LG 42LV5500 Training Presentation Download Page 32

Page: 32 / 88

Removing the Back Cover

Remove the 29 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 AC Cord

unplugs under

cover. Remove

plastic cover.

May 2011 LCD TV 42LV5500

The Stand has to be removed before removing the back.

Summary of Contents for 42LV5500

Page 1: ...42LV5500 1080P Direct View LCD 42LV5500 LED Backlights Training LCD DV Troubleshooting 42 Class 1080P 120Hz LED TV SmartTV 42 diagonally Published May 12th 201 1 ...

Page 2: ...Instructions and Voltages Troubleshooting Section Board Operation Troubleshooting of Signal Distribution Disassembly Instructions and Voltages Disassembly Section Removal of Circuit Boards Switch Mode Power Supply with LED Backlight Driver Main Board Front IR Intelligent Soft Touch Key Board T CON TFT Panel Driver Board g y Speaker May 201 1 LCD TV 42LV5500 2 ...

Page 3: ...hniques which can save time and money sometimes can be overlooked These techniques will also be presented Thi S ti ill t th T h i i f ili ith th Di bl Id tifi ti d This Section will get the Technician familiar with the Disassembly Identification and Layout of the LCD Display Panel f S f C At the end of this Section the Technician should be able to Identify the Circuit Boards and have the ability a...

Page 4: ...rized modifications will not only void the warranty but may lead to property damage or user injury If wires screws clips straps nuts or washers used to complete a ground path are removed for user injury If wires screws clips straps nuts or washers used to complete a ground path are removed for service they must be returned to their original positions and properly fastened CAUTION CAUTION CAUTION C...

Page 5: ...to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful g p p g interference when the equipment is operated in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause ...

Page 6: ...0 Models Wireless Ready Software Downloads LG CS Learning Academy http ln lge com ilearn http 136 166 4 200 Training Manuals Schematics with Navigational Bookmarks Start Up Sequence Owner s Guides Interconnect Diagrams Dimensions Connector IDs Product Pictures and Features Also available on the Plasma Page PDP Panel Alignment Handbook Plasma Control Board ROM Update Jig required e co ec ag a s e s...

Page 7: ...and waveform checks to prevent costly short circuits from damaging the unit 5 Be cautious of lost screws and other metal objects to prevent a possible short in the 5 e cau ous o os sc e s a d o e e a objec s o p e e a poss b e s o e circuitry Checking Points to be Considered 1 Check the appearance of the Replacement Panel and Circuit Boards for both physical damage and part number accuracy 2 Check...

Page 8: ...enses the first check should always be the DC Supply Voltages to those circuits under test Always confirm the supplies are not only the proper level but be sure they are noise free If the supplies are missing check the resistance for possible short circuits Isolate To further isolate the failure check for the proper waveforms with the Oscilloscope to make a final determination of the failure Look ...

Page 9: ...42LV5500 PRODUCT INFORMATION SECTION This section of the manual will discuss the specifications of the 42LV5500 May 201 1 LCD TV 42LV5500 9 LCD Direct View Display ...

Page 10: ...1 HDMI Cable from the Dongle to the TV to transfer Audio and Video Signals 2 Wired Remote cable between the TV and Dongle for Control Functions Media Box 2 Wired Remote cable between the TV and Dongle for Control Functions Wired Remote to control the Media Box Wi l R i T itt TV A V Inputs Wireless Receiver Transmitter Dongle Attaches via Velcro to the back of the set HDMI May 201 1 LCD TV 42LV5500...

Page 11: ...allows the TV to connect to a wireless LAN network The Wireless Network adaptor attaches to the Television via either of the two USB connections Allows access to DLNA Digital Living Network Alliance AP Wireless Router Wireless Adaptor Side A V Cat 5 Cable with RJ 45 Connectors Dongle Side A V Inputs on each side May 201 1 LCD TV 42LV5500 1 1 Modem ...

Page 12: ... 1080p Resolution Smart Energy Saving ISFccc Ready 1 Internet connection subscriptions required and sold separately The Magic Motion Remote does not come equipped with all LG Smart TV enabled TVs and a separate purchase maybe required The Hulu Plus service is projected to be available via a firmware update in June 2011 The LG web browser does not support Flash 10 or May 201 1 LCD TV 42LV5500 12 HT...

Page 13: ...Hz See sports video games and high speed action with virtually no motion blur and in crystal clarity with LG s TruMotion 120Hz technology Now your TV k ith th f t t i can keep up with the fastest moving scenes Magic Motion Remote Included Just point and choose selections with LG s unique motion controlled Magic Remote Remote DLNA Certified To build a digital network you need digital devices That s...

Page 14: ... existing wireless broadband setting it up is simple and you don t need to worry about g p p y y messy wires Intelligent Sensor The Intelligent sensor will monitor the room lighting environment When Picture Wizard G t lf lib ti ith f i t f k i t the room lights go out the TV will automatically adjust the picture for the best viewing enjoyment Get easy self calibration with on screen reference poin...

Page 15: ...se functions while providing the f t th i l ffi i t d l L same performance at the same price as less efficient models Less energy means you pay less on your energy bill Draws less than 1 Watt in stand by 5M 1 D i C t t R ti 5M 1 Dynamic Contrast Ratio Worrying about dark scenes is a thing of the past The mega contrast ratio of 5 000 000 1 delivers vivid colors and deep blacks AV Mode One click Cin...

