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HP Color LaserJet Enterprise M751 User Guide - Page 179

Resolve print-quality problems, Table 6-4

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Table 6-4 Blank page - No print Sample Description The page is completely blank and contains no printed content. Possible solutions 1. Make sure that the cartridges are genuine HP cartridges. 2. Make sure that the cartridge is installed correctly. 3. Print with a different cartridge. 4. Check the paper type in the paper tray and adjust the printer settings to match. If necessary, select a lighter paper type. 5. If the issue persists, go to support.hp.com. Table 6-5 Color plane registrations defects (color models only) Sample Description Possible solutions One or more color plane(s) is not aligned 1. with the other color planes. This registration error will typically occur with yellow. 2. Reprint the document. From the printer control panel, calibrate the printer. 3. If a cartridge has reached a Very Low state, or the printed output is severely faded, replace the cartridge. 4. From the printer control panel use the Restore Calibration feature to reset the printer's calibration settings to the factory defaults. 5. If the issue persists, go to support.hp.com. ENWW Resolve print-quality problems 169

Section	Page
Printer overview	11
Warning icons	12
Potential shock hazard	13
Printer views	14
Printer front view	14
Printer back view	15
Interface ports	16
Control-panel view	17
Printer specifications	19
Technical specifications	19
Supported operating systems	21
Mobile printing solutions	22
Printer dimensions	24
Power consumption, electrical specifications, and acoustic emissions	26
Operating-environment range	26
Printer hardware setup and software installation	27
Paper trays	29
Introduction	30
Load paper to Tray 1 (multipurpose tray)	30
Introduction	30
Tray 1 paper orientation	32
Use alternative letterhead mode	36
Enable Alternative Letterhead Mode by using the printer control-panel menus	36
Load paper to Tray 2	37
Introduction	37
Tray 2 paper orientation	39
Use Alternative Letterhead Mode	42
Enable Alternative Letterhead Mode by using the printer control-panel menus	42
Load paper to the 550-sheet paper tray	43
Introduction	43
550-sheet paper tray paper orientation	46
Use alternative letterhead mode	49
Enable Alternative Letterhead Mode by using the printer control-panel menus	49
Load paper to the 2 x 550-sheet paper trays	50
Introduction	50
2 x 550-sheet paper tray paper orientation	53
Use alternative letterhead mode	56
Enable Alternative Letterhead Mode by using the printer control-panel menus	56
Load paper to the 2,700-sheet high-capacity input paper trays	57
Introduction	57
2,700-sheet HCI paper tray paper orientation	59
Use alternative letterhead mode	61
Enable Alternative Letterhead Mode by using the printer control-panel menus	61
Load and print envelopes	62
Introduction	62
Print envelopes	62
Envelope orientation	62
Load and print labels	64
Introduction	64
Manually feed labels	64
Label orientation	65
Supplies, accessories, and parts	67
Order supplies, accessories, and parts	68
Ordering	68
Supplies and accessories	68
Maintenance/long-life consumables	69
Customer self-repair parts	70
Configure the HP toner-cartridge-protection supply settings	71
Introduction	71
Enable or disable the Cartridge Policy feature	71
Use the printer control panel to enable the Cartridge Policy feature	71
Use the printer control panel to disable the Cartridge Policy feature	71
Use the HP Embedded Web Server (EWS) to enable the Cartridge Policy feature	72
Use the HP Embedded Web Server (EWS) to disable the Cartridge Policy feature	72
Troubleshoot Cartridge Policy control panel error messages	73
Enable or disable the Cartridge Protection feature	73
Use the printer control panel to enable the Cartridge Protection feature	73
Use the printer control panel to disable the Cartridge Protection feature	73
Use the HP Embedded Web Server (EWS) to enable the Cartridge Protection feature	73
Use the HP Embedded Web Server (EWS) to disable the Cartridge Protection feature	74
Troubleshoot Cartridge Protection control panel error messages	75
Replace the toner cartridges	76
Toner-cartridge information	76
Remove and replace the cartridges	77
Replace the imaging drums	80
Imaging drum information	80
Remove and replace the imaging drums	81
Replace the toner-collection unit	83
Toner-collection unit information	83
Remove and replace the toner-collection unit	83
Print	87
Print tasks (Windows)	88
How to print (Windows)	88
Automatically print on both sides (Windows)	88
Manually print on both sides (Windows)	89
