LG LAS950M Service Manual Download Page 1

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SMART Hi-Fi AUDIO

Wireless Multi-room Sound Bar

SERVICE MANUAL

MODEL: LAS950M

(LAS950M, S95A1-D)

CAUTION

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

Internal Use Only

MODEL: LAS950M (LAS950M, S95A1-D)

SERVICE MANUAL

P/NO : AFN77195062

JANUARY, 2016

Summary of Contents for LAS950M

Page 1: ...i roomSoundBar SERVICE MANUAL MODEL LAS950M LAS950M S95A1 D CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Internal Use Only MODEL LAS950M LAS950M S95A1 D SERVICE MANUAL P NO AFN77195062 JANUARY 2016 ...

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

Page 3: ...ONS 1 4 GENERAL SERVICING PRECAUTIONS INSULATION CHECKING PRODEDURE ELECTROSTATICALLY SENSITIVE ES DEVICES WIRELESS SUBWOOFER CONNECTION 1 5 LAN UPDATE GUIDE 1 6 SOFTWARE UPDATE GUIDE 1 10 HOW TO WIRELESS FACTORY RESET PAIRING 1 14 HIDDEN MODE 1 14 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: ... 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 and ...

Page 7: ...1 6 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 8: ...teway 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 file name B E LG_NB_9000M06 ROM MICOM MICOM_LAS950 HEX 6 Connect Status change OK if success connect MP tool ...

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

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

Page 11: ...9000M06 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 DSP 1 Copy the firmware to USB Change the file name to DSP_LAS950 HEX 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...

Page 12: ...1 11 2 Using APP 1 Connect set and music flow app 2 Select setup update menu then you can see below menu 3 Enter Check button then display speaker list for update download ...

Page 13: ...1 12 4 Enter download button then start download to speaker 5 Display below menu after done download then enter Ready button for updating download Downloading Ready Downloaded ...

Page 14: ...1 13 6 Display below menu after done update 7 Set rebooting Booting previous version if failed update Updated ...

Page 15: ...t Volume Minimum state Remote control mute for 5 seconds Then WL RESET will be displayed on the LCD 2 Power off Main set 3 Wireless Subwoofer Wireless Reset Press and hold PAIRING key on the back of the wireless subwoofer for more than 5 seconds Then LED will be blinking Red Green 4 Power off the Wireless Subwoofer 5 Power on both 6 If the Wireless Subwoofer LED color changed Green they are paired...

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: ...tool 3 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 2 Vol key 2 Change option code by remote control ...

Page 18: ...z AMPLIFIER Total 700 W Front 75 W x 2 4 Ω at 1 kHz Rear 75 W x 2 4 Ω at 1 kHz Surround 75 W x 2 4 Ω at 1 kHz Center 75 W 4 Ω at 1 kHz Subwoofer 175 W 3 Ω at 80 Hz THD 10 WIRELESS SUBWOOFER S95A1 D Power requirements Refer to the main label on the subwoofer Power consumption 35 W Type 1 Way 1 Speaker Impedance 3 Ω Rated Input Power 175 W Max Input Power 350 W Dimensions W x H x D 296 x 332 x 296 m...

Page 19: ...1 18 ...

Page 20: ...28 WIRING DIAGRAM 2 31 BLOCK DIAGRAMS 2 33 1 POWER BLOCK DIAGRAM 2 33 2 SYSTEM BLOCK DIAGRAM 2 35 CIRCUIT DIAGRAMS 2 37 1 SMPS CIRCUIT DIAGRAM 2 37 2 MAIN MICOM CIRCUIT DIAGRAM 2 39 3 MAIN MPEG CIRCUIT DIAGRAM 2 41 4 MAIN MEMORY CIRCUIT DIAGRAM 2 43 5 MAIN ADC I O CIRCUIT DIAGRAM 2 45 6 MAIN DCDC CIRCUIT DIAGRAM 2 47 7 MAIN DSP CIRCUIT DIAGRAM 2 49 8 MAIN DAC AMP CIRCUIT DIAGRAM 2 51 9 HDMI CIRCUI...

