HP LaserJet M4345 User Manual

							3.If the jammed media is inside the device, carefully  pull the jammed media out of the device.
4.If the jammed media is inside the 3-bin mailbox or the stapler/stacker, carefully pull the jammed
media up and out of the device.
5.If you are using a 3-bin mailbox, the jammed media might be completely inside the device.
Open the jam-access cover that is on the top of the 3-bin mailbox, and carefully pull the jammed
media out of the mailbox.
6.Reinstall the output-bin assembly, the 3-bin mailbox, or the stapler/stacker. Insert the device at
an angle, and then slide it into the device.
7. If a jam message persists, jammed media is still  in the device. Look for the jam in another
location.
Clear jams from the fuser
Use this procedure to clear jams that occur in the fuser.
1. Turn the device off and wait 30 minutes for the fuser to cool.
WARNING! The fuser is very hot. To avoid minor  burns, wait 30 minutes for the fuser to
cool before removing it from the device.
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							2.If you are using the standard output bin, grasp  the handle at the bottom of the output-bin
assembly, and pull it out and then up to remove it.
3. If you are using a 3-bin mailbox or a stapler/stacker, remove any media that is stacked, and
then press and hold the release button  on the top of the device. Pull the device away from the
device.
4. Remove the optional duplexer or the duplex cover.
5.If you cannot see the jammed media  inside the fuser, skip to step 9.
6. If you can see either the leading edge or the  trailing edge of the jammed media inside the fuser,
carefully pull it out.
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							7.If you can see the jammed media, but neither the leading edge nor the trailing edge is visible,
gently pull on the sides of the sheet of  media until one edge becomes free. Then carefully pull
the jammed media out of the fuser.
8. If the media tears as you are removing it, turn the green dial on the fuser, and then carefully pull
out the jammed media. Go to step 13.
9.To remove the fuser-entrance guide, push inward at the left edge to free the left-side alignment
pin. Then lift up slightly on the fuser-entrance guide, and remove it from the device. Place your
forefingers on the blue levers on the bottom of each  side of the fuser. Place your thumbs on the
grip points on the top of each side of the  fuser. Squeeze the blue levers up, and remove the
fuser from the device.
10. Open the black cover at the top of the fuser, and remove the jammed media.
11.Reinstall the fuser. Push on the fuser with your thumbs to be sure it snaps securely into place.
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							12.To reinstall the fuser-entrance guide, first insert the  right-side mounting pin into the hole on the
right side, and then lower the left-side mounting pin into the hole on the left side.
13. Reinstall the duplexer or the duplex cover.
14.Reinstall the output-bin assembly, the 3-bin mailbox,  or the stapler/stacker. Insert the device at
an angle, and then slide it into the device.
15. If a jam message persists, jammed media is still in the device. Look for the jam in another
location.
Clear jams from the document feeder
Use this procedure to clear jams from the document feeder.
1.Lift the document-feeder input tray, and check  for jammed media underneath the tray. Carefully
remove any jammed media.
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							2.Pull up on the document-feeder-cover -release lever, and open the document feeder cover.
Carefully remove any jammed media.
3. Lift the green jam lever on the document guide, and then check for jammed media. Carefully
remove any jammed media.
4.Close the document feeder cover.
5.If a jam message persists, jammed media is still  in the device. Look for the jam in another
location.
Solve repeated jams
SituationSolution
General repeated jam problems 1.Make sure that the media is loaded correctly in the trays and that all width
guides are set correctly (see Load media ).
2. Make sure that the tray is set for the size of media that is installed and that
the tray is not overloaded.
3. Try turning over the stack of media in the tray. If you are using prepunched
or letterhead paper, try printing from tray1.
4. Do not use media that has been  printed on previously or torn, worn, or
irregular media. See 
Select print media .
5. Check the media specifications. (See 
Select print media .) If media is outside
of the recommended specifications, problems can occur.
ENWW Clear jams 203
 
						

