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LG SoundPlate LAP250H Service Manual
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LG SoundPlate LAP250H Service Manual

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Internal Use Only
Website http://biz.lgservice.com
SoundPlate
SERVICE MANUAL
MODEL: LAP250H
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN76552488
JANUARY, 2015

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  • Page 1 Internal Use Only Website http://biz.lgservice.com SoundPlate SERVICE MANUAL MODEL: LAP250H CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN76552488 JANUARY, 2015...
  • Page 2 CONTENTS SECTION 1 ..GENERAL SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...
  • Page 3 SECTION 1 GENERAL CONTENTS ESD PRECAUTIONS ............................1-3 HIDDEN KEY MODE ............................1-4 MCS/ EQ PROGRAM UPDATE GUIDE ......................1-5 SPECIFICATIONS ............................. 1-6...

  • Page 4: 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 5: Hidden Key Mode

    HIDDEN KEY MODE HIDDEN MODE KEYS EEPROM CLEAR (Initialize) Main set ‘-’ (Volume) + Remote control ‘SOUND EFFECT’ VERSION CHECK Main set ‘-’ (Volume) + Remote control ‘Play’ REPEAT (Up) DOWN Stop/Ok (Down) RIGHT F.Skip (Right) LEFT B.Skip (Left) ENTER Play/Pause (Enter) Main set “VOL MIN”...

  • Page 6: Mcs/ Eq Program Update Guide

    MCS/ EQ PROGRAM UPDATE GUIDE 1. Preparation - Remote control. - Do format USB Memory to FAT32 File system. - USB : Update fi le exist only in the USB Memory stick. Ex ) LAP250H :  E:\PG540_FW_LAP250H_Ver.bin (if UBS driver is E:\) ...

  • Page 7: Specifications

    SPECIFICATIONS • GENERAL (LAP250H) Power requirements 120 V ~ 60 Hz Power consumption 20 W Networked standby : 1.5 W (If all network ports are activated.) Dimensions (W x H x D) 530 mm x 60 mm x 350 mm (20.9 inch x 2.4 inch x 13.8 inch) Net Weight (Approx.) 5.3 kg (11.7 lb)
  • Page 8 SECTION 2 CABINET & MAIN CHASSIS CONTENTS PANEL DISASSEMBLY INSTRUCTIONS ......................2-2 EXPLODED VIEWS ............................2-3 1. CABINET AND MAIN FRAME SECTION ....................2-3 2. PACKING ACCESSORY SECTION ......................2-5...

  • Page 9: Panel Disassembly Instructions

    PANEL DISASSEMBLY INSTRUCTIONS 1. Please use a tool such as Fig-1. < Fig - 1. > 2. Panel disassembly in accordance with four hole criteria. < Fig - 2. >...

  • Page 10: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION CABLE1 MAIN SMPS...

  • Page 11: Packing Accessory Section

    2. PACKING ACCESSORY SECTION OPTIONAL PART 801 Owner’s manual 808 Battery 820 USB extension cable 806 Optical cable (Not supplied) 300 Power cord 900 Remote control 802A Accessory box 803 Packing 804 Bag 803 Packing 802 Box...

  • Page 12: Table Of Contents

    SECTION 3 ELECTRICAL CONTENTS ONE POINT REPAIR GUIDE ..........................3-2 1. NO POWER PROBLEM (PVDD) ......................3-2 2. POWER ON ERROR ..........................3-3 3. NO SOUND (PORTABLE FUNCTION) ....................3-5 4. NO BLUETOOTH ............................ 3-6 5. NO SOUND (USB) ..........................3-7 6.

  • Page 13: One Point Repair Guide

    ONE POINT REPAIR GUIDE 1. NO POWER PROBLEM (PVDD) No power problem occurs when you power on the unit. 1-1. Solution Replace SMPS board. 1-2. How to troubleshoot (Countermeasure) 1) Check the PVDD voltage 22.2 V at pin4, pin5, pin6. When you check the no power at this point, then replace SMPS PCB board.
  • Page 14 ONE POINT REPAIR GUIDE 2. POWER ON ERROR No display or Not working. 2-1. IC600 1) Check 12 VA at nearby L610 pin1 on IC600. 2) If 12 VA is not checked at the point, then find 22 VA at pin7 of IC600. 3) 2) is OK....

