LG MUSIC flow HS6 Service Manual
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LG MUSIC flow HS6 Service Manual

LG MUSIC flow HS6 Service Manual

Smart hi-fi audio wireless multi-room sound bar
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Internal Use Only
Website http://biz.lgservice.com
SMART Hi-Fi AUDIO
Wireless Multi-room Sound Bar
SERVICE MANUAL
MODEL: MUSIC flow HS6 (LAS650M)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN76793374
OCTOBER, 2014

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Summary of Contents for LG MUSIC flow HS6

  • Page 1 Internal Use Only Website http://biz.lgservice.com SMART Hi-Fi AUDIO Wireless Multi-room Sound Bar SERVICE MANUAL MODEL: MUSIC flow HS6 (LAS650M) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN76793374 OCTOBER, 2014...
  • Page 2 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..ELECTRICAL SECTION 3 ..CABINET & MAIN CHASSIS SECTION 4 ..WIRELESS SUBWOOFER PART SECTION 5 ..REPLACEMENT PARTS LIST...

  • Page 3: Table Of Contents

    SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS ..........1-3 SERVICING PRECAUTIONS .......................... 1-4 • GENERAL SERVICING PRECAUTIONS • INSULATION CHECKING PRODEDURE • ELECTROSTATICALLY SENSITIVE (ES) DEVICES LAN UPDATE GUIDE ............................1-5 SOFTWARE UPDATE GUIDE ........................1-9 HOW TO WIRELESS FACTORY RESET &...

  • Page 4: Product Safety Servicing Guidelines For Audio 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

    SERVICING PRECAUTIONS CAUTION: Before servicing the Audio products covered by this Electrostatically Sensitive (ES) Devices service data and its supplements and addends, read and fol- Some semiconductor (solid state) devices can be damaged low the SAFETY PRECAUTIONS. easily by static electricity. Such components commonly are NOTE: if unforeseen circumstances create conflict between called Electrostatically Sensitive (ES) Devices.

  • Page 6: Lan Update Guide

    LAN UPDATE GUIDE 1. Using MP tool 1) Open MP tool and select “Key DN”. 2) Check the section for download and open download fi le.
  • Page 7 3) Connect PC and SET by cross LAN cable. PC IP setting 192.168.0.1 Subnet: 255.255.254.0 Gateway: 10.168.0.1 4) Set power on. 5) Connect LAN cable to Set and then Press “ADD” key within 3 seconds after connect the LAN. (Please connect the LAN when blinking WiFi-LED after booting) *Download fi...
  • Page 8 7) Press “Update” button. 8) Download result display “OK!” if start download.
  • Page 9 9) You can identify update status by network indicator lamp. <Updating : blinking red LED> <Complete update : blinking white LED>...

  • Page 10: Software Update Guide

    SOFTWARE UPDATE GUIDE 1. Using USB 1-1. MICOM 1) Copy the fi rmware to USB. - Change the fi le name to “MICOM_LAS650.HEX”. 2) Insert USB to USB port. 3) VFD display “UPGRADE”. 4) Press “PLAY/PAUSE” key. 5) VFD display “M-UPDATE”. 6) Set auto power off after updating done.
  • Page 11 2. Using APP 1) Connect set and music fl ow app. 2) Select “setup  update” menu then you can see below menu. 3) Enter “Check” button then display speaker list for update. download 1-10...
  • Page 12 4) Enter “download” button then start download to speaker. d o wn load Downloading… 5) Display below menu after done download then enter “Ready” button for updating. Read y Downloaded 1-11...
  • Page 13 6) Display below menu after done update Updated 7) Set rebooting. (Booting previous version if failed update.) 1-12...

  • Page 14: How To Wireless Factory Reset & Pairing

    HOW TO WIRELESS FACTORY RESET & PAIRING 1) Main set Wireless Reset - Volume Minimum state + Remote controller “mute” for 5 seconds. - Then, Wireless RST will be displayed on the LCD. 2) Power off Main set. 3) Active Woofer Wireless Reset - Press the button on the back of the set for 5 seconds.

