Panasonic CT-34WX50 Service Manual ▷ View online
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7. 1080i adjustment
(1) Receive a 1080i.
(2) Enter into service adjustment mode and select "DEF ADJ" in Concurrent mode.
(3) Press the button "
" on the remote control and receive the built-in 1080i cross-hatch pattern of this unit.
(4) First, match the center of the built-in cross-hatch pattern
(center adjustment)
Select "V/H-POSITION", perform adjustment on the basis
of the specified values, and match the center of the built-in
cross-hatch pattern.
Select "V/H-POSITION", perform adjustment on the basis
of the specified values, and match the center of the built-in
cross-hatch pattern.
*In case of problems with the vertical and/or H-SIZE,
select "V/H-SIZE" and adjust.
select "V/H-SIZE" and adjust.
(5) Adjust the vertical lines.
When the vertical lines of the built-in cross-hatch pattern
are bow-shaped or show parallelogram distortion, select
"SIDE-PCC", "H-PARALLEL", and adjust so that the dis-
torted vertical lines become vertical to the horizontal lines.
are bow-shaped or show parallelogram distortion, select
"SIDE-PCC", "H-PARALLEL", and adjust so that the dis-
torted vertical lines become vertical to the horizontal lines.
(6) Adjust the horizontal lines.
When the interval between two neighboring horizontal
lines of the built-in cross-hatch pattern is not uniform,
select "V-LINEARITY", "V-S CORRECTION", and adjust
for a good balance of the interval between the horizontal
lines.
lines of the built-in cross-hatch pattern is not uniform,
select "V-LINEARITY", "V-S CORRECTION", and adjust
for a good balance of the interval between the horizontal
lines.
*When "V-LINEARITY", "V-S CORRECTION" adjustment
is performed, the horizontal lines of the built-in cross-
hatch pattern are adjusted to the top (bottom), so that the
position of the screen center changes. Accordingly, the
center adjustment must be adjusted again after comple-
tion of the adjustment. (Only V-POSITION, amplitude)
is performed, the horizontal lines of the built-in cross-
hatch pattern are adjusted to the top (bottom), so that the
position of the screen center changes. Accordingly, the
center adjustment must be adjusted again after comple-
tion of the adjustment. (Only V-POSITION, amplitude)
(7) Perform adjustment of the image geometry.
When the geometry of the built-in cross-hatch pattern
shows pincushion distortion or distortion at the top or bot-
tom, select "PCC", "EW-CORNER TOP", or "EW-COR-
NER BOTTOM", and adjust so that the distorted vertical
lines become straight lines.
shows pincushion distortion or distortion at the top or bot-
tom, select "PCC", "EW-CORNER TOP", or "EW-COR-
NER BOTTOM", and adjust so that the distorted vertical
lines become straight lines.
*Adjust so that the adjustment value for "EW-CORNER
TOP" and "EW-CORNER BOTTOM" becomes a value
from 5 to 11.
TOP" and "EW-CORNER BOTTOM" becomes a value
from 5 to 11.
(8) After completion of adjustment, end the service adjustment mode, Receive a 1080i, and confirm the image.
8
Adjustment methods (specified values)
*"V-POSITION" adjustment method
Refer to page 28.
*"H-POSITION" adjustment method
Refer to page 26.
*"V-SIZE" adjustment method
Refer to page 26.
*"H-SIZE" adjustment method
Refer to page 26.
*"SIDE-PCC" adjustment method
Refer to page 27.
*"H-PARALLEL" adjustment method
Refer to page 27.
*"V-LINEARITY" adjustment method
Refer to page 27.
*"V-S CORRECTION" adjustment method
Refer to page 30.
*"PCC" adjustment method
Refer to page 29.
*"EW-CORNER TOP" adjustment method
Refer to page 30.
*"EW-CORNER BOTTOM" adjustment method
Refer to
page 30.
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"H-POSITION" adjustment
"H-SIZE" adjustment
When there is a monoscope pattern
Press the "Volume +, Volume - " buttons on the remote
control and adjust so that the center of the vertical lines of
the built-in cross-hatch pattern becomes stable at the
specified value of the following table.
the built-in cross-hatch pattern becomes stable at the
specified value of the following table.
(mm)
Press the "Volume +, Volume - " buttons on the remote
control and adjust so that the position 5 lines to the left
from the center of the vertical lines of the built-in cross-
hatch pattern... (C) and the position 5 lines to the right
from the center... (D) becomes stable at the specified
value of the following table.
from the center of the vertical lines of the built-in cross-
hatch pattern... (C) and the position 5 lines to the right
from the center... (D) becomes stable at the specified
value of the following table.
