BBK BBK938S Service Manual
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BBK BBK938S Service Manual

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SERVICE MANUAL
BBK938S

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Summary of Contents for BBK BBK938S

  • Page 1 SERVICE MANUAL BBK938S...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS PREVENTION OF ELECTRO STATIC DISCHARGE(ESD)TO ELECTROSTATICALLY SENSITIVE(ES)DEVICES CONTROL BUTTON LOCATIONS AND EXPLANATIONS PREVERTION OF STATIC ELECTRICITY DISCHARGE ASSEMBLING AND DISASSEMBLING THE MECHANISM UNIT OPTICAL PICKUP UNIT EXPLOSED VIEW AND PART LIST BRACKET EXPLOSED VIEW AND PART LIST MISCELLANEOUS ELECTRICAL CONFIRMATION VIDEO OUTPUT (LUMINANCE SIGNAL) CONFIRMATION...

  • Page 3: Safety Precautions

    1. SAFETY PREAUTIONS 1.1 GENERAL GUIDELINES 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 installed.

  • Page 4: Control Button Locations And Explanations

    3.Control Button Locations and Explanations Front Panel llustration 11 12 13 POWER switch MIC VOLUME knob PLAY Button MIC 1 jack Disc tray PAUSE Button Playback Indicator MIC 2 jack STOP Button VFD display window DIRECTION Arrow ECHO adjustment knob OPEN/CLOSE button...
  • Page 5 STANDBY Button Press once to stand by, Press twice to play. OSD Button Display or hid disc information. GOTO Button STANDBY SUBTITLE EJECT Play from the desired location. AUDIO Button GOTO AUDIO ANGLE MUTE Change the audio language or audio channel. NUMBER Buttons TITLE Button DVD title.

  • Page 6: Prevertion Of Static Electricity Discharge

    4.PREVENTION OF STATIC ELECTRICITY DISCHARGE The laser diode in the traverse unit (optical pickup)may brake down due to static electricity of clothes or human body. Use due caution to electrostatic breakdown when servicing and handling the laser diode. 4.1.Grounding for electrostatic breakdown prevention Some devices such as the DVD player use the optical pickup(laser diode)and the optical pickup will be damaged by static electricity in the working environment.Proceed servicing works under the working environment where grounding works is completed.

  • Page 7: Assembling And Disassembling The Mechanism Unit

    5. Assembling and disassembling the mechanism unit 5.1 Optical pickup Unit Explosed View and Part List Pic (1)
  • Page 8 Materials to Pic (1) PARTS CODE PARTS NAME Q ty 14692200 SF-HD60 1EA0311A06300 ASSY, CHASSIS, COMPLETE 1EA0M10A15500 ASSY, MOTOR, SLED 1EA0M10A15501 ASSY, MOTOR, SLED 1EA2451A24700 HOLDER, SHAFT 1EA2511A29100 GEAR, RACK 1EA2511A29200 GEAR, DRIVE 1EA2511A29300 GEAR, MIDDLE, A 1EA2511A29400 GEAR, MIDDLE, B 1EA2744A03000 SHAFT, SLIDE 1EA2744A03100...

  • Page 9: Bracket Explosed View And Part List

    5.2 Bracket Explosed View and Part List Pic (2) Materials to Pic(2) 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.

  • Page 10: Miscellaneous

    5.3 MISCELLANEOUS 5.3.1 Protection of the LD(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.

  • Page 11: Electrical Confirmation

    6.Electrical Confirmation 6.1. Video Output (Luminance Signal) Confirmation DO this confirmation after replacing a P.C.B. Measurement point Mode Disc Color bar 75% DVDT-S15 Video output terminal PLAY(Title 46):DVDT-S15 PLAY(Title 12):DVDT-S01 DVDT-S01 Measuring equipment,tools Confirmation value 200mV/dir,10 sec/dir 1000mVp-p±30mV Purpose:To maintain video signal output compatibility. 1.Connect the oscilloscope to the video output terminal and terminate at 75 ohms.

