Page 2 - Extension Boards; • Switch Mode Power Supply; Troubleshooting Section:; Board Operation Troubleshooting of :; • Main Board; Inverter Boards Main and Secondary (LED Backlight Drivers); Disassembly Section:; Removal of Circuit Boards; Ft Control Board; Leandro
July 2010 LCD TV 47LE8500 2 OUTLINE OUTLINE • Extension Boards • Switch Mode Power Supply Preliminary Section: Troubleshooting Section: Board Operation Troubleshooting of : Contact Information, Preliminary Matters, Specifications,LCD Overview, General Troubleshooting Steps, Signal Distribution, Disa...
Page 3 - Section 1; Overview of Topics to be Discussed
July 2010 LCD TV 47LE8500 3 47LE8500 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. Basic Troubleshooting Techniques which can save time and ...
Page 6 - Customer Service Website; Also available on the Plasma Page:
LG Contact Information LG Contact Information Customer Service (and Part Sales) (800) 243-0000 Technical Support (and Part Sales) (800) 847 7597 Technical Support (and Part Sales) (800) 847-7597 USA Website (GSFS) http://gsfs-america.lge.com Customer Service Website http://www.us.lgservice.com Knowl...
Page 7 - Safety and Handling Regulations; adjustments from the Menu.; Checking Points to be Considered; LCD Direct View Overview
July 2010 LCD TV 47LE8500 7 Safety and Handling Regulations 1. Approximately 20 minute pre-run time is required before making any picture performance adjustments from the Menu. 2. Refer to the Voltage/Current silk screening on the Switch Mode Power Supply.3. C-MOS circuits are sensitive to static el...
Page 8 - Define
July 2010 LCD TV 47LE8500 8 Basic Troubleshooting Steps Basic Troubleshooting Steps Define, Localize, Isolate and Correct • Define Look at the symptom carefully and determine what circuits could be causing the failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and check ...
Page 12 - Key TV Features
July 2010 LCD TV 47LE8500 12 Basic Specifications Basic Specifications Key TV Features • INFINIA Series*• Full LED Slim w/Local Dimming• THX Certified Display• NetCast™ Entertainment Access*(Wi-Fi® Ready)• Wireless 1080p Ready*• DLNA Certified®• TruMotion 240Hz• Full HD 1080p Resolution• 9M:1 Dynami...
Page 14 - FULL HD RESOLUTION 1080P HD Resolution Pixels:
July 2010 LCD TV 47LE8500 14 47LE8500 Logo Familiarization Page 2 of 4 47LE8500 Logo Familiarization Page 2 of 4 Invisible SpeakerPersonally tuned by Mr. Mark Levinson for LG TAKE IT TO THE EDGE newly introduces ‘Invisible Speaker’ system, guaranteeing first class audio quality personally tuned by M...
Page 15 - Clear Voice Clearer dialogue sound
July 2010 LCD TV 47LE8500 15 47LE8500 Logo Familiarization Page 3 of 4 47LE8500 Logo Familiarization Page 3 of 4 AV Mode "One click" Cinema, THX Cinema, Sport, Game mode. TAKE IT TO THE EDGE is a true multimedia TV with an AV Mode which allows you to choose from 4 different modes of Cinema, ...
Page 16 - Wireless Ready
July 2010 LCD TV 47LE8500 16 47LE8500 47LE8500 Logo Familiarization Page 4 of 4 Logo Familiarization Page 4 of 4 Wireless Ready Wireless 1080p Connectivity lets you cut loose from messy wires and still get a stunning Full HD picture. Disclaimer: Wireless media kit required and sold separately. Pictu...
Page 19 - USB1 or USB2 for Software; MAIN BOARD
TV Rear Input / Output Jacks TV Rear Input / Output Jacks Rear In/Out Jacks Side In/Out USB1 or USB2 for Software Upgrades, Wireless Dongle, Music and Photos Rear In/Out Jacks USB 2 LAN USB 2 USB 1 LAN USB 1 Component or Composite Video/Audio 3 Wireless Media Box Remote Jack Head Phones MAIN BOARD R...
