The line sensor has problems detecting media 5
Troubleshooting
The line sensor has problems detecting media
To resolve line sensor media detection problems, do the following:
1. Check the type of media that is being used since the Line sensor may have problems detecting trans-
parent media or some types of Non-HP media. Try loading white HP media in to the Printer and
check if the Line sensor detects it.
2. Excessive ink deposits on the Platen surface can fool the sensor by reflecting the light. Clean the
Center Platen.
3. Clean the Encoder Strip ⇒ See page 454.
4. The Line Sensor is not calibrated correctly. Perform the Line Sensor Calibration ⇒ See page 163.
5. The Line Sensor is damaged or faulty. Replace the Line Sensor ⇒ See page 390.
Troubleshooting Media Jams/Printhead Crashes
The failure modes “media jam” and “head crash” are grouped together because in many cases a media
jam causes the media to lift up into the Carriage path and cause a Printhead crash, thus causing many
media jam failures to be reported as head crashes.
1. Did the media jam occur when loading media?
• If the client has had media jams, it is common for pieces of media to get stuck in the media
path. Clear the media path.
2. Is the customer using non-HP media?
• The use of non-HP media can easily be the cause of media jams and head crashes (especially
head crashes because HP media is specially formulated to avoid cockle, one of the primary
causes of head crashes). If the media is not HP approved, advise the customer to use HP media
and check to see if the problem is now solved.
3. Check that the Vacuum Fan works correctly.
Troubleshooting shutdowns
If a shutdown occurs, you will get the message “Switch Power Off” followed by one of these messages:
• Check Maintenance Cartridge Path.
• Check Paper Path.
NOTE: If you are using HP Coated Media when the problem occurred, please also refer to
Page 1-6.
NOTE: When clearing a media jam, sometimes media is stuck in the paper path. To clear
this, you must lift the Media Lever and insert thicker media into the paper path to push out the
media that is still stuck there.
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