KP-51HW40, KP-57HW40 (serv.man2) - Sony TV Service Manual (repair manual). Page 3

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 block 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 block 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 block 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 and 3-7. 4-Pole Magnet Adjustment,
  adjust again to the optimum focus point.
Note: Instead of items 2, 4 and 6, you can cut off the unnecessary
color beams by controlling the service mode 2150P-2 1

MAGNET ADJUSTMENT 

1.  Either select the PJED Test Pattern dot signal or apply an external 
 

dot signal

2.  Set the Picture control to Max., Brightness to 50% and the VM to 
 

OFF, in the customer users menu.

3.  Cut off the red and blue CRTs by controlling the service mode 
 

2150P-2 1 RGBS.

4.  Turn the green focus control counterclockwise so the picture is 
 

slightly defocus (just off of focus). Confi rm that the dot size 

 

increases slightly. 

5.  Adjust the the 2-pole magnet so that the left and right side fl are 
 

levels (compare the dots that are indicated in the white areas of the 

 

fi gure below) are balanced and are approximately equal. 

 

 

 

 A 

 

  B    

 

 

 

    A = B [Flare Balance]

6.  Readjust the Green focus control to best focus position. (minimum 
 

dot diameter)

7.  Apply a Monoscope signal to the set.
8.  Adjust the H-CENTERING and V-CENTERING roughly By the 
 

centering magnets. 

9.  Check 2-Pole magnet adjustment. If necessary, repeat steps 1 – 6.
10. Adjust the Red 2-pole magnet and centering magnet in the 
 

same manner. 

11. Adjust the Blue 2-pole magnet and centering magnet in the same 
 

manner

1.  Setup: Apply a Dot Hatch Signal and set the mode to Vivid Mode 
 

and verify the color temperature is set to Cool in the users menu.

 

Cut off the red and green CRT’s by controlling the service mode 

 

2150P-2 1 RGBS.

2.  Turn the Blue focus control clockwise, until the dot at the center 
 

becomes oval. (see fi gure below).

3.  Confi rm the fl are is minimal while the bright spot is located in the 
 

center. If not, please readjust the 2 and 4 pole magnets. 

4.  Check for uniformity on a 100% IRE all white fi eld.

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 block to the right and set
  the spot will become smaller.
5.  Adjust the 4-Pole Magnet so that the spot becomes round for
  green and red.
6.  Adjust blue spot to an oval shape X:Y = 1:1.2
Note: Instead of item 2 you can cut off the unnecessary color
beams by controlling the service mode 2150p-2 1 RGBS.

/

x

y

x : y = 1:1.2  (BIue)
x : y = 1:1 (Green, Red)

Use the center dot

        Not required - Combined with 2-Pole Magnet adjustment

A

B

Lens

Minimize both A and B.

Center of crosshatch

Scanning line visible.