SECTION 3 SET-UP ADJUSTMENTS
The following adjustments should be made when a complete realignment is required or when a new picture tube is installed. These adjustments should be performed with rated power supply voltage unless otherwise noted. Set the controls as follows unless otherwise noted. VIDEO MODE: STANDARD PICTURE control: ................ Normal BRIGHTNESS control ......... Normal Perform the adjustments in order as follows: 1. Beam Landing 2. Convergence 3. Focus 4. Screen (G2) 5. White Balance Note: Test equipment required: � � � � Color bar pattern generator Degausser DC power supply Digital multimeter
3-1. BEAM LANDING
Before beginning adjustment procedure: 1. Degauss the entire screen. 2. Feed in the white pattern signal.
5. Move the deflection yoke forward and adjust so that the entire screen becomes green.
Adjustment Procedure
1. Input a raster signal with the pattern generator. 2. Loosen the deflection yoke mounting screw and set the purity control to the center as shown below.
Purity Control
6. Switch over the raster signal to red and blue and confirm the condition. 7. When the position of the deflection yoke is determined, tighten it with the deflection yoke mounting screw. 8. If landing at the corner is not right, adjust by using the disk magnets.
3. Turn the raster signal of the pattern generator to green. 4. Move the deflection yoke backward and adjust the purity control so that green is in the center and red and blue are at the sides evenly.
Purity control corrects this area
a c
b d
Disk magnets or rotatable disk magnets correct these areas (a-d)
