Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual page 156

Main Logic Board <-->Carrier Motor
Main Logic Board <--> Paper Feed Motor
Sub Logic Board (238X-001) <--> Head Gap Sensor
5-16
CN9
Pin 1 CAD
Pin 2 CAC
Pin 3 CAB
Pin 4 CAA
Pin 5 CACOMB
Pin 6 CACOMA
Pin 1 LFD
Pin 2 LFC
Pin 3 LFB
Pin 4 LFA
Pin 5 LFCOMB
Pin 6 LFCOMA (Not used on Model 003)
Pin 7 (Not Used)
CN3
Pin 1 Aid Port
Pin 2 Gap
CN10