Cambridge-DVD89-dvd-sm维修电路原理图.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 DVD89 Issue Date: 27th February 2006 SERVICE MANUAL SPECIFICATIONS: Disc Types DVD, DVD-A, DVD-V, CD-RW CD-R, CD-DA, DIVX, SACD Audio Formats 5.1 and Stereo Downmix LPCM 16 bit 44.1kHz Dolby Digital 5.1 2

2、4 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 & HDMI Component (YCbCr) PAL/NTSC Interlaced / Progressive Scan THD (unweighed) 100dB Frequency Response 20Hz 20kHz Video Amplitude

3、 1.0V pk-pk (75 ohms) S-Video Amplitude Y:1.0V pk-pk n (75ohms) 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) 2.56 kg AP19841/1 RadioFans.CN 收音机爱 好者资料库 DVD89 SERVICE MANUAL TABLE OF CONTENTS Safety Precautions

4、 3 Front Panel Illustration 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 HY57V641620HG Pin Configuration & Description (U211) 10 HY57

5、V641620HG Functional Block Diagram (U211) 11 MT1392 Pin Definitions (U203) 12/13/14 MT1392 System Configuration & Functional Block (U201) 15 MT1392 Functions (U201) 16 MT1392 Pinout Diagram (U201) 17 MT1389 Pinout Diagram (U201) 18 MT1389 Block Diagram (U201) 19 MT1389 Pin Function (RF Interface) (U

6、201) 20 MT1389 Pin Function (Analog Monitor Output) (U201) 21 MT1389 Pin Function (General Power / Ground, Micro Controller & Flash Interface) (U201) 22 MT1389 Pin Function (Micro Controller & Flash Interface) (U201) 23 MT1389 Pin Function (Audio Interface) (U201) 24 MT1389 Pin Function (Video Inter

7、face) (U201) 25 MT1389 Pin Function (DRAM Interface) (U201) 26/27 MT1389 Pin Function (DRAM Interface & JTAG Interface) (U201) 28 Front Panel & VFD Schematic 29 Front Panel & VFD Board Layout 30 Power Supply Schematic 31 Power Supply PCB Layout 32 Main PCB Board (Main Processor) 33 Main PCB Board (M

8、emory, Reset & Main Clock) 34 Main PCB Board (Audio DACS, Output Filters & Mute) 35 Main PCB Board (DVI & HDMI) 36 Main PCB Board (Video Outputs) 37 Main PCB Board Layout 38 Power Board Parts List 39 Main Panel Parts List 40 Decode Board Parts List 41/42 Serviceable Parts List 43 RadioFans.CN 收音机爱 好

9、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 papers shields are properly install

10、ed. 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 t

11、ypical ES devices are integrated 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

12、or semiconductor-equipped assembly, 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 remov

13、ing 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 remo

14、val 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 ES devices. 6. Do not remove a replacement ES devic

15、e from its protective package 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

16、leads of a replacement ES device, 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 rep

17、lacement ES devices. (Otherwise 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 o

18、f 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. Inform

19、ation provided in this document is provided solely for the use of official service agents in repairing and servicing Audio Partnership PLC products. Cambridge Audio DVD89 DVD Player Safety Precautions Cambridge Audio DVD89 DVD Player Front Panel Illustration POWER switch 6 5 STOP button PLAY/PAUSE b

20、utton Skip/Scan button 4 2 3 Display window 7 Disc tray OPEN/CLOSE button 5 2 3 76 4 86-756-8687998 Cambridge Audio DVD89 DVD Player Prevention of Static Electricity Discharge The laser diode in the traverse unit (optical pickup) may break down due to static electricity of clothes or human body. Use

21、 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 2. Worktable grounding Put a conductive material sheet on the area where the optical pickup is placed, an

22、d ground the sheet. Use the anti-static wrist strap to discharge the static electricity from your body. 3. Human body grounding 4. Handling of optical pickup 5. To keep the good quality of the optical pickup maintenance parts during transportation and before installation, the both ends of the laser

23、diode are short-circuited.After replacing the parts with new ones, remove the short circuit according to the correct procedure. (See this Technical Guide). 6. Do not use a tester to check the laser diode for the optical pickup .This will damage the laser diode due to the power supply in the tester.

