HP LaserJet 9050DN User Manual

ENWW Correcting output quality problems129
Light print or fade
●The print cartridge might be low. Replace the print cartridge.
●Maintenance might be due. Check this by printing a copy of the supplies status page (see 
Supplies status page). If maintenance is due, order and install the printer maintenance kit. 
(See the HP support flyer or go to  www.hp.com/support/lj9050_lj9040
.)
●The print cartridge might be almost empty. Replace the print cartridge.
Specks 
Specks might appear on a page after a jam...

130Chapter 6 Problem solving ENWW
Toner smear 
Also see Loose toner .
●Print a few more pages to see if the problem corrects itself.
●Try using a different type of paper.
●Make sure that the environmental specifications for the printer are being met (see 
Environmental specifications ).
●Clean the inside of the printer (see  Cleaning the printer, or go to www.hp.com/support/
lj9050_lj9040) and run a manual cleaning page to clean the fuser (see  Using the printer 
cleaning page ).
●Maintenance might be...

ENWW Correcting output quality problems131
Page skew 
●Print a few more pages to see if the problem corrects itself.
●Verify that there are no torn pieces of paper inside the printer.
●Make sure that paper is loaded correctly, all adjustments have been made, and the paper is 
under the corner tabs (see Orienting media).
●Turn over the stack of paper in the tray. Also, try rotating the paper 180°.
●Make sure that paper type and quality meet HP specifications (see  Paper specifications).
●Make sure that...

132Chapter 6 Problem solving ENWW
Preventing wrinkles on envelopes
If envelopes are wrinkled when printed, first ensure that you are using supported types of 
envelopes. Then, use the following procedure to move the fuser levers to the higher position 
while printing the envelopes.
To prevent wrinkles on envelopes
1Open the left door (If an optional output device is installed, first slide it away from the printer).
WA R N I N G ! Avoid touching the adjacent fusing area. It can be HOT.
2 Locate and lift...

ENWWSolving common printer issues133
Solving common printer issues
Troubleshooting checklist
●Ensure that media that is loaded into the trays is from a freshly opened ream, contains no 
defects, and is installed correctly with the paper guides adjusted.
●Verify that the product is using a dedicated  circuit and is plugged directly into the wall.
NoteFor more information about an optional HP output device, see the user guide that came with the 
device.
Situation Solution
Correct size of paper is not...

134Chapter 6 Problem solving ENWW
Situation Solution
A page fails to print. Set 
PRINT PS ERRORS=ON, and then send the job again to print a PS 
error page. If this does not identify the problem, try turning off 
Resource Saving  and I/O Buffering  or try installing more memory 
(see  PCL or PS font list ).
A page prints with clipped 
margins. If the page margins are clipped, you might have to print the page at 
300-dpi resolution or install more memory. Also try turning off
 
Resource Saving  and I/O...

ENWWSolving common printer issues135
Computer software 
problem.Check that your computer is working correctly by printing from a 
program you know works, or by printing a plain text file to see if the 
problem is with your program or with your printer driver. (For example, 
C:\dir>LPTn
 where n is the number of the computer port the printer 
is connected to, for example LPT1.) To print the page, you might have 
to send a form feed command from your computer.
Control-panel settings, 
such as  RESOLUTION...

136Chapter 6 Problem solving ENWW
First page takes much 
longer to print than 
following pages.●Make sure that the printer control panel shows READY.
●Set the Sleep feature for a longer time period (see  Configuration 
page ). If a page takes longer to print due to complex formatting 
commands, changing the  Sleep setting might not improve print 
speed. You might want to simplify the page.
Garbled pages print, there 
are overprints, or only a 
portion of a page prints. 
●Make sure that your program is...

ENWWSolving common printer issues137
Job prints on the wrong 
side of the paper.●Make sure you have loaded the paper correctly. (See  Loading 
input trays , or go
 to www.hp.com/support/lj9050_lj9040.)
●If you are printing one-sided copies, load paper into optional Tray 1 
with the side to be printed facing up. Load paper in Trays 2, 3, and 
optional Tray 4 with the side to be printed facing down.
●If you are printing two-sided copies, load paper into optional Tray 1 
with the first side to be printed...

138Chapter 6 Problem solving ENWW
Optional Tray 4 will not 
work.The power cord is not firmly plugged in to both the printer and the 
power receptacle. Remove and reconnect the power cord.
Paper is loaded into 
optional Tray 1, and a load 
or manual feed message 
appears on the control-
panel display.  Load the correct paper in the tray. (See 
Loading input trays, or go to
 
www.hp.com/support/lj9050_lj9040
.) If the correct paper is already 
loaded, press  .
Paper is not going to the 
correct output...