Lexmark C510 Service Manual - Page 153

Cover open service check Step Questions / actions Yes 1 Turn printer off and remove Go to step 2. right cover. See "Right cover removal" on page 4-22. Check all interlock switch (top, rear and front) actuators for proper operation. Are actuators good? 2 Check each interlock Go to step 3. switches (top, rear and front) for proper operation and damage. Listen for switching action. Using an ohmmeter, check switches. When switch is open (cover open), resistance between pin 1 and pin 3 is 0 and pin 1 and 2 is infinite. Closing switch will show 0 resistance between pins 1 and 2 and infinite resistance between pins 1 and 3. Are switches good? 5021-0XX No Replace appropriate actuator: Front cover for front cover interlock switch. See "Front cover assembly removal" on page 4-19. Top cover assembly for top cover interlock switch. See "Top cover assembly removal" on page 4-18. Rear cover actuator for rear cover interlock switch. Actuator is contained in parts packet. Replace switch in question. See "Front door interlock switch removal" on page 4-29 for front interlock switch, see "Power supply fan removal" on page 4-74 for rear and top interlock switches. Diagnostic information 2-75