  • Page 15: Version Check

    VERSION CHECK 1) PC IP setting 192.168.0.1 Subnet: 255.255.254.0 Gateway: 10.168.0.1 2) Open MP tool. 3) Set power on. 4) Press “ADD” button after connect LAN cable. 5) Display the version in the tool. 1-14...

  • Page 16: Option Edit Guide

    OPTION EDIT GUIDE 1-1. Option Edit-1 1) PC IP setting 192.168.0.1 Subnet: 255.255.254.0 Gateway: 10.168.0.1 2) Open MP tool. 3) Check Option Transmission and select option fi le by “File open” button. 4) Set power on. 5) Press “ADD” button after connect LAN cable. 6) Enter “Update”...

  • Page 17: Specifications

    SPECIFICATIONS • GENERAL (LAS650M) AC adapter requirements Input 100 - 240 V ~ 50 / 60 Hz Output 25 V Power consumption 30 W Networked standby : 6 W Dimensions (W x H x D) (1020 x 42 x 82) mm (with Foot) Net Weight (Approx.) 2.0 kg Operating temperature...
  • Page 18 SECTION 2 ELECTRICAL CONTENTS ONE POINT REPAIR GUIDE ..........................2-2 1. IF THERE IS NO SOUND OR HAVE A PROBLEM ON LCD..............2-2 2. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET ........... 2-3 3. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET ........... 2-4 4.

  • Page 19: One Point Repair Guide

    ONE POINT REPAIR GUIDE 1. IF THERE IS NO SOUND OR HAVE A PROBLEM ON LCD. 1-1. IC601 (NO 12 V) 1-1-1. Solution Replace IC601 on AMP board. 1-1-2. How to troubleshoot (Countermeasure) 1) Please, check 25 VA of IC601 pin2 (VIN). 2) If 25 VA is abnormal, check the parts (L603, F601, JK600).

  • Page 20: If The Set Doesn't Booting When You Turn On The Set

    ONE POINT REPAIR GUIDE 2. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET. 2-1. IC308 (NO 5.3 VA) 2-1-1. Solution Replace IC308 on MAIN board. 2-1-2. How to troubleshoot (Countermeasure) 1) Please, check 25 VA of IC308 pin2 (VIN). 2) If 25 VA is abnormal, check the parts (MAIN board: L312, R342, CN104, AMP board: F601, CN600, JK600).
  • Page 21 ONE POINT REPAIR GUIDE 3. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET. 3-1. IC301 (NO VCC_5V) 3-1-1. Solution Replace IC301 on MAIN board. 3-1-2. How to troubleshoot (Countermeasure) 1) Please, check 5.3 VA of IC301 pin2 (VIN). 2) If 5.3 VA is abnormal, follow the stage 2-1 (IC308).

  • Page 22: If The Set Doesn't Booting When You Turn On The Set (Led Does Not Turn On)

    ONE POINT REPAIR GUIDE 4. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET. (LED DOES NOT TURN ON) 4-1. IC309 (NO 3.7 VA) 4-1-1. Solution Replace IC309 on MAIN board. 4-1-2. How to troubleshoot (Countermeasure) 1) Please, check 25 VA of IC309 pin2 (VIN). 2) If 25 VA is abnormal, check the parts (MAIN board: L313, R343, CN104, AMP board: F601, CN600, JK600).
  • Page 23 ONE POINT REPAIR GUIDE 5. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET. (LED DOES NOT TURN ON) 5-1. IC302 (NO 3.3 VA) 5-1-1. Solution Replace IC302 on MAIN board. 5-1-2. How to troubleshoot (Countermeasure) 1) Please, check 3.7 VA of IC302 pin3 (VIN). 2) If 3.7 VA is abnormal, follow the stage 4-1 (IC309).

  • Page 24: If The Set Doesn't Booting When You Turn On The Set

    ONE POINT REPAIR GUIDE 6. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET. 6-1. IC304 (NO D_3.3V) 6-1-1. Solution Replace IC304 on MAIN board. 6-1-2. How to troubleshoot (Countermeasure) 1) Please, check D_3.3V of IC304 pin6 (VOUT). 2) If D_3.3V is abnormal, follow the stage 4-1 (IC309).

