LG MDD105 Service Manual
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LG MDD105 Service Manual

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See also: Owner's Manual
Internal Use Only
Website http://biz.lgservice.com
DVD Mini Hi-Fi System
SERVICE MANUAL
MODEL: MDD105
(MDS105V)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN73972690
JUNE, 2010

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Summary of Contents for LG MDD105

  • Page 1 Internal Use Only Website http://biz.lgservice.com DVD Mini Hi-Fi System SERVICE MANUAL MODEL: MDD105 (MDS105V) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN73972690 JUNE, 2010...
  • Page 2 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...

  • Page 3: Table Of Contents

    SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS ........................1-3 ESD PRECAUTIONS ..........................1-5 SERVICE INFORMATION FOR EEPROM ..................1-6 SOFTWARE UPGRADE PROCESS ..................... 1-7 SPECIFICATIONS ............................1-8...

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. 2.
  • Page 5 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

  • Page 6: Esd Precautions

    ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

  • Page 7: Service Information For Eeprom

    SERVICE INFORMATION FOR EEPROM POWER ON FLD no disc status Remote control ‘2’ + Front ‘STOP’ DETECT NEW EEPROM (OPTION EDIT SCREEN) push same timing during 5s NAME OPT 0 FLD ‘OP-0…. OPT 1 OPT 2 OPT 3 OPT 4 Move to appropriate position OPT 5 and make changes...

  • Page 8: Software Upgrade Process

    SOFTWARE UPGRADE PROCESS Important Notice : When ugrade the software running. Do not shunt down the power, it tmay damage the unit. 1. MICOM UPGRADE 1) Copy the software file into USB flash, as the file name is LG_MDD105_XXXXXXX.HE 2) Insert the USB flash into USB host. 3) Set Function to USB position.

  • Page 9: Specifications

    SPECIFICATIONS • GENERAL Power supply Refer to main label. Power consumption Refer to main label. Net Weight 5.3 kg External dimensions (W x H x D) ( 272 x 336 x 352 ) mm Operating conditions Temperature 5 °C to 35 °C, Operation status: Horizontal Operating humidity 5 % to 85 % Laser...
  • Page 10 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ............................. 2-3 1. CABINET AND MAIN FRAME SECTION (MDD105) ................2-3 2. TAPE DECK MECHANISM SECTION ...................... 2-5 3. SPEAKER SECTION ..........................2-7 4. PACKING ACCESSORY SECTION ......................2-8...
  • Page 11 MEMO...

  • Page 12: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION (MDD105) 263L 264L 263R KEY3 266L A41A 264R 267L 266R CABLE3 267R MAIN KEY2 A41L KEY1 A41R CABLE2 CABLE1 SMPS...

  • Page 13: Tape Deck Mechanism Section

    2. TAPE DECK MECHANISM SECTION...

  • Page 14: Speaker Section

    3. SPEAKER SECTION • LEFT / RIGHT SPEAKER (MDS105V)

  • Page 15: Packing Accessory Section

    4. PACKING ACCESSORY SECTION 824 AM antenna 825 FM antenna Battery Remote controller Instruction Ass'y 803T Packing 803B Packing...
  • Page 16 SECTION 3 ELECTRICAL CONTENTS ONE POINT REPAIR INSTRUCTION ....................3-2 1. NO POWER PROBLEM ......................... 3-2 2. VFD DOESN'T DISPLAY ........................3-4 3. THE DISC TRAY DOESN'T WORK ....................... 3-5 4. NO BOOTING WHEN YOU TURN THE UNIT ON ................3-9 5.

  • Page 17: One Point Repair Instruction

    ONE POINT REPAIR INSTRUCTION 1. NO POWER PROBLEM No power problem occurs when you power on the unit. 1-1. F1, D3 and D6 1-1-1. Solution Replace F1, D3, D6 on SMPS board. 1-1-2. How to troubleshoot (Countermeasure) 1) Look at the physical of fuse F1. 2) Check the bridge diode of D3, D6.
  • Page 18 ONE POINT REPAIR INSTRUCTION No power problem occurs when you power on the unit. 1-2. C29 and C30 1-2-1. Solution Replace C29, C30 on SMPS board. 1-2-2. How to troubleshoot (Countermeasure) 1) Check all of voltage. W4 Jumper LTV-817 Jumper 2.7k EER2828(AMP) 470pF/1kV...

