Digital Equipment 21BM18, Руководство по обслуживанию, Страница: 8 / 51

SERVICE MANUAL
6
Fig. 1
2. Convergence Adjustment
Preparation:
Before attempting any convergence adjustment, the TV should be operated for at least 15 minutes.
2.1 Center convergence adjustment
2.1.1 Receive dot pattern.
2.1.2 Adjust the brightness/contrast controls to obtain a sharp picture.
2.1.3 Adjust two tabs of the 4-pole magnet to change the angle between them and red and blue
vertical lines are superimposed each other on the center of the screen.
2.1.4 Turn both tabs at the same time keeping the angle constant to superimpose red and blue
horizontal on the center of the screen.
2.1.5 Adjust two tabs of the 6-pole magnet to superimpose red/blue line and green line.
2.1.6 Remember red and blue movement. Repeat steps2.1.3
～
2..1.5 until optimal convergence is
Deflection Coil
Dummy Wedge
Rubber Wedge
Adhesive
Deflection Yoke
Purity/Convergence
Magnet Module
Glass Cloth Tapes
6-pole Magnet
Adjust the Angle (Vertical Lines)
Fixed
Rotate Two Tabs At the
Same Time (Horizontal Lines)
Adjustment of Magnets
Purity Magnet
Convergence Magnet Assembly
4-pole Magnet
Fig. 2