LG Music Flow SH7B Service Manual Download

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SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.

Internal Use Only

JANUARY, 2016

MODEL: SH7B (SH7B, SPH7B-W)

SMART Hi-Fi AUDIO

Wireless Multi-room Sound Bar

P/NO : AFN77195045

MODEL: SH7B

(SH7B, SPH7B-W)

Summary of Contents for Music Flow SH7B

Page 1: ... MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Internal Use Only JANUARY 2016 MODEL SH7B SH7B SPH7B W SMARTHi FiAUDIO WirelessMulti roomSoundBar P NO AFN77195045 MODEL SH7B SH7B SPH7B W ...

Page 2: ...1 1 CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 WIRELESS SUBWOOFER PART SECTION 5 REPLACEMENT PARTS LIST ...

Page 3: ...1 3 SERVICING PRECAUTIONS 1 4 GENERAL SERVICING PRECAUTIONS INSULATION CHECKING PRODEDURE ELECTROSTATICALLY SENSITIVE ES DEVICES WIRELESS SUBWOOFER CONNECTION 1 5 HIDDEN MODE 1 6 LAN UPDATE GUIDE 1 7 SOFTWARE UPDATE GUIDE 1 11 VERSION CHECK 1 15 OPTION EDIT GUIDE 1 16 SPECIFICATIONS 1 17 ...

Page 4: ...rized line plug has not been defeated 3 Soldering must be inspected to discover possible cold solder joints solder splashes or sharp solder points Be certain to remove all loose foreign particles 4 Check for physical evidence of damage or deterioration to parts and components for frayed leads or damaged insulation including the AC cord and replace if necessary 5 No lead or component should touch a...

Page 5: ...Parts include Metal panels Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensitive ES Devices Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components The following tech...

Page 6: ...ay window briefly 3 If the LED of the wireless subwoofer already blinks in green continually you can skip this step Press and hold PAIRING on the back of the wireless subwoofer for more than 5 seconds The LED of the wireless subwoofer lights up alternately in red and green 4 Disconnect the power cord of the main unit and the wireless subwoofer 5 Connect them again after the LED of the main unit an...

Page 7: ...d button for 8 seconds Micom reset Main unit Volume Remote control SOUND EFFECT Option code mode Main unit Volume Remote control Night Mode Wireless reset Main unit VOL MIN volume minimum state Remote control Mute for about 3 seconds HIDDEN MODE ...

Page 8: ...1 7 LAN UPDATE GUIDE 1 Using MP tool 1 Open MP tool and select Key DN 2 Check the section for download and open download file ...

Page 9: ...ct 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 file name B E LG_NB_B200M06 ROM MICOM MICOM_LAS760 HEX Caution Do not you update the B E program and MICOM program at the same time 6 Connect Status change OK if success connect MP tool ...

Page 10: ...1 9 7 Press Update button 8 Download result display OK if start download ...

Page 11: ...1 10 9 You can identify update status by network indicator lamp White Updating blinking white LED ...

Page 12: ...0M06 ROM 2 Insert USB to USB port 3 VFD display UPGRADE 4 Press PLAY PAUSE key 5 VFD display B UPDATE 6 Set auto power off after updating done 1 3 MEQ 1 Copy the firmware to USB Change the file name to MEG_LAS760 BIN 2 Insert USB to USB port 3 VFD display UPGRADE 4 Press PLAY PAUSE key 5 VFD display UPDATE 6 Return to the before function after finished the updating 1 4 EQ 1 Copy the firmware to US...

Page 13: ...1 12 2 Using APP Power on Smart Audio and implement Music Flow App in your smart phone 1 Connect Speaker 3 Settings Version Info 2 Select red box 4 Select Version info ...

Page 14: ...3 5 Display Need to update if there are new firmware in the server 6 Start Update below icon Display new version info if you press Need to update Display update progress info Do not power off during update ...

Page 15: ...1 14 7 Display update info 8 Display Update is completed message when Complete update ...

Page 16: ...1 15 VERSION CHECK 1 PC IP setting IP 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 ...

Page 17: ...Check Option Transmission and select option file by File open button 4 Set power on 5 Press ADD button after connect LAN cable 6 Enter Update button in the tool menu 7 Download result is OK or NG 1 2 Option Edit 2 Need a HTS Remote control 1 Hidden mode Remote control NIGHT Main unit Vol key 2 Change option code by remote control ...

