Code :

Code: 50.1
Display: 50.1 FUSER ERROR
Description: AC power is not being provided to the fuser assembly. AC voltage is necessary to generate heat in the fuser assembly.
Remedy: 1. Verify that the fuser power cable at the back of the device is connected and the ECU is fully seated. 2. If the message persists, replace the fuser assembly.

Code: 50.6
Display: 50.6 FUSER ERROR
Description: The main or sub thermistors are unable to provide temperature feedback to the ECU. The main and sub thermistors monitor the fuser assembly hot-roller temperature and provide feedback to regulate the fusing temperature.
Remedy: 1. Verify that the seven-wire connector is firmly seated in connector J405 on the ECU. You might have to remove the main cooling fan to see this connection. 2. Verify that the four-wire connector at the rear of the device is firmly seated in the fuser assembly. 3. Verify that the AC voltage is being provided to the fuser assembly. 4. If the message persists, replace the fuser assembly.

Code: 51.XX
Display: 51.XY ERROR
Description: A device error has occurred.
Remedy: 1. Press "OK" to continue or press "?" for more information. 2. If the message persists after exiting help, turn the device off and then on. 3. If the message persists, contact HP Support.

Code: 52.00
Display: 52.00 ERROR
Description: A scanner motor error has occurred. Scanner motor rotation is verified at the initialization of a print job.
Remedy: 1. Verify that the scanner motor connector and the ribbon cable from the ECU are firmly seated on the laser/scanner assembly. 2. Verify that the scanner motor connector is firmly seated in connector J402 on the ECU. You might have to remove the main cooling fan to see this connection. 3. Verify that the ribbon cable installed in connector J403 on the ECU is fully seated You must remove the ECU in order to verify this connection. 4. If the message persists, replace the laser/scanner assembly.

Code: 54.XX
Display: 54.XX ERROR
Description: A device command error has occurred.
Remedy: 1. Turn the device off and then on. 2. If the message persists, contact HP support.

Code: 55.XX.XX
Display: 55.XX.YY DC CONTROLLER ERROR
Description: The engine is not communicating with the formatter.
Remedy: 1. Turn the device off and then on. 2. Verify that the flat ribbon cable between the ECU and the formatter PCA is connected correctly. 3. If the message persists, replace the ECU. If the message still persists, replace the formatter.

Code: 57.03
Display: 57.03 ERROR
Description: A sub cooling fan (FM2) error has occurred. Fan operation is verified during device powerup. Fan operation occurs only during powerup or during a print job.
Remedy: 1. Turn the device off and then on. 2. Verify that nothing is hindering or blocking the fan. 3. Verify that the fan is connected to connector J512 on the ECU PCA. You might have to remove the main cooling fan to see this connection. 4. If the message persists, replace the fan.

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