HARMAN KARDON DVD27
Service Manual

DVD27

harman/kardon

TEST SCREEN
DVD is one of the highest quality sources ever made available for in-home playback of prerecorded pictures and sound. In order to make certain that your home theater system is fully optimized to take advantage of DVD�s superb picture quality, the DVD 27 offers a built-in video test signal that makes it easy to calibrate your TV or video display for proper playback. and evenly changing from black to white, going from left to right. Contrast Adjustment: 1. Adjust the contrast on your TV until you see a bright white bar in the lower right corner of the screen and a deep-dark-black bar to the left. The optimal contrast setting will depend on your preference and the surrounding light in the TV room. 2. If the brightness of the white bar no longer increases when the contrast is turned up or the borders of the white �harman/kardon� letters on top bloom (overlight) into the black areas (drastically decreasing the sharpness of the type), the contrast has been turned up too much. Reduce the contrast until these effects disappear and the video still looks realistic. 3. If you are watching TV with customary surrounding daylight, adjust the contrast so that a normal video picture has about the same look as the surroundings in your room. That way the eye is relaxed when watching the TV picture. This contrast setting may be reduced when the surrounding light is dimmed, thereby usually improving the sharpness of a video significantly. 4. The gray scale in the middle line needs to have the same clear difference between each bar as before the contrast adjustment. If not, go back to �Brightness Adjustment� and repeat Step 3 and then �Contrast Adjustment,� making only minor adjustments each time for optimization. Color Adjustment 1. When the brightness and contrast are set optimally, turn up the color control to the level of your preference. Adjust to the level where the colors look strong but still natural, not overdone. If the color level is too high, depending on the TV, some of the bars will seem wider or the color intensity will not increase while the control is turned up. Then the color control must be reduced again. Ultimately, you also should test the color intensity with a video � e.g., pictures of natural faces, flowers, fruit and vegetables, and other common natural articles for an optimal setting of the color intensity. 2. Use the large white bar below the gray scale to tweak the warmth of the picture. Every viewer has a preference as to how the glow of the picture should be. Some prefer a little colder picture, some a warmer glow. The Tint function on your TV and the white bar can be used to control this. Adjust the Tint to the level where you feel the white color has the tone you prefer. Sharpness Adjustment Contrary to intuition, the picture will appear sharper and clearer with the sharpness, or Edges, setting backed off from the maximum setting. Reduce the sharpness setting on your television, and the Edges setting on the DVD 27 video adjustments menu if necessary, to minimize the appearance of any white lines between the bars in the gray scale portion of the test screen. Convergence and Edge Focus The crosshatch pattern that surrounds the test screen may be used to evaluate edge focus and convergence in front- or rear-projection video displays. However, the controls used to adjust these parameters are often not user-accessible. In any event, these adjustments are extremely complex, and require proper training and experience to avoid worsening the situation. Therefore, it is recommended that if you are unable to improve the picture using the available controls, contact the video display manufacturer�s authorized service representative for assistance. When all desired setup and configuration entries have been made, use the �¤ Navigation Buttons n until �Done� is highlighted at the bottom of the Video Adjustments submenu. Press the Enter Button s to select it to return to the on-screen menu system. Then, press the Setup Button j to remove the menu displays from the screen. The unit will return to normal operation and you are ready to enjoy the finest in DVD or CD playback!

Test Screen
With the test screen showing on your video display, the following adjustments may be made: � The proper color intensity setting on your TV. � Proper color adjustments using the color bars, which should be (left to right) black, white, yellow, cyan (turquoise), green, magenta, red, blue, black. � The proper color transition, seen as sharp separation of the bars. � The performance of the color circuits in your TV (with �Video� signals); bar edges should show no vertical crawling dots. With the gray scale and the black/white fields below the color bars, the brightness and contrast of your screen can be adjusted. NOTE: Most of the video adjustments using the DVD 27�s test screen should be made using the controls on your video display, with the DVD 27�s controls set at their factory default position in the center. If necessary, you may tweak the brightness and sharpness using the controls found in the DVD 27�s video adjustments menu.

Color Bars

Gray Scale 100% Black/White Fields

Figure 9

TV Picture Adjustment With Test Screen Brightness Adjustment: 1. Turn down the color control on your TV until the color bars are visible in black and white. 2. Adjust the contrast on your TV to the lowest level where you still can see all bars within the gray scale in the test picture separately and clearly. 3. Adjust the brightness using the DVD 27 video adjustments control so that the bars in the gray scale are all visible. The bar furthest to the left has to be as black as possible rather than gray, but the next gradation must clearly be distinct from it. All the bars in the gray scale should be gradually

TEST SCREEN

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