HP LaserJet M4345 User Manual

							NOTEThese examples depict letter-size media that  has passed through the device.
Light print (partial page)
1.Make sure that the print cartridge is fully installed.
2. The toner level in the print cartridge might be low. Replace the print cartridge.
3. The media might not meet HP specifications (for example, the media is too moist or too rough).
See 
Select print media .
Light print (entire page)
1.Make sure that the print cartridge is fully installed.
2. Make sure that the Economode setting is turned off at the control panel and in the printer driver.
3. Open the  Aministration  menu at the device control panel. Open the  Print Quality menu and
increase the  Toner Density  setting. See 
Print Quality menu.
4. Try using a different type of media.
5. The print cartridge might be almost empty. Replace the print cartridge.
Specks
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							Specks might appear on a page after a jam has been cleared.
1.Print a few more pages to see if the problem corrects itself.
2. Clean the inside of the device and run a cleaning page. See 
Clean the device.
3. Try using a different type of media.
4. Check the print cartridge for leaks. If the print cartridge is leaking, replace it.
Dropouts 
1.Make sure that the environmental specifications for the device are being met.\
 See Printing and
paper-storage environment .
2. If the media is rough, and the  toner easily rubs off, open the  Administration menu at the device
control panel. Open the  Print Quality menu, select  Fuser Modes, and then select the media type
you are using. See 
Print Quality menu .
3. Try using a smoother media.
Lines  
A
A
A
A
AB
B
B
B
BC
C
C
C
Ca
a
a
a
ac
c
c
c
cb
b
b
b
b
1.
Print a few more pages to see if the problem corrects itself.
2. Clean the inside of the device and run a cleaning page. See 
Clean the device.
3. Replace the print cartridge.
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							Gray background  
1.Do not use media that has already been run through the device.
2. Try using a different type of media.
3. Print a few more pages to see if the problem corrects itself.
4. Turn over the stack in the tray. Also, try rotating the stack 180°.
5. Open the  Administration  menu at the device control panel. On the  Print Quality menu, increase
the  Toner Density  setting. See 
Print Quality menu.
6. Make sure that the environmental specifications for the device are being met. See 
Printing and
paper-storage environment .
7. Replace the print cartridge.
Toner smear 
1.Print a few more pages to see if the problem corrects itself.
2. Try using a different type of media.
3. Make sure that the environmental specifications for the device are being met. See 
Printing and
paper-storage environment .
4. Clean the inside of the device and run a cleaning page. See 
Clean the device.
5. Replace the print cartridge.
Also see 
Loose toner  .
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							Loose toner 
Loose toner, in this context, is defined as toner that can be rubbed off the page.
1.If media is heavy or rough, open the  Administration menu at the device control panel. On the
Print Quality  submenu, select  Fuser Modes, and then select the media type you are using.
2. If you have observed a rougher texture on one  side of your media, try printing on the smoother
side.
3. Make sure that the environmental specifications for the device are being met.\
 See 
Printing and
paper-storage environment .
4. Make sure that type and quality of the  media you are using meet HP specifications. See 
Select
print media.
Repeating defects 
1.Print a few more pages to see if the problem corrects itself.
2. If the distance between defects is 44 mm (1.7 in), 58  mm (2.3 in), or 94 mm (3.7 in), the print
cartridge might need to be replaced.
3. Clean the inside of the device and run a cleaning page. See 
Clean the device.)
Also see 
Repeating image .
Repeating image
Dear Mr. Abhjerhjk,
The dhjhfiuhu if teint hhkjhjnf j us a weue jd, fnk
ksneh vnk kjdfkaakd ss hsjhnckkajhdhf kashfhnduujdn.
Pkshkkhklhlkhkhyufwe4yrh9jjflkln djd skshkshdcnksnjcnal
aksnclnslskjlncsl nas lnslna, ncnsljsjscljckn nsnclknsllj
hwlsdknls nwljs nlnscl nijhsn clsncij hn. Iosi fsjs jlkh andjna this
is a hn. jns fir stie a djakjd ajjssk. Thsi ius vnvlu tyeh lch afted,
and when hghj hgjhk jdj a dt sonnleh. Suolklv jsdj hvjkrt ten sutc of jthjkfjkn vjdj hwjd, an olk d
.at fhjdjht ajshef. Sewlfl nv atug ahgjfjknvr kdkjdh sj hvjk
sjskrplo book. Camegajd sand their djnln as orged tyehha
as as hf hv of the tinhgh in the cescmdal vlala tojk. Ho sn shj
shjkh a sjca kvkjn? No ahdkj ahhtuah ahavjnv hv vh aefve r
Tehreh ahkj vaknihidh was skjsaa a dhkjfn anj
cjkhapsldnlj llhfoihrfhthej ahjkkjna oa h j a kah w asj kskjnk as
sa fjkank cakajhjkn eanjsdn qa ejhc pjtpvjlnv4purlaxnwl. Ana l, and the askeina of ahthvnasm. Sayhvjan tjhhjhr ajn ve fh k
v nja vkfkahjd a. Smakkljl a sehiah adheufh if you do klakc k
w vka ah call lthe cjakha aa d a sd fijs.
Sincerely,Mr. Scmehnjcj
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							This type of defect might occur when using preprinted forms or a large quantity of narrow media.
1. Print a few more pages to see if the problem corrects itself.
2. Make sure that type and quality of the media you are using meet HP specifications. See 
Select
print media .
3. If the distance between defects is 44 mm (1.7 in), 58  mm (2.3 in), or 94 mm (3.7 in), the print
cartridge might need to be replaced.
