LG DVX286 Service Manual
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LG DVX286 Service Manual

LG DVX286 Service Manual

Dvd-video player
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DVD-VIDEO PLAYER
SERVICE MANUAL
MODELS : DVX286/DV286/DV286K
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
JANUARY, 2007
P/N : AFN31629357

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  • Page 1 DVD-VIDEO PLAYER SERVICE MANUAL MODELS : DVX286/DV286/DV286K CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. JANUARY, 2007 P/N : AFN31629357...
  • Page 2 CONTENTS SECTION 1..SUMMARY SECTION 2..CABINET & MAIN CHASSIS SECTION 3..ELECTRICAL SECTION 4..MECHANISM (DP-11) SECTION 5..REPLACEMENT PARTS LIST...

  • Page 3: Table Of Contents

    SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR DVD PRODUCTS ....1-3 SERVICING PRECAUTIONS ..................1-4 • GENERAL SERVICING PRECAUTIONS • INSULATION CHECKING PRODEDURE • ELECTROSTATICALLY SENSITIVE (ES) DEVICES SERVICE INFORMATION FOR EEPROM..............1-5 SPECIFICATIONS .....................1-6...

  • Page 4: Product Safety Servicing Guidelines For Dvd Products

    PRODUCT SAFETY SERVICING GUIDELINES FOR DVD PRODUCTS CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY, NEVER SUBJECT : X-RADIATION PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURER’S 1.BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSONNEL APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE COVER THE SUBJECT OF X-RADIATION.

  • Page 5: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION : Before servicing the DVD covered by this service Electrostatically Sensitive (ES) Devices data and its supplements and addends, read and follow the Some semiconductor (solid state) devices can be damaged unforeseen easily by static electricity. Such components commonly are SAFETY PRECAUTIONS.

  • Page 6: Service Information For Eeprom

    SERVICE INFORMATION FOR EEPROM POWER ON DETECT NEW EEPROM DVD LOGO Status (NO Disk status) (OPTION EDIT SCREEN) MODEL : NAME Remotecontrol OPT 1 Pause key-->1-->4-->7-->2 in order. OPT 2 OPT 3 OPT 4 OPT 5 OPT 6 Press number 0~8, Press charater OPT 7 A~F (1~6 for a while) OPT 8...

  • Page 7: Specifications

    SPECIFICATIONS • GENERAL Power requirements : AC 200-240V , 50/60Hz Power consumption : Dimensions (Approx.) : 430 x 35 x 202mm (17 x 1.4 x 7.9inches) (W x H x D) without foot Net Weight (Approx.) : 1.9kg (4.2lbs) Operating temperature : 5°C to 35°C (41°F to 95°F) Operating humidity : 5% to 90%...
  • Page 8 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ........................2-2 1. CABINET AND MAIN FRAME SECTION .................2-2 2. DECK MECHANISM SECTION (DP-11) ...................2-3 3. PACKING ACCESSORY SECTION ..................2-4...

  • Page 9: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION OPTIONAL PART...

  • Page 10: Deck Mechanism Section (Dp-11)

    2. DECK MECHANISM SECTION (DP-11) 015B 015A 012A 012A...

  • Page 11: Packing Accessory Section

    3. PACKING ACCESSORY SECTION...
  • Page 12 SECTION 3 ELECTRICAL CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE ..............3-2 1. POWER CHECK FLOW ......................3-2 2. SYSTEM OPERATION FLOW....................3-3 3. SYSTEM TEST FLOW......................3-4 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGIBG ......3-10 1. SYSTEM 27MHZ CLOCK, RESET, FLASH R/W SIGNAL ...........3-10 2. SDRAM CLOCK ........................3-12 3.

  • Page 13: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER CHECK FLOW No 5V No 3.3VA. Is 3.3VA section working? Is 3.3VA section working? Is 5.6V present at collector Is 3.3V present at emitter No 3.3VA of Q126? of Q121? Replace Q126. Check FR101 Replace Q121. Is there a DC voltage at Check D105/D106/D107/ Cathode of D105 or D107?

