HP LaserJet 4250n User Manual

							To clear jams from the optional 1,500-sheet tray 
1. Open the front door of the tray.
2. If the edge of the jammed paper is visible in the feed area, slowly pull the paper down
and out of the printer. (Do not pull the paper straight  out, or it will tear.) If the paper is not
visible, look in the top-cover area. (See 
To clear jams from the top-cover and print-
cartridge areas .)
3. Make sure that the paper does not exceed  the fill marks on the paper guides, and that
the front edge of the stack  is aligned with the arrows.
4. Close the front door of the tray.
5.
Press  (SELECT button) to clear the jam message.
6. If a jam message persists, a sheet is still  jammed in the printer. Look for the jam in
another location. (See 
Jam locations .)
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							Clearing jams from the optional duplexer 
If you are duplexing a print job and experience a jam, use this procedure to check for the
jam and to clear it.
To clear jams from the optional duplexer
1. Lift the optional duplexer up and then pull it out to remove it.
2. Remove any paper that is on top of tray 2. (You might need to reach inside the printer.)
3. Slowly pull any paper out of the optional duplexer.
4. Insert the optional duplexer into the printer.
5. If a jam message persists, a sheet is still  jammed in the printer. Look for jam in another
location. (See 
Jam locations .)
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							Clearing jams from the output areas 
Use the procedures in this section to clear jams that occur in the rear output bin or in the
optional stacker or stapler/stacker.
To clear jams from the rear output bin
1. Open the rear output bin. If most of the  media is still inside the printer, it might be easier
to remove it through the top-cover area. (See 
To clear jams from the top-cover and print-
cartridge areas .)
2. Grasp both sides of the media, and slowly  pull the media out of the printer. (Loose toner
might be on the sheet. Be careful not to  spill it on yourself or into the printer.)
NOTEIf the jammed media is difficult to remove, try  opening the top cover all the way to release
pressure on the paper. If the sheet has torn,  or if you still cannot remove it, see 
Clearing
jams from the fuser area.
3. Close the rear output bin.
4. Open and close the top cover to clear the jam message.
5. If a jam message persists, a sheet is still  jammed in the printer. Look for the jam in
another location. (See 
Jam locations .)
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							Clearing jams from the fuser area
Use this procedure only in these situations:
●Media has jammed inside the fuser and cannot  be removed from the top-cover area or
the rear-output area.
● A sheet of media has torn while you were trying to clear a jam from the fuser.
To clear jams from the fuser area
1. Turn the printer power off and  unplug the power cord from the printer.
WARNING!The fuser is very hot. To avoid minor burns,  wait 30 minutes for the fuser to cool before
removing it from the printer.
2. Turn the printer so that its rear cover faces you. If it is installed, remove the optional
duplexer by lifting it up and then pulling it out.
3. Open the rear output bin and pull the extension outward until it stops.
4. Remove the rear output bin and extension by  bending the middle of the bin down and
releasing the two hinge pins.
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							5. Firmly grasp each side of the fuser. Push the blue levers upward and pull the fuser
straight out of the printer.
6. Remove the jammed media. If necessary, lift the  black plastic guide that is located on
the top of the fuser to gain access to the jammed sheet. You can also turn the jam-
clearing wheel that is located on the side of  the fuser to attempt to eject the jammed
sheet.
CAUTIONDo not use a sharp object to clear media  from the fuser area. You might damage the fuser.
7. Push the fuser firmly into the printer until  the blue levers on both sides click into place.
8. Install the rear output bin. Pull gently on the  bin to make sure that the hinge pins are fully
inserted.
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							9. Plug the power cord into the printer.
10. Replace the optional duplexer, if it was removed.
11. Turn the printer power on.
12. If a jam message persists, a sheet is still jammed in the printer. Look for the jam in
another location. (See 
Jam locations .)
After clearing all jams, you need to send the print job again because the printer power has
been turned off.
Clearing jams from the optional stacker or stapler/stacker
Paper jams can occur in the optional stacker or the optional stapler/stacker. Staple jams can
occur only in the optional stapler/stacker.
To clear paper jams from  the optional stacker or stapler/stacker
1. At the back of the printer, open  the door on the stacker or stapler/stacker.
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							2. Carefully remove any jammed paper.
3. Close the door on the stacker or stapler/stacker.
4. If a jam message persists, a sheet is still jammed. Look for it in another location. Check
the front of the accessory and  carefully remove any jammed paper. (See 
Jam locations.)
NOTE
The output bin must be pushed down into  the lowest position for printing to continue.
To clear staple jams from the optional stapler/stacker
NOTEClear staple jams when the message  JAM IN STAPLER appears on the printer control-
panel display.
1. On the right side of the stapler/stacker, turn  the stapler unit toward the front of the printer
until the unit clicks into the open position. Pull outward on the blue staple cartridge to
remove it.
