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LG DK867 Service Manual

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Download this manual
Internal Use Only
Website http://biz.lgservice.com
DVD-VIDEO PLAYER
SERVICE MANUAL
MODEL: DK867/DK855/DK854/DV840
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN35874449
DECEMBER,2007

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Summary of Contents for LG DK867

  • Page 1 Internal Use Only Website http://biz.lgservice.com DVD-VIDEO PLAYER SERVICE MANUAL MODEL: DK867/DK855/DK854/DV840 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN35874449 DECEMBER,2007...
  • Page 2 CONTENTS SECTION 1..SUMMARY SECTION 2..CABINET & MAIN CHASSIS SECTION 3..ELECTRICAL SECTION 4..MECHANISM (DP-12V) SECTION 5..REPLACEMENT PARTS LIST Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Table Of Contents

    • GENERAL SERVICING PRECAUTIONS • INSULATION CHECKING PRODEDURE • ELECTROSTATICALLY SENSITIVE (ES) DEVICES THE PROCESS OF DISC DOWNLOAD ....................1-5 SPECIFICATIONS ............................1-7 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 4: Product Safety Servicing Guidelines For Dvd Products

    When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs.

  • Page 5: Servicing Precautions

    Note 1: Accessible Conductive Parts include Metal panels, electricity sufficient to damage an ES device.) Input terminals, Earphone jacks,etc. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 6: The Process Of Disc Download

    (NOTICE) You must add “MIS” at the end of model name If you don”t change the file name like that, Disc download isn”t be worked. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 11. After Disc download is completed, DVD-player turns off and then turns on automatically. 12.Do it again the process 1, 2, 3, 4 to confirm the version. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Specifications

    2.0Vrms (1kHz, 0dB), 600Ω, RCA jack (L, R) x 1 / Digital Output (Coaxial) 0.5V (p-p), 75Ω, RCA jack x 1 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 MEMO LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 10 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS .............................2-2 1. CABINET AND MAIN FRAME SECTION ....................2-2 2. DECK MECHANISM SECTION (DP-12V)....................2-3 3. PACKING ACCESSORY SECTION......................2-4 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION OPTIONAL PARTS LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 12: Deck Mechanism Section (Dp-12V)

    2. DECK MECHANISM SECTION (DP-12V) 015B 015A Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Packing Accessory Section

    820 Plug Ass'y 1way(Black) 808 Battery 801 Owner's Manual 900 Remocon 804 Packing Sheet 803 Packing 803 Packing 802 Box Carton LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 3. 5.1CH & SCART P.C.BOARD (OPTIONAL PART)................3-57 4. KARAOKE & USB P.C.BOARD (OPTIONAL PART) ................3-59 5. KEY P.C.BOARD ...........................3-63 6. TIMER P.C.BOARD ..........................3-63 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Electrical Troubleshooting Guide

    Replace the D123 Is the D123 normal? Replace the D125 Is the D125 normal? Power Line of Main PCB(DVD) is short LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 16 Is the Vcc(=12V) • Check the ‘PWR CTL “H”’ • supplied to Q126 signal from µ-com Base? Check or Replace the Q123 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Power Check Flow

    Check FR101 Replace Q121. Is there a DC voltage at Check D105/D106/D107/ cathode of D105 or D107? D108 and replace. Replace IC101. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 18: System Operation Flow

    2. System operation routine loop 1. Stop playback & open Tray 2. Display tray open message & LOGO Receive CLOSE Key? Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: System Test Flow

    3. Check FLASH R/W enable signal PRD, Update FLASH RWR. successfully? 4. Check RS232 SIGNALS. 5. Check FLASH Memory related circuit. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 Check the Tray control FAN_TRAY+ & FAN_ amplifying circuit on Motor driver. TRAY- signal? Check the cable connection between main PCBA and loader. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 Proper Check the amp circuit on FCS+ & FCS- motor driver. outputs? Check cable connect on with pick-up head. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 22 Check the spindle control & FAN_SPN- output amp circuit of motor driver properly? Check the cable connection between spindle and main PCBA. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 TRK- output properly? amp circuit on motor driver Check cable connection on pick-up head. Check RF signal waveform. Disc is play? LGE Internal Use Only 3-10 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 IR.VFD Front panel key lines on MT1389L. panel key & MT1389Lis functions? normally? Check the cable connection TEST END on Front panel. Copyright © 2008 LG Electronics. Inc. All right reserved. 3-11 LGE Internal Use Only Only for training and service purposes...

