Cambridge-DVD79-dvd-sm 电路图 维修手册.pdf

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1、 Gallery Court Hankey Place London SE1 4BB UK Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 DVD79 DVD79 Issue Date: 31st May 2005 _ SERVICE MANUAL _ SPECIFICATIONS: Disc Types DVD, DVD-A, DVD-V, MP3, CD-RW, CD-R, CD-DA, Kodak Picture CD DIVX Audio Formats 5.1 and Stereo Downmix LPCM 16 bit 44.1k

2、Hz Dolby Digital 5.1 24 bit 96kHz DTS Output (digital audio out only) DVD Audio 2 Channel 24 bit 192kHz DVD Audio 5.1 (MLP) 24 bit 96kHz Video Composite Video (CVBS) S-Video (SVHS) RGB DVI-D (Digital Video Interface) Component (YCbCr ) PAL/NTSC Interlaced/Progressive Scan THD (unweighed) 103dB Frequ

3、ency Response 5Hz 20kHz Video Amplitude 1.0V pk-pk (75 ohms) S-Video Amplitude Y: 1.0V pk-pk (75 ohms) C: 0.286V pk-pk (75 ohms) Power Supply 100-240V AC50/60Hz Max Power Consumption 40W Dimensions (mm) (H x W x D) 55 x 430 x 263 Weight (kg) 2.56kg AP19472/1 1 RadioFans.CN 收音机爱 好者资料库 DVD79 SERVICE M

4、ANUAL TABLE OF CONTENTS Safety Precautions 3 Front Panel / Remote Control Button Locations & Explanations 4 Prevention of Static Electricity Discharge 5 Mechanism Unit Exploded Diagram 6 Bracket Exploded View and Parts List 7 Protection of the Laser Diode 8 Video Output Confirmations Luminance & Chr

5、ominance Signal 9 (U201) Pin Diagram 10 (U201) Pin Description 11-15 AM29LV160D Connection Diagrams 16-17 HY57V641620HG Pin Configuration and Description 18 HY57V641620HG Functional Block Diagram 19 (U205) Pic Details 20 Front Panel Display PCB Schematic 21 Front Panel PCB Layout 22 Power Supply PCB

6、 Schematic 23 Power Supply PCB Layout 24 Output PCB Schematic 25 Output PCB Layout 26 Video Output Schematic 27 Main PCB Schematics 28 - 29 Main PCB Layout 30 Servo / DSP Schematic 31 Servo / DSP PCB Layout 32 Material List (Non-Service Parts) 33 - 43 2 RadioFans.CN 收音机爱 好者资料库 1. When servicing, obs

7、erve the original lead dress. if a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 2. After servicing, see to it that all the protective devices such as insulation barrier, insulation papers shields are properly installed. 3. After servicing, mak

8、e the following leakage current checks to prevent the customer from being exposed to shock hazards. Some semiconductor(solid state)devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive(ES)Devices. Examples of typical ES devices are integ

9、rated circuits 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 electro static discharge(ESD). 1. Immediately before handling any semiconductor component or semiconductor-equipped a

10、ssembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly

11、equipped with ES devices,place the assembly on a conductive surface such as alminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder removal device. Some solder rem

12、oval devices not classified as anti-static (ESD protected)can generate electrical charge sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective packa

13、ge until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, alminum foil or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES d

14、evice, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Other

15、wise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity(ESD). COPYRIGHT NOTICE. 2005 Audio Partnership PLC. All rights reserved. Cambridge Audio is a registered trademarks of Audio Partnership PLC. Th

16、is document may not be reproduced, distributed, transmitted, displayed, published, or broadcast without the express written prior permission of Audio Partnership PLC. Alteration or removal of any trademark, copyright, or other notice from this content is prohibited. Information provided in this docu

17、ment is provided solely for the use of official service agents in repairing and servicing Audio Partnership PLC products. Cambridge Audio DVD79 DVD Player Safety Precautions 3 RadioFans.CN 收音机爱 好者资料库 Cambridge Audio DVD79 DVD Player Front Panel / Remote Control Button Locations & Explanations FRONT

18、PANEL CONTROLS POWERPOWER Power switch O Op pe en/Cn/Cl lo os se e Allows you to open and close the disc tray to load a disc. The disc will begin loading when the tray is closed. Pressing Play will also close the tray and start the Disc. P Pla lay/Py/Pausause e Plays the disc and pauses play. StSto