Misformed characters
AaBbCc AaBbCc
AaBbCc
AaBbCc
AaBbCc AaBbCc
1. Print a few more pages to see if the problem corrects itself.
2. Make sure that the environmental specifications for the device are being met. See 
Printing and
paper-storage environment .
Page skew
1.Print a few more pages to see if the problem corrects itself.
2. Verify that no torn pieces of media are inside the device.
3. Make sure that media is loaded correctly and that all adjustments have been made. See 
Load
media . Make sure that the guides in the tray are not too tight or too loose against the media.\
4. Turn over the stack in the tray. Also, try rotating the stack 180°.
5. Make sure that the type and quality of the media you are using meet HP specifications. See
Select print media .
6. Make sure that the environmental specifications for the device are being met. (See 
Printing and
paper-storage environment .)
7. Perform a tray alignment by opening the  Administration menu at the device control panel. On
the  Print Quality  submenu, touch  Set Registration. Choose a tray under  Source and then run a
test page. For more information, see 
Print Quality menu .
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							Curl or wave 
1.Turn over the stack in the tray. Also, try rotating the stack 180°.
2. Make sure that the type and quality of the media you are using meet HP specifications. (See
Select print media .)
3. Make sure that the environmental specifications for the device are being met.\
 (See 
Printing and
paper-storage environment .)
4. Try printing to a different output bin.
5. If media is lightweight and smooth, open the  Administration menu at the device control panel.
On the Print Quality  submenu, touch Fuser Modes, and then select the media type you are
using. Change the setting to  Low, which helps reduce the heat in the fusing process.
Wrinkles or creases 
1. Print a few more pages to see if the problem corrects itself.
2. Make sure that the environmental specifications for the device are being met.\
 See 
Printing and
paper-storage environment .
3. Turn over the stack in the tray. Also, try rotating the stack 180°.
4. Make sure that media is loaded correctly and all adjustments have been made. See 
Load media .
5. Make sure that the type and quality of the media you are using meet HP specifications. See
Select print media .
6. If envelopes are creasing, try storing envelopes so that they lie flat.
If the above actions do not improve wrinkles or creases, open the  Administration menu at the device
control panel. On the  Print Quality submenu, select  Fuser Modes, and then select the media type
you are using. Change the setting to  Low, which helps reduce the heat in the fusing process.
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							Vertical white lines  
1.Print a few more pages to see if the problem corrects itself.
2. Make sure that the type and quality of the media you are using meet HP specifications. See
Select print media .
3. Replace the print cartridge.
Tire tracks 
A
A
A
A
AB
B B
B
B C
C C
C
Ca
a
a
a
ac
c
c
c
cb
b
b b
b
This defect typically occurs when the print cartridge has far exceeded its rated life. For example, if
you are printing a very large quantity of pages with very little toner coverage.
1. Replace the print cartridge.
2. Reduce the number of pages that you print with very low toner coverage.
White spots on black 
1.Print a few more pages to see if the problem corrects itself.
2. Make sure that the type and quality of the media you are using meet HP specifications. See
Select print media .
3. Make sure that the environmental specifications for the device are being met. See 
Printing and
paper-storage environment .
4. Replace the print cartridge.
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							Scattered lines 
1.Make sure that the type and quality of the media you are using meet HP specifications. See
Select print media .
2. Make sure that the environmental specifications for the device are being met.\
 See 
Printing and
paper-storage environment .
3. Turn over the stack in the tray. Also, try rotating the stack 180°.
4. Open the  Administration  menu at the device control panel. Open the  Print Quality submenu and
change the  Toner Density  setting. See 
Print Quality menu.
5. Open the  Administration  menu at the device control panel. On the  Print Quality submenu, open
Optimize  and set Line Detail=On .
Blurred print 
1.Make sure that the type and quality of the media you are using meet HP specifications. See
Select print media .
2. Make sure that the environmental specifications for the device are being met.\
 See 
Printing and
paper-storage environment .
3. Turn over the stack in the tray. Also, try rotating the stack 180°.
4. Do not use media that already has been run through the device.
5. Decrease the toner density. Open the  Administration menu at the device control panel. Open
the Print Quality  submenu and change the  Toner Density setting. See 
Print Quality menu.
6. Open the  Administration  menu at the device control panel. On the  Print Quality submenu, open
Optimize  and set High Transfer=On . See 
Print Quality menu.
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							Random image repetition 
If an image that appears at the top of the page (in solid black) repeats further down the page (in a
gray field), the toner might not have been completely erased from the last job. (The repeated image
might be lighter or darker than the field it appears in.)
●Change the tone (darkness) of the field
 that the repeated image appears in.
● Change the order in which the images are printed. For example, have the lighter image at the
top of the page, and the darker image farther down the page.
● From your software program, rotate the whole page 180° to print the lighter image first.
● If the defect occurs later in a print job, turn the device off for 10 minutes, and then turn it on to
restart the print job.
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							Solve network printing problems
NOTEHP recommends using the device CD to install and set up the device on a network.
●Print a configuration page (see Use information pages
). If an HP Jetdirect print server is
installed, printing a configuration page also prints a second page that shows the network
settings and status.
● See the HP Jetdirect Embedded Print Server Administrators Guide
 on the device CD for help
and for more information about the Jetdirect configuration page. To open the guide, run the CD,
click  Printer Documentation , click HP Jetdirect Guide , and then click Troubleshooting the
HP Jetdirect Print Server .
● Try printing the job from another computer.
● To verify that a device works with a computer, use a USB cable to connect it directly to a
computer, and then reinstall the printing software.
 Print a document from a program that has
printed correctly in the past. If this works, a problem with the network might exist.
● Contact a network administrator for assistance.
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