  • Page 19: Vfd Doesn't Display

    ONE POINT REPAIR INSTRUCTION 2. VFD DOESN'T DISPLAY Timer doesn't work(abnormal display). 2-1. D13 2-1-1. Solution Replace D13 on SMPS board. 2-1-2. How to troubleshoot (Countermeasure) 1) Check J1 pin3 -26 V at power. W1 Jumper uF/50V 22uH U1 78R05 Jumper 8.GND 7.CD_CTRL...

  • Page 20: The Disc Tray Doesn't Work

    ONE POINT REPAIR INSTRUCTION 3. THE DISC TRAY DOESN'T WORK When you turn on the set, the disc tray won't work. 3-1. U1 3-1-1. Solution Replace U1_KA78R05 on SMPS board. 3-1-2. How to troubleshoot (Countermeasure) 1) Check all of voltage. 2) 5 V unnormal.
  • Page 21 ONE POINT REPAIR INSTRUCTION When you turn on the set, the disc tray won't work. 3-2. U4 and D8 3-2-1. Solution Replace U4_278R33 and D8 on SMPS board. 3-2-2. How to troubleshoot (Countermeasure) 1) Check all of voltage. 2) 3.3 V abnormal. W7 Jumper D4 SR306 1000uF/16V...
  • Page 22 ONE POINT REPAIR INSTRUCTION When you turn on the set, the disc tray won't work. 3-3. IC401 3-3-1. Solution Replace IC401_IP9011 on main board. 3-3-2. How to troubleshoot (Countermeasure) 1) Check 5 VM voltage. 2) Check IC401 pin15,16,17,18 1.5 V? 3) All of normal, please check R404,R444,R424,R410, also replace IC401.
  • Page 23 ONE POINT REPAIR INSTRUCTION When you turn on the set, the disc tray won't work. 3-4. IC1 3-4-1. Solution Replace IC1 ESS8390 on main board. 3-4-2. How to troubleshoot (Countermeasure) 1) Check 5 V CD voltage. 2) Check 3.3 V. 3) Check X501, X100.

  • Page 24: No Booting When You Turn The Unit On

    ONE POINT REPAIR INSTRUCTION 4. NO BOOTING WHEN YOU TURN THE UNIT ON When you turn on the set, it will show 'welcome' message continuously on the front panel. And it will not boot-up normally. 4-1. IC503(W25Q16A), IC3(SN74LV00A) 4-1-1. Solution Replace IC503,IC3 on main board.
  • Page 25 ONE POINT REPAIR INSTRUCTION When you turn on the set, it will show 'welcome' message continuously on the front panel. And it will not boot-up normally. 4-2. IC100 (LC87F5NC8A) 4-2-1. Solution Replace IC100 on main board. 4-2-2. How to troubleshoot (Countermeasure) 1) If 3.3 V haven't on main board of P1, please check P-SENS 5V come out or not? Please check D1 or replace D1 on SMPS.
  • Page 26 ONE POINT REPAIR INSTRUCTION When you turn on the set, it will show 'welcome' message continuously on the front panel. And it will not boot-up normally. 4-3. X100 4-3-1. Solution Replace X100_9.8304 MHz on main board. 4-3-2. How to troubleshoot (Countermeasure) 1) If 5.6 V normal? Please check D101, D102.
  • Page 27 ONE POINT REPAIR INSTRUCTION When you turn on the set, it will show 'welcome' message continuously on the front panel. And it will not boot-up normally. 4-4. X101 4-4-1. Solution Replace X101_32.768 kHz on main board. 4-4-2. How to troubleshoot (Countermeasure) 1) If 5.6 V normal? Please check D102, D102.

  • Page 28: Speaker No Output When You Turn The Unit On

    ONE POINT REPAIR INSTRUCTION 5. SPEAKER NO OUTPUT WHEN YOU TURN THE UNIT ON When you turn on the SET, it will show 'welcome' message continuously on the front panel. And speaker have noise output. 5-1. IC604 5-1-1. Solution Replace IC604_PS9831 on main board. 5-1-2.
  • Page 29 ONE POINT REPAIR INSTRUCTION When you turn on the SET, it will show 'welcome' message continuously on the front panel. And speaker have noise output. 5-2. IC700, IC701 5-2-1. Solution Replace IC700, IC701 on main board. 5-2-2. How to troubleshoot (Countermeasure) 1) Check +12 V, +36 V.

