LG 47LX9500 Service Manual
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LG 47LX9500 Service Manual

47" class full hd 1080p
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1080P
47LX9500
47LX9500
Direct View LCD
LED Backlights
Training
LCD-DV Troubleshooting
47" Class Full HD 1080P
LCD TV (47" diagonally)
Published September 10
, 2010
th

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Summary of Contents for LG 47LX9500

  • Page 1 1080P 47LX9500 47LX9500 Direct View LCD LED Backlights Training LCD-DV Troubleshooting 47" Class Full HD 1080P LCD TV (47" diagonally) Published September 10 , 2010...
  • Page 2 Troubleshooting Section: Board Operation Troubleshooting of : • Switch Mode Power Supply Inverter Boards Main and Secondary (LED Backlight Drivers) • • Main Board T-CON/3D Board • Ft Control Board • • Soft Touch Keys Speakers • September LCD TV 47LX9500...
  • Page 3 Overview of Topics to be Discussed Overview of Topics to be Discussed 47LX9500 LCD Direct View Display Section 1 This Section will cover Contact Information and remind the Technician of Important Safety Precautions for the Customers Safety as well as the Technician and the Equipment.

  • Page 4: Preliminary Matters (The Fine Print)

    When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury.

  • Page 5: Esd Notice

    Increase the separation between the equipment and the receiver; Connect the equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the dealer or an experienced radio/TV technician for help. September LCD TV 47LX9500...

  • Page 6: Contact Information

    New Training Materials on Plasma Control Board ROM Update (Jig required) the Learning Academy site the Learning Academy site Published September 2010 by LG Technical Support and Training LG Electronics Alabama, Inc. 201 James Record Road, Huntsville, AL, 35813. September LCD TV 47LX9500...
  • Page 7 1. Check the appearance of the Replacement Panel and Circuit Boards for both physical damage and part number accuracy. 2. Check the model label. Verify model names and board model matches. 3. Check details of defective condition and history. Example: Oscillator failure dead set, etc… September LCD TV 47LX9500...

  • Page 8: Basic Troubleshooting Steps

    The final step is to correct the problem. Be careful of ESD and make sure to check the DC Supplies for proper levels. Make all necessary adjustments and lastly always perform a Safety AC Leakage Test before returning the product back to the Customer. September LCD TV 47LX9500...
  • Page 9 47LX9500 PRODUCT INFORMATION SECTION 47LX9500 PRODUCT INFORMATION SECTION This section of the manual will discuss the specifications of the 47LX9500 LCD Direct View Display September LCD TV 47LX9500...
  • Page 10 2. Wired Remote cable between the TV and Dongle for Control Functions. Media Box Wired Remote to control the Media Box TV A/V Inputs Wireless Receiver/Transmitter “Dongle” Attaches via Velcro to the back of the set HDMI September LCD TV 47LX9500...
  • Page 11 Wireless LAN (DLNA Adaptor) Wireless LAN (Sold Separately) Using the LG Wireless LAN for Broadband/1DLNA Adaptor, which is sold separately, allows the TV to connect to a wireless LAN network. The DLNA adaptor attaches to the Television via either of...

  • Page 12: Basic Specifications

    • 4 HDMI™ V.1.4 Inputs • 10M:1 Dynamic Contrast Ratio • Seamless Design • SIMPLINK™ Connectivity • Picture Wizard II • Dolby® Digital 5.1 Decoder (Easy Picture Calibration) • Infinite Sound • Smart Energy Saving • Magic Motion Remote Control September LCD TV 47LX9500...
  • Page 13 Logo Familiarization Page 1 of 4 Logo Familiarization Page 1 of 4 New definition television. LG’s INFINIA TVs are redefining home entertainment. Even beyond their jaw-dropping design, they offer access to virtually unlimited entertainment through broadband connectivity and freedom with wireless HD capability.
  • Page 14 Enjoy twice the picture quality of standard HDTV with almost double the pixel resolution. See sharper details like never before. Just imagine a Blu-ray disc or video game seen on your new LG Full HD 1080p TV. HDMI (1.3 Deep Color) Digital multi-connectivity HDMI (1.3 Deep color) provides a wider bandwidth (340MHz,...
  • Page 15 Draws less than 1 Watt in stand by. TruMotion 480Hz the world’s first “TruMotion 480Hz” panel, a combination of LG’s existing 240Hz technology with a new “scanning backlight” capable of being rapidly switched on and off.
  • Page 16 It's a sleek, elegant, virtually border-free design that will appeal to even the most refined sense of style. Magic Motion Remote Control With the wave of your hand, operate the onscreen menus using the Magic Motion Remote. September LCD TV 47LX9500...
  • Page 17 47LX9500 Remote Controls 47LX9500 Remote Controls Magic Motion Remote AKB73035402 Top Half Bottom Half Remote AKB72914018 September LCD TV 47LX9500...

