Epson LQ-2550 Technical Manual page 270

Pin
Terminal
No.
VPP
—
10 GND
2
17 BD
COM
AIN
5
BIN
14
7
16 DIN
AOUT
4
13 BOUT
6 COUT
15 DOUT
3 ZD
18 E
8 RAC
12 RBD
9 VRAC
11 VRBD
Table A-1 2. STK6722H Terminal Functions
I + 3 5 V D C
GH
PF motor coil A/C drive voltage
o
o PF motor coil B/D drive voltage
I
PF motor coil A drive pulse
I PF motor coil B drive pulse
PF motor coil C drive pulse
I
I PF motor coil D drive pulse
o PF motor coil A drive terminal
PF motor coil B drive terminal
o
o PF motor coil C drive terminal
o PF motor coil D drive terminal
PF motor surge voltage output terminal
o
o HOLD/DRIVE switch
I Coil A/C current detection resistor mounting terminal
Coil B/D current detection resistor mounting terminal
I Constant current control reference voltage (Coil A/C)
I Constant current control reference voltage (Coil B/D)
Description
A-25
REV.-A