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LG NP8340 Service Manual

Wireless multi-room smart hi-fi audio
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Download this manual See also: Owner's Manual
Internal Use Only
Website http://biz.lgservice.com
SMART Hi-Fi AUDIO
Wireless Multi-room
SERVICE MANUAL
MODEL: NP8340
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN77272340
JULY, 2015

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  • Page 1 Internal Use Only Website http://biz.lgservice.com SMART Hi-Fi AUDIO Wireless Multi-room SERVICE MANUAL MODEL: NP8340 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN77272340 JULY, 2015...
  • Page 2 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...

  • Page 3: Table Of Contents

    SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS ..........1-3 SERVICING PRECAUTIONS .......................... 1-4 • GENERAL SERVICING PRECAUTIONS • INSULATION CHECKING PRODEDURE • ELECTROSTATICALLY SENSITIVE (ES) DEVICES SOFTWARE UPDATE GUIDE ........................1-5 HIDDEN MODE ............................... 1-11 VERSION CHECK ............................1-12 SPECIFICATIONS ............................

  • 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

    SERVICING PRECAUTIONS CAUTION: Before servicing the Audio products covered by this Electrostatically Sensitive (ES) Devices service data and its supplements and addends, read and fol- Some semiconductor (solid state) devices can be damaged low the SAFETY PRECAUTIONS. easily by static electricity. Such components commonly are NOTE: if unforeseen circumstances create conflict between called Electrostatically Sensitive (ES) Devices.

  • Page 6: Software Update Guide

    SOFTWARE UPDATE GUIDE 1. Using MP tool 1) Open MP tool and select “Key DN”. 2) Check the section for download and open download fi le.

  • Page 7: Cable1

    3) Connect PC and SET by cross LAN cable. Setting PC - IP : 192.168.0.1 - Subnet mask : 255.255.255.0 - Gateway : 192.168.0.1 4) Set power on. 5) Connect LAN cable to Set and then Press “ADD” key within 3sec after connect the LAN. (Please connect the LAN when blinking WiFi-LED after booting) 6) Connect Status change “OK!”...
  • Page 8 7) Press “Update” button. 8) Download result display “OK!” if start download.
  • Page 9 9) You can identify update status by network indicator lamp. - B/E - <Updating : Blinking red LED> <Complete update : Blinking white LED> - Micom - <Updating : Blinking B/T, Wi-Fi LED > <Complete update : Reboot> - Option/ MEQ - <Updating : Blinking red LED>...
  • Page 10 2. Using APP 1) Connect set and music fl ow app. 2) Select “setup  update” menu then you can see below menu. 3) Enter “Check” button then display speaker list for update. download...
  • Page 11 4) Enter “download” button then start download to speaker. d o wn load Downloading… 5) Display below menu after done download then enter “Ready” button for updating. Read y Downloaded 1-10...

  • Page 12: Hidden Mode

    6) Display below menu after done update Updated 7) Set rebooting. (Booting previous version if failed update.) HIDDEN MODE  Reset Press “ADD” button for 8 seconds.  Micom reset Remote control “play” + “Wi-Fi SETUP” key. 1-11...

  • Page 13: Version Check

    VERSION CHECK 1) Version Check : Select “Factory Set1”. 2) Connect PC and SET by cross LAN cable. Setting PC - IP : 192.168.0.1 - Subnet mask : 255.255.255.0 - Gateway : 192.168.0.1 3) Set power on 4) Connect LAN cable to Set and then Press “ADD” key within 3sec after connect the LAN. (Please connect the LAN when blinking WiFi-LED after booting) 5) Display the version in the tool.

  • Page 14: Specifications

    SPECIFICATIONS • GENERAL Power requirements Refer to main label on the rear panel. Power consumption 14 W Networked standby : 5.4 W Dimensions (W x H x D) Approx. 125 mm x 175 mm x 115 mm without foot Net Weight (Approx.) 2.0 kg Operating temperature 5 °C to 35 °C...
  • Page 15 1-14...
  • Page 16 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ............................2-3 1. CABINET AND MAIN FRAME SECTION ....................2-3 2. PACKING ACCESSORY SECTION ......................2-5...

  • Page 18: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION CABLE1 CABLE4 CABLE3 WiFi CABLE5 TOUCH CABLE2 MAIN...

  • Page 19: Packing Accessory Section

    2. PACKING ACCESSORY SECTION 831 LAN cable 801 Owner’s manual 803 Packing 300 Power cord 804 Bag 803 Packing 802 Box...
  • Page 20 SECTION 3 ELECTRICAL CONTENTS ONE POINT REPAIR GUIDE ..........................3-2 1. NO POWER PROBLEM (19 VA) ......................3-2 2. IF NOT BOOTING WHEN YOU TURN ON THE SET (LED DOES NOT TURN ON) ......3-3 3. IF NOT BOOTING WHEN YOU TURN ON THE SET (IC802) ............... 3-4 4.