  • Page 18: Accessing The Service Menu

    105-201M or p/n MKJ39170828 2) Press “In-Start” 3) A Password screen appears. 4) Enter the Password. Note: A Password is required to enter the Service Menu. Enter; 0000 Note: If 0000 does not work use 0413. MKJ39170828 105-201M September LCD TV 47LX9500...
  • Page 19 USB1 or USB2 for Software Upgrades, Wireless Dungle, Music and Photos Rear In/Out Jacks USB 2 USB 1 Component or Composite Video/Audio 3 Head Wireless Media Box Phones Remote Jack MAIN BOARD Rear and Side Input/Output locations HDMI 4 September LCD TV 47LX9500...
  • Page 20 Simple Manual Bring up the Customer’s Menu then Press the Red button on Remote Scroll down to item 9 Network Connections With Software Update Highlighted, Press Select on Remote Continue on next page September LCD TV 47LX9500...
  • Page 21 Service call number, Model name, SW version and serial No. is displayed. Note: Confirm the “Suffix” of the model number. If the Main board is replaced, the Model and Serial number must be reinserted into memory. See Model Number D/L. September LCD TV 47LX9500...
  • Page 22 Do not remove AC power or the USB Flash Drive. restarted. Do not turn off Power, during the upgrade 8) When download is completed, you will see process. “COMPLETE”. Software Files are now available from 9) Your TV will be restarted automatically. LGTechassist.com September LCD TV 47LX9500...
  • Page 23 Manual “Forced” Download Menu. Any file can be downloaded when selected and may cause the Main board to become inoperative if the incorrect file Example of files found was selected. On the Jump Drive September LCD TV 47LX9500...
  • Page 24 Use the cursor right or left to select the area to change. Use the cursor up or down to change. Cursor right until there is no text cursor blinking. Scroll down to highlight “Serial Number” and change. September LCD TV 47LX9500...
  • Page 25 Service Menu: Downloading EDID Data Pg 1 of 2 Service Menu: Downloading EDID Data Pg 1 of 2 1) Press “ADJ” key. 2) Select menu, Either “PCM EDID D/L” or AC3 EDID D/L September LCD TV 47LX9500...
  • Page 26 Note: When PCM is downloaded, AC3 will be N/G and when AC3 is downloaded PCM will be N/G. This means that when PCM is OK, PCM audio is priority and when AC3 is OK, AC3 audio is priority. September LCD TV 47LX9500...
  • Page 27 12.3/4" 27.11/16" 323.85mm 703.58mm Model No. Serial No. 8.16” Label 207.36mm Remove 4 screws to remove stand for wall mount 2.3/16" (55.88mm) 19.11/16" 500mm 10.13/16" Weight w/o Stand 51 lbs Weight with Stand 61.1 lbs 274.32mm September 2010 47LX9500 LCD-DV...
  • Page 28 3D SECTION 3D SECTION This section of the manual will discuss the 47LX9500 LCD Direct View Television ability to play 3D material. Upon completion of this section the Technician will have a better understanding of the how 3D works. September LCD TV 47LX9500...
  • Page 29 LG 3D Emitter & Glasses LG 3D Emitter & Glasses Convenient Emitter built-in to TV IR Sync • Wider viewing angle • Longer Viewing distance • Longer battery life (1.5h charging / 40h battery life) • Better sync performance IR Emitter...
  • Page 30 LG 3D TV 3D broadcasting LG 3D TV 3D broadcasting 3D for All types of broadcasting signals 1. Input of broadcasting signal 2. Press “3D” button for mode change Online 3. Select type of input source Broadcasting Broadcasting Video 4. In case 3D looks *abnormal, press “L/R Select”...
  • Page 31 Note: The Left and Right eye are actually seeing the same image but from a different angle, but for this explanation one is shown inverted from the other for clarity purposes simply to show there is a difference between the two images seen by each eye. September LCD TV 47LX9500...
  • Page 32 < Shutter glasses 3D > The 3D Glasses are then synchronized with the two different The image is broadcast images to give the 3D effect. using two different viewing They are blanked between scene angles every other frame. changes. September LCD TV 47LX9500...
  • Page 33 Active glasses 3DTV components Active glasses 3DTV components Battery Receiver TN LCD shutter Sync signal TV with built in Shutter Actuator IR Transmitter September LCD TV 47LX9500...
  • Page 34 - All Formats of input available and conversion technology development - Full HD input available - 3D Enhancement 1) Side by Side 1) Line by Line 2) Top and Bottom 2) Frame by Frame 3) Checkerboard 3D Formatter 4) Frame Sequential (Full Resolution available) September LCD TV 47LX9500...
  • Page 35 Possible *FPGA (Main) or *FRC (T-CON/3D) has problems. • Main P7800 pin 49 Replace It or T-CON/3D Board. •T-CON/3D P802 pin 2 *FPGA: Frame Packer For details about making the 3D Sync line check, see next page. *FRC: Frame Rate Converter September LCD TV 47LX9500...
  • Page 36 5.3V p/p 12 MHz +5V_EMITTER 5.1V Open 5.5V p/p 3D_SYNC 1.6V Open 60 Hz IC100 Q102 5) 5.1V 4) 5.1V B) 0V 6) 0V 3) 1.6V E) Gnd 7) 0V 2) 2.15V C) 3.5V 8) Gnd 1) 5.1V September LCD TV 47LX9500...
  • Page 37 • For example, when you see the display 1m away from the image. TV, the distance of any 3D image popping out should be within 38cm. September LCD TV 47LX9500...
  • Page 38 DISASSEMBLY SECTION Disassembly: This section of the manual will discuss Disassembly, Layout (Circuit Board Identification) of the 47LX9500 LCD Direct View Television. Upon completion of this section the Technician will have a better understanding of the disassembly procedures, the layout of the printed circuit boards and be able to identify each board.

