Tandy WP-2 Service Manual page 87

RS-232C
+5V
DATA BUS
IC9
JJPD71051G
DO
Dl
D2
03
D4
D5
D6
07
CLOCK
RESET
.
AO
51CS
.
IORD
.
Town.
27
28
20
21
12
11
13
10
RCD
«^
O.lu
—
26
DO
Dl
D2
D3
D4
D5
D6
D7
vcc
TXD
TXE
T
XHOY
TXC
RXD
RXRDY
RXC
19
IT"
TO"
CLK
SYNDET
RESET
C/D
CJS
CS
OSR
RG RTS
WR OTR
VSS
3
^r
IS
17
22
23
24
TXC
INT1
RXC
+5V
t
+5V
IC10
DS14CS9
i:
.T-
I
14
Tec
%-
O.Olu
1Y
1A
2Y NC
3Y 2A
4Y
NC
3A
NC
4A
NC
1
r2"
SND
5~
10
9
13
12
=br
C42
IC11
DS14C88
ii
—
C41
1C40
C39
IK
R64
IK
R66
IK R67
IK R68
22pF
IK
R59
13
12
1A
2A
IB
2B
1C
2C
10
GND
_1Y
2Y
3Y
4Y
+V
-V
11
IK R70
IK
R71
+5V
3- C18 O.Olu I—
CN6
CO
RXD
CTS
DSR
TXD
RTS
TJTR
GND
NC
4v
9
OlU
"C45"
RS232C PORT
22pF
C43
C44
IC9-11
C16-19. 39-45
CN6
R64,
66-71
8-5