Lexmark C540 Service Manual - Page 66

5025-2xx, 4xx Step Questions / actions Yes 5 Turn the printer on, and check the values at JBIN1: JBIN1 Pin Value 4 +5 V dc 5 +0 V dc (no media), +3.3 V dc (media) 6 Ground Are the values correct? Replace the fuser exit sensor. See "Fuser exit sensor removal" on page 4-30. Fuser service check No Replace the controller board. See "Controller board removal" on page 4-19. Step Questions / actions 1 Some low-voltage power supply FRUs have a voltage selector switch. If it does, the switch needs to be set to the correct voltage for your area. Yes Check the switch on the side of the LVPS to verify the correct voltage is set. No Go to step 2. Has the LVPS been changed? 2 Turn the printer off, and remove the rear shield. See "Rear shield removal" on page 4-11. Check the cable at JFUSES1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? 3 Check the connector JLVPS1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? 4 Check the power cable on the left side of the fuser and the thermistor cables and connections on the right side of the fuser. Are the cables or connectors damaged? Replace the fuser cable. Repair or replace the LVPS cable. Repair the cables. If the cables cannot be repaired, replaced the fuser. See "Fuser assembly removal" on page 4-26. Go to step 3. Go to step 4. Go to step 5. 2-32 Service Manual