Cambridge-DVD79-dvd-sm维修电路原理图.pdf

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 44.1kHz 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 Frequency 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 1RadioFans.CN 收音机爱 好者资料库 DVD79 SERVICE MANUAL 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 & Chrominance 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 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 2RadioFans.CN 收音机爱 好者资料库1. When servicing, observe 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 papersshields are properly installed.3. After servicing, make 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 integratedcircuits 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 assembly, drainoff 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 toapplying power to the unit under test.2. After removing an electrical assembly 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 removal 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 ESdevices.6. Do not remove a replacement ES device from its protective package until immediately before you areready 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 device, touchthe protective material to the chassis or circuit assembly into which the device will be installed.CautionBe 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. (Otherwise harmless motionsuch as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor cangenerate static electricity(ESD).COPYRIGHT NOTICE. 2005 Audio Partnership PLC. All rights reserved. Cambridge Audio is a registered trademarks of Audio Partnership PLC. This 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 document is provided solely for the use of official service agents in repairing and servicing Audio Partnership PLC products.Cambridge Audio DVD79 DVD PlayerSafety Precautions3Cambridge Audio DVD79 DVD PlayerFront Panel / Remote ControlButton Locations & Explanations FRONT PANEL CONTROLSPOWERPOWERPower switchO Op pe en/Cn/Cl lo os se eAllows you to open and close the disc tray to load a disc. The disc willbegin loading when the tray is closed. Pressing Play will also close thetray and start the Disc.P Pla lay/Py/Pausause ePlays the disc and pauses play.StSto op pStops the Disc playing. If Play is pressed shortly afterwards, the DVD willresume play in the place where it was stopped. A Compact disc will stopand a message will appear on screen. Press PLAY to continue.SkSki ip/Scap/Scan nAllows for skipping between the chapters on the DVD disc or tracks on aCD.1 12 23 34 45 56 67 78 89 91 10 01 14 41 15 51 16 61 17 71 18 81 19 92 20 02 21 12 22 22 23 31. Eject2. Number buttons3. Zoom 4. Angle5. Menu6. Return7. Volume8. Mute9. Clear10. A-B Button11. Skip Fwd12. Skip Back13. OSD14. PAL/NTSC15. Standby16. Audio17. Subtitle18. Title19. Select20. Setup21. Play/Stop/Pause22. Slow23. Mode24. PSM25. Repeat26. Scan Prev27. Scan Rev28. I-Scan29. P-Scan1 11 11 12 2USING THE REMOTE HANDSETWhen you have unpacked your remote handset, insert the supplied AAAbatteries to activate it. The remote can control all of the standardplayback options but is also important in setting up your DVD player asmany of the menus are most easily accessed from the remote. 1 13 32 24 42 25 52 26 62 27 72 28 82 29 9486-756-8687998Cambridge Audio DVD79 DVD PlayerPrevention of Static Electricity DischargeThe laser diode in the traverse unit (optical pickup) may break down due to static electricity of clothes or humanbody. 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 will be damaged 1. Worktable groundingPut a conductive material sheet on the area where the optical pickup is placed, and ground thesheet.Use the anti-static wrist strap to discharge the static electricity from your body.2. Human body grounding3. Handling of optical pickup3.1. To keep the good quality of the optical pickup maintenance parts during transportation and beforeinstallation, 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 tester to check the laser diode for the optical pickup .This will damage the laserdiode 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 structure.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, removethe short pin for preventingstatic electricity and install a new unit. Connect the connector as quickley aspossible.