HP 3015 Service Manual - Page 113
ADF paper path and ADF sensors, ADF jam detection, HP LaserJet 3020 and 3030 ADF path
View all HP 3015 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 113 highlights
ADF paper path and ADF sensors The following diagram shows the ADF paper path. Figure 4-15. HP LaserJet 3020 and 3030 ADF path The paper-present sensor determines if paper is in the ADF. The form sensor detects the top and bottom edges of the document. One other sensor detects an open ADF door. 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 a jam message appears on the control-panel display. A jam can be detected under any of the following conditions: ● Document-feeder jam-When documents are detected 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 message Document feeder mispick. Reload. appears on the control-panel display. ● 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 381-mm (15-inch) 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 message Doc feeder jam. Clear, Reload. appears on the control-panel display. ● Stall jam-When a page that is less than 381 mm (15 inches) 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 message Doc feeder jam. Clear, Reload. appears on the control-panel display. ● 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. ENWW HP LaserJet 3020 and 3030 all-in-one unique components 95