Sony KDP-57XBR2 Service Manual page 208

6. Cover the green and blue picture lenses
with lens caps to allow only red to show
(or use the method shown in the note
below for turning off the CRTs
individually without using lens caps).
7. Adjust the red focus control on the focus
block to achieve the optimum focus
point with the dot pattern being
displayed.
8. Cover the green and red picture lenses
with lens caps to allow only blue to show
(or use the method shown in the note
below for turning off the CRTs
individually without using lens caps).
9. Adjust the blue focus control on the
focus block to achieve the optimum
focus point with the dot pattern being
displayed.
10. Repeat steps 1 through 9 after adjusting
items 1-3. "Focus Lens Adjustment", 1-5
"2-pole Magnet Adjustment", 1-6 " 4-
Pole Magnet Adjustment"
Note: If lens caps are unavailable, you can cut
off the unnecessary colors in the service mode by
individually changing the data in adjustment
category "2150P-2" , item # 1"RGBS". To display
blue only, change the data to "1", to display
green only, change the data to "2", to display red
only, change the data to "4". All colors are
displayed when the data is set to "7".
1-5 2-POLE MAGNET AND
CENTERING MAGNET
ADJUSTMENT
1. Enter the service mode.
2. Select display mode to WIDE ZOOM
and picture mode PRO, and while in the
adjustment menu press RESET on the
remote to restore the PRO mode factory
defaults. Then set the picture to
maximum, brightness to 50%, VM
(velocity modulation) off.
3. Display a dot pattern.
4. Cover the red and blue CRT lenses with
lens caps to allow only green to show
(or use the method shown in the note
below for turning off the CRTs
individually without using lens caps).
5. Turn the green focus control on the
focus block all the way counter-
clockwise and set it to underfocus to
enlarge the spot (the dot).
Dot in center of the screen.
Before under-focus.
Note the small bright spot within the
under-focused dot.
6. Adjust the green CRT's 2-pole magnet
so that the small bright spot is in the
center of the large defocused spot.
CRT Assembly
7. Adjust the green focus control on the
focus block and set it for the best focus.
5
After under-focus.
Centering
magnet.
4-Pole
magnet.
2-Pole
magnet.