Lexmark C510 Service Manual - Page 127
Remove I/O board shield., Disconnect DCN12
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5021-0XX Step Questions / actions Yes 6 If waste toner bottle is Replace main removed, reinsert it. motor. See Ensure rear cover "Main motor assembly cover is shut. assembly Override top and front removal" on cover interlock switches. page 4-38. Go For location, see to step 9. "Interlock switch locations" on page 5-8. Reconnect operator panel. Turn printer on. Allow printer to run until error posts. Disconnect connector from main 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? 7 Remove I/O board shield. Go to step 8. See "I/O board removal" on page 4-70 for steps to remove I/O board shield. Disconnect DCN12 from I/O board. Check for continuity and shorted pins on cable that connects DCN12 to main motor. Is cable okay? No Go to step 7. Replace cable. Retest printer. If error clears, problem solved, otherwise go to step 8. Diagnostic information 2-49