Page 16: ...TOP PORTION BOTTOM PORTION p n AKB72914042 42LV5500 Remote Control May 201 1 LCD TV 42LV5500 16 ...

Page 17: ...nd Photos Also for the Wireless Network adaptor Rear In Out Jacks Side In Out p USB 2 Wireless Media Box Remote Jack HDMI 4 USB 1 AV Component AV Component In HDMI 3 HDMI 4 HDMI 1 Antenna In AV Component In RS232 In HDMI 2 RGB LAN Optical Head RGB May 201 1 LCD TV 42LV5500 17 Optical Out Head Phones Audio ...

Page 18: ... to highlight the mark SUPPORT Bring up the Customer s Menu then cursor down 2 times Input will be highlighted Cursor right to highlight SETUP Cursor right to highlight Software Update Press ENTER on Remote Press ENTER on the Remote Remote Highlight Check Update Version g g p to see if an update is available Scroll up to highlight ON and cursor right to turn off automatic Software Update May 201 1...

Page 19: ... Version found on the USB Flash Drive File found on the USB Fl h D i See figure to right 5 Cursor left and highlight START Button and push Enter button using the remote control 6 You can see the download progress Bar 7 D t l til it h t ti ll CAUTION Do not remove AC power or th USB Fl h D i D t Flash Drive 7 Do not unplug until unit has automatically restarted 8 When download is completed you will...

Page 20: ...y 7 times to bring up the first screen for Manual Download Screen Expert Mode Press the FAV key 7 times Location of files found On the Jump Highlight the Software update file the Scroll down and highlight Options Drive highlight Start and press SELECT to begin the download process WARNING Use extreme Caution when using the Manual Forced Download Menu Any file can be d l d d h l t d d th M i b d t ...

Page 21: ...hlight the mark SUPPORT Cursor right and scroll down to highlight cursor down 2 times Input will be highlighted Cursor right to highlight SETUP Press ENTER on the Remote highlight Product Service Info Press ENTER on Remote 3 Information for Customer Support appears Note Model Number does not include suffix May 201 1 LCD TV 42LV5500 21 ...

Page 22: ...tigate the signal quality of a problem channel 2 Bring up the Customer s Menu Cursor down two times and right once to highlight Setup Press Enter on the remote g may be showing problems 5 Press the 1 Key 5 to 8 times The Host Diagnostics screen appears The Host Diagnostics screen appears 3 The Setup Menu appears May 201 1 LCD TV 42LV5500 22 See next page for more details ...

Page 23: ...ay FLASH 524288 KB DRAM 524288 KB NVM 128 KB Firmware Version MP 3 01 15 01 31010 Micom Version V3 21 6 Compile Date Time 20110127 08 45 52 Compile User tu ryu Center Frequency 663 00 MHz PCR lock Locked Modulation mode QAM 256 Carrier lock status Locked SNR 37 dB Signal level 100 Half Page Move Page Exit CH 23 42LV5500 Understanding the Host Diagnostic Screen Page 2 of 2 DVI HDMI Status Can t dis...

Page 24: ... either Service Remote p n 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 May 201 1 LCD TV 42LV5500 24 MKJ39170828 105 201M ...

Page 25: ... 00 00 00 MAC Address E8 5B 5B 24 67 C9 Widevine LGTV11L000012362 ESN Num LGE LV5500XXXX000A0C9037 RF Receiver Version Debug Status UTT 12 APP History Ver 31010 PQL DB LGD_EF_SANYO_XXXXXX 1 Adjust Check 2 ADC Data 3 Power Off Status 4 System 1 5 System 2 6 Model Number D L 7 Test Option 8 External ADC 9 Spread Spectrum 10 Sync Level 11 Wireless Ready 12 Stable Count 13 ODC Test 14 Local Dimming 15...

Page 26: ...imming 15 SDP Server Selection 16 Network Error History 03 01 15 01 3 21 6 1 02 51 N A a2 4 0 03 0 02 BCM 35230 0 00 0 0 00 0 1 0 0 VB091 RELEASE 26 May 2011 LCD DV 42LV5500 42LV5500 Model Number Download Screen 0 Model Name 1 Serial Num Model Number D L Press OK to Save 42LV5500 UA Bring up the Service Menu using the Service Remote Scroll down to item 6 Model Number D L to highlight Press ENTER o...

Page 27: ...til the Service Menu is exited Model Name 42LV5500 UA Serial Number 101RMSS6B702 S W Version MICOM Version BOOT Version FRC Version IR LED Version EDID RGB HDMI Chip Type Wireless Host Ver Wireless B B Ver Vi Fi Version Vi Fi Channel Wi Fi MAC 00 00 00 00 00 00 MAC Address E8 5B 5B 24 67 C9 Widevine LGTV11L000012362 ESN Num LGE LV5500XXXX000A0C9037 RF Receiver Version Debug Status UTT 12 APP Histo...

Page 28: ...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 May 201 1 LCD TV 42LV5500 28 ...

Page 29: ...ss Select key Downloading in progress When PCM EDID D L was selected When AC3 EDID D L was selected Note When PCM is downloaded AC3 will be N G and when AC3 is downloaded PCM will be N G Thi th t h PCM i OK PCM di i i it d h AC3 i OK AC3 di i May 201 1 LCD TV 42LV5500 29 This means that when PCM is OK PCM audio is priority and when AC3 is OK AC3 audio is priority ...