  • Page 25: If There Is No Sound

    ONE POINT REPAIR GUIDE 7. IF THERE IS NO SOUND. 7-1. IC307 (NO PWM_3.3V) 7-1-1. Solution Replace IC307 on MAIN board. 7-1-2. How to troubleshoot (Countermeasure) 1) Please, check PWM_3.3V of IC307 pin6 (VOUT). 2) If PWM_3.3V is abnormal, follow the stage 4-1 (IC309). 3) If 3.7 VA is OK, please check R338.

  • Page 26: If The Set Doesn't Booting When You Turn On The Set

    ONE POINT REPAIR GUIDE 8. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET. 8-1. IC300 (NO 1.5 V / 1.2 V) 8-1-1. Solution Replace IC300 on MAIN board. 8-1-2. How to troubleshoot (Countermeasure) 1) Please check 5.3 VA of L300 (VIN). 2) If 5.3 VA is abnormal, follow the stage 2-1 (IC308).

  • Page 27: If The Set Doesn't Booting When You Turn On The Set (Led Does Not Turn On)

    ONE POINT REPAIR GUIDE 9. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET. (LED DOES NOT TURN ON) 9-1. IC100 (MICOM doesn’t work) 9-1-1. Solution Replace IC100 on MAIN board. 9-1-2. How to troubleshoot (Countermeasure) 1) Check 3.3 VA of IC100 pin48 (VIN). 2) If 3.3 VA is abnormal, follow the stage 5-1 (IC302).

  • Page 28: Sound From The R Ch Speaker

    ONE POINT REPAIR GUIDE 10. NO SOUND FROM THE R ch SPEAKER. 10-1. IC7000 (NO 25 VA / 12 V) 10-1-1. Solution Replace IC7000 on AMP board. 10-1-2. How to troubleshoot (Countermeasure) 1) Please check C7003 for 25 VA of IC7000, 12 V of R7000. ...

  • Page 29: Sound From The L Ch Speaker

    ONE POINT REPAIR GUIDE 11. NO SOUND FROM THE L ch SPEAKER. 11-1. IC7001 (NO 25 VA / 12 V) 11-1-1. Solution Replace IC7001 on AMP board. 11-1-2. How to troubleshoot (Countermeasure) 1) Please check C7038 for 25 VA of IC7001, 12 V of R7014. ...

  • Page 30: If Not Booting When You Turn On The Set

    ONE POINT REPAIR GUIDE 12. IF NOT BOOTING WHEN YOU TURN ON THE SET. 12-1. IC501 (MPEG IC) 12-1-1. Solution Replace IC501 on MAIN board. (This chip is so hard to change IC, so we recommend to change PCB.) 12-1-2. How to troubleshoot (Countermeasure) 1) Check physical status of IC501 on your eyes.
  • Page 31 ONE POINT REPAIR GUIDE 13. IF NOT BOOTING WHEN YOU TURN ON THE SET. 13-1. IC503, IC504 (DDR IC) 13-1-1. Solution Replace IC503, IC504 on MAIN board.(This chip is so hard to change IC, so we recommend to change PCB.) 13-1-2.

  • Page 32: If Not Booting When You Turn On The Set

    ONE POINT REPAIR GUIDE 14. IF NOT BOOTING WHEN YOU TURN ON THE SET. 14-1. IC505 (NAND Flash Memory IC) 14-1-1. Solution Replace IC505 on MAIN board. 14-1-2. How to troubleshoot (Countermeasure) 1) Check D_3.3V of R512, R511 and C5B1. 2) If D_3.3V is abnormal, follow the stage 6-1 (IC304).

  • Page 33: Wired Network Connection Error

    ONE POINT REPAIR GUIDE 15. WIRED NETWORK CONNECTION ERROR. When you connect AP through the wired LAN, connection failed. 15-1. Ethernet Jack (JK202) 15-1-1. Solution Replace JK202 on MAIN board. 15-1-2. How to troubleshoot (Countermeasure) 1) If there is soldering problem, please re-soldering pin JK202. 2) If after re-soldering, problem still occurs, replace JK202.

