ViewSonic E771-4 Service Manual page 21

ViewSonic Corporation E771-4
Figure 4-1. Convergence Magnets on the CRT
987654 3 2
1) Setup Bolt 2) Bow Magnet 3) Band 4) 2-Pole Magnet
5) Spacer 6) 4-Pole Magnet 7) Spacer 8) 6-Pole Magnet
9) Holder 10) Band 11) Tabs
3. Rotate the individual rings of 4-pole convergence magnets by changing the spacing between the 2 tabs to
converge the vertical red and blue lines at the center of the screen.
4. Rotate the pair of rings of 4-pole convergence magnets by maintaining spacing between the 2 tabs to
converge the horizontal red and blue lines at the center of the screen.
5. Rotate the individualrings of 6-pole convergence magnets by changing the spacing between the 2 tabs to
converge the vertical red, blue and green lines.
6. Rotate the pair of rings of 6-pole convergence magnets by maintaining spacing between the 2 tabs to
converge the horizontal red, blue and green lines.
7. Repeat the steps from 3-6 until the best convergence is obtained.
Figure 4-2. 4-pole and 6-pole Magnets Movement
Red/
Blue Red Blue Green
Red/
Blue Вше
Red Green
4-pole magnets 6-pole magnets
movement movement
Note : The 4-pole magnets and the 6-pole magnets interact, making dot movement complex.
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