Epson LQ-2550 Technical Manual page 277

REV.-A
Input
Side
Pin No. Terminal
39
41
80
82
29 NU 1
NU2
70
40
Pu 1
81 P U 2
TS 1
3 0
3 8
71
7 9
Table A-1 5. STK66082E Terminal Functions
Output Side
Pin No. Terminal
+35 VDC input ON/OFF
Printhead drive Tr. (X 24)
+35 VDC switching Tr. (x 4)
Not
3 Surge voltage feedback terminal
17 D2
44 D3
58 D4
Description
base pulled up (by Vx)
base pulled up (by Vx)
used (open)