LG LAS454B Скачать руководство пользователя страница 62 | Manualshive

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WF-SMPS

EAX66172301 Rev1.2(14)

2015.11.17

Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.

No Power

BD901 is Defective

No Power

D901 is Defective

No Power

Q901 is Defective

No Power

Q920 is Defective

No Power

D951 is Defective

No Power

F901 is Defective

Switching Error

IC901 is Defective

Switching Error

PC901 is Defective

Switching Error

IC951 is Defective

Switching Error

Q951 is Defective

CIRCUIT DIAGRAMS

1. WOOFER 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 USED. THIS
WAY, IMPLEMENTATION OF THE LATEST SAFETY
AND PERFORMANCE IMPROVEMENT CHANGES
INTO THE SET IS NOT DELAYED UNTIL THE NEW
SERVICE LITERATURE IS PRINTED.

1. Shaded( ) parts are critical for safety. Replace only

with specified part number.

2. Voltages are DC-measured with a digital voltmeter

during Play mode.

IMPORTANT SAFETY

NOTE :

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Содержание LAS454B

Страница 1: ...ON BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Internal Use Only Website http biz lgservice com 2 1 ch Wireless Sound Bar NOVEMBER 2015 P NO AFN77195019 MODEL LAS454B LAS454B S55A3 D MODEL LAS454B LAS454B S55A3 D ...

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

Страница 3: ...1 2 SECTION 1 GENERAL CONTENTS ESD PRECAUTIONS 1 3 WIRELESS SUBWOOFER CONNECTION 1 4 HIDDEN KEY MODE 1 5 MCS EQ HIDDEN KEY GUIDE 1 6 MCS EQ PROGRAM UPDATE GUIDE 1 7 SPECIFICATIONS 1 8 ...

Страница 4: ...harges sufficient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparabl...

Страница 5: ...standby LED on the main unit blinks quickly 3 If the LED of the wireless subwoofer already blinks in yellow 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 yellow green 4 Disconnect the power cord of the main unit and the wireless subwoofer 5 Connect them...

Страница 6: ... POWER OFF Setting VOL Exit STANDARD CLIP Algorithm Edit Main unit Volume Remote control VOL Wireless RF Change Main unit Volume Remote control WOOFER LEVEL BYPASS Sound Effect Main unit Volume Remote control DRC ON APD Time Display Main unit Volume Remote control DRC OFF APD On Off Main unit Volume Remote control AUTO POWER ON Up VOL Down VOL Right VOICE Left STANDARD Enter CINEMA TV Remote ON Re...

Страница 7: ...ossible to connect wireless subwoofer Ex 6 Press remote control VOICE key 1 time Check EQ version Ex 7 Press remote control VOICE key 1 time Check option Press remote control VOL Up VOL Down STANDARD Left VOICE Right key Ex 8 Power cord unplug 2 EEPROM Initialize Please connect the Display Jig to the main unit 1 Power on 2 Press main unit volume key and remote control VOICE during 3 seconds 3 Disp...

Страница 8: ... USB driver is E 2 Update Please connect the Display Jig to the main unit 1 Power on 2 Press main unit volume key and remote control VOL during 3 seconds USB Mode 3 Insert USB 4 Display in VFD MCS MCS UP FINISH Power off EQ EQ UP FINISH Power off Wireless Tx UPDATE WR XX Progress FINISH Power off Wireless Rx UPDATE SEND XX Progress FINISH Power off 5 Loading is shown while updating Never remove US...

Страница 9: ...jack x 1 Available Digital Input Audio Sampling Frequency 32 kHz 44 1 kHz 48 kHz 88 2 kHz 96 kHz Available Digital Input Audio format Dolby Digital DTS Digital Surround PCM AMPLIFIER RMS OUTPUT POWER Total 300 W Front 50 W 50 W 4 Ω at 1 kHz 10 THD Subwoofer 200 W 3 Ω at 80 Hz 10 THD WIRELESS SUBWOOFER S55A3 D Power requirements 120 V 60 Hz Power consumption 33 W Type 1 Way 1 Speaker Impedance 3 Ω ...

Страница 10: ...2 1 SECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 3 1 MAIN SET SECTION 2 3 2 WIRELESS SUBWOOFER SECTION 2 5 3 PACKING ACCESSORY SECTION 2 7 ...