Page 21: ... Countermeasure 1 Check if the fuse F901 is open or short circuit 2 Check if the bridge diode BD901 is short circuit by over current with a digital multimeter 3 Check if the NTC thermistor TH901 is normal or open 1 1 3 Service hint Any picture Remark F901 If F901 is not short circuit replace it with a same specifications one BD901 If BD901 is short circuit replace it with a new one TH901 If TH901 ...

Page 22: ... Check if the fuse F901 is open or short circuit 2 Check the Drain Source or Drain Gate Gate Source Resistance of Q901 with a digital multimeter If it is short condition it s destroyed Replace it with a new one Please replace FET at the same time although several FET is OK 1 2 3 Service hint Any picture Remark F901 If F901 is not short circuit replace it with a same specifications one Q901 If Q901...

Page 23: ...LED doesn t work 2 1 IC305 System 3 7 VA No 3 7 VA 2 1 1 Solution Replace IC305 on MAIN board 2 1 2 How to troubleshoot Countermeasure 1 Please check 25 VA of IC305 pin7 VIN 2 If 25 VA is abnormal please check SMPS board 3 If 25 VA is OK but 3 7 VA is abnormal at the IC305 pin1 VOUT L310 replace IC305 2 1 3 Service hint Any picture Remark MAIN board top view IC305 IC305 L310 L310 ...

Page 24: ...y LED doesn t work 2 2 IC308 System 3 3 VA No 3 3 VA 2 2 1 Solution Replace IC308 on MAIN board 2 2 2 How to troubleshoot Countermeasure 1 Please check 3 7 VA of IC308 pin3 VIN 2 If 3 7 VA is abnormal please check IC305 pin1 VOUT 3 If 3 7 VA is OK but 3 3 VA is abnormal at the IC308 pin6 VOUT replace IC308 2 2 3 Service hint Any picture Remark MAIN board top view IC308 IC308 ...

Page 25: ...work 2 3 LCD System power 5 V 6 2 VA No VCC_5V No 6 2VA 2 3 1 Solution Replace IC301 IC304 on MAIN board 2 3 2 How to troubleshoot Countermeasure 1 Please check CN401 pin7 VCC_5V pin10 6 2VA 2 If 5 V 6 2 VA is abnormal please check IC301 pin3 VOUT IC304 pin1 SW 3 If 5 V 6 2 VA is abnormal replace IC301 IC304 2 3 3 Service hint Any picture Remark MAIN board top view IC304 IC304 IC301 IC301 ...

Page 26: ...e connection on your eyes at CN100 and Wireless module 2 Please check 3 3 V of WLS_3 3V at L101 If 3 3 V is OK please check SPI signal WL_SPI_CS DO WP DI CLK of IC102 pin1 2 3 5 6 3 If you can t have no signal please replace IC102 4 If 3 is ok and proceed S W update Main set Wireless Subwoofer when set is paired 3 1 3 Service hint Any picture Remark MAIN board top view CN100 CN100 L101 L101 ...

Page 27: ...of Bluetooth module cable connection on your eyes at CN2011 and Bluetooth module 2 Please check 3 3 VA at L205 If 3 3 VA is OK please check BT_RST M_I2S_BCK BT_PCM_IN of CN2011 pin12 11 10 and BT_UART_RX BT_UART_TX pin4 6 If you have no signal please replace IC501 3 2 3 Service hint Any picture Remark MAIN board top view MAIN board bottom view CN2001 CN2001 L205 L205 ...

Page 28: ...troubleshoot Countermeasure 1 Please check 3 3 VA at L203 2 If you can check 3 3 VA please check OPT_DET signal R204 R205 when optical mode 3 In spite of process 2 set has abnormal output then replace IC501 3 3 3 Service hint Any picture Remark MAIN board top view R204 R204 L203 L203 R205 R205 IC501 IC501 ...

Page 29: ...ubleshoot Countermeasure 1 Check HDMI_5VA at pin3 of IC803 2 Check HDMI_3 3V at pin3 of IC801 3 Check HDMI_1V at pin8 of IC802 4 1 2 3 is OK Replace IC800 5 Check CN105 CN804 MAIN HDMI B to B board to board connector 6 B to B board to board connector is not good Replace B to B board to board connector CN105 CN804 3 4 3 Service hint Any picture Remark HDMI board top view CN803 CN803 CN802 CN802 CN8...

