PacComm TINY-2 - Page 151

EM-NB
Current
Firmware:
32k
RAM,
with
PMS:
P1.1.6D4
PMS
3.0
$2F
European
TNC-200,
32k
RAM,
with
PMS:
E1.1.6D4
PMS
3.0
$41
Current
Firmware:
32k
RAM,
with
PMS:
P1.1.6D4
PMS
3.0
$1D
European
TNC-220,
32k
RAM,
with
PMS
_E1.1.6D4
PMS
3.0
$8F
Note:
The
SOFTDCD
command
is
defaulted
OFF,
but
must
be
set
to
ON
for
proper
operation
if
there
is
no
tuning
indicator
installed.
Technical
Reference
Manual,
Second
Edition.
The
MC-NB96
product
is
manufactured
on
a
circuit
board
with
the
identification
of
DFM-MC.
The
parts
placement
on
this
circuit
board
is
quite
different
than
earlier
versions.
The
manual
still
refers
to
the
older
version
circuit
board,
but
all
the
part
and
connector
specifications
are
the
same.
The
schematic
shipped
with
the
MC-NB96
is
up
to
date.
The
MC-NB96
is
shipped
without
the
mounting
connector
attached
to
the
circuit
board.
Solder
the
connector
at
location
S1A
for
the
TNC-200
(TNC-2,
TNC-2A,
PK-80),
MFJ
1270/1270B/1274/1278,
and
PC-320.
Solder
the
connector
at
location
$i
for
the
TINY-2,
MICROPOWER-2,
and
TNC-320.
Insure
that
the
pin
1
of
the
connector
contacts
pin
1
of
the
disconnect header.
The
Transmit
Audio
(TXA)
coaxial
cable
from
the
MC-NB96
is
labeled
with
a
spot
of
gold
paint or TXA label.
PacComm
packet
controllers
have
pin
1
of
the
modem
disconnect
header
located
as
follows:
TNC-200,
-2,
MICROPO
-2:
Pin
nearest
to
board
edge;
TNC-220:
pin
closest
to
rear
of
circuit
board
(marked);
TNC-320:
Pin
closest
to
JS
marking;
PC-
320:
pin
closest
to
lower edge of circuit board.
Cut
traces
1
&2
and
17
&18
on
the
underside
of
the
modem
disconnect
header
of
the
packet
controller.
If
recovered
clock
from
the
MC-NB96
is
used,
also
cut
the
trace
between
pins
13
it
On
TINY-2
and
MICROPOWER-2
TNCs
which
are
several
years
old,
it
may
be
necessary
to
shorten
JPL
and
JPD
and
to
bend
C25
to
the
side
to
clear
the
MC-NB96
board.
The
EM-NB96
is
currently
undergoing
revision.
'SK-1 and PSK-1T:
Current
Firmware:
(PSK-1)
Version
2.10,
12/4/91,
$251A;
(PSK-1T
modem)
Version
3.10,
12/2/91,
$A4C8,
(PSK-1T
TNC)
1.1.6D5,
12/2/91,
$2D.
:
Instruction
Manual,
Second
Edition,
December
1991.
Page
31,
Jumper
Definitions:
JP-4
is
better
described
as
an
output
level
test
point.
JP-5
gives
increased
output
level
when
jumpered.
JP-6
is
located
close
to
the
two
voltage
regulators.
Position
5&6
(for
PK-232)
is
the
pair
of
pins
closest
to
the
center
of
the
circuit
board.
Position
1&2
are
located
closest
to
the
edge
of
the
board.
The
following
production
change
has
been
made
for
increased
PSK-1
output.
The
value
changes
may
not
be
shown
on
the
schematic.
R41
changed
to
13k
and
C66
changed
from
0.1uf
to 0.2
PSK-1 cable color coding: 8 pin DIN cable 5 pin DIN cables Alternate 8 pin DIN cable.
(Confirm with Ohmeter.)
Pini Red Yellow Red
Pin 2 Yellow Red Green
Pin
3
Blue
Black
Black
Pin 4 Orange Orange White
Pin 5 Green Brown Yellow
Pin
6
Brown
/
Brown
Pin7
Violet
Orange
Pin
&
Black
Blue