Focus; Screen (G2) - Sony KV-25FS12 Manual De Servicio

DYNAMIC CONVERGENCE ADJUSTMENT
Before performing this adjustment, perform Horizontal and Vertical Static
Convergence Adjustment.
1. Slightly loosen defl ection yoke screw.
2. Remove defl ection yoke spacers.
3. Move the defl ection yoke for best convergence as
shown below:
R G B B G R
4. Tighten the defl ection yoke screw.
5. Install the defl ection yoke spacers.
TLH PLATE ADJUSTMENT
1. Input crosshatch pattern.
2. Adjust PICTURE QUALITY to standard, PICTURE and BRIGHTNESS
to 50%, and OTHER to standard.
3 Adjust the Horizontal Convergence of red and blue dots by tilting the
TLH plate on the defl ection yoke.
RV701
TLH Plate
V.STAT
CB Board
VB
Board
B R R B
(R)(B) (B)(R)
B G R
R B
G G
R
B R G B
B G R R G B
R G B
R
B
G
G
R B
B G
R
YCH
(TLV)
TLV
XCV
TLH+
TLH-
4. Adjust XCV core to balance X axis.
5. Adjust YCH VR to balance Y axis.
6. Adjust vertical red and blue convergence with V.TILT (TLV VR.)
Note: Perform adjustment 3-6 while tracking items 1 and 2.
SCREEN-CORNER CONVERGENCE
1. Affi x a permalloy assembly corresponding to the misconverged areas:
b

2-3. FOCUS

1. Adjust FOCUS control for best pictures.
Focus (FV)

Screen (G2)

2-4. SCREEN (G2)
1. Input a dot pattern.
2. Set the PICTURE and BRIGHTNESS controls at minimum and
COLOR control at normal.
3. Adjust SBRT, GCUT, BCUT in service mode with an oscilloscope as
shown below so that voltages on the red, green, and blue cathodes
are 170 ± 2VDC.
GND
— 12 —
KV-25FS12 / 25FS12C
a
a
a-d: screen-corner
misconvergence
c
d
c
170 ± 2.0 VDC
pedestal
b
d