Page 30: ... 1 Check IC7001 IC7003 IC7005 IC7007 pin soldering 2 If there is short soldering on pin re soldering 3 Check DAC_3 3V at L7000 L7002 L7004 L7006 L7010 L7012 L7015 L7017 4 If soldering is ok replace IC7001 IC7003 IC7005 IC7007 3 5 3 Service hint Any picture Remark MAIN board bottom view IC7003 IC7003 IC7005 IC7005 IC7007 IC7007 IC7001 IC7001 IC802 IC802 ...

Page 31: ... Is Q901 normal Replace F901 same fuse Replace Q901 YES YES YES NO NO Is IC901 normal Check or replace D904 Is PC901 normal Is the VCC 10 28 V supplied to IC901 pin4 Is IC910 normal Is D917 normal Replace IC901 Replace D903 Replace Q903 Replace PC901 Replace IC910 Replace D917 YES NO YES YES YES YES YES NO NO NO NO NO 1 POWER SUPPLY ON SMPS BOARD ...

Page 32: ... SMPS board Check IC305 3 7 VA power line YES YES YES YES YES YES NO NO Is D301 normal Is R350 IC308 normal Is switching pulse of IC305 pin1 normal Are R351 R353 R354 normal Replace D301 Replace R350 IC308 Replace IC305 Replace R351 R353 R354 NO NO NO NO 3 7 VA power line is normal 3 3 VA power line is normal YES YES 2 POWER SUPPLY ON MAIN BOARD ...

Page 33: ...A power line Check IC305 3 7 VA power line YES YES YES YES YES YES NO NO Is there DC voltage to pin2 of IC309 Is there H 3 3 V voltage to pin3 of IC302 Is there DC voltage to pin6 of IC309 Is there DC voltage to pin5 of IC302 Check R347 Check R315 Check R348 R349 R352 Replace IC302 NO NO NO NO D_3 3V power line is normal DAC_3 3V power line is normal YES YES ...

Page 34: ...305 3 7 VA power line Check IC305 3 7 VA power line YES YES YES YES YES YES NO NO Is there H 3 3 V voltage to pin3 of IC303 Is there H 3 3 V voltage to pin2 of IC307 Is there DC voltage to pin5 of IC303 Is there DC voltage to pin6 of IC307 Check R318 Check R327 Replace IC303 Replace IC307 NO NO NO NO WLS_3 3V power line is normal WIFI_3 5VA power line is normal YES YES ...

Page 35: ... SMPS board Check IC304 6 2 VA power line YES YES YES YES YES YES NO NO Is D300 normal Is there H 3 3 V voltage to pin1 of IC301 Is switching pulse of IC304 pin1 normal Is there DC voltage to pin3 of IC301 Replace D300 Check R314 Replace IC304 Replace R317 R320 R355 IC301 NO NO NO NO 6 2 VA power line is normal VCC_5V power line is normal YES YES ...

Page 36: ...wer line Check IC304 6 2 V power line YES YES YES YES YES YES NO NO Is there H 3 3 V voltage to pin6 15 of IC300 Is there H 3 3 V voltage to pin6 15 of IC300 Is switching pulse of IC300 pin12 normal Is switching pulse of IC300 pin9 normal Check R306 R307 Check R306 R307 Replace IC300 Replace IC300 NO NO NO NO 1 5 V power line is normal 1 2 V power line is normal YES YES ...

Page 37: ...k IC305 3 7 VA power line Check IC801 HDMI_3 3V power line YES YES YES YES YES YES NO NO Is there H 3 3 V voltage to pin1 of IC801 Is there DC voltage to pin8 of IC802 Is there DC voltage to pin3 of IC801 Check R848 Replace R852 R853 IC802 Replace R847 R849 R850 IC801 NO NO NO HDMI_3 3V power line is normal HDMI_1V power line is normal YES ...

Page 38: ...AIN Board FRONT Board Check IC305 IC308 and SMPS board Check IC305 IC308 STAND BY LED OK Pin1 of IC305 and pin6 of IC308 are OK 3 3 VA OK NO NO NO YES YES Proper cable connect MAIN to FRONT cable connection OK NO YES 3A Check MICOM S W download Check Q402 LD400 3B ...