  • Page 21: One Point Repair Guide

    ONE POINT REPAIR GUIDE 1. NO POWER PROBLEM (19 VA) No power problem occurs when you power on the unit. 1-1-1. Solution Replace IC901/ IC902/ ZD901/ ZD903/ D901/ D902/ D933/ F901. 1-1-2. How to troubleshoot (Countermeasure) Case 1) 19 VA voltage abnormal: Check IC901/ IC902/ ZD901/ ZD903/ D901/ D902/ D933 and replace it. 1-1-3.

  • Page 22: If Not Booting When You Turn On The Set (Led Does Not Turn On)

    ONE POINT REPAIR GUIDE 2. IF NOT BOOTING WHEN YOU TURN ON THE SET (LED DOES NOT TURN ON). 2-1. IC805 (NO 5.2 VA) 2-1-1. Solution Replace IC805 on MAIN board. 2-1-2. How to troubleshoot (Countermeasure) 1) Please Check 19 VA of IC805 Pin2 (IN). 2) If 19 VA is abnormal, follow the stage 1-1 at the previous page.

  • Page 23: If Not Booting When You Turn On The Set (Ic802)

    ONE POINT REPAIR GUIDE 3. IF NOT BOOTING WHEN YOU TURN ON THE SET. 3-1. IC802 (NO 1.5 V / 1.2 V) 3-1-1. Solution Replace IC802 on MAIN board. 3-1-2. How to troubleshoot (Countermeasure) 1) Please Check 5.2 VA of L803 (VIN). 2) If 5.2 VA is abnormal, follow the stage 2-1 at the previous page.

  • Page 24: No Sound From The Speaker

    ONE POINT REPAIR GUIDE 4. NO SOUND FROM THE SPEAKER. 4-1. IC700, IC701 (NO 19 VA / 3.3 V) 4-1-1. Solution Replace IC700, IC701 on MAIN board. 4-1-2. How to troubleshoot (Countermeasure) 1) Please check 19 VA (PVDD) of C715, C735 and 3.3 V (DVDD) of L706. 2) If 19 VA is abnormal, follow the stage 1-1 at the previous page.

  • Page 25: If Not Booting When You Turn On The Set. And Led Doesn't Turn On

    ONE POINT REPAIR GUIDE 5. IF NOT BOOTING WHEN YOU TURN ON THE SET. AND LED DOESN’T TURN ON. 5-1. IC804 (NO 3.6 VA) 5-1-1. Solution Replace IC804 on MAIN board. 5-1-2. How to troubleshoot (Countermeasure) 1) Please check 5.2 VA of IC804 Pin3 (INPUT). 2) If 5.2 VA is abnormal, follow the stage 2-1 at the previous page.

  • Page 26: If Not Booting When You Turn On The Set (Ic800)

    ONE POINT REPAIR GUIDE 6. IF NOT BOOTING WHEN YOU TURN ON THE SET. 6-1. IC800 (NO 3.3 V) 6-1-1. Solution Replace IC800 on MAIN board. 6-1-2. How to troubleshoot (Countermeasure) 1) Please Check 19 VA of IC800 Pin2 (VIN) 2) If 19 VA is abnormal, follow the stage 1-1 at the previous page.

  • Page 27: If Not Booting When You Turn On The Set (Ic103)

    ONE POINT REPAIR GUIDE 7. IF NOT BOOTING WHEN YOU TURN ON THE SET. 7-1. IC103 (NO 3.3 VA) 7-1-1. Solution Replace IC103 on MAIN board. 7-1-2. How to troubleshoot (Countermeasure) 1) Check 3.3 VA of IC103 Pin48 (VIN). 2) If 3.3 VA is abnormal, follow the stage 5-1 at the previous page. 3) If 3.3 VA of IC103 Pin48 (VIN) is OK, check the EEP_CLK (Pin1), EEP_DAT (Pin2) signal.

  • Page 28: If Not Booting When You Turn On The Set (Mpeg Ic)

    ONE POINT REPAIR GUIDE 8. IF NOT BOOTING WHEN YOU TURN ON THE SET. 8-1. IC501 (MPEG IC) 8-1-1. Solution Replace IC501 on MAIN board. 8-1-2. How to troubleshoot (Countermeasure) 1) Check physical status of IC501on your eyes. 2) Check 1.2 V of L810, If 1.2 V is abnormal, follow the stage 3-1 at the previous page. 3) Check 1.5 V of L809, If 1.5 V is abnormal, follow the stage 3-1 at the previous page.

