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HP 2840 HP Color LaserJet 2820/2830/2840 All-In-One - User Guide - Page 265

Scan quality problems, Preventing problems

UPC - 829160742731

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Problem The scan takes too long Cause Solution The resolution or color level is set too high. Change the resolution and color level settings to the correct settings for your job. See Scanner resolution and color. The software is set to scan in color. The system default is color, which takes longer to scan even when scanning a monochrome original. If you acquire an image through TWAIN or WIA, you can change the settings so that the original scans in grayscale or black-and-white. See the device software Help for details. A print job or copy job was sent before you tried to scan. If someone sent a print job or copy job before you tried to scan, the scan will start if the scanner is not busy. However, because the printer and scanner share memory, the scan might be slower. Scan quality problems This section provides information about improving scan quality by preventing or correcting problems. Preventing problems The following are a few simple steps you can take to improve copy and scan quality. ● Use the flatbed scanner, rather than the automatic document feeder (ADF) input tray, to scan. ● Use high-quality originals. ● Load the media correctly. If the media is loaded incorrectly, it might skew, which causes unclear images. See Loading trays for instructions. ● Adjust the software settings according to how you plan to use the scanned page. See Scanner resolution and color for more information. ● If your device frequently feeds more than one page at a time, the separation pad might need to be replaced. Contact HP Customer Care. See Service and support or the flyer that came in the printer box. ● Use or make a carrier sheet to protect your originals. ENWW Scan problems 249

Section	Page
Device basics	17
Quick access to device information	18
User guide links	18
Where to look for more information	18
Device configurations	20
HP Color LaserJet 2820 all-in-one	20
HP Color LaserJet 2830 all-in-one	20
HP Color LaserJet 2840 all-in-one	21
Device features	22
Device parts	25
Front view	25
Back view	25
Interface ports	26
Control panel	27
Software	29
Printer drivers	30
Software and supported operating systems	30
Software tips	31
Software for Windows	32
Software for Macintosh	33
HP Toolbox	33
Embedded Web server (EWS)	34
Software installation	34
Uninstalling the printing software	36
Using Add or Remove Programs to uninstall	36
Uninstalling software for Macintosh	36
Media specifications	37
General guidelines	38
Supported media weights and sizes	39
Printing and storage environment	41
Using the device	43
Loading trays	44
Loading tray 1	44
Loading optional tray 2	45
Loading documents to scan	46
Using the device control panel	48
Changing the device control-panel display language	48
Changing the default media size	48
Using the device volume controls	49
Printing	53
Printing from Windows	54
To print from Windows	54
Printing from the Macintosh OS	55
To print from the Macintosh OS	55
Printer drivers	56
Using the PCL printer-driver Help (Windows only)	56
Selecting a source	56
Selecting a type or size	56
Printing in grayscale	57
Creating and using watermarks	57
Printing multiple pages on one sheet of paper (N-up printing)	57
Creating and using Quick Sets	57
Reducing or enlarging (Fit to Page)	58
Maximizing print speed for letter-size paper	59
Selecting an output location	60
Setting a custom paper size	61
Printing on special media	62
Glossy paper	62
Colored paper	62
Preprinted forms and letterhead	62
Envelopes	63
Heavy paper	63
HP LaserJet Tough paper	64
Labels	64
Transparencies	64
Printing on different paper for the first page	65
Printing on both sides (duplexing manually)	66
To duplex manually	66
Printing booklets	67
To print booklets	67
Canceling a print job	69
Printing with color	71
Changing the color settings	72
Using color	73
Media selection	73
HP ImageREt 2400	73
Managing color options	74
Print in Grayscale	74
Automatic versus Manual color adjustment	74
Manual color options	74
Matching colors	76
Copy	77
Starting a copy job	78
Canceling a copy job	79
Adjusting the copy quality	80
To adjust the copy quality for the current job	80
To adjust the default copy quality	80
Adjusting the lighter/darker (contrast) setting	81
To adjust the lighter/darker setting for the current job	81
To adjust the default lighter/darker setting	81
Reducing or enlarging copies	82
To reduce or enlarge copies for the current job	83
To change the default copy size	84
Changing the copy-collation setting	85
To change the default copy-collation setting	85
Changing the number of copies	86
To change the number of copies for the current job	86
To change the default number of copies	86
Copying photos, two-sided originals, or books	87
To copy a photo	87
To copy a multiple-page stack of two-sided originals	87
To copy a book	88
Fax	89
Specifying the fax settings	91
To enter text from the control panel	91
To set the time and date	92
