HP Laserjet 5 User Manual

							
Checking the Effect of a REt Setting
You can check the effect of a REt setting by printing a self test at
600-dpi and examining the Resolution Enhancement block on the
printout (see example of Menu Map printout, Figure 3-2, letterL). The
Resolution Enhancement block does not appear on menu map printouts
printed at 300 dpi.
Figure 6-2 illustrates three REt settings.  Set REt so that the REt block is
a uniform gray with no vertical lines ( B), or with vertical lines tending
toward dark ( C), rather than light ( A).
Harmonizing Print Density and REt Settings
It is suggested that both print density and REt settings be adjusted at the
same time since they affect each other.
To harmonize print density and REt settings:
1Make sure printer resolution is set to 600 dpi.
2Select a print density setting. (A default setting of 3 usually produces a
uniform gray REt block on the self test printout.)
3Print a self test and examine the Resolution Enhancement block.
4Set REt to produce a block as close to a uniform gray as possible ( B), or
with vertical lines tending toward dark ( C), rather than light ( A).
Figure 6-2
6
Adjusting Print
Quality
6
Adjusting Print
Quality
ENAdjusting Print Quality 6-5 
						

							
EconoMode Printing
Saving Toner with EconoMode
EconoMode lowers printing costs by reducing the amount of toner on
the printed page. EconoMode also substantially reduces print quality.
The result is similar to the draft mode found on some dot matrix
printers.  When set toON, the printed image is lighter (like A), but still
readable. EconoMode is a good choice for printing rough drafts.
( B represents the default OFFsetting for high quality regular printing.)
NoteThe EconoMode setting should normally be set through a software
application.  If your software does not have this option, set EconoMode
through the printer control panel.
To turn on EconoMode from the control panel:
1Press [Menu] untilPR\bNT\bN\f MENU appears.
2Press[Item] untilECONOMODE=OFF appears.
3Press- Value + to selectECONOMODE=ON .
4Press[Select] to save your selection. An asterisk ( *) appears next to
your selection in the display.
5Press [Go]to exit the menus.
Figure 6-3
6-6 Adjusting Print QualityEN 
						

							
7
Solving Printer Problems
Introduction
This chapter helps you troubleshoot printer problems in the following
areas:
•Clearing Paper Jams
•Resetting the Printer
•Testing the Printer
•Improving Print Quality
•Understanding Printer Messages
•Troubleshooting Checklist
Calling for Help
If you try all the suggestions given in this manual and still need
assistance, call the authorized Hewlett-Packard dealer where you
purchased your printer. For additional sources of assistance, see the
telephone numbers on the HP Support pages at the front of this manual.
ENSolving Printer Problems 7-1 
						

							
Clearing Paper Jams
If aREMOVE PAPER \bAM orREMOVE DUPLE\f \bAM message appears in
the display panel, look for jammed paper in any of the locations
indicated in Figure 7-1. (This message may also be displayed if the rear
door is not closed correctly.)
If paper jams are a recurring problem, see “Repeated Paper Jams” at the
end of this section.
Paper jams occur most often when:
•Paper trays are not correctly loaded (see Chapter 4).
•Your print media does not meet the specifications listed in Appendix A.
•The media is in poor condition.
•The printer needs cleaning.
•User-replaceable parts are wearing out (see Chapter 8).
NoteThe top cover or rear cover of the printer must be opened and then
closed in order to clear the paper jam message. If paper jams occur
frequently, clean the printer and check the quality of your paper or other
print media.
7-2 Solving Printer ProblemsEN 
						

							
Paper Path Jam Locations
A.Paper pickup area for Tray 2 E.Paper output area
B. Paper pickup area for Tray 1 F.Duplex rear cover area (optional)
C. Transfer guide area G.Duplex front cover area (optional)
D. Fusing assembly area H.Tray 3 (optional)
Figure 7-1
7
Solving Printer
Problems
ENSolving Printer Problems 7-3 
						

							
Paper Pickup and Transfer Guide Paper Jams
1Remove Tray 2.
2Carefully pull the paper out through
the front of the printer.
Note
Do not force the paper if it is not moving
easily. If the paper is stuck in the tray
opening remove it through the Transfer
Guide area (see next steps).
3Open the top cover and remove the
toner cartridge.
4Raise the green handle (A) to free the
paper, and ( B) pull the paper up and
out through the front of the printer.
7-4 Solving Printer ProblemsEN 
						

							
Fusing Assembly Paper Jams—Top Cover
1Open the top cover and remove the
toner cartridge.
2Remove the paper by pulling it back
out of the fuser, into the printer body.
Roll the paper toward you to avoid
spilling loose (unfused) toner.
3Clean any loose toner that may have
fallen into the printer using a dry,
lint-free cloth.
Note
If loose toner falls into the fuser, it may
cause print quality problems.
If toner gets on your clothes, wipe it off
with a dry cloth and wash your clothes in
cold water. Hot water sets toner into
fabric.
7
Solving Printer
Problems
7
Solving Printer
Problems
ENSolving Printer Problems 7-5 
						

							
Fusing Assembly and Paper Exit Paper Jams—
Rear Cover
1Open the rear cover.
WARNING!
Do not touch the fusing area, it getshot!
2Open the rear door of the fusing
assembly, if necessary.
3Pull the jammed paper from the
fusing assembly.
4If necessary, pull the paper out of the
output bin from the top edge.
7-6 Solving Printer ProblemsEN 
						

							
Optional Tray 3 Paper Jam
1Partially remove Tray 3.
2Carefullyremove jammed paper and
any pages in the tray that are
damaged.
Caution
When jammed paper is removed from the
tray too vigorously the pickup roller may be
rotated out of position. If a grinding noise
occurs during printer warm-up the roller is
out of place. Turn off the printer and follow
the instructions in the “Optional Tray 3
Pickup Roller” section in Chapter 8 for
readjusting the roller.
3If necessary, partially remove Tray 2
and remove jammed paper. (You
should not need to open or remove
the optional duplex unit, if one is
installed.)
Note
If there are frequent paper jams or
multi-feed problems in the Tray 3 area,
see “Printing from the 500-Sheet Tray 3”
in Chapter 4 and “Repeated Paper Jams”
at the end of this section.
7
Solving Printer
Problems
7
Solving Printer
Problems
ENSolving Printer Problems 7-7 
						

							
Optional Duplex Unit Paper Jams
1Remove Tray 2.
2Open the front access cover of the
duplex unit and remove any paper.
Also, remove any paper protruding
from the rear of the duplex unit.
3Open the rear duplex door and
remove any paper.
Close rear duplex door (it should latch
when completely closed).  Close the
duplex unit’s front access cover and
replace Tray 2.
7-8 Solving Printer ProblemsEN