24、7. Handling precautions for Traverse Unit (Optical Pickup) 8. Do not give a considerable shock to the traverse unit(optical pickup)as it has an extremely high-precise structure. 9. When replacing the optical pickup, install the flexible cable and cut is short land with a nipper. See the optical pick

25、up replacement procedure in this Technical Guide. Before replacing the traverse unit, remove the short pin for preventingstatic electricity and install a new unit. Connect the connector as quickley as possible. 10. The flexible cable may be cut off if an excessive force is applied to it. Use caution

26、 when handling the cable. 11. The half-fixed resistor for laser power adjustment cannot be adjusted. Do not turn the resistor. safety_3 (1577x409x2 tiff) 1. Grounding for electrostatic breakdown prevention Some devices such as the DVD player use the optical pickup (laser diode) and the optical picku

27、p will be damaged by ststic electricity in the working enviroment. Proceed servicing works under the working enviroment where grounding works is completed. Cambridge Audio DVD89 DVD Player Mechanism Unit Exploded Diagram Cambridge Audio DVD89 DVD Player Bracket Exploded View and Parts List 1) Bracke

28、t 2) Belt 3) Screw 4) Belt Wheel 5) Gear Wheel 6) Iron Chip 7) Immobility Mechanism Equipment 8) Magnet 9) Platen 10) Bridge Bracket 11) Screw 12) Screw 13) Big Bracket 14) Front Silicon Rubber 15) Back Silicon Rubber 16) Pick Up 17) Pick Up 18) Switch 19) Five Pin Flat Plug 20) Screw 21) PCB 22) Mo

29、tor 23) Moto Wheel 24) Screw 25) Tray 86-756-8687998 Cambridge Audio DVD89 DVD Player Protection of the Laser Diode Laser Diode Protection Shorts (Replacement Parts) Cautions on assembly and adjustment Make sure that the workbenches, jigs, tips, tips of soldering irons and measuring instruments are

30、grounded, For replacement optical pickups open the LD short lands quickly with a soldering iron after 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,cy

31、an, 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. and that personnel wear wrist straps for ground. circuit is connected. 86-756-8687998 Cambridge Audio DVD8

32、9 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 terminal and terminate at 75 ohm. 2.Confirm that luminan

33、ce 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 ModeDisc Measuring equipment,tools 200mV/dir,10sec/dir1000mVp-p30mV Confirmation value (Chrominance Signal) Purpose:To maintain video signal output compatibility

34、. 1.Connect the oscilloscope to the video output terminal and terminate at 75 ohm. 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 PLAY(Title 12):DVDT-S01 ModeDisc Measuring equipment,toolsConfirmation value

35、 Screwdriver,Oscilloscope 200mV/dir,10sec/dir621mVp-p30mV Cambridge Audio DVD89 DVD Player (U211) HY57V641620HG Pin Configuration & Description PIN CONFIGURATION PIN DESCRIPTION PINPIN NAMEDESCRIPTION CLKClock The system clock input. All other inputs are registered to the SDRAM on the rising edge of

36、 CLK CKEClock Enable Controls internal clock signal and when deactivated, the SDRAM will be one of the states among power down, suspend or self refresh CSChip SelectEnables or disables all inputs except CLK, CKE and DQM BA0,BA1 Bank Address Selects bank to be activated during RAS activity Selects ba

37、nk to be read/written during CAS activity A0 A11Address Row Address : RA0 RA11, Column Address : CA0 CA7 Auto-precharge flag : A10 RAS, CAS, WE Row Address Strobe, Column Address Strobe, Write Enable RAS, CAS and WE define the operation Refer function truth table for details LDQM, UDQMData Input/Out

38、put MaskControls output buffers in read mode and masks input data in write mode DQ0 DQ15Data Input/OutputMultiplexed data input / output pin VDD/VSSPower Supply/GroundPower supply for internal circuits and input buffers VDDQ/VSSQData Output Power/GroundPower supply for output buffers NCNo Connection

