The following diagram shows the ADF paper path.
Figure 1-22 ADF paper path
The paper-present sensor determines if paper has been loaded in the ADF. The top-of-form sensor detects
the top and bottom edges of the document. The door open sensor detects when the ADF door is open.
ADF jam detection
The ADF uses two sensors to determine if a jam has occurred. The paper-present sensor detects the presence
of media in the ADF input tray. The top-of-form sensor detects media moving through the ADF. A jam can be
detected under any of the following conditions:
●
Document feeder mispick
When a document is detected in the ADF input tray and a command to copy/scan is received, the ADF
attempts to pick the page from the input tray. If the page is not picked is not successfully, the ADF will
pulse the motor and cycle the lift plate in an attempt to dislodge the stuck page. Three attempts are
made to advance the paper to the form sensor. If the paper does not advance, a Document feeder
mispick message will appear on the control panel display.
●
Long-document jam
If a page is picked and advanced to the top-of-form sensor, but the trailing edge of the page is not
detected within the time allowed for a 381-mm (15-inch) document (the maximum allowable page
length for the ADF), a Document feeder jam message will appear on the control panel display.
●
Stall jam
When a page that is less than 381 mm (15 inches) long has advanced to the top-of-form sensor but has
not left it within the expected period of time, the page has probably stalled or jammed, and a Document
feeder jam message will appear on the control panel display.
When a jam is detected, the ADF stops feeding paper, lowers the lift plate, and displays a jam message on the
control-panel display.
ENWW ADF operation 31
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