C4170-90959
Media Troubleshooting
135
Isolate the source from which the printer jams
Where was the paper being fed from? Possible sources include:
• Standard Paper Tray
•Tray 1
• Optional Tray
Determine where paper jams occur
Check where paper stops when a jam occurs. Types of jams include:
• Input Paper Jams
• Internal Paper Path Jams
• Output Tray Jams
Determine whether the printer is experiencing misfeeds or multi-feed
jams
The following are some possible causes of misfeeds or multi-feed jams:
• The paper may be too stiff. Check basis weight and measure caliper. See “Basis Weight
Field Test” (page 39) and “Caliper Field Test” (page 40).
• The paper may be too smooth. Check the finish. See “Paper Finish Field Test” (page 41)
• The paper may be too heavy or too light. Check basis weight. See “Basis Weight Field
Test” (page 39).
• The customer may be attempting to print embossed paper, pre-printed forms, or
perforated paper which does not meet HP specifications. (See the following section
“Isolate a Paper Type” for details about the issues involved in printing on embossed
paper.
• The paper may be loaded incorrectly. Turn over the sheets in the paper tray to determine
if in-ream curl is causing misfeeds.
• The customer may be fanning paper before loading it into the paper tray.
• The customer may be adding paper in small amounts. Do not add small amounts of
paper or mix types of paper in the tray.
• The printer or paper storage environment may be too humid or too dry. (As a result,
paper may be too moist or too dry). Determine if this is the case and advise the
customer. See “Moisture Content Field Test” (page 41).
Isolate a Paper Brand
If the printer jams with only one brand of paper:
• Try switching paper brands.
• If the paper ream being used appears to be old, open a fresh ream of the same paper
and load it properly in to the printer. If the problem disappears, investigate storage and
handling conditions.
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