Harman Kardon AVR 660/230 Service Manual

10ADVANCED FuNCTIONSNoise Reduction: Adjust this setting to Low, Medium or High to filter outsignal noise, or turn it off.MPEG Noise Reduction: This setting is designed to address two specifictypes of video distortion, mosquito noise and blocking artifacts. If you seehaziness or shimmering around the edges of objects or the scrolling creditsin a film, or if the image appears to “pixellate” into blocks, change the MPEGNoise Reduction setting from Off to Low, Medium or High.Cross Color Suppressor: Turn this setting on to remove cross colorartifacts, which can occur when high-frequency luminance (brightness)signals are misinterpreted as chroma (color) signals, causing unwantedflickering, flashing colors or rainbow patterns.Flesh Tone Enhancement: Turn this setting on to improve theappearance of actors’ skin tones.Black Level: This setting is only effective when used with the CompositeVideo Output. Turn it on for a full black-level setting that provides the fulldynamic range of black as presented on most DVDs. When turned off, thesetting complies with NTSC standards for video with “setup”, and may be moreappropriate when your video display has limited video processing capability.Deinterlacing: For historical reasons, video in the NTSC format wasinterlaced. That is, each refresh of the television screen displayed only half thepixels in a frame, alternating between all of the even rows of pixels and all ofthe odd rows. Modern displays are capable of displaying the complete frameall at once by progressively scanning all of the rows of pixels from top tobottom. For optimal viewing on a progressive-scan display (most flat-paneldisplays), the video images must be deinterlaced. When viewing images viathe Composite or S-Video Monitor Output, or any time the AVR’s video outputresolution is 576i, this setting may be turned off.Film Mode Detect: This setting is only accessible when the Deinterlacingsetting is turned on. It compensates for the different frame rates in whichfilm and video are shot. Film is shot at a rate of 24 frames per second(progressive scan), while video is shot at slightly less than 60 frames persecond (interlaced). The AVR is able to detect whether the program wasoriginally shot on film and transferred to video (e.g., to create a DVD), andto compensate appropriately for any authoring errors in the conversion.Select a setting of 3:2 (for NTSC materials), 2:2 (for PAL materials originatingoverseas), Off or Auto.How to adjust the custom picture SettingsSet the Video Mode to Custom to display the picture settings, as shown inFigure 35.Figure 35 – Video Modes Custom ProcessingWith a color bar test pattern from a test disc or other source on screen, thefollowing adjustments may be made:The color intensity setting on your TV.•Color adjustments using the color bars, which may be (left to right) black,•white, yellow, cyan (turquoise), green, magenta, red, blue, black.The 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.Use the gray scale and the black/white fields in the test pattern to adjust thebrightness and contrast.Brightness AdjustmentTurn down the color control on your TV until the color bars appear in black1.and white.Adjust the contrast to the lowest level where you still can see all gray scale2.bars separately and clearly.Adjust the brightness so that the bars in the gray scale are all visible. The3.bar farthest to the left has to be as black as possible rather than gray butthe next gradation must clearly be distinct from it. The bars in the grayscale should gradually and evenly change from black to white.Contrast AdjustmentAdjust the contrast on your TV until you see a bright white bar in the lower1.right corner of the screen and a deep-dark-black bar to the left.If the brightness of the white bar no longer increases when the contrast2.is turned up or the borders of white letters bloom (overlight) into theblack areas (drastically decreasing the sharpness of the type), the contrasthas been turned up too much. Reduce the contrast until these effectsdisappear and the video still looks realistic.If you are watching TV with ambient daylight, adjust the contrast so that3.a normal video picture looks the same as the surroundings in your room;that way the eye is relaxed when watching the TV picture. Reduce thesetting when the surrounding light is dimmed to improve the sharpnessof the picture.The gray scale in the middle line should retain the same distinction4.between each bar as before the contrast adjustment. If not, repeat bothStep 3 of the Brightness Adjustment and the Contrast Adjustment.Color AdjustmentWhen the brightness and contrast are set optimally, adjust the color1.control. Set the level so that the colors look strong but still natural, notoverdone. If the color level is too high, depending on the TV, some of thebars will seem wider or the color intensity will not increase when thecontrol is turned up. Test the color intensity with a video of pictures offaces, flowers, fruit and vegetables.Refer to the large white bar below the gray scale to tweak the warmth of2.the picture using the Tint control on your TV.AVR 660 -760, 230V Service ManualPage 45 of 264