akira PTV-50H08, Service Manual

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Green
Geometry center of the screen
Red
Blue
L
Fig.1 Fig.2 L1
L
Green Red or Blue
L2
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12
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Model No.: PTV-50H08
Version: 1.0
Adjustment Procedure:
1 Cover the red and the blue projection tubes with the lens covers of the projection tubes to remain
only the green raster on the screen.
2 Adjust the deflecting coil of the green projection tube to let the raster inclination degree on the
screen as shown in Fig. (1: L ≤ ± 2mm).
3 Remove the lens cover of the red projection tube or the blue one to make the screen to display both
the red and the green raster or the blue and the green raster.
4 Adjust the deflecting coils of the red and the blue projection tubes on the TV set to make the red and
the blue raster inclination degrees as shown in Fig 2.: (L1, L2
≤ ±
2mm).
5 After the adjustment, fix the deflecting coils of red, green and blue projection tubes with a screw
driver. The torque exerted is 1.18N. m.
Rough adjustment of the raster position
At first, adjust and fix the position of green raster and make it as a bench. Revolve respectively the central
adjustment magnetic sheets of the red and the blue projection tubes. Move the center of the red square or
the blue one to make the center of the red raster or the blue one as shown in the following
figure.
L1
L2