LG SL7Y Service Manual
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LG SL7Y Service Manual

Wi-fi sound bar
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CONFIDENTIAL
Wi-Fi SOUND BAR
SERVICE MANUAL
MODEL: SL7Y
(SL7Y, SPL5B-W)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN78474485
FEBRUARY, 2019
Copyright © 2019 LG Electronics Inc. All rights reserved.
Only for training and service purposes.

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  • Page 1 Wi-Fi SOUND BAR SERVICE MANUAL MODEL: SL7Y (SL7Y, SPL5B-W) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN78474485 FEBRUARY, 2019 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 2 SECTION 1 ..GENERAL SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..WIRELESS SUBWOOFER PART SECTION 5 ..WIRELESS RECEIVER PART (OPTION) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 3: Table Of Contents

    WIRELESS SUBWOOFER CONNECTION ....................... 1-6 REAR SPEAKERS CONNECTION (SOLD SEPARATELY) ................1-7 HIDDEN KEY MODE ............................1-8 SOFTWARE UPDATE GUIDE ........................... 1-9 SPECIFICATIONS ............................1-12 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • 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

    Note 1: Accessible Conductive Parts include Metal panels, tricity sufficient to damage an ES device.) Input terminals, Earphone jacks,etc. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 6: Name Of Each Component

    - Connect the (TV ARC) HDMI OUT jack on the the unit to OPTICAL OUT jack on the TV. back of the unit to ARC jack on the TV. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 7: Wireless Subwoofer Connection

    Pairing.) 2. Turn on the sound bar. - Pairing is completed. The green LED on the rear of the wireless subwoofer turns on. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 8: Rear Speakers Connection (Sold Separately)

    + to + and – to –. If the cables are reversed, the sound will be distorted and will lack bass. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 9: Hidden Key Mode

    • ENTER : Press Mute key for 3 seconds when Woofer and Wireless Rear speaker is off. • RESULT : VFD displays ‘WL RESET’’ and initialize TX module. Paring will be disconnected. < MAIN Key > < Remocon > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 10: Software Update Guide

    DO NOT turn off during displaying ‘PLEASE WAIT’ on VFD. ※ Before update Woofer RX or Rear Rx WOOFER RX, Woofer and Rear Speaker have to be paired with Main soundbar Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 11 2. Using APP Before Network update, soundbar has to be connected with ‘LG Wifi Soundbar’ Application. Step 1. Select setting gui. Step 2. Select software version display. 1-10 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 12 Step 4. If there is new version on server, press Update. Step 7. After update fi nish, application Step 6. Updating show the result. 1-11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 13: Specifications

    Approx. 100.0 mm x 140.0 mm x 100.0 mm (3.9 inch x 5.5 inch x 3.9 inch) • Designs and specifications are subject to change without prior notice. 1-12 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 14 2. HOW TO DISASSEMBLE THE SUBWOOFER ..................2-5 EXPLODED VIEWS ............................2-9 1. MAIN UNIT SECTION ..........................2-9 2. WIRELESS SUBWOOFER SECTION ....................2-11 3. PACKING ACCESSORY SECTION ....................... 2-13 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 15: Disassembly Instructions

    1) Disconnect the 5 cables from The AMP PCB Assembly. 2) Remove the 3 Screws. Figure 1-2 (1) 3) Remove the 2 Screws from The JACK PCB Chassis. Figure 1-2 (2) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 16: How To Disassemble The Main Unit

    Figure 1-2-2 1-2-3. BT and WIRELESS Module 1) Disconnect the 2 cables from The BT and WIRELESS Module Assembly. 2) Remove the Screw. Figure 1-2-3 (1) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 17 4) Remove the Wi-Fi Module. Figure 1-2-4 1-2-5. Button PCB Assembly 1) Disconnect the 2 hooks. 2) Remove the cable. 3) Push the Button PCB Assembly. Figure 1-2-5 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 18 1) Remove the 8 screws. Figure 2-1 (1) 2) Pull out the Rear Panel Assembly and disconnect the SPK cable. Rear Panel Assembly SPK cable Figure 2-1 (2) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 19: How To Disassemble The Subwoofer

    2) Assemble the WIRELESS module into the wireless holder. 3) Attach the EVA sheet (0.15T) to the WIRELESS module. 4) Connect the FFC cable. Figure 2-2 (2) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 20 1) Disconnect the Power inlet socket cable. AMP+SMPS PCB Assembly Figure 2-3 (1) 2) Remove the 5 screws. 3) Remove the AMP+SMPS PCB Assembly. AMP+SMPS PCB Assembly Figure 2-3 (2) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 21 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 22: Exploded Views

    TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. CABLE7 WI-FI MAIN MPEG A80C CABLE1 A80L CABLE2 LCD701 CABLE5 CABLE6 CABLE3 CABLE4 WIRELESS WIRELESS 2-10 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 23: Wireless Subwoofer Section

