Lexmark C510 Service Manual - Page 124
I/O board. Check
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5021-0XX Step Questions / actions Yes No 5 If waste toner bottle is Replace Go to step 6. removed, reinsert it. developer motor. Ensure rear cover See "Developer assembly is shut. Override motor removal" top and front cover on page 4-31. interlock switches. For Go to step 8 location, see "Interlock switch locations" on page 5-8. Reconnect operator panel. Turn printer on. Allow printer to run until error posts. Disconnect connector from developer motor and check the following on disconnected cable connector: Pin 4 to pin 5-24VDC Pin 6 to pin 5-24VDC Pin 10 to pin 5-5VDC Are voltages present? 6 Remove I/O board shield. Go to step 7. See "I/O board removal" on page 4-70 for steps to remove I/O board shield. Disconnect DCN11 from I/O board. Check for continuity and shorted pins on cable that connects DCN11 to developer motor. Is cable okay? Replace cable. Retest printer. If error clears, problem solved, otherwise go to step 7. 2-46 Service Manual