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BBK DK1020S Service Manual

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Summary of Contents for BBK DK1020S

  • Page 1 DK1020S service manual first draft...

  • Page 2: Table Of Contents

    Catalog Chapter One About Maintenance 1.1 Safety precautions 1.1.1 Power supply 1.1.2 Precautions for antistatic 1.1.3 Precautions for laser head 1.1.4 About placement position 1.2 Maintenance method 1.2.1 Visualized method 1.2.2 Electric resistance method 1.2.3 Voltage method 1.2.4 Current method 1.2.5 Cutting method 1.2.6 Element substitution method 1.2.7 Comparison method...
  • Page 3 3.2.8 Main axis braking control circuit 3.2.9 Control panel components 3.2.10 Video circuit 3.2.11 Input/output circuit 3.2.12 Tuner Section Three DK1020S Audio Power Amplifying Circuit Principle and Servicing 3.3.1 Audio Power amplifying circuit block diagram 3.3.2 Output circuit block diagram 3.3.3 Unit circuit block diagram...
  • Page 4 3.3.4 Audio signal waveform Section Four Introduction to IC 3.4.1 Function introduction to Mt1389 3.4.2 Function introduction to SDRAM 3.4.3 Function introduction to FLASH 3.4.4 Function introduction to D5954 3.4.5 Function introduction to 24LLC020 3.4.6 Function introduction to 74HCT125 3.4.7 Function introduction to CD4052 3.4.8 Function introduction to SAA6588 3.4.9 Function introduction to CS5340 3.4.10 Function introduction to 4558/4580...
  • Page 5 Appendix One Signal Waveform Illustration Appendix Two Key Point Voltage Chapter Four Disassembly and Assembly Process 4.1 The unit 4.1.1 Disassembly process for the unit 4.1.2 Assembly process for the unit 4.2 Loader 4.2.1 Disassembly process for loader 4.2.2 Assembly process for loader 4.2.3 Disassembly and assembly process if "Disc tray not eject”...
  • Page 6 5.2.7 keyscan 1 board 5.2.8 keyscan 2 board 5.2.9 power board Chapter six bom list 6.1 power board 6.2 earphone board 6.3 amplifier board 6.4 decode board 6.5 surface control board 6.6 input output board 6.8 remote control...

  • Page 7: Chapter One About Maintenance

    Chapter One About Maintenance 1.1 Safety precautions 1.1.1Power supply Whenmaintenancepersonnel arerepairingDVD players,heshouldpayspecialattentionto powerboardwith220VACand330VDCwhichwillcausehurtanddamage topersons! 1.1.2Precautionsforantistatic Movementandfriction willbothbringstatic electricitywhichcauses seriousdamagesto integrated IC. Though static charge is little, when a limited quantity of electriccharge is added to large-scale integratedIC,asthecapacitanceisverysmallinthemeantime,nowtheintegratedICisverymucheasy to be struck through by static electricity or the performance will decrease. Thus static electricity prevention is of extraordinary importance.

  • Page 8: About Placement Position

    1.1.4Aboutplacementposition 1.NeverplaceDVDplayerinpositionswithhightemperatureandhumidity. 2.Avoidplacingnearhighmagneticfields,suchasloudspeakerormagnet. 3.Positionsforplacementshouldbe stable andsecure. 1.2 Maintenance m ethod 1.2.1Visualizedmethod Directlyviewwhether abnormalities ofcollision, lack of element,jointwelding, shedding welding, rosin joint, copper foil turning up, lead wiredisconnection and elements burning u p among pins of elementsappear.Checkpowersupplyofthemachineandthenusehandstotouchthecasingofpartof elementsandcheckwhetherthey arehottojudgethetroublespot.Youshouldpaymoreattention when usingthismethodtocheckinhighvoltageparts. 1.2.2Electricresistancemethod Set themultimeterinresistancepositionandtest whetherthenumericalvalueofresistanceof each pointin the circuithasdifference from thenormal value to judgethetroublespot.

  • Page 9: Element Substitution Method

    1.2.6Elementsubstitutionmethod Whensomeelementscannotbejudgedgoodorbad,substitutionmethod maydeadopteddirectly. 1.2.7 Comparisonmethod A same g o o d P C b o a r d i s u s u a l l y usedto testthecorrectvoltageandwaveform.Compared these data withthose testedthroughfaultPC board, the cause of troubles m a y b e found.Through the above maintenance method, theoreticalknowledge andmaintenance e xperience, a ll difficulties and troubles willbereadily solved.

