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Service Guide OF2200/2400/2600
Chapter 1 Principles of Operation
1.2.03 Automatic Document Feeder (ADF)
The automatic document feeder transfers document sheets to the scan unit automatically, one at a time.
The following diagram shows the mechanism used for detecting the leading and trailing edges of a
document.
When a document is placed on the feeder, it is sensed by the document detect sensor (PC1). This causes
the feed rollers to activate, feeding the document. The document is fed to the PC2 lever, where the
leading edge of the document is detected. When transmit (or copy) begins, the document is fed by the
transmit stepper motor to the start scan position. The documents trailing edge is detected when the PC2
lever is released. If another document is on the feeder, the process is repeated.
The Okifax 2200/2400/2600 also contain a B4 paper width sensor (PC1). The Okifax 2600 has an
additional photosensor (PC1) to detect A3 paper width.
The separation rubber holds back the top originals and allows only one document to be fed into the
scanner area. The separation rubber and automatic document feed rollers should be cleaned or replaced
according to the cleaning schedule (in Module 3 of this manual) to assure proper operation.
The automatic document feed capacity is 50 pages of 20 pound paper. Place documents (on the feeder)
image side DOWN. When feeding multiple pages, the bottom page is fed first, working toward the top.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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