- 27 -
Service Manual
6.
Confirm that measurement of “A” has not changed.
7.
Enable digital convergence by changing DAC
MUTE from 01 to 00.
8.
Set VIDEO “C_OFF” DAC from 01 to 00.
HD 1080i Pincushion adjustment (PCC)
Note:
1080i, 480p, 480i pattern can be obtained from
Panasonic’s
TU-DST51
set-top
box
DTV
decoder.
Procedure:
1.
Apply a HD 1080i pattern.
2.
Repeat NTSC pincushion adjustment from step 2
Centering magnets adjustment
Note:
1080i, 480p, 480i pattern can be obtained from
Panasonic’s
TU-DST51
set-top
box
DTV
decoder.
Procedures:
1.
Apply a NTSC crosshatch pattern with dots.
2.
Set VIDEO “C_OFF” DAC from 00 to 01 to project
only green.
3.
Set DAC MUTE from 00 to 01 (disabling digital
convergence).
4.
Loosen the deflection coil screw on the green CRT.
5.
Adjust green deflection coil until the horizontal
center line is horizontal.
6.
Adjust centering magnets until the green pattern is
equal on left and right. Adjust also for horizontal
and vertical tilt.
Note: Push deflection coil to top of CRT neck,
then tighten deflection screw after adjusting
each CRT centering and tilt.
7.
Set VIDEO “C_OFF” DAC from 01 to 03 to project
only blue. Adjust deflection coil until the horizontal
center line matches the pattern of the grid and is
leveled.
8.
Adjust blue centering magnets until the pattern
center is at the appropriate distance as indicated
on figure 40.
Figure 40. Centering magnets adjustment.
9.
Set VIDEO “C_OFF” DAC from 01 to 02 to project
only red.
10. Adjust red deflection coil until the horizontal center
line matches the pattern of the grid and is leveled.
11. Adjust red centering magnets until the pattern
center is at the appropriate distance as indicated
on figure 40.
12. Enable digital convergence by changing DAC
MUTE from 01 to 00.
13. Set VIDEO “C_OFF” DAC from 02 to 00. Following
the adjustment, make sure that all deflection coils
are pushed completely toward the CRT cones and
that all screws are tightened.
NTSC Horizontal size adjustment (H WID)
Note:
1080i, 480p, 480i pattern can be obtained from
Panasonic’s
TU-DST51
set-top
box
DTV
decoder.
This adjustment is intended to adjust horizontal size of
the picture.
1.
Apply a NTSC pattern.
2.
Set VIDEO “C_OFF” DAC from 00 to 01 to project
only green.
3.
Set DAC MUTE from 00 to 01 (disabling digital
convergence).
4.
In service mode, adjust H-WID DAC until the
picture horizontal size is balanced at left and right
side of screen.
5.
Set DAC MUTE from 01 to 00 (disabling digital
convergence).
6.
Set VIDEO “C_OFF” DAC from 01 to 00.
HD 1080i Horizontal size adjustment
(H WID)
Note:
1080i, 480p, 480i pattern can be obtained from
Panasonic’s
TU-DST51
set-top
box
DTV
decoder.
This adjustment is intended to adjust horizontal size of
the picture.
1.
Apply a HD 1080i pattern.
2.
Repeat NTSC horizontal size adjustment from
step 2.
Convergence adjustment
Note:
1080i, 480p, 480i pattern can be obtained from
Panasonic’s
TU-DST51
set-top
box
DTV
decoder.
Turn PTV on and allow it to warm up for 30
minutes prior to making adjustments
(WHITE PATTERN).
Note:
This PTV uses the scheme described below to
correct for misconvergence of the three CRT
projection tubes. There are various modes to
this operation.
Preparation:
Place
the
convergence
alignment template
(see
“Convergence alignment template” on page 33) over
the PTV screen. Align the center lines of the template
with the mechanical center markers on the PTV screen
R
G
d
d
28 mm
d measured in mm
B
Note:
It is strongly recommended to first read and
understand the following section prior to
make any adjustment.
Convergence adjustment must be perform
for 480i-p (same for interlace & progressive),
1080i and ZOOM 480i.