Check Back Light, On with naked eye | LG Electronics 32LA62**-Z*

(Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)

Standard Repair Process

LCD TV

	Error	A. Video error	Established	2012. 12 .06
			date

	symptom	No video/ Normal audio	Revised date

First of all, Check whether all of cables between board is inserted properly or not.

(Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)

No video Normal audio

Normal Y audio

N

Move to No video/No audio

☞A1

Check Back Light			On	Y
On with naked eye			On
On with naked eye
			N
			N

☞A2	Check Power Board 24v output
			Normal	Y
			voltage
			N
			Repair Power
			Board or parts

☞A4

Check Power Board 12v,3.5v etc.

Replace Inverter or module

Normal Y voltage

N

Repair Power Board or parts

End

Replace T-con Board or module

And Adjust VCOM

☞A28

※Precaution ☞A7 & A3

Always check & record S/W Version and White Balance value before replacing the Main Board

Replace Main Board

Re-enter White Balance value

Copyright © 2013 LG Electronics. Inc. All rights reserved.	19 / 88	LGE Internal Use Only
Only for training and service purposes	19 / 88

Image 92

LG Electronics 32LA62**-Z* Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable, Check Back Light, On with naked eye

Contents

MODEL 32LA62** 32LA62**-Z SERVICE MANUALREAD THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV CONTENTS CONTENTSSAFETY PRECAUTIONS SERVICING PRECAUTIONS SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE SERVICING PRECAUTIONS Electrostatically Sensitive ES Devices IC Remove/Replacement ReplacementSmall-Signal Discrete Transistor Removal/Replacement Removal SPECIFICATION 4. Model General Specification1. Application range 3. Test method Symbolrate 4.0Msymbols/s to 7.2Msymbols/s symbolrateDVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s DVB-S QPSK 2 ~ 45Msymbol/s 5. Component Video Input Y, Pb, Pr 6. HDMI Input 6.1. DTV mode 6.2. PC mode 7.1. HDMI 1.4b 3D supported mode automatically 7.2. HDMI Input1.3 7.3. RF Input3D supported mode manually7.4. RF Input 3D supported mode automatically 7.5. USB Input 3D supported mode manually 7.6. HDMI-PC Input 3D supported mode manually 7.7. DLNA Input 3D supported mode manually7.8. Component Input3D 3D supported mode manually 7.9. 3D Input mode ADJUSTMENT INSTRUCTION 3. Automatic Adjustment1. Application Range 2. Designation 3.3. LAN PORT INSPECTIONPING TEST SET PC3.4. Model name & Serial number Download 3.5. CI+ Key checking method 4.1. EDID DATA 4. Manual Adjustment3.6. WIFI MAC ADDRESS CHECK 4.2. White Balance Adjustment 4.2.4. Adj. Command Protocol4.1.2. 2D EDID 4.2.1. Overview 4.2.7. ALELF & EDGE LED White balance table 4.2.5. Adj. method4.2.6. Reference White balance Adj. coordinate and color temperature 4.4. Magic Motion Remote control test 4.6. Wi-Fi Test4.3. Local Dimming Function Check 4.5. 3D function test 7. GND and Internal Pressure check 5. Tool Option selection6. Ship-out mode checkIn-stop 8. Audio 9. USB S/W DownloadService only After downloading, have to adjust Tool Option again DIAGRAM BLOCKLGE2122 reserved EXPLODED VIEW EAX64797001* LD33B EAX64872101* LA33B NVRAMX-TAL Model Option PLACE AT JACK SIDE IC105LGE2122A2M13 IC105 LGE2122A2M13 ZD500 PLACE AT IC6000 PLACE AT JACK SIDEPLACE AT MAIN SOC SIDE DDR512MBSS IC701K4B4G1646B-HCK0 IC703 K4B4G1646B-HCK0 LGE Internal Use Only PANELPOWER PowerDETFROM LPB & PSU +5VNormal Renesas MICOM For DebugMICOM MODEL OPTION GP4 High/MID Power SEQUENCE SIDE HDMI3 SPDIF SPDIF OUTJACK HIGH / MID 2011.11.21 JACKCOMMON AV/COMPONENT REAR UART FOR DEBUG MAX 0.4A MREMOTE&WIFIWAFERAR4100 1/16W OCP USB2/3 USB2 MAX 1.5AUSB3 MAX 1.5A IC4306 USB1 OCP USB1MAX 1.5A IC4500 Full Scart18 Pin Gender JK4600SCART GENDER 2011.10.26 2012.03.08 Ethernet BlockLANVERTICAL 0x54 AMPMUTEPWRDET AZ4580MTR-E1 SCART AUDIO MUTEIC6000 2011.09.29 EARPHONE AMP 18pFHEADPHONE AMP 2011.10.31 CI POWER ENABLE CONTROLCI SLOT B-CAS SMART CARD INTERFACE +3.3VNORMALTDA8024TT +5VNORMAL Vout=0.6*1+R1/R2 TU6600 TU6601TU6602 TDSS-G501DB JP6801 RS-232C Control INTERFACEJP6800 DVB-S2 LNB Part Allegro OptionLNBInput trace widths should be sized to conduct at least 3A Ouput trace widths should be sized to conduct at least 2A LVDS 51Pin LVDS OUTPUT Connector41Pin LVDS OUTPUT Connector LVDSHIGHMID LOCAL DIMMING P7600 12507WR-08L L/DIMOUT8PR7601 10K L/DIMOUT8P L/DIM0SCLKPWR L/DIM0MOSIPWR R7603 I2CSCL1 L/DIMOUT8P R7602 POWER BLOCK THIS IS REVERSE PATTERNLEVEL SHIFTER BLOCK T-Con Only for training and service purposes Don’t Connect Power At VDDI eMMC I/FJust Interal LDO Capacitor EMMC +24VAMP OPT C5450 10uF 35V JAPAN TUNER INTERFACE USE Two serial TS Port for Japan MTK A2 Ball Name FunctionDEMODTSCLK ExtTSCLK DEMODTSSYNC ExtTSSync DEMODTSDATA0 ExtTsD0 DEMODTSVAL ExtTsVAL DEMODTSDATA1 EXT2TsCLK DEMODTSDATA3 EXT2TSSyncPage 2013 LED/LCD TV Engineering guide Applicable Model Mid-end Platform XXLA74*-Z XXLA71*-Z XXLA69/66*-ZXXLA64/62/61*-Z XXLN57*-Z CONTENT 1. New features 2. Main PCBs 3. Block Diagrams, IIC MapInstruction of new sub ass’ys 6. Adjust way of new features 4. Structure of TV set and connection of sub ass’ys 5. New sub ass’ys Merits EPIEmbedded Point-Point Interface FeaturesEPI Interface EPI Interface mini-LVDS vs. EPI HF mini-LVDS TCONEPI TCON Comparison Features HF mini-LVDSTopology Protocol NFC Near field communication User Action AreaNFC Tag From TV to Smart phone Main PCB for Broadband WIFI/BTxxLA660S-Zx Chassis LD33B 1. LGE2122 Block Diagram IC105 LGE 2. LGE 2122 I2C Block Diagram 3. Power Block Diagram 3.5V CI Slot TDSQ G501D SoC Side 5. Video/Audio In Block DiagramJack Side 6. Audio Out Block Diagram Tuner HDMI1 HDMI2HDMI3 RENESAS WOLCTL MICOM PMIC Level ShiftTPS65178 TPS65198 9. PMIC & Level Shift Bloc Diagram Motion Remote Receiver 4Pin debugging waferRENESAS MICOM USBDM1 USBDP1 /USBOCD1 USBCTL1 Interconnection PCBsCables 47LA660S-ZA 6 IR Assy 7 IR to Local Key 3Pin Cable 8 IR to Logo Assy 4Pin Cable 5. Pairing/Un-pairing Method Introductions of 13Y RF ass’y + Magic Remote control1. System 2. Remote Buttons 3. MR13 Block Diagram 4. Function List 1. System  Pairing Information Transmission Send to TV after PairedPairing Information Transmission Sequence  Motion Data Transmission 2. Remote Buttons M4 vs. MR13 M4 RemoteMR13 Remote repeat 3. MR13 Block Diagram Power ManagementBluetooth Remote control Bluetooth Receiver 4. Function list Wireless communicationBattery Boost up Regulator RF, Gyro, Accelerometer Power Supply Description 5. RF Pairing / Un-pairing MethodMethod Introductions of 13Y WIFI built in ass’y 1. Wi-Fi built in Ass’y feature 2. Wi-Fi built in Ass’y specification WIFI Built in ass’y feature Pin mapSwitch Wafer WIFI Built in ass’y Specification Widevine & HDCP 2.0 & NETFLX 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOMContents 2012. 