Centering Magnet Adjustment; 2-Pole Magnet Adjustment; Defocus Adjustment (Blue) - Sony KP-46WT520 Service Manual

2-6. CENTERING MAGNET ADJUSTMENT

1. Set the mode to PRO.
2. Receive the monoscope signal.
3. 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).
4. Adjust the green CRT's centering magnet to put the center of the
monoscope signal to the center of the screen.
5. Repeat steps 1 through 4 for the red CRT except now you will cover
the green and blue CRT 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) and you will adjust the red
centering magnet.
6. Repeat steps 1 through 4 for the blue CRT except now you will cover
the red and green CRT 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) and you will adjust the blue
centering magnet.
7. After 2-Pole and 4-Pole adjustment, entering magnet adjustment
needs to be confi rmed. If centering magnet is re-adjusted, then 2-Pole
magnet will need to be confi rmed.
Note: If lens caps are unavailable, you can cut off the unnecessary color
beams by controlling the service mode MCP-RON, GON, BON.

2-7. 2-POLE MAGNET ADJUSTMENT

1. Set the mode to PRO and picture to MAX.
2. Receive the 100IRE 1080i Dot signal.
3. 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).
4. Turn the focus VR on the focus block to the left (counter clockwise)
and set it to overfocus to enlarge the spot.
5. Adjust the CRT's 2-pole magnet so that the small bright spot is in the
center.
6. Align the focus VR on the focus block and set it for the best focus.
7. Repeat steps 1 through 6 for the red CRT covering the green and
blue CRT 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) and you will adjust the red focus control on
the focus block.
8. Repeat steps 1 through 6 for the blue CRT covering the red and green
CRT 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) and you will adjust the blue focus control on
the focus block.
Note: If lens caps are unavailable, you can cut off the unnecessary color
beams by controlling the service mode MCP-RON, GON, BON.
KP-46WT520/51WS520/57WS520
2-8. 4-POLE MAGNET ADJUSTMENT
1. Set the mode to VIVID and WIDE mode = Zoom, VM:Off.
2. Receive the 100IRE 1080i Dot signal.
3. 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).
4. Turn the (green) focus VR on the focus block to the right (clockwise)
and set it to under-focus to reduce the spot.
5. Adjust the 4-pole magnet so that the small spot in the center of the
screen becomes round for green and red.
6. Adjust the blue spot for:
a. KP-46WT520/51WS520 to a round shape X:Y=1:1
b. KP-57WS520 to an oval shape X:Y=1.2:1
7. Repeat steps 1 through 6 for the red CRT except now you will cover
the green and blue CRT 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) and you will adjust the red
focus control on the focus block.
8. Repeat steps 1 through 6 for the blue CRT except now you will cover
the red and green CRT 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) and you will adjust the blue
focus control on the focus block.
Note: If lens caps are unavailable, you can cut off the unnecessary color
beams by controlling the service mode MCP-RON, GON, BON.
Use the center dot

2-9. DEFOCUS ADJUSTMENT (BLUE)

Note: Adjust the blue dot to be slightly larger than red and green dots.
This adjustment provides a more pleasing picture to the customer.
1. Set the mode to PRO, PICTURE : Max, COLOR TEMP : Cool.
2. Receive the 100IRE 1080i Dot signal.
3. Cover the red and green CRT 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).
4. Turn the blue focus VR on the focus block to the right (clockwise) until
blue spot is in focus.
5. Change mode to VIVID to confi rm Flare level is minimal using cross
hatch signal.
6. Set the generator to an all white signal and check uniformity.
Note: If lens caps are unavailable, you can cut off the unnecessary color
beams by controlling the service mode MCP-RON, GON, BON.
Adjust Point
KP-46WT520/51WS520/57WS520
x
y
x : y = 1:1 (Green, Red)
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