Code :

Code: 50.1
Display: 50.1 Fuser error
Description: The fuser experienced a low-temperature error while printing or after it warmed up.
Remedy: 1. Remove any paper jams from the fuser area. 2. Reinstall the fuser. Check the connector (J1901) between the fuser and the product. Replace the cable or fuser if the connector is damaged. 3. Reconnect the connectors of the thermopile (J1990), fuser control PCA (J302, J305, J306, J309), and the DC controller PCA (J107). 4. Replace the fuser. 5. Replace the fuser power supply unit. 6. Replace the thermopile

Code: 50.2
Display: 50.2 Fuser error
Description: The fuser experienced a warm-up error.
Remedy: 1. Reinstall the fuser. Check the connector (J1901) between the fuser and the product. Replace the cable or fuser if the connector is damaged. 2. Reconnect the connectors of the thermopile (J1990), fuser control PCA (J302, J305, J306, J309), and the DC controller PCA (J107). 3. Replace the fuser. 4. Replace the fuser power supply unit. 5. Replace the thermopile

Code: 50.3
Display: 50.3 Fuser error
Description: The fuser experienced a high-temperature error.
Remedy: 1. Reinstall the fuser. Check the connector (J1901) between the fuser and the product. Replace the cable or fuser if the connector is damaged. 2. Reconnect the connectors of the thermopile (J1990), fuser control PCA (J302, J305, J306, J309), and the DC controller PCA (J107). 3. Replace the fuser. 4. Replace the fuser power supply unit. 5. Replace the thermopiler supply unit.

Code: 50.4
Display: 50.4 Fuser error
Description: There was an error with the fuser drive circuit.
Remedy: 1. Reconnect the connectors of the fuser control PCA (J305) and the DC controller PCA (J107). 2. If the product does not meet the power requirement of 40 to 70Hz frequency, the fuser temperature control will not work properly, which will cause a malfunction. 3. Check the low-voltage power supply unit for proper voltage. 4. Replace the fuser power supply unit.

Code: 50.5
Display: 50.5 Fuser error
Description: The fuser experienced a type-mismatch error.
Remedy: 1. Ensure that the fuser is the correct voltage. 2. Reinstall the fuser. Check the connector (J1901) between the fuser and the product. Replace the cable or fuser if the connector is damaged. 3. Reconnect the connectors of the fuser control PCA (J303, J305), low-voltage power supply unit (J6), and the DC controller PCA (J102, J207). 4. Replace the fuser.

Code: 50.7
Display: 50.7 Fuser error
Description: The fuser experienced a pressure-release mechanism error.
Remedy: 1. Reconnect the connectors of the fuser motor (J1720), fuser-unit home-position sensor (J1965), intermediate (J1964), and the DC controller PCA (J105, J121). 2. Test the fuser pressure-release sensor by performing the paper-path test or the manual sensor test in the Troubleshooting menu. 3. Check the sensor flag of the fuser pressure-release sensor. If the sensor flag is damaged, replace the fuser. 4. Check the inside gear on the product that drives the fuser. 5. Perform the fuser motor and fuser pressure-release motor component tests in the Troubleshooting menu. 6. Replace the fuser motor. 7. Replace the fuser