JVC AV-28WFR1EK/A, Service Manual

Page: 36 / 65

No.51754
AV-29RF6
32
STATIC CONVERGENCE ADJUSTMENT
1. Input a crosshatch signal.
2. Using 4-pole convergence magnets, overlap the red and blue
lines in the center of the screen (Fig.1) and turn them to
magenta (red/blue).
3. Using 6-pole convergence magnets, overlap the magenta
(red/blue) and green lines in the center of the screen and turn
them to white.
4. Repeat 2 and 3 above, and make best convergence.
●
After adjustment, fix the wedge at the original position.
Fasten the retainer screw of the deflection yoke.
Fix the 6 magnets with glue.
DYNAMIC (periphery) CONVERGENCE
ADJUSTMENT
After adjusting purity & static convergence.
1. Move the deflection yoke up and down to adjust the pin cushion
distortion in the screen top and bottom. (See Fig. 2)
2. Move the deflection yoke left to right to overlap the lines in the
periphery, and match the Yv.(See Fig. 4)
3. Using the VR1 on the deflection yoke, match the Y
H
(CROSS).
(See Fig. 3 and 6)
4. Using the VR2 on the deflection yoke, match the Y
H
(BOW).
(See Fig. 3 and 6)
5. Repeat the steps 1 and 4 and obtain an optimum convergence.
6. Differential coil ADJUSTMENT.
In case where the horizontal lines of red and blue around the
center of both sides of the picture as shown in Fig. 5, adjust the
X
V
difference by using the differential coil on the top of the
deflection yoke (Fig. 6) so as to minimize the X
V
difference.
(FRONT VIEW)
Fig. 1
X
V coil
VR2 VR1
Fig. 6
FRONT
(FRONT VIEW)
TOP
BOTTOM
Fig. 2
(FRONT VIEW)
RED
GREEN
YH
BLUE
BLUE
GREEN
RED
RED
GREEN
BLUE
YH
RED
GREEN
BLUE
Fig. 3
(FRONT VIEW)
RED
GREEN
BLUE
RED
GREEN
BLUE
RED
GREEN
BLUE
BLUE
GREEN
RED
YV
YV
Fig. 4
(FRONT VIEW)
GREEN
BLUE(RED)
RED(BLUE)
X
v
Fig. 5
フラット管（ LG 用）