Sony VPH-G70Q, Installation Manual

Page: 71 / 362

Adjustments
71
(EN)
Adjustments
7
Adjusting the blue lens focus
1
Reset the centering adjustment data of the blue signal.
For details, see “Resetting the data” on page 107 (EN).
2
Press the PATTERN key until the H-pattern is displayed.
3
Press the CUT OFF G and R keys to display the blue signal only.
4
Loosen the B1 screw, slide it so that the letters H at the center of the
screen are in focus, then tighten the screw.
For details, see “Adjusting the green lens focus” on page 64 (EN).
5
Loosen the B2 screw, slide it so that the letters H at all four corners of
the screen are in focus, then tighten the screw.
Repeat steps
4 and 5 until the blue focus adjustment is completed.
Proceed to adjust flapping of the blue lens.
8
Adjusting flapping of the blue lens
After adjusting the blue lens focus, adjust flapping of the blue lens (angle
of the blue CRT).
Check the tilt of the focal surfaces at the upper, lower, left and right parts
of the screen, then adjust the focus with the H and V screws on the blue
CRT.
For details, see “Adjusting flapping of the green lens” on page 66 (EN).
Proceed to adjust the blue magnetic focus, AQP and DQP.
9
Adjusting the blue magnetic focus, AQP and DQP
After adjusting flapping of the blue lens, cover the blue lens with the cap
for magnetic focus adjustment. Then adjust the magnetic focus, AQP and
DQP.
To adjust them, perform the same procedure as for the green magnetic
focus, AQP and DQP.
For details, see “Adjusting the green magnetic focus and AQP/DQP”on pages 68
(EN) and 69 (EN).
If the blue signal is completely in focus, remove the cap for
magnetic focus adjustment from the blue lens and proceed to
adjust the uniformity of all white mode screen.
Note
When the blue magnetic focus adjustment mode is canceled, the blue signal is
slightly defocused. This is because the offset function activates so that the
optimum picture is projected.
For details on defocused level, see “Fine magnetic focus and AQP/DQP
adjustments” on page 96 (EN).