ViewSonic PJ501 Service Manual - Page 13

Adjustment procedure 2 (visual inspection) 1. First adjust [MIN] tone [G:]. 2. Select [No.2] [G:]. If the background is [G] monochrome, press the [MENU SELECT] key on the Remote control transmitter to change to solid white. 3. View measurement point [No.2] and [No.3]. Lower the [G] color intensity only of the color point whose [G] color is more intense than measurement point [No.1]. 4. View measurement point [No.10] and [No.11]. Lower the [G] color intensity only of the color point whose [G] color is more intense than measurement point [No.1], and raise the intensity of the point whose color intensity is lower than measurement point [No.1]. 5. Now adjust the [MIN] tone for colors [R] and [B]. 6. View measurement points [No.2], [No.3], [No.10] and [No.11]. Adjust the [R] and [B] of each measurement point so that they have the same color as measurement point [No.1]. Adjustment technique: First, adjust [B:] of the point whose color is to be adjusted so that it approximates that of [No.1]. If [R:] is low at this time, the image will have cyan cast, in which case [R:] is increased. On the other hand, if [R:] is excessive, the image will have a magenta cast, in which case [R:] is decreased. Overall, a cyan cast makes it easy to see color shading. 7. Next, view measurement points [No.4], [No.5], [No.12], [No.13] and make similar adjustments. 8. Then adjust measurement points [No.6], [No.7], [No.8], [No.9], [No.14], [No.15], [No.16] and [No.17]. This completes the [MIN] tone adjustments. 9. Make similar another three tones as described in steps 1 to 8 above. ViewSonic Corporation 10 Confidential - Do Not Copy PJ501/PJ551