Manuals / LG Electronics / TV and Video / Flat Panel Television

LG Electronics 32LA62**-Z* service manual Check Power LED, Check Power On ‘”High”, Check ST-BY

Models: 32LA62**-Z*

1 128

Page 98

Standard Repair Process

	Error	B. Power error	Established	2012. 12 .06
LCD TV	Error	B. Power error	date	2012. 12 .06
LCD TV	symptom	No power	Revised date
		No power	Revised date

☞A17

☞A19

Check

Power LED

. Stand-By: Red

. Operating: white

Power LED Y

On?

DC Power on

by pressing Power Key On Remote control

Normal N operation?

Check Power

On ‘”High”

OK?

Replace

Power

B/D

Check Power cord was inserted properly

☞A4

Replace Main B/D

Normal?

Measure voltage of each output of Power B/D

※

READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL 32LA62** 32LA62**-ZSERVICE MANUAL LED TVSAFETY PRECAUTIONS CONTENTSCONTENTS SERVICING PRECAUTIONSSAFETY PRECAUTIONS IMPORTANT SAFETY NOTICESERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesSmall-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Removal1. Application range SPECIFICATION4. Model General Specification 3. Test methodsymbolrate SpecificationSymbolrate 4.0Msymbols/s to 7.2Msymbols/s DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s5. Component Video Input Y, Pb, Pr 6. HDMI Input 6.1. DTV mode 6.2. PC modeCopyright Only for training and service purposes7.1. HDMI 1.4b 3D supported mode automatically LG Electronics. Inc. All rights reserved7.4. RF Input 3D supported mode automatically 7.2. HDMI Input1.37.3. RF Input3D supported mode manually 7.5. USB Input 3D supported mode manually7.8. Component Input3D 3D supported mode manually 7.6. HDMI-PC Input 3D supported mode manually7.7. DLNA Input 3D supported mode manually 7.9. 3D Input mode1. Application Range ADJUSTMENT INSTRUCTION3. Automatic Adjustment 2. Designation3.4. Model name & Serial number Download 3.3. LAN PORT INSPECTIONPING TESTSET PC 3.5. CI+ Key checking method4.1. EDID DATA 4. Manual Adjustment3.6. WIFI MAC ADDRESS CHECK 4.1.2. 2D EDID 4.2. White Balance Adjustment4.2.4. Adj. Command Protocol 4.2.1. Overview4.2.7. ALELF & EDGE LED White balance table 4.2.5. Adj. method4.2.6. Reference White balance Adj. coordinate and color temperature 4.3. Local Dimming Function Check 4.4. Magic Motion Remote control test4.6. Wi-Fi Test 4.5. 3D function test6. Ship-out mode checkIn-stop 7. GND and Internal Pressure check5. Tool Option selection 8. Audio9. USB S/W DownloadService only After downloading, have to adjust Tool Option againLGE2122 DIAGRAMBLOCK reservedEXPLODED VIEW X-TAL EAX64797001* LD33B EAX64872101* LA33BNVRAM Model OptionCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesPLACE AT JACK SIDE LGE Internal Use OnlyLGE Internal Use Only Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved ZD500PLACE AT IC6000 PLACE AT JACK SIDEPLACE AT MAIN SOC SIDE Only for training and service purposesLGE Internal Use Only Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved DDR512MBSSLGE Internal Use Only Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved FROM LPB & PSU PANELPOWERPowerDET +5VNormalMICOM MODEL OPTION Renesas MICOMFor Debug GP4 High/MID Power SEQUENCEHDMI3 Only for training and service purposesSIDE SIDESPDIF OUT Only for training and service purposesSPDIF Copyright 2013 LG Electronics. Inc. All rights reservedLGE Internal Use Only Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved JACKCOMMONUART FOR DEBUG Only for training and service purposesAV/COMPONENT REAR Copyright 2013 LG Electronics. Inc. All rights reservedMREMOTE&WIFIWAFER MAX 0.4AOnly for training and service purposes AR4100USB3 MAX 1.5A OCP USB2/3USB2 MAX 1.5A Only for training and service purposesMAX 1.5A USB1OCP USB1 IC4500Copyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesFull Scart18 Pin Gender LGE Internal Use OnlyCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesEthernet Block LGE Internal Use OnlyAMPMUTEPWRDET Only for training and service purposes0x54 Copyright 2013 LG Electronics. Inc. All rights reservedCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesSCART AUDIO MUTE LGE Internal Use OnlyHEADPHONE AMP EARPHONE AMP 18pFOnly for training and service purposes 2011.09.29Copyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesCI POWER ENABLE CONTROL LGE Internal