akira CT-21CDP5CPT, Service Manual

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Model no.:CT-21CDP5CPT.doc
version 1.0
15
Fig. 1
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
ertical 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.