Page 18: ...DMI IN 19 Pin Type A HDMI connector x 1 HDMI OUT 19 Pin Type A HDMI connector x 1 AMPLIFIER RMS OUTPUT Total 360 W Front 40 W x 2 4 Ω at 1 kHz THD 10 Surround 40 W x 2 8 Ω at 12 kHz THD 10 Subwoofer 200 W 3 Ω at 80 Hz THD 10 WIRELESS SUBWOOFER Power requirements Refer to the main label on the subwoofer Power consumption Refer to the main label on the subwoofer Type 1 Way 1 Speaker Impedance 3 Ω Ra...

Page 19: ...1 18 ...

Page 20: ...CHASSIS CONTENTS DISASSEMBLY INSTRUCTIONS 2 2 1 HOW TO DISASSEMBLE THE MAIN SET 2 2 2 HOW TO DISASSEMBLE THE WOOFER 2 6 EXPLODED VIEWS 2 9 1 MAIN SET SECTION 2 9 2 WIRELESS SUBWOOFER SECTION 2 11 3 PACKING ACCESSORY SECTION 2 13 ...

Page 21: ...2 2 DISASSEMBLY INSTRUCTIONS Figure 1 2 Figure 1 1 1 HOW TO DISASSEMBLE THE MAIN SET 2 Remove the Case Bottom Assembly 1 Remove the 22 screws ...

Page 22: ...2 3 Figure 1 4 Figure 1 3 HOW TO DISASSEMBLE THE MAIN SET 4 Remove the SPK Chamber L R Assembly 3 Remove the 4 screws Disconnect the Harness FFC cables KEY SPK and Wi Fi and Remove the Main PCB Assembly ...

Page 23: ...2 4 Figure 1 6 Figure 1 5 HOW TO DISASSEMBLE THE MAIN SET 6 Remove the 4 screws and Disconnect FFC cables BT Wireless 5 Remove the L R Deco Assembly G G BT Wireless ...

Page 24: ...2 5 Figure 1 7 HOW TO DISASSEMBLE THE MAIN SET 7 Disassembly finish ...

Page 25: ...e the 5 screw s and Disconnect Harness FFC cables Wireless Power SPK 3 Remove the WF board Assembly and the Wireless Module 1 Remove the 13 screws and pull out the Rear Panel Assembly Power Inlet Socket Wireless FFC cable SPK cable Remove EVA covered Wireless module ...

Page 26: ...2 7 Figure 2 3 HOW TO DISASSEMBLE THE WOOFER 4 Disassembly finish ...

Page 27: ...2 8 ...

Page 28: ...Fi 278 279 468 A80R 506 A 281 282 506 283 284R A80L B 506 506 282 281 283 FRONT A43 I I LCD01 286 468 287 289 288 285R 284L 285L MAIN F D E A B C A46 262 263 260 265 Bluetooth D A52 CABLE2 F G H CABLE3 CABLE1 C E WIRELESS A54 CABLE4 470 261 268 468 506 468 468 257 264 269 258 267 266 EXPLODED VIEWS 1 MAIN SET SECTION ...

Page 29: ...951 B A 955 952 A 954 955 953 956 958 957 A900 A900W B 959 950 A45W A54W 2 WIRELESS SUBWOOFER SECTION ...

Page 30: ...Main packing 802A Accessory box 831 LAN cable 830 Cable holder 801 Owner s manual 806 Optical cable 300 Power cord 833 AC adapter 836 Screws 2 835 Wall bracket 808 Batteries 2 900 Remote control 3 PACKING ACCESSORY SECTION ...

Page 31: ...2 14 ...

Page 32: ...TWORK CONNECTION ERROR 3 16 16 PORTABLE FUNCTION DOESN T WORKING 3 17 17 OPTICAL FUNCTION DOESN T WORKING 3 18 18 BLUETOOTH FUNCTION DOESN T WORKING 3 19 19 HDMI FUNCTION DOESN T WORKING 3 20 20 Wi Fi FUNCTION DOESN T WORKING 3 21 21 WIRELESS WOOFER CONNECTION DOESN T WORKING 3 22 22 D DC PROTECTION 3 23 23 S SHUT DOWN PROTECTION 3 24 24 B BURNT PROTECTION 3 25 WAVEFORMS OF MAJOR CHECK POINT 3 26 ...

