LG NP8350 Service Manual
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LG NP8350 Service Manual

Smart hi-fi audio
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See also: Owner's Manual , Instruction Manual
Internal Use Only
Website http://biz.lgservice.com
SMART Hi-Fi AUDIO
SERVICE MANUAL
MODEL: NP8350
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN77272348
JULY, 2015

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  • Page 1 Internal Use Only Website http://biz.lgservice.com SMART Hi-Fi AUDIO SERVICE MANUAL MODEL: NP8350 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN77272348 JULY, 2015...
  • Page 2 CONTENTS SECTION 1 ..GENERAL SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...
  • Page 3 SECTION 1 GENERAL CONTENTS ESD PRECAUTIONS ............................1-3 HIDDEN KEY LIST ............................1-4 PROGRAM UPDATE GUIDE ..........................1-5 SPECIFICATIONS ............................1-11...

  • Page 4: Esd Precautions

    ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

  • Page 5: Hidden Key List

    HIDDEN KEY LIST Hidden Key Description Demo Wake Up “Function” + “Power” key for 7 seconds Factory Reset “Add” key for 10 seconds Wi-Fi Disable (Wi-Fi Power Off) “Wi-Fi setup” key for 5 seconds Wi-Fi Reset “Add” key for 3 seconds...

  • Page 6: Program Update Guide

    Media server software allows you to access audio fi les stored in media server (PC, Mac or Network storage) and enjoy them on your speaker via home networking. On www.lg.com website, type model name in the search bar and fi nd media server software on support tab.
  • Page 7 2. PROGRAM UPDATE BY “Music Flow Player” APP (BE / MICOM / MEQ is only possible) Install and run “Music Flow Player” app with next steps. Step 1. Connect speaker Step 2. Select “settings” Step 3. Select “Version info.” Step 4. Select “Device version info.”...
  • Page 8 Step 5. Check “Need to update” Step 6. System version check Step 7. Select update button Step 8. Download from CDN Server...
  • Page 9 Step 9. FW fl ash writing Step 10. Update is completed CAUTION: Do not power off NP8350 (Music Flow) until update is complete. When the update is completed, the device reboots automatically.
  • Page 10 3. PROGRAM UPDATE BY USB THROUGH MICRO USB JACK (using OTG Cable) 1) See the back side of NP8350 (Music Flow). Remove foot rubber. 2) Connect OTG cable to micro USB. 3) OTG Cable : Commercially available OTG cable to easily on the market can buy.
  • Page 11 6) How to update BE program  Copy fi rmware fi le to USB stick.  Insert USB stick to USB port of the NP8350 by USB JIG. (OTG)  You can see rotation of all LED in updating.  If updating is fi nished, all LED blink and off.

  • Page 12: Specifications

    SPECIFICATIONS Power supply 12 V 1.0 A (AC Adapter) Built-in rechargeable battery Power consumption 12 W Networked standby : 3.7 W (If all network ports are activated.) AC Adapter Model: WA-12M12FG Manufacturer: Yang Ming Industrial Input: AC 100 - 240 V, 50/60 Hz Output: 12 V 1.0 A Dimensions (W x H x D)
  • Page 13 1-12...

  • Page 14: Table Of Contents

    SECTION 2 CABINET & MAIN CHASSIS CONTENTS DISASSEMBLY INSTRUCTIONS ........................2-2 1. HOW TO DISASSEMBLE THE GRILLE ....................2-2 2. HOW TO DISASSEMBLE THE FRONT COVER ..................2-4 3. HOW TO REPLACE THE BATTERY ......................2-6 ASSEMBLY INSTRUCTIONS ......................... 2-10 1.

  • Page 15: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. HOW TO DISASSEMBLE THE GRILLE 1) Set is placed on top of soft sheet so as not to damage. 2) Use a thin fl at tool (ex. A fl athead screwdriver, recommended size : within width 2.5 mm), the Left end of the set to lift grille into the grille hole.
  • Page 16 4) Remove grille in the opposite direction after holding grille. CAUTION : Careful you don’t cut when to remove the grill. Figure 1-3...

  • Page 17: How To Disassemble The

    2. HOW TO DISASSEMBLE THE FRONT COVER 1) Remove the front screw 10 EA using a philips screwdriver. Figure 2-1 2) After remove rubber foot on the bottom, remove screw of the four edges of bottom screw using a philips screwdriver.

  • Page 18: Figure

    3) Push inside to the battery hole and remove cover front. Figure 2-3 4) Remove double - sided Tape attached at cover front. Figure 2-4...

  • Page 19: How To Replace The Battery

    3. HOW TO REPLACE THE BATTERY 1) After remove foot on the bottom, remove screw of bottom screw using a phillips screwdriver. Figure 3-1 2) Remove the Battery Assembly to release the hook using the (-) driver. Figure 3-2...
  • Page 20 3) Prepare new Battery Assembly. Figure 3-3 4) Make the wire straight and mount the wire on the wafer to use (-) driver. Figure 3-4...
  • Page 21 5) Push the jack of the wire to hooking using (-) driver. Figure 3-5 6) Check the wire arrangement between the passive radiator and battery supporter silk print on the PCB. Figure 3-6...
  • Page 22 7) Close the Battery Assembly, fi x the screw and assemble the rubber foot. Figure 3-7...