  • Page 10: Chapter Two Functionsandoperationinstructions

    Chapter Two FunctionsandOperationInstructions 2.1Features Thisplayerhasemployedthe newgenerationDVDdecodechipwith built-in Dolby Digitaldecoder and whichwill bringyoutoa brand-newAVentertainmentworld.The2-lasersupererror-correction mechanismsupportsCD-R/CD-RW. 2.1.1 Brand-newAVEffects 1.Progressive-scanvideooutputsto eliminatetheflickershardlyovercome byinterlacingscan and thereforeyoureyesightwillbewell-protected.Atthe sametime,thepicturesdefinitionissharply enhancedand thepictures willbe finer, smootherand stabler. 2.Channelaudio poweramplifieroutput. 3.Compositevideo,S-Video, Component videooutputs. 4.Built-in Dolby Digital decoder. 5.Dolbyoutputfor2channel(DOWNMIX). 6.Digitalkaraokeenablessingingeasier 7.DVD-Audiodecoding outputtoreproduceorigtnalandrealisticsoundeffects 8.CompatiblewithDIVXMPEG4discstoproducewonderfulpictures 2.1.2 HighQualityDigitalAudio 1.Optical andcoaxialoutputs forDigital/DTSaudio.

  • Page 11: Super Compatibilitywith

    7. MultipleaspectratiostofitTVsetsofvariousscreen ratios. 8. Parentallock functiontopreventchildrenfrom watchingunsuitablediscs. 9. Multipledubbinglanguagesandsubtitlelanguagesbringyouthebestentertainment status all t h e time. 10.FM/AMradiotuningfunction 11.AUXaudioamplifyingfunctiontosatisfyyourdemands. 12.Sleeptimer function. 2.1.4 Super CompatibilitywithSVCD,VCD,CD,MP3,HDCD,KODAK PICTURECKetc. NOTE:DivXversionis stillupgradngcontinuouslyandthelatestversionofthisunitisDivX5.1.Some discsimcompatble.Pleasetakecarewhenbuyingdiscs. 2.2 ControlButtonLocations and Explanations 2.2.1 Rear PanelIllustration Ａ Ｕ Ｘ Ｉ ＮＭ Ｉ Ｘ Ｏ Ｕ Ｔ Ｖ...

  • Page 12: 3Vfddisplaywindowillustration

    Ｐ Ｏ Ｗ Ｅ Ｒ ｓ ｗ ｉ ｔ ｃ ｈ Ｄ Ｖ Ｄ ｍｏ ｄｅ： ｎｅｘｔ ｂｕｔｔｏｎ Ｐ Ｌ Ａ Ｙ ／ Ｐ Ａ Ｕ Ｓ Ｅ ｂ ｕ ｔ ｔ ｏ ｎ Ｔ ｕ ｎ ｅ ｒ ｍ ｏ ｄ ｅ ： ｐ ｒ ｅ ｓ ｅ ｔ ＂ ＋ ＂ Ｄ...

  • Page 13: 5Accessories

    Ｓ Ｌ Ｅ Ｅ Ｐ ｂｕｔｔｏｎ ＴＵＮＩＮＧ＋／－ｂｕｔｔｏｎｓ Ｓ ｌ ｅ ｅ ｐ ｔ ｉ ｍ ｅ ｒ Ｔ ｕ ｎ ｉ ｎ ｇ ｕ ｐ ／ ｄ ｏ ｗ ｎ ｓｔａｔｉｏｎｓ Ｖ Ｏ Ｃ Ａ Ｌ Ｂｕｔｔｏｎ Ｑ － Ｐ Ｌ Ａ Ｙ Ｂ ｕ ｔ ｔ ｏ ｎ Ｓ...

  • Page 14: Commonsetup

    3.TVType:Thisitemisusedtosetthevideo Ｃ ｏ ｍ ｍ ｏ ｎ Ｓ ｅ ｔ ｕ ｐ Ｐ ａ ｇ ｅ Ｐ ｒ ｏ ｌ ｏ ｇ ｉ ｃ Ｉ Ｉ Ｌｏｇｏ Ｔｙｐｅ outputsystem ofthis unit. Ｔ ｖ ｔ ｙ ｐ ｅ ＡＵＴＯ Ｌ Ｅ Ｄ Ｃ ｏ ｎ ｔ ｒ ｏ ｌ ＰＡＬ...