  • Page 30: Vfd Haven't Show When You Turn The Unit On

    ONE POINT REPAIR INSTRUCTION 6. VFD HAVEN'T SHOW WHEN YOU TURN THE UNIT ON When you turn on the SET, it will show 'welcome' message continuously on the front panel. And speaker have noise output. 6-1. U901 (PT6324) 6-1-1. Solution Replace PT6324 on VFD display board.

  • Page 31: Major Waveforms

    MAJOR WAVEFORMS 1. IC1 MICOM INTERFACE WAVEFORM 1) During power on 2) During normal play IC1 Pin33 DVD_CE IC1 Pin33 DVD_CE IC1 Pin72 RESET IC1 Pin72 RESET IC1 Pin34 DVD_DO IC1 Pin34 DVD_DO IC1 Pin35 DVD_DI IC1 Pin35 DVD_DI FIG. 1-1 FIG.

  • Page 32: Ic100 Micom Interface Waveform

    2. IC100 MICOM INTERFACE WAVEFORM 1) During power on 2) During normal play IC100 Pin25 DVD_CLK IC100 Pin25 DVD_CLK IC100 Pin29 DVD_RST IC100 Pin29 DVD_RST FIG. 2-1 FIG. 2-2 0_DSP_RST TP112 BQ_STB IC100 0_BQ_STB LC87F5NC8A 0_ADC_RST BQ_RST TP210 0_BQ_RST PWM_RST 0_PWM_RST TP211 VOL_A...

  • Page 33: Sled Drive And Motor Waveform

    3. SLED DRIVE AND MOTOR WAVEFORM 1) When focus search 2) During normal play IC401 Pin18 SLED+ IC401 Pin18 SLED+ IC401 Pin15 SPIN+ IC401 Pin15 SPIN+ FIG. 3-1 FIG. 3-2 C402 TURD_N+ DO6- SPINDLBD SPINDLBD TURD_N- CD_DVD_SLCT DO6+ CD_DVD_SLCT TURO+ DRV_MUTE FWD5 DRV_MUTE...

  • Page 34: Spindle Drive And Motor Waveform

    4. SPINDLE DRIVE AND MOTOR WAVEFORM 1) When focus search failed or there is no disc on tray IC401 Pin6 FOD IC401 Pin3 F+ FIG. 4-1 DO1- DO1+ DO2- DO2+ C419 473P R444 R447 VCC1 IC401 C409 IP9011 C414 R422 R404 C421 C425...

  • Page 35: Rf, Focus And Tracking Error Waveform

    5. RF, FOCUS AND TRACKING ERROR WAVEFORM 1) During normal play 2) When TOC reading IC1 Pin136 RF IC1 Pin136 RF IC1 Pin120 TE IC1 Pin120 TE IC1 Pin121 FE IC1 Pin121 FE FIG. 5-1 FIG. 5-2 FB2500 100uF 4.7K REFD C508 C5C9...

  • Page 36: Wiring Diagram

    3 DISC DVD DECK CMS-S79RFVC MAIN PCB TO MIC PCB MAIN PCB TO LOGIC DECK FFC 9P MDD105 SMPS_100W SMPS PCB TO MAIN PCB MAIN PCB TO KEY3 PCB MAIN PCB TO DISPLAY PCB LOGIC DECK DISPLAY PCB TO KEY1 PCB...

  • Page 37: Block Diagram

    Tuner D4558 Module HP Amp S4308 YST996 Mic Amp ALC KEY0,KEY1,KEY2 D+, D- P Cont CRP42602 PT6324 Front MDD105 SMPS LOGIC DECK R / Key L / Key MULTI VOLTAGE USB Host Jack Jack DISPLAY Control Control DRIVER Control 3-23...

  • Page 38: Circuit Diagrams

    MODIFIED OR ALTERED WITHOUT PERMISSION IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. FROM THE LG CORPORATION. ALL COMPONENTS PERFORMANCE IMPROVEMENT CHANGES INTO SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL THE SET IS NOT DELAYED UNTIL THE NEW SERVICE TO THOSE IN THE ORIGINAL CIRCUIT.

  • Page 39: Main - Dvd Mpeg Circuit Diagram

    R2C0 R229 T+20 KDS226 470uF R600 T+24 COREVCC DGND DVDD ADDATA USB_P 100uF +3.3VD IC201 R2A8 R2A9 R151 WM8738 470uF ADMCLK 103P C266 C265 C267 R175 100R ADLRCK 100P 100P 104P LG-MDT355/MDD265/MDD65/MDD105 MAIN BOARD DVD MPEG(ESS8390) (2010. 06.14) 3-27 3-28...