To set the fax header	92
Sending faxes	93
To adjust the resolution for the current fax job	93
To send a fax to one recipient	93
To send a fax to multiple recipients	94
To send a fax by using a group-dial entry	94
To send a fax to a group manually (ad hoc faxing)	95
Using manual dial	96
To use manual dial with the automatic document feeder (ADF)	96
To use manual dial with the flatbed scanner	96
Redialing manually	97
To redial manually	97
Canceling a fax job	98
To cancel the current fax job	98
To cancel a fax job by using the Fax Job Status	98
Sending faxes by using the software	99
To send a fax from the software (Windows 2000 or XP)	99
To send a fax from the software (Mac OS 10.2 or 10.3)	99
To send a fax from a third-party application, such as Microsoft Word (all operating systems)	100
Receiving faxes	101
To receive faxes when you hear fax tones	101
Sending a fax by dialing from a telephone	102
To send a fax by dialing from a telephone	102
Changing the default light/dark (contrast) setting	103
To change the default light/dark (contrast) setting	103
Changing the default resolution setting	104
To change the default resolution setting	104
Changing the default glass-size setting	105
To change the default glass-size setting	105
Selecting tone-dialing or pulse-dialing mode	106
To select tone-dialing or pulse-dialing	106
Changing the redial settings	107
To change the redial-on-busy option	107
To change the redial-on-no-answer option	107
To change the redial-on-communication-error option	107
Receiving faxes to your computer	108
To turn off the receive-to-PC setting from the control panel	108
Setting the answer mode	109
To set the answer mode	109
Changing ring patterns for call answering	110
To change ring patterns for call answering	110
Changing the rings-to-answer setting	111
Using the rings-to-answer setting	111
To set the number of rings-to-answer	111
Changing autoreduction settings for incoming faxes	112
To change autoreduction for incoming faxes	112
Blocking or unblocking fax numbers	113
To block or unblock a fax number	113
About speed-dial entries, one-touch keys, and group-dial entries	114
To program speed-dial entries and one-touch keys	114
To delete speed-dial entries and one-touch keys	115
To program speed-dial entries or one-touch keys quickly	115
To manage group-dial entries	115
Using dialing characters	118
To insert a pause	118
Inserting a dial prefix	119
To set the dial prefix	119
Sending a delayed fax	120
To send a delayed fax	120
Changing the detect-dial-tone setting	121
To change the detect-dial-tone setting	121
Using billing codes	122
To change the billing-code setting	122
To use billing codes	122
Reprinting a fax	123
To reprint a fax	123
To change the fax reprint settings	123
Deleting faxes from memory	124
To delete faxes from memory	124
Using fax forwarding	125
To use fax forwarding	125
Making an extension telephone available to receive faxes	126
To make an extension telephone available to receive faxes	126
Using fax polling	127
To poll (request a fax from) another fax machine	127
Changing the silence-detect mode	128
To change the silence-detect mode	128
Creating stamp-received faxes	129
To make stamp-received faxes available	129
Setting the fax-error-correction mode	130
To change the error-correction setting	130
Changing the V.34 setting	131
To change the V.34 setting	131
Scan	133
Understanding scanning methods	134
Scanning from the device control panel (Windows)	135
Programming the device Scan to button	135
Scanning to e-mail	135
Scanning to a folder	135
Canceling a scan job	137
Scanning by using HP Director (Windows)	138
To view HP Director	138
Scanning from the device and HP Director (Macintosh)	139
Scanning to e-mail	139
Scanning to a file	140
Scanning to a software program	140
Using page-by-page scanning	141
Scanning by using TWAIN-compliant and WIA-compliant software	142
Using TWAIN-compliant and WIA-compliant software	142
Scanning a photo or a book	143
Scanning a photo	143
Scanning a book	143
Scanning by using optical character recognition (OCR) software	145
Readiris	145
Scanner resolution and color	146
Resolution and color guidelines	146
Color	147
Photo	149
Inserting a memory card	150
Changing default settings	151
Changing job settings	152
Printing photos directly from the memory card	153
Printing photos from a proof sheet	154
Printing an index	155
How do I?	157
Print: How do I?	158
Print on special media, such as glossy or photo paper	159
Print on both sides of the paper	160
Print on envelopes and custom media sizes	160
Change the device print settings, such as volume or print quality, in HP Toolbox	161
Print color documents from my computer in black and white only	162
Network: How do I?	163
Set up the device and use it on the network	163
Set my network password	165
Photo: How do I?	166
Print a particular photo from a memory card	166
Print all the photos that are stored on a memory card	166
Enable or disable memory cards	166
Use a proof sheet	167
Save photos from a memory card to my computer	167
Copy: How do I?	168
Change the copy settings, such as number of copies, in HP Toolbox	168