Page 21 - Automatic Internet Software Update
July 2010 LCD TV 47LE8500 21 Software Updates (New and Changed Functions) Continued Software Updates (New and Changed Functions) Continued Automatic Internet Software Update - Off : Automatic Software update does not work- On : if new Software released, Software download notice appears at turn on wi...
Page 22 - Software Files are now available from
July 2010 LCD TV 47LE8500 22 1) Create an LG_DTV folder on the USB Flash Drive 2) Copy new software (xxx.epk) to "LG_DTV" folder. Make sure to have correct software file. 3) With TV turned on, insert USB flash drive.4) You can see the message “TV Software Upgrade” (See figure to right) 5) Cu...
Page 23 - the incorrect file
July 2010 LCD TV 47LE8500 23 Manual Software Download: Manual Software Download: Prepare the Jump Drive as described in the “USB Automatic Download” section and insert it into either of the USB ports.Bring up the Customer’s Menu and scroll to “OPTIONS”.Press the “FAV” key 7 times to bring up the Man...
Page 26 - then Press “Select” key.; When PCM EDID D/L was selected
July 2010 LCD TV 47LE8500 26 Service Menu: Downloading EDID Data Pg 2 of 2 Service Menu: Downloading EDID Data Pg 2 of 2 3) Highlight “Start” then Press “Select” key. 4) When Writing appearsDownloading in progress 5) Downloading Complete When PCM EDID D/L was selected When AC3 EDID D/L was selected ...
Page 27 - Weight with Stand 70 lbs; There must be at least 4 inches of Clearance on all sides; Wattage
47LE8500 Product Dimensions 47LE8500 Product Dimensions 7.7/8" 200mm 27.13/16" 706.43mm 44.3/16" 1122.68mm Remove 4 screws to remove stand for wall mount 19.11/16" 500mm 30.3/16" 767.08mm 1.3/8" 34.93mm 10.13/16" 274.32mm 7.7/8" 200mm 8.7/16" 214mm 11.5/8" 295...
Page 28 - This section of the manual will discuss Disassembly, Layout
July 2010 LCD TV 47LE8500 28 DISASSEMBLY SECTION DISASSEMBLY SECTION Disassembly: This section of the manual will discuss Disassembly, Layout (Circuit Board Identification) of the 47LE8500 LCD Direct View Television. Upon completion of this section the Technician will have a better understanding of ...
Page 29 - The Stand has to be removed before removing the back.; Removing the Back Cover; The AC Cord
July 2010 LCD TV 47LE8500 29 Remove the 26 screws indicated. Pay attention to the size and type of screw as there are many different types. Putting in an improper screw when reassembling may Cause damage. The Stand has to be removed before removing the back. Removing the Back Cover Removing the Back...
Page 30 - Warning: The Frame has
July 2010 LCD TV 47LE8500 30 Circuit Board Layout Circuit Board Layout Main Board Power Supply (SMPS) Invisible Speaker Right IR/LED Board Soft Touch Keyboard Inverter Main Inverter Secondary Extension Board A (Main) Extension Board B (Main) Extension Board (Secondary) LVDS Cables Panel Connection P...
Page 31 - 7LE8500 Connector Identification Diagram
MAIN BOARD POWER SUPPLY N/C Speaker (Front Left) AC In IR LED 47LE8500 Connector Identification Diagram 47LE8500 Connector Identification Diagram n/c TFT PANEL 31 July 2010 47LE8500 LCD-DV Speaker (Front Right) Soft Touch Keys INVERTER (Main) INVERTER (Secondary) p/n: EBU60842601 for AUSWLH p/n: EBU...
Page 32 - Disconnect
July 2010 LCD TV 47LE8500 32 Power Supply Power Supply Board Removal Board Removal Disconnect P201, P205, P204 and AC In SK101. P201 Press in gently on the two tabs to release lock P201 SK101 Remove the 6 screws indicated by the arrows. AC In P205 P204 SK101 fits very snug into it’s connector. Press...
