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BBK DK1010S Service Manual

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Principle and Maintenance of DK1010S
Chapter I Overview of DK1010S
1、Description of Functions
2、Block Diagram of Player
3、Composition of IC for Player
Chapter II Operating Principle of Servo Circuit
1、Processing Procedure of Digital Signal
2、Processing Procedure of Control Signal
Chapter III Operating Principle of Decoding Circuit
1、Control Circuit of System
2、Audio and Video Output Circuit
Chapter IV Operating Principle of Power Board
1、Block Diagram
2、Operating Principle of Circuits
Chapter V Operating Principle of Panel
1. Operating Principle
Chapter VI Troubleshooting
Appendix: Functions of IC Pins
CONTENTS

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Summary of Contents for BBK DK1010S

  • Page 1 Principle and Maintenance of DK1010S CONTENTS Chapter I Overview of DK1010S 1、Description of Functions 2、Block Diagram of Player 3、Composition of IC for Player Chapter II Operating Principle of Servo Circuit 1、Processing Procedure of Digital Signal 2、Processing Procedure of Control Signal Chapter III Operating Principle of Decoding Circuit 1、Control Circuit of System...
  • Page 2 Important prompt: This type player employs two kinds of decks, SF-HD62 and SF-HD60, and corresponding software of these two t y pes of decks are different, therefore please pay special attention during deck changing in the maintenance. Corresponding decks should be changed with the same type of original ones, otherwise the player will be out of order.

  • Page 3: Chapter I Overview Of Dk1010S

    ROMDK1010S-0A (16M). This maintenance manual can be applied to player models of DK1010S, DK1020S, DK1030S, DK1040S, DK1015S, etc. Operating Principle Analysis of DK1010S Chapter I Overview of DK1010S DK1010S is a medium- low-grade model integrating with video disc and power amplifier, with the following major features: 1.
  • Page 4 II. Block Diagram of DK1010S Complete Player and IC Function Table Radio reception head composite 29LV160BE S terminal AT24C02 16M ROM Y/Cb/Cr status MT1389 Sany 4340，7265 deck 6-way Audio D/A， power BA5954 focus HCU04 track Refor fiber, feed main Y/Pb/Pr...

  • Page 5: Chapter Ii Operating Principle Of Servo Circuit

    Chapter II Operating Principle of Servo Circuit I. Digital Signal Processing Procedure DK1010S adopts Sanyo double beam super error correction deck and MTK decoding solution, and its servo circuit mainly consists of preposition signal processing, digital servo processing, digital signal processing IC MT1389 and driver circuit BA5954. MT1389 is also a main part of the decoding circuit.
  • Page 6 through the 2-13 pins of MT1389, and after amplifying treatment of built- in amplifier of MT 1389, the signals are treated in two parts within MT1389: After being processed by the internal digital servo signal circuit of MT1389, part of the signal forms into corresponding servo control signal, and output focus (FOSO), tracking (TRSO), main shaft (DMSO) and feed (FMSO) servo control signal from the P42, P41, P37 and P38 of MT1389 and send them to the driver circuit BA5954 to amplify the drive.
  • Page 7 Figure III Different from the circuit in former MTK solution, the MT1389 is integrated with preposition signal processing circuit, so the tray open/close control signals are accomplished by MT1389, that is to say, the close control signal is accomplished by the Pin 51 of MT1389, while the open control signal by Pin 39 of MT1389.
  • Page 8 Figure IV During playing, if we press the OPEN button, the main shaft drive signal will disappear, and because of inertia, the main shaft motor is still in operation. As the electromotive force generated in the operation of motor receives the induction voltage on sampling resistors R321 and R340, which, through the resistor R319 and R320, is added to the Pin 36 and Pin 35 of MT1389, and outputted from the Pin 34 after internal processing for amplification in MT1389, and delivered to Pin 47 of MT1389 through R318.

