HP LaserJet M4345 User Manual

Solve copy problems
Prevent copy problems
The following are a few simple steps you can take to improve copy quality:
●Copy from the flatbed scanner. This will produce a higher quality copy than copying from the
automatic document feeder (ADF).
● Use quality originals.
● Load the media correctly. If the media is
 loaded incorrectly, it might skew, causing unclear
images and problems with the OCR program. See 
Load media  for instructions.
● Use or make a carrier sheet to protect your originals.
NOTE...

ProblemCauseSolution
Unwanted lines appear on the copy.
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Tray 1 or tray 2 might not be installed
correctly.Verify that the tray is in place.
The flatbed scanner or the ADF glass
might be dirty.Clean the flatbed scanner or the ADF
glass. See 
Clean the device
.
The photosensitive drum inside the
print cartridge might have been
scratched.Install a new HP print cartridge. SeeChange the print cartridge .
Black dots or streaks appear on the
copy.Ink, glue,...

ProblemCauseSolution
Problems with feedingThe paper has ragged edges.Use high-quality paper that is made for
laser printers.
The paper varies from side-to-side.Turn the paper over.
The paper is too moist, too rough, too
heavy or too smooth, has the wrong
grain direction, or is of short-grain
construction or it is embossed or from
a faulty paper lot.●Try another kind of paper,
between 100 and 250 Sheffield, 4
to 6% moisture content.
● Use long-grain paper.
Print is crooked or misaligned on the
page.The...

Performance problems
ProblemCauseSolution
No copy came out.The input tray might be empty.Load media in the device. SeeLoad
media for more information.
The original might have been loaded
incorrectly.Load the original correctly in the ADF
or flatbed scanner. See Load media.
Copies are blank. The sealing tape might not have been
removed from the print cartridge.Remove the print cartridge from the
device, pull out the sealing tape, and
then reinstall the print cartridge.
The original might have been loaded...

Solve fax problems
Solve sending problems
Faxes quit during sending.
Cause
Solution
The fax machine to which you are sending might be
malfunctioning.Call the recipient to make sure that the receiving fax
machine is turned on and ready to receive faxes, or try
sending to another fax machine.
Your telephone line might not be working, or the line might
be experiencing interference.Disconnect the fax cable from the telephone jack, and then
connect a telephone. Make a phone call to ensure that the
telephone...

Faxes you send are not arriving at the receiving fax machine.
Cause
Solution
The receiving fax machine might be turned off or might have
an error condition, such as being out of paper.Call the recipient to make sure that the fax machine is
turned on and ready to receive faxes.
A fax might be stored in memory because it is waiting to
redial a busy number, or there are other jobs ahead of it
waiting to be sent.If a fax job is in memory for either of these reasons, an entry
for the job appears in the fax...

Faxes are transmitting or being received very slowly.
Cause
Solution
The resolution at which the fax was sent or is being received
is very high. A higher resolution typically results in better
quality, but also requires a longer transmission time.If you are receiving the fax, call and ask the sender to
decrease the resolution and resend the fax. If you are
sending, decrease the resolution or change the Page
Content mode setting. See the fax guide for information
about changing the settings.
A poor...

Solve e-mail problems
If you are unable to send e-mails by using the digital-send feature, you might need to reconfigure the
SMTP gateway address or the LDAP gateway address. Print a Configuration page to find the current
SMTP and LDAP gateway addresses. Use the following procedures to check if the SMTP and LDAP
gateway addresses are valid.
Validate the SMTP gateway address
NOTEThis procedure is for Windows operating systems.
1.
Open an MS-DOS command prompt: click  Start, click Run, and then type  cmd....

Solve common Windows problems 
Error message:
General Protection FaultException OE
Spool32
Illegal Operation
Cause
Solution
Close all software programs, restart Windows, and try again.
Select a different printer driver. If the device PCL 6 printer
driver is selected, switch to the PCL 5 or HP postscript level
3 emulation printer driver, which can be done from a
software program.
Delete all temp files from the Temp subdirectory. Determine
the name of the directory by opening the AUTOEXEC.BAT
file and...

Solve common Macintosh problems
In addition to the problems that are listed in Solve general device problems, this section lists
problems that can occur when using Mac OS X.
NOTE  Setup for USB and IP printing is performed through the  Desktop Printer Utility. The
device will  not appear in the Chooser.
The printer driver is not listed in the Print Center or Printer Setup Utility.
Cause
Solution
The device software might not have been installed or was installed
incorrectly.Make sure that the PPD is in...