HP 3380 Service Manual - Page 215
Jams occur in the automatic document feeder (ADF) - laserjet paper jam
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The printer feeds multiple sheets or jams frequently from the main input tray or priority input tray. Cause Solution Paper guides are not adjusted properly. Slide the guides against the sides of the stack in the media input tray or the priority input tray to center the paper. Make sure the guides are not adjusted too tightly. Paper was not removed from the main input tray Always remove paper from the main input tray before refilling the tray. before refilling it. The main input tray or priority input tray is overfilled. Remove some of the sheets. The main input tray can hold up to 250 sheets of 75-g/m 2 (20-lb) bond-weight paper (less for heavier paper) or from 20 to 30 envelopes. The priority input tray can hold up to ten sheets of 75-g/m 2 (20-lb) bond-weight paper (one sheet of heavier paper) or one envelope. The paper was poorly cut by the manufacturer and is sticking together. "Break" the ream of paper by curving it into an upside-down u-shape; this can effectively decrease multifeeds. Also try turning the paper around to feed the opposite end first, or use a different type of paper. Transparencies tend to stick to each other. Remove the stack of transparencies, and bend it along each of the four edges to separate the sheets. If the problem persists, feed transparencies oneat-a-time. The paper does not meet HP's specifications for print media. Make sure that the media meets specifications detailed in the HP LaserJet Printer Family Print Media Guide. The output capacity was exceeded in the paper output bin. Do not allow more than 125 sheets of 75 g/m2 (20-lb) bond-weight paper (less for heavier paper) to fill the paper output bin. The pickup roller is dirty or damaged. Clean the pickup roller. See Cleaning the pickup roller. Replace the pickup roller. See To replace the pickup roller. The separation pad is dirty or damaged. Clean the separation pad. See Cleaning the printer separation pad. Replace the separation pad. See Replacing the printer separation pad. A sensor is not operating properly. Check the sensors to make sure that none is jammed. If a sensor cannot be corrected, replace the sensor. Jams occur in the automatic document feeder (ADF) Occasionally, media becomes jammed during a copy, scan, or fax job. ENWW Solving paper-feed problems 199