HP L7400 User Manual Page 64
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Calibrate the linefeed
• Control panel: Press the Setup button, select Tools, select Calibrate Linefeed,
and then press OK.
• Toolbox (Windows): Click the Services tab, and then click Calibrate Linefeed
and follow the onscreen instructions.
• HP Printer Utility (Mac OS): Click Calibrate Linefeed from the Information and
Support panel.
Clean the printheads
NOTE: Cleaning uses ink, so clean the printheads only when necessary.
The cleaning process takes up to 3.5 minutes. Some noise might be generated in
the process.
• Control panel: Press the Setup button, select Tools, and then select Clean
Printhead.
• Toolbox (Windows): Click the Services tab, and then click Clean Printheads
and follow the onscreen instructions.
• HP Printer Utility (Mac OS): Click Clean from the Information and Support panel.
Clean the printhead contacts manually
After the printheads are installed, you might get a control panel message telling you
the device will not print. If you receive this message, you might need to clean the
electrical contacts on the printheads and in the device.
CAUTION: Clean the electrical contacts only after you have attempted to clean
the printheads. Electrical contacts contain sensitive electronic components that can
be damaged easily. For more information, see
Clean the printheads.
To clean the printhead contacts manually
1. Open the top cover.
2. If the carriage does not move to the left automatically, press and hold the OK
button for five seconds. Wait for the carriage to stop moving, and then unplug the
power cord from the printer.
3. Lift the printhead latch.
Chapter 8
60 Maintain and troubleshoot
- HP Officejet Pro L7400 1
- All-in-One series 1
- One series 3
- Contents 5
- 1 Get started 10
- Understand the device parts 11
- Front view 12
- Printing supplies area 12
- Back view 13
- Connection information 14
- Install the accessories 15
- Chapter 2 16
- 12 Install the accessories 16
- 3 Use the device 18
- Change device settings 19
- Chapter 3 20
- 16 Use the device 20
- Load originals 21
- Select print media 22
- Load media 27
- 24 Use the device 28
- Configure trays 30
- Print borderless 32
- Print borderless 29 33
- Change print settings 34
- Perform duplexing 35
- Chapter 4 36
- 32 Print 36
- Cancel a print job 37
- Change the copy settings 38
- Set the number of copies 39
- Set the copy paper size 39
- Set the copy paper type 39
- Change copy speed or quality 40
- Chapter 5 42
- Cancel a copy job 43
- Scan an original 44
- Edit a scanned original 45
- Change scan settings 46
- Cancel a scan job 46
- 7 Configure and manage 47
- Use device management tools 48
- Toolbox (Windows) 49
- HP Printer Utility (Mac OS) 50
- HP Instant Support 51
- Chapter 7 52
- 48 Configure and manage 52
- Direct connection 54
- Configure the device (Mac OS) 56
- 54 Configure and manage 58
- 8 Maintain and troubleshoot 60
- Maintain the printheads 61
- Check printhead health 62
- Align the printheads 63
- Calibrate the linefeed 64
- Clean the printheads 64
- Chapter 8 66
- 62 Maintain and troubleshoot 66
- Replace the printheads 67
- Store printing supplies 68
- Clean the device 69
- Solve printing problems 70
- Blank or partial page printed 72
- 70 Maintain and troubleshoot 74
- Poor quality printouts 75
- Meaningless characters print 75
- Ink is smearing 76
- Solve paper-feed problems 77
- 74 Maintain and troubleshoot 78
- Solve copy problems 79
- Copies are blank 80
- Size is reduced 80
- Copy quality is poor 80
- Solve scan problems 81
- Scanner did nothing 82
- Scan takes too long 82
- Text cannot be edited 83
- Error messages appear 83
- Scanned image quality is poor 83
- Scan defects are apparent 84
- 82 Maintain and troubleshoot 86
- Clear jams 87
- 84 Maintain and troubleshoot 88
- Tips for avoiding jams 89
- HP supplies and accessories 90
- Printheads 91
- HP media 91
- Support and warranty 92
- Obtain electronic support 94
- Obtain HP telephone support 94
- Support process 95
- HP support by phone 95
- Phone support period 95
- Telephone support numbers 95
- Appendix B 96
- 92 Support and warranty 96
- Placing a call 97
- Additional warranty options 97
- 94 Support and warranty 98
- Pack the device 101
- Device specifications 103
- System requirements 104
- Environmental specifications 105
- Print specifications 105
- Copy specifications 105
- Scan specifications 105
- Electrical specifications 106
- Regulatory information 107
- FCC statement 108
- Notice to users in Korea 108
- RoHS notices (China only) 109
- LED indicator statement 109
- Regulatory model number 109
- Declaration of conformity 110
- Energy consumption 112
- Symbols/Numerics 113
- Podręcznik użytkownika 120
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