CT-34WX50 - Panasonic TV Service Manual (repair manual). Page 21

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(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.

*In case of problems with the vertical and/or H-
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.

(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.

(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.

*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)

(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.

(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.

(9) After completion of adjustment, end the service adjustment mode, Receive an NTSC signal in "FULL" aspect ratio, and con-

firm the image.

8

*"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.