  • Page 12: Video Output(Chrominance Signal) Confirmation

    6.2 Video Output(Chrominance Signal) Confirmation Do the confirmation after replacing P.C.B. Measurement point Mode Disc Color bar 75% DVDT-S15 Video output terminal PLAY(Title 46):DVDT-S15 PLAY(Title 12):DVDT-S01 DVDT-S01 Measuring equipment,tools Confirmation value Screwdriver,Oscilloscope 200mV/dir,10 sec/dir 621mVp-p±30mV Purpose:To maintain video signal output compatibility. 1.Connect the oscilloscope to the video output terminal and terminate at 75 ohme.

  • Page 13: Mpeg Board Check Waveform

    7.MPEG BOARD CHECK WAVEFORM 7.1 27MHz WAVEFORM DIAGRAM 7.2 IC5L0380R PIN.2 WAVEFORM DIAGRAM...

  • Page 14: Ic Block Diagram & Description

    MT1336 PRELIMINARY, SUBJ ECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE 8. IC BLOCK DIAGRAM & DESCRIPTION 8.1 MT1336 GENERAL DESCRIPTION M T 1 3 3 6 i s a h i g h p e r f o r m a n c e C M O S a n a l o g f r o n t -e n d I C f o r b o t h C D _ R O M d r i v e r u p t o 4 8 X S a n d D V D - R O M d r i v e r u p t o 1 6 X S .
  • Page 15 MT1336 PRELIMINARY, SUBJ ECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE DVDA RFOP DVDB ATTENUATOR INPUT MUX RFON DVDC LRFRP DEFECT DVDD HRFRP CRTP DVDRFIN ENVELOP ENVELOP CRTPLP DETECTOR DETECTOR DVDRFIP REFCOS HALLCOS SBAD COSPHI DPFN REFSIN DPFO HALLSIN SINPHI DPDMUTE MDI2...
  • Page 16 MT1336 PRELIMINARY, SUBJ ECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE WOBSO WVDD AGNDX DVDA AGNDX DVDB AVDDO DVDC RFOP DVDD RFON DVDRFIP AGNDO DVDRFIN AGNDT MT1336 AVDDT V2REFO RFGC VREFO DVD-ROM RFGCU RFGCI CEQP With CEQN AGNDX DVD_RAM AGNDX VDDP Read...
  • Page 17 MT1336 PRELIMINARY, SUBJ ECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE MT1336 PIN DESCRIPTIONS Pin Numbers Symbol Type Description LQFP128 RF Flag Interface DEFECT Digital Output Flag of bad data output status RF SIO interface SCLK Digital Input RF serial clock input SDEN Digital Input RF serial data enable...
  • Page 18 MT1336 PRELIMINARY, SUBJ ECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE RFGCU Analog RF AGC loop capacitor connecting for DVD -RAM RFGCI Analog RF AGC loop capacitor connecting for DVD -RAM Analog Input DC coupled DVD-RAM main-beam RF signal input A Analog Input DC coupled DVD-RAM main-beam RF signal input B Analog Input...
  • Page 19 MT1336 PRELIMINARY, SUBJ ECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Analog Input MDI1 Laser power monitor input LDO1 Analog Ou tput Laser driver output Analog Input MDI2 Laser power monitor input LDO2 Analog Output Laser driver output RF RIPPLE CRTP Analog RF top envelop filter capacitor connecting...
  • Page 20 MT1336 PRELIMINARY, SUBJ ECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE ALPC TRIMMING Analog input Trimming pin for ALPC1 Analog input Trimming pin for ALPC1 Analog input Trimming pin for ALPC2 Analog input Trimming pin for ALPC2 HIGH SPEED TRACK COUNTING TRLP Analog Low-pass filter capacitor connecting...
  • Page 21 MT1336 PRELIMINARY, SUBJ ECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE...

