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LG MBD62I Service Manual

Mini home theater system
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Internal Use Only
Website http://biz.lgservice.com
MINI HOME THEATER SYSTEM
SERVICE MANUAL
MODEL: MBD62I, MBS62V
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN35036930
SEPTEMBER, 2007

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  • Page 1 Internal Use Only Website http://biz.lgservice.com MINI HOME THEATER SYSTEM SERVICE MANUAL MODEL: MBD62I, MBS62V CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN35036930 SEPTEMBER, 2007...

  • Page 2: Table Of Contents

    2. OPEN / CLOSE WAVEFORM AT SECTION 4 POWER ON............3-23 3. STARTING ACTION WAVEFORM REPLACEMENT PARTS LIST ..4-1 IN MD DEVICE ..........3-23 4. FOCUS WAVEFORM ........3-24 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Servicing Precautions

    Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 4: Notes Regarding Compact Disc Player Repairs

    7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 5: Esd Precautions

    THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 6: Specifications

    Net Dimensions (WxHxD) 160 X 308 X 204mm Net Weight (1EA) 2.5kg Designs and specifications are subject to change without notice. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 MEMO LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Exploded Views

    SECTION 2 EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION CABLE3 IPOD CABLE2 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Deck Mechanism Section (Dp-12A)

    2. DECK MECHANISM SECTION (DP-12A) 015B 015A 012A LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Speaker Section (Mbs62V)

    3. SPEAKER SECTION (MBS62V) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Packing Accessory Section

    4. PACKING ACCESSORY SECTION Antenna Loop Battery Plug Ass'y, 1Way(BLACK) Antenna Remote control Instruction Ass'y 803A Packing Packing LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 12: Electrical Troubleshooting Guide Of Audio Part

    5V. IC101 KIA7042 KIA7042 Check IC100 78KO/KF2 Check if output voltage 1PIN power of IC101 KIA7042 is 4.3V Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Micom Part Check Ii

    19, 20, 59PIN 5V Check the working condition Replace the Check the X101: 32.768kHz related part. related parts X100: 9.8304MHz LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 14: Ic103 Ks4Cd21Cs Check

    Refer to MICOM 22 PIN DATA Check MICOM Troubleshooting 24 PIN CLK power 5V Check the Replace the related parts related part Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Fld Display Check

    Check Data output. 76PIN-->2PIN DO 78PIN-->1PIN 76PIN--> DO --> DATA input Check the FLD light on? Replace the related part related part LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 16: Pwm Modulation Part

    Check resistance Check IC604 PS9829 DATA input output of each LINE Check PWM MODULATOR output FL:75(+)74(-) FR:71(+)70(-) Check IC604 PS9829 part. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Power Amp Part Check

    4, 6, 14, 16PIN Check POWER IC 700 34, 29, 27, 20PIN output. Replace the related parts Check output LINE COIL LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 18: Portable Function

    Check IC801 Refer to SMPS (MC4580) 4PIN V (MC4580) 2, 6PIN input Troubleshooting. 8PIN V power. waveform. Replace the related parts. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Tv-Audio Function

    Check IC801 Check IC801 Refer to SMPS (MC4580) 4PIN V (MC4580) 2, 6PIN Troubleshooting. 8PIN V power waveform Replace the related parts. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 20: Tuner Function Check

    Check IC801 Refer to SMPS (MC4580) 4PIN VSS, (MC4580) 2, 6PIN input Troubleshooting. 8PIN VDD power waveform. Replace the related parts. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Smps Power Troubleshooting

    Is the D943 Normal? Replace the D943 Is the D941 Normal? Replace the D941 Power Line of Main PCB is short LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-10 Only for training and service purposes...
  • Page 22 IC947 1PIN? Check the P CTL “H” Is the IC947 4PIN “H”? signal from µ-com Check or Replace the IC947 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-11 Only for training and service purposes...
  • Page 23 Check or Replace the Q942 No VF+ Is the ZD950 Replace the ZD950 Normal? Replace the R993 or Q950, Q943 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-12 Only for training and service purposes...

