Magnum PF21GB300 Service Manual page 5

2.1.2 Convergence Adjustment
Preparation: Before attempting any convergence adjustment, the TV should be operated for at least 15
minutes.
•Center convergence adjustment.
•Receive dot pattern.
•Adjust the brightness/contrast controls to obtain a sharp picture.
•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.
•Turn both tabs at the same time keeping the angle constant to superimpose red and blue horizontal on the
center of the screen.
•Adjust two tabs of the 6-pole magnet to superimpose red/blue line and green line.
•Remember red and blue movement. Repeat steps 2.1.3 2. 1.5 until optimal convergence is obtained.
•Circumference convergence adjustment.
•Loosen the clamp screw holding the deflection yoke assembly and allow it tilting.
•Temporarily put the first wedge between the picture tube and deflection yoke assembly. Move front of the
deflection yoke up or down to obtain better convergence in circumference. Push the mounted wedge in to fix
the yoke temporarily.
•Put the second wedge into bottom.
•Move front of the deflection yoke to the left or right to obtain better convergence in circumference.
•Fix the deflection yoke position and put the third wedge in either upper space. Fasten the deflection yoke
assembly on the picture tube.
•Detach the temporarily mounted wedge and put it in either upper space. Fasten the deflection yoke assembly
on the picture tube.
•After fastening the three wedges, recheck overall convergence and ensure to get optimal convergence. Tighten
the lamp screw holding the deflection yoke assembly.
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