  • Page 39: Removing The Back Cover

    Putting in an improper screw when reassembling may Cause damage. Two screws under Stand frame. The AC Cord Stand Base is Glass Does Not unplug Handle with Care The Stand has to be removed before removing the back. September LCD TV 47LX9500...
  • Page 40 Extension Board B (Main) Inverter Secondary Inverter Main Power Supply (SMPS) Woofer LVDS Cable Main Board Keyboard T-CON/3D Panel Connection To Logo Points IR/LED LG Logo 3D Emitter Invisible Invisible Speaker Right Speaker Left Board Board Board September LCD TV 47LX9500...
  • Page 41 47LX9500 Connector Identification Diagram 47LX9500 Connector Identification Diagram If the Panel is replaced, reset the UTTTime. Service Menu, System 1 Item 12 TFT PANEL p/n: AFB73089901 V105~V112 CN11 CN22 CN33 V25~V32 V73~V80 CN3 CN2 CN23 INVERTER CN104 CN101 CN32 INVERTER...

  • Page 42: Power Supply Board Removal

    P201, P205, P204 and AC SK101 fits very In SK101. snug into it’s connector. Remove the 6 screws indicated by the arrows. Press in on the two tabs AC In to release lock SK101 September LCD TV 47LX9500...

  • Page 43: Removing The Main Board

    Main board holding the Metal board. plate in place. NOTE: Always check on P8800 P2200 top and behind the Large ICs. And look for a piece of Chocolate (Heat Transfer Material). Be sure to transfer to new Board if present. September LCD TV 47LX9500...
  • Page 44 Removing the Main Board notice Removing the Main Board notice Note: Behind the Main board are pieces of Chocolate (Heat transfer material). Be sure to replace these pieces if any should fall. Chocolate Chocolate Chocolate Chocolate September LCD TV 47LX9500...
  • Page 45 NOTE: If Servicing the Board, leave the screws installed to provide stability and grounding. On CN2, CN3, CN4 and CN5 Flip the locking tab upward, pull the ribbons out. The Inverter (Secondary) will run without Local Dimming signals being provided by CN11 September LCD TV 47LX9500...
  • Page 46 NOTE: If Servicing the Board, leave the screws installed to provide stability and grounding. On CN104 and CN105 Flip the locking tab upward, pull the ribbons out. The Inverter (Secondary) will run without Local Dimming signals being provided by CN103 September LCD TV 47LX9500...
  • Page 47 3. Disconnect P802, P803, P804, P805 and P806. 4. Remove the 4 screws securing the T-CON/3D. P803 P802 Fig. 1 P804 Stand Bracket Fig. 2 Push In Push In P802 P806 P805 P805 P806 Flip up the Locking mechanism to release ribbon cable. September LCD TV 47LX9500...
  • Page 48 Removing the T CON/3D Board Notice Removing the T CON/3D Board Notice Note: Behind the T-CON/3D is a piece of Chocolate (Heat transfer material). Be sure to replace this piece if it should fall. Chocolate September LCD TV 47LX9500...
  • Page 49 Lift the board straight up. To the Main To the Main P2000 P8200 IR board / Intelligent Sensor To the Keyboard Motion Remote IR Filter is on the front side. Be careful not to loose it. September LCD TV 47LX9500...

  • Page 50: Troubleshooting

    TROUBLESHOOTING SECTION TROUBLESHOOTING SECTION Troubleshooting: This section of the manual will discuss troubleshooting. Upon completion of this section the Technician will have a better understanding of how to diagnosis and resolve problems. September LCD TV 47LX9500...

