Convergence Adjustments - Sanyo CZP3011V Service Manual

PURITY AND CONVERGENCE A13JUSTMENT (140A/141A)
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(XIJTION; Convergence and Purity have been factory aligned. Do not attempt to tamper with these alignments. However, the ef-
fects of adjacent receiver components, or replacement of picture tube or deflection yoke may
require the need to madjuat purfty
and convergence. If adjustment is required, the adjustments should be made in the following sequence.
PURITY ADJUSTMENTS
1.
2.
3.
4.
5.
6.
7
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 degaussing 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 purity 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 yuke backward).
NOTE: Do not move the vertical centre position by adjusting
purity magnet.
Slowly slide the Deflection yoke backward (or frontward) until
a uniform green raster is obtained.
NOTE:
Following
is CZP6011V only.
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 purity of the red and blue rasters for uniformky.
(Turn up red raster and turn off green and blue rasters.
Turn up blue raster and turn off green and red raster?+.
Readjust the Deflection yoke position if necessary until all
rasters are pure.
If part of the screen at each direction (east. west. north or
south) is colored, demagnetize the receiver and the picture
tube and adjust the DeflectIon yoke position slightly front -
ward or backward.
8. Tighten the mounting screw of the Deflection yoke and
mount D.Y.wedges.
CONVERGENCE ADJUSTMENTS
Before any convergence adjustments are made, purity must be
adjusted properly.
Connect cross-hatch generator to aerial
socket.
Loosen Iockmg ringprowded on purty & convergence magnet.
Notice: When adlust the convergence magnets, do not move
puritymagnets
DY WEDGE
9
(CONVERGENCE) .
L7r
(CONVERGENCE)
'A
SIX-POLE
MAGNET TABS
FOUR-POLE
"GNET
'ABS4W2
DEFLECTlbN YOKE
MOUNTING SCREW
4!5
I*
17mm—
.. . .. .
,s
[[Ii
P'~
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CZP3011V
26mm—
/2+.s)
CZP6011V -
PURITY MAGNET
TABS
Purity White mark
Correct magnet chip (north pole, Pari No. ZZ0127)
(
.2
<
m
LOCKING
RING
(SOME MODELS)
I
-
PURITY
MAGNET
J
7
—
I
Figure-A
PURITY AND CONVERGENCE MAGNETS
+
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