Page 33: ...oubleshoot Countermeasure 1 Please check 25 VA of IC302 pin2 VIN 2 If 25 VA is abnormal check the parts JK300 F301 F300 C301 D300 And change the weird one 3 If 25 VA is OK check PWR_CTRL R340 If it is not high state follow the stage 9 1 IC100 If it is high state please replace IC302 1 1 3 Service hint Any picture Remark MAIN board top view IC302 IC302 ...

Page 34: ...on Replace IC300 on MAIN board 2 1 2 How to troubleshoot Countermeasure 1 Please check 12 VA L304 of IC300 VIN 2 If 12 VA is abnormal follow the stage 1 1 IC302 3 If 12 VA is OK please replace IC300 2 1 3 Service hint Any picture Remark ONE POINT REPAIR GUIDE MAIN board top view IC300 IC300 ...

Page 35: ...oard 3 1 2 How to troubleshoot Countermeasure 1 Please check 5 1 VA of IC306 pin1 VIN 2 If 5 1 VA is abnormal follow the stage 2 1 IC300 3 If 5 1 VA is OK check PWR_CTRL R363 If it is not high state follow the stage 9 1 IC100 4 If it is high state please replace IC306 3 1 3 Service hint Any picture Remark MAIN board bottom view IC306 IC306 ...

Page 36: ... 4 1 2 How to troubleshoot Countermeasure 1 Please check 12 VA L311 of IC307 pin3 VIN 2 If 12 VA is abnormal follow the stage 1 1 IC302 3 If 12 VA is OK check DCDC_12_15_CTRL R333 If it is not high state follow the stage 9 1 IC100 4 If it is high state please replace IC307 4 1 3 Service hint Any picture Remark MAIN board top view IC307 IC307 ...

Page 37: ...ON 5 1 IC301 NO 3 4 VA 5 1 1 Solution Replace IC301 on MAIN board 5 1 2 How to troubleshoot Countermeasure 1 Please check 12 VA L305 of IC301 VIN 2 If 12 VA is abnormal follow the stage 1 1 IC302 If 12 VA is OK please replace IC301 5 1 3 Service hint Any picture Remark MAIN board top view IC301 IC301 ...

Page 38: ...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 5 1 IC301 3 If 3 3 VA is OK please check R334 If it is not high state follow the stage 9 1 IC100 6 1 3 Service hint Any picture Remark MAIN board top view IC304 IC304 ...

Page 39: ...N board 7 1 2 How to troubleshoot Countermeasure 1 Please check PWM_3 3V of L307 of IC304 pin6 VOUT 2 If PWM_3 3V is abnormal check 3 3VA pin1 VIN 3 If 3 3 VA is OK please replace IC304 If R334 is not high state follow the stage 9 1 IC100 7 1 3 Service hint Any picture Remark MAIN board top view IC304 IC304 ...

Page 40: ... 8 1 2 How to troubleshoot Countermeasure 1 Please check 12 VA L310 of IC303 pin3 VIN 2 If 12 VA is abnormal follow the stage 2 1 IC300 3 If 12 VA is OK check DCDC_12_15_CTRL R313 If it is not high state follow the stage 9 1 IC100 4 If it is high state please replace IC303 8 1 3 Service hint Any picture Remark MAIN board top view IC303 IC303 ...

Page 41: ...untermeasure 1 Check 3 3 VA of IC100 pin48 VIN 2 If 3 3 VA is abnormal follow the stage 5 1 3 If 3 3 VA of IC100 pin48 VIN is OK check the SF_CLK IC101 pin6 SF_DO pin2 signal If signal is abnormal change the IC100 4 If the SF_CLK pin6 SF_DO pin2 signals are OK check the IC101 pin8 VCC 3 3 VA If pin8 VCC 3 3 VA is OK replace the IC101 9 1 3 Service hint Any picture Remark MAIN board top view IC100 ...