  • Page 15: General Settings

    4 PressUP/DOWNarrowtoselectthedesired 3.ScreenSaver:Open orclwsethescreen saver function. value.PressSELECT toconfirmit. ◆ Optionalsettins:OFF,ON. Forexample:PressUP/DOWNarrowtoselect ◆ “ ” Default:ON. Medium ,thenpressselect,the TVscreen 4.VideoOutput:Toset thetypesoftheSCART display: outconncctor. ◆ Optionalsettins:YCbCr,RGB. ◆ Default:YCbCr. ◆ WhenusingRGBoutputsfromtheSCART interface,PleaseseletRGB.oHTERWISE, 5.PressSETUP toexit thesetupmenu. PLEASESELECTYCbCr. 5.LogoType:Thisitem isusedtisetupthe sort of Power-inLogo. O ptionalsettings:Default,Captured. 2.3.4 General Settings Default:Default NOTE:...

  • Page 16: 6Audiosetup

    ◆ SoundFieldisvoidwhenplaying DVDAUDIO NOTES discs. ’ The 5.1CH mode needs disc ssupport.The 3.SPDIFOutput:Toset thebitstreamtype ofthe numberof actual output channelsdepends on digitaloutput. theplayed disc. ◆ Optionalsettings:SPDIF/RAW,SPDIF/PCM. ◆ Default:SPDIF/RAW. 4.LPCMOut:To settheoutputfrequencyofthe 96KLPCMaudiodatatofit fordifferentpower 2.ChannelDelay:Tosetdelay timeofthe amplifiers. Center/Surround/SubwooferSpeaker. ◆ Optionalsettins:48K,96K,192K. A.PressUP/DOWNnavigationkeys toselectthe ◆ Default:48K.

  • Page 17: Video Setup

    PROLOGICmodevirtualizesPROLOGICI — — DolbyDigitalSetup — — (utilizingPRO Logic II).TheAUTOmode DualMono Stereo Dynamic means a m odeisselected automatically accordingto thedisc. ◆ Optionalsettings: Stereo,L-Mono,R-Mono, ◆ Optionalsettings:MUSIC, MOVIE,PRO Logic, Mix-Mono. AUTO. ◆ Default:Stereo ◆ Default: MUSIC. Dynamic ompression:Tosetthelinear C. Panorama:To setthepanoramamodetoON compression ratio toget different orOFF.Thismodeis toextendthefront stereo compression result.

  • Page 18: Initial Setup

    ◆ Audio/subtitle/discmenulanguagesare arrow toreturnto thevideosetupmenu. effectivetoDVDonly. 6 Gammaemendation:Thisitem is usedtosetup ◆ Ifthediscdoesnotrecordyourdesired theGammavalueofvideooutput.Selectable language,the player willselectthedisc- setupvalues:High,Medium,Low,Off. specifiedlanguages toplay. Default:Off ◆ Selectingotherlanguages: Press UP/DOWN 2.3.8 Initial Setup ARROW tomovethecursortoOTHERitem, — — Ｐ ｒ ｅ ｆ ｅ ｒ ｅ ｎ ｃ ｅ Ｐ ａ ｇ ｅ — — pressSELECT.PressNUMBERbuttons to Ｔ...

  • Page 19: Useful Notes

    2.3.9 Useful notes ◆ Inorder toprolongtheservicelifeofyourplayer,itis recommendedtowaitatLeast30 seconds beforeyouturnitonAgain afterswitchingitoff. ◆ Turnoff power afteroperation. ◆ Onlyusethepowersupply ofthenominalvoltage,otherwise theplayerwillnot beoperationaloreven bedamaged. ◆ Somefunctionsoftheplayermay notbe applicableto some discs. ◆ Incase ofoccasionalplayerhalt, please turnit offand turnitonagain. ◆ ThisplayercannotplaysomeSVCDdiscswith theCVDformat. ◆ Tocancelbasseffects,you maydisconnectthesubwooferspeaker. ◆ Alltheaudioouputsignalmaybe coveredbynoiseif themachine suffers great disturbance, butitwill justrecoverby switchingon again.

  • Page 20: Speaker Systemconnections

    ◆ Designandspecificationsare subjecttochange withoutnotice. ◆ We donotguaranteethatalldiscscanbe played smoothlyduetothe discquality, discrecording qualityandrecordingformat. 2.4 Speaker SYSTEMconnectIONS AUXIN M I X O U T VIDEOOUT Cr/Pr Cb/Pb VIDEO COAXIAL OPTICAL S-VIDEO AUDIO VIDEO OPTICALOUT VIDEOOUT 2.4.1NOTE: ◆ Keepthe power cord u nplugged a n d s w i t c h power off before the s ystem connection, then c o n n e c t one endoftheaccessoryspeakercordto the terminal ofthe satellitespeakers,andthe other end to the outputjackfor5CHspeakerspower output on the rear p anel o f t h e d v d r e c e i v e r .

