Isolate the source of the jam Define the source of the media that is jamming: tray 1 tray 2 tray 3 (250-sheet or 500-sheet) duplexer Determine where media jams occur Check where media stops when a jam occurs. Types of jams include: input paper jams internal paper-path jams duplexer output-bin jams Determine whether the printer is experiencing misfeeds or multifeed jams The following are some possible causes of misfeeds or multifeed jams: The media might be too stiff. Check basis weight and measure caliper. See "Basis-weight field test" in chapter 9 and "Caliper field test" in chapter 2. The paper might be too smooth. Check the finish.
The paper might be too heavy or too light. Check basis weight. The customer might be attempting to print embossed paper, pre printed forms, or perforated paper that does not meet HP specifications. See “Isolate a media brand” on page 210 below or details about issues involved in printing on embossed paper. The paper might be loaded incorrectly. Turn over the sheets in the paper tray to determine if in- ream curl is causing misfeeds. The customer might be fanning media before loading it into the tray. The customer might be adding media in small amounts. Do not add small amounts of media or mix types of media in the tray.
The printer or media storage environment might be too humid or too dry. (As a result, media might be too moist or too dry.) Determine if this is the case and advise the customer. Isolate a media brand If the printer jams with only one brand of media: Try switching media brands. If the paper ream in use appears to be old, open a fresh ream of the same paper and load it properly into the printer. If the problem disappears, investigate storage and handling conditions. 210 Chapter 7 Troubleshooting C7058-90936