19、op p Stops the Disc playing. If Play is pressed shortly afterwards, the DVD will resume play in the place where it was stopped. A Compact disc will stop and a message will appear on screen. Press PLAY to continue. SkSki ip/Scap/Scan n Allows for skipping between the chapters on the DVD disc or track

20、s on a CD. 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 1 10 0 1 14 4 1 15 5 1 16 6 1 17 7 1 18 8 1 19 9 2 20 0 2 21 1 2 22 2 2 23 3 1. Eject 2. Number buttons 3. Zoom 4. Angle 5. Menu 6. Return 7. Volume 8. Mute 9. Clear 10. A-B Button 11. Skip Fwd 12. Skip Back 13. OSD 14. PAL/NTSC 15. Standby 16. Audio 17

21、. Subtitle 18. Title 19. Select 20. Setup 21. Play/Stop/Pause 22. Slow 23. Mode 24. PSM 25. Repeat 26. Scan Prev 27. Scan Rev 28. I-Scan 29. P-Scan 1 11 1 1 12 2 USING THE REMOTE HANDSET When you have unpacked your remote handset, insert the supplied AAA batteries to activate it. The remote can cont

22、rol all of the standard playback options but is also important in setting up your DVD player as many of the menus are most easily accessed from the remote. 1 13 3 2 24 4 2 25 5 2 26 6 2 27 7 2 28 8 2 29 9 4 86-756-8687998 Cambridge Audio DVD79 DVD Player Prevention of Static Electricity Discharge Th

23、e laser diode in the traverse unit (optical pickup) may break down due to static electricity of clothes or human body. Use due caution to electrostatic breakdown when servicing and handling the laser diode. Some devices such as the DVD player use the optical pickup(laser diode)and the optical pickup

24、 will be damaged 1. Worktable grounding Put a conductive material sheet on the area where the optical pickup is placed, and ground the sheet. Use the anti-static wrist strap to discharge the static electricity from your body. 2. Human body grounding 3. Handling of optical pickup 3.1. To keep the goo

25、d quality of the optical pickup maintenance parts during transportation and before installation, the both ends of the laser diode are short-circuited.After replacing the parts with new ones, remove the short circuit according to the correct procedure. (See this Technical Guide). 3.2. Do not use a te

26、ster to check the laser diode for the optical pickup .This will damage the laser diode due to the power supply in the tester. 4. Handling precautions for Traverse Unit (Optical Pickup) 4.1. Do not give a considerable shock to the traverse unit(optical pickup)as it has an extremely high-precise struc

27、ture. 4.2. When replacing the optical pickup, install the flexible cable and cut is short land with a nipper. See the optical pickup replacement procedure in this Technical Guide. Before replacing the traverse unit, remove the short pin for preventingstatic electricity and install a new unit. Connec

28、t the connector as quickley as possible. 4.3. The flexible cable may be cut if an excessive force is applied to it. Use caution when handling the cable. safety_3 (1577x409x2 tiff) 5 Cambridge Audio DVD79 DVD Player 6 86-756-8687998 Cambridge Audio DVD79 DVD Player Bracket Exploded View and Parts Lis

29、t 1.bracket 14. front silicon rubber 2.belt 15. Back silicon rubber 3.screw 16. Pick-up 4.belt wheel 17. Pick-up 5.gearwheel 18. switch 6.iron chip 19. Five-pin flat plug 7. Immobility mechanism equipment 20. screw 8. Magnet 21. PCB 9. Platen 22. motor 10. Bridge bracket 23. Motor wheel 11. screw 24

30、. screw 12. screw 25.tray 13. Big bracket 7 Cambridge Audio DVD79 DVD Player Protection of the Laser Diode Short the parts of LD circuit pattern by soldering. 5.3.2 Cautions on assembly and adjustment Make sure that the workbenches,jigs,tips,tips of soldering irons and measuring instruments are grou

31、nded,and that personnel wear wrist straps for ground. Open the LD short lands quickly with a soldering iron after a circuit is connected. Keep the power source of the pick-up protected from internal and external sources of electrical noise. Refrain from operation and storage in atmospheres containin

32、g corrosive gases (such as H2S,SO2, NO2 and Cl2)or toxic gases or in locations containing substances(especially from the organic silicon,cyan, formalin and phenol groups)which emit toxic gases.It is particularly important to ensure that none of the above substances are present inside the unit.Otherw

