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HP 2550L HP Color LaserJet 2550 series - User Guide - Page 121

Repetitive defects on the back, Misformed characters

UPC - 829160808703

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Repetitive defects on the back Marks repeatedly appear at even intervals on the unprinted side of the page. ● Internal parts might have toner on them. The problem will likely correct itself after a few more pages. ● Clean the printer. See Cleaning the printer. ● The fuser might be damaged. Contact HP Customer Care. See HP customer care or the support flyer that came in the printer box. ● If the problem is not resolved, see If the problem is not resolved. Misformed characters The printed page contains misformed characters. ● If characters are improperly formed so that they produce hollow images, the paper might be too slick of a paper, such as a photo, glossy, or coated paper. Use a different paper, such as high-quality paper intended for laser printers. See Print-media specifications. ● If characters are improperly formed so that they produce a wavy effect, the laser scanner might need service. Verify that the problem also occurs on the Configuration page. If so, contact HP Customer Care. See HP customer care or the support flyer that came in the printer box. ● If the problem is not resolved, see If the problem is not resolved. ENWW Solving print-quality problems 111

Section	Page
Printer basics	11
Quick access to printer information	12
User guide links	12
Where to look for more information	12
Printer configurations	14
HP color LaserJet 2550L	14
HP color LaserJet 2550Ln	14
HP color LaserJet 2550n	15
Printer features	16
Printer parts	19
Interface ports	19
Software	21
Software and supported operating systems	21
Software tips	22
Software for Windows	22
Software for Macintosh	24
Uninstalling the printing software	24
Print-media specifications	27
General guidelines	27
Paper and print media	27
Printing and storage environment	28
Envelopes	28
Labels	30
Transparencies	30
Supported media weights and sizes	31
Control panel	33
Control panel features	33
Understanding Supplies Status	34
Understanding Printer Status	34
Printing tasks	37
Loading trays	38
Loading tray 1	38
Loading optional tray 2	39
Loading optional tray 3	41
Controlling print jobs	43
About printing by Source versus by Type or Size	43
Maximizing print speed for letter-size paper	45
Gaining access to printer driver settings	45
Features in the printer driver	46
Selecting an output location	51
Printing on special media	52
Printing on envelopes	52
Printing on labels	53
Printing on transparencies	54
Printing on glossy paper	55
Printing on HP LaserJet Tough paper	56
Printing on custom-sized print media or cardstock	56
Printing on letterhead or preprinted forms	57
Printing on both sides (duplexing manually)	58
To duplex manually	58
Canceling a print job	60
Managing the printer	61
Special pages	62
Demo page	62
Configuration page	62
Supplies Status page	63
HP Toolbox	65
Supported operating systems	65
Supported browsers	65
To view the HP Toolbox	66
Status tab	66
Troubleshooting tab	66
Alerts tab	67
Documentation tab	68
Device Settings window	68
Other links	69
Color	71
Using color	72
HP ImageREt 2400	72
Media selection	72
Color options	72
Standard red-green-blue (sRGB)	72
Managing color options	74
Print in Grayscale	74
Automatic versus Manual color adjustment	74
Manual color options	74
Matching colors	76
Maintenance	77
Managing supplies	78
Supplies life	78
Checking and ordering supplies	78
Storing supplies	79
Replacing and recycling supplies	79
HP policy on non-HP supplies	80
HP fraud hotline	80
Cleaning the printer	81
To clean the engine	81
Calibrating the printer	82
To calibrate the printer at the printer	82
To calibrate the printer from the HP Toolbox	82
Problem solving	83
Resolving problems that did not generate messages	84
Troubleshooting checklist	84
Checking the network	86
Solving general printing problems	87
Solving PostScript (PS) errors	92
Solving common Macintosh problems	93
Resolving problems that generated messages	99
Messages for both Windows and Macintosh	99
Messages for Windows only	99
Resolving the control panel messages	101
Supplies Status lights	102
Printer Status lights	105
Secondary light patterns for Printer Status lights	108
Clearing jams	109
Where to look for jams	109
To clear jams from inside the printer	109
To clear jams from input areas	110
To clear jams from output areas	112
Solving print-media problems	114
Solving print-quality problems	115
Print-quality checklist	115
Solving issues with all printed documents	115
Solving issues with color documents	124
Accessories and ordering information	129
Supplies	130
Memory	131
Cable and interface accessories	132
Paper handling accessories	133
Paper and other print media	134
User-replaceable parts	136
Supplementary Documentation	137
Service and support	139
Hewlett-Packard limited warranty statement	139
Print Cartridge Limited Warranty Statement	141
Availability of support and service	142
HP maintenance agreements	142
Onsite service agreements	142
HP Express Exchange (U.S. and Canada only)	143
To use HP Express Exchange	143
Repacking the printer	144
To repack the printer	144
Service information form	146
Specifications	147
Printer specifications	147
Regulatory information	149
Introduction	149
FCC regulations	150
Environmental Product Stewardship program	151
Protecting the environment	151
Ozone production	151
Energy consumption	151
HP LaserJet printing supplies	151
Material safety data sheet	153
Declaration of conformity	154
Country-/region-specific safety statements	155
Laser safety statement	155
Canadian DOC statement	155
Korean EMI statement	155
Finnish laser statement	156
Working with memory	157
Printer memory	158
Installing memory and font DIMMs	159
To install memory and font DIMMs	159
Checking DIMM installation	161
To check DIMM installation	161
Enabling memory	162
To enable memory for Windows	162
To enable memory for Mac OS	162
Enabling the language-font DIMM	163
To enable fonts for Windows	163