    2. WIRELESS SUBWOOFER SECTION A900 A45W A54W 2-11 2-12 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 24: Packing Accessory Section

    Optional Part  806 Optical cable 900 Remote control 833 AC adapter 300 Power cord 835 Wall bracket 837 Holder, foot 836 Screws (2) 2-13 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 25 2-14 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 26 2. MPEG / JACK P. C. BOARD DIAGRAM ....................3-27 3. AMP P. C. BOARD DIAGRAM ......................3-29 4. KEY P. C. BOARD DIAGRAM ......................3-30 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 27: Wiring Diagram

    WIRING DIAGRAM Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 28: Block Diagrams

    BLOCK DIAGRAMS 1. SYSTEM BLOCK DIAGRAM Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 29: Power Block Diagram

    2. POWER BLOCK DIAGRAM Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 30: One Point Repair Guide

    (1%) 0OHM RA665 100K DGND DGND CA656 RA660 100nF VOUT = 0.792x(47K/3.3K+1)= 12.072V DGND DGND IC604 IC604 L601 L601 < AMP board top view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 31 T P 1 6 9 T P 1 7 0 R 1 3 0 R 1 3 1 R 1 3 2 < MAIN board top view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 32 R 1 5 2 R 1 5 3 R 1 0 3 R 1 4 7 R 1 4 8 R 1 0 2 < MAIN board top view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 33: Sound

    R 3 7 5 R 3 6 4 R 3 4 2 R 3 3 7 R 3 3 0 < MAIN board top view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 34 FB203 FB203 R207 R207 C 2 1 6 I C 3 0 9 < MPEG/JACK board top view > < MPEG/JACK board bottom view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 35 C 3 6 0 C 3 5 9 R 3 6 9 C 3 5 8 IC308 IC308 < MPEG/JACK board bottom view > 3-10 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 36 B S I Z E : 2 0 7 . 5 X 6 6 . 5 8 . 1 1 . 2 2 < MPEG/JACK board top view > 3-11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 37: Protection Error

    3-1-3. Service hint (Any picture / Remark) CN703 CN703 CN704 CN704 CN702 CN702 AR607, AR606, AR605 AR607, AR606, AR605 < AMP board top view > 3-12 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 38 2) If 12 V is OK, replace AMP board. 3-2-3. Service hint (Any picture / Remark) IC700 IC700 IC701 IC701 IC702 IC702 < AMP board bottom view > 3-13 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 39: Waveforms Of Major Check Point

    R159 4.7K 4.7K 4.7K 4.7K C116 100nF MSF_SPI_CS HOLD# MSF_MISO DGND SCLK MSF_CLK MSF_MOSI EQ 1st_Vendor DGND 8MBIT FIG 2. VCC, CS#, CLK, DO 3-14 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 40: Tact Key

    JTP1127WEM JTP1127WEM JTP1127WEM JTP1127WEM R151 100nF P6.0/A0 P6.1/A1 R152 //FOR TAS5612-/CLIP DC_DETECT P6.2/A2 POWER WIFI VOL+ VOL- FUNC. R153 P6.3/A3 AMP_CLIP0 POWER FUNC. DGND 3-15 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 41: Usb

    D201 EAG62571101 C216 uCLAMP0561P 220uF JK204 C214 TP244 FL203 R235 100nF TP245 USB D- USB2_DN MPEG TP246 R236 USB D+ USB2_DP TP247 DGND DGND 3-16 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 42: Remote Control

    “ 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 3-17 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 43: Optical

    FIG 6-1. OPT IN FIG 6-2. OPT DET OPTICAL JK201 EAG37842011 OPTICAL JACK,192KHz 3.3VA FB203 PZ1608U221-1R4TF R207 MPEG OPT_SPDIF R205 OPT_DET MICOM C266 100pF DGND DGND 3-18 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 44 C436 C438 100nF 10uF A_3V3 Close to pin TGND FB401 PZ1608U221-1R4TF D_3.3V Close to pin FB405 C439 10uF TGND TGND FIG 7-3. TUNER AUDIO 3-19 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 45 3-20 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 46: Circuit Voltage Chart

    AVDD -0.3 V ~ 8.5 V 7.7 V AVDD12 1.14 V ~ 1.26 V 1.21 V AVDD12_LDO 1.14 V ~ 1.26 V 1.17 3-21 3-22 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 47: Capacitor Voltage

    3.34 V 3.3 VA (3.0 V ~ 3.6 V) CN200 (MAIN <-> WiFi) WIFI_3.5V 3.53 V 3.50 V 3.5 VA (3.5 V±0.175 V) 3-23 3-24 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 48: Printed Circuit Board Diagrams

    R 2 A 7 C 2 4 5 I C 4 0 2 I C 2 0 2 L 4 0 7 (BOTTOM VIEW) 3-25 3-26 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 49: Mpeg / Jack P. C. Board Diagram

