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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
20
/
257
Section 1-2-2
1-2-2 Reading Station
(1) ADF optical system
Documents are set in the ADF paper chute (Chuter Unit) facing front side down. The front side of a document is scanned by the
Optical Unit in the Base Unit, and the backside of a document is scanned by the Optical Unit in the Upper Unit. These two
Optical Units have the same part number.
An image on a document is projected to a color CCD through lens and mirror system and converted to signals with 10 bit per
pixel at 600 dpi resolution.
(2) FB optical system fi-6240/fi-6230
When FB scanning is specified, a document set on the document bed (glass) is scanned by the Optical Unit of the Carrier unit,
which moves in the direction of sub scanning.
The Carrier unit also includes the Lamp and the Inverter to illuminate the document. The Optical Unit, Lamp and Inverter used in
FB are the same type as those used in ADF.
(3) FB scanning control fi-6240/fi-6230
During initial processing immediately after power-on, the Carrier unit moves to the home position (the opposite side of ADF).
When FB scanning is specified, the scanner moves the Carrier unit to scan the white reference in FB and then adjust the gain of
CCD amplifier as a result of scanning the white reference. At that time, if the CCD output does not reach the standard level even
after increasing the gain to the maximum level, an optical alarm occurs.
After successful gain adjustment, the scanner scans the specified length of the document while shifting the Carrier unit in the sub
scanning direction at the speed that corresponds to the specified scanning resolution. If abnormal electric current runs through the
FB Motor, the current is cut off by the motor fuse (the same type as that used in ADF) in Control PCA.
(4) Light source
The scanner uses three Lamps (Incandescent fluorescent lamp) which illuminate the scanning areas in order to get sufficient CCD
output. The Lamps are turned ON/OFF by the Inverters that are controlled by the Control PCA.
The life of a Lamp is about 10,000 hours, which means the Lamp lasts during the life of device and is not a consumable.