Panasonic CT-110MA - Page 9

CT-11OMA/11OMCA
FIELD ALIGNMENT OF VIDEO MONITOR
Note: Use Video pattern Generator for following align 
ments. (Video input should read 1.0Vp-p)
A. WITHOUT TEST EQUIPMENT
Alignment can be accomplished by general procedures. The
following describes simple alignment methods that do not
require extensive service shop test equipment.
VERTICAL HEIGHT ADJUSTMENT
Adjust Vertical Height control (R402) until the picture or
test pattern is symmetrical from top to bottom.
COLOR PURITY ADJUSTMENT
(See figure 6, 7, 8 and 10.)
1. Operate the monitor for 20 minutes, with the Bright
control at maximum to warm up the CRT.
2. Degauss the monitor fully by using an external degaus 
sing coil.
3. Roughly adjust the convergence. (See page 8.)
4. Apply black and white pattern.
5. Turn the Red and Blue Cut-Off controls fully counter 
clockwise to obtain a green field. Adjust the R. Drive
controls if the green field cannot be obtained.
6. Loosen the deflection yoke clamp screw and move the
deflection yoke as close to the purity magnet as
possible.
7. Loosen the purity magnet clamp (See figure 7) and
adjust the purity magnet to set the vertical green raster
precisely at the center of the screen. (See figure 8.)
Then tighten the clamp.
8. Slowly move the deflection yoke forward and adjust
for the best overall green screen.
9. Tighten the deflection yoke clamp screw.
10. Produce a blue and red raster with the Cut-Off controls
and observe that good purity is obtained on the re 
spective field.
11. Observe that a uniform white raster is obtained by
adjusting the R.G.B. Cut-Off controls. If the screen
is not uniformly white, repeat the above procedure.
COLOR TEMPERATURE ADJUSTMENT
(See figure 9 and 10.)
1. Use a black and white video pattern.
2. Turn the R, G, and B Cut-Off controls fully counter 
clockwise, and then turn each forward (clockwise) 90°.
3. Turn the Screen Control (R550) fully counterclockwise
and set Service Switch to the Service position.
4. Turn the Screen Control clockwise slowly , until any one
of the R, G, or B lines just becomes visible.
(See figure 9.)
End of CY
17.2 + 0.5 mm
Position of
Convergence Yoke
CRT Pin Base
Figure 6
Figure 8 Figure 9
5. Turn the other two Cut-Off controls (for the colors
which did not appear on the screen) slowly clockwise, so
they also become just visible.
(Adjust one control and color line at a time.)
6. Set the Service Switch in the Normal position.
7. Turn the Bright and Panabrite controls to maximum.
8. Adjust the drive controls to obtain a white raster at
maximum brightness.
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