  • Page 51: Power Supply Section

    24V is routed out P201 pins 2, 3 and 4. P204 Connector: (To Inverter Main Board) 24V is routed out P204 pins 1 through 5. P205 Connector: (To Inverter Secondary Board) 24V is routed out P205 pins 1 through 5. September LCD TV 47LX9500...
  • Page 52 Power Supply (SMPS) Board Layout Power Supply (SMPS) Board Layout p/n EAY60908801 F101 3.15A/250V STBY 4.11V Run 392V From Hot Gnd F501 3.15A/250V STBY 161V Run 391V From Hot Gnd F100 6.3A/250V AC Protect Hot Ground Shock Hazard September LCD TV 47LX9500...
  • Page 53 47LX9500 Television Start Up Sequence 47LX9500 Television Start Up Sequence CN104 CN101 AC In POWER SUPPLY (SMPS) P205 Inverter Primary side fuse: Stand-By 161V Secondary Run 392.6V (Hot Gnd) CN104 CN103 CN25~CN33 24V B+ for the Inverters No AC Det in...
  • Page 54 47LX9500 Television Turn On Commands Circuit Drawing 47LX9500 Television Turn On Commands Circuit Drawing R8003 22KΩ +12V MAIN Board MAIN Board Q8004 R8010 10KΩ L8000 P7802 P7800 LVDS R8001 Q8003 Q8001 R8011 1.8K 11.79V 11.8V Panel_Vcc (12V) T-CON T-CON 1.8V 0.68V...
  • Page 55 Check that the 24V and 12V power supplies are turned on, • P201 (12V pins 17, 19 and 21) • P201 (24V pins 2, 3 and 4) • P204 and P205 (24V pins 1 through 5) to the Inverters (2) Remove AC power September LCD TV 47LX9500...
  • Page 56 Check the connections to the Inverters. If the 24V and the Inverter On command is arriving at the Inverters in, then see Inverter Section for further testing. Note: Either Inverter can run separately. REMOVE AC POWER: September LCD TV 47LX9500...

  • Page 57: Power Supply Connector P201 Voltage And Diode Check

    Open level, OSD Backlight setting and then Intelligent Sensor 11.88V 1.39V (room light condition) Output from the Video Processor Open IC900. Range 0.37V to 3.3V. Open ERROR Open Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 58 (1) PDIM Pin 20 can vary according to incoming video IRE level, OSD Backlight setting and then Intelligent Sensor (room light condition) Output from the Video Processor IC900. Range 0.37V to 3.3V. I-C is the Inverter On Control Signal Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 59 Pins 1 and 2 for STBY and RUN. F100 Bottom Right of SMPS F100 (Diode Check) Main Power Switch Closed Red or Black Lead on Fuse (Open) F100 Other Lead on Hot Ground 6.3A/250V AC IN SK101 September LCD TV 47LX9500...
  • Page 60 3.15A/250V STBY 159.6V Run 392.6V From Hot Gnd STBY 2.9V Run 393.3V If reading the voltage on F101 right after power off, it takes a very long time to bleed down to the reading given here. September LCD TV 47LX9500...