  • Page 24: Bluetooh Part (Optional Part)

    Check IC801 Refer to SMPS (MC4580) 4PIN V (MC4580) 2, 6PIN input Troubleshooting. 8PIN V power waveform. Replace the related parts. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-13 Only for training and service purposes...

  • Page 25: Ipod Part (Optional Part)

    Check IC801 Refer to SMPS (MC4580) 4PIN V (MC4580) 2, 6PIN input Troubleshooting. 8PIN V power waveform. Replace the related parts. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-14 Only for training and service purposes...

  • Page 26: Electrical Troubleshooting Guide Of Dvd Part

    Time are appeared at Troubleshooting. P7905 (3, 5, 7, 9, FLD? 10PIN) Check DVD MD Module. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-15 Only for training and service purposes...

  • Page 27: Test & Debug Flow

    Check the tray control signals on P401 I/O PIN on IC401. are OK? Check the cable connection between DVD PCB and MD (MECHA) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-16 Only for training and service purposes...
  • Page 28 IC. Focus? Check the motor Proper driver (IC401). F+ & F- outputs? Check cable connection with pick-up head. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-17 Only for training and service purposes...
  • Page 29 SPIN+ & Check the SPINDLE control SPIN- output of motor driver. properly? Check the cable connection between P400 and MD LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-18 Only for training and service purposes...
  • Page 30 T+ & T- output on motor driver (IC401). properly? Check cable connection on pick-up head. Check RF signal Disc play? waveform. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-19 Only for training and service purposes...
  • Page 31 (Q411), output of video buffer ES8380 is OK? IC (IC407) and ES8380 video signal data TEST END LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-20 Only for training and service purposes...

  • Page 32: Usb Part

    (Check P5301) Check the USB DATA LINE. (P5301) Check the IC501 (ES8380). Check DATA LINE PIN 97 (USB-No), 98 (USB-Po) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-21 Only for training and service purposes...

  • Page 33: Waveforms

    1. RESET(DVD) 2. RX 3. TX 4. LCS3# (FLASH) Playing at USB function 1. HRST# 2. 5V 3. D- 4. D+ LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-22 Only for training and service purposes...

  • Page 34: Open / Close Waveform At Power On

    1.Limit SW 2.OPEN 3.CLOSE 3. STARTING ACTION WAVEFORM IN MD DEVICE 1.SLO (from MPEG) 2.SLED- 3.SLED+ (At Power on ) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-23 Only for training and service purposes...

  • Page 35: Focus Waveform

    4. FOCUS WAVEFORM 1.FDO 2.F+ 3.F- (INSERT CD ) (INSERT DVD ) 1.FDO 2.F+ 3.F- LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-24 Only for training and service purposes...

  • Page 36: At Power On, Spindle Signal At Md Deck

    3. Spin- 6. AT FIRST ACTION, FOCUS SIGNAL A, B, C, D 1. A 2. B 3. C 4. D Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-25 Only for training and service purposes...

  • Page 37: Tracking Signal

    7. TRACKING SIGNAL 1. Tro 2. Tr- 3. Tr+ 8. RF WAVEFORM LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-26 Only for training and service purposes...

  • Page 38: Disk Type Jugement Waveform

    9. DISK TYPE JUGEMENT WAVEFORM (DVD) 1. F+ 2. FDO 3. SVRRF (CD) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-27 Only for training and service purposes...

  • Page 39: Internal Block Diagram Of Ics

    Decimation AINL Filter Modulator LRCK SCLK Decimation AINR Filter Modulator Serial I/O SDTO Interface VCOM Voltage Reference CKS2 CKS1 CKS0 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-28 Only for training and service purposes...
  • Page 40 Audio Interface Format Pin “H”: 24bit I2S Compatible, “L”: 24bit MSB justified CKS2 Mode Select 2 Pin CKS0 Mode Select 0 Pin Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-29 Only for training and service purposes...

  • Page 41: Em639165

    B A 0 A 1 1 B A 1 A 1 0 (A P ) V D D V S S LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-30 Only for training and service purposes...
  • Page 42 Column Decoder REFRESH COUNTER 2 MX16 CELL ARRAY (BANK #C) Column Decoder 2 MX16 CELL ARRAY (BANK #D) Column Decoder Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-31 Only for training and service purposes...

