HarmanKardon-DVD47-cd-sm维修电路原理图.pdf

harman kardon Model DVD 47DVD 47 DVD/CD/CD-R/CD-RW/VCD MP3 Player Service Manual - Contents - SERVICE PRECAUTIONS.2 BASIC SPECIFICATIONS.5 PACKAGE (120V).6 FRONT PANEL CONTROLS.7 INFORMATION DISPLAY.8 REMOTE CONTROL.9 REAR PANEL CONNECTIONS.12 CONNECTIONS/SETUP.13 TEST SCREEEN.15 PLAYBACK BASICS.16 BASIC TROUBLESHOOTING GUIDE18 EXPLODED VIEW (120v).19 DISASSEMBLY PROCEDURE (120/230v).20 BLOCK DIAGRAM.22 ELECTRICAL PARTS LIST (120v) .23 PCB DRAWINGS.40 SEMICONDUCTOR PINOUTS43 SCHEMATICS.96 WIRING DIAGRAM.101 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev0 7/2006 RadioFans.CN 1 SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. 2. Repair notes 1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched. 4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged. 5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cot- ton swab should be used, taking care not to distort this. 6) Never attempt to disassemble the pick-up. Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. Storage in conductive bag NEVER look directly at the laser beam, and dont let contact fingers or other exposed skin. Magnet How to hold the pick-up Conductive Sheet Cotton swab Pressure Pressure Drop impact DVD47 DVD47 harman/kardon RadioFans.CN 2 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These compo- nents are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care. 2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnetism is present, or where there is excessive dust. 2. Notes for repair 1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) All equipment, measuring instruments and tools must be grounded. 3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounded. 5) Workers should be grounded by an armband (1M) 6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband. 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. Resistor (1 Mohm) Conductive Sheet Resistor (1 Mohm) Armband DVD47 DVD47 harman/kardon RadioFans.CN 3 ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components com- monly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated cir- cuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive sur- face such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static can generate electrical charges sufficient to damage ESD devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices. 6. Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials). 7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into which the device will by installed. CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS. 8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gen- erate static electricity sufficient to damage an ESD device). DVD47 DVD47 harman/kardon 4 DVD 47 TECHNICAL SPECIFICATIONS Applicable Disc:Disc formats: 5-inch (12cm) or 3-inch (8cm) DVD-Video, DVD-Audio, standard-conforming DVD-R, DVD+R, DVD-RW, DVD+RW, SACD,VCD, CD, CD-R, CD-RW or MP3 discs Region code: DVD Video disc with Code 1 or 0 only DVD-Layers: Single side/single layer, single side/dual layer, dual side/dual layer Audio formats: DVD-Audio MLP lossless, SACD 2-channel or multichannel, Linear PCM, MPEG,Windows Media9, Dolby Digital or DTS Audio discs Still-image format: JPEG Video Signal System:NTSC HDMIOutput:Video: 480p, 720p, 1080i HDMI Version 1.0-compliant HDCP Version 1.1-compliant Composite Video Output:1V p-p/75 ohms, sync negative polarity S-Video Output:Y/Luminance: 1V p-p/75 ohms, sync negative polarity C/Chrominance: 0.286V p-p Component Video Output:Y: 1V p-p/75 ohms, sync negative polarity Pr: 0.7V p-p/75 ohms Pb: 0.7V p-p/75 ohms Analog Audio Output:2V rms (1kHz, 0dB) Frequency Response:DVD (Linear PCM): 2Hz 22kHz +0/0.5dB (48kHz sampling) 2Hz 44kHz +0/1.5dB (96kHz sampling) 2Hz 88kHz +0/0.5dB (192kHz sampling) CD: 2Hz 20kHz +0/0.5dB SACD: 2Hz 100kHz +0/0.5dB Signal/Noise Ratio (SNR):105dB (A-weighted) Dynamic Range:DVD: 100dB (18-bit)/105dB (20-bit) CD/DVD: 96dB (16-bit) THD/1kHz:DVD/CD: 0.0025% Wow 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 47s test screen should be made using the controls on your video display, with the DVD 47s 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 47s video adjustments menu. Figure 10 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 47 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 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 (over- light) 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 surround- ings 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 prefer- ence.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 veg- etables, 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 47 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 manufacturers authorized service repre- sentative 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 t 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! Color Bars Gray Scale 100% Black/White Fields TEST SCREEN 25 DVD 47 (120V) OM 3/30/06 10:41 AM Page 25 DVD47 DVD47 harman/kardon 15 26PLAYBACK BASICS Loading Discs To load discs in the DVD 47, first turn the DVD 47 on by pressing in the Power On/Off Switch1 or Power On Button0. Note that the Power Indicator?will turn amber when the unit is con- nected to an AC power source. It will turn blue when the Power On Button0is pressed. Next, press the Open/Close Button 1Auntil the disc tray opens. Hold the disc by the edge, and gently place it into the disc drawer, making certain that the disc is properly seated in the trays insert. If the disc is not correctly centered, you may damage both the disc and the player when the drawer closes.When loading discs, please note the following: The DVD 47 will play discs with the following logos as well as most DVD-RW or DVD+RW discs and most WMA and JPEG discs, including Kodak Picture CDs, but not Kodak Photo CDs. DO NOT attempt to play another type of disc. The DVD 47 will only display video in the NTSC for- mat.Although the PAL format is generally used in Europe and other regions of the world outside North America, some music or other DVDs are available in PAL with a Region Code of “0,” which means they may be played on any DVD player around the world. The DVD 47 will automatically detect the PAL for- mat, and make the necessary conversions so that the video may be displayed on an NTSC TV. PAL discs bearing a Region Code other than “0” or “1” may not be played on the DVD 47. Playback capability for CD-RW, DVD-RW, DVD-R, DVD+RW or DVD+R discs will vary according to the quality of the disc. On some occasions it is possible that these discs may not play on the DVD 47.This does not indicate any problem with the DVD 47. The DVD 47 will only play discs that are coded for Region 1 or discs that are open to being played in all regions (Region Code “0”). Discs that contain a Region Code of 2, 3, 4, 5 or 6 (as noted by a number inside a world map logo on the discs cover jacket or case) will not play. Both 5-inch (12cm) and 3-inch (8cm) discs may be used. When loading CDs, SACDs or DVD-Audio discs, load the discs with the label side up. When loading DVD-Video discs with printed l