Tandy 1400LT Service Manual page 130

0
RS-232C Check
Check M O D / K
select signal
Pin44 of GATE3.
Check GATE31
Is a low pulse-
available at CS2
of TC8570P
Pin14 of IC35?
Is a clock suitable
for baud rate gene-
ration? 1.8432MHz
1
Check CTL3, R23,
R24,C48 and C49.
eck the transmission si
I
ow l e v e
"u
Check IC46 and IC48
( C T S , m , and CTSl2 signal)
5-2 1