Page 30: ...83 26mm 1 1 2 38 1mm 10 254mm 15 3 4 400mm 3 3 4 96mm 11 5 16 288mm 2 5 8 66 04mm Center There must be at least 4 inches of Clearance on all sides 30 12 1 16 306mm 12 1 8 308 61mm Model No Serial No Side Label Wattage Typical 125W Full White 155W Stand By 0 1W 19 7 8 505 46mm Center Remove 4 screws to remove stand for wall mount May 2011 LCD DV 42LV5500 ...

Page 31: ...f the 42LV5500 LCD Direct View Television Upon completion of this section the Technician will have a better 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 May 201 1 LCD TV 42LV5500 31 ...

Page 32: ...ion to the size and type of screw as there are many different types Putting in an improper screw when reassembling may Cause damage The AC Cord unplugs under cover Remove plastic cover May 201 1 LCD TV 42LV5500 32 The Stand has to be removed before removing the back ...

Page 33: ...d Layout Warning The Frame may have sharp edges To LEDs Power Supply SMPS Main Board LVDS Cables Panel Connection T CON a e Co ect o Points May 201 1 LCD TV 42LV5500 33 Invisible Speaker Right IR LED and SOFT TOUCH KEY Board Invisible Speaker Left Motion Remote ...

Page 34: ...p n EBR72671001 p n EAJ61749101 p n EAB62088401 p n EAB62088401 p n EAY62169801 P601 n c SK100 P1601 To TFT Panel If the Panel is replaced reset the UTTTime Service Menu System 1 Item 12 To LEDs White Plug Black Plug P203 P202 P701 n c P832 P201 P502 P1502 CN2 CN1 CN5 CN4 T CON P1501 P901 P1302 Motion Remote Receiver p n EBR72499601 MAIN BOARD P102 n c P1702 Comes with the Panel P101 n c ...

Page 35: ...ss in gently on the two tabs P201 tabs to release lock Remove the 6 screws indicated by the arrows by the arrows SK100 AC In Note This screw Is a different size May 201 1 LCD TV 42LV5500 35 SK100 fits very snug into it s connector Press in on the two tabs to release lock Is a different size with washer ...

Page 36: ...ress in on the side release tabs to remove Screw removed with Back indicated by the arrows N C releasing tabs pull the LVDS ribbons out P1501 Decorative Metal Plate Remove the board Screw N C P901 After removing the Main there are tabs sticking through the Main board holding the Metal plate in place Screw removed with Back Remove the board Then Remove the wrap around P1302 decorative Metal piece N...

Page 37: ...eld Remove the T CON Shield 3 Screws Press in on the Press in on the two side unlocking tabs Return Screws if t ti b d CN2 CN1 Disconnect CN1 CN2 CN4 and CN5 See next page for removing Connectors testing board CN5 CN4 Return Screws if testing board Flip up the unlocking tabs Flip up the May 201 1 LCD TV 42LV5500 37 p p unlocking tabs ...

Page 38: ...abs and slowly rock the cable out of the connector Shown by the arrows in Figure above Press In Pull Out Press In Pull Out Press In From the Main Top of the board Removing LVDS CN2 LVDS CN1 LVDS CN5 CN4 To the Panel Bottom of the board Removing Ribbons Flip the locking tabs upward and pull May 201 1 LCD TV 42LV5500 38 out the ribbon cables ...

Page 39: ... and remove the wire routing bracket Item 511 on the parts breakdown Wire routing b k t Slid Ri ht Tab bracket Slide Right Ali After gaining access to the Front IR Intelligent Sensor Align After gaining access to the Front IR Intelligent Sensor Board lay the TV down on its face and remove the LCD Panel by removing the screws around the perimeter of the panel Lift the Panel up and out The Front Fra...

Page 40: ...ion of the manual will discuss troubleshooting Upon completion of this section the Technician will have Upon completion of this section the Technician will have a better understanding of how to diagnosis and resolve problems May 201 1 LCD TV 42LV5500 40 ...

Page 41: ...1 it turns on the Relay RL101 which supplies AC to the bridge rectifier BD101 The i ti P F t C t ll i it i it t l i bilit primary section Power Factor Controller circuit increases its current supplying ability Both Primary fuses F101 and F501 now read a little more than 396V D253 receiving switching pulses from L601 develops the 45V for the LED backlights When the SMPS receives the DRV_ON command ...

Page 42: ...n the 45V supply but it will only be 36V Note A block of LEDs can not be turned on with this voltage It will increase to 65V then drops to 45V in less that 20 seconds when the DRV ON line goes high Pin Label STBY Run Diode 24 ERROR n c n c 2 03V 23 n c n c n c OL 22 PWM 0V OL 21 12V 0V 12V 0 48V 20 n c n c n c OL 19 12V 0V 12V 0 48V 18 DRV ON 0V 3 26V OL 17 12V 0V 12V 0 48V 16 V_Sync n c n c n c O...

Page 43: ...rter On P1501 Reset Generator C608 R644 1 AC In 3 5V_ST P DIM1 8 4 P1502 Panel VCC 12V 5 7 Key 1 or IR 7 Video Processor IC101 SCLK MOSI CLK VS 16 Blocks 9 POWER SUPPLY SMPS POWER SUPPLY SMPS Bridge Relays L601 D253 6 5 12V 24V Regulators On Board Inverter 8 6 Local and Global Dimming Local and Global Dimming 5 P DIM1 PWM DIM Pulse Width Dimming Global Dimming Manipulated by Cust Menu for Backligh...

