JVC AV25LS/C
Service Manual

AV-25LS AV-25LX

STATIC CONVERGENCE ADJUSTMENT
1. Input a crosshatch signal.
(FRONT VIEW)

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.
(FRONT VIEW) TOP Fig. 4

DYNAMIC CONVERGENCE ADJUSTMENT
1. Move the deflection yoke up and down to adjust the pin cushion distortion in the screen top and bottom. (Fig. 5) 2. Move the deflection yoke left to right to overlap the lines in the periphery, and match the Yv. (Fig. 6) 3. Using the VR on the deflection yoke, match the YH (CROSS). (Fig. 7 and 9) 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. 8, adjust the XV difference by using the differential coil on the top of the deflection yoke (Fig. 9) so as to minimize the XV difference.
(FRONT VIEW) RED GREEN BLUE YV BLUE GREEN RED RED GREEN BLUE BOTTOM Fig. 5

BLUE GREEN RED YV Fig. 6 (FRONT VIEW) RED YH GREEN BLUE

� After adjustment, fix the wedge at the original position.
Fasten the retainer screw of the deflection yoke. Fix the 6 magnets with glue.

BLUE

RED GREEN BLUE

VR

GREEN RED

FRONT
BLUE GREEN YH Fig. 7 RED

XV coil

Fig. 9

(FRONT VIEW)

Xv

GREEN

Fig. 8

No. 51848B

9