HP LaserJet M4345 Multifunction Printer series - Manual (Page 200)

Common causes of jams
The device is jammed. 1
Cause Solution
The media does not meet specifications. Use only media that meets HP specifications. See Select
print media .
A component is installed incorrectly. Verify that the print cartridge is correctly installed.
You are using media that has already passed through a
device or copier. Do not use media that has been previously printed on or
copied.
An input tray is loaded incorrectly. Remove any excess media from the input tray. Make sure
that the stack is below the maximum stack height mark in
the tray. See
Load media .
The media is skewed. The input-tray guides are not adjusted correctly. Adjust them
so they hold the stack firmly in place without bending it.
The media is binding or sticking together. Remove the media, flex it, rotate it 180°, or flip it over.
Reload the media into the input tray.
The media is removed before it settles into the output bin. Reset the device. Wait until the page completely settles in
the output bin before removing it.
During two-sided printing, you removed the paper before the
second side of the document was printed. Reset the device and print the document again. Wait until
the page completely settles in the output bin before
removing it.
The media is in poor condition. Replace the media.
The internal tray rollers are not picking up the media. If the media is heavier than 120 g/m 2 (32 lb), it might not be
picked from the tray.
The media has rough or jagged edges. Replace the media.
The media is perforated or embossed. Perforated or embossed media does not separate easily.
Feed single sheets from tray 1.
Device supply items have reached the end of their useful life. Check the device control panel for messages prompting you
to replace supplies, or print a supplies status page to verify
the remaining life of the supplies. See
Use information pages .
Paper was not stored correctly. Replace the paper in the trays. Paper should be stored in
the original packaging in a controlled environment.
Not all device packing material was removed. Verify that the packing tape, cardboard, and plastic shipping
locks have been removed from the device.
1 If the device still continues to jam, contact HP Customer Support or your authorized HP service provider.
188 Chapter 11 Problem solving ENWW