Panasonic CT-34WX50 Service Manual ▷ View online
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3. Adjustment in NTSC "FULL" mode
(1) Receive an NTSC signal and set the aspect ratio to "FULL" mode.
(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 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.
SIZE, select "V/H-SIZE" and adjust.
*Center adjustment (V/H-SIZE) can be
speeded up by using the monoscope pattern
of the unit generating the signal.
speeded up by using the monoscope pattern
of the unit generating the signal.
(5) Adjust the vertical lines.
When the vertical lines of the built-in cross-
hatch pattern are bow-shaped or show paral-
lelogram distortion, select "SIDE-PCC", "H-
PARALLEL, and adjust so that the distorted
vertical lines become vertical to the horizontal
lines.
hatch pattern are bow-shaped or show paral-
lelogram distortion, select "SIDE-PCC", "H-
PARALLEL, and adjust so that the distorted
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 pat-
tern is not uniform, select "V-LINEARITY", "V-
S CORRECTION", and adjust for a good bal-
ance of the interval between the horizontal
lines.
horizontal lines of the built-in cross-hatch pat-
tern is not uniform, select "V-LINEARITY", "V-
S CORRECTION", and adjust for a good bal-
ance 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 completion of the adjustment. (Only V-POSITION, amplitude)
are adjusted to the top (bottom), so that the position of the screen center changes. Accordingly, the center adjustment must be
adjusted again after completion of the adjustment. (Only V-POSITION, amplitude)
(7) Perform adjustment of the H-LINEARITY.
Refer to page 27, confirm that the adjustment
point of the built-in cross-hatch pattern
matches the specified value, and adjust if
required.
point of the built-in cross-hatch pattern
matches the specified value, and adjust if
required.
(8) 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 bottom, select "PCC",
"EW-CORNER TOP", or "EW-CORNER
BOTTOM", and adjust so that the distorted
vertical lines become straight lines.
hatch pattern shows pincushion distortion or
distortion at the top or bottom, select "PCC",
"EW-CORNER TOP", or "EW-CORNER
BOTTOM", and adjust so that the distorted
vertical lines become straight lines.
(9) After completion of adjustment, end the service adjustment mode, Receive an NTSC signal in "FULL" aspect ratio, and con-
firm 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 29.
*"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 28.
*"V-S CORRECTION" adjustment method
Refer to page 30.
*"H-LINEARITY" adjustment method
Refer to page 27.
*"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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Q
R
Q = R
7.0 ± 0.5
(cm)
4. Adjustment in NTSC "NORMAL" mode
(1) Receive an NTSC signal and set the aspect ratio to "NORMAL" mode.
(2) Enter into service adjustment mode and select the Concurrent mode "DEF ADJ".
(3) For "SIDE-PCC", "H-PARALLEL", "V-POSITION", "TRAPEZOID", "V-LINEARITY", "V-SIZE", "EW-CORNER
TOP", "EW-
CORNER
BOTTOM", and "V-S CORRECTION", enter the same adjustment values as for the adjusted NTSC "FULL" mode
with the "Volume +, Volume - " buttons on the remote control.
(4) Receive the built-in cross-hatch pattern of this unit,
and if the image geometry shows pincushion distor-
tion or distortion at the top or bottom, select "PCC",
"EW-CORNER TOP", or "EW-CORNER BOTTOM",
and adjust so that the distorted vertical lines
become straight lines.
tion or distortion at the top or bottom, select "PCC",
"EW-CORNER TOP", or "EW-CORNER BOTTOM",
and adjust so that the distorted vertical lines
become straight lines.
(5) Confirm the image blanking width.
(6) Place a ruler against the surface of the picture tube and mea-
sure the measuring points Q and R (refer to the figure on the
right).
right).
(7) If the measuring results show that Q or R deviates from the
specified values of the figure on the right, adjust the "H-POSI-
TION" with the "Volume +, Volume -" buttons on the remote
control so that the blanking width reaches the specified value.
TION" with the "Volume +, Volume -" buttons on the remote
control so that the blanking width reaches the specified value.