Page 42: ...l follow the stage 1 1 IC302 2 If 25 VA and 12 V are OK but no sound from the speaker check TWR_P N FR_P N signals R609 R611 R612 R613 3 If their signals are OK follow the stage 7 1 IC304 4 If it is OK check PWM_RST signal R604 It should be high 5 If there is no problem check frequency of X600 24 576 MHz 6 If it is OK check I2S signals R618 R619 R620 If it is OK replace IC600 If it is abnormal fol...

Page 43: ...l follow the stage 1 1 IC302 2 If 25 VA and 12 V are OK but no sound from the speaker check TWL_P N FL_P N signals R602 R603 R607 R608 3 If their signals are OK follow the stage 7 1 IC304 4 If it is OK check PWM_RST signal R604 It should be high 5 If there is no problem check frequency of X600 24 576 MHz 6 If it is OK check I2S signals R618 R619 R620 If it is OK replace IC600 If it is abnormal fol...

Page 44: ... of IC501 on your eyes 2 Check 1 2 V of L309 If 1 2 V is abnormal follow the stage 4 1 IC307 3 Check 1 5 V of L308 If 1 5 V is abnormal follow the stage 8 1 IC303 4 Check D_3 3V of L313 If D_3 3V is abnormal follow the stage 6 1 IC304 5 Check the frequency of 27 MHz crystal X501 If the crystal doesn t oscillate replace X501 6 When you followed above step but it doesn t work replace the IC501 12 1 ...

Page 45: ...o troubleshoot Countermeasure 1 Check 0 75 V of C592 If voltage is abnormal follow the stage 8 1 IC300 2 Check 1 5 V of C5A5 3 If 1 5 V and 0 75 V are abnormal check the around parts C5A5 C5A6 R555 R556 4 If there s no defective component follow the stage 8 1 IC300 5 When you followed above step but it doesn t work replace the IC503 IC504 13 1 3 Service hint Any picture Remark MAIN board top view ...

Page 46: ...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 3 Even though you followed above step it doesn t work replace the IC505 14 1 3 Service hint Any picture Remark MAIN board bottom view IC505 IC505 ...

Page 47: ...ution 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 3 If problem still occurs after change JK202 check MPEG IC501 Refer to the stage 12 1 IC501 15 1 3 Service hint Any picture Remark MAIN board top view JK202 JK202 ...

Page 48: ...eck D_3 3V of L201 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 pin7 or 8 of R115 If it s Low follow the stage 9 1 IC100 4 When you followed above step but It doesn t work check the around parts Resistor Capacitor Bead If it still doesn t work replace the IC200 16 1 3 Service hint Any picture Remark MAI...

Page 49: ...ubleshoot 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 If it s weird follow the stage 9 1 IC100 4 If it still doesn t work replace the JK201 17 1 3 Service hint Any picture Remark MAIN board top view JK201 JK201 ...

Page 50: ...lace Bluetooth module 18 1 2 How to troubleshoot Countermeasure 1 Check 3 3 VA of L102 2 Check the BT_RST R161 If it s weird follow the stage 9 1 IC100 If it s OK change the BT module 3 If it still doesn t work follow the stage 12 1 IC501 18 1 3 Service hint Any picture Remark MAIN board top view CN104 CN104 ...

Page 51: ...end to change PCB 19 1 2 How to troubleshoot Countermeasure 1 Check HDMI_5V of D802 2 If It is abnormal check 5 1 VA of IC306 pin1 If it is OK replace the IC306 If it is weird follow the stage 2 1 IC300 3 If it still doesn t work follow the stage 12 1 IC501 19 1 3 Service hint Any picture Remark MAIN board top view MAIN board bottom view CN801 CN801 IC306 IC306 ...

Page 52: ...Countermeasure 1 Check Wi Fi cable state 2 If it is OK change the Wi Fi module and try again 3 If it still doesn t work check WIFI_3 6VA L315 4 If It is abnormal check 12 VA of IC301 pin3 If it is weird follow the stage 1 1 IC302 5 If it is OK check the state of WIFI_CTRL C593 It should be high 6 If it still doesn t work follow the stage 12 1 IC501 20 1 3 Service hint Any picture Remark MAIN board...

Page 53: ... set and subwoofer according to the factory reset step 2 If it is OK change the wireless module and try again 3 If it still doesn t work check WL_3V3 L314 4 If It is abnormal check 3 4 VA of IC305 pin1 If it is weird follow the stage 5 1 IC301 5 If it is OK check the state of WIFI_RST R364 If it is low state follow the stage 9 1 IC100 If it is OK replace IC305 21 1 3 Service hint Any picture Remar...

