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I
b
a
Figure A.
Left
. A..*.-...*.
, ::::::::::::::::::::~.
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. . . . . . . . . . . . . . .
I
I
. . . . . . . . . . . . . . .
\ ::::::~::::::::::::::::::::::
Beam landing equally outwards.
Figure B.
Left
. . . .
\
I
,
,
I
. y.:,:.:.:.*.v
Beam landing shifted to the right.
Figure C.
Left
. A55.. .
. . . . . . . . . . . . . . z.
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
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I
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I
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I
I
. . . . . . . . . . . . . . .
. . . . . . . . . . . * . . . . . . . . . . . . . .
.. . .. . . .. . .... . . . :.x.:.:.>:.
. . . . . . . . . . . . . . .
\
. . . . .
Beam landing shifted to the left.
Figure D.
PURITY ADJUSTMENT
Before the
with beam current of more than 700 ,uA for
longer than 30 minutes (400 PA for the 14"
model).
beam current to about 770 @I (500 fi for the 14"
model).
Notes:
Right
l
l
Adjustment:
During the adjustment, keep the set facing the east.
with a microscope. Adjust the purity magnet to
have these spots at the specified landing
outwards from their landing positions (shown in
Right
. .v.*. . .
1
I
I
I
I
. . . . . . . . . . . .
Right
Adjusting Conditions
purity adjustment,
Adjusting Procedures
Static convergence should
The purity magnet should be positioned where
the magnetic field is zero.
positions.
push the deflection yoke forwards for
Fig. B),
proper positioning.
(shown in
Figs. C and D),
a n g l e o f t h e p u r i t y m a g n e t f o r p r o p e r
positioning.
and left spots are in their specified landing
positions. Check the four corners of the CRT
screen.
See if all the landing positions are
satisfactory with the Rank "B" specifications.
deflection coil backwards.
Landing too outwards: Deflection yoke to push
forwards.
Landing too inwards : Deflection coil to pul I
backwards.
facing the east.
Adjustment error: 0 + 2 mm
Tightening torque:
warm up the set
be roughly adjusted.
Fig. A)
are
adjust the opening
well as the right
as
kg
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