  • Page 21: 2Specifications

    2.4.2SPECIFICATIONS ◆ SubwooferUnit： ＂ Dynamic Paper ConeSpeaker Max.OutputPower: NominalImpedance： 6Ω 50Hz~250Hz FrequencyResponse： ◆ Satellite SpeakerUnit ： ＂ WooferSpeaker(Magnetic-shielded) Frontspeaker: ＂ /0.75 Tweeter speaker ＂ × 2WideFrequencyBand(Magnetic- Centrespeaker ： ＂ shielded)/0.75 Tweeterspeaker ＂ WideFrequencyBand Surroundspeaker： (Magnetic-shielded)ConeSpeaker Max.OutputPower: NominalImpedance： 4Ω FrequencyResponse： 200Hz~20000Hz ◆SubwooferSpeaker ×...

  • Page 22: Chapter Three Principle And Servicing

    - 16 -...

  • Page 34: Loader Signal Explanation

    DC Voltage Flow Pin Name Function Description Number Direction Read DVD Read CD No disc disc disc Input loader 2.52 2.34 0.46 Focus error signal is added to the two ends of pick-up focusing coil. Input loader 2.49 2.49 0.93 Input loader 2.53 2.51...

  • Page 35: Servo Circuit

    DC Voltage Flow Pin Name Function Description Number Direction Read DVD Read CD No disc disc disc Input 2.19 2.27 2.04 Disc data signal MT1389 Input 2.07 2.44 2.03 Auxiliary signal used for trace MT1389 Grounding 0.01 0.01 Grounding Input loader 2.04 2.06 2.03...
  • Page 37 When reading When no Name When disc out When disc in disc normally disc in There is about 1 second 3.3V TROPEN pulse when at the moment of disc There is about 1 second 3.3V pulse TRCLOSE when at the moment of disc out TROUT 3.41V 3.3V...
  • Page 41 Key point Position Voltage Remark TC217 may sends out current from this DV33 (point A) Diode VD201 cathode 3.3V point after power failure 3.3V after reset After reset finishes, voltage increases Point B Diode VD201 anode finishes from 0V to 3.3V After reset finishes, voltage decreases Point C Pin 5 of reverter...

  • Page 44: Control Panel Components

    Normal working voltage Voltage change when disc Key point Position out (V) Pin 11 of D5954, pin 5 of 3.79 3.79 0.70 1.80 XS303 Pin 12 of D5954, pin 6 of 1.38 1.38 3.40 1.80 XS303 Pin 36 of MT1389/B 1.38 1.38 3.10 1.80 Pin 35 of MT1389/A...
  • Page 46 DC voltage when no Signal Function Troubles disc in (V) S-video without picture/picture bright/picture Brightness of S-VIDEO 0.74 dark Chroma of S-VIDEO S-video without color/color distortion 1.48 Composite video without picture/picture VIDEO Component video composite signal 0.74 bright/picture dark Component video without picture/picture Component video brightness signal 0.76 bright/picture dark...
  • Page 47 Whether U201 (MT1389) power supply and crystal oscillator circuit is normal Check whether matching filter circuit has capacitance electric leakage or inductor circuit opening...

