Akai AX-890

IV.
MECHANICAL
ADJUSTMENT
|
4-1.
ADJUSTMENT
OF
THE
HEAD
AZIMUTH
“ALIGNMENT
=
|
1)
Connect
an
AC
milli-voltmeters
to
the
L-ch
and
R-ch
of
LINE
OUT
on
the
AX-890
and
connect
CH-1
and
CH-2
inputs
of
an
oscilloscope
to
the
output
of
the
AC
milli-
voltmeters.
co:
2)
Play
back
a
10
kHz
(-15
dB),
HEAD
AZIMUTH
ALIGNMENT
TEST
TAPE
(TF-106CH)
then
adjust
the
PB
HEAD
AZIMUTH
ALIGNMENT
®
(FWD
PLAY)
and
®
(REV
PLAY)
SCREWs.
respectively
so
that
the
reading
on
the
AC
milli-voltmeters
are
at
maximum
and
waveforms
on
the
oscilloscope
are
in
the
same
phase,
in
both.
FWD
and
REV
directions.
Perform
the
adjustment
on
both
the
TAPE-|
and
TAPE-II
heads
if
necessary.
(Use
a
de-
@screw
@screw
@scRew
-®
screw
magnetized
philips
type
screwdriver
for
adjustment.)
cm)
(REY)
ee)
(REY)
3)
After
adjustment,
the
AZIMUTH
ADJ.
screws
must
be
paint-locked
(refer
to
Fig.
3-11
on
page
31).
TAPE
-
|
TAPE
-
tl
Fig.
4-1
rns
SERVICE
MANUAL
SS
St
32