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31 August 1989
4. ERASE
4.1
A:
Lead Edge Erase Margin
B:
Side Margins --- 2 ± 2 mm each (For full-size copies the total of both side
margins is less than 4 mm.)
Lo:
Original Image Width
Lc:
Charged Width on the Drum
El:
Lead Edge Erase
Es:
Side Erase
R:
Paper Lead Edge Registration --- 0 ± 2 mm
A+R:
Lead Edge Blank Margin --- 3.5 ± 2.5 mm
The erase unit consists of a PCB with 10 registers and a row of 80 LEDs mounted in a plastic
casing. The LEDs emit light in the yellow-green part of the spectrum.
The erase lamp performs the following functions: lead edge erase, side erase, trail edge erase,
image density pattern [g], and the editing functions. Trail edge erase begins after the trailing
edge of the copy paper; therefore, the trailing edge will not appear on the copy.
2-22
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