    2 0 1 8 . 1 1 . 2 2 (BOTTOM VIEW) C 5 D 1 C 5 6 0 C 5 5 9 C 5 B 3 3-27 3-28 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 50: Amp P. C. Board Diagram

    F R 4 - 4 L 1 . 6 T 2 0 1 8 . 1 1 . 2 2 P C B S I Z E : 4 3 X 3 0 (BOTTOM VIEW) (BOTTOM VIEW) 3-29 3-30 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 51 3-31 3-32 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 52 6. LED ............................... 4-11 CIRCUIT VOLTAGE CHART ........................... 4-13 PRINTED CIRCUIT BOARD DIAGRAMS ....................... 4-15 1. WOOFER SMPS & AMP P. C. BOARD ....................4-15 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 53: Wiring Diagram

    WIRING DIAGRAM 2P, 3.96mm ST, Non Lock SMD Wireless 26P, 0.5mm ST, Non Lock SMD 2P, 3.96mm ST, Non Lock , SMD Power Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 54: Block Diagram

    BLOCK DIAGRAM Wireless LED (RED, GREEN) Wireless AMP_PDN AMP_SD PAIRING Reset KEY SW+/SW- PWM IC AMP IC Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 55: One Point Repair Guide

    W C N 6 0 1 W C 6 0 8 W C 6 0 6 W C 6 0 7 < Woofer SMPS & AMP board top view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 56 W C 7 7 1 W C 7 7 5 W C 7 0 9 W R 7 2 6 < Woofer SMPS & AMP board bottom view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 57: Wireless Connection

    W R 7 6 2 W R 7 6 4 W C 7 6 2 W R 7 7 4 < Woofer SMPS & AMP board top view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 58: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. CRYSTAL FIG 1. WX601 (24.576 MHz) 2. FLASH MEMORY FIG 2. VCC, CS#, CLK, DO Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 59: Voltage

    3. VOLTAGE FIG 3-2. Woofer 12 VA FIG 3-1. Woofer PVDD FIG 3-3. Woofer 3.3 VA FIG 3-4. Woofer 3.3V_PWM Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 60: Amp Voltage

    4. AMP VOLTAGE FIG 4-2. AMP_12V FIG 4-1. AMP PVDD Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 61: Pwm

    5. PWM FIG 5-2. Woofer PWM SW- Signal FIG 5-1. Woofer PWM SW+ Signal 4-10 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 62: Led

    6. LED FIG 6-2. Pairing On Status  Green LED FIG 6-1. Pairing Off Status  Red LED 4-11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 63 4-12 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 64: Circuit Voltage Chart

    12.52 V 12.52 V 4.5 V ~ 17 V WIC705 DC,DC Converter VOUT: SW: #2 3.42 V 3.42 V 0.76 V ~ 7 V 4-13 4-14 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 65: Printed Circuit Board Diagrams

    W R 7 6 4 W C 7 6 2 W R 7 7 4 W C 7 0 9 W R 7 2 6 4-15 4-16 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 66 WAVEFORMS ..............................5-7 PRINTED CIRCUIT BOARD DIAGRAMS ......................5-9 1. WIRELESS RECEIVER SMPS P. C. BOARD ..................5-9 2. WIRELESS RECEIVER AMP P. C. BOARD ..................5-11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 67: Wiring Diagram

    WIRING DIAGRAM Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 68: Block Diagram

    BLOCK DIAGRAM Wireless LED (RED, GREEN) Wireless AMP_PDN AMP_SD PAIRING R R eset KEY RL+,-/RR+,- PWM IC Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 69: One Point Repair Guide

    Check 3.3 V. Replace AMP board. 2-3. Service hint (Any picture / Remark) RIC308 RIC308 RIC308 RIC307 RIC307 RIC307 < AMP board top view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 70 Check Module or connection. Replace AMP board. 3-3. Service hint (Any picture / Remark) RIC308 RIC308 RIC308 RIC307 RIC307 RIC307 < AMP board top view > Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 71: Electrical Troubleshooting Guide

    (RCN301 pin9, 10) no output. AMP 12 V (RIC308 pin4) Check RIC308. no output. 3.3 V (RIC307 pin3) Check RIC307. no output. Check Module or Connection. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 72: Waveforms

    WAVEFORMS 1. AUDIO PART (I2S) RCN303 pin1 : I2S LRCK RCN303 pin3 : I2S BCK RCN303 pin20 : I2S Audio Data Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 73 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 74: Printed Circuit Board Diagrams

    1. WIRELESS RECEIVER SMPS P. C. BOARD (TOP VIEW) (BOTTOM VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 5-10 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 75: Wireless Receiver Amp P. C. Board

    2. WIRELESS RECEIVER AMP P. C. BOARD (TOP VIEW) (BOTTOM VIEW) 5-11 5-12 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

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