							SituationSolution
6.The device might be dirty. Clean the device as described in Clean the device .
7. Check that all damaged or jammed media is removed from device.
Repeated jams in the document feeder 1.The document feeder might be dirty. Clean the document feeder as
described in Clean the document feeder .
2. Make sure that the media is loaded squarely and that the media-width
guides are adjusted to the sides of the media stack.
3. Make sure that no more than 50sheets of 75g/m
2 (20lb) bond paper are
loaded in the document feeder.
4. If the original document that is being copied has been folded or stapled,
flatten it as much as you can and smooth any wrinkles. Make sure the pages
are not stuck together where the staple was.
5. Media that has been pre-punched or perforated in any way might be difficult
to feed through the document feeder. If the leading edge of the document is
excessively worn or frayed, try rotating the document 180degrees before
copying.
NOTE If jams continue, contact your HP-authorized service provider. (See the HP support
flyer or go to 
http://www.hp.com/support/ljm4345mfp .)
Paper-path test
The paper path test can be used to verify  that various paper paths are working correctly or to
troubleshoot problems with tray configuration.
1. Scroll to and touch Administration .
2. Scroll to and touch Troubleshooting .
3. Scroll to and touch Paper Path Test .
4. Touch  Print Test Page .
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							Clear staple jams
The stapler is designed to be free of staple jams. To reduce the risk of staple jams, make sure that
you observe the following media limits:
● Plain media: 30 sheets of 75 g/m
2 (20 lb) media
Glossy media: 20 sheets
Thick media (128-199 g/m
2 [34-53 lb]): Stack height must not exceed 3mm (0.27 inches)
Occasionally, staples become jammed in the optional stapler/stacker. If jobs are not being stapled
correctly or are not being stapled at all, use the following procedure to clear staple jams.
1. Turn off the device.
2. Press and hold the release button on the  top of the stapler/stacker. Pull the stapler/stacker
away from the device.
3. Open the staple-cartridge cover.
4.To remove the staple cartridge, pull up on the green handle and pull out the staple cartridge.
ENWW Clear staple jams 205
 
						

							5.Lift up on the small lever at the back of the staple cartridge.
6.Remove the staples that protrude from the staple cartridge.
7.Close the lever at the back of the staple cartridge. Be sure that it snaps into place.
8.Reinsert the staple cartridge into the staple-cartridge  holder, and push down on the green
handle until it snaps into place.
9. Close the staple-cartridge cover, and slide the stapler/stacker into the device.
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							Solve print-quality problems
This section helps you define print-quality problems and what to do to correct them. Often print-
quality problems can be handled easily by making sure that the device is correctly maintained, using
print media that meets HP specifications, or running a cleaning page.
Print-quality problems associated with media
Some print-quality problems arise from the use of inappropriate media.
●Use media that meets HP specifications. See 
Select print media
.
● The surface of the media is too smooth. Use media that meets HP specifications. See 
Select
print media
.
● The moisture content is uneven, too high, or too
 low. Use media from a different source or from
an unopened ream.
● Some areas of the media reject toner. Use 
media from a different source or from an unopened
ream.
● The letterhead you are using is printed on
 rough media. Use a smoother, xerographic media. If
this solves your problem, ask the supplier of your letterhead to use media that meets the
specifications for this device. See 
Select print media .
● The media is excessively rough. Use a smoother, xerographic media.
● The driver setting is incorrect. To 
change the media type setting, see 
Control print jobs.
● The media that you are using is too heavy for
 the media type setting that you selected, and the
toner is not fusing to the media.
Print-quality problems associated with the environment
If the device is operating in excessively humid  or dry conditions, verify that the printing environment
is within specifications. See 
Printing and paper-storage environment .
Print-quality problems associated with jams
Make sure that all sheets are cleared from the paper path. See Clear jams.
● If the device recently jammed, print two to three pages to clean the device.
● If the sheets do not pass through the 
fuser and cause image defects on subsequent documents,
print three pages to clean the device. If the problem persists, print and process a cleaning page.
See 
Clean the device.
Image defect examples
Use the examples in this image-defect table to determine which print-quality problem you are
experiencing, and then see the corresponding reference  pages to resolve the problem. These
examples identify the most common print-quality problems. If you still have problems after trying the
suggested remedies, contact HP Customer Support.
ENWW Solve print-quality problems 207
 
						

							See Light print (partial
page)
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page)
See SpecksSee SpecksSee Dropouts
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See Repeating image
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208 Chapter 11   Problem solving ENWW