Lexmark 5021-0XX - Manual (Page 301)

Repair information 4-71
5021-0XX
4. Remove six screws (B) from I/O board; remove I/O board.
Note: When reinstalling flat cables, ensure blue side of cable is
opposite pins on connectors DCN1 and DCN3. Flat cable pins are
exposed on only one side (opposite blue side) and must make
contact with metal pins on connectors.
DCN13 12
DCN14 16
DCN15 12
DCN16 14
DCN17 N/A
DCN18 3
DCN19 10
DCN20 3
DCN21 4
DCN22 4 Do not remove the jumper.
Connector Number of pins Cable wire colors