  • Page 15: Power On Error

    ONE POINT REPAIR GUIDE POWER ON ERROR No display or Not working. 2-3. IC602 1) Check 5.2 VA at L604. 2) If 12 VA is not checked, then find 12 VA at pin3 of IC602. 3) 2) is OK  Replace IC602. IC602 pin3 IC602 pin3 L604...

  • Page 16: Sound (Portable Function)

    ONE POINT REPAIR GUIDE 3. NO SOUND (PORTABLE FUNCTION) 3-1. Solution Replace IC508 or portable jack (JK502). 3-2. How to troubleshoot (Countermeasure) 1) Please check the soldering status of portable jack (JK502). 2) Please check L501, L502(PORT_L, PORT_R signal) of portable jack (JK502). If you cannot find input signal, replace portable jack (JK502).

  • Page 17: Bluetooth

    ONE POINT REPAIR GUIDE 4. NO BLUETOOTH 4-1. Solution Replace IC502 on MAIN board. (No 3.3 V) 4-2. How to troubleshoot (Countermeasure) 1) Please check externally status of Bluetooth cable connection on your eyes (at CN505 and Bluetooth Module). 2) Please check the 3.3 VA (at L504) If 3.3 VA is OK at L504, please check BT_TX, BT_RX, BT_RST (pin25, pin27, pin29) of IC502 .

  • Page 18: Sound (Usb)

    ONE POINT REPAIR GUIDE 5. NO SOUND (USB) 5-1. Solution Replace IC502 on MAIN board. 5-2. How to troubleshoot (Countermeasure) 1) Please check USB voltage (5 V) of JK503 (pin1). 2) Please check USB data signal (D-, D+ ) of IC502 (to check pin2, pin3 at JK503). If you have not data signal, please replace IC502.

  • Page 19: Sound (Optical)

    ONE POINT REPAIR GUIDE 6. NO SOUND (OPTICAL) 6-1. Solution Replace IC507 on MAIN board. 6-2. How to troubleshoot (Countermeasure) 1) Please check 3.3 VA at L525. If you can check 3.3 VA, please confirm OPT_DET signal (R5E8) in MAIN board when optical mode. 2) In spite of process 1), set has abnormal output, then replace IC507.

  • Page 20: Hdmi Problem

    ONE POINT REPAIR GUIDE 7. HDMI PROBLEM No display or No Sound. 7-1. HDMI jack connection 1) Check the HDMI jack connection correctly each port. (JK801, JK802 : IN, JK800 : OUT) JK802 JK802 JK801 JK801 JK800 JK800 < MAIN board top view > 7-2.

  • Page 21: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. DSP OPERATING CHECK DSP part check. Check Check voltage of IC502 IC601/ IC603 Replace IC600. (3.3 VA/ 1.2 VA). (12 VA/ 5.2 VA). Check the peripheral of IC601/ IC603. Check Check M CLK of IC503 is Replace IC503.

  • Page 22: Portable Part Check

    ELECTRICAL TROUBLESHOOTING GUIDE 3. PORTABLE PART CHECK PORTABLE display check. Check Check display if JK502 connection Recheck connection JK502. “NO PORTABLE”. is good. Check Check if the IC508 Check and replace is the pin4 of IC508 is normal? IC605/ IC606. 3.3 V/ 5.0 V? Check I2S data to pin6,7 of IC508...

  • Page 23: Hdmi Part Check

    ELECTRICAL TROUBLESHOOTING GUIDE 5. HDMI PART CHECK HDMI part check. Check if output of IC802, IC803 is Replace IC802, IC803. 3.3 V/ 1.0 V? Check if IC801 pin4, 33, 63 are 3.3 V. Check the operation X801 : 27.0 MHz. Replace IC801.

