Prior Adjustment - LG LH-CX640 Series Service Manual

4-16
DECK
MECHANISM
ADJUSTMENT
Fig.
C-5-1
A/C
Head
Base
Fig.
C-5-2
Height
Adjustment
Screw(B)
Tilt
Adjustment
Screw(C)
Azimuth
Adjustment
Screw(A)
X-Value
Adjustment
Hole
Fig.
C-5-3
A/C
Head
Tape
Tape
0.2~0.25mm
P4
A/C
Head
Assembly
Purpose of
adjustment
:
To
ensure
that
audio
and
control
signals
can
be
recordedand
played
according t o
the
contract
tract
by
constantly
maintaining
distance
between
tape
and
head, and
tape
tension
between
the
P3
post
and
the
P4
post.
5.
Audio/Control
( A/C)
Head
Adjustment
Adjustment
Procedure/Adjustment
Diagrams
1)
Basically
use
the
A/C
head
assembly
adjusted
as
in
SPEC.
2)
Check
there is
crumpling
and
folding
of
the
tape
around
the
A/C
head.
If it
is,
Turn
and
adjust
the
tilt
adjusting
screw
to
ensure
that
the
tape
corresponds
to the
bottom
guide
of
the
P4,
and
recheck
the
tape
path
after
pro-
ceeding
play
for
4-5
seconds.
3)
Where
the
tape
bottom
is
not
equal
to
Fig.
C-5-3,
Adjust
the
height by
using
the
height
adjusting
screw
(B)
and
then readjust
it
by
using
the
tilt
adjusting
screw
(C).
CAUTIONS
Always
check
the
height
of the A/C
head
since
most
ideal
height
of
A/C
head
can
be
obtained
when
the
bottom
part
of
the
tape
is
away
0.2
~
0.25mm
from
the
bottom
part
of
the A/C
head.
Fixtures
and
tools
used
VCR
(VCP)
status
Adjustment
position
\342\200\242
Blank
Tape
(Empty
Tape)
\342\200\242
Driver
(+)
Type \303\270
5
\342\200\242
Play
the
blank
tape
(empty
tape).
\342\200\242
Tilt
adjusting
screw
(C)
\342\200\242
Height
adjusting
screw
(B)
\342\200\242
Azimuth
adjusting
screw
(A)
5-1.
Prior
Adjustment
(performed
only
when
no
audio
output
appears
in
play
of
the
standard
test
tape)
Fixed
Screw