– 3 –
Fig. 4-1
8Turn the Deflection Coil until the raster becomes straight
on the monitor screen.
8Tighten the Deflection Coil Holding Screw carefully.
Note: When fixing the Deflection Coil Holding Screw, push
the Deflection Coil to connect to CRT tightly.
(4). Centering and Horizontal Size Adjustment
Adjust: VR301 (CONTRAST) Main Board
VR302 (BRIGHT) Main Board
Centering Magnets
L501 (H.SIZE) Main Board
Observe: Video Monitor Screen
8Supply the Monoscope Pattern signal to the Video Input
Connector.
8Fix VR301 and VR302 at their center positions.
8Adjust the Centering Magnets as shown in Fig. 4-1 until
the Monoscope Pattern signal comes to the center on the
monitor screen.
8Adjust L501 so that the full Horizontal Width becomes plus
6% overscanning.
8Repeat adjusting the Centering Magnets and L501 until
satisfactory.
(5). Vertical Height and Vertical Linearity Adjustment
Adjust: VR408 (V.SIZE) Main Board
VR412 (V.LINE) Main Board
Centering Magnets
Observe: Video Monitor Screen
8Supply the Monoscope Pattern signal to the Video Input
Connector.
8Fix VR301 and VR302 at their mechanical center positions.
8Adjust VR408 so that the full Vertical Height becomes plus
6% overscanning.
8Adjust VR412 so that the circle portion of the Monoscope
Pattern signal becomes nearly a true circle.
8Adjust the Centering Magnets so that the full Horizontal
Width and full Vertical Height become the same
overscanning rate.
8Repeat adjusting VR408, VR412 and the Centering
Magnets until satisfactory.
(6). Focus Adjustment
Adjust: VR601 (FOCUS) CRT Board
Observe: Video Monitor Screen
8Supply the Monoscope Pattern signal to the Video Input
Connector.
8Adjust the VR601 for the best focus in the monitor screen.
(7). Raster Distortion Adjustment
Adjust: Deflection Magnets
Observe: Video Monitor Screen
8Supply the Crosshatch signal to the Video Input Connector.
8Adjust 8 magnets as shown in Fig. 4-2 so that the raster
distortion becomes minimum.
Fig. 4-2
8The raster distortion against 8 magnets are as shown in
Fig. 4-3.
Fig. 4-3