33、ise,the motor may no longer run. 8 Cambridge Audio DVD79 DVD Player Video Output Confirmations - Luminance & Chrominance Signal Do these confirmations after replacing a P.C.B. - (Luminance Signal) Purpose:To maintain video signal output compatibility. 1.Connect the oscilloscope to the video output t

34、erminal and terminate at 75 ohm. 2.Confirm that luminance signal(Y+S)level is 1000mVp-p30mV Measurement point Video output terminal Color bar 75% PLAY(Title 46):DVDT-S15 PLAY(Title 12):DVDT-S01 DVDT-S15 or DVDT-S01 ModeDisc Measuring equipment,tools 200mV/dir,10sec/dir1000mVp-p30mV Confirmation valu

35、e (Chrominance Signal) Purpose:To maintain video signal output compatibility. 1.Connect the oscilloscope to the video output terminal and terminate at 75 ohme. 2.Confirm that the chrominance signal(C)level is 621 mVp-p30mV Measurement point Video output terminal Color bar 75% PLAY(Title 46):DVDT-S15

36、 PLAY(Title 12):DVDT-S01 DVDT-S15 or DVDT-S01 ModeDisc Measuring equipment,toolsConfirmation value Screwdriver,Oscilloscope 200mV/dir,10sec/dir621mVp-p30mV 9 1 5 5 1 5 0 1 4 5 1 4 0 1 3 5 1 3 0 1 2 5 1 2 0 1 1 5 1 1 0 1 0 5 1 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 5 6 0 1 0 0 9 5 9 0 8 5 8 0 7

37、5 7 0 2 0 5 1 9 5 2 0 0 1 6 0 1 6 5 1 7 0 1 7 5 1 8 0 1 8 5 1 9 0 HSYNC1_PORT1 VDD1 B/Cb/D1_0 VSS IN_CLK1_PORT1 FIELD ID1_PORT1 VSYNC1_PORT1 HSYNC2_PORT1 IN_CLK2_PORT1 FIELD ID2_PORT1 VSYNC2_PORT1 B/Cb/D1_6 B/Cb/D1_5 B/Cb/D1_4 B/Cb/D1_3 B/Cb/D1_2 B/Cb/D1_1 B/Cb/D1_7 VDDcore1 VSScore R/Cr/Cb Cr_0 R/C

38、r/Cb Cr_6 R/Cr/Cb Cr_5 R/Cr/Cb Cr_4 R/Cr/Cb Cr_3 R/Cr/Cb Cr_2 R/Cr/Cb Cr_1 R/Cr/Cb Cr_7 VDD2 VSS G/Y/Y_0 G/Y/Y_1 G/Y/Y_6 G/Y/Y_5 G/Y/Y_4 G/Y/Y_3 G/Y/Y_2 G/Y/Y_7 VDDcore2 VSScore IN_SEL TEST DEV_ADDR1 DEV_ADDR0 SCLK SDATA RESET_N VDD3 VSS SDRAM DATA(0) SDRAM DATA(2) SDRAM DATA(1) SDRAM DATA(3) SDRAM

39、DATA(10) SDRAM DATA(9) SDRAM DATA(8) SDRAM DATA(7) SDRAM DATA(6) SDRAM DATA(5) SDRAM DATA(4) SDRAM DATA(17) SDRAM DATA(16) SDRAM DATA(15) SDRAM DATA(14) SDRAM DATA(12) SDRAM DATA(13) SDRAM DATA(11) VDD4 VSS VDDcore3 VSScore SDRAM DATA(20) SDRAM DATA(19) SDRAM DATA(18) SDRAM DATA(31) SDRAM DATA(30) S

40、DRAM DATA(29) SDRAM DATA(28) SDRAM DATA(26) SDRAM DATA(27) SDRAM DATA(25) SDRAM DATA(24) SDRAM DATA(23) SDRAM DATA(21) SDRAM DATA(22) VDDcore4 VSScore VSS VDD5 TEST IN SDRAM ADDR(10) SDRAM ADDR(5) SDRAM ADDR(4) SDRAM ADDR(3) SDRAM ADDR(6) SDRAM ADDR(7) SDRAM ADDR(8) SDRAM ADDR(9) VDDcore5 VSScore SD

