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Teac MT-20D-IO - Page 157

Teac MT-20D-IO
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4-3-15
Check
and
adjustment
of
read
level
(1)
Articles
to
be
used
(a)
Work
tape
(b)
Conventional
screw
driver
small
size
(c)
SOA
Cd)
DC
power
supply
(+12
V,
+5
V)
"Permalloy
Head"
(2)
Check
and
adjustment
procedures
(a)
Connect
SOA
in
accordance
with
Item
4-2-5,
and
set
the
POWER
switch
to
the
PSA
side.
(b)
Load
the
work
tape
on
MTU.
(c)
Wind
the
work
tape
nearly
in
the
winding
center.
(d)
Key
in
"CO". The
read
level
is
displayed
to
the
display
DATA
1 on
SOA.
(e)
Check
if
the
read
level
is
within
the
range
of
1.22
V
to
1.72
V.
(center
value:
1.47
V)
(f)
Key
in
ttF"
to
stop
the
operation.
(g)
Key
in
"A21".
The
write/read
track
on
MTU
is
changed
over
to
Track
1.
Perform
the
same
check
as
in
steps
(d),
(e)
and
(f).
(h)
If
the
result
of
step
(e)
is
out
of
the
specification,
make
the
following
adjustment.
(i)
Key
in
"A20".
The
write/read
track
on
MTU
in
changed
over
to
Track
O.
(j)
Key
in
"E3".
The
indicator
REPEAT
on
SOA
lights
up.
(k)
Key
in
"CO". The
read
level
is
indicated
to
the
display
DATA
1 on
SOA.
Adjust
R48
on
the
PCBA
Drive
Control
until
the
read
level
is
1.47
V.
(1)
Key
in
"F"
to
stop
the
operation.
- 4064 -

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