13
KV-21FS105
KV-21FS105
Dynamic Convergence Adjustment
Before performing this adjustment, perform Horizontal and Vertical Static
Convergence Adjustments.
Preparation:
1. Slightly loosen defl ection yoke screw.
2. Remove defl ection yoke spacers.
3. Move the defl ection yoke for best convergence as shown:
R G B
B G R
R
G
B
R
G
B
B G R R G B
R G B
R
R
R
G
B
G
B
G
B
R G B
B G R
4 Tighten the defl ection yoke screw.
5. Install the defl ection yoke spacers.
TLH Plate Adjustment
Preparation:
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.
TLH+
TLH-
B R
(R)(B)
R B
(B)(R)
4. Adjust XCV core to balance X axis.
5. Adjust YCH VR to balance Y axis.
Screen-Corner Convergence
1. Affi x a permalloy assembly corresponding to the misconverged areas.
b
a
c
d
a
b
a-d: screen-corner
misconvergence
c
d
2-3. FOCUS
1. Adjust FOCUS control for best picture.
Focus (FV)
Screen (G2)
2-4. SCREEN (G2)
1. Input dot pattern from the pattern generator.
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 VDC.
pedestal
GND
170Vdc
170 + 4.0 Vdc
4. Observe the screen and adjust SCREEN (G2) VR in FBT to obtain the
faintly visible background of dot signal.