Страница 11: ...2 2 ...

Страница 12: ...FRONT WIRELESS 252 CABLE2 G F 264 264 258 A43 257 A52 B T F 255 D CABLE1 D E B A 502 A46 CABLE3 MAIN G 463 C 300 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 SERVICE LITERATURE ...

Страница 13: ... 951 957 956 956 A900W A45W A54W A47W 952 CN901 953 A49W 960 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 ...

Страница 14: ...802 Box 803 Packing Main 801 Owner s manual 900 Remote control 804 Bag 808 Batteries 2 835 Wall bracket 806 Optical cable 3 PACKING ACCESSORY SECTION ...

Страница 15: ...2 8 ...

Страница 16: ...REMOTE CONTROL 3 15 6 OPTICAL 3 16 7 PORTABLE 3 17 8 AUDIO PWM 3 18 9 AUDIO AMP 3 20 WIRING DIAGRAM 3 21 BLOCK DIAGRAMS 3 23 1 SYSTEM BLOCK DIAGRAM 3 23 2 POWER BLOCK DIAGRAM 3 25 CIRCUIT DIAGRAMS 3 27 1 SMPS CIRCUIT DIAGRAM 3 27 2 MAIN DSP CIRCUIT DIAGRAM 3 29 3 MAIN INTERFACE CIRCUIT DIAGRAM 3 31 4 MAIN PWM AMP CIRCUIT DIAGRAM 3 33 5 MAIN POWER CIRCUIT DIAGRAM 3 35 6 FRONT CIRCUIT DIAGRAM 3 37 C...

Страница 17: ...er on the unit 1 1 Solution Replace SMPS board 1 2 How to troubleshoot Countermeasure 1 Check the PVDD voltage 24 V at pin4 5 6 When you check the no power at this point then replace SMPS board 1 3 Service hint Any picture Remark MAIN board top view PVDD PVDD CN601 pin4 5 6 CN601 pin4 5 6 ...

Страница 18: ... If 3 3 VA is not checked at the point then find 12 V at pin5 of IC606 3 1 2 is NG Replace IC606 2 3 Q601 1 Check 12 V at the Collector of Q601 pin2 2 If 12 V is not checked at the point then find 11 V at the Base of Q601 pin3 3 1 2 is NG Replace Q601 MAIN board top view MAIN board top view MAIN board top view L604 L604 L618 L618 Q601 Q601 pin2 collector pin2 collector pin3 base pin3 base IC603 pi...

Страница 19: ...the soldering status of JK502 2 Please check L501 L502 POR_L POR_R signal of portable jack JK502 If you can t find input signal replace JK502 3 If you can find input signal check pin13 14 of IC508 4 If you can t find signal at pin13 14 of IC508 replace IC508 3 3 Service hint Any picture Remark MAIN board bottom view JK502 JK502 L501 L502 L501 L502 IC508 IC508 ...

Страница 20: ... CN506 and Wireless module 2 Please check 3 3 V of WL_3V3 at L509 If 3 3 V is ok at L509 please check SPI signal WL_SPI_CS D0 WP DI CLK of IC505 pin1 2 3 5 6 3 If you can t have no signal please replace IC505 4 If 3 is OK then proceed S W update Update Wireless TX Main set and Wireless RX Subwoofer each 4 3 Service hint Any picture Remark MAIN board top view MAIN board bottom view IC505 IC505 L509...

Страница 21: ... Bluetooth cable connection on your eyes at CN508 and Bluetooth module 2 Please check 3 3 V of 3 3VA at L504 If 3 3 V is OK at L504 please check BT_SDA BT_SCL BT_RST pin53 51 25 of IC502 and BT_RX BT_TX pin29 27 If you have no signal please replace IC502 5 3 Service hint Any picture Remark MAIN board top view MAIN board bottom view IC502 IC502 L504 L504 CN508 CN508 ...

Страница 22: ...t Countermeasure 1 Please check 3 3 V of 3 3VA at L503 If you can check 3 3 V please confirm OPT_DET signal R5R8 in MAIN board when optical mode 2 In spite of process 1 set has abnormal output then replace IC507 6 3 Service hint Any picture Remark MAIN board top view JK501 JK501 IC507 IC507 L503 L503 R5R8 R5R8 ...