  • Page 29: If Not Booting When You Turn On The Set (Ddr Ic)

    ONE POINT REPAIR GUIDE 9. IF NOT BOOTING WHEN YOU TURN ON THE SET. 9-1. IC503, IC504 (DDR IC) 9-1-1. Solution Replace IC503, IC504 on MAIN board. 9-1-2. How to troubleshoot (Countermeasure) 1) Check 0.75 V of DDR3_VREF (Point 1). If voltage is abnormal follow the stage 3-1 at the previous page.

  • Page 30: If Not Booting When You Turn On The Set (Nand Flash Memory Ic)

    ONE POINT REPAIR GUIDE 10. IF NOT BOOTING WHEN YOU TURN ON THE SET. 10-1. IC505 (NAND Flash memory IC) 10-1-1. Solution Replace IC505 on MAIN board. 10-1-2. How to troubleshoot (Countermeasure) 1) Check 3.3 V of R512, R511, C5B1. 2) If 3.3 V is abnormal, follow the stage 6-1 at the previous page.

  • Page 31: If Not Booting When You Turn On The Set (Crystal)

    ONE POINT REPAIR GUIDE 11. IF NOT BOOTING WHEN YOU TURN ON THE SET. 11-1. X501 (Crystal) 11-1-1. Solution Replace X501 on MAIN board. 11-1-2. How to troubleshoot (Countermeasure) 1) Check the frequency of 27 MHz crystal (X501). 2) If 3.3 V is abnormal, follow the stage 6-1 at the previous page. 3) If the crystal doesn’t oscillate, replace X501.

  • Page 32: Wired Network Connection Error

    ONE POINT REPAIR GUIDE 12. WIRED NETWORK CONNECTION ERROR When you connect AP through the wired LAN, connection failed. 12-1. JK500 11-1-1. Solution Replace JK500 on MAIN board. 12-1-2. How to troubleshoot (Countermeasure) 1) If there is soldering problem, please re-soldering pin JK500. 2) If after re-soldering, problem still occurs, replace JK500.

  • Page 33: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER SUPPLY ON MAIN BOARD No 19 VA Replace F901 (same fuse). Is the F901 OK? Is IC901/ IC902/ ZD901/ ZD903/ Replace weird one. D901/ D902/ D933 OK? Check Inlet Socket and replace it. No 5.2 VA Is the Vcc of IC805 19 VA? Check the 19 VA.
  • Page 34 ELECTRICAL TROUBLESHOOTING GUIDE POWER SUPPLY ON MAIN BOARD No 1.2 V Is the Vin 5.2 VA Check the IC805. supplied to IC802, L803? Replace the weird one. Around the IC802 parts OK ? (RLC) Replace the IC802. No 1.5 V Is the Vin 5.2 VA Check the IC805.
  • Page 35 ELECTRICAL TROUBLESHOOTING GUIDE POWER SUPPLY ON MAIN BOARD No 3.6 VA Is the Vin 5.2 VA Check the IC805. supplied to IC804, L807? Replace the weird one. Around the IC804 parts OK? (RLC) Replace the IC804. No 3.3 V Is the Vin 19 VA Check the 19 V.

  • Page 36: Micom

    ELECTRICAL TROUBLESHOOTING GUIDE 2. MICOM MICOM Is the DC_V of IC103 Pin48 3.3 VA? Check power circuit troubleshooting. Replace R129, R164. Is the DC_V of IC103 Pin40 3.3 V? Check R129, R164. Check power circuit troubleshooting. 3-17...

  • Page 37: Led

    ELECTRICAL TROUBLESHOOTING GUIDE 3. LED LED doesn’t blinking Cable connection is OK? Connect the cable correctly or replace it. (CN101, CN300, CN301, CN400) Check power circuit troubleshooting. 3.6 V load on L301? Check the IC300 Replace IC300. Pin17, 18, 19, 20 signal. Replace LD401, LD402.
  • Page 38 ELECTRICAL TROUBLESHOOTING GUIDE 4-1. AUDIO (Wi-Fi MODE) Is the Vcc of IC700, IC701 Check power circuit troubleshooting. 19 V?(Pin2) Is the Vdd of IC700, IC701 Check power circuit troubleshooting. Pin27, 3.3 V? Check mode (Wi-Fi, B/T) Check AMP I2S signal Replace IC700.

