JVC AV-21L31/ME, Руководство по обслуживанию

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32 No. 51908
AV-21L31
AV-25L31
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. 7) 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.
DYNAMIC CONVERGENCE ADJUSTMENT
1. Move the deflection yoke up and down to adjust the pin cushion dis-
tortion in the screen top and bottom. (Fig. 8)
2. Move the deflection yoke left to right to overlap the lines in the pe-
riphery, and match the Yv. (Fig. 9)
3. Using the VR on the deflection yoke, match the Y
H
(CROSS). (Fig. 10
and 12)
4. Repeat the steps 1 and 3 and obtain an optimum convergence.
5. 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. 11, adjust the X
V
differ-
ence by using the differential coil on the top of the deflection yoke
(Fig. 12) so as to minimize the X
V
difference.
•
After adjustment, fix the wedge at the original position.
Fasten the retainer screw of the deflection yoke.
Fix the P/C magnets with glue.
RED
RED
GREEN
RED
RED
BLUE
(FRONT VIEW)
(FRONT VIEW)
(FRONT VIEW)
BLUE
BLUE
BLUE
GREEN
GREEN GREEN
Xv
GREEN
(FRONT VIEW)
(FRONT VIEW)
GREEN GREEN
GREEN
GREEN
RED
RED
RED
RED
BLUE
BLUE
BLUE
BLUE
Fig. 7
Fig. 10
Fig. 9
Fig. 11
Fig. 8
TOP
BOTTOM
YH
YV
YV
YH
Fig. 12
X
V
coil
VR
FRONT
CONVERGENCE ADJUSTMENTS [AV-25L31
/ME
]