ADF Jam Detection The ADF has two sensors that detect paper. The paper present sensor detects the presence of media in the ADF input tray. The form sensor detects media moving through the ADF. If a jam is detected, the ADF immediately stops the paper feeding and the control panel displays a jam message. A jam can be detected under any of the following conditions: Document feeder jam— When documents are detected as present in the ADF input tray, and a command to copy, scan or fax is received, the scan module travels to the left side of the scan assembly and stops beneath the ADF scanner glass.
The ADF then attempts three times, or for about ten seconds, to advance the paper to the form sensor. If the paper does not advance, the scan module travels back to the home position on the right side of the scanner assembly. The control panel displays the message Doc. Feed Mispick. Reload. Long document jam— If the paper has advanced to trigger the form sensor, but the trailing edge is not detected within the time allowed for a 15 in document (the maximum allowable page length for the ADF), the scanner returns to the home position at the right side of the scanner assembly. The control panel displays the message Doc. Feed Jam.
Stall jam— When a page that is less than 15 in long has advanced to the form sensor but has not left it within the expected time, the paper has probably stalled or jammed. The scanner returns to the home position at the right side of the scanner assembly. The control panel displays the message Doc. Feed Jam. Other— If the paper stops in the ADF and the scan module remains under the ADF scanner glass, an internal firmware error has probably occurred. This is usually remedied by cycling the power. EN Scanner and ADF functions and operation 83