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SERVICE MANUAL

CAUTION

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

Internal Use Only

Website http://biz.lgservice.com

Wireless Sound Bar

JANUARY, 2015

P/NO : AFN76932738

MODEL: LAS551H (LAS551H, S55A1-D)

MODEL: LAS551H

(LAS551H, S55A1-D)

Summary of Contents for LAS551H

Page 1: ...AUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Internal Use Only Website http biz lgservice com Wireless Sound Bar JANUARY 2015 P NO AFN76932738 MODEL LAS551H LAS551H S55A1 D MODEL LAS551H LAS551H S55A1 D ...

Page 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 ...

Page 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 ...

Page 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...

Page 5: ...ed LED on the main unit is blinking 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 again a...

Page 6: ...in set Volume Remote control SLEEP SETTING KEY VOL EXIT KEY Play Pause CLIP ALGORITHM EDIT Main set Volume Remote control VOL WIRELESS RF CHANNEL CHANGE Main set Volume Remote control INFO SOUND BYPASS Main set Volume Remote control DRC APD TIME DISPLAY Main set Volume Remote control AV SYNC UP REPEAT Up DOWN Stop Ok Down RIGHT F Skip Right LEFT B Skip Left ENTER Play Pause Enter DEMO MODE Main se...

Page 7: ...n It s possible to connect wireless subwoofer Ex 6 Press remote control key 1 time Check EQ version Ex 7 Press remote control key 1 time Check option Press remote control key Previous Next option Ex 8 Power cord unplug 2 EEPROM Initialize 1 Power on 2 Press main set volume key and remote control SOUND EFFECT during 3 seconds 3 Display VFD E2P CLR 4 Power off automatically 5 Power cord unplug MCS E...

Page 8: ... is E Wireless Rx E WIRELESS_RX_150303 bin if USB driver is E 2 Update 1 Power on 2 Change the USB function 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 USB or AC cord 6 After update finish show FINISH in VFD a...

Page 9: ... 1 HDMI OUT 19 Pin Type A HDMI connector x 1 Available Digital Input Audio Sampling Frequency 32 kHz 44 1 kHz 48 kHz 96 kHz USB Version 2 0 Bus Power Supply 5 V 500 mA AMPLIFIER Total 320 W Front Middle Tweeter 40 W x 2 4 Ω at 1 kHz 20 W x 2 8 Ω at 12 kHz Subwoofer 200 W 3 Ω at 80 Hz THD 10 WIRELESS SUBWOOFER S55A1 D Power requirements 120 V 60 Hz Power consumption 33 W Type 1 Way 1 Speaker Impeda...

Page 10: ...2 1 SECTION 2 CABINET MAIN CHASSIS CONTENTS DISASSEMBLY INSTRUCTIONS 2 2 EXPLODED VIEWS 2 5 1 MAIN SET SECTION 2 5 2 WIRELESS SUBWOOFER SECTION 2 7 3 PACKING ACCESSORY SECTION 2 9 ...

Page 11: ...ain set upside down 1 Case Bottom Assembly 1 Remove the 18 screws on the main set 2 Remove the Case Bottom Assembly 2 Deco Side 1 Remove the 4 screws securing the Deco Side 2 Remove the Deco Side left right Fig 2 Fig 1 1 1 2 3 Deco Side 2 1 Case Bottom Assembly ...

Page 12: ... 4 Bluetooth Module 1 Disconnect the FFC cable from the Bluetooth Module 2 Remove the Bluetooth Module 3 Check and Replace the Bluetooth Module 3 Grille 1 Remove the Grille Fig 4 Fig 3 1 2 Bluetooth Module ...

Page 13: ...Assembly 2 Remove the Cover Button Assembly Cover Button Holder Button 3 Remove the Tack Key Board 4 Disconnect the Harness cable from the Tack Key Board 5 Check and Replace the Tack Key Board Fig 5 1 2 3 4 Tack Key Board Cover Button Cover Button Assembly Holder Button ...

Page 14: ... FRONT HDMI JACK WIRELESS B T A55 260 261 KEY MAIN SMPS 457 A44B 257 258 258 257 464 464 464 255 263 SPK703 SPK704 263 464 464 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 ...

Page 15: ...4 955 956 956 A900W 300W A45W A54W A47W 952 CN901 953 A49W 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 16: ...803 Packing Main 806 Optical cable 801 Owner s manual 900 Remote control 804 Bag 802 Box 829 Cable tie 837 Cover foot 2 808 Batteries 2 835 Wall bracket 836 Screws 2 3 PACKING ACCESSORY SECTION ...

Page 17: ...2 10 ...