Page 39: ...nection LCD module Check Q403 Assemble properly HELLO Display on LCD OK Signal EEPROM_CLK DAT OK Signal MICOM_UART_TX MICOM_UART_RX OK 6 2 VA VCC_5V F_3 3VA OK Signal LCD_DO CLK STB OK Signal BL_CTL OK Proper assemble MAIN FRONT and KEY board OK NO NO NO NO NO NO NO YES YES YES YES YES YES YES 3C 3C 3C 3B 3A 3C System part OK ...

Page 40: ...41 44 49 52 of IC600 signal OK CN2011 pin1 3 3 VA OK Pin6 7 of IC7001 IC7003 IC7005 IC7007 signal OK Pin21 23 27 29 of IC7000 IC7002 IC7004 IC7006 signal OK CN2011 I2S signal OK Check IC600 DSP or replace Check L205 3 3 VA line Check each DAC IC or replace Check each AMP IC or replace Check BT I2S signal line NO NO NO NO NO Replace MAIN board Replace BT module YES YES YES 4 NO AUDIO OUTPUT ...

Page 41: ...JK204 Replace CN200 YES YES YES YES YES YES NO NO JK201 JK204 pin3 3 3 VA OK CN200 pin6 WIFI_ 3 5VA OK OPT1 2_DET OPT1 2_SPDIF signal OK Wi Fi Connection is OK Check L203 3 3 VA line Check WIFI_3 5VA line Check OPT_SPDIF OPT_DET signal line Check Wi Fi cable connection NO NO NO NO Replace IC501 Replace Wi Fi module YES YES ...

Page 42: ...n18 HDMI_5 5VA OK X800 27 MHz OK CN803 pin19 HP_DET about 2 0 5 3 V OK IC100 HDMI_SCL SDA PWR_CTRL CEC OK IC800 1 0 V 3 3 V OK Is there signal on TMDS Check D812 HDMI_5 5VA line Check X800 or replace Check hot plug detect signal from TV Check IC100 Check IC801 IC802 IC803 Check TMDS trace from IC800 NO NO NO NO NO NO HDMI output OK YES YES YES YES 5 NO HDMI OUTPUT ...

Page 43: ...2 24 WAVEFORMS OF MAJOR CHECK POINT 1 ADC I2S WAVEFORM IC200 M_I2S_MCLK Waveform 24 576 MHz PIN6 M_I2S_LRCK Waveform 48 00 MHz PIN7 M_I2S_BCK Waveform 3 072 MHz PIN8 M_ADC_DATA Waveform PIN9 ...

Page 44: ...I2S WAVEFORM IC600 DSP_I2S_BCK Waveform 12 288 MHz PIN40 DSP_I2S_FL_RL C_FW FR_RR BL_BR Waveform Rising time PIN44 49 52 DSP_I2S_LRCK Waveform 192 KHz PIN39 DSP_I2S_FL_RL C_FW FR_RR BL_BR Waveform Rising time PIN44 49 52 ...

Page 45: ...2 26 3 LCD DATA LINE OUTPUT WAVEFORM IC100 LCD_DO Waveform PIN44 LCD_CLK Waveform PIN46 LCD_STB Waveform PIN45 ...

Page 46: ...2 27 4 RMC WAVEFORM RMC LEAD CODE TIMING SPEC 4 5 ms RMC BIT CODE TIMING SPEC 0 56 ms RMC LEAD CODE TIMING SPEC 4 5 ms ...

Page 47: ...2 28 5 I2C WAVEFORM UART_TX MICOM MPEG SPI_CLK MICOM DSP UART_RX MICOM MPEG SPI_DAT MICOM DSP ...

Page 48: ...2 29 I2C WAVEFORM HDMI_SCL MICOM HDMI DSP_OUTPUT_BCK DSP DAC x 4 Wireless HDMI_SDA MICOM HDMI DSP_OUTPUT_LRCK DSP DAC x 4 Wireless ...

Page 49: ...2 30 ...

Page 50: ..._Lock SMD 6630V901352 2P 1 25mm ST Lock SMD EAG60989201 8P 2 0mm ST SMD 8P 2 50mm Board IN Type 2P 2mm ST Lock SMD EAG63514501 6P 2mm ST Lock SMD EAG63270201 2 S E 16P 1mm ST Non_Lock SMD 6630XE00116 10P 1mm AG Lock SMD EAG62611102 20P 2mm ST SOCKET SMD EAG63717506 20P 2mm DIP HEADER SMD Download Connector MTK Download 殯 4P 2mm ST Non_Lock SMD MICOM Download 殯 5P 1mm ST Non Lock SMD DSP Download 殯...

