Sony KP 48S75 - Manual (Page 37)

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KP-43T75/48S75/
53N77/53S75/61S75
RM-Y906
3-7. 4-POLE MAGNET ADJUSTMENT
1. Receive the Dot signal.
2. Set in service mode.
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 block to the left and set
to underfocus to enlarge the spot.
5. Now align the 4-Pole Magnet so that the enlarged spot
becomes a perfect circle for green and red.
6. Perform the same alignment for blue.
3-8. DEFOCUS ADJUSTMENT (BLUE)
Note: Please adjust the blue dot to be slightly larger than red and
green dots. This adjustment provides a more pleasing picture
to the customer.
1. Select the video menu and set the mode to “VIVID” mode.
2. Set to the service mode.
3. Change TV mode to the video input mode.
4. Set to PJE, and press 6 to display the test signal (dots) on the
screen.
5. Turn the blue focus VR on the focus block to adjust to the
diameter of the dots as shown in the figure below.
3-6. 2-POLE MAGNET ADJUSTMENT
(GREEN,RED)
1. Receive the Dot signal.
2. Set in service mode.
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 block to the right and
set to overfocus to enlarge the spot.
5. Now align the 2-Pole Magnet so that the enlarged spot is in
the center of the Just Focus spot.
6. Align the green focus VR and set for just (precise) focus.
7. Perform the same alignment for red.
Use the center dot
Fig. 3-7
Fig. 3-8
[Focus adjustment point]
/
x
y
x : y = 1:1.5 (BIue)
x : y = 1:1 (Green, Red)
Use the center dot
Lmm Max
Inch
L
48"
7
43"
6
53"
8
61"
9
Fig. 3-9
3-5. FOCUS VR ADJUSTMENT
1. Set to the service mode.
2. Receive the all-white signal.
3. Cover the both red and blue picture lenses with the lens caps
to show only the green color.
4. Set to PJE, and press 6 to display the test signal (crosshatch)
on the screen.
5. Turn the green focus VR on the focus block to adjust to the
optimum focus point with the test signal.
6. Cover the both green and blue picture lenses with the lens caps
to show only the red color.
7. Set to PJE, and press 6 to display the test signal (crosshatch)
on the screen.
8. Turn the red focus VR on the focus block to adjust to the
optimum focus point with the test signal.
9. Cover the both green and red picture lenses with the lens caps
to show only the blue color.
10. Set to PJE, and press 6 to display the test signal (crosshatch)
on the screen.
11. Turn the blue focus VR on the focus block to adjust to the
optimum focus point with the test signal.
12. After adjusting the items 3-4. Focus Lens Adjustment, 3-6. 2-
Pole Magnet Adjustment and 3-7. 4-Pole Magnet Adjustment,
adjust again to the optimum focus point.
Note: Instead of items 3, 6 and 9, you can cut off the unnecessary
color beams by controlling the service mode VPNT 28 RON,
29 GON, and 30 BON.
Fig. 3-6 Fig. 3-5
A
B Lens
Minimize both A and B.
Center of crosshatch
Scanning line visible.