Focus Lens Adjustment; Pole Magnet Adjustment - Sony KDP-57XBR2 Service Manual

3-4. FOCUS LENS ADJUSTMENT

In this adjustment, use the remote commander in the service mode.
For details of the usage of the service mode and the remote commander,
please refer the item 3-10. ELECTRICAL ADJUSTMENT BY
REMOTE COMMANDER.
1. Loosen the lens screw.
2. Cover the both red and blue picture lenses with the lens caps
to show only the green color.
3. Turn the green lens to adjust to the optimum focus point with
the crosshatch signal.
4. Tighten the lens screw.
5. Cover the both green and blue picture lenses with the lens
caps to show only the red color.
6. Adjust red CRT lens just the same as green.
7. Cover the both green and red picture lenses with the lens
caps to show only the blue color.
8. Adjust blue CRT lens just the same as green.
9. After adjusting the items 3-5. FOCUS VR ADJUSTMENT,
3-6. 2-POLE MAGNET ADJUSTMENT, 3-7. CENTER
MAGNET ADJUSTMENT and 3-8. 4-POLE MAGNET
ADJUSTMENT, adjust again to the optimum focus point.
Note: Instead of items 2, 5 and 7, you can cut off the unneces-
sary color beams by controlling the service mode "1
RGBS" of "2150P-2".
*: Every time you press 6, the test signal changes to
"crosshatch+video signal" -
"crossbatch+borderline(black)" - "crosshach(black)" -
"dots(black)" - off.
Test signal
Fig. 3-4
3-5. FOCUS VR ADJUSTMENT
1. Set generator to crosshatch.
2. Cover the both red and blue picture lenses with the lens caps
to show only the green color.
3. Turn the green focus VR on the focus pack to adjust to the
optimum focus point with the crosshatch signal.
4. Cover the both green and blue picture lenses with the lens
caps to show only the red color.
5. Turn the red focus VR on the focus pack to adjust to the
optimum focus point with the crosshatch signal.
6. Cover the both green and red picture lenses with the lens
caps to show only the blue color.
7. Turn the blue focus VR on the focus pack to adjust to the
optimum focus point with the crosshatch signal.
8. After adjusting the items 3-4. FOCUS LENS ADJUSTMENT,
3-6. 2-POLE MAGNET ADJUSTMENT, 3-7. CENTER
MAGNET ADJUSTMENT and 3-8. 4-POLE MAGNET
ADJUSTMENT, adjust again to the optimum focus point.
Note: Instead of items 2, 4 and 6, you can cut off the unneces-
sary color beams by controlling the service mode "1
RGBS" of "2150P-2".
Lens
Fig. 3-5

3-6. 2-POLE MAGNET ADJUSTMENT

1. Set the picture mode to"Pro" and picture to MAX.
2. Receive the dot signal.
3. Cover the both red and blue picture lenses with the lens caps
to show only the green color.
4. Turn the green focus VR on the focus pack to the left and set
to overfocus to enlarge the spot.
5. Adjust 2-pole magnet so that the bright spot should be
centered.
6. Align the green focus VR and set for just (precise) focus.
7. Perform the same alignment for red and blue.
Note: Instead of item 2 you can cut off the unnecessary color
beams by controlling the service mode "1 RGBS" of
"2150P-2".
Use the center dot
– 19 –
KDP-57XBR2/65XBR2
K
A
Minimize both A and B.
B
Fig. 3-6
Fig. 3-7
RM-Y185