Page 54: ... 4 FR TWR CN704 pin1 2 4 5 2 Check resistor crack cold solder of PWM IC out R602 R603 R607 R608 R609 R611 R612 R613 3 If PWM IC out is ok and speaker out FL FR TWL TWR has DC Voltage Replace IC700 IC701 AMP IC on MAIN bottom board 22 1 3 Service hint Any picture Remark MAIN board bottom view MAIN board top view IC701 IC701 IC700 IC700 CN704 CN704 CN703 CN703 R602 R603 R602 R603 R607 R609 R607 R609...

Page 55: ...ltage has 8 5 V under follow the stage 1 1 2 Check GVDD VDD voltage 12 V of IC700 IC701 pin1 2 If GVDD VDD voltage has 8 5 V under follow the stage 1 1 3 Check impedance 4 Ω of speaker unit If impedance of speaker unit has 1 Ω under replace speaker unit 4 If check point 1 2 3 is ok replace IC700 IC701 AMP IC on MAIN bottom board 23 1 3 Service hint Any picture Remark MAIN board bottom view IC701 I...

Page 56: ...00 IC701 AMP IC on MAIN board 24 1 2 How to troubleshoot Countermeasure 1 Check voltage 12 V of IC700 IC701 at pin 1 if 12V has problem follow the stage 1 1 2 If 12V is OK IC700 IC701 AMP IC on MAIN bottom board 24 1 3 Service hint Any picture Remark MAIN board bottom view IC701 IC701 IC700 IC700 ...

Page 57: ...3 26 WAVEFORMS OF MAJOR CHECK POINT 1 2 1 MPEG X TAL 2 PWM X TAL FIG 1 27 MHz R510 FIG 2 24 576 MHz X600 1 2 ...

Page 58: ...3 27 3 3 MPEG FIG 3 I2S between MPEG and PWM 3 ...

Page 59: ...3 28 ...

Page 60: ...0VK19605 USB MAIN Wi Fi Wireless LCD Module 2P 1 25mm ST SMD EAG60989201 2P 1 25mm ST Non_Lock SMD 6630V901352 8P 1 25mm ST Non_Lock SMD EAG58732904 10P 1mm AG Lock SMD EAG62611102 16P 2mm ST SOCKET SMD EAG63717504 Ethernet 10P 1mm AG Lock SMD EAG62611102 16P 2mm AG HEADER DIP EAG64811002 0P mm L k SM 1 26P 0 5mm AG Lock SMD EAG61090203 BT Top side Bottom side ...

Page 61: ...SENS WIFI_P N Wi Fi OPT_DET BT_RST UART RX TX WAKE UPDATE SIG_SNS WL_MUTE EPHY_TDP N EPHY_RDP N ETHERNET 24 576 MHz SPDIF MCLK LRCK BCK M_ADC_DAT TMDS RX_HPD I2C PWR5V CEC Serial Flash CS DI DO CLK A RA 0 14 C C C MT8506 1 2 1 5 3 3V DD DTS Decoding PTB_DET AMP_PROTECT PDN SD_OTW CLIP HDMI IN I2C HPD CEC EDID_SW HDMI Out PWM_I2S_DATA LRCK BCK Flash 1MB SPI_DI DO CS CLK WP LCD_DO CLK STB BL_CTRL RM...

Page 62: ...ND PCM1808 PS9860 769mA D_3 3V 50mA MICOM DDR MT8506 1 5V 350mA SN1406035 5 1VA 1 2V 5 1VA 1 5V 670mA BD2242G HDMI BD2242G VCC_5V HDMI_5VA WIFI_3 4VA Wi Fi 930mA W BD2242G DCDC LDO PWM PWM_3 3V 13mA MT8506 USB LCD RMC 3 4VA BD2242G 160mA Efficiency values RMS output 40 8 x 2 10W 5 8 x 16 20W Peak output 40 x 2 80W 5 x 16 80W Power Measurement condition 20W 1k 0dB condition 160W Instantaneous peak ...

