Description: Transfer Roll
Indicates a problem in the transfer roll area.
Remedy: 1 Transfer Roll Assembly Check the transfer roll for any signs of toner buildup, surface damage to the roll, oil or other contaminants on the surface of the roll. Replace the transfer roll as necessary. 2 Left Transfer Arm Assembly Check the left transfer roll arm assembly to make sure it is fastened and locked in the down position. If the arm is not locked down, check to ensure the arm is not broken and will lock into the EP frame correctly. Check the left transfer arm assembly spring for proper operation. 3 Right Transfer Arm Assembly Check the right transfer arm assembly to make sure it is fastened and locked in the down position. If the arm is not locked down, check to make sure the arm is not broken and will lock into the EP frame correctly. Check the right transfer arm assembly spring for proper operation. For any background problems, check to ensure the contact to the HVPS board is correct and that there is approximately 0 ohms resistance between the transfer roll shaft and the HVPS contact. 4 HVPS - 917 Error Code Check the voltage at J10-3. The voltage changes from +24 V dc with the printer idle to 0 V dc when the printer runs the print test. If the voltage is incorrect, check the continuity of line J10-3 in the front cable harness to the HVPS. If there is no continuity, replace the cable harness. If there is continuity, replace the HVPS. If the problem continues, replace the engine board.
Code: 920
Description: Fuser Error
Indicates that the fuser is below temperature when printing.
Remedy: 1 Fuser Lamp (Incorrect Lamp/925 Service Error) Install the correct voltage and wattage lamp or fuser assembly. 2 Fuser Lamp Remove the controller board. Run the Diagnostic Print Test and observe the lamp through the left side frame. If the lamp doesn’t come on, unplug the printer and check the continuity between the two pins on the fuser lamp cable going to the fuser assembly. If you do not measure continuity, remove the fuser assembly and check the continuity of the lamp. If incorrect, replace the lamp. If correct, replace the fuser cover assembly. 3 LVPS and AC Fuser Lamp Cable Turn the printer off. Disconnect the fuser lamp connector at the fuser assembly. Turn the printer on and check across the pins on LVPS end of the cable for line voltage. If incorrect, turn the printer off and disconnect the power cord and check the continuity of the AC fuser lamp cable. If incorrect, replace the cable. If correct, replace the LVPS. 4 Fuser Top Cover Assembly (Thermal Fuse/Thermistor Assembly) Disconnect the thermistor cable from the fuser board at J2. The resistance is as follows: HOT - J2-1 - J2-2 = 2.5K ohms COLD = 150K ohms to 260K ohms
Code: 921
Description: Fuser Error
Indicates that the fuser is below standby temperature when the printer is idle.
Remedy: 1 Fuser Lamp (Incorrect Lamp/925 Service Error) Install the correct voltage and wattage lamp or fuser assembly. 2 Fuser Lamp Remove the controller board. Run the Diagnostic Print Test and observe the lamp through the left side frame. If the lamp doesn’t come on, unplug the printer and check the continuity between the two pins on the fuser lamp cable going to the fuser assembly. If you do not measure continuity, remove the fuser assembly and check the continuity of the lamp. If incorrect, replace the lamp. If correct, replace the fuser cover assembly. 3 LVPS and AC Fuser Lamp Cable Turn the printer off. Disconnect the fuser lamp connector at the fuser assembly. Turn the printer on and check across the pins on LVPS end of the cable for line voltage. If incorrect, turn the printer off and disconnect the power cord and check the continuity of the AC fuser lamp cable. If incorrect, replace the cable. If correct, replace the LVPS. 4 Fuser Top Cover Assembly (Thermal Fuse/Thermistor Assembly) Disconnect the thermistor cable from the fuser board at J2. The resistance is as follows: HOT - J2-1 - J2-2 = 2.5K ohms COLD = 150K ohms to 260K ohms
Code: 922
Description: Fuser Error
Fuser failed to reach standby temperature.
Remedy: 1 Fuser Lamp (Incorrect Lamp/925 Service Error) Install the correct voltage and wattage lamp or fuser assembly. 2 Fuser Lamp Remove the controller board. Run the Diagnostic Print Test and observe the lamp through the left side frame. If the lamp doesn’t come on, unplug the printer and check the continuity between the two pins on the fuser lamp cable going to the fuser assembly. If you do not measure continuity, remove the fuser assembly and check the continuity of the lamp. If incorrect, replace the lamp. If correct, replace the fuser cover assembly. 3 LVPS and AC Fuser Lamp Cable Turn the printer off. Disconnect the fuser lamp connector at the fuser assembly. Turn the printer on and check across the pins on LVPS end of the cable for line voltage. If incorrect, turn the printer off and disconnect the power cord and check the continuity of the AC fuser lamp cable. If incorrect, replace the cable. If correct, replace the LVPS. 4 Fuser Top Cover Assembly (Thermal Fuse/Thermistor Assembly) Disconnect the thermistor cable from the fuser board at J2. The resistance is as follows: HOT - J2-1 - J2-2 = 2.5K ohms COLD = 150K ohms to 260K ohms
Code: 923
Description: Fuser Error
Fuser is too hot during printing or when printer is idle.
Remedy: 1 Fuser Cover Assembly (Assembly includes Thermistor and Thermal Fuses.) Check for damage to the thermistor assembly. Check the resistance of the themistor: HOT - J2-1 to J2-2 = 2.5K ohms COLD =150K ohms to 260K ohms Check the continuity from each pin of J2 to ground. If there is continuity, replace the fuser cover assembly 2 Engine Board Error code 924 indicates the engine board detects an open circuit in the thermistor circuit for the fuser assembly. The voltage on J2-6 on the engine board measures approximately +5 V dc. If incorrect, replace the engine board. If correct, check the continuity of the DC fuser cable connected between J2 on the engine board and J1 on the fuser control board. In there is no continuity, replace the cable. If there is continuity, check the voltage on J2-2 on the fuser control board. It measures approximately +5 V dc. If incorrect, replace the fuser control board. 3 Fuser Hot Roll Backup Roll Bearings Examine the fuser assembly for signs of overheating or damage. Check the hot roll and backup roll for signs of excessive toner, label glue, labels or other contaminants. If any are found, repair as necessary or replace the fuser assembly.
Code: 924
Description: Fuser Error
An open circuit has been detected in the Fuser Thermistor Circuit.
Remedy: 1 Fuser Cover Assembly (Assembly includes Thermistor and Thermal Fuses.) Check for damage to the thermistor assembly. Check the resistance of the themistor: HOT - J2-1 to J2-2 = 2.5K ohms COLD =150K ohms to 260K ohms Check the continuity from each pin of J2 to ground. If there is continuity, replace the fuser cover assembly 2 Engine Board Error code 924 indicates the engine board detects an open circuit in the thermistor circuit for the fuser assembly. The voltage on J2-6 on the engine board measures approximately +5 V dc. If incorrect, replace the engine board. If correct, check the continuity of the DC fuser cable connected between J2 on the engine board and J1 on the fuser control board. In there is no continuity, replace the cable. If there is continuity, check the voltage on J2-2 on the fuser control board. It measures approximately +5 V dc. If incorrect, replace the fuser control board. 3 Fuser Hot Roll Backup Roll Bearings Examine the fuser assembly for signs of overheating or damage. Check the hot roll and backup roll for signs of excessive toner, label glue, labels or other contaminants. If any are found, repair as necessary or replace the fuser assembly.