Page 35 - Use caution, do not allow screws to fall.; screws installed to provide stability and
July 2010 LCD TV 47LE8500 35 Removing the Inverter (Secondary) Board Removing the Inverter (Secondary) Board Remove the 4 screws indicated by the arrows. Remove the Inverter. Disconnect CN101, CN103, CN104 and CN105. CN103 Use caution, do not allow screws to fall. NOTE: If Servicing the Board, leave...
Page 36 - IR board / Intelligent Sensor; Disconnect CON1, CON2 and CON3 connectors.; CO; Tab; Press upward on the two tabs at the top. Tilt the
July 2010 LCD TV 47LE8500 36 Removing Front IR Board Removing Front IR Board IR board / Intelligent Sensor p/n EBR64966401 Disconnect CON1, CON2 and CON3 connectors. CO N2 CON3 Tab Tab CON1 Press upward on the two tabs at the top. Tilt the board downward and lift straight up. Leandro Palmeira Downlo...
Page 37 - This section of the manual will discuss troubleshooting.
July 2010 LCD TV 47LE8500 37 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. Leandro Palmeira Downloaded...
Page 39 - From Hot Gnd
July 2010 LCD TV 47LE8500 39 Power Supply (SMPS) Board Layout Power Supply (SMPS) Board Layout Hot Ground Shock Hazard F101 3.15A/250V STBY 2.9V Run 393.3V From Hot Gnd F501 3.15A/250V STBY 159.6V Run 392.6V From Hot Gnd F100 6.3A/250V AC Protect p/n EAY60908801 Leandro Palmeira Downloaded From TV-M...
Page 40 - MAIN; Ft IRKey; Soft Touch Key
Inverter Main Inverter Secondary POWER SUPPLY (SMPS) 47LE8500 Power Supply Start Up Sequence 47LE8500 Power Supply Start Up Sequence 40 Inverter On Starts the Inverters 24V B+ for the Inverters Stand By 3.5V Remote or Power Button Key MAIN BOARD RL_ON 12V Video Processing InvOn Stand By 3.5V Reg 2 5...
Page 41 - SMPS; BCM
PWM-DIM (PWM Dimming) can vary according to incoming video IRE level, OSD Backlight setting and Intelligent Sensor (room light condition). Range 0. 37 V to 3.3V. 47LE8500 Television Turn On Commands Circuit Drawing 47LE8500 Television Turn On Commands Circuit Drawing R8019 100 Ω 11.9V Gnd Gnd Gnd Gn...
Page 43 - Continue if the 1; Leave original jumper in place.; Backlight On command.; Power Supply Board Backlights Test 2; Pin 1 is the
July 2010 LCD TV 47LE8500 43 Continue if the 1 st test was OK. Leave original jumper in place. (3) Add another jumper between (STBY_3.5V) pin 9, 10, 11 or 12 and Pin 18 (INV_On). (4) Apply AC Power. Simulating a Power and Backlight On command. Backlights Normal: a) If normal, the backlights should t...
Page 44 - Odd pins are on front row
July 2010 LCD TV 47LE8500 44 Diode Mode values taken with all Connectors Removed (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. 37 V to 3.3V. . Power Supply Conne...
Page 45 - can vary according to incoming video IRE level, OSD
July 2010 LCD TV 47LE8500 45 Power Supply Connector P204 / P205 Voltage and Diode Check Power Supply Connector P204 / P205 Voltage and Diode Check Diode Mode values taken with all Connectors Removed (1) PDIM Pin 20 can vary according to incoming video IRE level, OSD Backlight setting and then Intell...
Page 46 - Diode Mode values taken with all Connectors Removed; Bottom; Main Power Switch Closed; Other Lead on Hot Ground
July 2010 LCD TV 47LE8500 46 Power Supply Connector SK101 Voltage and Diode Check Power Supply Connector SK101 Voltage and Diode Check Diode Mode values taken with all Connectors Removed AC Voltage Readings (From Hot Ground)Pins 1 and 2 for STBY and RUN. OL N EL132 OL 120Vac L EL131 Diode Check Run ...
