Focus Adjustment; Screen (G2), White Balance - Sony KV-28EW20B Service Manual

Layout of each control
V.STAT

3-3. Focus Adjustment

1. Receive a television broadcast signal.
2. Normalize the picture setting.
3. 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.
Purity
BMC (Hexapole)
Focus
Screen

3-4. Screen (G2), White Balance

[Adjustment in the service mode using the remote
commander]
G2 adjustment
1. Input a dot signal from the pattern generator.
2. Enter the 'Service Mode' by pressing 'TEST', 'TEST' and
'38' (TT-38) on the remote commander, to set up the G2
service adjustment mode.
3. Whilst watching the picture, adjust the G2 control [SCREEN]
located on the Flyback Transformer to the point where the
OSD menu indication shows "OK".
White balance adjustment for TV mode
1. Input an all-white signal from the pattern generator.
2. Enter into the 'Service Mode' by pressing 'TEST', 'TEST'
and 'MENU' on the Service Commander.
3. Select 'Service' from the on screen menu display and press
the right arrow button on the remote commander.
4. The 'Service' menu will appear on the screen.
[See Page 21]
5. Set the 'Contrast' to MAX.
6. Set the 'R-Drive' to 25.
7. Adjust the 'G-Drive' and the 'B-Drive' so that the white
balance becomes optimum.
8. Press the 'OK' button to write the data for each item.
9. Set the 'Contrast' to MIN.
10. Adjust the 'G-Cutoff', and the 'R-Cutoff' with the left and
right buttons on the remote commander so that the white
balance becomes optimum.
11. Press the 'OK' button to write the data for each item.
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