  • Page 52: Input/Output Circuit

    Externally inputted audio signal is sent to power amplifier board and decode board for processing also through AV board. DK1020S AV board video output (refer to 3.2.10) circuit includes composite video output terminal, S-video terminal and component video output terminal;...
  • Page 66 Data Name Function Remark direction voltage AGND Analog DVDA DVD-RF high frequency AC coupling signal A 1.72 Signals A, B, C and D from DVDB DVD-RF high frequency AC coupling signal B 1.72 loader are coupled by capacitor C201, C202, DVDC DVD-RF high frequency AC coupling signal C 1.72...
  • Page 67 Data Name Function Remark direction voltage DVD-RAM main beam RF DC signal input D DVD-RAM assistant beam RF DC signal input A DVD-RAM assistant beam RF DC signal input B 1.33 DVD-RAM assistant beam RF DC signal input C 1.35 unnsed DVD-RAM assistant beam RF DC signal input D 1.31...
  • Page 68 Data Name Function Remark direction voltage Trace control signal output 1.38 Focus control signal output 1.38 USB_VSS USB ground USBP USB data unused USBM USB data USB_VDD3 USB 3.3V power supply FG/ADIN8 Sensing signal input/AD universal input 2.69 Open-to-position checking signal input/AD TDI/ADIN4 universal input Open-to-position checking signal input/AD...
  • Page 69 Data Name Function Remark direction voltage HIGHA3 Microcontroller address bit 3 1.11 FLASH address signal DVDD3 Digital 3.3V power supply 3.24 HIGHA2 Microcontroller address bit 2 1.81 HIGHA1 Microcontroller address bit 1 1.55 FLASH address signal IOA20 Microcontroller address bit 20 Output PCE# signal and change into DCE# signal to IOCS...
  • Page 70 Data Name Function Remark direction voltage Panel communication- UP1_5 Microcontroller port enable UP1_6 Microcontroller port I2C clock UP1_7 Microcontroller port 3.22 I2C data Tuning signal after being UP3_0 Microcontroller port managed from SAA6588 UP3_1 Microcontroller port 0.68 UP3_4 Microcontroller port Serial communication port UP3_5 Microcontroller port...
  • Page 71 Data Name Function Remark direction voltage DRAM data 0.98 SDRAM data line DVSS Ground 0.01 DRAM data 0.67 SDRAM data line DQS1 DRAM input/output screen-shielded signal 3.24 DQM1 DRAM input/output screen-shielded signal Output WE# signal and change into DWE# to DRAM write enable 3.17 control the write of SDRAM...
  • Page 72 Data Name Function Remark direction voltage RA11 DRAM address 0.03 SDRAM address line DRAM address 0.07 DRAM address 0.04 DVSS Digital DRAM address SDRAM address line DVSS Digital DRAM address 1.44 SDRAM address line DRAM address 1.74 DRAM address 1.63 DVDD3 Digital 3.3V power supply 3.21...
  • Page 73 Data Name Function Remark direction voltage Whether headphone is RD22 DRAM data 0.01 inserted to detecting signal DVDD3 Digital 3.3V power supply 3.21 When selecting tuning RD21 DRAM data 0.02 function, open power supply loop of tuner. RD20 DRAM data 0.01 unused RD19...
  • Page 74 Data Name Function Remark direction voltage SPDATA 0.14 unused SPLRCK 3.78 unused SPBCK/ASD 3.86 unused ATA5 DVDD3 Digital 3.3V power supply 3.21 ALRCK Audio left/right channel clock 1.52 ABCK Audio bit clock ACLK Audio DAC external clock 1.59 DVSS Digital ASDATA0 Audio serial data 0.01...
  • Page 75 Data Name Function Remark direction voltage ADCVSS D/A conversion S_VREFP S_VREFN 0.03 RFVDD3 RF 3.3V power supply 3.22 RFRPDC DC RF error signal input 0.73 RFRPAC AC RF error signal input 1.37 HRFZC High frequency RF signal zero passage detect CRTPLP 1.53 RFGND...
  • Page 76 Data Voltage Data Voltage Name Function Name Function direction direction Data bus Clock enable signal 1.22 Data bus 0.45 System clock input 1.68 Data in/out screen- VSSQ Ground UDQM 2.42 shielded signal Data bus Blank pin 0.01 3.3V power supply 3.14 Ground 0.01...