39、No connection VSS DQ15 VSSQ DQ14 DQ13 VDDQ DQ12 DQ11 VSSQ DQ10 DQ9 VDDQ DQ8 VSS NC UDQM CLK CKE NC A11 A9 A8 A7 A6 A5 A4 VSS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 VDD DQ0 VDDQ DQ1 DQ2 V

40、SSQ DQ3 DQ4 VDDQ DQ5 DQ6 VSSQ DQ7 VDD LDQM /WE /CAS /RAS /CS BA0 BA1 A10/AP A0 A1 A2 A3 VDD 54pin TSOP II 400mil x 875mil 0.8mm pin pitch Cambridge Audio DVD89 DVD Player (U211) HY57V641620HG Functional Block Diagram 1Mbit x 4banks x 16 I/O Synchronous DRAM X decoders State Machine A0 A1 A11 BA0 BA1

41、 Address buffers Address Registers Mode Registers Row Pre Decoders Column Pre Decoders Column Add Counter Row active Column Active Burst Counter Data Out Control CAS Latency Internal Row counter DQ0 DQ1 DQ14 DQ15 refresh Self refresh logic & timer Pipe Line Control I/O Buffer & Logic Bank Select Sen

42、se AMP & I/O Gate CLK CKE CS RAS CAS WE UDQM LDQM 1Mx16 Bank 3 X decoders X decoders Memory Cell Array Y decoders X decoders 1Mx16 Bank 0 1Mx16 Bank 1 1Mx16 Bank 2 Cambridge Audio DVD89 DVD Player (U203) MT1392 Pin Definitions Pin number Symbol Type Description 1 DVSS GND Digital ground 2-9 C0-C7 I,

43、 PD Normal : Digital chroma input VDAC test : DAC test mode 0:7 input. BIST mode : BIST data input 10 DVDD33 VDD Digital power, 3.3V 11 VCK I Clock of digital video input 12 DVSS GND Digital ground 13-20 Y0-Y7 I, PD Normal : Digital luma input VDAC test : DAC test data 0:7 input. BIST mode : BIST ad

44、dress input 21 SSCK I Normal : Slave serial interface clock input SCAN mode : scan reset, active low 22 SSD IO Slave serial interface data input/output 23 DVDD18 VDD Power of digital core, 1.8V 24 PWDN# I, PU Power down, actiev low 25 RST# I, PU Reset, active low 26 XTAL I Normal : clock input 27 IN

45、T O 28 DVSS GND Digital ground 29 A7/GPO0 IO,PD 30 A6/GPO1 31 TRAP2/GP02 0 1 1 BIST 34 MSCK/GPO5 O MasterI2C on : Master serial interface clock output BIST mode : SRAM fail output Normal : General purpose output VDAC test: VDAC test clock imput Interrupt output Power On: Serial interface address 7 B

46、IST mode : SRAM fail output Normal : General purpose output IO,PD Power On: Serial interface address 6 BIST mode : SRAM fail output Normal : General purpose output IO,PD Power On: Hardware trap bit 2 BIST mode : SRAM fail output Normal : General purpose output TRAP1/GP03 IO,PD Power On: Hardware tra

47、p bit 1 BIST mode : SRAM fail output Normal : General purpose output TRAP0/GP04IO,PD Power On: Hardware trap bit 0 BIST mode : SRAM fail output Normal : General purpose output Trap Mode bit 2 1 0 0 0 0 Normal, with master 12C disable 1 A1 A0 Normal, with master 12C enable A(1:0) : EEPROM device addr

48、ess select 0 0 1 Test scan mode 0 1 0 VDAC test mode mode Cambridge Audio DVD89 DVD Player (U203) MT1392 Pin Definitions Pin number Symbol Type Description MSD/GPO6 IO,PU MasterI2C on : Master serial interface data input/output BIST mode : SRAM fail output Normal : General purpose output 36 GPO7 IO,PD PowerON : EPROM word-address type. 1 : 16bit , 0 : 8bit BIST mode : SRAM fail output Normal