12 1. Widevine? 2. HDCP 2.0 & NETFLIX?  Netflix Why HDCP2.0?  HDCP 3. DTCP? 4. Changed BOM As-WasCurrent Changed Item Contents of LCD TV Standard Repair Process Contents of LCD TV Standard Repair Process Detail Technical Manual Error symptomContent Page Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable Check Power Board 24v outputCheck Power Board 12v,3.5v etc Replace T-con Board or module And Adjust VCOM Check various voltages of Power Board 3.5V,12V,20V or 24V… By using Digital signal level meter By using Diagnostics menu on OSD Menu→ Set up→ Support → Signal TestSignal strength Normal over 50% Signal Quality Normal over 50% Check RF Signal level A. Picture Problem DVB-S/S2 → Set-Top-Box, Different maker TV etc A10/ A11 Check color by input -External Input COMPONENT※ Check and replace Link External device screen error-Color error Vertical/Horizontal bar, residual image, light spotReplace Main B/D adjust VCOM A10/ A11 Check Power LED Check Power On ‘”High”Measure voltage of each output of Power B/D Check ST-BY Check Power Off Mode If Power Off mode is not displayed Check Power B/D voltagePOWEROFFABNORMAL1 POWEROFFCPUABNORMAL Check audio B+ 24V of Power Board Check user menu Speaker off In case of External Input signal error Check and fix external device Check audio B+ Voltage Check & Repair Cable connection Connector solder Check IR Output signalCheck 3.5v on Power B/D Replace Power B/D or Replace Main B/D Power B/D don’t have problem D. Function error External device recognition error Identify noise type Adjust VCOM F. Exterior defect G. Network Error Check defect CI slot pin  Check SVC Bulletin Continued from previous page Entry method Standard Repair Process Detail Technical ManualALL MODELS SMAW200-H24S 24 Pin Power Board ↔ Main BoardCheck the DC 24V, 12V When the signal is strong, use the attenuator -10dB, -15dB, -20dB etc A. Video errorVideo error, video lag/stopMENU  support  signal test  select channel 1. Checking method for remote controller for adjustment Press the IN-START with the remote controller for adjustmentVersion ALL MODELS A. Video error Vertical/Horizontal bar, residual image, light spot Checking method A. Video errorColor error You can view 6 types of patterns using the ADJ KeyMODULE error ADD-BAR,SCAN BAR 4.Video error Classification of MODULE or Main-B/D Appendix Exchange EPI Cable or Main B/D Abnormal Power SectionSolder defect, CNT Broken Solder defect, Short/Crack Fuse Open, Abnormal power section Abnormal DisplayGRADATION Noise Dim Light Appendix Exchange LPBLED driverNo Light Appendix Exchange the Module Un-repairable Cases In this case please exchange the modulePanel Mura, Light leakage Crosstalk Press damage Panel Mura, Light leakage Appendix Exchange the Module Front LOGO LED control in the status of ST-BY Condition When st-by, only 3.5V is normally on For ’10 models, there is no voltage out for st-by purpose Check “power on” pin is high Checking method when power is ON 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment itemB. Power error Off when on, off whiling viewing Entry method C. Audio errorNo audio/Normal video 1. Press the MENU button on the remote controller2. Select the SOUND function of the Menu 3. Change TV Sound Out to TV Speaker Checking order when there is no audio ③ ④ ② ① LCD module change T-Con board change