Page 51: ...UBBER BLOCK D902 C964 C930 R915 R957 BC901 DRIVE S W BLOCK IC101 D104 R105 R102 C108 C109 ZD101 ZD102 C113 Y CAP C903 Y CAP C901 RECTIFIER SMOOTING BLOCK D917 C951 C952 C953 25 VA ON V CTRL OPT Not Used 12 VA STAND BY TH901 FEED BACK BLOCK R931 R920 R949 R930 R928 R914 C919 R907 R912 Q904 IC910 BLOCK DIAGRAMS 1 POWER BLOCK DIAGRAM ...

Page 52: ... 2 1 5 3 3 V DD DTS Decoding PTB_DET AMP_PDN SD CLIP MUTE HDMI IN1 EDID_I2C CEC EDID_SW HPD_MICOM HDMI OUT M_I2S_DATA2 LRCK BCK Flash 1 MB SPI_DI DO CS CLK WP LCD_DO CLK STB BL_CTRL RMC TPA3116D2 TPA3116D2 TPA3116D2 TPA3116D2 LAS950M 525W 75 W 7EA FRONT Wireless Woofer 27 MHz OPTICAL IN2 OPT2_SPDIF OPT2_DET NAND 512 MB HDMI Sil9533 TMDS HPD EDID_I2C ARC CEC TMDS1 RX_HPD1 EDID_I2C PWR5V_1 HDMI IN2 ...

Page 53: ... 1 SMPS CIRCUIT DIAGRAM WHEN SERVICING THIS CHASSIS UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION 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...

Page 54: ...2 40 2 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 MICOM EAX66206501 Rev1 3 11 MAIN 1 2014 12 10 2 MAIN MICOM CIRCUIT DIAGRAM ...

Page 55: ...2 42 2 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 MPEG EAX66206501 Rev1 3 11 MAIN 2 2014 12 10 3 MAIN MPEG CIRCUIT DIAGRAM ...

Page 56: ...2 44 2 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 MEMORY EAX66206501 Rev1 3 11 MAIN 3 2014 12 10 4 MAIN MEMORY CIRCUIT DIAGRAM ...

Page 57: ...2 46 2 45 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 EAX66206501 Rev1 3 11 MAIN 4 2014 12 10 5 MAIN ADC I O CIRCUIT DIAGRAM ...

Page 58: ...2 48 2 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 DCDC EAX66206501 Rev1 3 11 MAIN 5 2014 12 10 6 MAIN DCDC CIRCUIT DIAGRAM ...

Page 59: ...2 50 2 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 DSP EAX66206501 Rev1 3 11 MAIN 6 2014 12 10 7 MAIN DSP CIRCUIT DIAGRAM ...

Page 60: ...2 52 2 51 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 DAC AMP EAX66206501 Rev1 3 11 MAIN 7 2014 12 10 8 MAIN DAC AMP CIRCUIT DIAGRAM ...

Page 61: ...2 54 2 53 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 HDMI EAX66166301 Rev1 3 11 2014 12 10 9 HDMI CIRCUIT DIAGRAM ...

Page 62: ...2 56 2 55 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 EAX66225701 Rev1 3 11 2014 12 10 10 FRONT CIRCUIT DIAGRAM ...

Page 63: ...2 58 2 57 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 EAX66166401 Rev1 3 11 2014 12 10 11 KEY CIRCUIT DIAGRAM ...

Page 64: ...0 775V N8 0 775 IC503 DDR VDD 1 425 1 575 B2 D9 G7 K2 K8 N1 N9 R1 R9 1 552 VREFCA 0 49 VDD 0 51 VDD M8 H1 0 775 VDDQ 1 425V 1 575V A1 A8 C1 C9 D2 E9 E1 H2 H9 1 552 IC504 DDR VDD 1 425 1 575 B2 D9 G7 K2 K8 N1 N9 R1 R9 1 552 VREFCA 0 49 VDD 0 51 VDD M8 H1 0 775 VDDQ 1 425V 1 575V A1 A8 C1 C9 D2 E9 E1 H2 H9 1 552 IC505 NAND VCC 2 7V 3 6V 12 37 3 366 IC600 AVDD 1 2V 3 3V 2 7 15 18 38 56 3 29 DVDD 1 14...

