HP 1320 Service Manual - Page 159

Table 7-2. Solving print paper-feed problems (continued) The printer feeds multiple sheets or jams frequently from the main input tray. Cause Solution Paper guides are not adjusted correctly. Slide the guides against the sides of the stack in the main input tray or the priority input slot to center the media. Make sure that the guides are not adjusted too tightly. Media was not removed from the main input tray Always remove media from the main input tray before refilling the tray. before you refill it. The main input tray is overfilled. Remove some of the sheets. The main input tray can hold up to 250 sheets of 20-lb. (75 g/m2 ) bond weight paper (or fewer pages of heavier media, a stack no higher than 25 mm). 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 (do not "fan" the paper); this can effectively decrease multifeeds. Also try turning the paper around to feed the opposite end first, or use a different type of paper. The media does not meet HP's specifications for print media. Make sure that the media meets specifications detailed in the HP LaserJet Printer Family Media Guide. The output capacity was exceeded in the top output bin. Do not allow more than 125 sheets of 20-lb. (75 g/m2) bond weight paper (less for heavier paper) to fill the top output bin. The pickup roller is dirty. Clean the pickup roller. The pickup roller is damaged. Replace the pickup roller. The separation pad is dirty. Clean the separation pad. The separation pad is damaged. Replace the separation pad. A sensor is not operating correctly. Check the sensors to make sure that none of them are jammed. Replace sensors as needed. Media has already been printed using a laser printer and is now being re-used. Do not re-use media. ENWW Paper-path troubleshooting 147