DOWNLOAD Panasonic CT-34WX50 Service Manual ↓ Size: 10.31 MB | Pages: 58 in PDF or view online for FREE

Model
CT-34WX50
Pages
58
Size
10.31 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / PX1T
File
ct-34wx50.pdf
Date

Panasonic CT-34WX50 Service Manual ▷ View online

- 25 -
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.
*In case of problems with the vertical and/or H-SIZE,
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.
(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.
*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)
(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.
*Adjust so that the adjustment value for "EW-CORNER
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.
- 26 -
"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.
(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.
(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.
(Scale)
NTSC FULL WARM
DEF ADJ
H-POSITION
IIC
A
B
NTSC FULL WARM
DEF ADJ
H-SIZE
IIC
C
D
NTSC 4:3 WARM
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
- 27 -
"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.
 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.
 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.
F - E = 2 ± 5 (mm)
NTSC FULL WARM
DEF ADJ
SIDE-PCC
IIC
NTSC FULL WARM
DEF ADJ
H-PARALLEL
IIC
NTSC FULL WARM
DEF ADJ
H-LINEARITY
IIC
E
F
- 28 -
"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.
(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.
 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).
*When the "V-LINEARITY" is adjusted, also adjust the "V-
S CORRECTION" at the same time.
*Refer to page 30 for the "V-S CORRECTION" adjust-
ment.
NTSC FULL WARM
DEF ADJ
V-POSITION
IIC
G
H
NTSC FULL WARM
DEF ADJ
TRAPEZOID
IIC
NTSC FULL WARM
DEF ADJ
V-LINEARITY
IIC
I
J
G
H
G+H
NTSC FULL
220
202
422
1080i
223
199
422
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