  • Page 61: Inverter (Led Backlights) Section

    Each Extension board has 9 connections to the Backlight LEDs. There are 4 LEDs per/block, 216 Blocks, 8 Blocks per/cartridge, 3 Cartridges per/bar, 9 bars (rows), 32 LEDs per/cartridge, 96 LEDs per/bar. With a total of 864 LEDs. September LCD TV 47LX9500...
  • Page 62 IOP Structure IOP Structure Integrated Optic Plate Integrated Optic Plate The Image below shows the actual Backlight Bars used in the 47LX9500. The Cartridges are assembled from the bottom to the top, like shingles on a roof. Cartridge Cartridges Removed...
  • Page 63 IOP Structure Information 4 LEDs per/block (216 Blocks) 8 Blocks per/cartridge, 9 bars with 3 cartridges per/bar, 32 LEDs per/cartridge, 96 LEDs per/bar. 864 LEDs total. BLU (Backlight Unit) Cartridge There are 3 Cartridges per/bar. Cartridge September LCD TV 47LX9500...
  • Page 64 IOP Cartridge Breakdown IOP Cartridge Breakdown This shows the 47” Cartridge Breakdown The Individual LEDs can be checked using the Diode Mode forward bias test. The LED will light. September LCD TV 47LX9500...
  • Page 65 47LX9500 IOP Block Structure Information 47LX9500 IOP Block Structure Information 47LX9500 TFT PANEL p/n: AFB73089901 CN33 CN22 CN11 V73~V80 V25~V32 V105~V112 CN23 CN32 CN21 V81~V88 V33~V40 V113~V120 CN10 CN31 CN20 V1~V8 V41~V48 V121~V128 CN12 CN30 V9~V16 V49~V56 V29~V136 CN19 CN24...
  • Page 66 4. Sheet DBEFD 5. Sheet Prism U 6. Sheet Prism L 7. Sheet Diffuser L 8. Plate Diffuser 9. Cartridge Ass’y 10. Cover Bottom 11. Driver Boards (2) 12. Extension Boards (3) 13. FRC Flexible Ribbon Cables September LCD TV 47LX9500...
  • Page 67 47LX9500 Inverter Main Layout 47LX9500 Inverter Main Layout A0950 24.7V U6 24.7V 12A/65V INVERTER MAIN 12.9V 12.9V INVERTER L101 MAIN U101 13V POWER A0950 SUPPLY 12.9V For CN2 / CN3 295KHz DO NOT 13V POWER 39.5V p/p SUPPLY MEASURE For CN4 / CN5 3.3V...
  • Page 68 47LX9500 Inverter Secondary Layout 47LX9500 Inverter Secondary Layout DO NOT U103 MEASURE 3.3V L207 Q108 Q109 3.4V 12A/65V CN104 24.7V 24.7V U101 Q106 INVERTER SECONDARY C101 C151 CN101 Y501 Q103 8MHz Q101 L206 12.9V Q501 Q102 CN105 295KHz U501 39.5V p/p Q105 12.8V...
  • Page 69 47LX9500 Inverter (Main) B+ Routing 47LX9500 Inverter (Main) B+ Routing To CN 1 Extension Left To CN 2 Extension Left CN3 B+ for LED Blocks. CN2 B+ for LED Blocks. Pins 1~2, 11~12, 21~22, Pins 9~10, 11~12, 31~32, 41~42. 21~22, 31~32 24.7V...
  • Page 70 Extension Right Q102 12.9V CN105 B+ to LED Blocks pins 1~2, 11~12, Q105 21~22,31~32, 41~42. L206 12.8V CN103 Q106 Q105 Power for Secondary Extensions Board (Right Side) Connectors. To Connectors CN23 and CN24. 18.2V 12.9V 24.7V 12.9V September 2010 47LX9500 LCD-DV...
  • Page 71 Q4, Q7 Q105 Q4, Q7 Q105 14.5V p/p 296KHz 39.53V p/p 296KHz 30.1V p/p 296KHz Each of the Pin numbers for the Components listed Q5, Q8 or Q106 Pin 3 is Ground above are the same. September LCD TV 47LX9500...
  • Page 72 I2C data back to the Main board’s Microprocessor. Minimum P-DIM Voltage 0.37V 0% Cust Backlight Setting Backlights Dim Brightness and Contrast adjustments do not affect P-DIM Analog Dimming is not used. It is a fixed voltage. Also called BR1, VBR-A, BCM-VBR-A, ADM September 2010 47LX9500 LCD-DV...
  • Page 73 0.56V (Black Lead on Fuse) 12A/65V Center Left of the Board Inverter (Secondary) Just up and right of CN101 Connector F101 (Diode Mode Check) 1.34V (Red Lead on Fuse) 0.55V (Black Lead on Fuse) F101 12A/65V September LCD TV 47LX9500...
  • Page 74 Inverter Crystals Y1, Y501 (Main) and Y501 on (Secondary) Inform ation Inverter Crystals Y1, Y501 (Main) and Y501 on (Secondary) Inform ation Crystal Y301 Y501 Use Top Leg Inverter (Main) 8Mhz Inverter (Secondary) Y501 Use Bottom Leg September LCD TV 47LX9500...
  • Page 75 CN2 13V Line Pins CN3 13V Line Pins CN4 13V Line Pins CN5 13V Line Pins 1~2, 11~12, 9~10, 11~12, 1~2, 11~12, 21~22, 11~12, 21~22, 31~32, 9~10, 19~20, 29~30, 21~22,31~32, 41~42 21~22, 31~32 31~32, 41~42 41~42 39~40, 49~50 September LCD TV 47LX9500...
