HP 1055CM Cover Sensors are not Working, The Printer Continuously Rejects Printheads, The Line Sensor has Problems Detecting Media

Troubleshooting

The Printer Continuously Rejects Printheads

1Clean the flex contacts on the Printhead and in the Carriage Assembly using the Carriage Interconnect Wiper (Refer to Chapter 3) and try again.

2If 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

1Check if the faulty sensor is installed correctly.

2Check if the cable for the faulty sensor is connected correctly.

3Replace the faulty Sensor.

The Line Sensor has Problems Detecting Media

1Check 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.

2Excessive ink deposits on the Platen surface can fool the sensor by reflecting the light. Clean the Platen.

3The Line Sensor is not calibrated correctly. Perform the Line Sensor calibration ⇒ Page 5-9.

4The Line Sensor is damaged or faulty. Replace the Carriage Assembly ⇒ Page 8-44.

1-6 HP DesignJets 1050C and 1055CM Printers Service Manual