HP 6500 - E709a, 6500 - E709n, 6500

9 Maintain and troubleshoot
Work with ink cartridges..........................................................................................................	143
Information on ink cartridges and the printhead...............................................................	144
Check the estimated ink levels.........................................................................................	144
Replace the ink cartridges................................................................................................	145
Advanced ink cartridge maintenance...............................................................................	147
Clean the sensor........................................................................................................	148
Clean the sensor windows on the ink cartridges........................................................	149
Advanced printhead maintenance....................................................................................	151
Clean the printhead....................................................................................................	151
Align the printer..........................................................................................................	152
Usage information collection............................................................................................	153
Print and evaluate a print quality report..................................................................................	154
To print a print quality report.............................................................................................	154
To evaluate the Print Quality Diagnostic Page.................................................................	155
Ink Levels....................................................................................................................	155
Good color bars..........................................................................................................	155
Ragged, irregularly streaked, or faded bars...............................................................	156
Regular white streaks in the bars...............................................................................	157
Bar colors are not uniform..........................................................................................	157
Large Black Font Text................................................................................................	158
Alignment Patters.......................................................................................................	158
Clean the device.....................................................................................................................	159
Clean the scanner glass...................................................................................................	159
Clean the exterior.............................................................................................................	160
Clean the automatic document feeder..............................................................................	160
General troubleshooting tips and resources...........................................................................	163
Solve printing problems..........................................................................................................	164
The device shuts down unexpectedly...............................................................................	164
Error message appears on control-panel display.............................................................	165
Device takes a long time to print......................................................................................	165
Blank or partial page printed.............................................................................................	165
Something on the page is missing or incorrect.................................................................	166
Placement of the text or graphics is wrong.......................................................................	166
Print troubleshooting...............................................................................................................	167
Envelopes print incorrectly...............................................................................................	168
The product is not responding..........................................................................................	168
The product prints meaningless characters......................................................................	171
Nothing happens when I try to print..................................................................................	172
The margins are not printing as expected........................................................................	175
Text or graphics are cut off at the edge of the page.........................................................	176
A blank page came out while printing...............................................................................	178