Page 63: ...3 36 3 35 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T MICOM EAX66934201 Rev1 2 7 MAIN 1 2015 12 28 CIRCUIT DIAGRAMS 1 MAIN MICOM CIRCUIT DIAGRAM ...

Page 64: ...3 38 3 37 3 1 WAVEFORM NUMBER A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T MPEG EAX66934201 Rev1 2 7 MAIN 2 2015 12 28 2 MAIN MPEG CIRCUIT DIAGRAM ...

Page 65: ...3 40 3 39 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T MEMORY EAX66934201 Rev1 2 7 MAIN 3 2015 12 28 3 MAIN MEMORY CIRCUIT DIAGRAM ...

Page 66: ...3 42 3 41 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ADC I O EAX66934201 Rev1 2 7 MAIN 4 2015 12 28 4 MAIN ADC I O CIRCUIT DIAGRAM ...

Page 67: ...3 44 3 43 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T DCDC EAX66934201 Rev1 2 7 MAIN 5 2015 12 28 5 MAIN DC_DC CIRCUIT DIAGRAM ...

Page 68: ...3 46 3 45 2 WAVEFORM NUMBER A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T AMP EAX66934201 Rev1 2 7 MAIN 6 2015 12 28 6 MAIN AMP CIRCUIT DIAGRAM ...

Page 69: ...3 48 3 47 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T FRONT EAX66807501 Rev1 4 6 2015 12 28 7 FRONT CIRCUIT DIAGRAM ...

Page 70: ...3 50 3 49 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T KEY EAX66807701 Rev1 4 6 2015 12 28 8 KEY CIRCUIT DIAGRAM ...

Page 71: ...0 3V 50V PVDD_CD 0 3V 50V VDD 0 3V 13 2V DVDD 0 3V 4 2V AVDD 0 3V 8 5V Measured Voltage GVDD_AB 11 92V GVDD_CD 11 93V PVDD_AB 25 30V PVDD_CD 25 29V VDD 11 92V DVDD 3 289V AVDD 7 695V IC701 AMP TAS5612LADDVR TYPE 44P VENDER TI GVDD_AB 1 GVDD_CD 22 PVDD_AB 36 37 38 PVDD_CD 29 30 31 VDD 2 DVDD 8 AVDD 13 Spec GVDD_AB 0 3V 13 2V GVDD_CD 0 3V 13 2V PVDD_AB 0 3V 50V PVDD_CD 0 3V 50V VDD 0 3V 13 2V DVDD 0...

Page 72: ...F 35V 105 2000HR 25 30V C703 C734 C738 C769 330uF 35V 105 5000HR 25 28V 3 54 3 53 2 CAPACITORS 3 CONNECTORS Test Connector Spec Connector Main Mating Connector Wireless CN100 Pin12 3V 3 6V 3 41V 3 43V Key CN103 PIN1 3V 3 6V 3 39V 3 4V WI Fi CN200 PIN1 3V 3 6V 3 36V 3 35V ...

Page 73: ...3 56 3 55 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Page 74: ...3 58 3 57 2 FRONT P C BOARD DIAGRAM 3 KEY P C BOARD DIAGRAM TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW ...

Page 75: ...3 60 3 59 ...

Page 76: ...HECK POINT 4 5 1 CRYSTAL 4 5 2 FLASH MEMORY 4 5 3 VOLTAGE 4 6 4 AMP VOLTAGE 4 7 5 PWM 4 8 6 LED 4 9 WIRING DIAGRAM 4 11 BLOCK DIAGRAM 4 13 CIRCUIT DIAGRAMS 4 15 1 WOOFER SMPS AMP SMPS CIRCUIT DIAGRAM 4 15 2 WOOFER SMPS AMP AMP CIRCUIT DIAGRAM 4 17 CIRCUIT VOLTAGE CHART 4 19 PRINTED CIRCUIT BOARD DIAGRAMS 4 21 1 WOOFER SMPS AMP P C BOARD 4 21 ...

Page 77: ...NG Replace WIC704 If you can t check PVDD voltage then replace the PCB board 1 2 3 3 VA 1 Check 3 3 VA at WL707 coil 2 If 3 3 VA is not checked at the point then find 12 VA at pin3 of WIC705 3 1 2 is NG Replace WIC705 If you can t check 12 VA voltage following the step 1 1 Woofer SMPS AMP board top view Woofer SMPS AMP board top view WL708 WL708 WIC704 WIC704 WIC705 WIC705 WL707 WL707 ...

