27
KV-29FX11
a-d: screen-corner
convergence defect
a
b
c
d
c
a
d
b
Install the permalloy assembly
for the area that needs correcting.
Permalloy.
Focus
(3)
Screen corner convergence.
•
If you are unable to adjust the corner convergence properly,
correct them with the use of permalloy assemblies.
3-3. WHITE BALANCE
G2 Setting
1.
Switch the TV set into AV mode [apply a cross-hatch signal].
2.
Enter into the ‘Service mode’ and select ‘Picture Control’.
3.
Enter ‘Picture Control’ and select ‘Personal’ press OK.
4.
Return to ‘Picture Control’ menu and select ‘Reset’.
5.
Measure the voltages on the 3 cathodes of the CRT, Kr,Kg
and Kb using an oscilloscope with a 100:1 probe.
6.
Connect the oscilloscope to the CRT cathode which recorded
the highest voltage and adjust [RV702 SCREEN] to obtain a
reading of 175V.
White balance adjustment
1.
Input an all white signal from the pattern generator.
2.
Enter into the Service Mode.
3.
Enter into the ‘Picture Adjustment’ service menu.
4.
Select ‘Sub contrast’ and adjust to 7.
5.
Select the ‘Green drive’ and adjust so that the white balance
becomes optimum.
6.
Select the ‘Blue drive’ and adjust so that the white balance
becomes optimum.
7.
Press the ‘TV’ button on the remote commander to return to
TV operation.
3-4. FOCUS
1.
Receive a television broadcast signal.
2.
Normalise the picture setting.
3.
Adjust the focus control on the flyback transformer for the
best focus at the centre of the screen.
Bring only the centre area of the screen into focus, the magenta
ring appears on the screen. In this case, adjust the focus to
optimize the screen uniformly.
PICTURE ADJUSTMENT
AFC mode
1
REF position
2
SCP BGR
1
SCP BGF
1
Trap fo
0
Sub contrast
Adj
Sub colour
Adj
Sub brightness
Adj
Sub hue
Adj
Green drive
Adj
Blue drive
Adj
Green cutoff
Adj
Blue cutoff
Adj
Gamma
0
Pre / overshoot
0
Y delay
3