  • Page 34: Portable Function Doesn't Working

    ONE POINT REPAIR GUIDE 16. PORTABLE FUNCTION DOESN’T WORKING 16-1. IC200 16-1-1. Solution Replace IC200 on MAIN board. 16-1-2. How to troubleshoot (Countermeasure) 1) Check VCC_5V of L204. If VCC_5V is abnormal, follow the stage 3-1 (IC301). 2) Check D_3.3V of L207. If D_3.3V is abnormal, follow the stage 6-1 (IC304). 3) If VCC_5V and D_3.3V are OK, check the PTB_DET is high state when portable cable connected (R128).

  • Page 35: Optical Function Doesn't Working

    ONE POINT REPAIR GUIDE 17. OPTICAL FUNCTION DOESN’T WORKING 17-1. Optical Jack (JK201) 17-1-1. Solution Replace JK201 on MAIN board. 17-1-2. How to troubleshoot (Countermeasure) 1) If there is soldering problem, please re-soldering pin JK201. 2) Check 3.3 VA of L203. 3) Check the OPT_DET and OPT_SPDIF show signal when optical cable connected (R205, R207).

  • Page 36: Bluetooth Function Doesn't Working

    ONE POINT REPAIR GUIDE 18. BLUETOOTH FUNCTION DOESN’T WORKING 18-1. Bluetooth module 18-1-1. Solution Replace Bluetooth module. 18-1-2. How to troubleshoot (Countermeasure) 1) Check 3.3 VA of L205. 2) Check the BT_RST (R157).  If it’s weird, follow the stage 9-1 (IC100). ...

  • Page 37: Hdmi Function Doesn't Working

    ONE POINT REPAIR GUIDE 19. HDMI FUNCTION DOESN’T WORKING 19-1. IC501 19-1-1. Solution Replace IC501 on MAIN board.(This chip is so hard to change IC, so we recommend to change PCB.) 19-1-2. How to troubleshoot (Countermeasure) 1) Check HDMI_5VA of L800. 2) If It is abnormal, check 5.3 VA of IC306 pin1.

  • Page 38: Wi-Fi Function Doesn't Working

    ONE POINT REPAIR GUIDE 20. Wi-Fi FUNCTION DOESN’T WORKING 20-1. Wi-Fi module 20-1-1. Solution Replace Wi-Fi module or IC501 on MAIN board. (This chip is so hard to change IC, so we recommend to change PCB.) 20-1-2. How to troubleshoot (Countermeasure) 1) Check Wi-Fi cable state.

  • Page 39: Wireless Woofer Connection Doesn't Working

    ONE POINT REPAIR GUIDE 21. WIRELESS WOOFER CONNECTION DOESN’T WORKING 21-1. Wireless module and IC305 21-1-1. Solution Replace Wireless module or IC305 on MAIN board. 21-1-2. How to troubleshoot (Countermeasure) 1) Try to connect MAIN set and subwoofer according to the factory reset step. 2) If it is OK, change the wireless module, and try again.

  • Page 40: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER / MICOM / LCD Does the LED Is R141 Replace micom (IC100). blinking? low state? Pin4 of CN400 Replace LCD. should be 5 V. Pin2 of IC301 Replace IC301. should be 5.3 V. Does IC308 work? Replace IC308.

  • Page 41: Wi-Fi

    ELECTRICAL TROUBLESHOOTING GUIDE 2. Wi-Fi L307 Does Wi-Fi cable Replace Wi-Fi module. should be 3.5 V. connection OK? Connect cable again. Pin3 of IC302 Pin2 of IC302 should be high. should be 3.7 V. Check IC501. L313 Replace IC313. should be 25 V. Check adaptor.

  • Page 42: Amp / Pwm

    ELECTRICAL TROUBLESHOOTING GUIDE 3. AMP / PWM Set turns on but there is no sound. Check the connection Connect CN803 & CN804. of CN803 & CN804. PVDD should be Check adaptor. 25 V (C7038). Pin3 of IC601 GVDD should be should be high Replace IC601.

  • Page 43: Pairing Bluetooth

    ELECTRICAL TROUBLESHOOTING GUIDE 4. PAIRING BLUETOOTH Connect FFC. Check the connection of FFC. Check power. L205 should be 3.3 V. BT_RST should be high Check micom (IC100). (pin2 of CN201). Change BT module. Check MPEG (IC501). If it still doesn’t work 2-26...

