Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual page 159

Sub Logic Board (238X) <--> Printhead
CN3
Pin 1 HDU6
Pin 2 HDU8
Pin 3 HDD4
Pin 4 HDD2
Pin 5 HDD6
HDU2
Pin 6
Pin 7 HDU4
Pin 8 HDD8
Pin 9 HDD9
Pin 10 HDU1
Pin 11 HDD5
Pin 12 HDD1
Pin 13 HDD7
Pin 14 HDD3
Pin 15 HDU5
Pin 16 HDU9
Pin 17 HDU3
Pin 18 HDU7
Sub Logic Board (239X) <--> Printhead
CN8
Pin 1 HDP10
Pin 2 HDP8
Pin 3 HDP12
Pin 4 HDP6
Pin 5 HDP14
Pin 6 HDP4
Pin 7 COM
Pin 8 HDP2
Pin 9 COM
Pin 10 HDP1
Pin 11 COM
Pin 12 HDP3
Pin 13 COM
Pin 14 HDP5
Pin 15 HDP13
Pin 16 HDP7
Pin 17 HDP11
Pin 18 HDP9
CN9
Pin 1 HDP20
Pin 2 HDP18
Pin 3 HDP22
Pin 4 HDP16
Pin 5 HDP24
Pin 6 COM
Pin 7 THRMO
Pin 8 COM
Pin 9 THRMO
Pin 10 COM
Pin 11 HDP23
Pin 12 COM
Pin 13 HDP21
Pin 14 COM
Pin 15 HDP19
Pin 16 HDP15
Pin 17 HDP17
Printhead
Printhead
Connector Locations 5-19