Lexmark Optra C710 Service Manual - Page 138

5016-001 Power Service Check Note: If any paper handling options, (250/250 tray or duplex unit), are installed, remove the option(s) and check the base printer for correct operation. If the base printer operates incorrectly, go to A. If the printer operates correctly, reinstall the options and go to B. Note: If the AC input cables attached to CN404 (A) or CN405 (B) are unplugged from the LVPS assembly, be sure they are reinstalled correctly. CAUTION: Observe all necessary precautions when removing and handling the circuit boards, or when checking the AC power wiring or FRUs. A Base printer with no paper handling options installed. FRU 1 Line Voltage 2 AC Line Cord 3 LVPS Fuses F401, F402 Action Check the AC line voltage. If the line voltage is incorrect, inform the customer. Check the line cord(s) for any signs of damage. • If incorrect, replace the cord. • If correct, check the continuity of the line cord and replace if necessary. Remove and check Fuses F401 and F402. If neither is blown, go to step 5. • If either or both fuses are blown, replace the fuse and turn the printer on. Verify the printer is operating properly. • If, after replacing either or both fuses and the power is turned on and neither fuses blow again, but the printer does not function properly, go to step 8. • If either fuse continues to blow, go to step 4. CAUTION: Before checking either fuse, turn the AC On/Off switch off and disconnect the AC power cord. 2-72 Service Manual