Page 44: ... 5V_ST INV_ON PWR_ON IC602 Micro RL_ON Power Det 14 Reset 40 Key 1 25 Key 2 26 Power On Off 2_2 20 R508 4 7K 3 55V 3 55V 3 55V Q505 0V 36 R542 10KΩ 3 3V_Normal Reset Gnd 13 13 16 16 n c 23 23 n c n c Q501 R547 10K R644 47K C608 0 1uF IC101 BCM R228 22Ω R526 0Ω R643 22Ω IR 16 R605 100Ω R553 47K R559 1 8K To DC to DC Conv T CON 12V L507 IC505 Power_On Off2_2 R546 1K 0 68V R555 22KΩ 11 97V 11 94V 11 ...

Page 45: ...ue with the next test But make sure AC is arriving at the connector SK101 b Unplug P502 on the Main Board to make insertion of the Jumpers easier Use P502 Side to insert resistors TEST 1 Pin 1 is the Brown Wire 1 Add a jumper between 3 5V STBY pin 7 8 9 or 10 and Pin 1 PWR_ON Apply AC This will turn on the power supply relay will click a Check that the 24V 24 41V and 12V power supplies are turned ...

Page 46: ...nverter OK Backlights Abnormal a Recheck all connections a Recheck all connections b Confirm the DRV_ON line pulling up to at least 3V c Check the connections to the Panel If the DRV On command is pulling up to 3V and the 45V is being generated _ p g p g g from C256 leg see the Inverter Section of the Power Supply for additional checks Note If either P202 or P203 is disconnected the backlights wil...

Page 47: ...C 4A EL74 Rivet P202 pin 7 Block VC 4B EL75 Rivet P202 pin 8 Block VC 4C EL76 Rivet P202 pin 9 Block VC 4D EL77 Rivet P202 pin 10 45V P202 pin 1 and 12 B 8 blocks 45V P203 pin 1 and 13 B 8 blocks 112 Total LEDs 2 Boards Strips 56 LEDs per board ONE STRIP Board 1 Block 45V 12V p p LED Drive Signal 50 IRE 2mSec Driver On SMPS 6 1V drop per LED max white Global And Local Dimming Control P202 or P203 ...

Page 48: ...ed at the side of C256 or C257 or the Cathode of D253 Note When the PWR ON command 45V Note When the PWR_ON command Arrives this voltage will read 36V When the DRV_ON command arrives This voltage will rise to 65V the fall quickly 45V 45V D253 Down to 45V Location Top Center of the SMPS May 201 1 LCD TV 42LV5500 48 ...

Page 49: ... EL62 EL66 EL64 EL62 EL76 EL74 EL72 3 VC 3A EL70 4 VC 3B EL71 5 VC 3C EL72 6 VC 3D EL73 3 VC 1A EL62 4 VC 1B EL63 5 VC 1C EL64 6 VC 1D EL65 EL68 EL67 EL65 EL63 EL77 EL75 EL73 EL71 EL69 7 VC 4A EL74 8 VC 4B EL75 9 VC 4C EL76 10 VC 4D EL77 7 n c n a 8 VC 2A EL66 9 VC 2B EL67 10 VC 2C EL68 EL70 11 n c n c 12 LED C256 11 VC 2D EL69 12 n c n a 13 LED C256 P832 May 201 1 LCD TV 42LV5500 49 ...

Page 50: ...V 10 4V OL 4 VC 1B EL63 1 2V 10 4V OL 5 VC 1C EL64 1 2V 10 4V OL 6 VC 1D EL65 1 2V 10 4V OL 7 n c n a n c OL 8 VC 2A EL66 1 2V 10 4V OL 8 VC 4B EL75 1 2V 10 4V OL 9 VC 4C EL76 1 2V 10 4V OL 10 VC 4D EL77 1 2V 10 4V OL 11 n c n c n c OL 8 VC 2A EL66 1 2V 10 4V OL 9 VC 2B EL67 1 2V 10 4V OL 10 VC 2C EL68 1 2V 10 4V OL 11 VC 2D EL69 1 2V 10 4V OL 12 OL P203 P202 1 1 12 LED C256 45V OL White to Black ...

Page 51: ...500uSec div Bottom Waveforms are 100uSec div Pin Label 1 VSYNC 2 SDA 3 SCL 4 SIN 5 Gnd 6 L DIM0_SCLK 7 n c 8 Reverse P832 Pin 2 SDA 3 3V p p P832 Pin 3 SCL 3 2V p p 2mSec div 2mSec div P832 Pin 1 VSYNC 3 5V p p P832 Pin 4 SIN 3 35V p p P832 Pin 6 SCLK 3 3V p p May 201 1 LCD TV 42LV5500 51 ...

Page 52: ... Label STBY Run Diode Check 8 Reverse Gnd Gnd 1 91V 7 n c n c n c OL 6 L DIM0_SCLK 0V 0 1V OL 5 Gnd Gnd Gnd Gnd 4 SIN 0V 0 18V OL 3 SCL 0V 3 25V OL 3 SCL 0V 3 25V OL 2 SDA 0V 3 25V OL 1 VSYNC 0V 0V OL May 201 1 LCD TV 42LV5500 52 Diode Mode values taken with all Connectors Removed ...