  • Page 9: Chapter Iii Operating Principle Of Decoding Circuit

    The STBY on Pin 28 of BA5954 is an output-enabling signal, and only when the pin is in high power level, there will be output of drive voltage on the output terminal. Chapter III Operating Principle of Decoding Circuit The decoding circuit of the player mainly consists of decoding chips (including MT1389, SDRAM AE45164016 and FLASH ROM 29LV160BE) and audio DAC CS4360.
  • Page 10 II. Audio and Video Output Circuit 1. Video output circuit DK1010S can not only output three types of alternating- line video signal (including CVBS composite video, S terminal Y -C signal and Y/Cb/Cr color difference signal), but also output two types of progressive line video signal (including Y/Pb/Pr progressive line color difference signal and VGA progressive line signal).
  • Page 11 DK1010S has the function of radio reception, and can also receive RDS signal. The radio head control lines CE, DI, CL and DO are controlled by 28 array lines connecting to MT1389 control.

  • Page 12: Chapter Iv Operating Principle Of Power Board

    When any of the controlling lines is in abnormality, the radio reception will be in malfunction. The RDS signal received by radio head will be delivered to the dedicated IC SAA6588 for processing. Chapter IV Operating Principle of Power Board I.
  • Page 13 group supplying power for 3.3V is lower, it adopts 17431. For two ICs are different, you should pay special attention to distinguish them from each other. They cannot be used mixing. Chapter 5: Panel control and VFD display circuit The panel mainly consists of VFD screen, driver IC0793, remote receptor HS0038A2 and button and indicator display circuit, mainly for accomplishing man-player dialogue and display of operation status.

