JVC AV-48WP34/AHA Service Manual page 42

AV-48WP30
Measuring
Item
instrument
SCREEN TILT Signal
generator
adjustment
CONVERGENCE
PWB
SERVICE SW
(S801)
[CONVERGENCE PWB]
RASTER Signal
CENTERING & generator
H.POSITION /
SIZE (coarse)
Remote
adjustment
control unit
L1=30mm
36
Test point Adjustment part
SERVICE SW
(S801)
[CONVERGENCE
PWB]
G DEF. YOKE
R DEF. YOKE
B DEF. YOKE
[PROJECTION UNIT]
SERVICE SW
(S801)
[CONVERGENCE
PWB]
G CENTERING
magnet
R CENTERING
magnet
B CENTERING
magnet
[DEF. YOKE]
D03 : H-SIZE
D14 : H-CENTER
L2=30mm
No. 51914
Description
! Confirm correct FOCUS adjustment.
1. It pushes a power switch while pushing SERVICE SW S801 on
the CONVERGENCE PWB then it makes picture without
convergence operation.
2. Receive a cross-hatch signal.
3. 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.
4. 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.
5. 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. It pushes a power switch while pushing SERVICE SW S801 on
the CONVERGENCE PWB then it makes picture without
convergence operation.
2. Receive a circle & cross-hatch signal.
3. 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.
4. Select 1.PICTURE/SOUND from SERVICE MENU.
5. 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.
6. Select D14 ＜ H-CENTER ＞ and adjust H-CENTER to make the
screen center and signal center.
7. Select D03 ＜ H-SIZE ＞ and adjust H-SIZE to make screen
picture approx. 92% of H-SIZE.
8. Press the MUTING key on the remote control unit and
memorized all data.
9. Adjust the G CENTERING magnet to make horizontal and
vertical line center as mechanical center of screen.
10. Red and blue color, too, are reflected by it.
11. Using R CENTERING magnet and B CENTERING magnet,
adjusts for the line of the red and the blue to become the
position of the left figure.