  • Page 14: System Operation Flow

    2. SYSTEM OPERATION FLOW Power on 1. 8032 initializes SERVO,DSP & RISC registers 2. Write RISC code to SDRAM 3. Reset RISC Show LOGO Tray closed ? Tray close to closed position SLED at inner side ? SLED moves to inner position 1.

  • Page 15: System Test Flow

    3. SYSTEM TEST FLOW TEST Check the AC Voltage Replace power PCBA or AC transformer. Power PCBA(110V or 220V) Switch on the power PCBA Is the DC voltage outputs OK? Repair or Replace Power PCBA (5V, 3.3V, 12V, 5.6V MOTOR) Make sure the main PCBA don't short on VCCs and switch it on.
  • Page 16 RESET or Power on. Check connection lines between Flash memory Show LOGO? FLASH & MT1389E and the FLASH operates properly? access time whether is suitable or not. Check connection lines between SDRAM works properly? SDRAM & MT1389E and the SDRAM is damaged. MT1389E VIDEO Check the related outputs properly?
  • Page 17 Does the SLED move to inner Motor driver STBY Check the connection side when it is at outter position? pin is high? line of STBY signal. Is FMSO DC level Check the related higher than 1.4V? circuit of FMSO. SL+ and SL- output Check the amp circuit properly? on motor driver.
  • Page 18 Check the laser power circuit Laser turns on when LD01 or LD02 output on MT1389E and connecting reading disc? properly? to power transistor. Collector voltage of Check the related circuit on power transistor is OK? laser power transistor. Check cable connection between transistor ouput and pick-up head.
  • Page 19 Proper signals on Check connections between Focus on OK? A, B, C, D of MT1389E MT1389E and pick-up head. Check FEO signal Check the FOSO connection on MT1389E on MT1389E and motor driver. Check FOSO signal on MT1389E Normal TEO Signal Check the related Track on OK? on MT1389E?
  • Page 20 Normal Audio output Audio DAC received Check connection between when disc playback? correct data stream? MT1389E & audio DAC. Check the related Normal audio DAC out? circuit of audio DAC. Check audio filter, amplify, mute circuit. Communications between Normal IR.VFD & Front Check communication IR.VFD Front pannel key &...

  • Page 21: Details And Waveforms On System Test And Debuggibg

    DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGIBG 1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL 1) MT1389E main clock is at 27MHz (X601) FIG 1-1 2) MT1389E reset is low active 3.3V IC602 PWR_CTL RESET TIME FIG 1-2 3-10...
  • Page 22 3) RS232 waveforn during procedure (Downloading) FIG 1-3 4) Flash R/W enable signal during download (Downloading) IC602 FIG 1-4 3-11...

  • Page 23: Sdram Clock

    2. SDRAM CLOCK DCLK = 128MHz, Vp-p=2.2, Vmax=2.7V IC603 FIG 2-1 3. TRAY OPEN/CLOSE SIGNAL IC601 TRIN TROUT TRCLOSE TROPEN FIG 3-1 3-12...

  • Page 24: Sled Control Related Signal (No Disc Condition)

    4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) FMSO(1.9V/1.4V/1.1V) STBY(3.3V) SL+(4.2V/2.8V/1.2V) SL-(4.2V/2.8V/1.5V) FIG 4-1 5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) FOSO(1.5V/1.4V/1.3V) F+(3.2V/2.7V/2.2V) F-(3.2V/2.7V/2.2V) FIG 5-1 3-13...

  • Page 25: Laser Power Control Related Signal (No Disc Condition)

    6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) IC601 MDI1 (0V/180mV) LD02 (3.3V/2.3V) LD01 (3.3V/2.3V) FIG 6-1 7. DISC TYPE JUDGEMENT WAVEFORM CN201 IC601 FIG 7-1 (DVD) 3-14...
  • Page 26 FIG 7-2 (DVD) FIG 7-3 (CD) 3-15...

  • Page 27: Focus On Waveform

    FIG 7-4 (CD) 8. FOCUS ON WAVEFORM IC601 FOSO FIG 8-1 (DVD) 3-16...

