HP L7400 User Manual Page 82
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Scanner did nothing
• Check the original
Make sure that the original is placed on the scanner glass correctly. For more
information, see
Load an original on the scanner glass.
• Check the device
The device might be coming out of PowerSave mode after a period of inactivity,
which delays processing a short while. Wait until the device reaches the READY
state.
Scan takes too long
• Check the settings
• If you set the resolution too high, the scan job takes longer and results in larger
files. To obtain good results when scanning or copying, do not use a resolution
that is higher than needed. You can lower the resolution to scan more quickly.
• If you acquire an image through TWAIN, you can change the settings so that
the original scans in black and white. See the onscreen Help for the TWAIN
program for information.
• Check the status of the device
If you sent a print or copy job before you tried to scan, the scan starts if the
scanner is not busy. However, the printing and scanning processes share memory,
which means that the scan might be slower.
Part of the document did not scan or text is missing
• Check the original
• Make sure that you loaded the original correctly. For more information, see
Load originals.
• Colored backgrounds can cause images in the foreground to blend into the
background. Try adjusting the settings before you scan the original, or try
enhancing the image after you scan the original.
• Check the settings
• Make sure that the input media size is large enough for the original that you
are scanning.
• If you are using the HP photo and imaging software, the default settings in the
HP photo and imaging software might be set to automatically perform a
specific task other than the one that you are attempting. See the onscreen
Help for the HP photo and imaging software for instructions about changing the
properties.
Chapter 8
78 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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