JVC AV-56WP74 Service Manual page 49

3.8.4.2 PREPARATION
Measuring
Item
instrument
SCREEN TILT Signal
generator
adjustment
Remote
control unit
1. PICTER/SOUND menu
Select item
RASTER Signal
generator
CENTERING &
H. POSITION /
Remote
SIZE (coarse)
control unit
adjustment
L1
L1=30mm
Test point Adjustment part
[1.PICTURE/SOUND]
F62 : Without
convergence operation
G DEF. YOKE
R DEF. YOKE
B DEF. YOKE
[PROJECTION UNIT]
F62 0
Change value
0 1
[1.PICTURE/SOUND]
D03 : H. SIZE
D14 : H. CENTER
F62 : Without
convergence operation
G CENTERING
magnet
R CENTERING
magnet
B CENTERING
magnet
[DEF. YOKE]
R G B
L2
L2=45mm
Description
• Confirm correct FOCUS adjustment.
(1) Receive NTSC cross-hatch signal.
(2) Select 1. PICTURE/SOUND from SERVICE MENU.
(3) Select <F62> (Without convergence operation) with
[CH +] / [CH -] keys.
(4) Change the data 0 to 1, then it makes picture without
convergence operation.
(5) Makes a green single color.
NOTE :
When making a single color, It squeezes SCREEN
VR in each one, or it does a lid to the lens in the
adjustment color and it makes it single color.
(6) Temporarily secure the G deflection yoke to the top
of the neck and adjust the tilt of the deflection yoke
so that the horizontal line at the center becomes flat.
After adjustment, fasten the temporal screw.
(7) Adjust the tilt of the R and B deflection yokes in the
same manner as for green.
NOTE :
Make sure that the adjustment of CRT FOCUS is
optimized at the center and at the fringe of the center
in turn. If the proper adjustment has not been done,
adjust FOCUS VR again.
(1) Receive NTSC circle (or cross-hatch) signal.
(2) Select 1. PICTURE/SOUND from SERVICE MENU.
(3) Select <F62> (Without convergence operation) with
[CH +] / [CH -] keys.
(4) Change the data 0 to 1, then it makes picture without
convergence operation.
(5) Makes a green single color.
NOTE :
When making a single color, it squeezes SCREEN
VR in each one, or it does a lid to the lens in the
adjustment color and it makes it single color.
(6) Select <D03> (H. SIZE) and shorten the level until
and perpendicular amplitude of vibration with until
the blanking in Left and Right and on either side can
be seen.
(7) Select <D14> (H. CENTER) and adjust horizontal
position to make the screen center and signal
center.
(8) Select <D03> and adjust horizontal size to make
screen picture approx. 92% of H-SIZE.
(9) After adjustment, select <F62> and change the data
1 to 0.
(10) Press [MUTING] key and memorize the set value.
(11) Adjust G CENTERING magnet to make horizontal
and vertical line center as mechanical center of
screen.
(12) Red and blue color too, are reflected by it.
(13) Using R CENTERING magnet and B CENTERING
magnet, adjusts for the line of the red(L1) and the
blue(L2) to become the position of the left figure.
NOTE :
Vertical center position of the red and blue are the
same as green.
AV-48WP74
AV-56WP74
(No.52105)1-49