41、RAM ADDR(0) SDRAM ADDR(1) SDRAM ADDR(2) SDRAM WEN B/U/Pb_OUT_7 VDDcore7 VSScore R/V/Pr_OUT_7 VDD8 VSS G/Y/Y_OUT_7 G/Y/Y_OUT_1 G/Y/Y_OUT_2 G/Y/Y_OUT_3 G/Y/Y_OUT_4 G/Y/Y_OUT_5 G/Y/Y_OUT_6 G/Y/Y_OUT_0 R/V/Pr_OUT_0 R/V/Pr_OUT_1 R/V/Pr_OUT_2 R/V/Pr_OUT_3 R/V/Pr_OUT_4 R/V/Pr_OUT_5 R/V/Pr_OUT_6 B/U/Pb_OUT_

42、0 B/U/Pb_OUT_1 B/U/Pb_OUT_2 B/U/Pb_OUT_3 B/U/Pb_OUT_4 B/U/Pb_OUT_5 B/U/Pb_OUT_6 VSS VDD7 CLKOUT VSScore VDDcore6 TEST OUT1 CTLOUT4 CTLOUT0 CTLOUT1 CTLOUT2 CTLOUT3 TEST OUT0 TEST3 SDRAM CLKIN SDRAM CLKOUT VSS VDD6 SDRAM DQM SDRAM CASN SDRAM BA1 SDRAM BA0 SDRAM CSN SDRAM RASN OE PLL_PVDD PLL_PVSS AVSS

43、_PLL_BE1 AVDD_PLL_BE1 AVSS_PLL_SDI AVSS_PLL_FE AVSS_PLL_BE2 AVDD_PLL_FE AVDD_PLL_SDI AVDD_PLL_BE2 DAC_PVSS DAC_VDD DAC_VSS DAC_B_OUT DAC_G_OUT DAC_R_OUT DAC_AVDDB DAC_AVDDR DAC_AVDDG DAC_AVSSB DAC_AVSSR DAC_AVSSG DAC_COMP DAC_RSET DAC_VREFOUT DAC_VREFIN DAC_AVDD DAC_AVSS DAC_GR_AVSS DAC_GR_AVDD DAC_

44、PVDD TEST0 TEST1 TEST2 XTAL IN XTAL OUT VDD9 VSS HSYNC_PORT2 IN_CLK_PORT2 FIELD ID_PORT2 VSYNC_PORT2 VSScore VDDcore8 D1_IN_0 D1_IN_7 D1_IN_6 D1_IN_5 D1_IN_4 D1_IN_3 D1_IN_2 D1_IN_1 Cambridge Audio DVD79 DVD Player (U201) Pin Diagram 10 Pin No Pin Name I/O Type Voltage Tolerance Drive Internal Pull

45、up/ Pulldown Description 1 HSYNC1_PORT1 Input 5v Horizontal sync or reference -CTL1 of Port 1 2 VSYNC1_PORT1 Input 5v Vertical sync or reference -CTL1 of Port 1 3 FIELD ID1_PORT1 Input 5v Odd/Even Field identification -CTL1 of Port 1 4 IN_CLK1_PORT1 Input 5v Data Clock input -CTL1 of Port 1 5 HSYNC2

46、_PORT1 Input 5v Horizontal sync or reference CTL2 of Port 1 6 VSYNC2_PORT1 Input 5v Vertical sync or reference CTL2 of Port 1 7 FIELD ID2_PORT1 Input 5v Odd/Even Field identification CTL2 of Port 1 8 VDD1 Power 3.3 V - Power pin for IO 9 VSS Ground Ground 10 IN_CLK2_PORT1 Input 5v Data Clock input C

47、TL2 of Port 1 11 B/Cb/D1_0 Input 5v Port 1 Digital video input (Blue/Cb/D1) 12 B/Cb/D1_1 Input 5v Port 1 Digital video input (Blue/Cb/D1) 13 B/Cb/D1_2 Input 5v Port 1 Digital video input (Blue/Cb/D1) 14 B/Cb/D1_3 Input 5v Port 1 Digital video input (Blue/Cb/D1) 15 B/Cb/D1_4 Input 5v Port 1 Digital video input (Blue/Cb/D1) 16 VDDcore1 Power 1.8 V - Power pin for core 17 VSScore Ground Ground 18 B/Cb/D1_5 Input 5v Port 1 Digital video input (Blue/Cb/D1) 19 B/Cb/D1_6 Input 5v Port 1 Digital video input (Blue/Cb/D1) 20 B/Cb/D1_7 Input 5v Port 1 Digital video i