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PURITY AND CONVERGENCE ADJUSTMENT
WTION;
Convergence and Purity have been factoty aligned. Do not attempt to tamper with these alignments. However, the ef-
kcts of adjacent raceiver components, or replacement of picture tube or deflection yoke may require the need to reed@t putity
and
convergence. If adjustment is required, the adjustments should be made in the following sequence.
PURITY ADJUSTMENTS
1.
2.
3.
_. ..
-.
r'
4.
5.
L>
6.
7
8.
Use a colour (Red, Green and Blue) pattern signal.
Receiver should be operated for at least ten minuter.
Place the picture tube face east or west and demagnetize the
picture tube and receiver using an external degaussmg coIl.
Turn off Red and Blue rasters and provide only Green raster
on CRT screen.
Loosen the screw holding the Deflection
yoke and remove
the 3 D.Y. wedges,
and
slide the
Defection
yoke
fully
frontward.
Rotate the two purhy magnet tabs (widen or narrow the mutu-
al angle made by the two tabs) to centre a vertical green
stripe.
(If the vertical green stripe doesn't obtain. In case, slide the
deflection yoke backward).
N~E:
Do not move the verhcal centre position by ad]ustmg
purity magnet
Slowly slide the Deflection yoke backward (or frontward) until
a uniform green raster is obtained.
NOTE
If some part of screen is contaminated
with other colors (in
most cases it will appear of corner of screen), put the Purity
correction
magnet
chip on back of that corner
near the
deflection yoke,
See Figure-A to position the Purity correction
magnet chip,
Slide and rotate the Purity correction
magnet chip until pure
green screen is obtained,
Use necessary
chips until uniform green is obtained
overall
the screen.
Use the tape (or adhesive)
to fix the magnet
on the picture
tube.
Check the purify of the red and blue rasters for uniformity.
(Turn up red raster and turn off green and blue rasters.
Turn up blue raster and turn off green and red rasters).
Readjust
the Deflection
yoke position if necessary
until all
rasters are pure.
If pan of the screen at each direction (east. west, north or
south) is colored, demagnetize
the receiver and the pcfure
tube and adjust the Deflection
yoke position slightly front
ward or backward.
Tighten
the mounting
screw
of the Deflection
yoke and
mount D.Y. wedges.
D.Y WEDGE
(CONVERGENCE)
SIX-POLE
MAGNET TABS
MOUNTING
SCREW
u'
/
PURITY MAGNET
TABS
Purity
White mark
Correct magnet chip
(north pole, Part No.
v
DeflectIon
Yoke ~
@
.<
< .
.
0-0
CONVERGENCE ADJUSTMENTS
Before any convergence
adjustments
are made, purify must be
adpsted
properly.
Connect
cross-hatch
generator
10 aerial
socket.
Loosen Iocklng ring provided on purity & convergence
magnet.
Notice
When
adlust the convergence
magne!s
do not move
purtty
magnets
pl,-jRITy
MAGNET
LOCKING
RING
(SOME MODELS)
45mm
610076
599)
PURITY AND CONVERGENCE
MAGNETS
–4–
. .
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