  • Page 76 Turn off the set and unplug the connector to the Inverters coming from the Main board. If the brightness returns to normal, the Main board is defective. If not, investigate all inverter voltages, if OK, use the grounding of each V block procedure to test the panel’s backlight LEDs. September LCD TV 47LX9500...
  • Page 77 CN4 pin 08 0.7V~3.9V white and black CN4 pin 07 0.7V~3.9V screens CN4 pin 06 0.7V~3.9V CN4 pin 05 0.7V~3.9V CN4 pin 04 0.7V~3.9V CN4 pin 03 0.7V~3.9V CN4 pin 02 12.55V CN4 pin 01 12.55V September LCD TV 47LX9500...
  • Page 78 IRE level, OSD Backlight setting and then Intelligent S_MOSI *0.18V~0.28V 1.87V Sensor (room light condition) Output from the Video S_SCLK 2.72V 1.87V Processor IC900. Range 0.37V to 3.3V. *Black to White Inverter On/Off Control Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 79 PDIM Pin 11 can vary according to incoming video *Black to White IRE level, OSD Backlight setting and then Intelligent Sensor (room light condition) Output from the Video Processor IC900. Range 0.37V to 3.3V. Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 80 Inverter Main and Secondary Local Dimming Control Signals Wavefo Inverter Main and Secondary Local Dimming Control Signals Wavefo For clearer details see the Interconnect Diagram September LCD TV 47LX9500...
  • Page 81 P806: 16V pins 79-80, 3.34V pins 76-77, 8.17V pins 73-74, -4.9V pin 71, 25.63V pin 66, 6V pins 63-64, “8V” pin 61, 15.75V pins 44 and “3.33V” pin 36. Also, See the 11X17 Foldout (Interconnect Diagram) for more details. September LCD TV 47LX9500...
  • Page 82 3.4V Pins 4-5 8V Pin 61 8V Pin 21 16V Pins 79-80 IC801 16V Pins 1-2 P806 P805 -5V Pins 71 -5V Pins 11 25.6V Pins 66 6V Pins 18-19 6V Pins 63-64 25.6V Pins 16 September 2010 47LX9500 LCD-DV...
  • Page 83 CON/3D (TFT Drive) Board Checks CON/3D (TFT Drive) Board Checks T-CON/3D Board (Locations) Check (12V) P803 P802 Check for 12V Voltage supplied from P803 Pins 1-2 and/or P802 pins 49-51. September LCD TV 47LX9500...
  • Page 84 CON/3D 12V ( VLCD_POWER ) Power Development Diagram CON/3D 12V ( VLCD_POWER ) Power Development Diagram September LCD TV 47LX9500...
  • Page 85 Development Checks Development Checks The development for the voltages for P805 and P806 connectors to the panel are shown here. This is an excerpt from the Interconnect diagram. Panel voltages are outlined in the rounded cornered boxes. September LCD TV 47LX9500...
  • Page 86 CON/3D (TFT Drive) Panel Voltage Checks CON/3D (TFT Drive) Panel Voltage Checks See the previous page for the development for the voltages for P806 and P805 connectors which are Panel voltages. September LCD TV 47LX9500...
  • Page 87 CON/3D Control Board X100 Crystal Checks CON/3D Control Board X100 Crystal Checks X100 1.65V DC 1.71V DC 25Mhz 3.25V p/p 4.8V p/p Runs when set is On T-CON/3D Board September LCD TV 47LX9500...
  • Page 88 47LX9500 T-CON Component Voltages 47LX9500 T-CON Component Voltages IC701 1) Gnd IC202 IC304 1) 0.75V IC306 IC600 1) Gnd 1) n/c Q700 1) Gnd Q803 B) 2.52V 2) 11.68V 2) 3.2V 2) 5.0V 2) 2.5V 2) 3.26V E) 2.52V DC-DC 3) 5.26V...
  • Page 89 1.67V source is played. (1.63V) RRXACK- 42-46 1.16V 1.67V RRXACK+ 1.20V 1.67V T-CON/3D B+ 48-51 PANEL_VCC 11.59V Open RRXA3- 1.20V 1.67V Diode Check taken with meter in Diode Mode with all Connectors Removed RRXA3+ 1.14V 1.67V September LCD TV 47LX9500...
  • Page 90 11.55V Open P804 P804 Connector "T-CON/3D Board“ to P7803 "Main" LABEL Diode Check E_TCK Open E_TDO 3.33V Open E_TMS 0.35V Open E_TDI 3.32V Open Diode Check taken with meter in Diode Mode with all Connectors Removed September LCD TV 47LX9500...
  • Page 91 3.33V RRMVCLKP 1.19V VCOM ROUT RRMVCLKN 1.18V RLMVOP 0.15V Z_OUT RLMVON 0.17V RRMV4P 1.13V RLMV1P 0.14V RRMV4N 1.24V 15.75V RLMV1N 1.24V RRMV5P 1.11V 15.75V RLMV2P 1.13V RRMV5N 1.12V RLMV2N 1.22V RRMV6P 1.12V 13.35V RRMV6N 1.22V 12.27V September LCD TV 47LX9500...
  • Page 92 HVDD (8V) LRMV0N 1.28V 11.07V 8.2V HVDD (8V) LRMV1P 1.15V 11.07V 8.2V LRMV1N 1.26V 10.27V VCC (3.3V) LRMV2P 1.17V 8.31V 3.4V VCC (3.3V) LRMV2N 1.27V 5.74V 3.4V VDD (16V) LRMVCLKN 1.21V 4.94V VDD (16V) LRMVCLKP 1.23V September LCD TV 47LX9500...

