Samsung SYNCM.400B Service Manual page 48

5-4-1 Static (Center) Convergence
Static convergence involves alignment of the red,
blue and green lines in the center area of the
display.
See "Dynamic Convergence" for alignment of
color fields around the edges of the display.
CONDITIONS
Direction: Monitor facing east
Warm-up: 30 minutes
Display image: Crosshatch pattern
Tolerances: See Table 5-5
PROCEDURE
As shown in Figure 5-9, the CRT used in this
monitor has the magnet configuration as shown in
Table 5-6.
Table 5-5. Magnet Configurations
CRT Manufacturer Magnet Order from Front of CRT
Toshiba Convergence bow, 2-pole,
6-pole, 4-pole
Use the following steps to correct any static
misconvergence:
1. Locate the pair of 4-pole magnet rings.
2. Unlock the rings and rotate the individual
rings (change the spacing between tabs) to
converge the vertical red and blue lines.
3. Rotate the pair of rings (maintaining spacing
between tabs) to converge the horizontal red
and blue lines.
4. After completing the red and blue center
convergence adjustment, locate the pair of 6-
pole magnet rings.
5. Rotate the individual rings (change the
spacing between tabs) to converge the vertical
red and blue (magenta) and green lines.
6. Rotate the pair of rings (maintaining the
spacing between tabs) to converge the
horizontal red and blue (magenta) and green
lines. Don't rotate the 2-pole magnets as they
adjust for color purity.
7. Mark the correct position for the magnets and
apply a small line of glue to hold the magnets
in place. Lock the rings in place.
CKA42*7L/5227L
5-4-2 Dynamic (Edge) Convergence
CONDITIONS
Direction: Monitor facing east
Warm-up: 30 minutes
Display image: Crosshatch pattern
Tolerances: See Table 5-5
PROCEDURE
Use the following procedure to correct minor
dynamic (edge) misconvergence. If, after using
this procedure, dynamic misconvergence is still
greater than the tolerance around the periphery of
the display area, contact the Regional After
Service Center for possible CRT replacement.
1. Make sure the display is not affected by
external magnetic fields.
2. Make sure the static convergence is properly
adjusted.
3. Strategically place small magnet rubbers on
the back of the CRT to correct the
misconvergence. Be careful not to remove the
paper protecting the adhesive on the magnet
rubbers until you are satisfied with their
placement and the dynamic convergence.
4. When you are satisfied with the convergence
around the edge of the CRT, permanently glue
the magnet rubbers to the back of the CRT.
WARNING: Do not remove or change the
position of the factory installed
wedges. These wedges were
!
installed by the CRT manufacturer
and are properly placed for this
CRT; their removal may result in
damage to the CRT.
5 Alignment and Adjustments
5-11