《HarmanKardon-DVD37.230-cd-sm维修电路原理图.pdf》由会员分享,可在线阅读,更多相关《HarmanKardon-DVD37.230-cd-sm维修电路原理图.pdf(117页珍藏版)》请在收音机爱好者资料库上搜索。
1、 harman kardon Model DVD 37DVD 37 DVD/CD/CD-R/CD-RW/VCD MP3 Player Service Manual CONTENTS ESD WARNING. 2 ELECTRICAL PARTS LIST. 14 SERVICING PRECAUTIONS. 3 PCB DRAWINGS.32 BASIC SPECIFICATIONS. 5 SEMICONDUCTOR PINOUT. 36 TROUBLESHOOTING GUIDE.10 BLOCK DIAGRAM. 112 PACKAGE AND PACKAGE PARTS11WIRING
2、DIAGRAM. 113 DISASSEMBLY12SCHEMATIC DIAGRAMS. 114 UNIT EXPLODED VIEW AND PARTS13 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York, 11797 Released 2007 Discontinued XXXXRev 0, 8/2007 RadioFans.CN Eu version 3 ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (s
3、olid 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 sh
4、ould 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
5、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 prev
6、ent 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
7、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 le
8、ads 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 i
9、nstalled. 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
10、 from a carpeted floor can gen- erate static electricity sufficient to damage an ESD device). 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)
11、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 i
12、mpact. 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
13、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
14、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.
15、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 lo
16、ok 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 RadioFans.CN 2 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs
17、 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 compon
18、ents 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 sup
19、ply 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 possibi
20、lity 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
21、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 harman/kardonService manual DVD37EU Page 4 of 117 DVD 37 TECHNICAL SPECIFICATIONS Applicable Disc
22、: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: D
23、VD 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 Out
24、put: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)
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- HarmanKardon DVD37 230 cd sm 维修 电路 原理图