  • Page 93: Main Board Section

    • 5V_Normal which is used to make 5V TU • 5V_TU BCM IC900 Video Processors • 3.3V_TU • 1.2V • 1.26V_TU IC9701 Tru-Motion and Local Dimming IC. WIRELESS VOLTAGES • 1.26V_MEMC, 1.5V_MEMC, • 24V (Switched from 24V from SMPS) D1.5V, D1.8V, and 3.3V September LCD TV 47LX9500...

  • Page 94: Mainboard Layout

    This is normal. See next page for P1000 component identification P8100 P2000 to Motion Remote Component or Composite These connectors are Mini plug type Wireless Media Box Remote P8800 To Left Speaker P2200 to Logo board September LCD TV 47LX9500...
  • Page 95 47LX9500 Main Layout 47LX9500 Main Layout P7901 P7803 P2401 P7800 To SMPS NVRAM IC601 LVDS P8000 P7802 To T-CON 3D Sync INV Main P7900 Local Dimming To T-CON X9700 INV Main INV_CTL Sw IC9703 Local Dimming P2100 Q8005 IC2101 EEPROM IC9701 1.8V Dimming...
  • Page 96 47LX9500 Main (Front Side) Component Voltages IC300 Earphone Amp IC601 NVRAM IC8002 D1.8V IC8005 (+3.3V_NORMAL) IC9703 EEPROM Regulator And D3.3V Regulator for LG5111 [1] 0V [1] n/c [1] 5V [1] Gnd [1] Gnd [2] 0V [2] 0V [2] 3.35V (B+) [2] 11.74V (B+)
  • Page 97 47LX9500 Main (Back Side) Layout 47LX9500 Main (Back Side) Layout Power On Power On Driver Q8002 Q8000 IC602 DDR_VTT Reg IC606 IC604 Q8205 Wireless IR_PASS Q8203 Q901 FLASH_WP for IC901 CEC Pull-Up D8312 HDMI CEC Q8308 IC8100 EEPROM for Micro...
  • Page 98 47LX9500 Main (Back Side) Component Voltages IC602 D1.8V IC8400 IC8700 Wireless Q200 (1.8V_HDMI) Q8203 IR Wireless Pass Regulator H/V Sync Buffer Switch 2nd Driver [1] 0V (Gnd) [1] 1.9V [1] 0V (3.3V Dongle In) S 1.83V (Out) B 0V [2] 3.29V (PWR On/Off1 Ctl) [2] 1.9V...
  • Page 99 IC1001 BCM Overtone Runs when set is On X1001 (54Mhz) 746mV p/p Either leg 3.55V p/p 1.6V 4.5V p/p 25Mhz 725mV p/p Do not measure with Digital Volt meter Runs when set is On MAIN Board September LCD TV 47LX9500...
  • Page 100 IC8100 Micro Crystal X8100 3.48V p/p Top leg Either leg MAIN Board 2.46V p/p Bottom leg Runs all the time X8101 32.768KHz 3V p/p Can not read 1.47V A Waveform on 1.8V left side Runs all the time September LCD TV 47LX9500...
  • Page 101 P-DIM 0.37V~3.3V Open according to incoming video 11.88V Open IRE level, OSD Backlight setting and Intelligent Sensor Open (room light condition). Open Range 0.37V to 3.3V. ERROR Open Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 102 3.34V 1.04V RRXACK+ V_SYNC 1.2V 0.97V 3.33V 0.998V RRXBCK+ RRXACK- *3D_Sync_Out 1.2V 0.97V 1.16V 1.15V 0.03V Open RRXBCK- 1.16V 1.15V *Pin 50 Only active when a 3D 5.5V p/p 60 Hz source is played. (1.63V) 3D-Sync September LCD TV 47LX9500...
  • Page 103 1.18V LED_LOGO 0.82V 2.2V 1.57V 1.52V Open +3.3V_Normal 3.33V 0.51V LED_R/BUZZ Open Clock pulses only present when Intelligent Sensor is turned on. (3.7V p/p) IR pulses (2.5V p/p) Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 104 M3_MOSI 1.07V M3_SCLK 1.07V S_CS_N 1.96V 1.05V S_MOSI *0.15V~0.32V 1.05V S_SCLK 2.72V 1.05V P2200 "Main" To "LG LOGO" LABEL Diode Check 3.5V_ST 3.46V 3.37V Open Logo Drive 2.19V 0.69V Open Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 105 (Use Dongle side to read voltages. Remove cover). Diode Mode values taken *24V Switched from Q8701 Drain Back side of the board. with all Connectors Q8701 turned on by Q8700 front side of the board. Removed Q8700 turned on by Microprocessor pin 38. September LCD TV 47LX9500...
  • Page 106 Diode Check PANEL_VCC 11.55V Open PANEL_VCC 11.55V Open P7803 "Main" To "T-CON/3D" P807 P7803 LABEL Diode Check E_TCK Open E_TDO 3.33V Open E_TMS 0.35V Open E_TDI 3.32V Open Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 107 0.51V M_REMOTE_RX 3.3V Open M_REMOTE_TX 3.3V Open M_RFModule_Reset 3.05V Open 2.98V Open 2.98V Open P2401 "Main" To "3D-Emitter" P2401 LABEL Diode Check +5V_EMITTER 5.1V Open 3D_SYNC 0.03V Open Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 108 SPK2-R(+) 12.35V Open SPK2-R(-) 12.35V Open P2100 "Main" To "Speaker Woofer" LABEL Diode Check SPK_Woofer(-) 12.35V Open SPK_Woofer(+) 12.35V Open There are no Stand-By Voltages for the Connector Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 109 Audio B+ 24.7V Mute Pins 49-52 Pin 25 Q8800 (Mute) Active Low. Note: 3.3V input (pin 3) from IC8005 Location: 3.3V_Normal Regulator Top left of IC8801. Normal 3.3V Collector to Pin 25 of all three ICs. September LCD TV 47LX9500...

