8 On On On On Front Panel (Light on) 1. Front Panel Front Panel on page 203 2. Formatter Formatter on page 296 3. Main PCA Electronics Module (Main PCA and PSU) on page 298 4. Front Panel Cable Front Panel on page 203 9 On On On On Off Front Panel Front Panel on page 203 Cover Sensors are not Working 1. Perform the Sensors Test Refer 5. Sensors on page 101 . 2. Check if 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 if the Line sensor detects it. 2. The Line Sensor is not calibrated correctly. Perform the Line Sensor Calibration Refer Line Sensor Calibration on page 146 . 3. The Line Sensor is damaged or faulty. Replace the Line Sensor Line Sensor on page 267 . Problems with Color Accuracy The Color Sensor (ESP) is a powerful tool unique to the Z series printers to maintain color accuracy. If you notice any problems with colors, perform the Color Sensor (ESP) calibration. Refer to Color Sensor (ESP) Calibration on page 149 .
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 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. 6 Chapter 1 Ink Supplies Troubleshooting & Print Quality ENWW