Radio Shack TRS-80 Service Manual page 35
Pocket computer printer and cassette interface
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Also See for TRS-80:
- Reference manual (274 pages) ,
- User manual (236 pages) ,
- Service manual (199 pages)
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more
about Sharp
PC-1500
at
http://www.PC-1500.info
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• 1"
~
1"
~o"
3-2.
Remote
circuit
Vee
(
+
5.8V
)
74ox4
P1\ I
2
PA2
1
/0
port
PA3
3
)fj
•
PA4
10
9
7
8
M54516P
Stop
bit
Stop
bit
OFF
ON
REMOTE
Rel\IOTeO
@
l~El\IOTE
I
11tis circuit is
provided
to
perfonn automatic control
of CMT
on/off action.
Signal
from
the PC-2
is used to actuate the relay via
1he
1/0
port (lRS810
or
LH581
l).
When the
REMOTE
ON/OFF
switch
is
in the OFF position,
the
REMOTE 0 circuit shuls
off and
disables control from the
PC-2.
Nonnally,
connection is made
to
the
REMOTE
0 jack
when
one
unit
of CMT is used and both
REMOTE 0
and
REMOTE
I jacks
are connected to
use two
units
ofCMT.
PAI
or
PA3
l'-1\2
or
- - - - -
-- -
-- - - -
---/!---------"
PA1
ON
Relay
OFF
Do not sale
this
PDF
!!!
-31
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