  • Page 28: Spindle Control Waveform (No Disc Condition)

    FOSO FIG 8-2 (CD) 9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) DMSO (1.4V/1.8V) (3.6V/2.4V) (3.6V/4.8V) FIG 9-1 3-17...

  • Page 29: Tracking Control Related Signal (System Checking)

    10. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) IC601 TRSO FIG 10-1 (DVD) CN201 TRSO FIG 10-2 (CD) 3-18...

  • Page 30: Mt1389E Audio Optical And Coaxial Output (Spdif)

    11. MT1389E AUDIO OPTICAL AND COAXIAL OUTPUT (SPDIF) IC601 FIG 11-1 12. MT1389E VIDEO OUTPUT WAVEFORM 1) 100% FIG 12-1 3-19...

  • Page 31: Audio Output From Mt1389E

    2) COMPOSITE VIDEO SIGNAL FIG 12-2 13. AUDIO OUTPUT FROM MT1389E FIG 13-1 3-20...

  • Page 32: Connector Picture

    CONNECTOR PICTURE 1. FULL CONNECTOR PICTURE 3-21...

  • Page 33: Cn201 Connector Picture

    2. CN201 CONNECTOR PICTURE CN201(22PIN) 3. CN202 CONNECTOR PICTURE CN202 (9PIN) 3-22...

  • Page 34: Cn601 Connector Picture

    4. CN601 CONNECTOR PICTURE CN601 (12PIN) 5. CN602 CONNECTOR PICTURE CN602 (10PIN) 3-23...

  • Page 35: Cn605 Connector Picture

    6. CN605 CONNECTOR PICTURE CN605 (5PIN) 7. CN703 CONNECTOR PICTURE CN703 (12PIN) 3-24...

  • Page 36: Cn704 Connector Picture

    8. CN704 CONNECTOR PICTURE CN704 (9PIN) 9. P101 CONNECTOR PICTURE P101 (10PIN) 3-25...

  • Page 37: Block Diagrams

    BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM 3-26...

  • Page 38: Power Supply Block Diagram

    2. POWER SUPPLY BLOCK DIAGRAM 3-27...

  • Page 39: Servo Block Diagram

    3. SERVO BLOCK DIAGRAM 3-28...

  • Page 40: Mpeg & Memory Block Diagram

    4. MPEG & MEMORY BLOCK DIAGRAM 3-29...

  • Page 41: Video Block Diagram

    5. VIDEO BLOCK DIAGRAM 3-30...

  • Page 42: Audio Block Diagram

    6. AUDIO BLOCK DIAGRAM 3-31...
  • Page 43 MEMO 3-32...

  • Page 44: Circuit Diagrams

    BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter 1. POWER (SMPS) CIRCUIT DIAGRAM FROM THE LG CORPORATION. ALL COMPONENTS IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. SHOULD...

  • Page 45: System (Mpeg) Circuit Diagram

    2. SYSTEM (MPEG) CIRCUIT DIAGRAM 3-35 3-36...

  • Page 46: Servo Circuit Diagram

    3. SERVO CIRCUIT DIAGRAM 3-37 3-38...

  • Page 47: Av/Jack Circuit Diagram

    4. AV/JACK CIRCUIT DIAGRAM 3-39 3-40...

  • Page 48: Karaoke & Usb Circuit Diagram (8 & 9 Tool)

    5. KARAOKE & USB CIRCUIT DIAGRAM (8 & 9 TOOL) 3-41 3-42...

  • Page 49: Timer/Key Circuit Diagram (4 & 7 Tool)

    6. TIMER/KEY CIRCUIT DIAGRAM (4 & 7 TOOL) 3-43 3-44...

  • Page 50: Timer/Key Circuit Diagram (5 Tool)

    7. TIMER/KEY CIRCUIT DIAGRAM (5 TOOL) 3-45 3-46...

  • Page 51: Timer/Key Circuit Diagram (8 Tool)

    8. TIMER/KEY CIRCUIT DIAGRAM (8 TOOL) 3-47 3-48...

  • Page 52: Timer/Key Circuit Diagram (9 Tool)