Reduce or enlarge an original	168
Fax: How do I?	169
Send a fax from the device	169
Change the fax send or receive settings, such as answer mode, in HP Toolbox	169
Create a fax cover page	170
Send a fax from my computer	171
Receive faxes to my computer	172
Set up speed dials	173
Forward received faxes to another fax number	173
View and print previously received faxes	174
Add or delete a contact	174
Import contacts from another source	175
Create a new group list	176
Create a new group list	176
Change settings, such as resolution and contrast, and optimize them for each fax	176
Scan: How do I?	178
Scan from the device control panel	178
Set up the Scan to button on the control panel	178
Save a scan to a folder on my computer	178
Send a scan to an e-mail message	179
Add or edit e-mail addresses for scanning to e-mail	179
Add or edit folders for scanning to a folder	179
Other: How do I?	181
Receive toner warnings from the device at my computer	181
Receive toner warning e-mail messages from the device	181
Maintain the device	181
View the control-panel menu items for the device	182
Replace print cartridges	182
Replace the imaging drum	184
Clear jams	186
Order new supplies	191
Managing the device and maintenance	193
Information pages	194
Demo page	194
Usage page	194
Configuration page	194
Supplies Status page	195
HP Toolbox	197
To view HP Toolbox	197
Status tab	198
Fax tab	198
Scan to tab	198
Troubleshooting tab	199
Documentation tab	199
Device Settings pages	200
HP Toolbox links	201
Other links	201
Macintosh Configure Device (Mac OS 10.2 and 10.3)	202
To view Macintosh Configure Device	202
Embedded Web server	203
Features	203
Fax logs and reports	204
Printing the fax activity log	204
Printing a fax call report	204
Setting print times for the fax call report	205
Including the first page of each fax on the fax call report	206
Printing a phone book report	206
Printing the billing-code report	206
Printing the block-fax list	206
Printing all fax reports	207
Cleaning the device	208
To clean the exterior	208
To clean the scanner glass	208
To clean the lid backing	208
Cleaning the paper path	209
Changing the automatic document feeder (ADF)	211
To change the ADF	211
Changing the automatic document feeder (ADF) pickup roller assembly	213
To change the ADF pickup roller assembly	213
Cleaning the automatic document feeder (ADF) pickup roller assembly	215
To clean the ADF pickup roller assembly	215
Managing supplies	217
Checking status and ordering supplies	218
To check status and order supplies by using the control panel	218
To check status and order supplies by using HP Toolbox	218
Storing supplies	219
Replacing and recycling supplies	220
HP policy on non-HP supplies	221
Resetting the printer for non-HP supplies	221
HP fraud hotline	222
Changing a print cartridge	223
To replace a print cartridge	223
Changing the imaging drum	225
To change the imaging drum	225
Troubleshooting	227
Support strategy	228
Troubleshooting process	229
Troubleshooting checklist	229
Control panel messages	233
Alert and warning messages	233
Critical error messages	241
Clearing jams	244
Media jams occur in the device	244
Media jams occur in the automatic document feeder (ADF)	247
Print problems	250
Print quality problems	250
Media-handling problems	259
Performance problems	261
Scan problems	263
Solving scanned image problems	263
Scan quality problems	265
Copy problems	267
Preventing problems	267
Image problems	267
Media-handling problems	268
Performance problems	270
Fax problems	272
Problems receiving faxes	272
Problems sending faxes	275
Voice call problems	277
Media-handling problems	277
Performance problems	279
Memory card problems	280
Missing or wrong files	280
Index page not printing	280
Proof sheet not printing	280
Proof sheet not scanning	281
Issues with photo printing	281
Troubleshooting tools	284
Device pages and reports	284
Fax reports	284
HP Toolbox	286
Service menu	286
The device control panel display has black lines or dots, or becomes blank	288
Accessories and ordering information	289
Supplies	290
Memory	291
Cable and interface accessories	292
Paper-handling accessories	293
Paper and other print media	294
User-replaceable parts	295
Supplementary documentation	296
Service and support	297
Hewlett-Packard limited warranty statement	297
Print Cartridge and Imaging Drum Limited Warranty Statement	299
Color LaserJet Image Fuser Kit and Image Transfer Kit Limited Warranty Statement	300
Availability of support and service	301
HP maintenance agreements	301
Onsite service agreements	301
Device specifications	303
Regulatory information	305
Introduction	305
Telephone Consumer Protection Act (United States)	306
IC CS-03 requirements	307
EU statement for telecom operation	308
New Zealand telecom statements	309
Environmental Product Stewardship program	310
Ozone production	310
Energy consumption	310
HP LaserJet printing supplies	310
Nederlands	311
Taiwan	312
Declaration of conformity	313
Declaration of conformity	314
Country-/region-specific safety statements	315
Laser safety statement	315
Canadian DOC statement	315
Korean EMI statement	315
Finnish laser statement	316
Glossary	317