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HP LaserJet 2400 HP LaserJet 2400 Series - User Guide - Page 149

Random image repetition, TONER DENSITY, OPTIMIZE, HIGH TRANSFER=ON

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1. Make sure that the type and quality of the paper you are using meet HP specifications. (See Paper specifications.) 2. Make sure that the environmental specifications for the printer are being met. (See Operating environment.) 3. Turn over the stack of paper in the tray. Also, try rotating the paper 180°. 4. Do not use paper that already has been run through the printer. 5. Decrease the toner density. Open the Configure Device menu at the printer control panel. Open the Print Quality submenu and change the TONER DENSITY setting. (See Print Quality submenu.) 6. Open the Configure Device menu at the printer control panel. On the Print Quality submenu, open OPTIMIZE and set HIGH TRANSFER=ON. (See Print Quality submenu.) 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 application, rotate the whole page 180° to print the lighter image first. ● If the defect occurs later in a print job, turn the printer power off for 10 minutes, and then turn the printer power on to restart the print job. ENWW Correcting print-quality problems 137

Section	Page
Printer basics	13
Quick access to printer information	14
User guide links	14
Where to look for more information	14
Printer configurations	15
Feature designations for the HP LaserJet 2400 series printer	15
Printer features	16
Printer parts	20
Interface ports	21
Control panel	22
Control-panel layout	22
Control-panel buttons	23
Control-panel lights	23
Printing control-panel menus	24
Using the printer Help system	24
Changing printer-control-panel configuration settings	25
Software	35
Operating systems and printer components	35
Printer drivers	36
Software for Macintosh computers	39
Installing the printing system software	40
Uninstalling the software	45
Selecting print media	46
Supported types and sizes of print media	46
Printing tasks	49
Selecting which tray is used for printing	50
Understanding tray order	50
Customizing tray 1 operation	50
Printing by type and size of media (locking trays)	51
Manually feeding media from tray 1	52
Selecting the correct fuser mode	53
Loading trays	54
Loading tray 1 (multipurpose tray)	54
Loading tray 2 (250-sheet tray)	55
Loading optional tray 3 (500-sheet tray)	57
Understanding media output options	59
Printing on envelopes	60
To load envelopes in tray 1	60
Printing on special media	62
Printing on labels	62
Printing on transparencies	63
Printing on custom-sized media or cardstock	63
Printing on letterhead, prepunched, or preprinted paper (single-sided)	64
Printing on both sides (duplexing)	66
Paper orientation for printing on both sides	66
Layout options for printing on both sides	67
To duplex by using the built-in duplexer	67
To duplex manually	68
Canceling a print job	69
Using the printer driver	70
Changing the settings for a print job	70
Changing default settings	70
Using printer-driver features	73
Printing watermarks	73
Printing multiple pages on one sheet of paper	74
Setting a custom paper size	74
Using EconoMode (draft) printing	75
Selecting print-quality settings	75
Using reduce/enlarge options	76
Selecting a paper source	76
Printing a cover, a different first or last page, or a blank page	77
Using job-storage features	78
Proofing and holding a job	78
Deleting a held job	78
Printing a private job	79
Deleting a private job	79
Managing and maintaining the printer	81
Using the embedded Web server	82
Opening the embedded Web server	82
Information tab	83
Settings tab	83
Networking tab	84
Other links	84
Using HP Web Jetadmin software	85
Using the HP Toolbox	86
Supported operating systems	86
Supported browsers	86
To view the HP Toolbox	87
Status tab	87
Troubleshooting tab	87
Alerts tab	88
Documentation tab	88
Device Settings window	88
Toolbox links	89
Other links	89
Uninstalling the HP Toolbox	90
To uninstall the HP Toolbox by using the Windows desktop shortcut	90
To uninstall the HP Toolbox by using Add/Remove Programs in the Windows control panel	90
Managing and configuring printer drivers	91
HP Web Jetadmin software plug-in	91
Customization utility	92
Configuring e-mail alerts	93
Setting the real-time clock	94
Setting the date and time	94
Checking the printer configuration	97
Menu map	97
Configuration page	97
Supplies status page	99
PS or PCL font list	99
Managing the print cartridge	101
HP print cartridges	101
Non-HP print cartridges	101
Print-cartridge authentication	101
Print-cartridge storage	101
Print-cartridge life expectancy	102
Checking the supply level	102
Cartridge-low and cartridge-out conditions	102
Cleaning the printer	104
Cleaning the outside	104
Cleaning the paper path and print-cartridge areas	104
Cleaning the fuser	105
