5 Alignment and Adjustments
5. After completing the red and blue center1. Make sure the display is not affected by
convergence adjustment, locate the pair of external magnetic fields.
6-pole magnet rings.
2. Make sure the static convergence is properly
6. Rotate the individual rings (change theadjusted.
spacing between tabs) to converge the vertical
3. Strategically place small rubber magnets on
red and blue (magenta) and green lines.
the back of the CRT to correct the
7. Rotate the pair of rings (maintaining themisconvergence. Be careful not to remove the
spacing between tabs) to converge thepaper protecting the adhesive on the magnets
horizontal red and blue (magenta) and greenuntil you are satisfied with their placement
lines. DonOt rotate the 2-pole magnets as theyand the dynamic convergence.
adjust for color purity.
4. When you are satisfied with the convergence
8. Mark the correct position for the magnets andaround the edge of the CRT, permanently glue
apply a small line of glue to hold the magnetsthe magnets to the back of the CRT.
in place. Lock the rings in place.
WARNING: Do not remove or change the
5-4-2 Dynamic (Edge) Convergence
position of the factory installed
wedges. These wedges were
Use the following procedure to correct minor
installed by the CRT manufacturer
dynamic (edge) misconvergence. If, after using!
and are properly placed for this
this procedure, dynamic misconvergence around
CRT; their removal may result in
the periphery of the display area is still greater
damage to the CRT.
than the tolerance, contact the Regional After
Service Center for possible CRT replacement.
Figure 5-14. Magnet Movements
Red and Blue AlignmentRed, Blue and Green Alignment
(4-pole magnet movement)(6-pole magnet movement)
O-Magnetic
R BVERTICAL
FieldMG
MISALIGNMENT(1) SPREAD
BG
TAB
R
MAGNET
HORIZONTAL
RB
MISALIGNMENT
Motion (1)
ORR BM G
BG
R
RB
SHIFT DIRECTION OF
CROSSHATCH PATTERN
Motion (2)
R BMG
BG
MOVER
TOGETHER
M
SHIFT DIRECTION OF
CROSSHATCH PATTERN
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