Isolate A Media Brand; Isolate A Media Type - HP Color LaserJet 9500 Service Manual

Determine whether the output device is experiencing misfeeds or
multifeed jams
The following are some possible causes of misfeeds or multifeed jams:

Isolate a media brand

If the output device jams with only one brand of media:

Isolate a media type

When jams and other problems occur frequently, it is often because the customer is using a
special paper. Customers must only use print media that conforms to all Hewlett-Packard
specifications, and should always test media before purchasing large quantities. Media should
be tested before storage to verify quality printing results. Then, if problems arise, storage or
handling conditions can be isolated as the most likely cause. The following are types of media
that might cause problems:
232 Troubleshooting
The media might be too smooth.
The media might be too heavy or too light.
The media does not meet the specifications of the output device.
The media 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 output device or media storage environment might be too humid or too dry.
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
into the printer or MFP. If the problem disappears, investigate storage and handling
conditions.
Adhesive labels
Envelopes
Transparencies
Preprinted forms and letterhead
Embossed media
Perforated paper
Chemically treated paper
Synthetic paper
Coated paper
Other special media
ENWW