EasyManua.ls Logo

Teac MT-20D-IO - Page 155

Teac MT-20D-IO
253 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
4-3-14
Check
and
adjustment
of
read
preamplifier
level
(1)
Articles
to
be
used
(a)
Level
test
tape
(b)
Conventional
screw
driver
(c)
SOA
small
size
(d)
DC
power
supply
(+12
V,
+5
V)
(2)
Check
and
adjustment
procedures
(a)
Connect
SOA
in
accordance
with
Item
4-2-5,
and
set
the
POWER
switch
to
the
PSA
side
(it
is
not
required
to
connect
a
check
cable
C).
(b)
Erase
the
level
test
tape
by
the
bulk
eraser
or
erase
the
portion
of
tape
to
be
used
for
test
over
some
length
by
using
MTU.
(c)
Load
the
erased
level
test
tape
on
MTU.
(d)
Wind
the
tape
nearly
in
the
winding
center.
(e)
Connect
the
oscilloscope
to
TP3
on
the
PCBA
Drive
Control.
(£)
Key
in
"A22".
(g)
Key
in
"A63F".
Measure
the
signal
level
on
the
oscilloscope.
TP3
Signal
level
Since
the
signal
contains
large
noise,
triger
the
signal
appropriately
changing
the
triger
level
until
the
picture
shown
in
the
above
is
obtained.
Fig.
432
Measurement
of
read
preamplifier
level
(h)
Check
if
the
signal
level
is
within
the
range
of
-150
mV
to
+150
mV
for
the
calibrated
value
of
the
level
test
tape
used.
Example
When
the
calibrated
value
is
250
mV,
the
abovementioned
range
is
from
100
mV
to
400
mV.
(i)
Key
in
"F"
to
stop
the
operation.
(j)
Key
in
"A2l".
-
4062
-

Related product manuals