DOWNLOAD Panasonic CT-34WDM60 Service Manual ↓ Size: 1.4 MB | Pages: 46 in PDF or view online for FREE

- 33 -

!"#$

- 34 -

When IC401 etc. on the F-Board has been exchanged and the H/V-POSITION of the picture,  the amplitude, etc. is to be cor-
rected, select "DEF ADJ" in IIC mode and adjust the deflection system. "DEF ADJ" has 14 items (sub-items of the IIC mode)
and adjustment of the image details is possible for each mode/aspect.
The contents of "

 Adjustment methods for distortion correction" on pages 40 to 45 are mainly the adjustment contents

required for use of the offset function (using the built-in cross-hatch pattern). In addition, the adjustment methods using the
monoscope pattern for improvement of the adjustment accuracy also are shown.

*

:NTSC "FULL" adjustment value should be adjusted.

*

:HDTV1080i adjustment value should be adjusted.

*

"x": Can not be adjusted.

6

H-POSITION

H-SIZE

SIDE-PCC

H-PARALLEL

H-LINEARITY

V-POSITION

TRAPEZOID

V-LINEARITY

V-SIZE

PCC

EW-CORNER·TOP

EW-CORNER·BOTTOM

V-S CORRECTION

FULL

Sub-Item

Main-Item

DEF.ADJ.

NORMAL

ZOOM

JUST

NTSC

HDTV1080i

+4

-1

+1F

+F

-1

+F

+3

+2

+2

+1

+1

+1

H-POSITION

H-SIZE

SIDE-PCC

H-PARALLEL

H-LINEARITY

V-POSITION

TRAPEZOID

V-LINEARITY

V-SIZE

PCC

EW-CORNER·TOP

EW-CORNER·BOTTOM

V-S CORRECTION

FULL

Sub-Item

Main-Item

DEF.ADJ.

NORMAL

ZOOM

JUST

NTSC

HDTV1080i

+4

-1

+1F

+F

-1

+F

+3

+2

+2

+1

+1

+1

!"#$

- 35 -

(1) Input an NTSC signal and set the aspect ratio to "FULL" mode.

(2) Enter into service adjustment mode and select "DEF ADJ" in IIC 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", "V-LINEARITY" 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 completion of the
adjustment. (Only V-POSITION, amplitude)

(7) Perform adjustment of the H-LINEARITY.

Refer to page 41, 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, Input an NTSC signal in "FULL" aspect ratio, and confirm

the image.

8

*"V-POSITION" adjustment method 

→

 Refer to page 42.

*"H-POSITION" adjustment method 

→

 Refer to page 40.

*"V-SIZE" adjustment method 

→

 Refer to page 43.

*"H-SIZE" adjustment method 

→

 Refer to page 40.

*"SIDE-PCC" adjustment method 

→

 Refer to page 41.

*"H-PARALLEL" adjustment method 

→

 Refer to page 41.

*"V-LINEARITY" adjustment method 

→

 Refer to page 42.

*"V-S CORRECTION" adjustment method 

→

 Refer to page 44.

*"H-LINEARITY" adjustment method 

→

 Refer to page 41.

*"PCC" adjustment method 

→

 Refer to page 43.

*"EW-CORNER TOP" adjustment method 

→

 Refer to page 44.

*"EW-CORNER BOTTOM" adjustment method 

→

 Refer to page 44.

!"#$

- 36 -

Q

R

Q = R

7.0 ± 0.5

(cm)

(1) Input an NTSC signal and set the aspect ratio to "NORMAL" mode.

(2) Enter into service adjustment mode and select the IIC 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 "

, 

" buttons on the remote control. (Refer to page 34)

(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 BOT-
TOM", 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).

(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 "

, 

" 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 40 for the "V-SIZE" adjustment method.)

*Do not select "BLANKING START/END" for the effective
screen and perform adjustment.

(8) After completion of the adjustment, input an NTSC signal with "NORMAL" mode for the aspect ratio and check the image.

*"PCC" adjustment method 

→

 Refer to page 43.

*"EW-CORNER TOP" adjustment method 

→

 Refer to page 44.

*"EW-CORNER BOTTOM" adjustment method 

→

 Refer to page 44.

!"#$