Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual page 153

Main Logic Board <--> Sub Logic Board (Model - 001)
23XX-001
Main Logic Board
CN3
Pin 1 SCLK
Pin 2 LEDD
Pin 3 SWO
Pin 4 SW LTCH
Pin 5 3SW
Pin 6 PUL CSF
Pin 7 HP
Pin 8 ASF
Pin 9 THRMO
Pin 10 HDCOM
Pin 11 HD8
Pin 12 HD6
Pin 13 HD4
Pin 14 HD2
Pin 15 HD1
Pin 16 HD3
Pin 17 HD5
Pin 18 HD7
Pin 19 HD9
Pin 20 HD11
Pin 21 HD13
Pin 22 HD15
Pin 23 HD17
Pin 24 HD19
Pin 25 HD21
Pin 26 HD23
Pin 27 HD24
Pin 28 HD22
Pin 29 HD20
Pin 30 HD18
HD16
Pin 31
Pin 32 HD14
Pin 33 HD12
Pin 34 HD10
238X-001
Sub Logic Board
CN2
Pin 34 SCLK
Pin 33 LEDD
Pin 32 SWO
Pin 31 SW LTCH
Pin 30 3SW
Pin 29 PUL CSF
Pin 28 HP
Pin 27 (Not Used)
Pin 26 (Not Used)
Pin 25 (Not Used)
Pin 24 HD8
Pin 23 HD6
Pin 22 HD4
Pin 21 HD2
Pin 20 HD1
Pin 19 HD3
Pin 18 HD5
Pin 17 HD7
Pin 16 HD9
Pin 15 HD11
Pin 14 HD13
Pin 13 HD15
Pin 12 HD17
Pin 11 (Not Used)
Pin 10 HD21
Pin 9 (Not Used)
Pin 8 (Not Used)
Pin 7 (Not Used)
(Not Used)
Pin 6
Pin 5 HD18
Pin 4 HD16
Pin 3 HD14
Pin 2 HD12
Pin 1 HD10
239X-001
Sub Logic Board
CN2
Pin 34 SCLK
Pin 33 LEDD
Pin 32 SWO
Pin 31 SW LTCH
Pin 30 3SW
Pin 29 PUL CSF
Pin 28 HP
Pin 27 (Not Used)
Pin 26 THRMO
Pin 25 HDCOM
Pin 24 HD8
Pin 23 HD6
Pin 22 HD4
Pin 21 HD2
Pin 20 HD1
Pin 19 HD3
Pin 18 HD5
Pin 17 HD7
Pin 16 HD9
Pin 15 HD11
Pin 14 HD13
Pin 13 HD15
Pin 12 HD17
Pin 11 HD19
Pin 10 HD21
Pin 9 HD23
Pin 8 HD24
Pin 7 HD22
Pin 6 HD20
Pin 5 HD18
Pin 4 HD16
Pin 3 HD14
Pin 2 HD12
Pin 1 HD10
Connector Locations 5-13