Code :

Code: 50.1
Display: 50.1 FUSER ERROR CYCLE POWER
Description: Indicates that a low temperature error has occurred in the fuser.
Remedy: 1 Verify the fuser is completely seated inside the printer. 2 Turn the printer off and on to reset the printer. 3 Turn the printer off and remove the fuser. Measure the resistance across fuser connectors J26F-A4 (FXTHU) and J26F-A3 (GND). If it is not in the range of 250 kOhms to 600 kOhms (room temperature), check the wiring from the connector J222 on the controller board up to the upper thermistor. If the wiring is normal, replace the fuser kit. 4 Reconnect connector J222 on the controller board and connector J26 on the fuser. 5 Replace the fuser kit. 6 Replace the power supply.

Code: 50.2
Display: 50.2 FUSER ERROR CYCLE POWER
Description: Indicates that a warmup error has occurred in the fuser.
Remedy: 1 Turn the printer off and on to reset the printer. 2 Verify the fuser is completely seated inside the printer. 3 Check for media jams in the fuser. 4 Replace the fuser kit.

Code: 50.3
Display: 50.3 FUSER ERROR CYCLE POWER
Description: Indicates that a high temperature error has occurred in the fuser. This error is saved in the controller board by an electrical charge in capacitor C259.
Remedy: 1 Turn the printer off and on to reset the printer. 2 Turn the printer off and unplug it. Place a flat blade of a screwdriver between the two wires of C259 to short out the capacitor and clear the memory. 3 Replace the fuser kit. 4 Replace the power supply. 5 Replace the controller board.

Code: 50.4
Display: 50.4 FUSER ERROR CYCLE POWER
Description: Indicates that a fuser drive or power unit error has occurred in the fuser.
Remedy: 1 Turn the printer off and on to reset the printer. 2 Verify the fuser is completely seated inside the printer. 3 Replace the fuser kit. 4 Replace the power supply. 5 Replace the controller board.

Code: 50.6
Display: 50.6 FUSER ERROR CYCLE POWER
Description: Indicates that a heater error has occurred in the fuser.
Remedy: 1 Turn the printer off and on to reset the printer. 2 Verify the fuser is completely seated inside the printer. 3 Reconnect connector J222 on the controller board, connector J26 on the fuser, and connector J101 on the power supply. 4 Replace the fuser kit. 5 Replace the power supply. 6 Replace the controller board.

Code: 51
Display: 51 LASER ERROR CYCLE POWER
Description: Indicates that a laser malfunction has occurred.
Remedy: 1 Turn the printer off and on to reset the printer. 2 Reconnect connector J1001 on the laser driver PCA and connector J205 on the controller board. 3 Reconnect connector J2 on the beam detect PCA, relay connector J40, and connector J211 on the controller board. 4 If the problem persists, replace the laser/ scanner unit. 5 If, after replacing the laser/scanner unit, the problem persists, replace the controller board.

Code: 52
Display: 52 SCANNER ERROR CYCLE POWER
Description: Indicates that the scanner motor is not turning properly.
Remedy: 1 Turn the printer off and on to reset the printer. 2 Reconnect connector J901 on the scanner motor PCA, relay connector J40, and connector J211 on the controller board. 3 Measure the voltage across connector J647- B11 (+24UH) and J647-4 (GND) on the main relay PCA after the printer is turned on. If the voltage is not 24 V, replace the power supply. 4 Measure the voltage across connector J211-7 (SCND) and J211-6 (GND) on the controller board after the printer is turned on. If the voltage changes from 0 V to 17 V or more, replace the laser/scanner unit. 5 Replace the laser/scanner unit. 6 Replace the controller board.