Original Reading Control - Konica Minolta 7020 Service Manual

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READ SECTION

Original Reading Control

Original reading is carried out by the CCD sensor on the

ADB (A/D conversion board).

The light from the exposure lamp reflects back from

the original, passes through a lens, and hits the CCD

sensor. The CCD sensor generates an analog

electrical signal corresponding to the light intensity.

The ADB (A/D conversion board) then converts this

signal into a digital signal.

Original reading

The reading timing is as follows.

(1) Platen mode

Reading starts at a predetermined time interval after

the START button is pressed and when the exposure

unit has moved 6mm in the paper feed direction after

PS14 (optics home position) goes OFF.

When the leading edge of the original turns ON

PS311 (original registration PS) then moves a further

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