  • Page 77 Voltage Data Name Function (when no direction disc) Output enable signal , low level is effective DQ0- 29-3 6 38-44 15 bit data bus DQ14 5V power supply Take word extend mode as data line, and bit extend mode as DQ15/A-1 address line Select 8-bit or 16-bit output mode.
  • Page 78 Voltage when DVD disc CD disc Name Function no disc (V) voltage (V) voltage (V) PVCC2 5V power supply 5.38 5.08 5.07 PREGND Ground 0.01 0.01 VINLD Feed control signal input 1.41 CTK2 External feedback loop 2.41 2.52 2.53 CTK1 External feedback loop 2.51 2.52...
  • Page 81 Function Remark Internal signal Disc signal, MIC signal 1 3.3V 1 3.3V External signal Tuner, external input unused unused Name Function Data direction 1, 2, 4, 5 Y0-Y3 Y signal input 11, 12, 14, 15 X0-X3 X signal input 3, 13 Y signal output Two groups both have no output when forbidden end his high level...
  • Page 82 Data Data Pin Name Function Remark Pin Name Function Remark direction direction Multi-path rectifier output unused 11 PSWN Pause switch output unused MPTH Multi-path detector output unused 12 Attached address input Ground TCON Detect control signal Ground 13 AFIN Audio signal input unused Analog power supply OSCO...
  • Page 84 Name Data direction Function VRA-PLL Reference voltage of PLL analog power supply 1.8V PLL-FLT-RET.PLL external filtering loop PLL-FLTM PLL negative input PLL-FLTP PLL positive input AVSS Analog ground AVSS Analog ground VRD-PLL Reference voltage of PLL digital power supply 1.8V AVSS-PLL PLL analog ground AVDD-PLL...
  • Page 85 Name Data direction Function SCLK Series audio control clock SDIN4 Left/right channel audio data input SDIN3 Surround left/right channel audio data input SDIN2 Microphone/external left/right channel audio data input SDIN1 Centre/subwoofer audio data input PSVC Power supply controlled by bandwidth modulation volume VR-DIG Reference voltage of digital kernel power supply 1.8V DVSS...
  • Page 87 Name Data direction Function Remark PWM-AM Subwoofer PWM positive signal input PWM-AP Subwoofer PWM negative signal input Common DGND Digital input/output reference ground Common DVDD Input/output power supply voltage 3.3V GREG Door drive voltage regulator decoupling pin Common Common Common GVDD Door drive and digital regulator power supply end BST-A...
  • Page 88 Name Data direction Function Remark PVDD-D Surround left channel power supply BST-D HS bootstrap supply (BST) GVDD Door drive and digital regulator power supply end Common Name Data direction Function Remark Common Common GREG Door drive voltage regulator decoupling pin Chip over heat alarm output SD-CD Off label position of centre power amplifier...
  • Page 89 Name Data direction Function Remark DVDD Input.output power supply voltage 3.3V GREG Door drive voltage regulator decoupling pin Common Common Common GVDD Door drive and digital regulator power supply end BST-A High-side bootstrap supply (BST) PVDD-A Right channel power amplifier power supply PVDD-A Right channel power amplifier power supply OUT-A...
  • Page 94 Whether laser head has laser emission...
  • Page 107 +28.5V 4.7K XC100C L4 10uH SLOUT 103 C9 5.1K 0.47u WP12 PGND PGND TAS5112DFD R2080R PWM_SL+ PGND PGND PWM_SL+ +28.5V R2090R PWM_SL- VCC28A PWM_SL- GVDD PGND GREG BST_D C23105 /OTW PVDD_D C32333 R311 /SD_CD PVDD_D PGND /SD_AB OUT_D C28104 R34 1.5 4.7K PWM_DP OUT_D...
  • Page 112 Symptom Causes Symptom Causes Laser head not good Not read CD or Decode board: U302 not good Nerve line not good halt when rading CD Frame not good Not read CD or Decode board: V304 rosin joint Decode board: XS301 not good halt when rading CD Decode board: XS203 not good Not read CD or...