Страница 23: ... power on again 3 Check DC Voltage of speaker out FL CN703 pin1 2 FR CN704 pin1 3 4 Check resistor crack cold solder of PWM IC out R751 R753 R759 R761 5 If PWM IC out is ok and speaker out FL FR has DC Voltage Replace IC703 AMP IC on MAIN bottom board 7 3 Service hint Any picture Remark MAIN board top view MAIN board bottom view CN703 CN703 CN704 CN704 IC701 PWM IC IC701 PWM IC IC703 AMP IC IC703 ...

Страница 24: ...01 pin4 5 6 If PVDD voltage has 8 5 V under refer to SMPS board repair guide page 3 2 4 Check GVDD VDD voltage 12 V of IC703 pin1 2 If GVDD VDD voltage has 8 5 V under refer to 12 V no power repair guide page 3 3 5 Check impedance 4 Ω of speaker unit If impedance of speaker unit has 1 Ω under replace speaker unit 6 If check point 3 4 5 is ok replace IC703 AMP IC on MAIN bottom board 8 3 Service hi...

Страница 25: ...T power off check Red LED blink at intervals of 0 5 sec B Protection 2 Turn MAIN SET power on again 3 Check voltage 3 3 V of AMP_PROTECT signal pin2 of Q701 4 If pin2 of Q701 is Low 0 V replace IC703 AMP IC on MAIN bottom board 9 3 Service hint Any picture Remark MAIN board top view MAIN board bottom view Q701 Q701 Pin2 Pin2 IC703 AMP IC IC703 AMP IC ...

Страница 26: ...3 11 WAVEFORMS OF MAJOR CHECK POINT 1 CRYSTAL FIG 1 1 X501 24 MHz 1 FIG 1 2 X502 X701 24 576 MHz 2 1 2 2 ...

Страница 27: ...3 12 2 FLASH MEMORY FIG 2 VCC CS CLK DO 3 4 5 6 6 5 4 3 VCC CS CLK DO ...

Страница 28: ...3 13 3 TACT KEY FIG 3 2 Press FUNC Key 0 72 0 82 V FIG 3 1 Press Power Key 1 1 13 V 7 8 FIG 3 3 Press VOL Key 0 424 0 485 V 9 FIG 3 4 Press VOL Key 0 V 10 8 10 7 9 ...

Страница 29: ...3 14 4 USB FIG 4 1 USB_5V 11 FIG 4 2 USB D 12 FIG 4 3 USB D 13 11 13 12 ...

Страница 30: ...NTROL FIG 5 1 Input Voltage 14 FIG 5 2 Low Timing 15 Item Measured Spec Input Level 3 3 V IR Receiver Spec 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 High Timing 16 15 16 14 ...

Страница 31: ...3 16 6 OPTICAL FIG 6 1 OPT_IN 17 FIG 6 2 OPT_DET 18 18 17 ...

Страница 32: ...3 17 7 PORTABLE FIG 7 1 ADC IC 5 V 19 FIG 7 2 ADC IC 3 3 V 20 FIG 7 3 Analog Input Voltage 1 1 27 Vrms 21 21 19 20 ...

Страница 33: ...3 18 8 AUDIO PWM 1 2 FIG 8 2 PWM IC 1 2 V FIG 8 1 PWM IC 3 3 V 22 23 FIG 8 3 BCK 24 FIG 8 4 LRCK 25 23 24 25 22 ...

Страница 34: ...3 19 AUDIO PWM 2 2 FIG 8 5 Front L 384 14 kHz FL FL 26 FIG 8 6 Front R 384 17 kHz FR FR 27 26 27 ...

Страница 35: ...3 20 28 30 29 9 AUDIO AMP FIG 9 1 AMP IC PVDD PVDD 24 V 28 FIG 9 2 PVDD GVDD AMP_PDN 1S 28 29 30 ...

Страница 36: ... L SMD 3pin Audio R DIP 6pin B to B Main to SMPS SMD 26pin Main to Wireless FFC Wireless module BT module SMD 10pin Main To BT FFC SMD 10pin Main To Front FFC DIP 2pin Power Cord SMPS PCB Main PCB Front PCB LED Tact Key RCU receiver WIRING DIAGRAM ...

