2-Pole Magnet Adjustment; Defocus Adjustment; Green, Red And Blue Focus Adjustment; Green, Red, And Blue Lens Focus - Sony KP-FS57M31 Service Manual

3-5. 2-POLE MAGNET ADJUSTMENT

1. Receive the Dot signal.
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Turn the green focus VR on the focus pack to the left and set
to under focus to enlarge the spot.
4. Adjust the 2-Pole Magnet so that the bright spot should be
centered.
(center of the dot doesn't move)
5. Align the green focus VR and set for just (precise) focus.
6. Select Dynamic mode, turn BLUE FOCUS VR on the focus
pack to the left.
7. Confirm that right- end and left-end dot core are in center of
dot.
8. If cores are not in center, adjust blue 2 pole magnet as cores
are in center.
Use the center dot
Fig. 3-7
Left-end dot
(BLUE)
NG
OK
Fig. 3-8
3-6. CENTERRING MAGNET ADJUSTMENT
1. Receive the SPCB signal.
2. Cover the both red and blue picture lenses with the lens caps
to show only the color.
3. Adjust the green centering magnet to put the center of the
SPCB signal to the center of the screen.
4. Adjust red centering magnet in the same way.
5. Adjust blue centering magnet in the same way.
3-7. 4-POLE MAGNET ADJUSTMENT
1. Receive the Dot signal.
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Turn the green focus VR on the focus pack to the right and
set to over focus to enlarge the spot.
4. Now align the 4-Pole Magnet so that the enlarged spot be-
comes a perfect circle.
5. Perform the same alignment for red.
Use the center dot
Fig. 3-9
Right-end dot
(BLUE)
NG OK NG
3-8. DEFOCUS ADJUSTMENT (BLUE)
1. Receive the Dot signal.
2. Cover the both red and green picture lenses with the lens
caps to show only the color..
3. Turn the blue focus VR on the focus pack to the right to
make the round dot elipical.
4. Set 4 pole magnet tab angle 90°.
5. Rotate 4 pole magnet keeping Tab angle 90° make the spot
shape vertical ellipse.
3-9. GREEN, RED AND BLUE FOCUS
ADJUSTMENT
3-9-1. Green, Red and Blue Lens Focus Adjustment
1. Receive the Monoscope signal.
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Rotate the green lens and adjust to obtain the best lens focus
at the center area.
4. Fix lens screw.
5. Repeat above process for red and blue.
6. Rotate the blue lens and adjust to obtain the best lens focus at
the both side area.
7. Fix blue lens screw.
3-9-2. Green and Red Dot/Hatch Electrical Focus
Adjustment
1. Receive the signal.
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Rotate the green focus VR on the focus pack and adjust to
obtain the best electrical focus in the adjust point.
4. Repeat above process for red and blue.
Adjust Point of Green and Red
– 17 –
KP-FS57M31/M61/M90/M91
Rotate
90° Fix
OK
Fig. 3-10
Adjust Point of Blue
Fig. 3-11
Fig. 3-12
RM-997