Lexmark Optra C710 Service Manual - Page 117

5016-001 Fuser Cold Service Check 922 Error - Fuser below maintenance count. Note: If selected, turn Power Saver off. Error codes 920, 921 and 922 may display for a cold fuser failure. A 920 fuser error caused by low line voltage may be cleared by turning the printer on and off. FRU 1 Fuser Assembly Fuser Lamp Circuit 2 Fuser Lamp Thermostat Fuser Lamp Contacts 3 Interlock Switches Action 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. 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. Go to the "Cover Interlock Service Check" on page 2-45. Diagnostic Information 2-51