Akai M-9 - ADJUSTMENT OF LINE OUTPUT LEVEL

3.
ADJUSTMENT
OF
LINE
OUTPUT
LEVEL
(A)
Playback
(See
Fig.
3)
a.
b.
Cc
Set
the
Record/Playback
Knob
to
“Play”
position
and
the
Equalizer
Switch
to
7-1/2”.
Connect
the
V.T.V.M.
(use
one
with
Milli-Volt
scale)
to
the
Line
Output
Jack.
Playback
the
test
tape
(250
Hz
“0”
VU
recorded)
at
7-1/2"
tape
speed
and
turn
the
volume
VR-201
(20KB)
46 99
until
the
Line
Output
level
reaches
“0”
VU
1.228
V
(+4dB).
Fig. 3
(B) Recording and Playback (See Fig. 4)
a.
b.
Cc.
Connect
V.T.V.M.
to
the
Line
Output
Jack
and
put
on
a
Scotch-111
blank
tape.
Set
the
Record/Playback
Knob
to
“REC”
position
and
the
Equalizer
Switch
to
7-1/2”.
Feed
in
a
1,000
Hz
sine
wave
signal
from
an
Audio
Frequency
Oscillator
to
the
Line
Input
of
the
M-9
and
turn
the
Recording
Level
Volume
Control
VR-1
(50K-A)
until
the
Line
Output
Level
reaches
“0”
VU
1.228
V(+4dB).
After
a
few
seconds
of
recording,
rewind
the
tape
back
to
the
starting
position,
Then
playback
the
tape.
If
the
Line
Output
Level
does
not
reaches
“0?”
VU,
turn
the
Volume
VR-3
(2KB)
until
the
Line
Output
Level
re-
aches
“0”
VU.
Repeat
this
process
2
or
3
times
as
indicated
in
c.
and
d.
above.
LINE
pse}—2-(9)
:
(2)
10/10
VR1 50KA
Fig. 4
—14—