Sony KV-29C3A Service Manual ▷ View online
— 21 —
KV-29C3
GRN
BLU
RED
Fig.3-4
Fig.3-5
3-2. CONVERGENCE
(1) Screen center convergence
(Static convergence)
1.
Input a dot signal from the pattern generator. Normalize the
picture setting.
picture setting.
2.
(Moving horizontally), adjust the H.STAT control so that
the horizontal red, green and blue dots coincide at the
center of screen.
the horizontal red, green and blue dots coincide at the
center of screen.
3.
(Moving vertically), adjust the V.STAT magnet so that the
vertical red, green and blue points coincide at the center of
screen.
vertical red, green and blue points coincide at the center of
screen.
• If the horizontal dots are unable to coincide with the
variable range of the H.STAT convergence, adjust together
with the V.STAT convergence while tracking.
(Adjust the convergence by tilting the V.STAT convergence
or by opening or closing the V.STAT convergence.)
with the V.STAT convergence while tracking.
(Adjust the convergence by tilting the V.STAT convergence
or by opening or closing the V.STAT convergence.)
(Open)
(Close)
2By rotating the V. STAT magnet counterclockwise, the
red, green and blue dots move as shown below.
4. Movement of the red, green and blue dots by tilting the
V.STAT magnet and by opening or closing the V.STAT
magnet.
magnet.
1 By opening or closing the V.STAT magnet, the red, green
and blue points move as shown below
Deflection yoke positioning
corrects these areas
corrects these areas
Purity control corrects
this area.
this area.
Disk magnets or
rotatable disk
magnets correct
these areas (a-d).
rotatable disk
magnets correct
these areas (a-d).
RV3701
Screen (G2)
Screen (G2)
Blue
Red
Green
V.STAT
Magnete statico verticale
H.STAT
convergence
control
RV3702 (H.STAT)
H.STAT convergence
H.STAT convergence
C Board
B
G
R
B
G
R
B
G
R
— 23 —
KV-29C3
3-3. Focus
1. Receive a television broadcast signal.
2. Normalize the picture setting.
3. Adjust the focus control on the flyback transformer for the
2. Normalize the picture setting.
3. Adjust the focus control on the flyback transformer for the
best focus at the center of the screen.
Bring only the center area of the screen into focus,
the magenta-ring appears on the screen. In this case, adjust
the focus to optimize the screen uniformly.
Bring only the center area of the screen into focus,
the magenta-ring appears on the screen. In this case, adjust
the focus to optimize the screen uniformly.
FOCUS
3-4. Screen (G2), White balance
(Adjustment in the service mode with
remote commander)
remote commander)
G2 adjustment (RV3701)
1.
Input a dot signal from the pattern generator.
2.
Set the Picture, Brightness and Colour to minimum.
3.
Apply 170V DC from an external power supply to the
R, G and B cathodes of the CRT.
R, G and B cathodes of the CRT.
4.
While watching the picture, adjust the G2 control
RV3701 [ SCREEN ] on the C board to the point just
before the return lines disappear.
RV3701 [ SCREEN ] on the C board to the point just
before the return lines disappear.
White balance adjustment
1.
Receive an all-white signal.
2.
Enter into the Service Mode by pressing ' TEST ',
' TEST ' and ' MENU' on the Service Commander.
' TEST ' and ' MENU' on the Service Commander.
3.
Select ' VIDEO PROC. ' from the on screen menu display
and press OK .
and press OK .
4.
The ' VIDEO PROC TDA4780' menu will appear on the
screen.
screen.
Video Proc. TDA4780
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5.
Set picture to MAX.
6.
Set the ' R GAIN ' to 25.
7.
Adjust the ' G GAIN ' and ' B GAIN ' so that the white
balance becomes optimum.
balance becomes optimum.
8.
Press the OK button to write the data for each item.
9.
Set picture to MIN.
10. Set the ' R LVL REF ' to 31.
11. Adjust ' G LVL REF ', and ' B LVL REF '
11. Adjust ' G LVL REF ', and ' B LVL REF '
with the left and right buttons so that the white balance
becomes optimum.
becomes optimum.
12. Press the OK button to write the data for each item.
— 24 —
KV-29C3
SECTION 4
CIRCUIT ADJUSTMENTS
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Fig. 4-3
Headphone
jack
AV3
Input jacks
AV INPUT
VOL
PROG
+
+
-
-
4-1. ELECTRICAL ADJUSTMENTS
Service adjustment to this model can be performed with the supplied
remote commander, RM-862.
remote commander, RM-862.
HOW TO ENTER INTO SERVICE MODE
1.
Turn on the main power switch of the set while pressing the
PROG + (plus) and PROG
PROG + (plus) and PROG
-
(minus) buttons on the front panel.
2.
“TT” will appear on the upper right corner of the screen.
3.
Press " MENU " on the commander to get the service menu on
screen.
screen.
4.
Push the joystick up (green) or down (blue) on the remote
commander to select the adjustment item.
commander to select the adjustment item.
5.
Press the center button to proceed to the next menu.
6.
If the adjustment item is 'Video Proc.', push the down button to
move to 'Video Proc.'.
move to 'Video Proc.'.
7.
The Menu as indicated in Fig 4-3 will appear on the screen.
8.
Move the joystick up or down to move to the adjustment item and
press the center (OK) button.
press the center (OK) button.
9.
Change the data in order to comply with each standard.
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