Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual page 154

Main Logic Board <--> Sub Logic Board (Model - 002, 003)
23XX-002, 003
Main Logic Board
CN3
Pin 1 SCLK
Pin 2 LEDD
Pin 3 SWD
Pin 4 SW LTCH
Pin 5 GAP SW
Pin 6 PUL CSF
Pin 7 HP
Pin 8 THRMO
Pin 9 HD8
Pin 10 HD6
Pin 11 HD4
Pin 12 HD2
Pin 13 HD1
Pin 14 HD3
Pin 15 HD5
Pin 16 HD7
Pin 17 HD9
Pin 18 HD11
Pin 19 HD13
Pin 20 HD15
Pin 21 HD17
Pin 22 HD18
Pin 23 HD16
Pin 24 HD14
Pin 25 HD12
Pin 26 HD10
Pin 27 HD21
Pin 28 MSW
Pin 29 HDCOM
Pin 30 HD19
HD23
Pin 31
Pin 32 HD24
Pin 33 HD22
Pin 34 HD20
5-14
238X-002, 003
Sub Logic Board
CN2
Pin 28 SCLK
Pin 27 LEDD
Pin 26 SWD
Pin 25 SW LTCH
Pin 24 GAP SW
Pin 23 PUL CSF
Pin 22 HP
Pin 21 THRMO
Pin 20 HD8
Pin 19 HD6
Pin 18 HD4
Pin 17 HD2
Pin 16 HD1
Pin 15 HD3
Pin 14 HD5
Pin 13 HD7
Pin 12 HD9
Pin 11 HD11
Pin 10 HD13
Pin 9 HD15
Pin 8 HD17
Pin 7 HD18
Pin 6 HD16
Pin 5 HD14
Pin 4 HD12
Pin 3 HD10
Pin 2 HD21
Pin 1 MSW
239X-002, 003
Sub Logic Board
CN2
Pin 34 SCLK
Pin 33 LEDD
Pin 32 SWD
Pin 31 SW LTCH
Pin 30 GAP SW
Pin 29 PUL CSF
Pin 28 HP
Pin 27 THRMO
Pin 26 HD8
Pin 25 HD6
Pin 24 HD4
Pin 23 HD2
Pin 22 HD1
Pin 21 HD3
Pin 20 HD5
Pin 19 HD7
Pin 18 HD9
Pin 17 HD11
Pin 16 HD13
Pin 15 HD15
Pin 14 HD17
Pin 13 HD18
Pin 12 HD16
Pin 11 HD14
Pin 10 HD12
Pin 9 HD10
Pin 8 HD21
Pin 7 MSW
Pin 6 HDCOM
Pin 5 HD19
Pin 4 HD23
Pin 3 HD24
Pin 2 HD22
Pin 1 HD20