  • Page 23: Assembly Instructions

    ASSEMBLY INSTRUCTIONS 1. HOW TO ASSEMBLE THE GRILLE 1) Set is placed on top of soft sheet so as not to damage. CAUTION : Before assemble grille, remove double-sided Tape attached at cover front surely. Figure 4-1 2) Remove release paper of double - sided Tape at grille. Figure 4-2 2-10...
  • Page 24 3) Bend the position of 1.0~1.5 mm from outskirt line the of grille rib (refer to guide line) inwards 0.5~1.0 mm as in fi gure. Figure 4-3 4) Bend both short ribs as in fi gure 4-4. Guide Line Figure 4-4 2-11...
  • Page 25 5) Before assemble grille, check the cover jack rib and cover front right rib. If it is damage, bend grill rib refer to the fi gure 4-5. Figure 4-5 6) When viewed from the front of set, match the Right of cover main and hole rib of grille, and push lightly. when viewed from the rear of set, match hole rib of grille toward side button, and push lightly.
  • Page 26 7) Prepare tool of strengthen material and soft sheet. SOFT SHEET 1 SOFT SHEET 1 SOFT SOFT SHEET 2 SHEET 2 FLAT TOOL Figure 4-7 8) Before you press the set, tool is placed on top of soft sheet above of grille. Figure 4-8 2-13...
  • Page 27 9) Press using weight at outskirts of grille. (Red Line) Figure 4-9 10) Procedure : Left, Right of set ① (White Line)  front of set ② (Red Line) fi nally press Left, Right of set ① (White Line) one more. Figure 4-10 2-14...

  • Page 28: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN CHASSIS 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. WLAN CABLE1 CABLE3 265B Wi-Fi antenna 265A CABLE4 CABLE5 MAIN Please refer to Disassembly Instructions Guide...

  • Page 29: Packing Accessory Section

    2. PACKING ACCESSORY SECTION 801 Owner’s manual 826 Filter, Ferrite core 833 AC adapter 803 Packing 804 Bag 803 Packing 802A Accessory box 802C 802B Inner box...
  • Page 30 SECTION 3 ELECTRICAL CONTENTS ONE POINT REPAIR GUIDE ..........................3-2 1. NO POWER PROBLEM ......................... 3-2 2. NO SOUND IN PORTABLE MODE ......................3-3 3. NO SOUND IN BLUETOOTH MODE ..................... 3-4 4. NO SOUND IN Wi-Fi MODE ........................3-5 5.

  • Page 31: One Point Repair Guide

    ONE POINT REPAIR GUIDE 1. NO POWER PROBLEM No power problem occurs when you power on the unit. 1-1. Solution Check and replace IC901 on main board. 1-2. How to troubleshoot (Countermeasure) 1) Check 3.4 VA (C916).   C916 is not 3.4 VA, replace IC901. 2) Check X501 (Crystal).

  • Page 32: No Sound In Portable Mode

    ONE POINT REPAIR GUIDE 2. NO SOUND IN PORTABLE MODE No sound problem occurs in portable mode. 2-1. Solution Check and replace IC801 on main board. 2-2. How to troubleshoot (Countermeasure) 1) Check solder of JK401. 2) Check input voltage of IC801 (L801, L802). ...

  • Page 33: No Sound In Bluetooth Mode

    ONE POINT REPAIR GUIDE 3. NO SOUND IN BLUETOOTH MODE No power problem occurs when you power on the unit. 3-1. Solution Check and replace CN502 on main board. 3-2. How to troubleshoot (Countermeasure) 1) Check if Bluetooth module is in pairing state with your device. 2) Check connection of CN502 and Bluetooth module.

  • Page 34: No Sound In Wi-Fi Mode

    ONE POINT REPAIR GUIDE 4. NO SOUND IN Wi-Fi MODE No power problem occurs when you power on the unit. 4-1. Solution Check and replace CN501 on main board. 4-2. How to troubleshoot (Countermeasure) 1) Check if Wi-Fi is in connect state with your device. 2) Check connection of CN501 and Wi-Fi module.

  • Page 35: No Charging Battery

    ONE POINT REPAIR GUIDE 5. NO CHARGING BATTERY Battery is not charged. 5-1. Solution Check and replace IC902 on main board. 5-2. How to troubleshoot (Countermeasure) 1) Check both end Voltage of R931. (It should be 22 ~ 25 mV) 2) Check pin2, 3 of IC902.

