1-2-2 Reading Station

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.

08 July 27, 09 K.Okada A.Miyoshi I.Fujioka Refer to Revision Record on page 2. 07 Nov.12, 08 K.Okada T.Anzai I.Fujioka Refer to Revision Record on page 2. 06 Mar.10, 08 K.Okada T.Anzai I.Fujioka Refer to Revision Record on page 2. Rev. DATE DESIGN CHECK APPR. DESCRIPTION Design July 27, 2007 K.Okada CHECK K.Okada APPR. T.Anzai TITLE

fi-6140/fi-6240/fi-6130/fi-6230/fi-614PR Maintenance Manual

DRAW No.

P1PA03540-B0XX/6

CUST.

(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. White 255 Stored in White level memory

Standard output

Low output

Optical alarm Initial output

0 Black Left edge Center Right edge Pixel

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).

08 July 27, 09 K.Okada A.Miyoshi I.Fujioka Refer to Revision Record on page 2. 07 Nov.12, 08 K.Okada T.Anzai I.Fujioka Refer to Revision Record on page 2. 06 Mar.10, 08 K.Okada T.Anzai I.Fujioka Refer to Revision Record on page 2. Rev. DATE DESIGN CHECK APPR. DESCRIPTION Design July 27, 2007 K.Okada CHECK K.Okada APPR. T.Anzai TITLE

fi-6140/fi-6240/fi-6130/fi-6230/fi-614PR Maintenance Manual

DRAW No.

P1PA03540-B0XX/6

CUST.