  • Page 110: Front (Ir, Intelligent Sensor And Moving Led) Section

    IR (Infrared Remote Sensor) and the Intelligent Sensor. This board also connects with the Soft Touch Key Board and the Center LG Logo board. The Center LG Logo lights after power on and the picture appears. Then dims down in about 2 seconds. At power off, it does the reverse.
  • Page 111 Front IR Board (Connections Identified) Front IR Board (Connections Identified) p/n EBT61093402 Motion Intelligent IR Sensor Remote Sensor Sensor Power LEDs Front of TV LED Driver To Key Back of TV Board Motion Remote To Main Board September LCD TV 47LX9500...
  • Page 112 3.37V Open LED_LOGO 0.82V Open 1.57V 1.52V Open +3.3V_Normal 3.33V Open LED_R/BUZZ Open Pulses only present when Intelligent Sensor is turned on. (3.7V p/p) IR pulses (2.5V p/p) Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 113 4.7K VOL+ Key 1 Key 2 2.76V 2.7V VOL- Key 1 4.7K ENTER 270Ω Key 1 MENU Key 1 1.82K INPUT Key 2 270Ω POWER Key 2 1.82K Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...
  • Page 114 The Motion Remote utilizes a specialized receiver to receive the IR signal and this information is then routed to P2000 and on to the BCM IC for pointer positioning and the other functions. Motion Remote “Magic Remote” AKB73035402 September LCD TV 47LX9500...
  • Page 115 J4 "Front IR" to “Main Board“ P2000 Motion Remote Diode Label STBY Check 3.3V_Normal 3.33V 1.17V M_REMOTE_RX 3.3V 1.95V M_REMOTE_TX 3.3V 1.95V M_RFModule_Reset 3.05V Open 2.98V 1.96V 2.98V 1.96V Diode Mode values taken with all Connectors Removed September LCD TV 47LX9500...

  • Page 116: Invisible Speaker Section

    INVISIBLE SPEAKER SECTION INVISIBLE SPEAKER SECTION Full Range Speaker p/n EAB61353002 The 47LX9500 contains the 8 Magnet Invisible Speaker system. The Full Range Speakers point downward, so there is no front viewable speaker grill or air ports. Front View Back View...

  • Page 117: Interconnect Diagram (11 X 17 Foldout Section)

    This Power Point shows a graphical representation of the 11 X 17 This Power Point shows a graphical representation of the 11 X 17 foldout page so clarity is limited. foldout page so clarity is limited. September LCD TV 47LX9500...
  • Page 118 47LX9500 INTERCONNECT DIAGRAM Note: If a particular block is exhibiting a dimmer level that the other or the overall brightness seems dim, be sure to first check the customer’s Menu setting for Backlights. Raise the percentage and see if the overall brightness returns to normal. If not,...
  • Page 119 42LE8500 Inverter Main and Secondary Local Dimming Control Signals Waveforms 42LE8500 Inverter Main and Secondary Local Dimming Control Signals Waveforms CN11 INVERTER (MAIN) FROM P7900 MAIN BOARD Inverter Main CN11 pin 01 Inverter Main CN11 pin 02 Inverter Main CN11 pin 02 Inverter Main CN11 pin 03 Inverter Main CN11 pin 03 Black or White Screen...
  • Page 120 47LX9500 MAIN (FRONT SIDE) SIMICONDUCTORS IC300 Earphone Amp IC601 NVRAM IC8001 D1.2V and A1.2V IC8004 A2.5V Regulator IC9702 (+1.8V_L/Dimming) Q8003 PANEL_VCC Regulator for USB Regulator Control 2nd Driver [1] 0V [1] n/c [1] 0V (Gnd) [1] n/c [1] Gnd B 0.66V...
  • Page 121 47LX9500 T-CON/3D Component Voltages 47LX9500 T-CON/3D Component Voltages IC701 IC202 IC304 IC306 IC600 1) Gnd 1) Gnd 1) 0.75V 1) n/c Q700 1) Gnd Q803 B) 2.52V 2) 11.68V 2) 5.0V 2) 3.2V 2) 2.5V 2) 3.26V E) 2.52V DC-DC 3) 5.26V...
  • Page 122 47LX9500 47LX9500 Conclusion Conclusion Direct View LCD Direct View LCD Page Page This concludes the 47LX9500 training session.

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