Page 53: ...3 26V OL 17 12V 0V 12V 0 48V 1 17 12V 0V 12V 0 48V 16 V SYNC n c n c n c 13 15 Gnd Gnd Gnd Gnd 9 12 3 5V 3 55V 3 53V 2 63V 5 8 G d G d G d G d 1 PDIM1 Pin 22 can vary according to incoming video IRE level OSD Backlight setting and then Intelligent Sensor 5 8 Gnd Gnd Gnd Gnd 2 4 24V 0V 24 5V 1 09V 1 PWR ON 0V 2 62V 1 15V g g g room light condition Output from the Video Processor IC900 Range 0 37V t...

Page 54: ...OL AC Voltage Readings From Hot Ground F100 5A 250V AC Voltage Readings From Hot Ground Pins 1 and 2 for STBY and RUN F100 AC IN Diode Mode values taken with all Connectors Removed F100 Diode Check F100 Diode Check Red or Black Lead on Fuse Open Other Lead on Hot Ground L N Bottom Left of SMPS May 201 1 LCD TV 42LV5500 54 SK100 ...

Page 55: ...d F501 F501 Power Supply Voltage Checks Power Supply Voltage Checks F101 3 15A 250V F501 1 6A 250V From Hot Gnd STBY 399V Run 398 5V From Hot Gnd STBY 397V Run 396 5V Run 398 5V Run 396 5V May 201 1 LCD TV 42LV5500 55 ...

Page 56: ...d STAND BY VOLTAGES 3 3V_ST Direct from SMPS through L503 GENERAL 5V_Normal IC507 Made from 12V In 3 3V_Normal IC505 Made from 12V In 5V USB IC506 Made from 12V In Panel_VCC 12V Not generated but switched by Q507 from the 12V arriving from the SMPS TUNER TU2101 and VSB CIRCUIT 5V_TU Made from 5V_Normal through L2101 4 3 3V_TU Made from 3 3V_Normal L2103 1 26V TU IC2103 M d f 3 3V TU BCM IC101 Vide...

Page 57: ...IC102 NAND FLASH P1502 To T CON See next page for component IC101 BCM USB 2 FLASH P601 n c P1501 To T CON HDMI 4 Wireless Remote component identification P901 To Ft IR Component 1 HDMI 2 HDMI 3 RS232 n c C LAN HDMI 1 P1302 To Motion Remote Composite 1 Tuner TU2101 Headphones May 201 1 LCD TV 42LV5500 57 Component In These connectors are Mini plug type LAN RGB RGB Audio Optical RF Component 2 Compo...

Page 58: ...er Det 24V Power Det 12V INV_CTL Driver Wireless Dongle Switch Pin Label STBY Run Diode Check 24 ERROR n c n c OL 23 n c n c n c OL 22 1 PWM 0V 2 35V 21 12V 0V 12V 2 07V 20 n c n c n c OL 19 12V 0V 12V 2 07V 18 DRV ON 0V 3 26V 1 53V 17 12V 0V 12V 2 07V 16 V_Sync 0V 0V OL 13 15 Gnd Gnd Gnd Gnd 9 12 3 5V 3 55V 3 53V 1 15V 5 8 Gnd Gnd Gnd Gnd 2 4 24V 0V 24 5V OL 1 PWR ON 0V 3 41V 2 89V P201 SMPS Boar...

Page 59: ...Q1002 BCM IC101 IC102 IC804 IC401 IC402 IC1702 L505 Q503 Q508 IC501 IC507 IC506 IC505 IC1203 IC103 IC1204 IC701 1 2 3 2 IC2103 P101 N C P102 N C P1601 Q501 Q502 E B C E B C L1704 L1707 L1708 L1703 X602 IC801 12 2V Each Pin MAIN BOARD p n EBR71850702 p n EBR73146501 p n EBR71850705 1 18 18 IF p 17 IF n 16 IF AGC 15 Reset 14 3 3V 13 1 26V 12 GND 11 CVBS 10 NC 9 SIF 8 NC 7 SDA 6 SCL 5 NC 4 NC 3 5V 2 ...

Page 60: ...6V 7 4 96V Out 1 0V Gnd IC1203 EDID Data Pin Switch 8 5 81V 8 4 96V Out 2 0V Gnd Pin PC 1 0 95V 9 0 95V 3 0V Gnd 1 0V Gnd 2 0 95V 10 1 36V IC508 1 5V_DDR 4 0V Gnd 2 4 96V Vcc In 3 0 95V Pin Regulator 5 4 73V 3 4 96V Vcc In 4 1 36V IC504 2 5V BCM 1 3 46V 6 4 73V 4 3 34V USB Ctl2 5 11 96V Pin Regulator 2 n c 7 4 73V 5 3 17V 6 11 96V 1 n c 3 3 46V In 8 4 73V Vcc In 6 4 96V Out 7 11 96V 2 4 92V En 4 3...

Page 61: ... MAIN BOARD p n EBR71850702 p n EBR73146501 p n EBR71850705 E B C Q906 S G D Q507 E B C Q506 E B C Q505 D810 C A1 A2 E B C E B C Q2105 C A1 A2 D707 D710 C A1 A2 C A1 A2 D708 D711 C A1 A2 C A1 A2 D713 Q102 G S B D G S B D G S B D Q101 E B C Q801 TU2101 TUNER Q710 Q2104 1 18 3 1 2 IC502 3 1 2 IC503 E B C Q504 CEC RGB_DDC_SDA RGB_DDC_SCL EEPROM Power Det 24V Power Det 12V INV_CTL Driver Panel Vcc Swi...