Page 65: ...00 WLS_3V3 1 3 62 Wireless CN104 VCC_5V 13 5 08 FRONT 6 2VA 14 6 17 3 7VA 15 16 3 67 CN105 6 2VA 1 6 18 HDMI 3 7VA 2 3 67 VCC_5V 5 5 07 D_3 3V 8 3 29 CN200 WIFI_3 5VA 6 3 67 WIFI CN300 25VA 1 2 3 25 3 SMPS CN2011 3 3VA 1 3 28 BT HDMI CN804 6 2VA 1 6 18 MAIN 3 7VA 2 3 67 VCC_5V 5 5 07 D_3 3V 8 3 29 FRONT CN400 VCC_5V 13 5 08 MAIN 6 2VA 14 6 17 3 7VA 15 16 3 66 CN401 F_3 3VA 4 6 3 44 LCD VCC_5V 7 5 ...

Page 66: ...2 64 2 63 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 ...

Page 67: ...2 66 2 65 2 MAIN P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Page 68: ...2 68 2 67 3 HDMI P C BOARD DIAGRAM 4 FRONT P C BOARD DIAGRAM 5 KEY P C BOARD DIAGRAM TOP VIEW TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW BOTTOM VIEW ...

Page 69: ...2 70 2 69 ...

Page 70: ...3 1 SECTION 3 CABINET MAIN CHASSIS CONTENTS DISASSEMBLY INSTRUCTIONS 3 3 EXPLODED VIEWS 3 9 1 MAIN SET SECTION 3 9 2 WIRELESS SUBWOOFER SECTION 3 11 3 PACKING ACCESSORY SECTION 3 13 ...

Page 71: ... Bottom Assembly 1 Remove the 20 screws on the main set 2 Remove the Cover Bottom Assembly 2 Cover Back 1 Remove the 11 screws securing the Cover Back 2 Detach the power cord from the Cover Back 3 Remove the Cover Back Fig 2 Fig 1 1 1 3 1 Cover Back Power Cord 2 1 2 Cover Bottom Assembly ...

Page 72: ...the Key Board 4 Remove the 2 screws securing the Key Board 5 Remove the Key Board 3 Chassis Main Assembly 1 Remove the 10 screws securing the Chassis Main Assembly 2 Disconnect the Harness FFC cables from the Main Board 3 Remove the Chassis Main Assembly Fig 4 Fig 3 1 2 3 4 Bracket Button Button KEY KEY KEY 1 1 2 2 3 Chassis Main Assembly MAIN MAIN MAIN ...

Page 73: ...Board 6 Remove the Main Board 5 SMPS Board 1 Disconnect the Harness cable from the Main Board 2 Remove the 4 screws securing the SMPS Board 3 Remove the SMPS Board 6 Bluetooth Module 1 Disconnect the FFC cable from the Main Board 2 Remove the Bracket BT 3 Remove the Bluetooth Module Fig 6 Fig 5 6 1 3 3 3 3 4 1 5 2 MAIN MAIN MAIN HDMI HDMI HDMI Chassis Cover Chassis Cover Chassis Cover Chassis jack...

Page 74: ...3 5 7 Cover Top Assembly 1 Remove the 10 screws securing the Cover Top Assembly 2 Remove the Cover Top Assembly Fig 7 1 2 Cover Top Assembly Reassembly CAUTION ...

Page 75: ...odule 9 Wireless Module 1 Remove the 2 screws securing the Wireless Module 2 Disconnect the FFC cable from the Wireless Module 3 Remove the Wireless Module 10 Case Chamber Assembly 1 Remove the 6 screws securing the Case Chamber Assembly 2 Remove the Case Chamber Assembly Fig 8 1 1 2 Case Chamber Assembly 1 2 1 2 Wi Fi Module Wireless Module ...

Page 76: ...he 4 screws securing the Front Board 2 Remove the Front Board 11 Case Back Center 1 Remove the 8 screws securing the Case Back Center 2 Detach the EMI Gasket 3 Remove the Case Back Center Fig 10 Fig 9 2 1 1 FRONT FRONT FRONT 3 1 2 ...

