Hitachi-DVP505U-cd-sm维修电路原理图.pdf

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1、This is a device for DVD playback. This device is to be used by connecting it to the video input terminal of a TV set. ?Disc navigation system facilitates program search. ?Speedy operation by 2x speed drive. ADVICE Please carefully read this guide before using the device. The Hitachi DVD Player has

2、been designed to prevent fire, electrical shock, injury, or harmful radiation. It has been legally fabricated in accordance with the Electrical Appliances Act. Therefore, when using the device, please follow advice in this service guide to keep it safe to use. 1. In brief 2. Features SPECIFICATIONS

3、AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT. April 2000 Digital Media Products Division, Tokai SERVICE MANUAL DV-P505U DV-P505E DV-P505E(UK) DV-P505U(PX) TK NO. 9002E DVD PLAYER RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 I Before undertaking repair work, please read through this Precautions

4、 for safety. The following points should be observed in order to prevent accidents from happening and to ensure the safety of the device. !Degrees of danger or damage that can be caused by faulty operation are indicated by the following marks: !The following marks identify actions to be taken: PRECA

5、UTIONS FOR SAFETY(Please follow.) Under this mark, there is “Possible death or serious injury”. Under this mark, there is “Possible injury or material damage”. This mark indicates items to which You should pay attention. This mark indicates items You have to accomplish. This mark indicates: You shou

6、ld be cau- tious of electric shock. This mark indicates Forbidden items. !You should pay attention.!The original part installation and wiring route shall be restored. Where a special attention is required, it is indicated by a label or stamp. For example, on the cabinet, chassis, or parts. Please re

7、spect the indicated items and the Precautions for use of the manual. For safety, some parts are insulated by a tube or a tape, or installed without contact with substrate. The internal wiring is kept a distance from hot or high voltage parts by clamps or routing. Please restore them as initially don

8、e to prevent electric shock or fire from happening. !You should be cautious against electric shock. Please be careful during operations because there are high voltage and recharging parts inside. An electric shock or death may happen by touching them. When disassembling, assembling, or replacing a p

9、art, the power plug has to be pulled off. Touching by error a powered part may cause an electric shock, death, or injury. !Please check safety after servicing. Please check if dismounted screws, parts, and wires are reinstalled as before and if the area surrounding the repair is damaged. Please also

10、 measure insulation resistance with a ohmmeter and to confirm that it is more than 20M. There is risk of electric shock or fire if the insulation resistance is less than 20M. !Please use designated parts. Parts are characterized by uninflammability and voltage resistance. Therefore, parts having the

11、se same characteristics must be used in replacement. Especially for parts important in insuring safety, identified by in the schematic or parts list, a part with the identical part number shall be used. If a part with a different part number is used, an electric shock or a fire may occur. WARNING CA

12、UTION WARNING II Chapter 1System Introduction 1 System Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Hitachi DV-P505U/U(PX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Hitachi DV-P505E/(

13、UK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 System Outlook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14、 . . . . . . . . . . . . . . . . . . . .3 Display Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Rear Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Description of adop

15、ted new technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Digital signal circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Video circuit (DEC substrate). . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16、. . . . . . . . . . . .6 Video Output Circuit (VDO substrate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Audio Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 FRONT (FSW) SUBSTRATE CIRCUIT. . . . . . . . . .

17、 . . . . . . . . . . . . . . . . . . . . . .12 POWER SUPPLY CIRCUIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 CLOCK CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Troubleshooting. . . . . . . . . . .

18、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 VIDEO CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 AUDIO CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19、. . . . . . .17 About System Reset Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 System Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Chapter 2Removal and Replacement 21 General Information

20、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Disassembly Procedure Flowchart . . . . . . . . . . . . . . . . . . . . . . . .

21、. . . . . . . . . . . . . . .23 Disassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 Removing the Top Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 Removing the Foot Stand . . . . . . . .

22、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 Removing the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 Removing the MPEG Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Removing the Pow

23、er Supply Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 Removing the DVD-ROM Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 Removing the Outlet Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

24、8 Removing the Front Panel Control Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 Connector Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 Appendix A Schematics 33 Table Of Contents Chapter 11 System Specification Hitachi

25、DV-P505U/U(PX) Specification GeneralModel .DV-P505U/U(PX) Operating laser .Semi-conductor laser : Wave length 650nm(DVD) / 780nm(CD,VCD) Power supply . DV-P505U : AC120V, 60Hz . DV-P505U (PX) : AC110-240V, 50/60 Hz Power consumption .24W Weight. 3.7 kg Overall size .434 (W) x 284 (D) x 91 (H) mm All

26、owable operating temperature . +5C+35C Allowable operating humidity .1575% (no condensation) Component output terminalY output level . 1 Vp-p (75) PB output level . NTSC : 0.7 Vp-p (75) .PAL : 0.698 Vp-p (75) PR output level . NTSC : 0.7 Vp-p (75) .PAL : 0.698 Vp-p (75) Output terminal .pin jack S V

27、ideo output terminalY output level . 1Vp-p (75) C output level. NTSC : 0.286Vp-p (75) .PAL : 0.3Vp-p (75) Output terminal .S terminal Video outputOutput level. 1 Vp-p (synchronous when loaded at 75) output terminal .pin jack Audio outputOutput level.200mVrms (lkHz, -20dB) Mixed 2ch output. 1 system

28、(pin jack x 2) 5.1ch output . 1 system (pin jack x 6) Sound characteristics : Frequency characteristics.CD : 4Hz20kHz (EIAJ) .DVD : 4Hz22kHz (48k sampling) .4Hz44kHz (96k sampling) SN ratio.110 dB Dynamic range.90dB Total harmonic distortion rate.0.005% Wow/flutter .Measurement limit less than (0.00

29、1% W.PEAK)(EIAJ) Other terminalsDigital audio output optical/coaxial. Coaxial terminal : 1 (DTS/AC-3/MPEG2, LPCM, OFF commutable).Optical connector : 1 AccessoriesRemote control unit.1 Single AAA battery.2 AV cord.1 Power cord.1 AC socket (DV-P505U(PX) only) .1 System Introduction Chapter 1 2Chapter

30、 1 Hitachi DV-P505E/E(UK) Specification GeneralModel . DV-P505E/E(UK) Operating laser .Semi-conductor laser : Wave length 650nm(DVD) / 780nm(CD,VCD) Power supply . DV-P505E : AC230V, 50Hz Power consumption .24W Weight.3.7 Kg Overall size .434 (W) x 284 (D) x 91 (H) mm Allowable operating temperature

31、 . +5C+35C Allowable operating humidity .1575% (no condensation) AV connector output terminal AV connector output. 21-pin connector This connector provides the video and signals for connection to a color video TV monitor (or TV set) which has an AV CONNECTOR terminal. S Video output terminalY output

32、 level . 1Vp-p (75) C output level. NTSC : 0.286Vp-p (75) .PAL : 0.3Vp-p (75) Output terminal .S terminal Video outputOutput level. 1 Vp-p (synchronous when loaded at 75) Output terminal .pin jack Audio outputOutput level.200mVrms (lkHz, -20dB) Mixed 2ch output. 1 system (pin jack x 2) 5.1ch output . 1 system (pin jack x 6) Sound characteristics : Frequency characteristics.CD : 4Hz20kHz (EIAJ) .DVD : 4Hz22kHz (48k sampling) .4Hz44kHz (96k sampling) SN ratio.110 dB Dynamic range.