Epson PX-8 Technical Manual page 125

REV.-A
A circuit diagram of the RS-232C interface circuit.
13
0.1
~~=1==~--------TXDJTOCN8
RXD option interface
IiZ&BtL
10K
t-t-t-:I-----
-+-t
--~
---t+
_-_-_-_:-_-_-_~~~~~~~3_7_8_4
_____ :::
J
To gate array
011 , - - -
SWRS GAH40M
MA
INHRS
151WA
011
I
IOOJ116V
2
CI4 + C8
t-
16
ERAer
05 '3
IDD~
02
J6V +-
R
100
h
GND
VB
R
c
0
C
R
T
0
G
C
X T
5
0
1
x
T
N
G
0
S
R
0
R
0
3
8
4
CN 7
RS232
Fig. 2-104 RS-232C Interface Circuit
2-101