HP 1055CMHP - Manual (Page 18)

Troubleshooting
1-6
HP DesignJets 1050C and 1055CM Printers Service Manual
The Printer Continuously Rejects Printheads
1 Clean the flex contacts on the Printhead and in the Carriage
Assembly using the Carriage Interconnect Wiper (Refer to Chapter
3) 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 Systems Test
⇒
Page 4-5 .
Cover Sensors are not Working
1 Check if the faulty sensor is installed correctly.
2 Check if the cable for the faulty sensor 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 Excessive ink deposits on the Platen surface can fool the sensor by
reflecting the light. Clean the Platen.
3 The Line Sensor is not calibrated correctly. Perform the Line Sensor
calibration
⇒
Page 5-9.
4 The Line Sensor is damaged or faulty. Replace the Carriage
Assembly
⇒
Page 8-44.