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)5Cambridge Audio DVD79 DVD Player686-756-8687998Cambridge Audio DVD79 DVD PlayerBracket Exploded View and Parts List 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. screw 12. screw 25.tray 13. Big bracket 7Cambridge Audio DVD79 DVD PlayerProtection 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 grounded,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 containing 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.Otherwise,the motor may no longer run.8Cambridge Audio DVD79 DVD PlayerVideo 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 terminal and terminate at 75 ohm.2.Confirm that luminance signal(Y+S)level is 1000mVp-p30mVMeasurement point Video output terminalColor bar 75%PLAY(Title 46):DVDT-S15PLAY(Title 12):DVDT-S01DVDT-S15orDVDT-S01ModeDiscMeasuring equipment,tools200mV/dir,10sec/dir1000mVp-p30mVConfirmation value (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-p30mVMeasurement point Video output terminalColor bar 75%PLAY(Title 46):DVDT-S15PLAY(Title 12):DVDT-S01DVDT-S15orDVDT-S01ModeDiscMeasuring equipment,toolsConfirmation valueScrewdriver,Oscilloscope200mV/dir,10sec/dir621mVp-p30mV9 1 5 51 5 01 4 51 4 01 3 51 3 01 2 51 2 0 1 1 51 1 01 0 5151 01 52 02 53 03 54 04 55 05 56 56 01 0 09 59 08 58 07 57 02 0 51 9 52 0 01 6 01 6 51 7 01 7 51 8 01 8 51 9 0HSYNC1_PORT1VDD1B/Cb/D1_0VSSIN_CLK1_PORT1FIELD ID1_PORT1VSYNC1_PORT1HSYNC2_PORT1IN_CLK2_PORT1FIELD ID2_PORT1VSYNC2_PORT1B/Cb/D1_6B/Cb/D1_5B/Cb/D1_4B/Cb/D1_3B/Cb/D1_2B/Cb/D1_1B/Cb/D1_7VDDcore1VSScoreR/Cr/Cb Cr_0R/Cr/Cb Cr_6R/Cr/Cb Cr_5R/Cr/Cb Cr_4R/Cr/Cb Cr_3R/Cr/Cb Cr_2R/Cr/Cb Cr_1R/Cr/Cb Cr_7VDD2VSSG/Y/Y_0G/Y/Y_1G/Y/Y_6G/Y/Y_5G/Y/Y_4G/Y/Y_3G/Y/Y_2G/Y/Y_7VDDcore2VSScoreIN_SELTESTDEV_ADDR1DEV_ADDR0SCLKSDATARESET_NVDD3VSSSDRAM DATA(0)SDRAM DATA(2)SDRAM DATA(1)SDRAM DATA(3)SDRAM 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)VDD4VSSVDDcore3VSScoreSDRAM DATA(20)SDRAM DATA(19)SDRAM DATA(18)SDRAM DATA(31)SDRAM DATA(30)SDRAM 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)VDDcore4VSScoreVSSVDD5TEST INSDRAM ADDR(10)SDRAM ADDR(5)SDRAM ADDR(4)SDRAM ADDR(3)SDRAM ADDR(6)SDRAM ADDR(7)SDRAM ADDR(8)SDRAM ADDR(9)VDDcore5VSScoreSDRAM ADDR(0)SDRAM ADDR(1)SDRAM ADDR(2)SDRAM WENB/U/Pb_OUT_7VDDcore7VSScoreR/V/Pr_OUT_7VDD8VSSG/Y/Y_OUT_7G/Y/Y_OUT_1G/Y/Y_OUT_2G/Y/Y_OUT_3G/Y/Y_OUT_4G/Y/Y_OUT_5G/Y/Y_OUT_6G/Y/Y_OUT_0R/V/Pr_OUT_0R/V/Pr_OUT_1R/V/Pr_OUT_2R/V/Pr_OUT_3R/V/Pr_OUT_4R/V/Pr_OUT_5R/V/Pr_OUT_6B/U/Pb_OUT_0B/U/Pb_OUT_1B/U/Pb_OUT_2B/U/Pb_OUT_3B/U/Pb_OUT_4B/U/Pb_OUT_5B/U/Pb_OUT_6VSSVDD7CLKOUTVSScoreVDDcore6TEST OUT1CTLOUT4CTLOUT0CTLOUT1CTLOUT2CTLOUT3TEST OUT0TEST3SDRAM CLKINSDRAM CLKOUTVSSVDD6SDRAM DQMSDRAM CASNSDRAM BA1SDRAM BA0SDRAM CSNSDRAM RASNOEPLL_PVDDPLL_PVSSAVSS_PLL_BE1AVDD_PLL_BE1AVSS_PLL_SDIAVSS_PLL_FEAVSS_PLL_BE2AVDD_PLL_FEAVDD_PLL_SDIAVDD_PLL_BE2DAC_PVSSDAC_VDDDAC_VSSDAC_B_OUTDAC_G_OUTDAC_R_OUTDAC_AVDDBDAC_AVDDRDAC_AVDDGDAC_AVSSBDAC_AVSSRDAC_AVSSGDAC_COMPDAC_RSETDAC_VREFOUTDAC_VREFINDAC_AVDDDAC_AVSSDAC_GR_AVSSDAC_GR_AVDDDAC_PVDDTEST0TEST1TEST2XTAL INXTAL OUTVDD9VSSHSYNC_PORT2IN_CLK_PORT2FIELD ID_PORT2VSYNC_PORT2VSScoreVDDcore8D1_IN_0D1_IN_7D1_IN_6D1_IN_5D1_IN_4D1_IN_3D1_IN_2D1_IN_1 Cambridge Audio DVD79 DVD Player(U201) Pin Diagram10Pin No Pin Name I/O Type Voltage ToleranceDrive Internal Pull up/ PulldownDescription 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_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 CTL2 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 input (Blue/Cb/D1) 21 R/Cr/Cb Cr_0 Input 5v Port 1 Digital video input (Red/Cr/CrCb) 22 R/Cr/Cb Cr_1 Input 5v Port 1 Digital video input (Red/Cr/CrCb) 23 R/Cr/Cb Cr_2 Input 5v Port 1 Digital video input (Red/Cr/CrCb) 24 R/Cr/Cb Cr_3 Input 5v Port 1 Digital video input (Red/Cr/CrCb) 25 R/Cr/Cb Cr_4 Input 5v Port 1 Digital video input (Red/Cr/CrCb) 26 R/Cr/Cb Cr_5 Input 5v Port 1 Digital video input (Red/Cr/CrCb) 27 R/Cr/Cb Cr_6 Input 5v Port 1 Digital video input (Red/Cr/CrCb) 28 R/Cr/Cb Cr_7 Input 5v Port 1 Digital video input (Red/Cr/CrCb) 29 G/Y/Y_0 Input 5v Port 1 Digital video input (Green/Y) 30 VDD2 Power 3.3 V - Power pin for IO 31 VSS Ground Ground 32 G/Y/Y_1 Input 5v Port 1 Digital video input (Green/Y) 33 G/Y/Y_2 Input 5v Port 1 Digital video input (Green/Y) 34 G/Y/Y_3 Input 5v Port 1 Digital video input (Green/Y) 35 G/Y/Y_4 Input 5v Port 1 Digital video input (Green/Y) 36 VDDcore2 Power 1.8 V - Power pin for core 37 VSScore Ground Ground 38 G/Y/Y_5 Input 5v Port 1 Digital video input (Green/Y) 39 G/Y/Y_6 Input 5v Port 1 Digital video input (Green/Y) 40 G/Y/Y_7 Input 5