Description: 922 Fuser Error Indicates that the fuser temperature failed to increase.
Remedy: 1 Fuser Assembly Fuser Lamp Circuit Be sure the fuser assembly is correctly installed and locked down. Disconnect the AC power cord from the printer. Disconnect CN406 from the LVPS board and check for continuity between pins 1 and 2 on the CN406 cable connector. • If incorrect, go to step 2. • If correct, check the voltage between CN406 Pin 1 and 2. The voltage should read the same as the AC line voltage. • If incorrect replace the LVPS. 2 Fuser Lamp Thermostat Fuser Lamp Contacts Remove the fuser assembly from the printer. Note: Take care not to damage any pins when checking continuity. Check continuity between the two outer fuser lamp contacts of the autoconnector (HCU cable) located on the bottom of the fuser assembly. • If correct, go to step 3. • If incorrect, check the fuser lamp, thermostat, fuser lamp contacts and HCU cable, replacing any defective parts. 3 Interlock Switches Go to the “Cover Interlock Service Check”.
Code: 923, 924
Description: 923 Fuser Error Fuser is too hot during printing or when printer is idle. 924 Fuser Error Indicates that the system has detected that the thermistor is open.
Remedy: 1 Fuser: • Assembly • Hot Roll • Backup Roll Bearings Check the fuser assembly for signs of overheating or damage, especially the hot roll and backup roll. Also check for contaminants such as label glue or excessive toner buildup. • If contaminants are found, repair as necessary or replace the fuser assembly. • If damage from overheating is found, replace the fuser. 2 Thermistor Assembly Engine Board Check for a shorted thermistor by measuring across the connector located in the cable guide. • If the thermistor is shorted, replace the thermistor. • If replacing the failing thermistor does not fix the problem, replace the engine board. Check for signs of damage or contamination to the thermistor assembly. If no problem is found, check the resistance of the thermistor. Hot: CN18-1 to CN18-2: Approximately 2.0k - 2.5k ohms Cold: Approximately 150k to 250k ohms If incorrect, replace the thermistor. Check for an open in the thermistor circuit in the fuser assembly. Be sure the thermistor is properly connected to the thermistor cable in the bottom of the cable guide.
Code: 925
Description: Fuser Error
Remedy: Indicates that the fuser is below temperature when printing.
Code: 926
Description: Fuser Error
Remedy: Indicates that the fuser is below temperature and the system is detecting a thermistor short.
Code: 927
Description: Fuser Error
Remedy: Indicates that the fuser temperature failed to increase.
Code: 928
Description: Fuser Error
Remedy: Indicates that the fuser is too hot during printing, or when the printer is idling.