HP PRO L7500 10

10 Maintain and troubleshoot
Supported ink cartridges .......................................................................................................	143
Replace the ink cartridges ....................................................................................................	144
Maintain the printheads ........................................................................................................	145
To check printhead health ..............................................................................................	145
To print the print quality diagnostic page ........................................................................	145
To align the printheads ...................................................................................................	146
To calibrate the linefeed .................................................................................................	147
To clean the printheads ..................................................................................................	147
To clean the printhead contacts manually ......................................................................	147
To replace the printheads ...............................................................................................	150
Store printing supplies ..........................................................................................................	152
Store ink cartridges .........................................................................................................	152
Store printheads .............................................................................................................	152
Clean the device ...................................................................................................................	152
Clean the scanner glass .................................................................................................	153
Clean the automatic document feeder (ADF) ..................................................................	153
Clean the exterior ...........................................................................................................	157
Troubleshooting tips and resources ......................................................................................	157
Solve printing problems ........................................................................................................	158
The device shuts down unexpectedly .............................................................................	158
Error message appears on control-panel display ............................................................	158
The device is not responding (nothing prints) .................................................................	158
Device does not accept printhead ...................................................................................	159
Device takes a long time to print .....................................................................................	160
Blank or partial page printed ...........................................................................................	160
Something on the page is missing or incorrect ...............................................................	161
Placement of the text or graphics is wrong .....................................................................	161
The device prints half a page, then ejects the paper ......................................................	162
Poor print quality and unexpected printouts ..........................................................................	162
Poor quality printouts ......................................................................................................	162
Meaningless characters print ..........................................................................................	163
Ink is smearing ................................................................................................................	163
Ink is not filling the text or graphics completely ...............................................................	164
Output is faded or dull colored ........................................................................................	164
Colors are printing as black and white ............................................................................	164
Wrong colors are printing ................................................................................................	164
Printout shows bleeding colors .......................................................................................	165
Colors do not line up properly .........................................................................................	165
Lines or dots are missing from text or graphics ..............................................................	165
Solve paper-feed problems ...................................................................................................	165
Optional Tray 2 cannot be inserted .................................................................................	165
Another paper-feed problem is occurring ........................................................................	165