Lexmark Optra C710 Service Manual - Page 141

5016-001 FRU Action 8 LVPS Fuses The problem might be with any +24 V dc device, F401, F402 such as stepper motor, solenoid or clutch either or both connected to the engine board. Remove and continue to blow replace one FRU at a time until you find the after being failing component. replaced. (Continued) Note: A shorted motor, case to winding short, may also damage the engine board. It may be necessary to replace both the motor and the board. 9 AC Input Receptacle Check the AC input receptacle for signs of damage. • If damage is found, replace the receptacle. • If no damage is found, go to step 10. 10 AC receptacle to AC On/Off Wiring. Check that the wiring is correctly installed and connected to the AC input receptacle and the AC On/Off switch. Check the wiring for signs of damage. • If correct, check the blue and gray wires for continuity and go to step 11. • If incorrect, replace the faulty cable. 11 AC On/Off Switch LVPS to AC On/Off Switch Wiring Check the wiring from the LVPS to the AC On/Off switch verifying it is installed properly and not damaged. If incorrect, replace the switch. Diagnostic Information 2-75