Solving Print Quality Problems
Whenever a Print Quality problem appears, it is advisable to print the Diagnostic Print to help diagnose
the problem. The Diagnostic Print will help you differentiate between possible printhead errors and other
problems such as incorrect front-panel selection, driver or RIP configuration or mechanical problems.
The Front Panel is blank
See What to do if the Front Panel is blank on page 53.
The Printer does not power on
See What to do if the Front Panel is blank on page 53.
The Printer Continuously Rejects Printheads
1. Clean the flex contacts on the Printhead and in the Carriage Assembly using the Carriage
Interconnect Wiper and try again.
2. If all the Printheads are rejected (the status message on the Front Panel does not show "OK"
for all the Printheads) then perform the Electronic Module Test. See
Electronics Module Test
on page 98.
Cover Sensors are not Working
1. Perform the Sensors Test. See Sensors Test on page 105.
2. Check that the cable for the faulty sensor is not damaged and is connected correctly.
3. Replace the faulty Sensor.
The Line Sensor has Problems Detecting Media
1. Check the type of media that is being used since the Line sensor may have problems detecting
transparent media or some types of Non-HP media. Try loading white HP media in to the printer
and check that the Line sensor detects it.
2. The Line Sensor is not calibrated correctly. Perform the Line Sensor Calibration. See
Line Sensor
Calibration on page 147.
3. The Line Sensor is damaged or faulty. Replace the Line Sensor. See
Line Sensor on page 280.
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.
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.
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
4 Chapter 1 Troubleshooting ENWW
Troubleshooting
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