  • Page 24: Lcd Display Check

    ELECTRICAL TROUBLESHOOTING GUIDE 7. LCD DISPLAY CHECK LCD display check. Check Check if harness connection Check the connection CN501. if LCD light On. is good. Check CN301 voltage condition Check the connection CN301. 12 V, 5 V, 3.3 V is good? Replace LCD module.

  • Page 25: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. CRYSTAL FIG 1-1. X501 (24 MHz) FIG 1-2. X502 (24.576 MHz) FIG 1-3. X801 (27 MHz) 3-14...

  • Page 26: Flash Memory

    2. FLASH MEMORY FIG 2. VCC, CS#, CLK, DO 3-15...

  • Page 27: Tact Key

    3. TACT KEY 1 ~ 1.13 V 0.72 ~ 0.82 V FIG 3-1. Press Power Key FIG 3-2. Press FUNC Key 0.424 ~ 0.485 V FIG 3-3. Press VOL- Key FIG 3-4. Press VOL+ Key 3-16...

  • Page 28: Usb

    4. USB FIG 4-1. USB_5V FIG 4-2. USB D+ FIG 4-3. USB D- 3-17...

  • Page 29: Remote Control

    5. REMOTE CONTROL FIG 5-1. Input Voltage FIG 5-2. Low Timing Item Measured Spec. IR Receiver Spec: Input Level 3.3 V 2.7 ~ 5.5 V “ Low” Timing 4.4 ms 3.6 ms ~ 5.04 ms “ High” Timing 4.48 ms 4.08 ms ~ 5.04 ms FIG 5-3.

  • Page 30: Optical

    6. OPTICAL FIG 6-1. OPT_IN FIG 6-2. OPT_DET 3-19...

  • Page 31: Portable

    7. PORTABLE FIG 7-1. ADC IC_5V FIG 7-2. ADC IC_ 3.3V 1 1 .27 Vrms FIG 7-3. Analog Input Voltage 3-20...
  • Page 32 8. AUDIO PWM (1/2) FIG 8-1. PWM IC_3.3V FIG 8-2. PWM IC_22.04V FIG 8-3. BCK 25 26 FIG 8-4. LRCK 3-21...

  • Page 33: Audio Pwm

    AUDIO PWM (2/2) SWF+ 352.73 kHz SWF- 352.73 kHz FIG 8-5. Subwoofer + FIG 8-6. Subwoofer - 352.73 kHz FL+ FL- FIG 8-7. Front L 352.73 kHz FR+ FR- FIG 8-8. Front R 3-22...

  • Page 34: Audio Amp

    9. AUDIO AMP PVDD: 22.1 V FIG 9-1. AMP IC PVDD PVDD DVDD AMP_PDN FIG 9-2. AMP IC DVDD, AMP_PDN 3-23...
  • Page 35 3-24...

  • Page 36: Wiring Diagram

    WIRING DIAGRAM : HARNESS FUNC : HARNESS B/IN FRONT 1 FR-4 EPOXY LCD Display 2 LAYER Receiver SMT 14P S SMT 10P S SMT 14P S MAIN SMPS (FR-4 EPOXY 4LAYER ) (FR1-Phenol B to B HDMI Out HDMI IN 1 HDMI IN 2 Optical Portable...

  • Page 37: Block Diagrams

    BLOCK DIAGRAMS 1. BLOCK DIAGRAM #1 MAIN / AMP PCB 27 MHz 24 MHz HDMI IN FRONT PCB TMDS TMDS HDMI IC SiI9533 (Silicon) HDMI OUT TMDS D ± ± RCU_IN IR - Receiver SPDIF MLC3730ST LED_CTRL Optical In STB LED SPDIF CS8422 MCLK, BCK, LRCK...