  • Page 44: Optical

    ELECTRICAL TROUBLESHOOTING GUIDE 5. OPTICAL ‘Optical’ should be displayed, when optical cable is connected well. Check power. L203 should be 3.3 V. OPT_SPDIF signal Check optical cable. should be shown (R207). Check MPEG (IC501). Even though all of above things are OK, there is no sound. Check AMP.

  • Page 45: Portable

    ELECTRICAL TROUBLESHOOTING GUIDE 6. PORTABLE ‘Portable’ should be displayed, when portable cable is connected well. Signal should be flow Check cable. (C203, C204). Check power. L204 should be 5 V. L207 should be 3.3 V. Check CLK Check MPEG (IC501). (R215, R216, R220).

  • Page 46: Hdmi

    ELECTRICAL TROUBLESHOOTING GUIDE 7. HDMI ‘HDMI IN’ should be displayed, when HDMI cable to HDMI IN is connected well. L800 should be 5 V. Check HDMI OUT cable. Check MPEG (IC501). Pin1 of IC306 Replace IC306. should be 5.3 V. Check power.

  • Page 47: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. MPEG X-TAL 27 MHz: R510 2. PWM X-TAL 24.576 MHz: X600 2-30...

  • Page 48: Micom (Eeprom)

    3. MICOM (EEPROM) EEPROM IC101 PIN 5,6 at booting time of the system 4. MPEG I2S between MPEG and PWM 2-31...
  • Page 49 2-32...

  • Page 50: Wiring Diagram

    WIRING DIAGRAM ROM version Wi-Fi Wireless TX 2P, 1.25mm ST, Lock, SMD (EAG60989201) ADAPTER 10P, 1.0mm 5P, 2.0mm ST, Non_Lock, SMD S S S S S S S AG, Lock, SMD (6630XE00110) (6630VK19605) 26P, 2mm ST, SOCKET, SMD 26P, 0.5mm 6P, 1.25mm (EAG63717507) (T14032000007)

  • Page 51: Block Diagrams

    BLOCK DIAGRAMS 1. SYSTEM BLOCK DIAGRAM TACT PWM_RST/MUTE/I2C_DAT/I2C_CLK LCD_DO/CLK PORTABLE IKEY PCM1808 M_BCK/LRCK/DATA0,1,2,3 PS9860 /STB/RMC Slave FRONT 160 W EEPROM EEP_CLK/DAT 24.576 MHz (2 KB) MICOM PWR_SENS AZ7027 40 W PTB_DET TAS5612 RENESAS 48P AMP_PROTECT/PDN/SD_OTW/CLIP 40 W BT_DET/RX OPT_DET PWM_DATA1~4 40 W WL_RST/DAT/CLK/MUTE/INT/MSG_RDY I2C/HPD/CEC/EDID_SW...

  • Page 52: Power Block Diagram

    2. POWER BLOCK DIAGRAM RMS output 400mA_RMS Power Measurement condition :20W 40/8 x 2=10W, 5/8 x 16= 20W (mW) 3200mA_RMS Measurement condition Peak output 1k 0dB condition : 160W 25VA 6400mA_8.3ms_Dynamic condition 40 x 2=80W, 5 x 16= 80W Instantaneous peak condition :160W Adapter TAS5612 1036mA_RMS...

  • Page 53: Circuit Diagrams

    CIRCUIT DIAGRAMS 1. MAIN - MICOM CIRCUIT DIAGRAM MICOM EAX66047703 Rev1.0(0) MAIN(#1) 2014. 09. 19 2-39 2-40...