Use OnlyCopyright 2013 LG Electronics. Inc. All rights reserved B-CAS SMART CARD INTERFACEOnly for training and service purposes LGE Internal Use OnlyCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesVout=0.6*1+R1/R2 LGE Internal Use OnlyTU6601 Only for training and service purposesTU6600 TU6602JP6801 RS-232C Control INTERFACEJP6800 Only for training and service purposes DVB-S2 LNB Part AllegroOptionLNB Input trace widths should be sized to conduct at least 3A51Pin LVDS OUTPUT Connector LVDSOnly for training and service purposes 41Pin LVDS OUTPUT ConnectorCopyright 2013 LG Electronics. Inc. All rights reserved LOCAL DIMMINGOnly for training and service purposes LGE Internal Use OnlyLEVEL SHIFTER BLOCK POWER BLOCKTHIS IS REVERSE PATTERN Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesT-Con LGE Internal Use OnlyOnly for training and service purposes Don’t Connect Power At VDDIeMMC I/F Just Interal LDO CapacitorLGE Internal Use Only Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved +24VAMP OPT C5450 10uF 35VUSE Two serial TS Port for Japan MTK A2 Ball Name Function JAPAN TUNER INTERFACEOnly for training and service purposes DEMODTSCLK ExtTSCLK DEMODTSSYNC ExtTSSync DEMODTSDATA0 ExtTsD0Page Only for training and service purposes Applicable Model Mid-end Platform XXLA74*-Z XXLA71*-Z XXLA69/66*-ZXXLA64/62/61*-Z XXLN57*-Z 2013 LED/LCD TV Engineering guideInstruction of new sub ass’ys 6. Adjust way of new features CONTENT1. New features 2. Main PCBs 3. Block Diagrams, IIC Map 4. Structure of TV set and connection of sub ass’ys 5. New sub ass’ysMerits EPIEmbedded Point-Point Interface FeaturesEPI Interface EPI TCON EPI Interface mini-LVDS vs. EPIHF mini-LVDS TCON ComparisonHF mini-LVDS FeaturesEPI Interface mini-LVDS vs. EPI TopologyNFC Tag NFC Near field communicationUser Action Area From TV to Smart phoneOnly for training and service purposes Main PCB for BroadbandWIFI/BT xxLA660S-Zx1. LGE2122 Block Diagram IC105 LGE 2. LGE 2122 I2C Block Diagram3. Power Block Diagram 3.5VTDSQ G501D Only for training and service purposesCI Slot Copyright 2013 LG Electronics. Inc. All rights reservedJack Side 5. Video/Audio In Block DiagramOnly for training and service purposes SoC SideCopyright 2013 LG Electronics. Inc. All rights reserved 6. Audio Out Block DiagramOnly for training and service purposes LGE Internal Use OnlyHDMI2 Only for training and service purposesHDMI1 HDMI3Level Shift Only for training and service purposesPMIC TPS65178Level Shift 9. PMIC & Level Shift Bloc DiagramPMIC TPS651784Pin debugging wafer Only for training and service purposesMotion Remote Receiver RENESAS MICOMCables InterconnectionPCBs 47LA660S-ZAPCBs Only for training and service purposesInterconnection Cables5. Pairing/Un-pairing Method Introductions of 13Y RF ass’y + Magic Remote control1. System 2. Remote Buttons 3. MR13 Block Diagram 4. Function List Only for training and service purposesPairing Information Transmission Sequence 1. System Pairing Information Transmission Send to TV after Paired  Motion Data TransmissionMR13 Remote 2. Remote Buttons M4 vs. MR13M4 Remote repeatBluetooth Remote control 3. MR13 Block DiagramPower Management Bluetooth ReceiverBattery Boost up Regulator 4. Function listWireless communication RF, Gyro, Accelerometer Power SupplyDescription 5. RF Pairing / Un-pairing MethodMethod Only for training and service purposes Introductions of 13Y WIFI built in ass’y1. Wi-Fi built in Ass’y feature 2. Wi-Fi built in Ass’y specification Copyright 2013 LG Electronics. Inc. All rights reservedSwitch WIFI Built in ass’y featurePin map SwitchCopyright 2013 LG Electronics. Inc. All rights reserved WIFI Built in ass’y SpecificationOnly for training and service purposes LGE Internal Use OnlyContents Widevine & HDCP 2.0 & NETFLX1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM Only for training and service purposes1. Widevine?  Why HDCP2.0? 