Страница 37: ...ET AMP_P_CTRL 50 W AMP TAS5612 AUDIO OUT AUDIO IN LED DC to DC LDO Reset IC MLC3730 CS8422 DIR_LRCK BCK ADATA DIR_CSD TEMP RCBL INT DIR_RST OPT_DET PORT_DET OPT_IN PCM1808 Portable IN Optical IN DIR_SDA SCL ADC_ADATA ADC_BCK LRCK LFE_P N MAIN_PWR_CTRL DRV_VBUS2 0 DIR_MCLK PORT_L R WL_INT CSR8811 BT_CTS RTS BT_SCL SDA BT_RST Wireless Rx PWM_TX_LRCK BCK ADATA2 WL_SPI MUTE CLK DAT MSG_RDY Option BLOC...

Страница 38: ..._1 2VA PLL_1 2VA Switch BD2242G 1 2 VA MLC3730 WIRELESS Module PWM PS9860 DIR CS8422 USB For update VCC_3 3V WL_3V3 3 3 VA BT Module ADC PCM1808 PWM_3 3V VCC_3 3V RCU 3 3 VA OPTICAL 3 3 VA AVCC_5V VCC_3 3V DCDC TPS563200 DCDC TPS563200 Option AMP_P_CTRL MAIN_PWR_CTRL WL_PWR_CTRL Switching TR 12 VA DRV_VBUS2 0 2 POWER BLOCK DIAGRAM ...

Страница 39: ... 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 LITERATURE IS P...

Страница 40: ...30 3 29 21 19 20 2 18 17 8 10 7 9 6 5 4 3 1 13 12 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 DSP EAX66789701 Rev1 3 12 MAIN 2 2015 07 08 2 MAIN DSP CIRCUIT DIAGRAM ...

Страница 41: ...3 32 3 31 3 MAIN INTERFACE CIRCUIT DIAGRAM 11 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 INTERFACE EAX66789701 Rev1 3 12 MAIN 3 2015 07 08 ...

Страница 42: ...3 34 3 33 2 23 24 25 22 26 28 30 29 27 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 PWM AMP EAX66789701 Rev1 3 12 MAIN 4 2015 07 08 4 MAIN PWM AMP CIRCUIT DIAGRAM ...

Страница 43: ...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 POWER EAX66789701 Rev1 3 12 MAIN 5 2015 07 08 5 MAIN POWER CIRCUIT DIAGRAM ...

Страница 44: ...3 38 3 37 15 16 14 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 FRONT EAX66769801 Rev1 2 5 2015 07 08 6 FRONT CIRCUIT DIAGRAM ...

Страница 45: ...VA 3 V_REG 19 VL 1 71 V 5 25 V VA 3 135 V 3 465 V V_REG 3 135 V 3 456 V VL 3 32 V VA 3 32 V V_REG 3 32 V IC508 IC A D Converter PCM1808 VCC 3 VDD 4 VCC 4 5 V 5 5 V VDD 2 7 V 3 6 V VCC 5 08 V VDD 3 32 V IC603 IC DC DC Converter MP1432 VIN 7 VIN 4 5 V 45 V VIN 25 2 V IC604 IC605 IC606 IC DC DC Converter TPS563200 VIN 3 SW 2 VIN 4 5 V 17 V SW 0 76 V 7 V VIN 12 01 V SW 1 22 V 5 15 V 3 35 V IC607 IC608...

Страница 46: ...terface CN508 Connector Wafer FFC 10031HR H10 10P 1 00MM 1R ANGLE SMD T REEL NATURAL Main to Front for CM2820 YEON HO ELECTRONICS CO LTD 10 3 3 V 3 31 V BLUETOOTH Interface CN601 Connector BtoB 25032HS H06F1 TR 6P 2 50MM STRAIGHT SOCKET DIP TRAY 7 9mM LAS550H YEON HO ELECTRON ICS CO LTD 4 5 6 PVDD 24 V from SMPS CN705 Connector FFC 10031HR H10 10P 1 00MM 1R ANGLE SMD T REEL NATURAL Main to Front f...

Страница 47: ...3 44 3 43 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 ...