  • Page 54: Main - Mpeg Circuit Diagram

    2. MAIN - MPEG CIRCUIT DIAGRAM MPEG EAX66047703 Rev1.0(0) MAIN(#2) 2014. 09. 19 2-41 2-42...

  • Page 55: Main - Memory Circuit Diagram

    3. MAIN - MEMORY CIRCUIT DIAGRAM MEMORY EAX66047703 Rev1.0(0) MAIN(#3) 2014. 09. 19 2-43 2-44...

  • Page 56: Main - Adc & I/O Circuit Diagram

    4. MAIN - ADC & I/O CIRCUIT DIAGRAM ADC & I/O EAX66047703 Rev1.0(0) MAIN(#4) 2014. 09. 19 2-45 2-46...

  • Page 57: Main - Dcdc Circuit Diagram

    5. MAIN - DCDC CIRCUIT DIAGRAM DCDC EAX66047703 Rev1.0(0) MAIN(#5) 2014. 09. 19 2-47 2-48...

  • Page 58: Amp - Pwm Circuit Diagram

    6. AMP - PWM CIRCUIT DIAGRAM EAX66107803 Rev1.0(0) AMP(#1) 2014. 09. 19 2-49 2-50...

  • Page 59: Amp - Amp Circuit Diagram

    7. AMP - AMP CIRCUIT DIAGRAM EAX66107803 Rev1.0(0) AMP(#2) 2014. 09. 19 2-51 2-52...

  • Page 60: Front Circuit Diagram

    8. FRONT CIRCUIT DIAGRAM FRONT EAX66107703 Rev1.0(0) 2014. 09. 19 2-53 2-54...

  • Page 61: Key Circuit Diagram

    9. KEY CIRCUIT DIAGRAM EAX66067903 Rev1.0(0) 2014. 09. 19 2-55 2-56...

  • Page 62: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART IC Sym IC Name / Type Vcc / Vdd IC Sym IC Name / Type Vcc / Vdd IC Sym IC Name / Type Vcc / Vdd IC100 R5F100GEAFB#30 •Spec: •Spec: •Spec: TJ5205SF5-ADJ TYPE: 48P VDD: -0.5V~6.5V Vin:2.5V~16V VDD_IO: 2.79V~3.63V IC306...

  • Page 63: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 2-59 2-60...

  • Page 64: Amp P. C. Board Diagram

    2. AMP P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 3. FRONT P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 4. KEY P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 2-61 2-62...
  • Page 65 2-63 2-64...
  • Page 66 SECTION 3 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ............................3-3 1. MAIN SET SECTION ..........................3-3 2. WIRELESS SUBWOOFER SECTION ...................... 3-5 3. PACKING ACCESSORY SECTION ......................3-7...

  • Page 68: Exploded Views

    EXPLODED VIEWS 1. MAIN SET SECTION CABLE6 A44B A44A CABLE2 CABLE1 MAIN FRONT CABLE7 CABLE4 WIRELESS CABLE5 Wi-Fi...

  • Page 69: Wireless Subwoofer Section

    2. WIRELESS SUBWOOFER SECTION NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. A900A A900 SMPS WIRELESS A47A A54A 300A A45A A49A A48A...

  • Page 70: Packing Accessory Section

    3. PACKING ACCESSORY SECTION Optional Part 806 Optical cable 801 Owner’s manual 828 LG Tag On Sticker 829 Cable tie 833 AC Adapter 300 Power cord 835 Wall Mount Bracket 836 Screws (2) 900 Remote control 808 Batteries 803 Main packing...
  • Page 71 3-10...
  • Page 72 SECTION 4 WIRELESS SUBWOOFER PART CONTENTS ONE POINT REPAIR GUIDE ..........................4-2 1. NO POWER PROBLEM ......................... 4-2 2. NO SOUND ............................. 4-4 ELECTRICAL TROUBLESHOOTING GUIDE ....................4-5 1. POWER SUPPLY ON SMPS BOARD ....................4-5 2. GENERAL PART CHECK ........................4-6 WAVEFORMS ..............................

  • Page 73: One Point Repair Guide

    ONE POINT REPAIR GUIDE 1. NO POWER PROBLEM No power problem occurs when you power on the unit. 1-1. Fuse & Bridge diode 1-1-1. Solution Replace F901, BD901 on SMPS board. 1-1-2. How to troubleshoot (Countermeasure) 1) Look at the physical of fuse F901. 2) Check the bridge diode BD901.
  • Page 74 ONE POINT REPAIR GUIDE NO POWER PROBLEM No power problem occurs when you power on the unit. 1-2. PVDD (36 V) abnormal 1-2-1. Solution Replace D951, IC901. 1-2-2. How to troubleshoot (Countermeasure) Case 1) PVDD (36 V) abnormal: Check D951 and replace it. Case 2) If case 1 is not problem: Check IC901 and replace it.