  • Page 25: Details And Waveforms On System Test And Debugging

    1) MT1389L main clock is at 27MHz (X601) FIG 1-1 2) MT1389L reset is active high. 3.3VA PWR_CTL RESET FIG 1-2 LGE Internal Use Only 3-12 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 3) RS232 waveform during procedure (Downloading) FIG 1-3 4) Flash CE# enable signal and SCK signal during Downloading IC602 FIG 1-4 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-13 LGE Internal Use Only Only for training and service purposes...

  • Page 27: Sdram Clock

    2. SDRAM CLOCK DCLK = 128MHz, Vp-p=2.2, Vmax=2.7V IC603 FIG 2-1 3. TRAY OPEN/CLOSE SIGNAL CLOSE_SW OPEN_SW IC201 CLOSE OPEN FIG 3-1 LGE Internal Use Only 3-14 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 28: Sled Control Related Signal (No Disc Condition)

    4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) SLD_PWM(1.9V/1.4V/1.1V) DR_MUTE(3.3V) FAN_SLD+(4.2V/2.8V/1.2V) FAN_SLD-(4.2V/2.8V/1.5V) FIG 4-1 5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) FOD(1.8V/1.65V/1.5V) FCS+(3.5V/2.8V/2.0V) FCS-(3.3V/2.7V/1.5V) FIG 5-1 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-15 LGE Internal Use Only Only for training and service purposes...

  • Page 29: Laser Power Control Related Signal (No Disc Condition)

    6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) CN201 MDI1(0V/180mV) DVD_LD(3.3V/2.3V) CD_LD(3.3V/2.3V) FIG 6-1 7. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) SPD_PWM(1.65V/0.3V) FAN_SPN-(4.5V/2.8V) FAN_SPN+(1V/2.8V) FIG 7-1 LGE Internal Use Only 3-16 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 30: Focus On Waveform

    8. FOCUS ON WAVEFORM IC201 FCS+ FCS- FIG 8-1 (DVD) FCS+ FCS- FIG 8-2 (CD) Copyright © 2008 LG Electronics. Inc. All right reserved. 3-17 LGE Internal Use Only Only for training and service purposes...

  • Page 31: Tracking Control Related Signal (System Checking)

    9. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) TRK+ TRK- FIG 9-1 (DVD) TRK+ TRK- FIG 9-2 (CD) LGE Internal Use Only 3-18 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 32: Mt1389L Audio Coaxial Output (Spdif)

    10. MT1389L AUDIO COAXIAL OUTPUT (SPDIF) FIG 10-1 11. MT1389L VIDEO OUTPUT WAVEFORM 1) 100% COLOR BAR FIG 11-1 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-19 LGE Internal Use Only Only for training and service purposes...

  • Page 33: Audio Output From Mt1389L

    2) COMPOSITE VIDEO SIGNAL FIG 11-2 12. AUDIO OUTPUT FROM MT1389L FIG 12-1 LGE Internal Use Only 3-20 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 34: Connector Picture

    CONNECTOR PICTURE 1. ALL CONNECTOR PICTURE Copyright © 2008 LG Electronics. Inc. All right reserved. 3-21 LGE Internal Use Only Only for training and service purposes...

  • Page 35: Cn201 Connector Picture

    2. CN201 CONNECTOR PICTURE CN201 (MD 23PIN) 3. CN202 CONNECTOR PICTURE CN202 (MD 9PIN) LGE Internal Use Only 3-22 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 36: Cn601 Connector Picture

    4. CN601 CONNECTOR PICTURE CN601 (FP 12PIN) 5. CN602 CONNECTOR PICTURE CN602 (POWER 10PIN) Copyright © 2008 LG Electronics. Inc. All right reserved. 3-23 LGE Internal Use Only Only for training and service purposes...

  • Page 37: Cn605 Connector Picture

    6. CN605 CONNECTOR PICTURE CN605 (KARAOKE 4PIN) 7. CN701 CONNECTOR PICTURE CN701 (SCART 12PIN) LGE Internal Use Only 3-24 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 38: Block Diagrams

    BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM Pr/R Pb/B/SC Y/G/SY CVBS RESET FP CLK FP STB FP DATA Copyright © 2008 LG Electronics. Inc. All right reserved. 3-25 LGE Internal Use Only Only for training and service purposes...

  • Page 39: Power (Smps) Block Diagram

    2. POWER (SMPS) BLOCK DIAGRAM TRANS SWITCHING IC AC100~240V RECTIFIER FILTER LGE Internal Use Only 3-26 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 40: System Block Diagram

    3. SYSTEM BLOCK DIAGRAM Y_G_OUT SCK, Hold CVBS SO,CE, WP R_SY_OU T B_SC_ OUT RESET D_MUTE IR RCV POWER_KEY FP_CLK FP_STB FP_DATA Copyright © 2008 LG Electronics. Inc. All right reserved. 3-27 LGE Internal Use Only Only for training and service purposes...