  • Page 14: Troubleshooting

    When in normal condition, this detection pin is of high level around 3.3V. Troubleshooting I. Voltage on key points of DK1010S Demoding circuit: Reset: 1. U205 (HCU04): 8 pins, around 5V;...
  • Page 15 II. Troubleshooting of main troubles No picture, no sound, no VFD display Check the voltage of power board, Check if power supply of MT1389 and check if the decoding board is 3.3V, 1.8V is right? short circuit to the grounding. Check if clock oscillating circuit If the clock signal output XO 27M crystal oscillator, C275,...
  • Page 16 Do not read disc Check if the connection from Check if the feed control BA5954 to MT1389 laser Check input of BA5954 Pin 23 is is open circuit? head has feed action. 1.4V? Check if BA5954 pin 17,18 Check feed motor have 2.5V voltage output? and its connection.
  • Page 17 Check if there is Check if the signal Check MT1389 and its laser coming out voltage of LD01, LD02 connection. from laser head? is 3.2V? Check if V301 and V302 Check if the laser head electron collector voltage is and its array line are 2.3V? right? Check if the control...
  • Page 18 Attachment ：Brief Introduction to IC Pins I. MT1389 MT1389 adopts the LQFP 256 pin packaging and 3.3V/1.8V double voltage operation mode. It is a piece of large-scale CD-ROM and DVD-ROM preposition processing CMOS integrated circuit with excellent performance, and a single chip dedicated to CD/VCD/DVD player. It contains focusing servo error amplification, tracking servo error amplification and RF level output servo control, including the following main functions: RF small signal preposition processing, mainly for carrying our corresponding processing and...
  • Page 19 DVD-RAM main light beam RF DC signal input B DVD-RAM main light beam RF DC signal input C DVD-RAM main light beam RF DC signal input D DVD-RAM auxiliary light beam RF DC signal input A DVD-RAM auxiliary light beam RF DC signal input B DVD-RAM auxiliary light beam RF DC signal input C...
  • Page 20 TEZISLV Tracking zero crossover error input OP_OUT Sensing signal amplification output OP_INN Sensing signal phase inversion input OP_INP Sensing signal non- inverting input Main shaft control signal output Feed control signal output TROPEN PWM Tray Open signal output First-route pulse width demodulating PWMOUT1/ADIN9 signal output/AD universal input Tracking control signal output...
  • Page 21 capacitor APLLVSS Analogue phase lock loop grounding APLLVDD3 Analogue phase lock 3.3V power supply IOWR FLASH read control signal 67-72 HIGHA3-7 Micro-controller address bit 3-7 73、80、108、 127、141、155、 DVDD3 Digital 3.3V power supply 167、182、204、 74、75 HIGHA1-2 Micro-controller address bit 1-2 IOA20 Micro-controller address bit 20 IOCS FLASH chip selection...
  • Page 22 INT0 Micro-processor interruption 0 DQM0 DRAM input output shielding signal DQS0 DRAM input output shielding signal DRAM data 117-118 RD5-6 DRAM data 120-121 RD3-4 DRAM data 123-125 RD0-2 DRAM data RD15 DRAM data 128-133 RD9-14 DRAM data DRAM data DQS1 DRAM input output shielding signal DQM1 DRAM input output shielding signal...
  • Page 23 RD26 DRAM data 176-177 RD24-25 DRAM data 178-179 DQM2-3 DRAM I/O shielding signal 180-181 RD22-23 DRAM data 183-188 RD16-21 DRAM data DACVDDC D/A conversion 3.3V power supply VREF Reference voltage 　 　 YUV0/CIN DACVSSC D/A conversion grounding Video signal YUV1 output/Y signal YUV1/Y output DACVDDB...
  • Page 24 　 SPLRCK 　 SPBCK/ASDATA5 ALRCK Audio left and right sound channel clock ABCK Audio bit clock ACLK Audio DAC external clock 217-220 ASDATA0-3 Audio series data ASDATA4 Audio series data MC_DATA Microphone digital audio input SPDIF Digital audio signal output RFGND18 RF signal grounding RFVDD18...
  • Page 25 crossover checking 　 CRTPLP RFGND RF grounding 　 CEQP 　 CEQN 　 　 　 RFGC IREF Reference current AVDD3 Analogue 3.3V power supply Ⅱ.BA5954 BA5954 is a piece of servo drive single-piece integrated circuit, with built- in 4-channel BTL drive circuit.
  • Page 26 VOSL- Main shaft drive inverse voltage output VO2+ Main shaft forward voltage output VOFC- Focusing drive inverse voltage output VOSC+ Focusing drive forward voltage output VOTK+ Tracking drive forward voltage output VOTK- Tracking drive inverse voltage output VOLD+ Feed drive forward voltage output VOLD- Feed drive inverse voltage output PGND...
  • Page 27 High Reset × × × × High resistance High resistance resistance The functions of pins of 29LV160BE are as the following table: Name Function RY/BY Ready/system is busy 1~9、16~25 、48 20-byte address bus A0~A19 Chip enabling 27、46 Grounding Output enabling 29~36、38~44 DQ0~DQ14 15-byte data bus...
  • Page 28 LDQM Data I/O shielding signal Write control signal Column address gate signal Row address gate signal Chip selection signal Section address 0 gate signal SD-BS0 SD-BS1 Section address 1 gate signal 22~26、29~35 MA[0~11] 12-byte address bus 36、40 Neutral pin Clock enabling signal System clock input UDQM Data I/O shielding signal...
  • Page 29 RESERVED Connect to digital grounding Digital signal Clock signal LRCLK RF channel clock signal SCLK Audio clock signal SDIN4 Audio data input pin SDIN3 Audio data input pin SDIN2 Audio data input pin SDIN1 Audio data input pin PSVC Control PWM signal output VR_DIG 1.8V reference voltage of digital core DVSS...
  • Page 30 IV. IC TAS5112 IC TAS5112 is an audio power amplifier of high performance made by TI. Bridging with 6O loading, each channel can output 50W. It has 95DB dynamic range, low distortion degree and low rate of heat generation with power efficiency up to 90%. It also has functions of low-voltage protection, high-temperature protection, overflow protection, etc.
  • Page 31 RESET_AB Reset signal , valid in low level RESET_CD Reset signal , valid in low level SD_AB Signal switch off control SD_CD Signal switch off control IIV. IC SE5532 IC SE5532 is an amplified IC with dual channels and low noise. Compared to most other amplified ICs, it has lower noise, better output performance and power bandwidth.