Lexmark C540 Service Manual - Page 58

5025-2xx, 4xx Service checks 122.xx-Fuser temperature incorrect This service check covers fuser temperature errors, including 122.xx. Step Questions / actions Yes No 1 Check the clearance around the printer. See "Clearances" on page 1-5 or check the chart below: Description Dimensions Rear Front Right side Left side Above 102 mm (4 in.) 508 mm (20 in.) 152 mm (6 in.) 76 mm (3 in.) 254 mm (10 in.) Problem resolved. Make sure the proper clearance is maintained. Does the error clear? 2 Check the fuser connections on the fuser, at JFUSES1 on the controller board, and the AC connection at the LVPS. Are the connections correct? 3 Turn the printer on, and then check the following values at JFUSES1. JFUSES1 Pin Value 5 Between +0.6 V dc and +3.28 V dc 6 Ground 8 Ground 9 +3.3 V dc 10 Between +0.6 V dc and +3.15 V dc 11 Ground Are these values approximately correct? Replace the fuser. See "Fuser assembly removal" on page 4-26. Replace the fuser assembly. See "Fuser assembly removal" on page 4-26. Problem resolved. Replace the controller board. See "Controller board removal" on page 4-19. 90x.xx error Step Questions / actions 1 Turn the printer off, and remove the rear shield. See "Rear shield removal" on page 4-11. Check the cable connections. Are all the cable connections secure? Yes Replace the controller board. See "Controller board removal" on page 4-19. No Securely make all the connections. POR the printer. 2-24 Service Manual