Convergence - Sony TRINITRON KV-20FS12 Service Manual

KV-20FS12/20FV12/21FE12/A/C/21FM12/21FV12/C

3-2. CONVERGENCE

Before starting convergence adjustments:
1. Perform FOCUS, V.LIN AND V.SIZE adjustments.
2. Set BRIGHTNESS control to minimum.
3. Feed in dot pattern.
Vertical Static Convergence
1. Adjust V.STAT magnet to converge red, green and blue dots in
the center of the screen (Vertical movement adjust V.STAT RV
to converge).
Center dot
RV701
R G B
V.STAT
2. Tilt the V.STAT magnet and adjust static convergence to open
or close the V.STAT magnet.
When the V.STAT magnet is moved in the direction of arrows a
and b, red, green, and blue dots move as shown below:
(1)
a
b
b
(2)
a
b
(3)
a
b
b
R
G
B
V.STAT magnet
a b
B B
G
G
R
R
R G B
B G R
B
R
G
G
R
B
Horizontal Static Convergence
If the blue dot does not converge with the red and green dots,
perform the following:
1. Move BMC magnet (a) to correct insufficient H. Static
convergence.
2. Rotate BMC magnet (b) to correct insufficient V. Static
convergence.
3. After adjusting the BMC magnet, repeat Beam Landing
Adjustment.
PURITY
Dynamic Convergence Adjustment
Before performing this adjustment, perform Horizontal
and Vertical Static Convergence Adjustment.
1. Slightly loosen deflection yoke screw.
2. Remove deflection yoke spacers.
3. Move the deflection yoke for best convergence
as shown on the following page.
— 16 —
V-STAT
b
BMC magnet