akira CT-29FD9CPT, Руководство по обслуживанию

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Model No: CT-29FD9CP
T
Version 1.0
6
2-1 CONVERGENCE MAGNET ASSEMBLY POSITIONING
Convergence magnet assembly and rubber wedges need mechanical positioning following
figure 2.
2-2 COLOR-PURITY-ADJUSTMENT
NOTE: Before attempting any purity adjustments, the receiver should be operated for
at least 15 minutes.
1. Demagnetize the picture tube and cabinet by using a degaussing coil.
2. Turn the CONTRAST and BRIGHTNESS controls to maximum.
3. Adjust RED and BLUE BIA, 5 controls to provide only a green rather.
4. Loosen the clamp screw holding the yoke, and slide the yoke backward to provide
vertical green belt (zone) in the picture screen.
5. Remote the Rubber Wedges.
6. Rotate and spread the tabs of the purity magnet (See figure 3) around the neck of the
picture tube until the green belt is in the center of the screen. At the same time,
center the raster vertically.
7. Move the yoke slowly forward until a uniform green screen is obtained. Tighten the
clamp screw of the yoke temporarily.
8. Check the purity of the red and blue raster by adjusting the BIAS controls.
9. Obtain a white raster, referring to “CRT GRAY SCALE ADJUSTMENT”.
10. Proceed with convergence adjustment.