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Teac MT-20D-IO - Page 114

Teac MT-20D-IO
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liD/CAS"
4-2-6
Initialization
of
SOB
The
SOB
(Simulator
OB)
is
a
simulator
to
test
the
overall
~ITU
including
the
PCBA
Interface
Control.
This
simulator
permits
the
error
rate,
etc.
to
be
checked
with
MTU
set
to
online
status.
The
PCBA
Interface
Control
can
also
be
adjusted
and
tested
by
connecting
SOB.
Prior
to
the
use
of
SOB,
perform
the
following
initialization.
(1)
Preset
the
output
voltages
of
the
DC
power
supply
to
+12 V
and
+5
V.
(2)
Turn
off
the
DC
power
supply,
and
connect
the
power
cable
to
the
DC
PWR
connector
of
SOB.
(3)
Connect
the
power
cable
to
the
POWER
connector
J2
of
MTU.
(4)
Connect
the
interface
cable
between
the
MT-2ST
INTERFACE
connector
of
SOB
and
JI
of
MTU,
so
that
the
triangular
mark
of
the
connector
is
set
to
the
terminals
1
and
2
side.
(5)
Turn
on
the
DC
power
supply.
(6)
Check
if
the
power
voltage
supplied
to
MTU
is
within
the
range
of
-5%
to
+5%
of
the
rated
voltage,
using
a
digital
voltmeter
(DCV).
Between
TPI5
and
TPI8
of
PCBA
Drive
Control:
+12 V
power
voltage
(11.4
to
12.6
V)
Between TP16
and
TPl8
of
PCBA
Drive
Control:
+5 V
power
voltage
(4.75
to
5.25
V)
- 4021 -

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