Page 62: ...in 19 IC1702 1 0V Gnd Pin Control 1st Driver Pin 2nd Driver B 0V 2 0V Gnd B 0V B 0 02V C 3 36V 3 3 49V C 0 68V C 3 48V E Gnd 4 0V Gnd E Gnd E Gnd 5 3 49V 6 3 49V Q506 PANEL_VCC D707 5V Pull Up to 7 0V Gnd Pin Control 2nd Driver Q906 IR Wireless Pass Pin DDC_SCL SDA_1 8 3 50V Vcc In B 0 67V Pin 1st Driver A1 4 96V C 0V B 0 57V C 5V Q101 RGB_DDC_SDA E Gnd C 0V A2 0V Pin FET Buffer E Gnd B 0V Gnd Q50...

Page 63: ...l Checks X601 IC601 Micro Crystal X602 1 57V 2 31V p p 1 18V No Signal Either leg Runs all 32 768KHz 2V 3 3V p p 2 09V 3 51V p p Bottom leg The time 10Mhz Bottom leg Runs all The time MAIN Board X601 X602 May 201 1 LCD TV 42LV5500 63 ...

Page 64: ...l Audio B 12 2V on each pin IC1702 VOLTAGES 3 3V_AU_AVDD pin 13 3 3V_DVDD pin 27 All made from 3 3V Normal IC1702 _ Right Channel 24V pin 34 35 R 24V pin 40 41 R R R 1 Left Channel 24V pin 44 45 L 24V pin 2 3 L L L Q1701 Back side of the board is Mute Active Low 3 3V_ST Collector to AMP_MUTE_PDN Pin 19 Amp _Reset pin 25 May 201 1 LCD TV 42LV5500 64 ...

Page 65: ...r Main To Speakers P1702 P1702 Connector Main To Speakers Pin Label SBY Run Diode Check 1 SPK R 0V 12 2V Open 2 SPK R 0V 12 2V O R R 2 SPK R 0V 12 2V Open 3 SPK L 0V 12 2V Open 4 SPK L 0V 12 2V Open R L L May 201 1 LCD TV 42LV5500 65 Diode Mode values taken with all Connectors Removed ...

Page 66: ...nd Gnd Gnd 16 GND VSYNC n c n c OL 17 12V 0V 12V 2 07V 18 INV ON 0V 3 26V 1 53V 19 12V 0V 12V 2 07V 20 A DIM n c n c OL 21 12V 0V 12V 2 07V Odd Pins Top Row 0 0 22 PDIM 1 0V 0 2V 3 3V 2 35V 23 n c n c n c OL 24 Err OUT n c n c OL 1 PDIM Pin 22 can vary according to incoming video IRE level OSD Backlight setting and Intelligent Sensor room light condition Range 0 2V to 3 3V P DIM1 May 201 1 LCD TV ...

Page 67: ...T_SEL 2 37V OL 47 n c n c n c 8 n c n c n c 28 TXB0N 1 24V 0 94V 48 Panel_VCC 11 9V 0 89V 9 n c n c n c 29 TXB0P 1 14V 0 94V 49 Panel_VCC 11 9V 0 89V 10 PANEL_CTL 0V OL 30 TXB1N 1 27V 0 94V 50 Panel_VCC 11 9V 0 89V 11 Gnd Gnd Gnd 31 TXB1P 1 14V 0 94V 51 Panel_VCC 11 9V 0 89V 12 TXA0N 1 26V 0 94V 32 TXB2N 1 31V 0 94V P1501 13 TXA0P 1 15V 0 94V 33 TXB2P 1 10V 0 94V 14 TXA1N 1 26V 0 94V 34 Gnd Gnd Gn...

Page 68: ...V 9 Gnd Gnd Gnd 29 TXD1P 1 12V 0 94V 10 TXC0N 1 25V 0 94V 30 TXD2N 1 32V 0 94V 11 TXC0P 1 15V 0 94V 31 TXD2P 1 07V 0 94V 12 TXC1N 1 26V 0 94V 32 Gnd Gnd Gnd Th St d B 13 TXC1P 1 13V 0 94V 33 TXDCLKN 1 17V 0 94V 14 TXC2N 1 29V 0 94V 34 TXDCLKP 1 23V 0 94V 15 TXC2P 1 11V 0 94V 35 Gnd Gnd Gnd 16 Gnd Gnd Gnd 36 TXD3N 1 31V 0 94V There are no Stand By Voltages for the Connector Diode Mode values taken ...

Page 69: ...d Gnd 7 Gnd Gnd Gnd Gnd 8 LED_B BUZZ 0V 0V OL 9 2 IR 1 48V 1 45V OL 10 Gnd Gnd Gnd Gnd 1 11 3 3V_Normal 0 35V 3 34V 0 53V 12 LED_R BUZZ 0V 0V 2 67V 13 Gnd Gnd Gnd Gnd 14 3 S T SCL 3 55V 3 49V 1 86V 1 Clock Data pulses only present when Intelligent Sensor is turned on 3 6V p p 2 IR pulses 2V p p 14 3 S T_SCL 3 55V 3 49V 1 86V 15 3 S T_SDA 3 55V 3 49V 1 86V May 201 1 LCD TV 42LV5500 69 Diode Mode va...