Page 47 - If reading the voltage on F101 right after
July 2010 LCD TV 47LE8500 47 Power Supply F101 and F501 Voltage Checks Power Supply F101 and F501 Voltage Checks F101 F101 3.15A/250V From Hot Gnd STBY 2.9V Run 393.3V F501 F501 3.15A/250V From Hot Gnd STBY 159.6V Run 392.6V If reading the voltage on F101 right after power off, it takes a very long ...
Page 49 - Cartridge; Integrated Optic Plate
July 2010 LCD TV 47LE8500 49 IOP Structure IOP Structure The Image below shows the actual Backlight Bars used in the 47LE8500. The Cartridges are assembled from the bottom to the top, like shingles on a roof. Cartridge Bar Cartridges Removed Integrated Optic Plate Integrated Optic Plate Leandro Palm...
Page 51 - Front Metal Plate
47LE8500 (IOP) Cartridge Breakdown 47LE8500 (IOP) Cartridge Breakdown 51 July 2010 50PK750 Plasma Back Metal Plate LED Bar 32 LEDs 4 LEDs per/block 8 blocks Lens (Reflector) White SheetLight Uniformity Connector Slots Each Connector has 10 pins. 2 are B+ 13V and 8 block controls. LED Front Metal Pla...
Page 53 - Flexible Ribbon Cables
July 2010 LCD TV 47LE8500 53 47 47 ” ” Explode View of the IOP Panel Explode View of the IOP Panel 1. Case-Top Ass’y2. TFT Panel Ass’y3. Guide Panel4. Sheet DBEFD5. Sheet Prism U6. Sheet Prism L7. Sheet Diffuser L8. Plate Diffuser9. Cartridge Ass’y 10. Cover Bottom 11. Driver Boards (2)12. Extension...
Page 58 - Each of the Pin
July 2010 LCD TV 47LE8500 58 Inverter Inverter 13V LED 13V LED B B + + DC to DC Converter Troubleshooting DC to DC Converter Troubleshooting 30V p/p 296KHz Q5, Q8 or Q106 Pin 1 13.5V p/p 296KHz Q4, Q7 or Q105 Pin 1 30V p/p 296KHz Q4, Q7 or Q105 Pin 3 1 3 2 Each of the Pin numbers for the Components ...
Page 61 - Use Top Leg
July 2010 LCD TV 47LE8500 61 Inverter Crystals Y1, Y501 (Main) and Y501 on (Secondary) Inform Inverter Crystals Y1, Y501 (Main) and Y501 on (Secondary) Inform ation ation Crystal Y301 Inverter (Main) Inverter (Secondary) Y501 Y501 Y1 Use Top Leg Use Bottom Leg 8Mhz Leandro Palmeira Downloaded From T...
Page 63 - Drive Signals being delivered to the LED Blocks V1 ~ V216
July 2010 LCD TV 47LE8500 63 LED Drive Signal and Troubleshooting Information LED Drive Signal and Troubleshooting Information Global Dimming (which affects every LED block at the same time) is accomplished by the P-DIM signal arriving on CN1 pin 11 (Inv Main) and CN101 pin 11 (Inv Secondary). As P-...
Page 66 - Inverter Run voltages taken with built in test pattern
July 2010 LCD TV 47LE8500 66 Inverter (Main) CN11 & Inverter (Secondary) CN103 (Voltage and D Inverter (Main) CN11 & Inverter (Secondary) CN103 (Voltage and D iode Check) iode Check) CN11 “Inverter Main” to “Main” P7900 Inverter Run voltages taken with built in test pattern Diode Mode values...
Page 67 - For clearer details see
July 2010 LCD TV 47LE8500 67 Inverter Main and Secondary Local Dimming Control Signals Wavefo Inverter Main and Secondary Local Dimming Control Signals Wavefo rms rms For clearer details see the Interconnect Diagram Leandro Palmeira Downloaded From TV-Manual.com Manuals
Page 71 - 7LE8500 Main (Front Side) Component Voltages
47LE8500 Main (Front Side) Component Voltages IC300 Earphone Amp IC700 (+1.26V_TU) IC8002 (D1.8V) IC8005 (+3.3V_NORMAL) IC8902 (+1.26V_MEMC) IC9102 DC to DC Pin Pin Regulator Pin Regulator Pin Regulator Pin Regulator Pin HVDD T-CON [1] 0V [1] 0V (Gnd) [1] 5V [1] 0V (Gnd) [1] 0V (Gnd) [1] 0V (Gnd) [2...