  • Page 38: Block Diagram #2

    TAS5733 POWER / FUNC / VOL+ / - TX_LRCK Controller TX_BCK TX_ADATA0 Audio Delay TX_ADATA1 30 W TX_ADATA2 LG Post PP 24 bit Max / Min Trunc. LCD_CLK AMP_FAULT / CLIP0 / AMP_PROTECT TAS5733 LCD_STB Scaling AMP_PDN(RST) [+36 dB] LCD_BL_CTRL...

  • Page 39: Voltage Block Diagram

    3. VOLTAGE BLOCK DIAGRAM SMPS HDMI P-sense P_Sense 1.2 VA AVCC_5V 96 mA 22 VA 11 mA USB_1.2V 20 mA HDMI_3V3 43 mA DC - DC ADC_3.3VA 30 mA MLC3730 SIL9533 VCC_3V3 13 mA USB_3.3VA 30 mA 5.2 VA TPS563200 TPVDD_1.0V IO_3.3VA 33 mA...

  • Page 40: Circuit Diagrams

    DESIGN BE MODIFIED OR ALTERED WITHOUT DIFFER FROM THE ACTUAL CIRCUIT USED. THIS 2. Voltages are DC-measured with a digital voltmeter PERMISSION FROM THE LG CORPORATION. ALL WAY, IMPLEMENTATION OF THE LATEST SAFETY during Play mode. COMPONENTS SHOULD BE REPLACED ONLY WITH...

  • Page 41: Main - Dsp Circuit Diagram

    2. MAIN - DSP CIRCUIT DIAGRAM : WAVEFORM NUMBER EAX66168901_Rev1.7(18) MAIN(#2) 2015.01.14 3-35 3-36...

  • Page 42: Main - Amp Circuit Diagram

    3. MAIN - AMP CIRCUIT DIAGRAM 25 26 : WAVEFORM NUMBER EAX66168901_Rev1.7(18) MAIN(#3) 2015.01.14 3-37 3-38...

  • Page 43: Main - Power Circuit Diagram

    4. MAIN - POWER CIRCUIT DIAGRAM POWER EAX66168901_Rev1.7(18) MAIN(#4) 2015.01.14 3-39 3-40...

  • Page 44: Main - Hdmi Circuit Diagram

    5. MAIN - HDMI CIRCUIT DIAGRAM : WAVEFORM NUMBER HDMI EAX66168901_Rev1.7(18) MAIN(#5) 2015.01.14 3-41 3-42...

  • Page 45: Front Circuit Diagram

    6. FRONT CIRCUIT DIAGRAM : WAVEFORM NUMBER FRONT EAX66229101_Rev1.3(10) 2014.12.31 3-43 3-44...

  • Page 46: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART 1. ICs Designator Description Pin No. Spec. Rate Value Real Value Check Loca. Designator Description Pin No. Spec. Rate Value Real Value Check Loca. IC,Serial Flash Memory 1.08~1.32 1.2VA 1.18 C517 IC501 2.97~3.63 3.3VA 3.28 L515 MX25L8035EM2I-10G 1M A9,E9,J14,U4 1.08~1.32 1.2VA...

  • Page 47: Connectors

    3. CONNECTORS PIN NO. PIN NAME INPUT V OUTPUT V SPEC PIN NO. PIN NAME INPUT V OUTPUT V SPEC CN301 (FRONT <-> MAIN) CN601 (MAIN <-> SMPS) REMOCON 3.3VA 3.29 3.29 2.97~3.63 VCC_12V 12.02 12.01 10.80~13.2 PVDD 22.04 22.05 19.80~24.20 VCC_5V 5.17...

  • Page 48: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P. C. BOARD (TOP VIEW) (BOTTOM VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 3-49 3-50...

  • Page 49: Main P. C. Board Diagram

    2. MAIN P. C. BOARD (TOP VIEW) (BOTTOM VIEW) 3-51 3-52...

  • Page 50: Front P. C. Board

    3. FRONT P. C. BOARD (TOP VIEW) (BOTTOM VIEW) 3-53 3-54...
  • Page 51 3-55 3-56...

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