2. HDCP 2.0 & NETFLIX? Netflix  HDCP3. DTCP? Current 4. Changed BOMAs-Was Changed ItemContents of LCD TV Standard Repair Process Content Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom PageCheck Power Board 12v,3.5v etc Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D CableCheck Power Board 24v output Replace T-con Board or module And Adjust VCOM3.5V,12V,20V or 24V… Check various voltages of Power BoardOnly for training and service purposes Copyright 2013 LG Electronics. Inc. All rights reservedSignal strength Normal over 50% Signal Quality Normal over 50% By using Digital signal level meter By using Diagnostics menu on OSDMenu→ Set up→ Support → Signal Test Check RF Signal levelLCD TV A. Picture Problem DVB-S/S2Check RF Signal level → Set-Top-Box, Different maker TV etc※ Check and A10/ A11Check color by input -External Input COMPONENT replace LinkReplace Main B/D adjust VCOM External device screen error-Color errorVertical/Horizontal bar, residual image, light spot A10/ A11Measure voltage of each output of Power B/D Check Power LEDCheck Power On ‘”High” Check ST-BYPOWEROFFABNORMAL1 Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage POWEROFFCPUABNORMALCheck audio B+ 24V of Power Board Check user menu Speaker offIn case of External Input signal error Check and fix external device Check audio B+ VoltageCheck 3.5v on Power B/D Replace Power B/D or Replace Main B/D Check & Repair Cable connection Connector solderCheck IR Output signal Power B/D don’t have problemsymptom D. Function errorError External device recognition errorIdentify noise type LCD TV Adjust VCOMF. Exterior defect Check S/W Version G. Network ErrorLCD TV Check defect CI slot pin  Check SVC BulletinContent Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom Continued from previous pageEntry method Standard Repair Process Detail Technical ManualALL MODELS Check the DC 24V, 12V 24 Pin Power Board ↔ Main BoardStandard Repair Process Detail Technical Manual SMAW200-H24SWhen the signal is strong, use the attenuator -10dB, -15dB, -20dB etc A. Video errorVideo error, video lag/stopMENU  support  signal test  select channel Only for training and service purposesPress the IN-START with the remote controller for adjustment A. Video errorVideo error, video lag/stop1. Checking method for remote controller for adjustment Only for training and service purposesStandard Repair Process Detail Technical Manual A. Video error Vertical/Horizontal bar, residualOnly for training and service purposes image, light spotALL MODELS A. Video errorVideo error, video lag/stopStandard Repair Process Detail Technical Manual Checking methodMODULE error ADD-BAR,SCAN BAR A. Video errorColor errorYou can view 6 types of patterns using the ADJ Key 4.Video error Classification of MODULE or Main-B/DAbnormal Power Section Appendix Exchange EPI Cable or Main B/DAbnormal Power Section Only for training and service purposesFuse Open, Abnormal power section Abnormal Power SectionAbnormal Power Section Only for training and service purposesNo Light Appendix Exchange LPBLED driverOnly for training and service purposes Dim LightPanel Mura, Light leakage Crosstalk Press damage Appendix Exchange the ModuleUn-repairable Cases In this case please exchange the module Panel Mura, Light leakageAppendix Exchange the Module Un-repairable Cases In this case please exchange the moduleStandard Repair Process Detail Technical Manual Front LOGO LED control in the status of ST-BY ConditionStandard Repair Process Detail Technical Manual When st-by, only 3.5V is normally on24 Pin Power Board ↔ Main Board For ’10 models, there is no voltage out for st-by purposeChecking method when power is ON Check “power on” pin is high24 Pin Power Board ↔ Main Board Standard Repair Process Detail Technical ManualB. Power error Off when on, off whiling viewing 1. Press the IN-START button of the remote controller for adjustment2. Check the entry into adjustment item Only for training and service purposesOnly for training and service purposes C. Audio errorNo audio/Normal video1. Press the MENU button on the remote controller Standard Repair Process Detail Technical ManualChecking order when there is no audio C. Audio errorNo audio/Normal video24 Pin Power Board ↔ Main Board Standard Repair Process Detail Technical ManualALL MODELS Standard Repair Process Detail Technical Manual③ ④ ② ① Standard Repair Process Detail Technical Manual LCD module change T-Con board change

Copyright © 2013 LG Electronics. Inc. All rights reserved.	25 / 88	LGE Internal Use Only
Only for training and service purposes	25 / 88

Check

Check Power

Measure voltage of each output of Power B/D

Check ST-BY 3.5V