Page 78: ...OWER ON ERROR Fundamental power check points 1 3 3 3 VA 1 Check 3 3 VA at pin1 of WIC703 2 Check 3 3V_PWM at pin6 of WIC703 3 1 2 is NG Replace WIC703 If you can t check PVDD voltage then replace the PCB board Woofer SMPS AMP board bottom view ...

Page 79: ...set MAIN SET Soundbar vol MIN and push Mute key sustain 3 5 seconds Subwofer Push Pairing key on the back case of the wireless subwoofer The LED of of the wireless subwoofer blink red and green pull out power cord The main set and the wireless subwoofer are factory reset mode then power on Woofer SMPS AMP board top view WFB604 WFB604 Wireless module Wireless module Connection check Connection chec...

Page 80: ...4 5 WAVEFORMS OF MAJOR CHECK POINT 1 CRYSTAL 2 FLASH MEMORY FIG 1 WX601 24 576 MHz FIG 2 VCC CS CLK DO 1 2 4 3 5 VCC CS CLK DO 1 2 4 5 3 ...

Page 81: ...4 6 3 VOLTAGE FIG 3 2 Woofer 12 VA FIG 3 1 Woofer PVDD 6 7 FIG 3 3 Woofer 3 3 VA 8 FIG 3 4 Woofer 3 3V_PWM 9 7 6 8 9 ...

Page 82: ...4 7 4 AMP VOLTAGE FIG 4 2 AMP_12V FIG 4 1 AMP PVDD 10 11 11 10 ...

Page 83: ...4 8 5 PWM FIG 5 2 Woofer PWM SW Signal FIG 5 1 Woofer PWM SW Signal 12 13 13 12 ...

Page 84: ...4 9 6 LED FIG 6 2 Pairing On Status Green LED FIG 6 1 Pairing Off Status Red LED 14 15 15 14 ...

Page 85: ...4 10 ...

Page 86: ...B 2P 3 96mm ST Non Lock SMD 6602V39002A 26P 0 5mm ST Non Lock SMD 6630X60142K Wireless 2P 3 96mm ST Non Lock SMD 6630VM015A2 Power Wireless Module SH4 SH5 SH5B EAT62593101 2 4G SH7 SH7B SH8 EAT63117401 5G 4 12 4 11 WIRING DIAGRAM Top Bottom ...

Page 87: ...PWM PS9860 Wireless TX Wireless RX FL LPF AMP IC TAS5612LA FR LPF AMP_PDN SW SW AMP_SD I2S I2C Reset KEY PAIRING LED RED GREEN 4 14 4 13 BLOCK DIAGRAM ...

Page 88: ...ON FROM THE LG CORPORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITE...

Page 89: ... 4 17 15 14 2 4 5 3 11 10 1 7 6 13 12 8 9 WAVEFORM NUMBER A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T AMP EAX66919101 Rev1 1 3 MAIN 1 2015 12 10 2 WOOFER SMPS AMP AMP CIRCUIT DIAGRAM ...

Page 90: ...io Amplifier TAS5612LADDVR PVDD 29 30 31 36 37 38 PVDD 12 V 34 V 20 61 V 20 64 V GVDD 1 22 GVDD 10 8 V 13 2 V 12 41 V 12 42 V VDD 2 VDD 10 8 13 2V 12 47 V 12 47 V WIC703 IC Analog Switch BD2242G VIN 1 VIN 2 8 V 5 5 V 3 42 V 3 42 V VOUT 6 VOUT 2 8 V 5 5 V 3 41 V 3 41 V WIC704 IC DC DC Converter MP1432 VIN 7 VIN 4 5 V 45 V 34 61 V 34 64 V SW 1 VOUT 0 8 V 42 V 12 53 V 12 53 V WIC705 IC DC DC Converte...

Page 91: ...4 22 4 21 PRINTED CIRCUIT BOARD DIAGRAMS 1 WOOFER SMPS AMP P C BOARD TOP VIEW BOTTOM VIEW NOTE Warning Parts that are critical with respect to risk of fire or electrical shock ...

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