Lexmark C510

Error Code:

Code: 994
Description: OPC belt marker sensor error
Remedy: 1 Remove photodeveloper cartridge and observe markers on side. Are belt markers covered with foreign particles? Clean marker area with cotton cloth. If problem persists go to step 2. Go to step 2.
2 Reinstall photodeveloper cartridge. Turn printer off and remove I/O board shield. Are cables DCN5 and DCN13 properly connected to I/O board? Go to step 3. Properly connect cables. If problem persists, go to step 3.
3 Ensure rear cover assembly and front cover assembly are closed. Override top interlock switch and turn printer on. Wait until printer displays error and remove DCN5 from I/O board. Check for 5 VDC between DCN5 pin 1 (on I/O board) and ground (you can touch negative lead of voltmeter to metal bracket that holds I/O board to obtain ground.) Is voltage present and correct? I/O board is providing 5 VDC to marker sensor. Replace OPC marker sensor. If problem persists, replace engine controller board. Go to step 4.
4 Reconnect DCN5 and disconnect cable from DCN13. On cable, check for 5 VDC from pin 11 to ground (you can touch negative lead of voltmeter to metal bracket that holds I/O board to obtain ground.) Is voltage present and correct? LVPS is providing 5 VDC to I/O board. Replace faulty I/O board. Replace LVPS.

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