Focus Adjustment; Screen (G2), White Balance - Sony Trinitron KV-29XL70E Service Manual

Layout of each control
Note : If you are unable to adjust the corner convergence properly,
this can be corrected with the use of permalloy magnets.
a
a-d: screen-corner
convergence defect
c
Install the permalloy assembly
for the area that needs correcting.
b
Permalloy Assy
X-4387-214-1
d
Convergence adjustment with permalloy
1.
2.
Purity magnet
3.
BMC (Hexaploe) magnet
V STAT convergence magnet
Y-splitting axis correction magnet
b
d
1.
2.
3.
4.
a
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Set the 'R-Cutoff' to 29.
11. Adjust the 'G-Cutoff', and the 'B-Cutoff' with the left and
c
12. Press the 'OK' button to write the data for each item.
- 20 -

3-3. Focus Adjustment

Receive a television broadcast signal.
Normalize the picture setting.
Adjust the focus control located on the flyback transformer to
obtain 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.
Focus
Screen

3-4. Screen (G2), White Balance

[Adjustment in the service mode using the remote
commander]
G2 adjustment
Input a dot signal from the pattern generator.
Set the Picture, Brightness and Colour to minimum.
Apply 165V DC from an external power supply to the R, G
and B cathodes of the CRT.
Whilst watching the picture, adjust the G2 control [SCREEN]
located on the flyback transformer to the point just before the
flyback return lines disappear.
White balance adjustment for TV mode
Input an all-white signal from the pattern generator.
Set the TV set or operation in Service Mode.
[ See Page 21 ].
Select 'Service' from the on screen menu display and press
'Right Arrow'.
The 'Service' menu will appear on the screen.[See Page 22]
Set the 'Contrast' to MAX.
Set the 'R-Drive' to 50.
Adjust the 'G-Drive' and the 'B-Drive' so that the white
balance becomes optimum.
Press the 'OK' button to write the data for each item.
Set the 'Contrast' to MIN.
right buttons on the remote commander so that the white
balance becomes optimum.