http://schema99.host.sk/Fig. 13. Slowly turn the screen control clockwise until a green colour horizontal line appears on thepicture tube. This is the setting point for the screen control.Note:Do not adjust the G-CUTOFF setting in the following procedure.4. Adjust the remaining R and B-CUTOFF controls so as to get a white horizontal line on thescreen.5. Return to full field SCAN by pushing the position 5 key on the remote control.6. Adjust the R-Drive and B-Drive controls as to obtain a uniform white on the white bar of thegreyscale pattern.7. Confirm correct B/W rendition and greyscale tracking or repeat CUTOFF and drive controlsetup.Note:Write down the original value for each address adjustment before adjusting anything.Fig. 28. Wedge A shown in Fig. 2 should be fixed within a range of 45° to the left of the vertical lineas shown.9. After inserting wedge A, insert wedges B, C and D.The wedges should be set 90° apart from each other.10. Be certain that the four wedges are firmly fixed and the Deflection Yoke is tightly clamped inplace otherwise the Deflection Yoke may shift its position and cause a loss of convergence and