2490MF
Composition/Operation
8.2.3 Laser emission timing
• When a ready signal is detected after the lapse of a given period of time after the print
cycle has been started, a laser ON signal is output from the print control board.
• The laser ON signal triggers the firing of each laser light which illuminates the SOS
board via the polygon mirror, G1 lens, return mirror, G2 lens (SOS lens), and SOS mirror.
This generates an SOS signal.
• This SOS (start of scan) signal unifies the timing at which the laser lights are irradiated
for each main scan line.
8.2.4 Laser emission area
A. Main scan direction
• The print start position in the CD direction is determined by the CD print start signal (/
HSYNC) that is output from the image processing board and the width of the paper.
• The laser emission area is determined by the paper size. The area of 4 mm on both
edges of the paper is, however, the void image area.
B. Sub scan direction
• The print start position in the FD direction is determined by the image write start signal (/
TOD) that is output from the image processing board and the length of the paper.
• The laser emission area is determined by the paper size. The area of 4 mm on both the
leading and trailing edges of the paper is, however, the void image area.
4138to2595c0
Void width: 4 mm
Void width: 4 mm
Void width: 4 mm
Void width: 4 mm