2. Rotate the green cover on the end  of the staple cartridge upward, and remove the
jammed staple.
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							3. Insert the staple cartridge into the stapler unit, and rotate the stapler unit toward the rear
of the printer until the unit snaps into place.
The stapler needs to reload after clearing a staple jam, so the first few documents (up to
five) might not be stapled. If a print job is sent  and the stapler is jammed or is out of staples,
the job will still print as long as the path to the stacker bin is not blocked.
Solving repeated jams
If paper jams occur frequently, try the following:
● Check all the jam locations. (See 
Clearing jams .) A piece of media might be stuck
somewhere in the printer. Even a small torn piece of media in the printer path can cause
repeated jams.
● Check that the trays are properly adjusted. (See 
Loading trays .) The guides should click
into place without being too tight against the media.
● Check that media is correctly loaded in the  trays and that the trays are not overfilled.
Make sure that the stack is under  the tabs and below the maximum-height indicators.
See 
Loading trays .
● Check that all trays and paper-handling accessories are completely inserted into the
printer. (If a tray is opened during  a print job, this might cause a jam.)
● Check that all covers and doors are closed. (If  a cover or door is opened during a print
job, this might cause a jam.)
● Try printing to a different output bin. (See 
Understanding media output options .)
● The sheets might be sticking together. Try bending  the stack to separate each sheet. Do
not fan the stack.
● If you are printing from tray 1, try reducing the size of the stack.
● If you are printing from the optional envelope  feeder, make sure that it is loaded correctly
(with the bottom envelopes in slightly farther than the top envelopes). (See 
Loading
envelopes in the optional envelope feeder .)
● If you are printing small sizes, feed  the media with the short-edge first. (See 
Guidelines
for custom-size paper.)
● Turn over the stack of media in the  tray. Also try rotating the paper 180 degrees.
● Check the characteristics of the paper  or other print media that you are using. Use only
media that meets HP specifications. (See 
Paper specifications .) Try using different
media to see if the problem goes away. Do not use curled, deformed, damaged, or
irregular media.
● Check that the environmental conditions for  the printer are met. (See 
Operating
environment.)
● Avoid using paper that has already been used in a printer or copier.
● Try using paper from a freshly opened ream.
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							●Try a different brand of paper.
● Do not print on both sides of envelopes or transparencies. (See 
Printing envelopes  or
Printing on transparencies .)
● Print only on full sheets of labels and do  not print on both sides of label sheets. (See
Printing on labels.)
● Check that the power supplied to the  printer is steady and meets printer specifications.
(See 
Electrical specifications .)
● Clean the printer. (See 
Cleaning the printer .)
● Perform preventive printer maintenance if maintenance is due. See 
Loading staples .
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							Understanding printer messages
Printer messages appear on the printer control panel display to relay the normal status of the
printer (such as  Processing...) or an error condition (such as  CLOSE TOP COVER) that
needs attention. 
Interpreting control-panel messages  lists the most common messages that
require attention or that might raise questions. Messages are listed in alphabetical order first,
with numeric messages at the end of the list.
Using the printer online Help system
This printer features an online Help system on  the control panel that provides instructions for
resolving most printer errors. Certain control panel messages alternate with instructions
about gaining access to the online Help system.
Whenever a message alternates with  For help press, press 
 (HELP button) to view the help
and use 
 ( UP button) and  (DOWN button) to scroll through the message.
To exit the online Help system, press  M
ENU.
Resolving persistent messages
Some messages (for example, requests to load a tray or a message that a previous pri\
nt job
is still in the printer memory) allow you to press 
 (SELECT button) to print, or to press  STOP to
clear the job and eliminate the message.
If a message persists after performing all  of the recommended actions, contact an HP-
authorized service or support provider. (See 
HP customer care  or go to  http://www.hp.com/
support/lj4250  or http://www.hp.com/support/lj4350 .)
Interpreting control-panel messages
Control panel messageDescriptionRecommended action
10.XX.YY SUPPLY
MEMORY ERROR
For help press An error has occurred in one or more of
the printers supplies. Values of XX and
YY are listed below:
XX00 = memory is defective
XX01 = memory is missing
YY00 = black print cartridge1. Turn the printer power off, and then turn the printer power on to clear the
message.
2. If the message persists, contact an HP-authorized service or support
provider (see 
HP customer care).
10.32.00
UNAUTHORIZED SUPPLY
For help press The printer has detected that a printer
supply is not a genuine HP supply.This message is displayed until you
install an HP supply or press the
override button 
 (SELECT button),
(which may void the printer warranty).
If you believe you purchased an HP
supply, go to  http://www.hp.com/go/
anticounterfeit .
Any printer repair required as a result of
using non-HP supplies or unauthorized
supplies is not covered under the printer
warranty.
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