  • Page 113 Symptom Causes Symptom Causes Power amplifier board: R6 not good No sound for mixed left AV: X401 joint welding Decode board: U201 not good No sound for mixed No sound for power AV: C102 short circuit (MT1389) right amplifier Joint welding for panel light emitting Power amplifier board: N12 not No sound for centre diode...
  • Page 114 Symptom Causes Symptom Causes Decode board: U201 not good Power amplifier board: XS402 No sound for tuning (MT1389) rosin joint for flat cable holder Decode board: U302 not good No sound for tuning Power amplifier board: C92 not No sound for tuning (D5954) surround right good...
  • Page 115 Symptom Causes Symptom Causes Screen dark Panel: display screen not good No screen display Decode board: L232 not good No spectrum Decode board: L231 not good Noise when playing Decode board: U201 not good Down when beating Decode board: XS201 not good (MT1389) machine Decode board: U214...
  • Page 152 5.1 CIRCUIT DIAGRAM 耳机板 CDVR938-3 5.1.1 KEY S C A N B O A R D XS106 HGND VD107 C106 LEDDR DGND VD106 HDET Blue LED CON6 CKX-3.5-01K Blue LED DS100 HNV-08SS56 XP204 CON7 MIC2 AGND MIC1 HGND MIC101 MIC2 -21V HDET 1N4148...
  • Page 153 5.1.2 MPEG&SERVO BOARD URST# AVCC V1P4 C222 (DNS) TC202 R219 R308 R309 L206 (DNS) PLLVDD3 C223 20pF JITFO C233 100pF JITFN 10uF/16V R218 R269 R223 (DNS) 1000pF R217 100K 4.7R C277 C234 TC203 (DNS) R216 R311 L205 DV33 RFV33 L207 FB 47uF/16V VREFN VREFP...
  • Page 154 5.1.3 AUDIO MAGNIFY BOARD PWM_H_PR PWM_H_PR AUIN_SL1 AUIN_SL0 OUTPUT PWM_H_MR PWM_H_MR XS401 PWM_H_PL PWM_H_PL +12V MIC(1) PWM_H_ML PWM_H_ML AUX(2) PWM_RR+ PWM_RR+ TUNER(3) PWM_RR- PWM_RR- AGND PWM_RL+ PWM_RL+ PWM_RL- PWM_RL- AGND PWM_SW+ PWM_SW+ AUXR PWM_SW- PWM_SW- AUXL PWM_CEN+ PWM_CEN+ R20 1K PWM_CEN- PWM_CEN- CON8...
  • Page 155 XC103B L102 ROUTX 5.1.4 VIDEO OUTPUT BOARD C102 MIX-out +12V D+5V LOUTX L100 C103 AGND AGND AUXR AUXL L120 VIDIO COMP XP401 C121 CON8 L119 D+5V VIDEO_C C122 VD109 XC103A 1N4148 L106 L118 XC105 VIDEO_Y DASW-02 L122 1.8uH VD108 R105 C123 1N4148 C106...
  • Page 156 5.1.5 POWER BOARD YC502 ~400V 102 DCVPP P-gnd R518 C518 P +28V U505 33R/1W R520 KA1M0880BTU TO-3P-5L R516 C516 R530 D510 BYW29E200 1K/3W R523 47K/2W 103/1KV 1.5K T502 C520 D511 BYW29E200 U506 D508 C521 R522 C523 R519 C522 HER207 C519 ZD503 4.7V 33R/1W...
  • Page 157 5.2 PCB 5 . 2 . 1 A U D I O O U T P U T 1 B O A R D XC106 C119 XC103 XC107 XC104 XC105 C117 R113 L116 XP206 V101 XP401 - 149 -...
  • Page 158 5 . 2 . 2 A U D I O O U T P U T 2 B O A R D - 150 - - 153 -...
  • Page 159 5.2.3 AUDIO MAGNIFY 1 BOARD XC100 R182 C170 R181 R177 R178 R176 R145 R197 R196 R51 R42 R187 R184 R50 R172 R192 R194 R43 R46 R183 R195 R193 R191 R143 R142 C185 XP503 XS402 R117 R126 C139 R224 R119 R125 R120 R124 R123...
  • Page 160 5.2.4 AUDIO MAGNIFY 2 BOARD - 152 -...
  • Page 161 5.2.5 MPEG&SERVO 1 BOARD XS207 R234 C267 DVD RCEIVER DV33 R226 2DVR935-0 XS206 2004/5/15 C281 U211 XS202 TC210 U202 C266 L233 TC201 R230 C263 R214 L226 VD201 VFDCK L232 R252 C216 C264 L203 C259 R216 C274 VFDST L231 R217 C265 R2159 VFDAT L230...
  • Page 162 5.2.6 MPEG&SERVO 2 BOARD R2164 C244 C257 L235 C245 R213 R215 R220 R218 C253 C2167 C256 L249 C276 C230 C207 R2166 C275 R318 C2158 C252 C235 R2165 C239 L202 C236 C251 C254 C307 C225 C219 L201 C220 R223 C237 C221 C228 C222 C214...
  • Page 163 5.2.7 KEY S C A N 1 B O A R D...
  • Page 164 5.2.8 KEY S C A N 2 B O A R D VD106 MIC100 VD107 MIC101...
  • Page 165 5.2.9 POWER BOARD - 157 -...
  • Page 166 Chapter six BOM List material code material name Spec Location 6.1 power board DK1020S（RU）-2 5445680 2100017 CONNECTED CORDS F 0.6 SHAPED 20mm W1,W2 2100003 CONNECTED CORDS F 0.6 SHAPED 7.5mm W3,W7,W8,W9,W10 2100004 CONNECTED CORDS F 0.6 SHAPED 10mm W4,W5,R514 2100007 CONNECTION CORDS F 0.6 SHAPEN 15mm...
