JVC AV-34LS Service Manual page 35

STATIC CONVERGENCE ADJUSTMENT
1. Input a crosshatch signal.
2. Using 4-pole convergence magnets, overlap the red and blue lines in
the centre of the screen (Fig. 4) and turn them to magenta (red/blue).
3. Using 6-pole convergence magnets, overlap the magenta(red/blue)
and green lines in the centre of the screen and turn them to white.
4. Repeat 2 and 3 above, and make best convergence.
DYNAMIC CONVERGENCE ADJUSTMENT
1. Using the Y VR on the deflection yoke, match the Y
H
5 and 8)
2. Using the Y VR on the deflection yoke, match the Y
V
3. Repeat the steps 1 and 2, obtain an optimum convergence.
4. Differential coil ADJUSTMENT.
In case where the horizontal lines of red and blue around the centre
of both sides of the picture as shown in Fig. 7, adjust the X
ence by using the differential coil on the top of the deflection yoke
(Fig. 8) so as to minimize the X
•
After adjustment, fix the wedge at the original position.
Fasten the retainer screw of the deflection yoke.
Fix the 6 magnets with glue.
Y
V
FRONT
X coil
V
(CROSS). (Fig.
H
. (Fig. 6 and 8)
V
V
difference.
V
VR Y VR
H
Fig. 8
No. 51854
(FRONT VIEW)
(FRONT VIEW)
RED
BLUE
GREEN
RED
differ-
BLUE
(FRONT VIEW)
GREEN
RED
BLUE
(FRONT VIEW)
Xv
AV-34LS AV-34LX
AV-34LH AV-3408TEE
Fig. 4
YH
GREEN BLUE
RED
GREEN
BLUE
RED
GREEN
YH
Fig. 5
GREEN
YV
RED
BLUE
RED
GREEN
BLUE
BLUE
GREEN
RED
YV
Fig. 6
GREEN
Fig. 7
35