Page 18: ...ICAL 3 15 7 PORTABLE 3 16 8 AUDIO PWM 3 17 9 AUDIO AMP 3 19 WIRING DIAGRAM 3 21 BLOCK DIAGRAM 3 23 CIRCUIT DIAGRAMS 3 25 1 SMPS CIRCUIT DIAGRAM 3 25 2 MAIN DSP CIRCUIT DIAGRAM 3 27 3 MAIN PWM AMP CIRCUIT DIAGRAM 3 29 4 MAIN POWER CIRCUIT DIAGRAM 3 31 5 HDMI JACK CIRCUIT DIAGRAM 3 33 6 FRONT CIRCUIT DIAGRAM 3 35 7 TACT KEY CIRCUIT DIAGRAM 3 37 CIRCUIT VOLTAGE CHART 3 39 PRINTED CIRCUIT BOARD DIAGRA...

Page 19: ...s when you power on the unit 1 1 Solution Replace SMPS board 1 2 How to troubleshoot Countermeasure 1 Check the PVDD voltage 18 7 V at pin1 2 3 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 ...

Page 20: ...02 1 Check 5 1 VA at L606 2 If 5 1 VA is not checked at the point then find 18 7 V at pin7 of IC602 3 1 2 is NG Replace IC602 2 3 IC603 1 Check 12 VA at L604 2 If 12 VA is not checked at the point then find 18 7 V at pin7 of IC603 3 1 2 is NG Replace IC603 MAIN board top view MAIN board top view MAIN board top view L602 L602 L606 L606 L604 L604 IC601 pin7 IC601 pin7 IC602 pin7 IC602 pin7 IC603 pin...

Page 21: ...status of JK851 2 Please check L854 L855 PORT_L PORT_R signal of portable jack JK851 If you cannot find input signal replace JK851 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 HDMI JACK board top view MAIN board bottom view JK851 JK851 L854 L854 L855 L855 IC508 IC508 ...

Page 22: ...ur eyes at 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 bottom view IC505 IC505 L509 L509 CN50...

Page 23: ... 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 L509 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 ...

Page 24: ...e check USB voltage 5 V of JK853 pin1 and CA851 in HDMI JACK board 2 Please check USB data signal D D of IC502 to check TP588 TP589 at CN507 If you have not data signal please replace IC502 6 3 Service hint Any picture Remark MAIN board bottom view HDMI JACK board top view JK853 JK853 pin1 pin1 CA851 CA851 TP588 TP588 TP589 TP589 ...

Page 25: ... 1 Please check 3 3 V of 3 3VA at L853 in HDMI JACK board 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 7 3 Service hint Any picture Remark HDMI JACK board top view MAIN board top view L853 L853 IC507 IC507 R5R8 R5R8 ...

Page 26: ...nd 8 1 HDMI jack connection 1 Check the HDMI jack connection correctly each port JK801 HDMI IN JK800 HDMI OUT 8 2 IC803 1 Check 3 3 V at pin1 4 of IC803 and 1 08 V at L803 nearby pin8 of IC803 2 If 3 3 V is not output check 3 3 VA at pin1 of IC802 3 1 2 is OK Replace HDMI JACK board IC802 IC802 IC803 IC803 L803 L803 JK800 JK800 JK801 JK801 ...

Page 27: ...3 10 WAVEFORMS OF MAJOR CHECK POINT 1 CRYSTAL FIG 1 1 X501 24 MHz 1 FIG 1 2 X502 X701 24 576 MHz 2 FIG 1 3 X801 27 MHz 3 1 2 2 3 ...

Page 28: ...3 11 2 FLASH MEMORY FIG 2 VCC CS CLK DO 4 5 6 7 7 6 5 4 VCC CS CLK DO ...

Page 29: ...3 12 3 TACT KEY FIG 3 1 Press Power Key FIG 3 2 Press FUNC Key 1 1 13 V 0 72 0 82 V 8 9 FIG 3 3 Press VOL Key 0 424 0 485 V 10 FIG 3 4 Press VOL Key 0 V 11 9 11 8 10 ...

Page 30: ...3 13 4 USB FIG 4 1 USB_5V 12 FIG 4 2 USB D 13 FIG 4 3 USB D 14 12 14 13 ...

Page 31: ...NTROL FIG 5 1 Input Voltage 15 FIG 5 2 Low Timing 16 FIG 5 3 High Timing 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 17 16 17 15 ...

Page 32: ...3 15 6 OPTICAL FIG 6 1 OPT_IN 18 FIG 6 2 OPT_DET 19 19 18 ...

Page 33: ...3 16 7 PORTABLE FIG 7 1 ADC IC 5 V 20 FIG 7 2 ADC IC 3 3 V 21 FIG 7 3 Analog Input Voltage X XUY G 22 22 20 21 ...

Page 34: ...3 17 8 AUDIO PWM 1 2 FIG 8 1 PWM IC 3 3 V FIG 8 2 PWM IC 1 2 V 23 24 FIG 8 3 BCK 25 FIG 8 4 LRCK 26 24 25 26 23 ...

Page 35: ...3 18 AUDIO PWM 2 2 FIG 8 5 Tweeter L FIG 8 6 Front L 384 14 kHz TWL TWL 384 14 kHz FL FL 27 28 FIG 8 7 Tweeter R 384 17 kHz TWR TWR 29 FIG 8 8 Front R 384 17 kHz FR FR 30 28 30 27 29 ...