  • Page 43: Es29Lv160E

    Machine RESET# Data Latch/ Sense Amps Sector Switches Y-Decoder Y-Decoder A<0:19> Cell Array X-Decoder Chip Enable Output Enable Logic BYTE# LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-32 Only for training and service purposes...
  • Page 44 3.0 volt-only single power supply (see Product Selector Guide for speed options and voltage supply tolerances) Device Ground Pin Not Connected Internally Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-33 Only for training and service purposes...

  • Page 45: Ht1000

    GND_B OC_ADJ OUT_B PVDD_B AGND BST_B VREG BST_C PVDD_C OUT_C GND_C PWM_C GND_D RESET_CD OUT_D PWM_D PVDD_D BST_D GVDD_C GVDD_D LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-34 Only for training and service purposes...
  • Page 46 35 V Hardwire Supply VREG OC Limit System Decoupling Power Supply Power Decoupling Supply GVDD (12 V)/VDD (12 V) 12 V Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-35 Only for training and service purposes...
  • Page 47 BTL/PBTL Configuration Pulldown Resistor GND_B GVDD_A BST_A PVDD_A Gate PWM_A Ctrl. Timing OUT_A Rcv. Drive BTL/PBTL Configuration Pulldown Resistor GND_A LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-36 Only for training and service purposes...

  • Page 48: Ip9009

    CH2 driver output(+) REOadj Adjustable regulator feedback VO1- CH1 driver output(-) REBadj Adjustable regulator control VO1+ CH1 driver output(+) BIAS Bias Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-37 Only for training and service purposes...

  • Page 49: Ks24L161

    V , the write function is enabled. Single power supply. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-38 Only for training and service purposes...

  • Page 50: Mc4580

    7. MC4580 7-1. PIN CONFIGURATION 7-2. TEST CIRCUIT 7-3. ABSOLUTE MAXIMUM RATINGS (TA=25°C) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-39 Only for training and service purposes...

  • Page 51: Ps9829B

    SO/SDA Host SCK/SCL Reset & Power Down Interface Internal Controls PWM_SWL_P/M SI/I2C_AD0 C, SPI) /CS/I2C_AD2 EPD_ENA EXT_MUTE Power Supply OVERLOAD LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-40 Only for training and service purposes...

  • Page 52: Pt6324

    SG1/KS1 SG20 SG2/KS2 SG19 SG 3KS3 SG18 SG4/KS4 16 17 18 1 9 20 21 22 23 24 25 26 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-41 Only for training and service purposes...
  • Page 53 SG16/KS16 SG17 SG18 SG19 SG20 SG21 SG22 SG23 SG24 Dimming Circuit Grid Driver GR10 GR11 GR12 GR13 GR14 GR15 GR16 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-42 Only for training and service purposes...
  • Page 54 SG17 to SG24 High-voltage segment output pins 26 to 33 GR1 to GR16 High-voltage grid output pins 34 to 49 Pull-down level Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-43 Only for training and service purposes...

  • Page 55: Str-A6252

    Power supply terminal Input of power supply for control circuit Drain terminal MOSFET drain / Input of Startup current LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-44 Only for training and service purposes...

  • Page 56: Μpd78F0546R (R)

    REGC P31/INTP2 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-45 Only for training and service purposes...
  • Page 57 ANI0/P20 to oscillator ANI7/P27 A/D converter Voltage REGC regulator FLMD0 RxD6/P14 (LINSEL) INTP0/P120 INTP1/P30 to INTP4/P33 Interrupt control INTP5/P16 INTP6/P140, INTP7/P141 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-46 Only for training and service purposes...
  • Page 58 Only for P64 to P67, use of an on-chip pull-up resistor P63 to P67 can be specified by a software setting. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-47 Only for training and service purposes...
  • Page 59 SCKA0 Use of an on-chip pull-up resistor can be specified P143 SIA0 by a software setting. P144 SOA0 P145 STB0 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-48 Only for training and service purposes...