Страница 48: ...3 46 3 45 2 MAIN P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Страница 49: ...3 48 3 47 3 FRONT P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Страница 50: ...WAVEFORMS OF MAJOR CHECK POINT 4 6 1 VOLTAGE 4 6 2 AMP VOLTAGE 4 7 3 PWM 4 8 4 LED 4 9 WIRING DIAGRAM 4 11 BLOCK DIAGRAM 4 13 CIRCUIT DIAGRAMS 4 15 1 WOOFER SMPS CIRCUIT DIAGRAM 4 15 2 WOOFER AMP CIRCUIT DIAGRAM 4 17 3 WOOFER KEY CIRCUIT DIAGRAM 4 19 PRINTED CIRCUIT BOARD DIAGRAMS 4 21 1 WOOFER SMPS P C BOARD 4 21 2 WOOFER AMP P C BOARD 4 23 3 WOOFER KEY P C BOARD 4 23 ...

Страница 51: ...D voltage is not checked replace woofer SMPS board 1 2 Service hint Any picture Remark Woofer AMP board bottom view Woofer AMP board top view PVDD PVDD pin3 4 5 6 at WCN601 pin3 4 5 6 at WCN601 PVDD PVDD pin7 at WIC606 pin7 at WIC606 Nearby WC610 Nearby WC610 PVDD PVDD pin7 at WIC607 pin7 at WIC607 Nearby WC686 Nearby WC686 PVDD PVDD at WCA601 at WCA601 ...

Страница 52: ...tage then you replace woofer SMPS board 2 2 3 7 VA 1 Check 3 7 VA at WL606 coil 2 If 3 7 VA is not checked at the point then find PVDD at pin7 of WIC607 3 1 2 is NG Replace WIC607 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 WL604 at WL604 PVDD PVDD at pin7 of WIC606 at pin7 of WIC606 3 7 VA 3 7 VA at WL606 at W...

Страница 53: ...5 3 Check 3 3 VA at pin7 8 of WIC603 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 WCA603 WL627 at WCA603 WL627 3 3 VA 3 3 VA at pin7 8 of WIC603 at pin7 8 of WIC603 3 3V_PWM 3 3V_PWM at pin5 of WIC605 at pin5 of WIC605 ...

Страница 54: ...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...

Страница 55: ...4 6 WAVEFORMS OF MAJOR CHECK POINT 1 VOLTAGE FIG 1 1 WIC607 3 7 VA 1 FIG 1 2 PWM 3 3 V 2 FIG 1 3 Wireless 3 3 VA 3 3 2 1 ...

Страница 56: ...4 7 2 AMP VOLTAGE FIG 2 1 Woofer PVDD PVDD 34 5 V 4 FIG 2 2 Woofer 12 V 5 4 4 5 ...

Страница 57: ...4 8 3 PWM FIG 3 1 Woofer PWM SW SIgnal 6 FIG 3 2 Woofer PWM SW SIgnal 7 7 6 ...

Страница 58: ...4 9 4 LED FIG 4 1 Pairing Off Status Red LED 8 FIG 4 2 Pairing On Status Yellow LED 9 9 8 ...

Страница 59: ...4 10 ...

Страница 60: ... Cable 10P WCN602 SMD 24P B to B Wireless module Wireless module PN901 DIP 2P Power Cord WOOFER SMPS PCB WOOFER AMP WCN601 DIP 10P WCN604 DIP 2P JK401 Harness Cable 2P WOOFER PAIRING KEY WCN605 DIP 3P LED CNT 4 12 4 11 WIRING DIAGRAM ...

Страница 61: ...WOOFER AMP PVDD WOOFER AMP SW LPF DC DC DC DC LDO PVDD PVDD PWM 3 3 Wireless 3 3 3 7 V LDO PWM PWM_SW PWM_SW 12 V SW LPF Flash 4 14 4 13 BLOCK DIAGRAM ...

Страница 62: ...WOOFER 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 CIR...

Страница 63: ...4 18 4 17 9 8 7 6 4 4 3 2 5 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 WF AMP EAX66304701 Rev1 2 10 2015 11 17 2 WOOFER AMP CIRCUIT DIAGRAM ...

Страница 64: ...4 20 4 19 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J WF KEY EAX66305401 Rev1 2 9 2015 11 17 3 WOOFER KEY CIRCUIT DIAGRAM ...

Страница 65: ...4 22 4 21 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 ...

Страница 66: ...4 24 4 23 2 WOOFER AMP P C BOARD 3 WOOFER KEY P C BOARD TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW ...

Страница 67: ...4 26 4 25 ...

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