Page 36: ...3 19 9 AUDIO AMP FIG 9 1 AMP IC PVDD PVDD 18 7 V 31 FIG 9 2 PVDD GVDD AMP_PDN 1S 31 32 33 31 33 32 ...

Page 37: ...3 20 ...

Page 38: ...ireless Module Wireless module BT Module CN508 SMD 10P FFC MAIN BT CN504 SMD 4P Harness MAIN TACK KEY CN301 SMD 4P Harness TACK KEY MAIN SMD 12P B to B CN501 MAIN CN201 FRONT CN200 SMD 10P FPC MAIN LCD Module SMD 26P B to B CN507 MAIN CN801 HDMI JACK LCD Module PN900 DIP 2P Power Cord SMPS PCB MAIN PCB HDMI JACK PCB TACK KEY PCB FRONT PCB WIRING DIAGRAM ...

Page 39: ...C HDMI IN HDMI OUT USB D D RMC Flash 8 MB SPI EEPROM 2 KB I2C SDRAM 8 MB Dolby DTS PCM MPEG2 AAC LGE Pre PP Scaling 48dB dts 2 0 Downmix Subwf Summing 3Band SCV SFX Dynamic Loudness Audio Delay Offset Gain Controller LG Post PP 24bit Max Min Trunc LGPP_DOW NMIX_221 Scaling 36dB PCM1808 Portable IN Optical IN TX_LRCK TX_BCK ADC_LRCK MAIN_PWR_CTRL MCS_RST PWM SDA SCL BT_RST DIR_SDA SCL LCD_DO LRCK B...

Page 40: ...RVICING 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 O...

Page 41: ...28 3 27 22 20 21 2 19 18 9 11 8 10 7 6 5 4 1 14 13 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 EAX66222601 Rev1 7 24 MAIN 2 2014 11 26 2 MAIN DSP CIRCUIT DIAGRAM ...

Page 42: ...30 3 29 3 MAIN PWM AMP CIRCUIT DIAGRAM 2 24 25 26 23 28 30 27 29 31 33 32 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 EAX66222601 Rev1 7 24 MAIN 3 2014 11 26 ...

Page 43: ...3 32 3 31 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 EAX66222601 Rev1 7 19 MAIN 4 2014 11 26 4 MAIN POWER CIRCUIT DIAGRAM ...

Page 44: ...3 34 3 33 3 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 HDMI JACK EAX66225501 Rev1 7 24 2014 11 26 5 HDMI JACK CIRCUIT DIAGRAM ...

Page 45: ...3 36 3 35 16 17 15 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 EAX66226401 Rev1 7 19 2014 11 26 6 FRONT CIRCUIT DIAGRAM ...

Page 46: ...3 38 3 37 7 TACT KEY CIRCUIT DIAGRAM 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 TACK KEY EAX66226501 Rev1 7 24 2014 11 26 ...

Page 47: ...5 18 V 6 5 V 5 17 V IC701 IC Sound Audio Processor 33 42 52 66 3 3 V PWM 10 3 38 V IC702 IC Audio Amplifier 29 30 31 36 37 38 18 7 V PVDD 18 64 V 2 VDD 12 01 V 13 AVDD 8 02 V 1 22 GVDD 12 08 V IC703 29 30 31 36 37 38 18 7 V PVDD 18 64 V 2 VDD 12 27 V 13 AVDD 8 02 V 1 22 GVDD 12 08 V Designator Description Pin Voltage Spec Measured Voltage CONNECTORS CN501 Connector B to B 6 5 V 5 17 V 8 12 V 12 03...

Page 48: ...3 42 3 41 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 49: ...3 44 3 43 2 MAIN P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Page 50: ...3 46 3 45 3 HDMI JACK P C BOARD DIAGRAM 5 TACT KEY P C BOARD DIAGRAM 4 FRONT P C BOARD DIAGRAM TOP VIEW TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW BOTTOM VIEW ...

Page 51: ...3 48 3 47 ...

Page 52: ...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 ...

Page 53: ...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 ...

Page 54: ...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...

Page 55: ...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 ...

Page 56: ...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 57: ...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 ...

Page 58: ...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 ...

Page 59: ...4 8 3 PWM FIG 3 1 Woofer PWM SW SIgnal 6 FIG 3 2 Woofer PWM SW SIgnal 7 7 6 ...

Page 60: ...4 9 4 LED FIG 4 1 Pairing Off Status Red LED 8 FIG 4 2 Pairing On Status Yellow LED 9 9 8 ...

Page 61: ...4 10 ...

Page 62: ... 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 ...

Page 63: ...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 ...

Page 64: ...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...

Page 65: ...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 7 2014 11 26 2 WOOFER AMP CIRCUIT DIAGRAM ...

Page 66: ...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 6 2014 11 26 3 WOOFER KEY CIRCUIT DIAGRAM ...

Page 67: ...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 ...

Page 68: ...4 24 4 23 2 WOOFER AMP P C BOARD 3 WOOFER KEY P C BOARD TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW ...

Page 69: ...4 26 4 25 ...

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