White Balance; Tv Operation - Sony KV-28WF1A Service Manual

(3) Screen corner convergence.
If you are unable to adjust the corner convergence properly,
correct them with the use of permalloy assemblies.
a
a-d:
a—d: angoli dello
screen-corner
schermo non in
convergenza.
convergence defect
c
Install the permalloy assembly
for the section with fault
b
Permalloy
d

3-3. WHITE BALANCE

1. Switch the set into AV mode (apply no signal to the AV
2. Connect a Volt Meter to Test Point 1 on the A board.
3. Adjust RV01 to obtain a voltage of 3.0V ±0.3V.
b
1. Input an all white signal from the pattern generator.
2. Enter into the service mode.
d
3. Enter into Picture Adjustment service menu.
4. Select sub-contrast and adjust to 7.
5. Select the Green Drive and adjust so that the white balance
6. Select the Blue Drive and adjust so that the white balance
7. Press the TV button to return to TV operation.
a
c
— 27 —
G2 Setting
connectors).
White balance adjustment
becomes optimum.
becomes optimum.
PICTURE ADJUSTMENT
AFC mode
REF position
SCP BGR
SCP BGF
Trap Fo
Sub contrast
Sub colour
Sub brightness
Sub hue
Green drive
Blue drive
Green cutoff
Blue cutoff
Gamma
Pre / overshoot
Y delay
KV-28WF1
1
2
1
1
0
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
0
0
3