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b
Vertical Magenta Band
(9) Move DY so that the rear edge position of DY comes to the center of the two marked lines and fasten DY as d=d1 (Figure 1-3-4). Further insert the rubber wedge between DY and CPT funnel from the top and raise DY backwards.
a
a' a-a', b-b' Show the geometric center line of CPT Screen b'
FIGURE 1-3-4 b
FIGURE 1-3-1
a - a' b - b' Geometric center a line of CPT
d
d' a'
b'
C-F MAG P#2773672 P#2775082 (For VM Models)
C-F MAGNET P#2773671
FIGURE 1-3-2 The openings of the purity magnet should be symmetric: on the right and left sides (P#2773671) on the upper and lower sides (P#2773672) (7) Receive the single red signal. When the single red signal is not available, short circuit between the base and emitter of Q845, and between the base and emitter of Q857 and set to single red. (8) Pull back DY gradually and when the color unevenness of both sides of the picture disappear, mark the rear edge position of DY on the tape wound around CPT neck as shown in Figure 1-3-3. Pull back DY further and just before the color unevenness of both sides of the picture disappear, mark the rear edge position of DY on the tape in the same way. At this time, pull back DY so that the center axis of DY and CPT axis match.
(10) Set CRT axis direction magnetic field of the artificial magnetic field according to the artificial magnetic field setting list classified by destination. (The direction of the magnetic field should be from the CPT screen side to the neck side.) (11) After degaussing it from outside, check the purity in each color to R, G and B visually. Then, turn the screen to white and check the landing at the screen position shown in Fig. 1-3-5 with a microscope. Criteria with microscope There should be no miss landing at positions 2, 4, 8 and 10. Green beam should be at center of the green phosphor at position C. (Refer to the miss landing criteria.) (12) Turn over the direction of CPT axis direction magnetic field of the next artificial magnetic field and check it by the same way as item (11). The positions of miss landing criteria with a microscope should be 2, 4, 8 and 10 (Figure 1-3-5).
10 C
2
ø80mm x 5
8
4
FIGURE 1-3-5
MASKING TAPE
CPT Neck
Miss landing criteria The following conditions are defined as miss landing. Each color beams shines on the phosphor of the applied color and there are phosphor parts which are not luminous (shaded parts in
FIGURE 1-3-3
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