NEC JC1402HME Service Manual page 24

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Purity Magnets
4-pole magnets (Red to\lue Convergence)
6-pole magnets (Green to Magenta Convergence)
29' 1 nlln
Purity, Convergence Magnet Assembly (I'CM)
B R
--, the an~le betwecn the tabs.
Il ___
~
_L_
I·
I<
1-
B/RG . .
1 Perform the adJustment by openln~
-+-
the angle between the tabs.
___
~ ~lLR I
Perform the adjustmenl hy
\yndlrollou')
rotation of the two tabs.
~ ~t
Perform the adjustment by opening
: Perform the adjustment by synchrunous
rot.ltion of thc two tabs.
'--------~
Red to
Blue
Convergence
(Magenta)
(8) Convergence Adjustment
Green to Magenta Convergence
(White)
a) Produce a magenta crosshatch on the display.
b) Adjust the focus for the best overall focus on the display.
Also adjust the brightness to the desired condition.
c) Vertical red and blue lines are converged by varying the angle between the two tabs of the
4-pole magnets on the PCM assembly. (See above diagrams)
d) Horizontal red and blue lines are converged by varying the two tabs together. keeping the
angle between them constant.
e) Produce a white crosshatcll pattern on the display.
f) Vertical green and magenta lines are converged by varying the angle between the two tabs
of the 6-pole magnets.
g) Horizontal green and magenta lines are converged by varying the two tabs together.
keeping the angle between them constant.
- 2 2 -
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