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2mm
slip ring
brush
Fig. 7-9
Brush pressure
17.
18.
Inspect
the brush
and
slip-ring
assembly
to
make
sure
that
the
brushes
are
centered
in
the slip rings.
If the brushes are not centered,
loosen the brush position adjusting screws in
Fig. 7-9
and
apply
drops
of head
cleaning
fluid onto the slip-rings.
Set up the playback
mode
to rotate the video heads.
Adjust the
position
of
the
brushes
so
that
they
are
centered
in
the
slip-rings
and
tighten
the
brush-position adjusting screws.
If the
erase
head
had
been
temporarily
re-
moved, install it in original position.
PG Check
19.
After
a new
video
head
assembly
has
been
installed, it is necessary to check PG outputs
and
their relative
positions.
See Sec. 4-3-3
and 4-3-4.
needs dihedral adj.
needs
|
adjustment
good |
Fig. 7-10
Head dihedral adjustment
7-5
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