  • Page 40: Main - Mcu Circuit Diagram

    820P 100K(27K) R816 FB800 C809 R813 R805 R811 FB600 4.7uF 470R C807 220P FB601 R815 R834 R838 FB2K7 -12VA +12VA +3.3VD R897 X(10K) 820P +5VM C834 FB901 104P C836 100uF -12VA LG-MDT355/MDD265/MDD65/MDD105 TUN800 MAIN BOARD MCU (2010. 06.14) 3-29 3-30...

  • Page 41: Main - Servo Circuit Diagram

    IN_SW CL SW C612 R481 2R2(X) C434 104P(X) C617 LOAD- 100uF 104P LOAD+ R484 R488 PHOTO SENSOR D_SENSE R483 R406 100R TURD_N- TUR_N- TURD_N+ TUR_N+ L402 C437 C433 FB2500 104P 104P BUS-RF LG-MDT355/MDD265/MDD65/MDD105 MAIN BOARD SERVO (2010. 06.14) 3-31 3-32...

  • Page 42: Main - D/Ac Circuit Diagram

    D604 VSSA RESET R638 100K C605 C606 R648 R649 1SS355 C609 104P R639 C690 330P 330P 220K 0.1uF Q601 BUS-DAC C9014 STROBE R664 R662 R641 IC601 100R R668 XX(MSGEQ7N(FO)) 100K C610 102P LG-MDT355/MDD265/MDD65/MDD105 MAIN BOARD D/AC (2010. 06.14) 3-33 3-34...

  • Page 43: Main - Amp Circuit Diagram

    6. MAIN - AMP CIRCUIT DIAGRAM JK701 MDT355 IC700 (TAS5342A) IC701(TAS5342A) MDD265 IC700 (TAS5352A) IC700(NC) WOOFER PART NC MDD105 IC700 (TAS5342LA) IC700(NC) WOOFER PART NC C703 470uF/35V L714 L707,L708,L709,L710 15uH/4A 22UH L706 L705 2.1 CH_SUBWOOFER OPTION R733 C7G5 C7G6 R741...

  • Page 44: Audio Deck System Circuit Diagram

    10uF/25V 270P FB204 REC_MUTE FB2K7 R255 R256 R213 1000P Q202 C241 9014 R252 10/50 R257 R254 C249 9015C 100/16 C150 R276 100/16 C252 220K 47/16 C298 C296 0.47uF 0.47uF 10/35 47/16 9015C LG-MDT355/MDD265/MDD65/MDD105 AUTO DECK SYSTEM (2010. 06.14) 3-37 3-38...

  • Page 45: Mic / Usb / Key / Vfd Circuit Diagram

    FB223 CN904 R946 USB SOCKET USB_GND2 FB905 HNA-15MM40T R942 HP-SENS USB_VCC SW918 FB904 3.3uH SW921 HP-L CLOCK AGND LG EQ FB903 C919 R945 HP-R R941 220U/10V R905 USB_GND C904 3.3uH SW917 100K SW922 TO MAIN PCB ESS TIMER R940 USER EQ...

  • Page 46: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART TEST TEST TEST TEST TEST TEST TEST TEST PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. VOLTAGE(V) VOLTAGE(V) VOLTAGE(V) VOLTAGE(V) VOLTAGE(V) VOLTAGE(V) VOLTAGE(V) VOLTAGE(V) IC1_ESS8390 4.74 0.01 1.61 1.92 3.15 3.28 2.24...
  • Page 47 MEMO TEST TEST TEST PIN NO. PIN NO. PIN NO. VOLTAGE(V) VOLTAGE(V) VOLTAGE(V) 3.15 0.01 0.38 3.15 6.51 1.58 0.01 4.85 -25.1 1.58 0.01 -25.1 1.12 U203_BA3308 -25.1 1.58 -25.1 6.30mV -25.1 3.21 1.56 -25.1 -25.1 3.25 -25.1 7.12 -25.1 1.58 1.56 -25.1...

  • Page 48: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) 3-45 3-46...
  • Page 49 MAIN P.C.BOARD (BOTTOM VIEW) 3-47 3-48...

  • Page 50: Smps P.c.board

    2. SMPS P.C.BOARD NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 3-49 3-50...

  • Page 51: Front P.c.board

    3. FRONT P.C.BOARD 3-51 3-52...

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