NEC MultiSync 2A Service Manual page 18

Purity, Convergence Magnet Assembly (PCM)
R
B
I
Perform the adjustment by opening
�
the angle between the t abs
I
_ l_
B-----1
R
Perform the adjustment by synchronous
rotation of the two tabs.
Red to Blue Convergence
(Magenta)
(8) Convergence Adjustment
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 crosshatch 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.
Purity Magnets
to
4-pole magnets (Red Blue
6-pole magnets (Green to Magenta
29.±1
mm
B/RG
� 1
.
- - - �
1
I
Green to Magenta Convergence
(White)
- 16 -
Convergence)
Convergence)
P er orm t e a 1ustment h d. b
y opening
1·
the angle between the tabs.
I
-
Perform the adjustment by synchronou s
rotation of the two tabs.
·