ViewSonic PJ452 Service Manual - Page 9

4-2 Convergence adjustment Signal pattern for internal adjustment Adjustment procedure 4-3 E-POS adjustment(vertical bars adjustment) Signal pattern for internal adjustment 112/255 4-4 Ghost adjustment Signals for internal adjustment 30% 30% 0/255 112/255 1. Open FACTORY MENU and then select OPTION > CNV-V. Use R and/or B so that three colors of images can be converged at center, top and bottom of the screen. 2. In the same way, select OPTION > CNV-H and use R and/or B so that three colors of images can be converged at center, left and right of the screen. Adjustment procedure 1. Make this adjustment after completing the adjustment 4-2 Convergence adjustment. 2. Choose Advance menu > OPTION > SERVICE > GHOST > R,G and B, and set them to zero. 3. Open FACTORY MENU. Select DAC-P > E-POS > R and use it so that vertical bars can disappear. 4. In the same way, select DAC-P > E-POS > G and use it so that vertical bars can disappear. 5. In the same way, select DAC-P > E-POS > B and use it so that vertical bars disappear. Adjustment procedure 1. Make this adjustment after completing the adjustment in 4-3. 2. Choose Advance menu > OPTION > SERVICE > GHOST > R,G and B, and set them to zero. 3. Use DAC-P - GHOST - R: in the FACTORY MENU to adjust so that R color ghost is at a minimum. (Set the adjustment value to default, and then raise the value. When a ghost appears to the left of a vertical line, reduce the value by 4 steps.) 4. In the same way, use DAC-P - GHOST-G: in the FACTORY MENU to adjust so that G color ghost is at a minimum. 5. In the same way, use DAC-P - GHOST-B: in the FACTORY MENU to adjust so that B color ghost is at a minimum. ViewSonic Corporation Confidential - Do Not Copy PJ452 6