  • Page 22: Mt1379

    MT1379 Progressive Scan DVD Player Combo Chip Speci f i c ati o ns are subj e ct to change wi t hout noti c e 8.2 MT1379 § Tray control can be PWM output or digital output Super Integration DVD player single chip §...
  • Page 23 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE § cycle timings Downmix function § § Block-based sector addressing Support IEC 60958/61937 output § Programmable buffering counter for buffer status - PCM / bit stream / mute mode tracking - Custom IEC latency up to 2 frames §...
  • Page 24 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE EFINITIONS Pin Number Symbol Type Description IREF Analog Input Current reference input. It generates reference current for data PLL. Connect an ext ernal 100K resistor to this pin and PLLVSS. PLLVSS Ground Ground pin for data PLL and related analog circuitry...
  • Page 25 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Pin Number Symbol Type Description HIGHA6 Inout Microcontroller address 14 2~16MA, SR HIGHA7 Inout Microcontroller address 15 2~16MA, SR Inout Microcontroller address/data 7 2~16MA, SR Inout Microcontroller address/data 6 2~16MA, SR Inout Microcontroller address/data 5...
  • Page 26 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Pin Number Symbol Type Description IOA7 Inout Microcontroller address 7 / IO 2~16MA, SR Output Flash address 16 2~16MA, SR Output Flash address 17 2~16MA, SR IOA18 Inout Flash address 18 / IO 2~16MA, SR IOA19 Inout...
  • Page 27 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Pin Number Symbol Type Description UP1_7 Inout Microcontroller port 1 -7 4MA, SR PU, SMT UP3_0 Inout Microcontroller port 3 -0 4MA, SR PU, SMT UP3_1 Inout Microcontroller port 3 -1 4MA, SR PU, SMT INT0#...
  • Page 28 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Pin Number Symbol Type Description RD14 Inout DRAM data 14 2~16MA, SR PU/PD, SMT RD13 Inout DRAM data 13 2~16MA, SR PU/PD, SMT RD12 Inout DRAM data 12 2~16MA, SR PU/PD, SMT DVDD3 Power...
  • Page 29 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Pin Number Symbol Type Description DQM0 Output Mask for DRAM input/output byte 0 2~16MA, SR Output DRAM bank address 0 2~16MA, SR RA10 Output DRAM address10 2~16MA, SR DVDD2 Power 2.5V power pin for internal digital circuitry Output...
  • Page 30 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Pin Number Symbol Type Description RD23 Inout DRAM data 23 / 2~16MA, SR Videoin Data PortA 7 PU/PD, SMT RD22 Inout DRAM data 22 / 2~16MA, SR Videoin Data PortA 6 PU/PD, SMT DVDD2 Power...
  • Page 31 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Pin Number Symbol Type Description ASDATA3 Inout Audio serial data 3 (surround left/surround right channel) Trap value in power-on reset : PD SMT 1 : manufactory test mode 0 : normal operation OR Videoin Data PortB 1 ASDATA4 Inout...
  • Page 32 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Pin Number Symbol Type Description SPDATA Input Audio data of SPDIF input / Videoin Data PortB 5 DVDD2 Power 2.5V power pin for internal digital circuitry SPLRCK Input Audio left/right channel clock of SPDIF input / Videoin Data PortB 6 SPBCK Input...
  • Page 33 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE 26 Jul, 2002 Page 1 of 2 IREF YUV0/CIN PLLVSS LPIOP VREF LPION DACVDDC LPFON ASDATA4 LPFIP ASDATA3 LPFIN ASDATA2 LPFOP ASDATA1 JITFO ASDATA0 JITFN SPDIF PLLVDD3 MC_DATA ACLK DVDD3 TROPENPWM ALRCK...
  • Page 34 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE UNCTIONAL LOCK D V D m o d u l e S e r v o A n a l o g S p i n d l e D e b u g S y s t e m T V e n c o d e r...
  • Page 35 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE controller changes the mode and speed of operation according to servo register setting. The PWM generator generates pulse -width-modulated signal to drive disc spindle motor driver. CSS/CPPM The CSS/CPPM module provides functions necessary for decoding discs conforming to CSS/CPPM specification. System Parser The system parser is used to help the system controller to decode DVD/SVCD/VCD bitstream just after the channel decoder performing error correction.
  • Page 36 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE This is a hardware sub-picture decoder. It decodes the compressed SPU image bitstream and CHG_COLCON commands according to SPU header information previously decoded by system controller. The SPU module also allows two SPU objects to be displayed at the same time.
  • Page 37 MT1379 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE LECTRICAL HARACTERISTICS Absolute Maximum Rating Symbol Parameters Value Unit VDD3 3.3V Supply voltage -0.3 to 3.6 VDD2 2.5V Supply voltage -0.3 to 3.0 VDDA Analog Supply voltage -0.3 to 3.6 Input Voltage -0.3 to 5.5 Output Voltage...

