- 25 -
Service Manual
6.
If the position of the dots at the center of the screen
moves from the position noted in step 4., adjust the
alignment magnets until the dots are in the same
position as noted in step 4.
7.
Turn the red electrical focus adjustment VR (on
focus pack) fully counterclockwise and confirm that
the position of the dots at the center of the screen
did not move from their position noted in step 4.
8.
If the position of the dots at the center of screen
moved, repeat from step 4.
9.
If the position of the dots moved after repeated
adjustments, adjust until the movement of the dots
is minimized.
10. Turn the red focus VR fully clockwise.
11. Adjust the 4-pole magnets until the shape of the
dots at the center of the screen is circular.
12. Adjust red focus VR until optimum focus is
achieved.
13. Apply NTSC crosshatch with dots or any other
available pattern applicable to the following.
14. Confirm that the picture is correctly aligned in the
center of the screen, shown in figure 33, adjust the
centering magnets. Repeat the alignment magnet
adjustments and four pole magnet adjustments
(step 1. ~ step 12.).
15. Apply an NTSC cross hatch pattern with dots.
16. Set VIDEO “C_OFF” DAC from 00 to 01, to project
green only.
17. Repeat above procedures for the green.
18. Set VIDEO “C_OFF” DAC from 00 to 02, to project
red only.
19. Repeat above procedures for the blue.
20. Enable digital convergence by changing DAC
MUTE from 01 to 00.
21. Following
adjustments,
paint
position
of
DY
centering magnets and fix the centering magnets of
DY, dummy rings of VM coil, four pole magnets of
VM coil and the alignment magnets of VM coil to
prevent them from moving.
Note:
Please
See
“Service
mode
(electronic
controls)” on page 34 for entering and exiting
service mode.
NTSC Vertical size adjustment (VSIZE)
Note:
1080i, 480p, 480i pattern can be obtained from
Panasonic’s
TU-DST51
set-top
box
DTV
decoder.
1.
Apply a NTSC pattern (see avobe note) .
2.
Set VIDEO “C_OFF” DAC from 00 to 01
(to project only green).
3.
Adjust centering magnets so that the center of the
pattern get aligned with screen frame center.
4.
Adjust VDEF “VSIZE” DAC until vertical size is
proportional on top and bottom. (See figure 34)
5.
Set VIDEO “C_OFF” DAC from 01 to 00
HD 1080i Vertical size adjustment (VSIZE)
Note:
1080i, 480p, 480i pattern can be obtained from
Panasonic’s
TU-DST51
set-top
box
DTV
decoder.
1.
Apply a HD 1080i pattern (see avobe note).
2.
Repeat vertical size adjustment from step 2
Figure 33. Centering magnet
Panasonic
FORMAT
Figure 34. Vertical size adjustment
Figure 35. Vertical size adjustment
Panasonic
FORMAT