The printer continuously rejects printheads To resolve printhead rejection problems, do the following. 1. Clean the flex contacts on the Printhead and in the Carriage Assembly using the Carriage Interconnect Wiper (see Carriage Interconnect Wiper on page 87 ) and try again. 2. If all the Printheads are rejected (for each Printhead, the status message on the Front Panel does not show ' OK ') then perform the Carriage Assembly Test Carriage Assembly test on page 95 ..
Troubleshooting A new maintenance cartridge is incorrectly detected as ‘used’ This can occur if the printer has detected the previous Maintenance Cartridge was nearly full, and when a new Maintenance Cartridge is installed the Front Panel displays an error that the cartridge is ‘used’. To resolve the problem, manually reset the counter of the Maintenance Cartridge Reset Life Counters on page 112 . Cover sensors are not working To resolve cover sensor problems, do the following. 1. Check that the cable for the faulty sensor is not damaged and is connected correctly. 2. Replace the faulty sensor.
The Line Sensor has problems detecting paper To resolve Line Sensor paper detection problems, do the following. 1. Check the type of paper that is being used: the Line sensor may have problems detecting transparent paper or some types of Non-HP paper. Try loading white HP paper into the printer and check whether 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 Clean the Encoder Strip on page 464 . 4. The Line Sensor is not calibrated correctly. Perform the Line Sensor Calibration See Line Sensor calibration on page 129 . 5. The Line Sensor is damaged or faulty.
Replace the Line Sensor See Line Sensor Assembly on page 297 . How to remove the Left Hub when the actuator is broken You need a standard 90є Torx/Allen key(Torx T10 or Allen 2.5). 10 Chapter 2 Troubleshooting ENWW