  • Page 38: U214 Hy29F800

    IC BLOCK DIAGRAM & DESCRIPTION 8.3 U214 HY29F800 KEY FEATURES n Sector Protection n 5 Volt Read, Program, and Erase – Minimizes system-level power requirements – Any combination of sectors may be n High Performance locked to prevent program or erase –...
  • Page 39 IC BLOCK DIAGRAM & DESCRIPTION BLOCK DIAGRAM DQ[15:0] A[18:0], A-1 STATE C O N T R O L ERASE VOLTAGE I/O BUFFERS G E N E R A T O R A N D DQ[15:0] S E C T O R S W I T C H E S C O M M A N D W E # REGISTER...
  • Page 40 IC BLOCK DIAGRAM & DESCRIPTION PIN CONFIGURATIONS RY/BY# RESET# W E # BYTE# DQ15/A-1 DQ14 DQ13 DQ12 W E # Standard BYTE# RESET# DQ11 TSOP48 DQ15/A-1 RY/BY# DQ10 DQ14 DQ13 DQ10 DQ12 DQ11 BYTE# DQ15/A-1 DQ14 DQ13 DQ12 W E # Reverse RESET# DQ11...

  • Page 41: U203 Sdram-Hy57V1610D

    IC BLOCK DIAGRAM & DESCRIPTION U203 SDRAM-HY57V1610D 2 Banks x 512k x 16 Bit Synchronous DRAM D E S C R I P T I O N T H E H y n i x H Y 5 7 V 1 6 1 6 1 0 D i s a 1 6 , 7 7 7 , 2 1 6 - b i t s C M O S S y n c h r o n o u s D R A M , i d e a l l y s u i t e d f o r t h e M o b i l e a p p l i c a t i o n s w h i c h r e q u i r e l o w p o w e r c o n s u m p t i o n a n d i n d u s t r i a l t e m p e r a t u r e r a n g e .
  • Page 42 IC BLOCK DIAGRAM & DESRIPTION P I N C O N F I G U R A T I O N V D D V S S D Q 0 D Q 1 5 D Q 1 D Q 1 4 V S S Q V S S Q D Q 2...

  • Page 43: Schematic & Pcb Wiring Diagram

    9.SCHEMATIC & P.C.B WIRING DIAGRAM FRONT SCHEMATIC DIAGRAM SEG1 SEG2 GRID4 SEG8 GRID3 SEG7 GRID2 SEG6 GRID1 SEG5 SEG4 SEG3 LED4 SEG2 LED3 SEG1 LED2 LED1 KEY4 KEY3...
  • Page 44 FRONT SCHEMATIC DIAGRAM...
  • Page 45 POWER BOARD SCHEMATIC DIAGRAM...
  • Page 46 POWER BOARD SCHEMATIC DIAGRAM...
  • Page 47 OK SCHEMATIC DIAGRAM R622 4.7K R617 LPF1-IN R616 5.6K LPF1-OUT R620 AGND LPF2-OUT DGND LPF2-IN CLKO OP2-OUT OP2-IN OP1-IN OP1-OUT...
  • Page 48 OK SCHEMATIC DIAGRAM...
  • Page 49 OUTPUT BOARD SCHEMATIC DIAGRAM...
  • Page 50 OUTPUT BOARD SCHEMATIC DIAGRAM...
  • Page 51 MIAN SCHEMATIC DIAGRAM...
  • Page 52 MIAN SCHEMATIC DIAGRAM...
  • Page 53 MIAN SCHEMATIC DIAGRAM...
  • Page 54 MIAN SCHEMATIC DIAGRAM...
  • Page 55 MIAN SCHEMATIC DIAGRAM...
  • Page 56 MIAN SCHEMATIC DIAGRAM...