  • Page 60: Wiring Diagram

    WIRING DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 3-49 3-50 LGE Internal Use Only Only for training and service purposes...

  • Page 61: Block Diagrams

    R & FI FILTER LTER -31. -31. 5V(VK 5V(VKK) FL1-FL2 FL1-FL2 (4. 5V) V) AC INPU NPUT FEED FEED BACK LGE Internal Use Only 3-51 3-52 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 62: Main & Front Block Diagram

    2. MAIN & FRONT BLOCK DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 3-53 3-54 LGE Internal Use Only Only for training and service purposes...

  • Page 63: Schematic Diagrams

    IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT. THE SET IS NOT DELAYED UNTIL THE NEW SERVICE SPECIAL COMPONENTS ARE SHADED ON THE LITERATURE IS PRINTED. LGE Internal Use Only 3-55 3-56 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 64: Main, Interface & Pwm Schematic Diagram

    2. MAIN, INTERFACE & PWM SCHEMATIC DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 3-57 3-58 LGE Internal Use Only Only for training and service purposes...

  • Page 65: Mpeg Schematic Diagram

    3. MPEG SCHEMATIC DIAGRAM LGE Internal Use Only 3-59 3-60 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 66: Servo Schematic Diagram

    4. SERVO SCHEMATIC DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 3-61 3-62 LGE Internal Use Only Only for training and service purposes...

  • Page 67: Interface Schematic Diagram

    5. INTERFACE SCHEMATIC DIAGRAM LGE Internal Use Only 3-63 3-64 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 68: Front Schematic Diagram

    6. FRONT SCHEMATIC DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 3-65 3-66 LGE Internal Use Only Only for training and service purposes...

  • Page 69: Front Mic Schematic Diagram

    7. FRONT MIC SCHEMATIC DIAGRAM LGE Internal Use Only 3-67 3-68 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 70: Ipod-1 Schematic Diagram (Option)

    8. IPOD-1 SCHEMATIC DIAGRAM (OPTION) Copyright © 2007 LG Electronics. Inc. All right reserved. 3-69 3-70 LGE Internal Use Only Only for training and service purposes...

  • Page 71: Ipod-2 Schematic Diagram (Option)

    9. IPOD-2 SCHEMATIC DIAGRAM (OPTION) LGE Internal Use Only 3-71 3-72 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 72: Channel Amp Schematic Diagram

    10. 2 CHANNEL AMP SCHEMATIC DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 3-73 3-74 LGE Internal Use Only Only for training and service purposes...

  • Page 73: Bluthooth Module Schematic Diagram (Option)

    11. BLUTHOOTH MODULE SCHEMATIC DIAGRAM (OPTION) LGE Internal Use Only 3-75 3-76 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 74: Circuit Voltage Chart

    IC801 IC502 8PIN 11.6V 37PIN 3.3V IC802 IC503 8PIN 4.99V 1PIN 3.25V RM301 3PIN 3.25V 3PIN 4.6V 9PIN 3.25V Copyright © 2007 LG Electronics. Inc. All right reserved. 3-77 3-78 LGE Internal Use Only Only for training and service purposes...

  • Page 75: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) LGE Internal Use Only 3-79 3-80 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 76 MAIN P.C.BOARD (BOTTOM VIEW) Copyright © 2007 LG Electronics. Inc. All right reserved. 3-81 3-82 LGE Internal Use Only Only for training and service purposes...

  • Page 77: Front P.c.board

    2. FRONT P.C.BOARD (TOP VIEW) (BOTTOM VIEW) LGE Internal Use Only 3-83 3-84 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 78: Smps P.c.board

    3. SMPS P.C.BOARD Copyright © 2007 LG Electronics. Inc. All right reserved. 3-85 3-86 LGE Internal Use Only Only for training and service purposes...

  • Page 79: Mic Jack P.c.board

    MEMO 4. MIC JACK P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 5. IPOD P.C.BOARD (OPTION) (TOP VIEW) (BOTTOM VIEW) LGE Internal Use Only 3-87 3-88 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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