Page 73 - 7LE8500 Main (Back Side) Component Voltages
47LE8500 Main (Back Side) Component Voltages IC602 D1.8V IC8400 RGB IC8700 Wireless Q200 (1.8V_HDMI) Q8203 IR Wireless Pass Pin Regulator Pin H/V Sync Pin Buffer Pin Switch Pin 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 [2] 3.3V (...
Page 74 - Runs when
July 2010 LCD TV 47LE8500 74 Main Board X9001 and X9000 Crystal Checks Main Board X9001 and X9000 Crystal Checks 25Mhz MAIN Board 1.58V 1.6V X9001 3.19V p/p 4.86V p/p IC9001 T-CON Crystal 1.56V 1.6V X9000 2.54V p/p 3.27V p/p IC9301 TruMotion / Dimming Crystal 12Mhz X9001 X9000 Runs when set is On Ru...
Page 75 - MAIN Board; Either leg; Runs all
July 2010 LCD TV 47LE8500 75 Main Board X8100 and X1001 Crystal Checks Main Board X8100 and X1001 Crystal Checks 10Mhz MAIN Board 1.95V 1.52 X8100 3.13V p/p 2.26V p/p IC900 BCM Crystal 1.52V 1.3V X1001 781mV p/p 789mV p/p IC8100 Micro Crystal 54Mhz X8100 X1001 X8101 1.75V 1.5V 1.85V p/p 2.82V p/p Ei...
Page 77 - Location: Top Left of Board
July 2010 LCD TV 47LE8500 77 Main Board Additional Panel Voltage Checks Main Board Additional Panel Voltage Checks -4.8V (VDD-ODD) Location: Top Left of Board From IC9101 Pin 21 P7500 P7501 -4.8V (VDD-EVEN) -4.7V (VST) IC9101 Back Side of Board From IC9101 Pin 20 From IC9101 Pin 19 Leandro Palmeira ...
Page 78 - PDIM Pin 20 can vary according to incoming video IRE level,; Odd Pins Front Row
July 2010 LCD TV 47LE8500 78 Main Board Connector P8000 to Power Supply Voltage and Diode Che Main Board Connector P8000 to Power Supply Voltage and Diode Che ck ck Diode Mode values taken with all Connectors Removed (1) PDIM Pin 20 can vary according to incoming video IRE level, OSD Backlight setti...
Page 83 - Open
July 2010 LCD TV 47LE8500 83 Main Board Connector P8800 to Speakers Voltage and Diode Check Main Board Connector P8800 to Speakers Voltage and Diode Check Diode Mode values taken with all Connectors Removed P8800 CONNECTOR "Main" to "Speakers" SPK-L(+) SPK-L(-) SPK-R(+) SPK-R(-) LABE...
Page 88 - Speaker
July 2010 LCD TV 47LE8500 88 INVISIBLE SPEAKER SECTION INVISIBLE SPEAKER SECTION The 47LE8500 contains the Invisible Speaker system. The Full Range Speakers point downward, so there is no front viewable speaker grill or air ports. Speaker p/n EAB60961501 Installed Top View Side View Front View Leand...
Page 90 - Front IR
Q? L8804 L8805 P8800 P8200 Q8200 Q8201 D8306 Q8300 Q8303 Q8301 Q8304 D8307 IC8400 Q8302 Q8305 D8309 Q8700 IC 870 0 Q8701 Q8205 Q8203 47LE8500 INTERCONNECT DIAGRAM Intelligent Sensor Intelligent Sensor Stand-by P8200 "MAIN Board" To CON1 "IR Board" Indicates Hot Ground SMPS TEST 1 P 2...
Page 93 - This concludes the
47LE8500 47LE8500 Conclusion Conclusion Page Page This concludes the 47LE8500 training session. Direct View LCD Direct View LCD Leandro Palmeira Downloaded From TV-Manual.com Manuals