  • Page 36: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER SUPPLY ON MAIN BOARD No 1.2 V Is the Check the IC903. Vin 13 V supplied to IC905 L900? Around the IC905 parts Replace the weird one. OK? (RLC) Replace the IC905. No 1.5 V Is the Check the IC903.
  • Page 37 ELECTRICAL TROUBLESHOOTING GUIDE No 3.4 VA Is the Check the IC903. Vin 13 V supplied to IC901 L906? Around the IC901 parts Replace the weird one. OK? (RLC) Replace the IC901. No 3.3 V Is the Vin 3.4 VA Check the IC901. supplied to IC900? Around the IC900 parts Replace the weird one.

  • Page 38: Micom

    ELECTRICAL TROUBLESHOOTING GUIDE 2. MICOM MICOM Is the DC_V of IC103 Check power. pin48 3.4 VA? Replace R130, R133. Is the DC_V of IC103 Check R130, R133 pin40 3.3 V? Check power. 3. LED Cable connection is OK? Replace cable. (CN103, CN300) Check power.

  • Page 39: Audio (Bluetooth Mode)

    ELECTRICAL TROUBLESHOOTING GUIDE 4. AUDIO (BLUETOOTH MODE) Is the VCC of Check power. IC700 pin2 13 V? Is the Vdd of Check power. IC700, IC801 3.3 V? Check mode (Bluetooth) Check 3.4 V. Check power. (CN502 pin10) Check UART signal. Replace Bluetooth module.

  • Page 40: Waveforms Of Major Check Point

    WAVEFORMS OF MAJOR CHECK POINT 1. MICOM 2. AMP LRCLK MICOM_UART_RX MICOM_UART_TX SCLK Figure 1. MICOM to MPEG Figure 2. MICOM to AMP I2S 3 4 5 3-11...

  • Page 41: Mpeg

    3. MPEG (1/2) Figure 3-1. IC501 MT8507 X-TAL 27 MHz Figure 3-2. IC501 MT8507 WE# Figure 3-3. IC501 MT8507 CLK 3-12...
  • Page 42 MPEG (2/2) Figure 3-4. IC501 MT8507 CAS# Figure 3-5. IC501 MT8507 BA0 3-13...

  • Page 43: Bluetooth

    4. BLUETOOTH 5. Wi-Fi BT_TX WIFI_N BT_RX BT_RST WIFI_P Figure 5. 14) WIFI_N Figure 4. Bluetooth signal 15) WIFI_P 14 15 11 12 13 3-14...

  • Page 44: Wiring Diagram

    WIRING DIAGRAM KEY / LED MCS (ROM) 12P, 0.5 mm AG, SMD Locking SPK L SPK R Battery Wi-Fi 6 P, 1.25 mm 12P, 0.5 mm 4 P, 1.25 mm 10 P, 1 mm AG, SMD AG, SMD Locking AG, Locking, SMD AG, SMD, Locking 5 P, 2.00 mm ST, Locking, SMD...

  • Page 45: Block Diagram

    BLOCK DIAGRAM SYS_PWR SYS_PWR +3.4 VA +5 V SYS_PWR DC-DC TPS563200 LM37102 Battery +13 V Charger +13 V 7.4 V 2600 mA BQ24133 SYS_PWR +1.2 V UF3D +3.3 V COIL VREF +3.4 VA +3.4VA Dual 3.3 µH +1.5 V S / W DC-DC BAT_TH BD2242...

  • Page 46: Circuit Diagrams

    CIRCUIT DIAGRAMS 1. MAIN - POWER/CHARGER CIRCUIT DIAGRAM POWER/CHARGER EAX66235101 Rev1.6(18) MAIN(#1) 2015.02.04 3-19 3-20...

  • Page 47: Main - Micom/Amp Circuit Diagram

    2. MAIN - MICOM/AMP CIRCUIT DIAGRAM 3 4 5 MICOM/AMP : WAVEFORM NUMBER EAX66235101 Rev1.6(18) MAIN(#2) 2015.02.04 3-21 3-22...

  • Page 48: Main - Mpeg Circuit Diagram

    3. MAIN - MPEG CIRCUIT DIAGRAM 14 15 12 13 : WAVEFORM NUMBER MPEG EAX66235101 Rev1.6(18) MAIN(#3) 2015.02.04 3-23 3-24...

  • Page 49: I/O Circuit Diagram

    4. I/O CIRCUIT DIAGRAM EAX66177601 Rev1.6(18) 2015.02.04 3-25 3-26...

  • Page 50: Key Circuit Diagram

    5. KEY CIRCUIT DIAGRAM EAX66193101 Rev1.6(18) 2015.02.04 3-27 3-28...

  • Page 51: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART IC Sym IC Name / Type Input Voltage W25Q80DVSSIG • Spec : 2.7 to 3.6 V IC100 Type : 8-pin SOIC • Measure : Serial Flash Vender : WINBOND Vcc : 3.4 Vcc : pin8 R5F100GEAFB#30 • Spec : 2.7 V ~ 3.6 V IC103 Type : 48-pin LQFP •...

  • Page 52: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 3-31 3-32...

  • Page 53: I/O P. C. Board Diagram

    2. I/O P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 3. KEY P. C. BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 3-33 3-34...

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