  • Page 57: Spare Parts List

    10.BBK938S MATERIAL LIST BBK938S MATERIAL LIST 1 DECODING BOARD MATERIAL SPECIFICATIONS/PART NUMBER QUANTITY LOCATION C2119,C2128,C2131,L243~L248,R205,R 219,R220,R226,R240,R241,R243,R255,R SMD RESISTOR 1/16W 0 ±5% 257,R259,R282,R297,R324,R325,R332,R 337,R2162 SMD RESISTOR 1/16W 75 ±5% R256 CARBON FILM 1/4W2.2 ±5% R341 RESISTOR SMD RESISTOR 1/16W1 ±5% R312,R313,R317,R318,R336 SMD RESISTOR 1/16W 4.7...
  • Page 58 C216,C273,C274,C342,C2111,C2114,C2 SMD CAPACITOR 50V 101 ±5% NPO 0603 117,C2120,C2123,C2126 SMD CAPACITOR 50V 331 ±5% NPO 0603 C217,C218 SMD CAPACITOR 50V 151 ±5% NPO 0603 C331,C334 SMD CAPACITOR 50V 391 ±10% 0603 C304,C305 SMD CAPACITOR 50V 471 ±10% 0603 C307 C201~C211,C221,C224,C227,C230~ C232,C234,C235,C237,C240,C245~ C253,C272,C278~C283,C289~C297, SMD CAPACITOR...
  • Page 59 63.1 IC HCU04 SOP U205 HY57V161610DTC-7 TSOP U203,U204 64.1 IC M12L16161A-7T SOP U203,U204 64.2 IC GM72V161621ET75 SOP U203,U204 64.3 IC AE45C16016T-7 SOP U203,U204 CS4360 SSOP U207 24C02N SOP U202 MT1336E QFP U301 MT1379E QFP U201 BA5954FP HSOP U302 CRYSTAL 27.00MHz 49-S X201 OSCILLATOR 14P 1.0mm STRAIGHT DUAL LINE...
  • Page 60 PORCELAIN 1000V 103 +80%-20% 7.5mm C502 CAPACITOR CERAMIC CT81 400V 221±20% 10mm BC503 CAPACITOR CERAMIC 16.1 CT81 400V221±10% 10mm BC503 CAPACITOR TERYLENE 100V 223 ±10% 5mm C506 CAPACITOR TERYLENE 275V 104 ±20% 15mm BC502 CAPACITOR TERYLENE 18.1 275V 104 ±10% 15mm BC502 CAPACITOR GZ16V100U±20%6×12 2.5...
  • Page 61 SOCKET 2P 2.5mm CN502 SOCKET 6P 2.5mm CN504 SOCKET 2P 8.0mm 2# BCN501,BCN502 CONNECTION 0.6 SHAPED 7.5mm J506,J503 CORDS CONNECTION 0.6 SHAPED 10mm L501,J501,J505 CORDS CONNECTION J504,J502 0.6 SHAPED 12.5mm CORDS FUSE T1.6AL 250V F501 FUSE HOLDER BLX-2 FOR F501 HEAT RADIATOR U501,U504 FOR HEAT 11×15×25 AB009K...
  • Page 62 5P170 2.0 2 PLUG WITH L NEEDLE, FLAT CABLE XS401 REVERSED 5P100 2.0 2 PLUG WITH L NEEDLE, FLAT CABLE XS402 REVERSED LED BRACKET H=5.5mm 3.0mm IR SENSOR HS0038A2 U403 4 OK BOARD MATERIAL SPECIFICATIONS/PART NUMBER QUANTITY LOCATION CARBON FILM 1/6W10 ±5% SHAPED 7.5 R632,R633 RESISTOR...
  • Page 63 MATERIAL SPECIFICATIONS/PART NUMBER QUANTITY LOCATION CARBON FILM 1/4W68 ±5% R703 RESISTOR CARBON FILM R702 1/4W100 ±5% RESISTOR CARBON FILM 1/4W220 ±5% R701 RESISTOR CARBON FILM 1/4W330 ±5% R709 RESISTOR SMD RESISTOR R706 1/16W 2.2 ±5% CARBON FILM 1/4W1K±5% R711 RESISTOR CARBON FILM R708 1/4W33 ±5%...

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