08
July 27, 09 K.Okada
A.Miyoshi I.Fujioka
Refer to Revision Record on page 2.
TITLE
fi-6140/fi-6240/fi-6130/fi-6230/fi-614PR
Maintenance Manual
07
Nov.12, 08 K.Okada
T.Anzai
I.Fujioka
Refer to Revision Record on page 2.
CUST.
06
Mar.10, 08 K.Okada
T.Anzai
I.Fujioka
Refer to Revision Record on page 2.
DRAW
No.
P1PA03540-B0XX/6
Rev. DATE DESIGN CHECK APPR. DESCRIPTION
Design
July 27, 2007
K.Okada
CHECK
K.Okada
APPR.
T.Anzai
PFU LIMITED
Page
21
/
257
Section 1-2-2
(5) Scan controller
Before scanning a document, the scanner scans white background of the scanning area and adjusts the gain of CCD amplifier. If
the CCD output does not reach a certain level after the gain adjustment, Optical alarm is issued.
When the gain adjustment completes successfully, the scanner feeds the document to the scanning area at the speed that
corresponds to specified scanning resolution. Then the leading edge of the document is detected by the TOP sensor in front of the
scanning area. After the document is fed from TOP sensor by some defined length for front and back side scanning (the length
which determines sub-scanning offset), the scanner starts scanning the image. The scanner terminates scan operation when the
length specified from the host is scanned (Fixed size scanning) or when the TOP sensor detects the trailing edge of a document
(Page end detection scanning).
White
Stored in White level memory
255
0
Left edge
Right edge
Center
Pixel
Black
Initial output
Standard output
Low output
Optical alarm