Page 77: ...3 8 ...

Page 78: ...64 320 464 464 470 470 254 464 464 470 253 252 250 470 330 331 464 263 261 464 465 280 282 281L 256 470 282 281R 464 464 A41 464 260 464 464 464 464 WIRELESS F A54 CABLE4 CABLE3 CABLE5 464 464 464 464 464 331 262 EXPLODED VIEWS 1 MAIN SET SECTION NOTES THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN ...

Page 79: ...3 393 392 392 384 393 385 387 395 390 388 388 395 386 WIRELESS LED KEY AMP SMPS F 389 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 ...

Page 80: ...3 Main packing 801 Owner s manual 835 Wall bracket 806 Optical cable 837 Cover foot 2 829 Cable tie 900 Remote control 839 IR Blaster 836 Screws 2 808 Batteries 2 823 HDMI cable 831 LAN cable 3 PACKING ACCESSORY SECTION ...

Page 81: ...3 16 3 15 ...

Page 82: ... 12 V 5 VA 4 4 3 POWER ON ERROR 3 3 VA 3 V 4 5 4 WIRELESS CONNECTION 4 6 CIRCUIT DIAGRAMS 4 7 1 WOOFER SMPS CIRCUIT DIAGRAM 4 7 2 WOOFER AMP CIRCUIT DIAGRAM 4 9 3 WOOFER KEY CIRCUIT DIAGRAM 4 11 PRINTED CIRCUIT BOARD DIAGRAMS 4 13 1 WOOFER SMPS P C BOARD 4 13 2 WOOFER AMP P C BOARD 4 15 3 WOOFER KEY P C BOARD 4 15 ...

Page 83: ... 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 1 1 3 Service hint Any picture Remark Woofer SMPS board top view Fuse F901 Can look at physical condition BD901 BD901 F901 F901 ...

Page 84: ... 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 1 2 3 Service hint Any picture Remark Woofer SMPS board top view D951 D951 IC901 IC901 ...

Page 85: ...oltage then you replace woofer SMPS board 2 2 5 VA 1 Check 5 VA at WFC601 2 If 5 VA is not checked at the point then find PVDD at pin1 of WIC606 3 1 2 is NG Replace WIC606 If you can t check PVDD voltage then you replace woofer SMPS board Woofer AMP board top view Woofer AMP board top view 12 V 12 V at WFC602 at WFC602 PVDD PVDD at pin1 of WIC607 at pin1 of WIC607 PVDD PVDD at pin1 of WIC606 at pi...

Page 86: ...VA at pin7 8 of WIC603 3 Check 3 3V_PWM at WL611 nearby WIC608 4 Check 3 3V_PWM at WL615 nearby WIC601 If all voltages are OK then check the PVDD voltage of woofer SMPS board Woofer AMP board top view 3 3V_PWM 3 3V_PWM at WL615 at WL615 3 3 VA 3 3 VA at pin7 8 of WIC603 at pin7 8 of WIC603 3 3 VA 3 3 VA at WL613 at WL613 3 3V_PWM 3 3V_PWM at WL611 at WL611 ...

Page 87: ...and push Mute key sustain 3 5 sec 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 KEY board top view Woofer AMP board top view 3 3 VA 3 3 VA at WL616 at WL616 Wireless module Wireless module Connection check Connection...

Page 88: ...G THIS CHASSIS UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION 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 ...

Page 89: ...4 10 4 9 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 WF AMP EAX65142702 Rev1 0 0 2014 01 28 2 WOOFER AMP CIRCUIT DIAGRAM ...

Page 90: ...4 12 4 11 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J WF KEY EAX65385101 Rev1 0 0 2014 01 28 3 WOOFER KEY CIRCUIT DIAGRAM ...

Page 91: ...4 14 4 13 PRINTED CIRCUIT BOARD DIAGRAMS 1 WOOFER SMPS P C BOARD TOP VIEW BOTTOM VIEW NOTE Warning Parts that are critical with respect to risk of fire or electrical shock ...

Page 92: ...4 16 4 15 2 WOOFER AMP P C BOARD 3 WOOFER KEY P C BOARD TOP VIEW BOTTOM VIEW ...

Page 93: ...4 18 4 17 ...

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