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1-3.
Beam Landing Adjustment
(1) Receive the green raster signal through the pattern generator.
(2) Loosen the magnet lock screw, and shift the magnet assembly
backward (toward the neck).
(3) Loosen the DY lock screw, and shift the DY deflecting yoke
backward (toward the neck).
(4) After opening the two purity magnets to the same angle, adjust
the color width of the bands on both sides of the screen so
that they are of equal width. (refer to Fig. 1-5 (a)).
R
Fig 1-5 (a)
As shown in Fig. 1-5 (b), the purity magnet functions in
relation to the electron beam.
S
N
N
S
S
N
N
Fig 1-5 (b)
(5) Gradually shift the deflecting yoke toward the front (toward
the CRT funnel). Stop movement at the point when the screen
has become completely green.
(6) Also, verify the respective monochromatics of red and blue.
(7) While looking at the screen, adjust the tilt of the deflecting
yoke and tighten the DY lock screw.
(8) Shift the magnet assembly to the front (toward the CRT
funnel), stop movement before the adjustment position and
then tighten the magnet lock screw.
At this time, be careful not to shift the position of the purity
magnet.
R=B
G
B
S
NS
SN
SS
NN
As there is occurrence of convergence distortion after
completing the landing adjustments, be certain to carry out
convergence adjustments.
If the color irregularity in the screen's corner section are not
improved, correct them with the landing magnet. After using
the landing magnet, be sure to demagnetize the CRT with
degausser and verify that there is no occurrence of color
irregularity. (refer to Fig. 1-6)
Landing magnet: 81-JTI-710-010
(two-sided adhesive tape) : 80-XVI-218-010 Cushion
Since the landing magnet is polarized,
check the screen's improvement through
rotation, not only by position.
29
Landing magnet
Cushion
Fig 1-6
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