  • Page 39: Audio

    ELECTRICAL TROUBLESHOOTING GUIDE 4-2. AUDIO (BLUETOOTH MODE) Check mode (Wi-Fi, B/T) Check 3.3 V Check power circuit troubleshooting. (CN501 Pin10). Check UART signal Check the B/T module, replace it. (CN500 Pin4, 6, 7, 8). 3-20...

  • Page 40: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. MICOM MICOM to MPEG IC103 PIN 34, 35 2. AMP MICOM to AMP I2S IC700 PIN 20, 21, 23 3-21...

  • Page 41: Mpeg

    3. MPEG IC501 MT8506 XTAL 27 MHz IC501 MT8506 WE# IC501 MT8506 CLK 3-22...
  • Page 42 MPEG IC501 MT8506 CAS# IC501 MT8506 BA0 3-23...

  • Page 43: Bluetooth

    4. BLUETOOTH 11 12 BT_TX, BT_RX, BT_RT 5. Wi-Fi Wi-Fi_N, Wi-Fi_P 3-24...

  • Page 44: Wiring Diagram

    WIRING DIAGRAM 4P, 1.25 mm, ST TOUCH Harness, SMD MPEG DEBUG (6630V90078D) 4P, 1.0 mm 6P, 1.25 mm, ST MICOM DEBUG ST, SMD Harness, SMD (6630R-FB02D) 6P, 1.00 mm, ST (6602T12004E) FFC, SMD (6630XE00106) 4P, 2.0 mm, ST 6P, 1.00 mm, AG 10P, 1.0 mm, AG Harness, SMD FFC, SMD...

  • Page 45: Block Diagrams

    BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM +1.2 V +19 VA Dual +5.2 VA +1.5 V +3.6 VA DC-DC SMPS TPS65252 AZ1117 +3.3 V_W +5.2 VA DCDC MP2315GJ +3.3 V 27 MHz +3.3 V +1.5 V DCDC +1.2 V MP2315GJ +3.3 V +19 VA +3.3 VA I2S(MCLK/BCK/LRCK/DATA)

  • Page 46: Power Block Diagram

    2. POWER BLOCK DIAGRAM 19 VA 1/ 8 W, 4 ohm, AMP Efficiency : 85 % 1100 mA 1100 mA T AS5766M X 2 3.3 V 60 mA 3.3 V 60 mA NA ND FLASH PCTRL0 19 VA 154 mA 3.3 V 518 mA 420 mA...

  • Page 47: Circuit Diagrams

    BE MODIFIED OR ALTERED WITH OUT PERMISSION WAY, IMPLEMENTATION OF THE LATEST SAFETY during Play mode. FROM THE LG CORPORATION. ALL COMPONENTS AND PERFORMANCE IMPROVEMENT CHANGES SHOULD BE REPLACED ONLY WITH TYPES INTO THE SET IS NOT DELAYED UNTIL THE NEW IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.

  • Page 48: Main - Micom/ Amp Circuit Diagram

    2. MAIN - MICOM/ AMP CIRCUIT DIAGRAM MICOM/ AMP : WAVEFORM NUMBER EAX66190203_Rev1.0(0)_MAIN_SD2 2015. 07. 02 3-33 3-34...

  • Page 49: Main - Mpeg Circuit Diagram

    3. MAIN - MPEG CIRCUIT DIAGRAM 11 12 MPEG : WAVEFORM NUMBER EAX66190203_Rev1.0(0)_MAIN_SD3 2015. 07. 02 3-35 3-36...

  • Page 50: Main - Memory & Hw Trap Circuit Diagram

    4. MAIN - MEMORY & HW TRAP CIRCUIT DIAGRAM MEMORY & HW TRAP EAX66190203_Rev1.0(0)_MAIN_SD4 2015. 07. 02 3-37 3-38...

  • Page 51: Volume Touch & Key1 Circuit Diagram

    5. VOLUME TOUCH & KEY1 CIRCUIT DIAGRAM VOLUME TOUCH & KEY1 EAX66190303_Rev1.0(0)_VOLUME_SD 2015. 07. 02 3-39 3-40...

  • Page 52: Led Circuit Diagram

    6. LED CIRCUIT DIAGRAM EAX66231303_Rev1.0(0)_LED_SD 2015. 07. 02 3-41 3-42...

  • Page 53: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART 1. ICs IC Sym Vcc/Vdd • Spec : 1.8 to 5.5 V IC100 • Measured Voltage : EEPROM Vdd : 3.33 • Spec : −0.5 to +6.5 V IC103 • Measured Voltage : Micom Vdd : 3.33 IC300 •...

  • Page 54: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-45 3-46...

  • Page 55: Touch P.c.board

    2. TOUCH P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3. LED P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-47 3-48...

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