HarmanKardon-DVD37-cd-sm2维修电路原理图.pdf

harman kardon Model DVD 37DVD 37 DVD/CD/CD-R/CD-RW/VCD MP3 Player Service Manual - Contents - SERVICE PRECAUTIONS.2 BASIC SPECIFICATIONS.5 DETAILED SPECIFICATIONS.6 PACKAGING.10 FRONT PANEL CONTROLS.11 INFORMATION DISPLAY.12 REMOTE CONTROL.13 REAR PANEL CONNECTIONS.16 CONNECTIONS/SETUP.17 TEST SCREEEN.25 BASIC TROUBLESHOOTING GUIDE26 DISASSEMBLY PROCEDURE.27 EXPLODED VIEW (120v).28 BLOCK DIAGRAM.29 ELECTRICAL PARTS LIST (120v) .30 PCB DRAWINGS.44 SEMICONDUCTOR PINOUTS50 SCHEMATICS.126 WIRING DIAGRAM.130 harman/kardon, Inc. 250 Crossways Park Dr. Released 2006 Woodbury, New York 11797 Rev0 7/2007 Discontinued XXXX 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 DVD37 harman/kardonharman/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 DVD37 harman/kardonharman/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). 4 DVD37 h ha ar rmmanan/k/karard do on n DVD 37 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, 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, linear PCM, MPEG,Windows Media9, DolbyDigital or DTSaudio 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 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 then use the Navigation Buttons n until the AUDIO ADJUSTMENTS submenu is highlighted within a white outline box, and press the Enter Button K. Figure 7 The following adjustments are available on the AUDIO ADJUSTMENTS menu for each speaker position. It is recommended that you cycle through the adjustments for each speaker position using the Navigation Buttons n to enter the settings that are appropriate for your system. SYSTEM SETUP DVD 37 (120V) OM 8/7/06 4:10 PM Page 22 22 DVD37 harman/kardonharman/kardon Pressing the Enter Button K displays a dropdown menu with the selections available for that setting. Use the Navigation Buttons n to highlight the appropriate setting, and then press the Enter Button K to select it. You will notice that the adjustments for speaker size and distance (used to calculate delay times) are set in tandem for the front left and right speaker pair, and for the surround left and right speaker pair. Changing the settings for either speaker in these pairs also affects that setting for the other speaker in that pair. For this reason, it is important to select the same brand and model for both speakers in each pair, and also to place them at about the same distance from the listening position. Speaker Size: Speaker size is part of the bass man- agement system which determines which frequencies are sent to the specific speaker position, and which are sent to the subwoofer.The designation of “size” does not refer to the speakers physical size, but rather to the lowest frequency a speaker can handle. For this purpose,“full-range” speakers are considered “large,” while those not capable of reproduction below 100Hz are considered “small.” In general, if you are using a packaged speaker system with smaller satellite- type speakers and a subwoofer, you should select Small for all five speakers. Large should only be selected if you are certain that your speakers are capable of handling extreme low-frequency sounds. Delay Time: This setting is used to compensate for the time it takes for sound to reach you from each speaker position, as some speakers may be placed further from the listening position than others. Select the distance from the speaker to your listening position by choosing one of the distance settings shown.This setting is not available for the subwoofer. Output Level: This setting is used to maintain bal- anced reproduction and sound field presentation.The goal is to make certain that the sound is heard from each speaker position with equal loudness.You may simply enter the same speaker level output settings already used for your receiver or processor.Alter- natively, you may use a test disc that outputs a fixed tone to all speakers at the same time and adjust the settings here so that the tone is heard at the same level (loudness) from all speakers. For the subwoofer, the settings are slightly different. Select On when a subwoofer is connected, or Off if one is not used.The second setting for the sub- woofer is the crossover.This determines which sounds will be sent to the subwoofer, and which to the main speakers when Small is selected as the speaker size for any of the speakers. Select the frequency from those shown that is closest to the lowest frequency your main (left/center/right/surround left/surround right) speakers are able to reproduce. If you are not familiar with that information, it may be found in the owners manual for your speakers.The output level should be set the same way as for the other speakers. When you have finished entering all settings on this menu, use the Navigation Buttons n to highlight the word Done at the bottom of the screen, and then press the Enter Button K to enter your settings into the DVD 37s memory. Video Setup Submenu This menu establishes the DVDs configuration for video format settings such as aspect ratio and output scan. It also allows access to the Video Adjustments banner (see next section). As with all setup menus, press the Setup Button j to activate the main menu screen, and then press the Navigation Buttons n until the VIDEO SETUP icon is highlighted, and then press the Enter Button K. Figure 8 The following adjustments are available on the Video Setup menu: Aspect Ratio: This setting selects the aspect ratio of video programming.Your choice should be made according to the shape of your video display and your personal preferences.When the HDMI Output 2 is used, the aspect ratio will automatically be set appro- priately for the specific display. However, you may select an alternate view. For most other video displays, make sure the Aspect Ratio setting is correct for your display.Two choices are available: 16:9: If you have a widescreen (16:9) display, or a display that has a widescreen mode, choose this setting.With this setting, the DVD 37 will adjust the output for widescreen movies so that they fill the entire screen in the proper aspect ratio. However, in this setting a disc recorded in the 4:3 aspect ratio will appear in the widescreen as a boxed image in the center, with black columns on the left and right side of the screen. If the widescreen option is chosen and a widescreen movie is played on a conventional 4:3 aspect-ratio set, the image will be distorteddue to vertical compression. 4:3: If you have a standard, 4:3 aspect ratio video display, choose this setting.You will see the entire frame of the movie as it is recorded on the disc without any image cutoff at the left and right sides. While this allows widescreen movies to be shown in their entirety, they will occupy a smaller portion of the screen and black “letterbox” bars may appear at the top and bottom of the screen. Video Output: This setting selects between the S-Video Output and Component Video Outputs , which are not available simultaneously If you have connected one of these outputs to your video display and the screen is blank, you will need to temporarily connect the Composite Video Output to your TV in order to view the on-screen menus and change this setting. Scan Type: This setting allows you to select between progressive and interlaced scanning for the Component Video Outputs to maximize the image resolution for the type of video display in use.The output at the S-Video and Composite Video outputs will always be standard-rate video that is compatible with any television set or video dis- play.Two choices are available: Progressive: Select this option if you have a video display that is compatible with input sources of 480P or greater. Displays labeled as “HDTV Ready,” including virtually all large-screen LCD and plasma displays, are compatible with progressive scan. Interlaced: Select this option when you are using an older video display that has Y/Pr/Pb component inputs, but which is not capable of displaying high scan rate, or “HD” signals. NOTES: 1.The Scan Type may only be changed when the Video Output setting has been set to Component. 2. If you have connected the DVD 37 to a video dis- play that is not capable of displaying progressive scan video using the Component (Y/Pr/Pb) Video Outputs , and you have inadvertently changed the Video Output Setting to Component and the Scan Type setting to Progressive, you