Sony VPH-G70Q Manuel D'installation page 72

Adjusting the Focus
0 Adjusting the uniformity of all-white mode screen
72
(EN) Adjustments
After completing the green, red and blue focus adjustments, check the
uniformity of all-white mode screen.
1
Press the MG FOCUS, B ADJ and MG FOCUS keys to enter the
defocused mode.
DEFOCUS is displayed on the screen and the blue signal is slightly
defocused.
For details on defocused level, see "Fine magnetic focus and AQP/DQP
adjustments" on page 96 (EN).
2
Press the PATTERN key until the all-white screen appears.
3
If the all-white screen does not seem uniform, adjust the blue magnetic
focus at the corners again so that the screen becomes uniform white.
Proceed to adjust the registration if the uniformity of the all-
white mode screen is adjusted completely.