HP PageWide XL 4700 User Guide 1 - Page 151

Line discontinuities, skewed during the scan. If so, see

Get HP PageWide XL 4700 PDF manuals and user guides View all HP PageWide XL 4700 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 151 highlights

Actions 1. Re-scan the original, setting the content type to Image, and contrast and background cleaning to zero. 2. If the problem persists, re-scan the original at a lower scanner resolution (Standard quality if scanning, Fast or Normal if copying). It may also help to flatten the original manually as much as possible before scanning it again. NOTE: The problem of wrinkles cannot always be solved, due to the technological limitations of CIS technology. HP offers HD Scanners with CCD technology for higher quality requirements. If the wrinkles remain after the corrective actions explained above, then no further action can be taken to improve the image quality, except to buy a more expensive CCD scanner. Line discontinuities When scanning or copying large originals, you may sometimes find that a straight line (not necessarily horizontal) appears with discontinuities or small steps. Note the black arrow indicating the scanning direction in this example. Actions 1. Repeat the scan, preferably using a higher resolution, and this time make sure that the product is correctly positioned (it is flat on the floor and it does not move), and that the printer is not printing while you scan. Turning the original 90 or 180° and scanning it again may also solve the problem. 2. If the problem persists, check that the original to be scanned is not skewed, and that it does not become skewed during the scan. If so, see Incorrect paper advance, skew during scanning, or horizontal wrinkles on page 149. You might also want to deactivate the automatic de-skew algorithm as indicated in Copied or scanned image is very skewed on page 152. 3. If there is no skew but the problem persists, clean and calibrate the scanner as indicated in Maintenance on page 178. Take care not to move the printer during the calibration (the printer should not be printing during scanner calibration), and check that the maintenance sheet is correctly positioned before starting the calibration. Also check that the maintenance sheet is not damaged before calibrating the scanner (an old or damaged maintenance sheet may cause this problem); if it is damaged, call your service representative and ask for a new maintenance sheet. ENWW Scanner troubleshooting 145

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
Actions
1.
Re-scan the original, setting the content type to
Image
, and contrast and background cleaning to zero.
2.
If the problem persists, re-scan the original at a lower scanner resolution (Standard quality if scanning, Fast
or Normal if copying). It may also help to flatten the original manually as much as possible before scanning
it again.
NOTE:
The problem of wrinkles cannot always be solved, due to the technological limitations of CIS technology.
HP offers HD Scanners with CCD technology for higher quality requirements. If the wrinkles remain after the
corrective actions explained above, then no further action can be taken to improve the image quality, except to
buy a more expensive CCD scanner.
Line discontinuities
When scanning or copying large originals, you may sometimes find that a straight line (not necessarily
horizontal) appears with discontinuities or small steps.
Note the black arrow indicating the scanning direction in this example.
Actions
1.
Repeat the scan, preferably using a higher resolution, and this time make sure that the product is correctly
positioned (it is flat on the floor and it does not move), and that the printer is not printing while you scan.
Turning the original 90 or 180° and scanning it again may also solve the problem.
2.
If the problem persists, check that the original to be scanned is not skewed, and that it does not become
skewed during the scan. If so, see
Incorrect paper advance, skew during scanning, or horizontal wrinkles
on page
149
. You might also want to deactivate the automatic de-skew algorithm as indicated in
Copied or
scanned image is very skewed
on page
152
.
3.
If there is no skew but the problem persists, clean and calibrate the scanner as indicated in
Maintenance
on page
178
. Take care not to move the printer during the calibration (the printer should not be printing
during scanner calibration), and check that the maintenance sheet is correctly positioned before starting
the calibration. Also check that the maintenance sheet is not damaged before calibrating the scanner (an
old or damaged maintenance sheet may cause this problem); if it is damaged, call your service
representative and ask for a new maintenance sheet.
ENWW
Scanner troubleshooting
145