Print multiple pages per sheet (Windows)	89
Select the paper type (Windows)	90
Additional print tasks	91
Print tasks (macOS)	92
How to print (macOS)	92
Automatically print on both sides (macOS)	92
Manually print on both sides (macOS)	92
Print multiple pages per sheet (macOS)	93
Select the paper type (macOS)	93
Additional print tasks	93
Store print jobs on the printer to print later or print privately	94
Introduction	94
Create a stored job (Windows)	94
Create a stored job (macOS)	95
Print a stored job	96
Delete a stored job	96
Delete a job that is stored on the printer	96
Change the job storage limit	96
Information sent to printer for Job Accounting purposes	97
Mobile printing	98
Introduction	98
Wi-Fi, Wi-Fi Direct Print, NFC, and BLE printing	98
HP ePrint via email	99
AirPrint	99
Android embedded printing	100
Print from a USB flash drive	101
Introduction	101
Enable the USB port for printing	101
Print USB documents	102
Print using high-speed USB 2.0 port (wired)	103
Enable the high-speed USB port for printing	103
Manage the printer	105
Advanced configuration with the HP Embedded Web Server (EWS)	106
Introduction	106
How to access the HP Embedded Web Server (EWS)	106
HP Embedded Web Server features	107
Information tab	107
General tab	108
Print tab	108
Supplies tab	109
Troubleshooting tab	109
Security tab	110
HP Web Services tab	110
Networking tab	110
Other Links list	112
Configure IP network settings	113
Printer sharing disclaimer	113
View or change network settings	113
Rename the printer on a network	113
Manually configure IPv4 TCP/IP parameters from the control panel	113
Manually configure IPv6 TCP/IP parameters from the control panel	114
Link speed and duplex settings	114
Printer security features	116
Introduction	116
Security statements	116
Assign or change the system password using the HP Embedded Web Server	116
IP Security	117
Encryption support: HP High Performance Secure Hard Disks	117
Lock the formatter	117
Energy-conservation settings	118
Introduction	118
Set the idle settings	118
Set the sleep timer and configure the printer to use 1 watt or less of power	118
Set the sleep schedule	119
HP Web Jetadmin	120
Software and firmware updates	121
Solve problems	123
Customer support	124
Control panel help system	125
Reset factory settings	126
Introduction	126
Method one: Restore factory settings from the printer control panel	126
Method two: Restore factory settings from the HP Embedded Web Server (network-connected printers onl ...	126
A “Cartridge is low” or “Cartridge is very low” message displays on the printer control panel	127
Change the “Very Low” settings	127
Order supplies	127
Printer does not pick up paper or misfeeds	128
Introduction	128
The printer does not pick up paper	128
The printer picks up multiple sheets of paper	130
Clear paper jams	134
Introduction	134
Paper jam locations	134
Auto-navigation for clearing paper jams	135
Experiencing frequent or recurring paper jams?	135
Clear paper jams in Tray 1 (13.A1)	136
Clear paper jams in Tray 2 (13.A2)	140
Clear jams in the fuser (13.B9, 13.B2, 13.FF)	145
Clear paper jams in the output bin (13.E1)	149
Clear jams in the duplex area (13.D3)	149
Clear paper jams in the 550-sheet trays (13.A3, 13.A4)	152
Clear paper jams in the 2 x 550 paper trays (13.A4, 13.A5)	159
Clear paper jams in the 2,700-sheet high-capacity input paper trays (13.A3, 13.A4, 13.A5, 13.A7)	165
Resolve print-quality problems	171
Introduction	171
Troubleshoot print quality	171
Update the printer firmware	171
Print from a different software program	171
Check the paper-type setting for the print job	171
Check the paper type setting on the printer	172
Check the paper type setting (Windows)	172
Check the paper type setting (macOS)	172
Check toner-cartridge status	172
Print a cleaning page	173
Visually inspect the toner cartridge or cartridges	173
Check paper and the printing environment	174
Step one: Use paper that meets HP specifications	174
Step two: Check the environment	174
Step three: Set the individual tray alignment	174
Try a different print driver	175
Troubleshoot color quality	175
Calibrate the printer to align the colors	175
Troubleshoot image defects	176
Solve wired network problems	185
Introduction	185
Poor physical connection	185
The computer is using the incorrect IP address for the printer	185
The computer is unable to communicate with the printer	186
The printer is using incorrect link and duplex settings for the network	186
New software programs might be causing compatibility problems	186
The computer or workstation might be set up incorrectly	186
The printer is disabled, or other network settings are incorrect	186