Adjustments; Setup Adjustments; Beam Landing - Sony Trinitron PVM-1271Q Service Manual

PVM-1271Q
SECTION
3
ADJUSTMENTS
3-1.
SETUP
ADJUSTMENTS
3-1-1.
BEAM LANDING
^
Q
Landing Adjustment
In
the case of
a
6,500
K
color
temperature, the
number
of
VRs
to
be adjusted will
differ.
(1)
Turn on
set
power supply
and
receive
and
all-
white signal.
(2)
Evenly degauss
the entire screen.
(3)
Loosen the deflection
yoke mounting
screw,
and
set
the purity control to the center as
shown
in
Fig. 3-1.
(4)
Set
BKG
volume RV706
(R)
to
maximum
and
set
RV704
(G)
and RV702
(B) to
minimum.
(5)
Move
the deflection
yoke
back,
and
adjust
the
purity control so that (R)
is
in
the center
and (G)
and
(B) are at
the
sides,
evenly. (Fig.
3-2)
(6)
Move
the deflection
yoke forward so that the
entire
screen
is
R.
*
If
the deflection
yoke
is
pushed
all
the
way
to
the
CRT
then
moved
slightly
back, landing
adjustment
is
easier.
(7)
Substitute (R),
then (B)
for
(G)
in
step (4)
and
check landing.
(8)
Rotate (R),
(G)
and
(B)
once
each and check
landing.
(9)
When
landing
is
not
right,
adjust
the purity
control
and use
magnets
as
shown in Fig. 3-3,
then
repeat steps (7)
and
(8).
(10)
When
a
magnet
is
used,
be sure to
perform
step
(2),
and tighten deflection
yoke mounting screw
loosely.
Note:
The
circled
numbers
((^)-(7)and
@)
shown
above
steps.
purity control
Fig. 3-3.