Problem solving	107
Troubleshooting flowchart	108
1 Does the control panel display read READY?	108
2 Can you print a configuration page?	109
3 Can you print from a program?	110
4 Does the job print as expected?	112
5 Does the printer select the proper trays?	114
Solving general printing problems	116
Guidelines for using paper	120
Printing special pages	121
Clearing jams	122
Typical jam locations	122
Understanding printer messages	128
Using the printer online Help system	128
Resolving persistent messages	128
Correcting print-quality problems	140
Print-quality checklist	140
Image defect examples	140
Light print (partial page)	142
Light print (entire page)	142
Specks	142
Dropouts	143
Lines	143
Gray background	143
Toner smear	144
Loose toner	144
Repeating defects	145
Repeating image	145
Misformed characters	145
Page skew	146
Curl or wave	146
Wrinkles or creases	147
Vertical white lines	147
Tire tracks	147
White spots on black	148
Scattered lines	148
Blurred print	148
Random image repetition	149
Troubleshooting network printing problems	150
Troubleshooting common Windows problems	151
Troubleshooting common Macintosh problems	152
Troubleshooting common PostScript problems	158
General problems	158
Specific errors	158
Supplies and accessories	161
Ordering parts, accessories, and supplies	162
Ordering directly from HP	162
Ordering through service or support providers	162
Ordering directly through the embedded Web server (for printers that are connected to a network)	162
Ordering directly through the HP Toolbox software (for printers that are directly connected to a com ...	163
Part numbers	164
Paper-handling accessories	164
Print cartridges	164
Memory	164
Cables and interfaces	165
Print media	165
Control panel menus	169
Retrieve Job menu	170
Information menu	172
Paper Handling menu	173
Configure Device menu	177
Printing submenu	177
Print Quality submenu	180
System Setup submenu	184
I/O submenu	187
Resets submenu	188
Diagnostics menu	190
Service menu	191
Specifications	193
HP LaserJet 2400 series physical specifications	193
Electrical specifications	194
Acoustic emissions	195
Operating environment	196
Paper specifications	197
Printing and paper storage environment	197
Envelopes	198
Labels	200
Transparencies	200
Printer memory and expansion	201
Overview	202
Printer memory	203
To install printer memory	203
Installing CompactFlash cards	207
To install a CompactFlash card	207
Checking DIMM or CompactFlash installation	210
To verify that DIMMs or CompactFlash cards are installed correctly	210
Saving resources (permanent resources)	211
Installing an EIO card	212
To install an EIO card	212
To remove an installed EIO card	213
Printer commands	215
Understanding PCL 6 and PCL 5e printer command syntax	216
Combining escape sequences	216
Using escape characters	217
Selecting PCL 6 and PCL 5 fonts	217
Common PCL 6 and PCL 5 printer commands	218
Regulatory information	223
Introduction	223
FCC regulations	224
Environmental Product Stewardship program	225
Protecting the environment	225
Ozone production	225
Energy consumption	225
HP LaserJet printing supplies	225
Material safety data sheet	226
For more information	227
Declaration of conformity	228
Country-/region-specific safety statements	229
Laser safety statement	229
Canadian DOC statement	229
Japanese VCCI statement	229
Korean EMI statement	229
Finnish laser statement	230
Service and support	231
Hewlett-Packard limited warranty statement	231
Print Cartridge Limited Warranty Statement	233
Availability of support and service	234
HP maintenance agreements	234
Onsite service agreements	234
HP Express Exchange (U.S. and Canada only)	235
To use HP Express Exchange	235
Repacking the printer	236
To repack the printer	236
Service information form	237

Match case Limit results 1 per page

Make sure that the type and quality of the paper you are using meet HP specifications.

(See

Paper

specifications

Make sure that the environmental specifications for the printer are being met. (See

Operating

environment

Turn over the stack of paper in the tray. Also, try rotating the paper 180°.

Do not use paper that already has been run through the printer.

Decrease the toner density. Open the Configure Device menu at the printer control

panel. Open the Print Quality submenu and change the

TONER DENSITY

setting. (See

Quality

submenu

Open the Configure Device menu at the printer control panel. On the Print Quality

submenu, open

OPTIMIZE

and set

HIGH TRANSFER=ON

. (See

Quality

submenu

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 application, rotate the whole page 180° to print the lighter image first.

●

If the defect occurs later in a print job, turn the printer power off for 10 minutes, and then

turn the printer power on to restart the print job.

ENWW

Correcting print-quality problems

137