ViewSonic PJ750 Service Manual - Page 10

Adjustment operations (reference) 86% operation 43% operation 29% operation Adjustment 00 point 0 14 29 43 86 100 Input signal (%) OI Adjustment point 0 14 29 43 86 100 Input signal (%) g, Co Adjustment point. 0 14 29 43 86100 Input signal (%) 14% operation Adjustment point a) co 0 14 29 43 86100 Input signal (%) 0% operation Adjustment point rD 14 29 43 86 100 Input signal (%) 4-6 Color uniformity adjustment Preparations 1. Perform these adjustments after the white balance adjustment described in Section 4-5. 2. Make a color uniformity adjustment for the following three tones. • MIN tone (approx. 10% input signal) • MID tone (approx. 50% input signal) • MAX tone (approx. 75% input signal) (Note that the MIN tone need not be adjusted when there is no conspicuous color shading during a black signal input.) 3. Place the cursor on the tone to be adjusted in the Adjust menu and press the [V] key. This displays the Adjust Tone menu at the bottom of the screen. Select the major adjustment lattice point No. and color, then adjust them. 4. The major adjustment lattice point numbers (a total of 17 points) corresponds to the major adjustment lattice point positions in the diagram on the right. The color uniformity of the entire screen can be adjusted by adjusting the white balance for each of the points starting in order from the low numbers. 5. Adjustment point No. 1 should not be adjusted, because it controls the brightness of the entire screen. 6. To temporarily turn correction off, place the cursor on ON in the Adjust Tone menu and press the [V] key. To turn it on again, place the cursor on OFF in the Adjust Tone menu and press the [A] key. 7. Although this adjustment can also be made using internal signals, we will here use the [MENU SELECT] key on the Remote control transmitter to select the following two signals. • Solid monochrome adjustment color (use G color adjustment when a color differential meter is used) • Solid white (use for adjustment other than above) 8. Reset color shading correction before adjustment. • When 3 tones and all colors are to be reset, place the cursor on [C. UNIF]. in the Adjust menu, press the [RESET] key and select [DEFAULT]. • When only 1 tone is to be reset, place the cursor on the tone to be reset press the [RESET] key and select [DEFAULT]. • Single tone and monochrome resets cannot be performed. ViewSonic Corporation 7 CONFIDENTIAL -- DO NOT COPY PJ750