HarmanKardon-DVD48-cd-sm维修电路原理图.pdf

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1、 harman kardon Model DVD 48DVD 48 DVD/CD/CD-R/CD-RW/VCD MP3 Player Service Manual - Contents - SERVICE PRECAUTIONS.2 BASIC SPECIFICATIONS.5 DETAILED SPECIFICATIONS.6 PACKAGE (120V).10 FRONT PANEL CONTROLS.11 INFORMATION DISPLAY.13 REAR PANEL CONNECTIONS.14 REMOTE CONTROL.16 CONNECTIONS.19 INSTALLATI

2、ON.22 BASIC TROUBLESHOOTING GUIDE25 DISASSEMBLY PROCEDURE (120/230v).27 EXPLODED VIEW (120v).28 BLOCK DIAGRAM.29 ELECTRICAL PARTS LIST (120v) .30 PCB DRAWINGS.53 SEMICONDUCTOR PINOUTS59 SCHEMATICS.168 WIRING DIAGRAM.174 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev0 8/2007

3、Released 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

4、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 re

5、sult 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

6、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

7、 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

8、 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

9、 other exposed skin. Magnet How to hold the pick-up Conductive Sheet Cotton swab Pressure Pressure Drop impact 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

10、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,

11、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 instru

12、ments 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 leakag

13、e, 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 las

14、er beam from the pick-up should NEVER be directly facing the eyes or bare skin. Resistor (1 Mohm) Conductive Sheet Resistor (1 Mohm) Armband DVD48 harman/kardonharman/kardon RadioFans.CN 3 ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damag

15、ed 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

16、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 dischar

17、ging 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

18、 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

19、-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 togethe

20、r 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 P

21、OWER 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-

22、erate static electricity sufficient to damage an ESD device). 4 DVD48 h ha ar rmmanan/k/karard do on n DVD 48 TECHNICAL SPECIFICATIONS Please register your product on our Web site at . Note:Youll need your serial number.At the same time, you can choose to be notified about our new products and/or sp

23、ecial promotions. Applicable Disc: Disc formats:5-inch (12cm) or 3-inch (8cm) DVD- Video,DVD-Audio,SACD,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, dua

24、l side/dual layer Audio formats:DVD Audio MLP Lossless, SACD, Linear PCM, MPEG,Windows Media9, DolbyDigital or DTSaudio discs Still-image format:JPEG Video Signal System:NTSC or PAL HDMIOutput:Video: 480p, 720p, 1080i, 1080p HDMI Version 1.1-compliant HDCP Version 1.1-compliant Composite Video Outpu

25、t: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) The DVD 48 is Simplay

26、 HD-verified for compatibility via the HDMI connection with other Simplay HD-verified products. 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/Nois

27、e 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 to fast-search forward or in reverse; and to play, pause or stop the disc. After pressing the Pause Button, the Skip Buttons may be used to step frame by frame through

28、a video presentation, and the Fast-Search Buttons may be used for slow play. Angle:When a DVD encoded with multiple camera angles is playing and when the Angle Icon appears to indicate that the multiple-angle passage has been reached, press this button to cycle through the various available angles.

29、This button is also used to rotate still images. Each press rotates the image 90 degrees clockwise. Zoom:When viewing a DVD,VCD or JPEG still image, press this button repeatedly to enlarge the on-screen image by 1-1/2x, 2x, 3x or 4x (1-1/2x, 2x or 3x only for VCDs) before returning to the original s

30、ize. Use the Navigation Buttons to explore the enlarged image. /Navigation and Enter Buttons:These buttons are used together to make selections within the on-screen menu system. Backlight:Press this button to turn on the backlight to make it easier to see the buttons in a darkened room.The backlight

31、 will remain on for a few seconds after your last button press before going out, or you may turn off the backlight by pressing this button again. Video Off:Some people prefer to turn off the video display when listening to audio-only discs. Pressing this button deactivates the video circuitry, avoid

32、ing any possible interference with the audio. Moreover, plasma and CRT video displays are subject to “burn-in” when a still image, such as a menu, remains on screen for more than a short time. DVD 48 om.qxd 3/14/07 4:03 PM Page 14 16 DVD48 harman/kardonharman/kardon Power On IR Transmitter Lens Powe

33、r Off Subtitle Page Up/Down Title Numeric Keys Status Next Step/Skip Search/Slow Forward Transport Controls Zoom Return HDMI Enter Disc Menu Dimmer Stop Open/Close Audio Clear Program Repeat A-B Repeat Random Group Audio Mode Previous Step/Skip Search/Slow Reverse Angle Backlight System Setup Play V

