Lexmark C510 Service Manual - Page 156

5021-0XX Incorrect media service check Step Questions / actions Yes No 1 Turn printer off and remove Go to step 2. I/O board shield. See "I/O board removal" on page 4-70 for steps to remove I/O board shield. Is cable properly connected to I/O board connector DCN16? Properly connect cable. 2 Reconnect operator panel. Go to step 3. Turn printer on. Touch negative lead of voltmeter to metal bracket that holds I/O board to obtain ground. Touch positive lead to DCN16 pin 10 to ensure 5 VDC is being supplied to toner present sensor. Is 5 VDC present? Go to step 6. 3 Remove tray from printer. Go to step 4. Remove paper from tray and insert 1 sheet of transparency. Insert paper tray into printer. Check voltage level on DCN16 pin 11. Voltage should measure approximately 4.6 VDC. Is voltage okay? Go to step 5. 4 Remove tray from printer. Replace I/O Go to step 5. Remove transparency from tray and insert white paper. Insert paper tray into printer. Check voltage level on DCN16 pin 11. Voltage should measure approximately 1.7 VDC. Is voltage okay? board. See "I/O board removal" on page 4-70. If problem persists, replace engine controller board. See "Engine controller board removal" on page 4-55. 2-78 Service Manual