  • Page 41: Servo Block Diagram

    4. SERVO BLOCK DIAGRAM LGE Internal Use Only 3-28 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 42: Video Block Diagram

    5. VIDEO BLOCK DIAGRAM Copyright © 2008 LG Electronics. Inc. All right reserved. 3-29 LGE Internal Use Only Only for training and service purposes...

  • Page 43: Audio Block Diagram

    6. AUDIO BLOCK DIAGRAM LGE Internal Use Only 3-30 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 44: Circuit Diagrams

    D121 or D122 are Defective No Power FR101 is Defective 3.3V No Power Q121 is Defective Switching Error IC102,IC103 are Defective 3-31 3-32 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: System (Mpeg) Circuit Diagram

    2. SYSTEM (MPEG) CIRCUIT DIAGRAM 3-33 3-34 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 46: Servo Circuit Diagram

    3. SERVO CIRCUIT DIAGRAM 3-35 3-36 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 47: Av (Jack) Circuit Diagram

    4. AV (JACK) CIRCUIT DIAGRAM 3-37 3-38 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 48: 1Ch Circuit Diagram (Option)

    5. 5.1CH CIRCUIT DIAGRAM (OPTION) 3-39 3-40 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 49: Karaoke & Usb Circuit Diagram (Option)

    6. KARAOKE & USB CIRCUIT DIAGRAM (OPTION) 3-41 3-42 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 50: Key Circuit Diagram

    7. KEY CIRCUIT DIAGRAM 3-43 3-44 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 51: Timer Circuit Diagram

    8. TIMER CIRCUIT DIAGRAM 8-1. 4 TOOL 3-45 3-46 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 52 8-2. 5 TOOL 3-47 3-48 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 8-3. 8 TOOL 3-49 3-50 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 54 8-4. 9 TOOL 3-51 3-52 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 55: Circuit Voltage Chart

    3.305 3.287 3.288 2.191 3.254 3.247 IC602 1.015 0.551 1.404 1.47 3.064 3.057 0.215 0.282 0.997 0.59 0.014 0.013 3-53 3-54 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 56: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-55 3-56 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 57: Power (Smps) P.c.board

    2. POWER (SMPS) P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3. 5.1CH & SCART P.C.BOARD (OPTIONAL PART) (TOP VIEW) (BOTTOM VIEW) 3-57 3-58 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 58: Karaoke & Usb P.c.board (Optional Part)

    4. KARAOKE & USB P.C.BOARD (OPTIONAL PART) 4-1. 4 TOOL (BOTTOM VIEW) (TOP VIEW) 4-2. 5 TOOL (BOTTOM VIEW) (TOP VIEW) 3-59 3-60 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 4-3. 8 TOOL (BOTTOM VIEW) (TOP VIEW) 4-4. 9 TOOL (BOTTOM VIEW) (TOP VIEW) 3-61 3-62 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 60: Key P.c.board

    (TOP VIEW) (BOTTOM VIEW) (BOTTOM VIEW) 5-2. 5 TOOL 6-2. 5 TOOL (TOP VIEW) (TOP VIEW) (BOTTOM VIEW) (BOTTOM VIEW) 3-63 3-64 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 (TOP VIEW) (BOTTOM VIEW) (BOTTOM VIEW) 5-4. 9 TOOL 6-4. 9 TOOL (TOP VIEW) (TOP VIEW) (BOTTOM VIEW) (BOTTOM VIEW) 3-65 3-66 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 62 8. Gear Loading .......................4-5 9. Guide Up/Down ......................4-5 10. PWB Assembly Loading...................4-5 11. Base Main........................4-5 EXPLODED VIEW 1. Deck Mechanism Exploded View ................4-7 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 63: Deck Mechanism Parts Locations

    When reassembling, perform the procedure in reverse order. The “Bottom” on Disassembly column of above Table indicates the part should be disassembled at the Bottom side. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 64: Deck Mechanism Disassembly

    1) Turn the Plate Clamp to counterclockwise direction and then lift up the Plate Clamp. 1-1-2. Magnet Clamp 1-1-3. Clamp Upper Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 65: Base Assembly Sled

    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 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 66: Frame Assembly Up/Down

    Gear Pulley from PWB Assembly Loading from the Base Main. the Base Main 11. BASE MAIN (FIG. 4-4) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 67 MEMO LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 68: Exploded View

    EXPLODED VIEW 1. DECK MECHANISM EXPLODED VIEW DP-12V 015B 015A Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 MEMO MEMO LGE Internal Use Only 4-10 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

This manual is also suitable for:

Dk855Dk854Dv840

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