(mm)
Press the "Volume +, Volume - " buttons on the remote
control and adjust so that the left (
and the right (
') end
of the scale at the sides of the received monoscope pat-
tern for each aspect ratio becomes stable at the specified
value of the following table.
tern for each aspect ratio becomes stable at the specified
value of the following table.
(Scale)
NTSC FULL WARM
DEF ADJ
H-POSITION
DEF ADJ
H-POSITION
IIC
A
B
NTSC FULL WARM
DEF ADJ
H-SIZE
DEF ADJ
H-SIZE
IIC
C
D
NTSC 4:3 WARM
DEF ADJ
H-SIZE
DEF ADJ
H-SIZE
A
B
A+B
NTSC FULL
396
354
750
1080i
380
378
758
C
D
C+D
NTSC FULL
284
274
558
1080i
272
262
534
’
NTSC FULL
2.5±0.1
NTSC ZOOM
2.5±0.2
NTSC JUST
2.8±0.1
8. Adjustment methods for distortion correction
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"SIDE-PCC" correction
"H-PARALLEL" adjustment
"H-LINEARITY" adjustment
When the vertical lines of the built-in cross-hatch pattern
show bow-shaped distortion (like the dotted lines in the
figure on the left), use the center of the vertical lines as
reference, press the "Volume +, Volume - " buttons on the
remote control and adjust so that the reference line
becomes a straight line.
figure on the left), use the center of the vertical lines as
reference, press the "Volume +, Volume - " buttons on the
remote control and adjust so that the reference line
becomes a straight line.
When the lines at the left and right edge have a parallelo-
gram component (like the dotted lines in the figure on the
left), use the center of the vertical lines as reference,
press the "Volume +, Volume - " buttons on the remote
control and adjust so that the reference line becomes a
vertical line.
left), use the center of the vertical lines as reference,
press the "Volume +, Volume - " buttons on the remote
control and adjust so that the reference line becomes a
vertical line.
Press the "Volume +, Volume - " buttons on the remote
control and adjust so that the position 3 lines to the left
from the center of the vertical lines of the built-in cross-
hatch pattern... (E) and the position 3 lines to the right
from the center... (F) becomes stable at the specified
value of the following table.
from the center of the vertical lines of the built-in cross-
hatch pattern... (E) and the position 3 lines to the right
from the center... (F) becomes stable at the specified
value of the following table.
F - E = 2 ± 5 (mm)
NTSC FULL WARM
DEF ADJ
SIDE-PCC
DEF ADJ
SIDE-PCC
IIC
NTSC FULL WARM
DEF ADJ
H-PARALLEL
DEF ADJ
H-PARALLEL
IIC
NTSC FULL WARM
DEF ADJ
H-LINEARITY
DEF ADJ
H-LINEARITY
IIC
E
F
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"V-POSITION" adjustment
"TRAPEZOID" adjustment
"V-LINEARITY" adjustment
Press the "Volume +, Volume - " buttons on the remote
control and adjust so that the center of the horizontal lines
of the built-in cross-hatch pattern becomes stable at the
specified value of the following table.
of the built-in cross-hatch pattern becomes stable at the
specified value of the following table.
(mm)
When the vertical lines of the built-in cross-hatch pattern
show trapezoidal distortion (refer to the dotted lines in the
figure on the left), use the vertical lines on the outside as
reference, press the "Volume +, Volume - " buttons on the
remote control and adjust so that the reference line
becomes a vertical line.
figure on the left), use the vertical lines on the outside as
reference, press the "Volume +, Volume - " buttons on the
remote control and adjust so that the reference line
becomes a vertical line.
Press the "Volume +, Volume - " buttons on the remote
control and adjust so that the line interval between adja-
cent horizontal lines in the upper half and in the lower half
of the built-in cross-hatch pattern becomes uniform (I = J).
cent horizontal lines in the upper half and in the lower half
of the built-in cross-hatch pattern becomes uniform (I = J).
*When the "V-LINEARITY" is adjusted, also adjust the "V-
S CORRECTION" at the same time.
S CORRECTION" at the same time.
*Refer to page 30 for the "V-S CORRECTION" adjust-
ment.
ment.
NTSC FULL WARM
DEF ADJ
V-POSITION
DEF ADJ
V-POSITION
IIC
G
H
NTSC FULL WARM
DEF ADJ
TRAPEZOID
DEF ADJ
TRAPEZOID
IIC
NTSC FULL WARM
DEF ADJ
V-LINEARITY
DEF ADJ
V-LINEARITY
IIC
I
J
G
H
G+H
NTSC FULL
220
202
422
1080i
223
199
422
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