*If the V-SIZE is not correct, select "V-SIZE" and perform
adjustment.
(Refer to page 29 for the "V-SIZE" adjustment method.)
adjustment.
(Refer to page 29 for the "V-SIZE" adjustment method.)
*Do not select "BLANKING START/END" for the effective
screen and perform adjustment.
screen and perform adjustment.
(8) After completion of the adjustment, Receive an NTSC signal with "NORMAL" mode for the aspect ratio and check the image.
Adjustment methods (specified values)
*"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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5. Adjustment in NTSC "ZOOM" mode
(1) Receive an NTSC signal and set the aspect ratio to "ZOOM" mode.
(2) Enter into service adjustment mode and select "DEF ADJ" in Concurrent mode.
*When entering into Concurrent mode, the screen position and the amplitude become standard.
(3) Press the button "
" of the remote control and receive a built-in cross-hatch pattern of this unit.
(4) For "H-POSITION", "H-SIZE", "SIDE-PCC", "H-PARALLEL", "V-POSITION", "PCC", "EW-CORNER
TOP", "EW-CORNER
BOTTOM", and "V-S CORRECTION", enter the same adjustment values as for the adjusted NTSC "FULL" mode with the "Vol-
ume +, Volume - " buttons on the remote control.
ume +, Volume - " buttons on the remote control.
(5) Check 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.
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.
*Center adjustment can be speeded up by using the
monoscope pattern of the unit generating the signal.
monoscope pattern of the unit generating the signal.
(6) 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.
(7) 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.
(8) Check the image geometry.
When the geometry of the built-in cross-hatch pattern
shows pincushion distortion or distortion at the top or
bottom, select "PCC", "EW-CORNER TOP", or "EW-
CORNER BOTTOM", and adjust so that the distorted
vertical lines become straight lines.
shows pincushion distortion or distortion at the top or
bottom, select "PCC", "EW-CORNER TOP", or "EW-
CORNER BOTTOM", and adjust so that the distorted
vertical lines become straight lines.
(9) After completion of adjustment, end the service adjustment mode, Receive an NTSC signal in "ZOOM" aspect ratio, and con-
firm 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 29.
*"SIDE-PCC" adjustment method
Refer to page 27.
*"H-PARALLEL" adjustment method
Refer to page 27.
*"V-LINEARITY" adjustment method
Refer to page 28.
*"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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6. Adjustment in NTSC "JUST" mode
(1) Receive an NTSC signal and set the aspect ratio to "JUST" mode.
(2) Enter into service adjustment mode and select "DEF ADJ" in Concurrent mode.
(3) For "H-POSITION", "SIDE-PCC", "H-PARALLEL", "V-POSITION", "TRAPEZOID", and "PCC", enter the same adjustment val-
ues as for the adjusted NTSC "FULL" mode with the "Volume +, Volume - " buttons on the remote control.
(4) Press the button "
" on the remote control and receive the built-in cross-hatch pattern of this unit.
(5) Check 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.
hatch pattern.
*In case of problems with the vertical and/or horizontal amplitude, select "V/H-SIZE" and adjust.
*Center adjustment (V/H-SIZE) can be speeded up by using the monoscope pattern of the unit generating the signal.
(6) Check the image geometry.
When the geometry of the built-in cross-hatch pattern
shows pincushion distortion or distortion at the top or
bottom, select "PCC", "EW-CORNER TOP", or "EW-
CORNER BOTTOM", and adjust so that the distorted
vertical lines become straight lines.
shows pincushion distortion or distortion at the top or
bottom, select "PCC", "EW-CORNER TOP", or "EW-
CORNER BOTTOM", and adjust so that the distorted
vertical lines become straight lines.
(7) After completion of adjustment, end the service adjust-
ment mode, Receive an NTSC signal in "JUST" mode
for the aspect ratio, and confirm the image.
for the aspect ratio, 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 29.
*"H-SIZE" adjustment method
Refer to page 26.
*"PCC" adjustment method
Refer to page 28.
*"EW-CORNER TOP" adjustment method
Refer to page 30.
*"EW-CORNER BOTTOM" adjustment method
Refer to page
30.
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