  • Page 167 material code material name Spec Location C504,C507,C509,C511 0200105 PORCELAIN CAPACITOR 50V 100P ± 10% 5mm ,C512,C518,C519 0200123 PORCELAIN CAPACITOR 50V 102 ± 10% 5mm C513,C520 0200134 PORCELAIN CAPACITOR 50V 223 ± 20% 5mm C503 0200138 PORCELAIN CAPACITOR 50V 104 ± 20% 5mm C502,514,517,521 0200224 PORCELAIN CAPACITOR...
  • Page 168 material code material name Spec Location 0570006 DIODE 1N4148 D502 0570013 DIODE HER105 D503,D506,D507,D509 0570014 DIODE HER107 D501 0570042 DIODE HER207 SHAPED 12.5mm D508 0570045 DIODE BYW29E-200 TO-220 D510,D511 05800069 VOLTAGE REGULATOR DIODE 5.1V ± 5% 1/2W BELT ZD501 0580022 VOLTAGE REGULATOR DIODE 12V ±...
  • Page 169 SELF-TAPPING SCREW BT 3×8H WHITE NICKEL 4000564 SELF-TAPPING SCREW PWT 3×12×7H WHITE NICKEL 4000627 SELF-TAPPING SCREW PWT 2.6×6×5H BLACK ZINC 6.2 EARPHONE　board DK1020S（RU）-2 5445680 ④ 0310207 SMD CAPACITOR 50V 104 ± 20% X7R 0603 ④ 0310543 SMD CAPACITOR 50V 104 ± 10% X7R 0603...
  • Page 170 material code material name Spec Location VERTICAL SCREEN SHIELD 0410176 10uH ± 10% 4A 5mm L1~L4,L9~L11 FILTERING INDUCTOR 0570004 DIODE 1N4004 VD9,VD10 05800069 VOLTAGE REGULATOR DIODE 5.1V ± 5% 1/2W BELT VD2,VD3 05800099 VOLTAGE REGULATOR DIODE 9.1V ± 5% 1/2W BELT 0780032 TRIODE 9014C...
  • Page 171 Spec Location 6.4 decode board 5445770（VER3.3 ） DK1020S（RU）-2 0000375 CARBON FILM RESISTOR 1/4W2.2O± 5% R326 0260019 CD11 16V10U± 20%5×11 2 TC201,TC202 TC207~TC209,TC211, 0260028 CD11 16V220U± 20%6×12 2.5 TC213,TC301 TC203~TC206,TC210, TC247,TC248,TC237,T 0260025 CD11 16V47U± 20%5×11 2 C302~TC304,TC308,T...
  • Page 172 material code material name Spec Location 0090014 SMD RESISTOR 1/16W 1K ± 5% 0603 R213,R215,R254 0090016 SMD RESISTOR 1/16W 1.5K ± 5% 0603 R323,R324,R243 0090123 SMD RESISTOR 1/10W 33O ± 5% 0805 L202 0090249 SMD RESISTOR 1/16W 510O ± 5% 0603 R214 0090018 SMD RESISTOR...
  • Page 173 material code material name Spec Location C207,C211,C214,C216 ,C217,C224,C226~C23 1,C234~C239,C241~C 254,C256~C259,C267, C270~C274,C279,C28 0310207 SMD CAPACITOR 50V104 ± 20% 0603 1,C301~C303,C305,C3 09,C311,C312,C2160, C2162,C2163,C2167,C 2168,C2170,C2171,C2 173~C2175,C277,C343 ~C345,C280⑩ C207,C211,C214,C216 ,C217,C224,C226~C23 1,C234~C239,C241~C 254,C256~C259,C267, C270~C274,C279,C28 0310543 SMD CAPACITOR 50V 104 ± 10% X7R 0603 1,C301~C303,C305,C3 09,C311,C312,C2160, C2162,C2163,C2167,C 2168,C2170,C2171,C2 173~C2175,C277,C343...
  • Page 174 0881378 BA5954FP HSOP U302　　　⒂ 1940094 CABLE SOCKET 24P 0.5mm SMD WITH CLASP XS301 1631576 2DAV935-0 6.5 SURFACE CONTROL BOARD DK1020S（RU）-2 5445684 0000540 CARBON FILM RESISTOR 1/2W150O± 5% SHAPED 12.5 R121,R117 0260025 CD11 16V47U± 20%5×11 2 C108 0260200 CD11C 16V47U± 20%5×7 2...
  • Page 175 0310543 SMD CAPACITOR 50V 104 ± 10% X7R 0603 C111,C110,C107　⒆ 0310195 SMD CAPACITOR 50V 221 ± 10% X7R 0603 C114,C115,C116 1632035 6DVR938-8 6.6 INPUT OUTPUT BOARD DK1020S（RU）-2 5445682 L100,L102~L105,L118~ 0390057 MAGNETIC BEADS INDUCTOR RH354708 L122 0780028 TRIODE 8050C(120-200) TO-92 V100~V102...
  • Page 176 0390096 SMD INDUCTOR 1.8UH ± 10% 1608 114,L116 0700007 SMD DIODE 1N4148 VD100~VD111 1631897 1DVR938-3 remote control DK1020S（RU）-2 5470973 0000599 CARBON FILM RESISTOR 1/6W100K± 5% BELT 0200062 PORCELAIN CAPACITOR 50V 151 ± 10% 2.5mm 0570006 DIODE 1N4148 - 168 -...
  • Page 177 material code material name Spec Location 0630003 EMISSION PIPE TSAL6200 0780138 TRIODE 8050D 0880220 PT2222 SOP 0970003 CERAMIC RESONATOR 455E 1561684 8219-1 2100003 CONNECTED CORDS F 0.6 SHAPED 7.5mm SURFACE CASING OF REMOTE 3031194 RC-109 SILVER WHITE CONTROL ROMOTE CONTROL BOTTOM 3040873 RC-109 SILVER WHITE CASING...

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