    9. TIMER/KEY CIRCUIT DIAGRAM (9 TOOL) 3-49 3-50...

  • Page 53: Circuit Voltage Chart

    • CIRCUIT VOLTAGE CHART PIN NO. VOLTAGE PIN NO. VOLTAGE PIN NO. VOLTAGE PIN NO. VOLTAGE PIN NO. VOLTAGE PIN NO. VOLTAGE PIN NO. VOLTAGE PIN NO. VOLTAGE PIN NO. VOLTAGE IC201 0.965 1.869 3.259 1.945 3.281 IC602 1.36 0.968 1.950 0.391 3.282...

  • Page 54: Printed Circuit Diagrams

    PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-53 3-54...

  • Page 55: Key P.c.board

    2. KEY P.C.BOARD 3. TIMER P.C.BOARD 4. KARAOKE P.C.BOARD (KARAOKE MODEL ONLY) (4 TOOL) (4 TOOL) (4 TOOL) (5 TOOL) (5 TOOL) (5 TOOL) (7 TOOL) (7 TOOL) (7 TOOL) (8 TOOL) (8 TOOL) (8 TOOL) (9 TOOL, WITHOUT) (9 TOOL) (9 TOOL) 3-55 3-56...

  • Page 56: Smps P.c.board

    5. SMPS P.C.BOARD 6. SUB SCART (OPTIONAL PART) (430mm) 7. SUB 5.1CH (OPTIONAL PART) (430mm) 3-57 3-58...
  • Page 57 MEMO MEMO 3-59 3-60...
  • Page 58 SECTION 4 MECHANISM (DP-11) CONTENTS DECK MECHANISM PARTS LOCATIONS • TOP VIEW............................4-2 • TOP VIEW (WITHOUT TRAY DISC) ...................4-2 • BOTTOM VIEW ...........................4-2 DECK MECHANISM DISASSEMBLY 1. MAIN BASE ..........................4-3 1-1. Clamp Assembly Disc ......................4-3 1-1-1. Plate Clamp ......................4-3 1-1-2. Magnet Clamp ......................4-3 1-1-3.
  • Page 59 DECK MECHANISM PARTS LOCATION • TOP VIEW (WITHOUT TRAY) Procedure Disass Fig- Parts Fixing Type embly Starting No. Main Base Clamp Assembly Disc 1, 2 Plate Clamp 1, 2, 3 Magnet Clamp 1, 2, 3, 4 Clamp Upper Tray Disc 1, 6 Base Assembly Sled 4 Screws,...
  • Page 60 DECK MECHANISM DISASSEMBLY FIG. 4-1 FIG. 4-2 1. MAIN BASE (FIG. 4-1) 2. TRAY DISC (FIG. 4-2) 1-1. Clamp Assembly Disc 1) Insert and push a Driver in the emergency eject hole(A) at the right side, or put the Driver on the 1) Place the Clamp Assembly Disc as Fig.
  • Page 61 FIG. 4-3 3. BASE ASSEMBLY SLED (FIG. 4-3) 3-3. Gear Rack 1) Release the Scerw (S3) 1) Release 4 Screw (S2). 2) Disconnect the FFC Connector (C1) 4. RUBBER REAR (FIG. 4-3) 3-1. Gear Feed 3-2. Gear Middle...
  • Page 62 FIG. 4-4 5. FRAME ASSEMBLY UP/DOWN (FIG. 4-4) 8. GEAR LOADING (FIG. 4-4) 9. GUIDE UP/DOWN (FIG. 4-4) Note Put the Base Main face down (Bottom Side) 1) Move the Guide Up/Down in direction of 1) Release the screw (S4) arrow(A) as Fig.(A) 2) Unlock the Locking Tab (L3) in direction of arrow 2) Push the Locking Tab(L5) down and then lift up...
  • Page 63 MEMO...
  • Page 64 EXPLODED VIEW 1. DECK MECHANISM EXPLODED VIEW DP-11...
  • Page 65 MEMO MEMO 4-10...

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