Epson LQ-2550 Technical Manual page 273

REV.-A
The H8D2 148 is an
2-phase stepper motor.
5
R5
z
1
RI ?2
4
3
c l
6
Pin
Terminal
No.
12 A
13 B
2 ENB
TH
4
8 VF
FB
9
5
6
GND
1 TOUT
3
7
10
SOUT
11
temperature detection and feedback circuits, and is used to control the
Figure A-30. H8D2148 Pin Diagram
8
'
1-
-
& -
+
C4
R 10
Figure A-31. H8D2148 internal Circuit
Table A-1 4. H8D2148 Terminal Functions
Description
o HF motor coil A drive terminal
o
HF motor coil B drive terminal
I Enable IC (7B: PB6, pin 15)
o HF
motor temperature detection (thermistor)
I External resistor terminal for constant selection
I
+ 5 V D C
I
— Ground
— Not used
—
—
—
—
s
DT VF
'T
C 3
1
R 12
?14
R 13
R 1S
TR 1
Primary Destinations "
A - 2 8
B
TOUT ,