34、ideo Off Pause / Navigation/ NOTE: To make it easier to follow the instruc- tions throughout the manual that refer to this illustration, a copy of this page may be down- loaded from the Product Support section at . REMOTE CONTROL FUNCTIONS DVD 48 om.qxd 3/14/07 4:03 PM Page 15 17 DVD48 harman/kardon

35、harman/kardon 1616 REMOTE CONTROL FUNCTIONS We strongly recommend that plasma and CRT owners use the Video Off function liberally. Press the button a second time to reactivate the video displays. NOTE: The DVD 48 features a screen saver that you may set to appear automatically after a period of inac

36、tivity. However, the screen saver does not become activated when the DVD 48s Setup menus are on screen.The DVD 48 also allows you to set one of two Auto Power Off modes in the GENERAL SETUP menu that turn off the DVD 48 after a longer period of inactivity. See the Initial Setup section for more info

37、rmation. Dimmer:Some people find the front-panel displays distracting, especially while watching a movie in a darkened room. Each press of this button cycles through the Full Brightness, Half Brightness and Off settings.The Power Indicator will always remain lit to remind you that the DVD 48 is turn

38、ed on. NOTE: You may enter commands and operate the DVD 48 normally even with the front-panel display fully dimmed.The display will wake for about one second when a command is entered. Audio Mode:This button adjusts the Analog Output setting, which is also found in the AUDIO SETUP menu. There are tw

39、o available settings: Multichannel and Stereo.The first button press displays the current setting, and each additional press toggles between the settings. The Stereo,or 2-Channel,setting outputs a 2-channel downmixed signal to both sets of Left/Right Analog Audio Outputs.The downmix incorporates cen

40、ter and surround channel information, but no signal is available at the center or surround jacks of the 6-Channel Analog Audio Outputs. The Multichannel, or 6-Channel, setting outputs only the front left and right channel information to both sets of Left/Right Analog Audio Outputs. Although the corr

41、ect signals are available at all of the 6-Channel Analog Audio Output jacks, the 2-Channel Analog Audio Outputs will contain incomplete information. The DVD 48 does not make a 2-channel downmix available at the 2-Channel Analog Audio Outputs simultaneously with a multichannel signal at the 6-Channel

42、 Analog Audio Outputs. HDMI:Press this button to turn the HDMI Output on or off.When the HDMI Output is on, the Component Video Outputs are off. If your video display is HDMI-capable, turn this setting on and use the HDMI connection. If your video display does not have an HDMI input, turn this setti

43、ng off to use the Component Video Outputs. DVD 48 om.qxd 3/14/07 4:03 PM Page 16 18 DVD48 harman/kardonharman/kardon 1818 CONNECTIONS There are different types of audio and video connections used to connect the DVD 48 to your receiver or processor and video display. To make it easier to keep them al

44、l straight, the Consumer Electronics Association (CEA) has established a color-coding standard.Table 1 may be helpful to you as a reference while you set up your system. Table 1 Connection Color Guide Types of Connections This section will briefly review different types of cables and connections tha

45、t you may use to set up your system. Audio and video signals originate in what are known as “source devices,” including a DVD/CD player such as the DVD 48. Separate connections are required for the audio and video portions of the signal unless an HDMI connection is used (see below).The types of conn

46、ections used depend upon whats available on your receiver, and for video signals, the capabilities of your video display. Audio Connections There are two formats for audio connections: digital and analog. Digital audio signals are required for listening to sources encoded with digital surround modes

47、, such as Dolby Digital and DTS.There are two types of digital audio connections commonly used: coaxial and optical. Either type of digital audio connection may be used, but never both simultane- ously. However, its okay to make both analog and digital audio connec- tions at the same time to the sam

48、e source. NOTE: The DVD 48 outputs digital audio signals through the HDMI connection. If your receiver/processor or video display is capable of processingthe audio portion of the HDMI signal, then you will not need to make a separate digital audio connec- tion. However, as explained in the Analog Au

49、dio section below, you may still need to make the analog audio connections. If your receiver/processor is only capable of switchingHDMI signals, use HDMI for your video connection only and connect either the DVD 48s coaxial or optical digital audio output to the corresponding input on your receiver. In addition, SACD audio is not transmitted via HDMI. Use the 2- or 6-Channel Analog Audio Outputs to enj