Page 70: ...35V 3 34V 0 53V 2 Gnd Gnd Gnd Gnd 2 Gnd Gnd Gnd Gnd 3 M_Remote_RX 0 35V 3 33V OL 4 M_Remote_TX 0 35V 3 33V OL 5 R t 0 35V 3 33V 2 41V 5 Reset 0 35V 3 33V 2 41V 6 DC_MRemote 0 35V 3 33V 2 38V 7 DD_MRemote 0 35V 3 33V Gnd 1 8 Gnd Gnd Gnd Gnd 9 GPI0 O 0V 0V OL 10 GPI0 1 0V 0V OL 11 GPI0 2 0V 0V OL 12 GPI0 3 0V 0V OL May 201 1 LCD TV 42LV5500 70 Diode Mode values taken with all Connectors Removed ...

Page 71: ...Jack _ 13 I2C_SDA 0V 3 3V 1 02V 14 Gnd 0V Gnd Gnd 15 Wireless_RX 0V 3 3V 1 17V 16 Wi l TX 0V 3 3V 1 22V Diode Mode values taken with all Connectors Removed 16 Wireless_TX 0V 3 3V 1 22V 17 Gnd 0V Gnd Gnd 18 IR 0 67V 3 3V 1 37V 19 20 Gnd 0V Gnd Gnd 1 Voltages with Wireless Media Box Dongle plugged in Use Media Box Dongle side to read voltages Remove cover see Wireless Media Box training manual for d...

Page 72: ...TFT D i Si l It d li it t t Board at CN1 and CN2 which it processes into TFT Drive Signals It delivers its output signals through connectors CN4 and CN5 to control the LCD Panel US1 U3 and U6 are DC to DC converters which develops the Panels driver voltages 16 74V 3 3V 5V d 28V Th lt b d t th ibb t t t t 16 74V 3 3V 5V and 28V These voltages can be read at the ribbon connector or at test locations...

Page 73: ... two screws shown in the picture are for the Service Position They would have been removed when removing the shield B t i t ll th if i i th T CON b d CN4 CN5 May 201 1 LCD TV 42LV5500 73 Be sure to reinstall them if servicing the T CON board ...

Page 74: ...48 VGL_I 5V Pin 47 VST Pin 40 41 P VDD May 2011 LCD DV 42LV5500 74 4 3 31V 3 3 3V 2 2 95V 1 3 3V 16 74V 16 74V HVDD U6 U3 VGHR VGHF VGHODD VGHEVEN VGLI VST VGL_I 5V 3 3V Pin 35 VCC 3 3V Pin 25 VCC D7 1 2 V PANEL TEST To run the T CON Panel Test remove the LVDS cables Jump 12V to the 12V fuse Jump VCC 3 3V to pin 44 on CN1 White Red Blue Green and Black patterns show on screen Panel Test TP 44 Pin ...

Page 75: ... Test 2 Shown on page 46 Do not apply AC at this time Jump 12V from the SMPS to the T CON Fuse F1 P201 pin 17 or 19 or 21 Disconnect both LVDS Cables LVDS Cables Jump 3 3V from the VCC TP to pin 44 of CN1 May 201 1 LCD TV 42LV5500 75 Apply AC to the Power Supply and Toggling patterns of White Red Blue Green should appear on the screen ...

Page 76: ..._SEL 2 37V OL 47 n c n c n c 8 n c n c n c 28 TXB0N 1 24V OL 48 Panel_VCC 11 9V OL 9 n c n c n c 29 TXB0P 1 14V OL 49 Panel_VCC 11 9V OL _ 10 PANEL_CTL 0V OL 30 TXB1N 1 27V OL 50 Panel_VCC 11 9V OL 11 Gnd Gnd Gnd 31 TXB1P 1 14V OL 51 Panel_VCC 11 9V OL 12 TXA0N 1 26V OL 32 TXB2N 1 31V OL 13 TXA0P 1 15V OL 33 TXB2P 1 10V OL Bold labels are video signals 14 TXA1N 1 26V OL 34 Gnd Gnd Gnd 15 TXA1P 1 1...

Page 77: ...27 TXD0P 1 15V OL 8 n c n c n c 28 TXD1N 1 27V OL 1 9 Gnd Gnd Gnd 29 TXD1P 1 12V OL 10 TXC0N 1 25V OL 30 TXD2N 1 32V OL 11 TXC0P 1 15V OL 31 TXD2P 1 07V OL 12 TXC1N 1 26V OL 32 Gnd Gnd Gnd Bold 13 TXC1P 1 13V OL 33 TXDCLKN 1 17V OL 14 TXC2N 1 29V OL 34 TXDCLKP 1 23V OL 15 TXC2P 1 11V OL 35 Gnd Gnd Gnd 16 Gnd Gnd Gnd 36 TXD3N 1 31V OL labels are video signals 17 TXCCLKN 1 17V OL 37 TXD3P 1 07V OL 1...

Page 78: ... LEDs are controlled by different Clock and Data lines which communicate with the LED Driver IC U1 on the IR board These clock and data lines are from the Main board P901 pins 14 and 15 which are only active when the Power is turned on or off The Key board is routed from the IR board Key 1 pin 4 and Key 2 pin 5 Arriving at P901 on the Main Board then to the Microprocessor 25 and 26 lines The Intel...

