HP 2830, 2840, 2820 manual Troubleshooting

Removing the fuser motor	222
Removing the carousel-engagement motor	223
Removing the air duct and fan	223
Printed circuit assemblies (PCAs)	225
Removing the sub-high-voltage transformer PCA	225
Removing the high-voltage transformer PCA	226
Removing the low-voltage PCA	226
Trays	229
Removing tray 1 (multipurpose tray)	229
Removing optional tray 2 (250-sheet tray)	230
Removing the optional tray 2 pickup roller	233
Replacing the optional tray 2 separation pad	235
6 Troubleshooting
Support strategy	238
Troubleshooting process	239
Troubleshooting checklist	239
Control-panel messages	244
Alert and warning messages	244
Critical error messages	253
Clearing jams	256
Media jams occur in the device	256
Tips to avoid media jams	256
Where to look for jams	256
To clear a media jam inside the device	257
To clear output area jams	258
Media jams occur in the automatic document feeder (ADF)	260
To clear a media jam from the automatic document feeder (ADF)	260
Print problems	263
Print quality problems	263
Improving print quality	263
Understanding print-quality settings	263
To temporarily change print-quality settings	263
To change print-quality settings for all future jobs	263
Identifying and correcting print defects	263
Print-quality checklist	264
General print quality issues	265
Solving issues with color documents	271
Media-handling problems	272
Print-media guidelines	272
Solving print-media problems	273
Performance problems	274
Scan problems	276
Solving scanned image problems	276
Scan quality problems	277
Preventing problems	277
Solving scan-quality problems	278
Scan-specific error messages	279
Copy problems	280
Preventing problems	280

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