Epson PX-8 - 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