  • Page 75: Sound

    ONE POINT REPAIR GUIDE 2. NO SOUND No sound from wireless woofer speaker after using long time. 2-1. HEATSINK 2-1-1. Solution Heatsink reassemble new one. 2-1-2. How to troubleshoot (Countermeasure) 1) AMP IC protection mode is operated by over heat. because the heat sink and AMP IC are not jointed securely.

  • Page 76: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER SUPPLY ON SMPS BOARD No 36 VA/ 17 VA Check the MICOM. P-CTRL High- PVDD : 36 V Is the P-CTRL normal ? P-CTRL Low - PVDD : 17 V Is the VCC Check or replace: Q901, ZD902, ZD901. P-CTRL High - VCC : 20 V (13 V ~ 22 V) supplied to IC901 P-CTRL Low - VCC : 12 V...

  • Page 77: General Part Check

    ELECTRICAL TROUBLESHOOTING GUIDE 2. GENERAL PART CHECK Main set play & power cord insert Pairing LED WCN605 cable Connect 3p harness cable blinking or green or connection? (Woofer inner cable). red? WCN602 FFC cable Connect 26p FFC cable connection. (Wireless module to WCN602). Connect 10p harness cable WCN601 cable connection?
  • Page 78 ELECTRICAL TROUBLESHOOTING GUIDE GENERAL PART CHECK Try to reset. Pairing LED green? LED green? WCN602 Main set play pin8, 24, 26 Replace wireless module. woofer sound ok? siglnal ok? WIC601 pin45, 46 Replace WIC601. PWM signal ok? WCN601 pin6, 7, 8 Check woofer SMPS.

  • Page 79: Waveforms

    WAVEFORMS 1. AUDIO PART (I2S) WCN602 pin26 : I2S LRCK WCN602 pin24 : I2S BCK WCN602 pin8 : I2S Audio Data...

  • Page 80: Wiring Diagram

    WIRING DIAGRAM 2P-RESET WCN604 PN901 Wireless Sub Woofer AMP PCB SMPS CN901 10 PIN 26P-FFC Wireless Wireless Module 4-10...

  • Page 81: Block Diagram

    BLOCK DIAGRAM PVDD Wireless Module +36 V 3.3 VA SERIAL Wireless RX TLV71333DBVR FLASH DWAM83 3.7 VA PVDD TLV71333DBVR +36 V 3.3V_PWM PS9860 AMP IC PWM IC Sub woofer TAS5624 12 V PVDD +36 V SMPS 4-11 4-12...

  • Page 82: Circuit Diagrams

    BE MODIFIED OR ALTERED WITH OUT PERMISSION WAY, IMPLEMENTATION OF THE LATEST SAFETY during Play mode. FROM THE LG CORPORATION. ALL COMPONENTS AND PERFORMANCE IMPROVEMENT CHANGES SHOULD BE REPLACED ONLY WITH TYPES INTO THE SET IS NOT DELAYED UNTIL THE NEW IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.

  • Page 83: Amp Circuit Diagram

    2. AMP CIRCUIT DIAGRAM W-AMP EAX65652401 Rev1.2(7) : WAVEFORM NUMBER 2014. 03. 05 4-15 4-16...

  • Page 84: Led Circuit Diagram

    3. LED CIRCUIT DIAGRAM 4. KEY CIRCUIT DIAGRAM W-KEY W-LED EAX65706401 Rev1.2(7) EAX65706301 Rev1.2(7) 2014. 03. 05 2014. 03. 05 4-17 4-18...

  • Page 85: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART 1. ICs Designator Description Part Site Specifi cation PIN Number SPEC REAL VALUE WOOFER AMP BOARD VDD_CORE : #6,25,63 VDD_CORE : 1.08V ~ 1.32V 1.25V WIC601 IC,Sound/Audio Processor PS9860 VOUT12_REG1,2 : #35,67 VOUT12_REG1,2 : 2.97V ~ 3.63V 3.29V PVDD : #29,30,31,36,37,38 PVDD : 12V ~ 38V...

  • Page 86: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 4-21 4-22...

  • Page 87: Amp P. C. Board Diagram

    2. AMP P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 3. LED P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 4. KEY P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 4-23 4-24...

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