Paper keeps jamming

Select "Cardstock" in the 'paper type' menu, either through your operating system's 'Print' dialog, or via the printer's front panel (or select it both places, just to be sure).

If the jams continue with your cardstock, there's another cardstock option in each of those menus. It is "Glossy Cardstock". That worked for me.

Note this slows the printing to half speed.

Step Three: Check the paper type Verify that only recommended paper is being used for printing. The recommended paper types and weights for most HP printers include:

• Plain paper, 20 to 24 lb (75 to 90 gsm)
• Legal size paper, 20 to 24 lb (75 to 90 gsm)
• Card stock, up to a maximum of 110 lb (200 gsm)
• Envelopes, 20 to 24 lb (75 to 90 gsm)
• Photo paper, 145 lb (236 gsm)

NOTE: Supported paper weights and types vary by product. Check the Specifications sheet for your product for more information.

If you use card stock up to a maximum of 110lb then there should be no special mode to enter to print on this type of paper. Photo paper weighs in at 145 lb maximum which is heavier and can be printed on without selecting any special 'mode.'

Good luck on printing on heavy card stock.

The following sections describe how to load media into the different input trays. CAUTION: If you try to print on media that is wrinkled, folded, or damaged in any way, a jam might occur. Priority feed slot The priority feed slot holds one sheet of media up to 163 g/m2 (43 lb) or one envelope, transparency, or cardstock. Load media with the top forward and the side to be printed facing up. To prevent jams and skewing, always adjust the side media guides before feeding the media. Back to top 150-sheet main input tray The input tray holds up to 150 pages of 75 g/m2 (20 lb) paper or fewer pages of heavier media of 25 mm (0.9 inches) or less stack height. Load media with the top forward and the side to be printed facing up. To prevent jams and skewing, always adjust the side and front media guides. NOTE: When you add new media, make sure that you remove all of the media from the input tray and straighten the stack of new media. This helps prevent multiple sheets of media from feeding through the printer at one time, reducing media jams.


Also go to this link to do a Printer Cleaning

Power your printer off and unplug it. Try manually feeding a sheet of heavy weight paper (cardstock) through the paper path to help push out any torn scraps of paper left from a previous jam, or any staples or paper clips etc that may have fallen into the paper path.You may need to do this multiple times. You can also try blowing in canned air to remove and paper dust that might be laying on the sensors causing a false jam message. Good luck!

Hi manitou344:
Here is some info that might help you.

Table 1-8. Tray 1 paper sizes1
Media Dimensions Weight or thickness Capacity
Minimum size paper 76 by 127 mm
(3 by 5 in)
60 to 163 g/m2
(16 to 43 lb bond)
100 sheets
(75 g/m2; 20 lb bond)
Maximum size paper 216 by 356 mm
(8.5 by 14 in)
60 to 163 g/m2
(16 to 43 lb bond)
100 sheets
(75 g/m2; 20 lb bond)
Minimum size glossy
paper
76 by 127 mm
(3 by 5 in)
75 to 120 g/m2
(20 to 32 lb bond)
Maximum stack
height: 12 mm (0.47 in)
Maximum size glossy
paper
216 by 356 mm
(8.5 by 14 in)
75 to 120 g/m2
(20 to 32 lb bond)
Maximum stack
height: 12 mm (0.47 in)
Minimum size
transparencies2
76 by 127 mm
(3 by 5 in)
0.12 to 0.13 mm thick
(4.7 to 5 mils thick)
50 sheets
Maximum size
transparencies2
216 by 356 mm
(8.5 by 14 in)
0.12 to 0.13 mm thick
(4.7 to 5 mils thick)
50 sheets
Minimum size
envelopes
76 by 127 mm
(3 by 5 in)
60 to 90 g/m2
(16 to 24 lb bond)
10 sheets
Maximum size
envelopes
216 by 356 mm
(8.5 by 14 in)
60 to 90 g/m2
(16 to 24 lb bond)
10 sheets
Minimum size label 76 by 127 mm
(3 by 5 in)
75 to 163 g/m2
(20 to 43 lb bond)
50 sheets
Maximum size label 216 by 356 mm
(8.5 by 14 in)
75 to 163 g/m2
(20 to 43 lb bond)
50 sheets
Minimum size
cardstock
76 by 127 mm
(3 by 5 in)
135 to 216 g/m2
(43 to 43 lb bond)
50 sheets
Maximum size
cardstock
216 by 356 mm
(8.5 by 14 in)
135 to 216 g/m2
(43 to 43 lb bond)
50 sheets
This printer can
detect transparencies that were not designed for use with HP Color LaserJet printers.

hi
I guess its a coz of paper jam in your printer.
Heavy cardstock and certain types of slick or coated paper can cause frequent paper jams. To better isolate the cause of your problem (machine or paper), try a new **** of regular 20 lb copy or laser paper.

• Don't Overload
  Overloading your paper tray can cause paper jams. Your manual may say that your input tray can hold 250 sheets -- but if you keep getting jams, try loading 225 sheets instead.
• Check the Paper
  Check the minimum/maximum paper weights that your printer can handle. Paper that is too thick, or too thin, can cause jams.
• If you still get paper jams after this may be its time to clear the internal of the machine..You might want to have a look at the following link..
• http://lasertoners.blogspot.com/2005/10/laser-printer-jam-fix.html
  

hope u will b helpffull
thankyou.

See the manual. It looks as if 120g/m2 is the heaviest paper it can use:
"Set Type to correspond to the paper loaded in the tray from
which you want to print. This will let you get the best quality
printout. If not, print quality may not be acheived as you want.
Thin: Less than 19 lb (70 g/m2) thin paper.
Thick: 24 lb to 32 lb (90~120 g/m2) thick paper.
Cotton: 20 lb to 24 lb (75~90 g/m2) cotton paper such as Gilbert
25 % and Gilbert 100 %.
Plain Paper: Normal plain paper. Select this type if your printer is
monochrome and printing on the 16 lb (60 g/m2) cotton paper.
Recycled: 20 lb to 24 lb (75~90 g/m2) recycled paper.
Color Paper: 20 lb to 24 lb (75~90 g/m2) color-backgrounded
paper."

Heavy cardstock and certain types of slick or coated paper can cause frequent paper jams. To better isolate the cause of your problem (machine or paper), try a new ream of regular 20 lb copy or laser paper.

• Don't Overload
  Overloading your paper tray can cause paper jams. Your manual may say that your input tray can hold 250 sheets -- but if you keep getting jams, try loading 225 sheets instead.
• Check the Paper
  Check the minimum/maximum paper weights that your printer can handle. Paper that is too thick, or too thin, can cause jams.
• If you still get paper jams after this may be its time to clear the internal of the machine..You might want to have a look at the following link..
• http://lasertoners.blogspot.com/2005/10/laser-printer-jam-fix.html