KV-28WF3A - Sony TV Service Manual (repair manual). Page 20

21

Purity control corrects
this area

Disk magnets or
rotatable disk
magnets correct
these areas (a-d)

Deflection yoke positioning
corrects these areas

V.STAT

  Vertical Static Magnet

H.STAT

convergence

control

C Board

RV702 (H STAT)
H STAT Convergence

RV701
Screen (G2)

(Open)

(Close)

B

G

R

B

G

R

B

G

R

1.

Input a dot signal from the pattern generator. 
Normalize the picture setting.

2.

[Moving horizontally], adjust the H.STAT control so that the 
horizontal red, green and blue dots coincide at the centre of the 
screen.

3.

[Moving vertically], adjust the V.STAT magnet so that the
vertical red, green and blue dots coincide at the centre of the 
screen.

•

If the horizontal dots are unable to coincide with the variable 
range of the H.STAT convergence, adjust together with the 
V.STAT convergence while tracking.
[Adjust the convergence by tilting the V.STAT convergence or 
by opening and closing the V.STAT convergence.]

4.

Movement of the red, green and blue dots by tilting the
V.STAT magnet and by opening or closing the V.STAT
magnet.

a).

By opening or closing the V.STAT magnet, the red, green and 
blue dots move as indicated below.

b).

By rotating the V.STAT magnet counter clockwise, the red, 
green and blue dots move as indicated below.

GREEN

BLUE

RED