Page 79: ... checks R th bl i f th i ti Slide the wire routing bracket to the right to allow the bracket to pull forward Remove the cable wire from the wire routing bracket and reconnect the connector Tab Slide Right Power Power LEDs Infrared Receiver IC2 Light Guide for Power LEDs Key Board Decoder V G O Input Voltage 3 57V Ground Output 1 54V May 201 1 LCD TV 42LV5500 79 Input Voltage 3 57V ...

Page 80: ... Gnd 1 7 Gnd Gnd Gnd Gnd 8 LED_B BUZZ 0V 0V OL 9 IR 1 48V 1 45V 2 61V 10 Gnd Gnd Gnd Gnd 11 3 3V_Normal 0 35V 3 34V OL 12 LED_R BUZZ 0V 0V OL 13 Gnd Gnd Gnd Gnd 14 S T SCL 3 55V 3 49V 2 39V 1 Clock Data pulses only present when Intelligent Sensor is turned on 3 6V p p 2 IR pulses 2V p p 3 14 S T_SCL 3 55V 3 49V 2 39V 15 S T_SDA 3 55V 3 49V 2 39V May 201 1 LCD TV 42LV5500 80 Diode Mode values taken...

Page 81: ...olume 1 67V Volume 10 7M Ohms Volume 1 07V Home 5 4M Ohms Home 0 54V o e 5 O s o e 0 5 Enter 1 19M Ohms Enter 0 12V Key 2 Line y KEY 2 Pin 5 measured from Gnd KEY 2 Pin 5 measured from Gnd CH Up 15 9M Ohms CH Up 1 56V CH Dn 9 8M Ohms CH Dn 0 98V P1 Power 5 7M Ohms Power 0 53V Input 1 19M Ohms Input 0 12V P1 1 May 201 1 LCD TV 42LV5500 81 Diode Mode values taken with all Connectors Removed ...

Page 82: ...much easier You can also adjust the volume change channels and mute the audio with the Motion Remote and it has a convenient Home button for the TV Menu ot o e ote a d t as a co e e t o e butto o t e e u A wrist band can be attached to the remote to avoid dropping and damaging the remote The Motion Remote utilizes a specialized receiver on the Television to receive the RF signal and this informati...

Page 83: ...3 5V_Normal 0 35V 3 34V 1 71V 2 Gnd Gnd Gnd Gnd 3 M_Remote_RX 0 35V 3 33V 2 34V 4 M R t TX 0 35V 3 33V 2 22V 4 M_Remote_TX 0 35V 3 33V 2 22V 5 Reset 0 35V 3 33V 2 41V 6 DC_MRemote 0 35V 3 33V 2 22V 7 DD_MRemote 0 35V 3 33V 2 22V 8 Gnd Gnd Gnd Gnd 9 GPI0 O 0V 0V 2 13V 10 GPI0 1 0V 0V 2 16V 11 GPI0 2 0V 0V 2 18V May 201 1 LCD TV 42LV5500 83 12 GPI0 3 0V 0V 2 22V Diode Mode values taken with all Conn...

Page 84: ...the Invisible Speaker system The 42LV5500 contains the Invisible Speaker system The Full Range Speakers point downward so there is no front viewable speaker grill or air ports Back View Front View Speaker p n EAB62088401 May 201 1 LCD TV 42LV5500 84 ...

Page 85: ...M 11 X 17 FOLDOUT SECTION This section shows the 1 1X17 foldout that s available in the Paper and Adobe version of the Training Manual g When printing us 1 1X17 paper for best results p g p p May 201 1 LCD TV 42LV5500 85 ...

Page 86: ... 4V OL 6 VC 1D EL65 1 2V 10 4V OL 7 n c n a n c OL 8 VC 2A EL66 1 2V 10 4V OL 9 VC 2B EL67 1 2V 10 4V OL 10 VC 2C EL68 1 2V 10 4V OL 11 VC 2D EL69 1 2V 10 4V OL 12 n c n a n c OL 13 LED C256 45V OL White to Black screen P203 Black Plug SMPS Board To Panel LEDs DRV ON B P201 A 3 1 7 5 11 9 15 13 19 17 21 4 2 8 6 12 10 16 14 20 18 22 23 24 SMPS TEST 1 P201 A PWR ON 3 1 7 5 11 9 15 13 19 17 21 4 2 8 ...

Page 87: ...V Gnd 7 n c 5 64V IC2103 1 26V_TU 4 4 6V Pin Regulator 5 4 73V 8 n c 0V Pin Regulator 5 0 95V IC504 2 5V BCM 1 0V Gnd 6 4 73V 9 n c 3 49V 1 0V Gnd 6 0 95V Pin Regulator 2 11 98V In 7 4 73V 10 n c 0V 2 1 27V Out 7 0 95V 1 n c 3 0V Gnd 8 4 73V Vcc In 11 n c 3 34V 3 3 33V In 8 0 95V 2 4 92V En 4 0 79V 12 3 48V 3 3 47V In 5 3 48V 13 0V Q501 RL_ON PWR_On 4 3 49V Ctl 6 3 48V PWR On Off2_1 14 5 59V Pin 1...

Page 88: ...42LV5500 42LV5500 Conclusion Direct View LCD Page Thi l d th This concludes the 42LV5500 training session session ...

Search results

Summary of Contents for 42LV5500

Reviews:

Related manuals for 42LV5500

Brands by name

Popular brands

LG 42LV5500, Training Presentation

Search results

Summary of Contents for 42LV5500

Reviews:

Related manuals for 42LV5500

Brands by name

Popular brands