HP 3900 series - Manual (Page 53)

Paper weight
The printer might print on multiple sheets of paper at once if the paper is under the
recommended paper weight. Use paper that is within the recommended
specifications. For paper weight specifications, see the reference guide that came with
the printer.
Paper might be loaded improperly
The printer might print on multiple sheets of paper at once if the paper is loaded too
far toward the back of the printer or if the paper guide is not positioned firmly against
the paper. Reload the paper into the paper tray, pushing the paper until you feel
resistance, and then slide the paper guide firmly against the edge of the paper stack.
The printer also might print on multiple sheets if different paper types are loaded in the
printer. For example, photo paper might be mixed with plain paper. Empty the paper
tray and load only the paper type that is appropriate for the document that you are
printing.
Printer is stalled
If the printer stalls while printing a document, raise the printer cover, and then
disconnect the power cable from the back of the printer.
Caution First, check for any loose or broken parts in the printer. If you find
loose or broken parts, go to www.hp.com/support or contact HP. Support
phone numbers are listed in the reference guide that came with the printer or
at
www.hp.com/support .
If there are no loose or broken parts, follow these steps:
1.
Check for and remove any obstacles, such as packing tape or materials, that
prevent the print cartridges from moving back and forth.
2. Make sure the print cartridges are installed securely in the print cartridge cradle.
3. Make sure the tri-color print cartridge is installed in the left side of the cradle and
the black print cartridge is installed in the right side of the cradle.
4. Check for and clear any paper jam .
5. Lower the printer cover.
6. Connect the power cable to the back of the printer, and then turn on the printer.
Print cartridge problems
Incorrect print cartridge
The printer can only print when the correct print cartridges are installed. If you receive
a print cartridge error message, one or both of the print cartridges cannot be used in
the printer.
To verify that you have the correct print cartridges:
1.
Open the printer cover.
2. Read the selection number on the print cartridge label.
User's guide 51