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

LG Electronics 32LA62**-Z* Check user menu Speaker off, Check audio B+ 24V of Power Board

Models: 32LA62**-Z*

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Standard Repair Process

	Error	C. Audio error	Established	2012. 12 .06
LCD TV	Error	C. Audio error	date	2012. 12 .06
LCD TV	symptom	No audio/ Normal video	Revised date
		No audio/ Normal video	Revised date

☞A24

☞A25

No audio Screen normal

Check user menu > Speaker off

Off

Check audio B+ 24V of Power Board

Normal Y voltage

Cancel OFF

Replace Power Board and repair parts

Check Speaker	N
disconnection	Disconnection
disconnection

Replace Speaker

Replace MAIN Board

End

Copyright © 2013 LG Electronics. Inc. All rights reserved.	27 / 88	LGE Internal Use Only
Only for training and service purposes	27 / 88

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Image 100

LG Electronics 32LA62**-Z* service manual Check user menu Speaker off, Check audio B+ 24V of Power Board

Contents

MODEL 32LA62** 32LA62**-Z SERVICE MANUALREAD THE SAFETY PRECAUTIONS IN THIS MANUAL LED TVCONTENTS CONTENTSSAFETY PRECAUTIONS SERVICING PRECAUTIONSSAFETY PRECAUTIONS IMPORTANT SAFETY NOTICESERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesIC Remove/Replacement ReplacementSmall-Signal Discrete Transistor Removal/Replacement RemovalSPECIFICATION 4. Model General Specification1. Application range 3. Test methodSpecification Symbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s5. Component Video Input Y, Pb, Pr 6. HDMI Input 6.1. DTV mode 6.2. PC modeOnly for training and service purposes 7.1. HDMI 1.4b 3D supported mode automaticallyCopyright LG Electronics. Inc. All rights reserved7.2. HDMI Input1.3 7.3. RF Input3D supported mode manually7.4. RF Input 3D supported mode automatically 7.5. USB Input 3D supported mode manually7.6. 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 modeADJUSTMENT INSTRUCTION 3. Automatic Adjustment1. Application Range 2. Designation3.3. LAN PORT INSPECTIONPING TEST SET PC3.4. Model name & Serial number Download 3.5. CI+ Key checking method3.6. WIFI MAC ADDRESS CHECK 4. Manual Adjustment4.1. EDID DATA 4.2. White Balance Adjustment 4.2.4. Adj. Command Protocol4.1.2. 2D EDID 4.2.1. Overview4.2.6. Reference White balance Adj. coordinate and color temperature 4.2.5. Adj. method4.2.7. ALELF & EDGE LED White balance table 4.4. Magic Motion Remote control test 4.6. Wi-Fi Test4.3. Local Dimming Function Check 4.5. 3D function test7. GND and Internal Pressure check 5. Tool Option selection6. Ship-out mode checkIn-stop 8. Audio9. USB S/W DownloadService only After downloading, have to adjust Tool Option againDIAGRAM BLOCKLGE2122 reservedEXPLODED VIEW EAX64797001* LD33B EAX64872101* LA33B NVRAMX-TAL Model OptionOnly for training and service purposes PLACE AT JACK SIDECopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes Copyright 2013 LG Electronics. Inc. All rights reservedLGE Internal Use Only ZD500PLACE AT JACK SIDE PLACE AT MAIN SOC SIDEPLACE AT IC6000 Only for training and service purposesOnly for training and service purposes Copyright 2013 LG Electronics. Inc. All rights reservedLGE Internal Use Only DDR512MBSSCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesLGE Internal Use Only PANELPOWER PowerDETFROM LPB & PSU +5VNormalRenesas MICOM For DebugMICOM MODEL OPTION GP4 High/MID Power SEQUENCEOnly for training and service purposes SIDEHDMI3 SIDEOnly for training and service purposes SPDIFSPDIF OUT Copyright 2013 LG Electronics. Inc. All rights reservedOnly for training and service purposes Copyright 2013 LG Electronics. Inc. All rights reservedLGE Internal Use Only JACKCOMMONOnly for training and service purposes AV/COMPONENT REARUART FOR DEBUG Copyright 2013 LG Electronics. Inc. All rights reservedMAX 0.4A Only for training and service purposesMREMOTE&WIFIWAFER AR4100OCP USB2/3 USB2 MAX 1.5AUSB3 MAX 1.5A Only for training and service purposesUSB1 OCP USB1MAX 1.5A IC4500Only for training and service purposes Full Scart18 Pin GenderCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes Ethernet BlockCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes 0x54AMPMUTEPWRDET Copyright 2013 LG Electronics. Inc. All rights reservedOnly for training and service purposes SCART AUDIO MUTECopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyEARPHONE AMP 18pF Only for training and service purposesHEADPHONE AMP 2011.09.29Only for training and service purposes CI POWER ENABLE CONTROLCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyB-CAS SMART CARD INTERFACE Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes Vout=0.6*1+R1/R2Copyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes TU6600TU6601 TU6602JP6800 RS-232C Control INTERFACEJP6801 DVB-S2 LNB Part Allegro OptionLNBOnly for training and service purposes Input trace widths should be sized to conduct at least 3ALVDS Only for training and service purposes51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT ConnectorLOCAL DIMMING Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyPOWER BLOCK THIS IS REVERSE PATTERNLEVEL SHIFTER BLOCK Only for training and service purposesOnly for training and service purposes T-ConCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyDon’t Connect Power At VDDI eMMC I/FOnly for training and service purposes Just Interal LDO CapacitorOnly for training and service purposes Copyright 2013 LG Electronics. Inc. All rights reservedLGE Internal Use Only +24VAMP OPT C5450 10uF 35VJAPAN TUNER INTERFACE Only for training and service purposesUSE Two serial TS Port for Japan MTK A2 Ball Name Function DEMODTSCLK ExtTSCLK DEMODTSSYNC ExtTSSync DEMODTSDATA0 ExtTsD0Page Applicable Model Mid-end Platform XXLA74*-Z XXLA71*-Z XXLA69/66*-Z XXLA64/62/61*-Z XXLN57*-ZOnly for training and service purposes 2013 LED/LCD TV Engineering guideCONTENT 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’ysEPI Interface EPIEmbedded Point-Point Interface FeaturesMerits EPI Interface mini-LVDS vs. EPI HF mini-LVDS TCONEPI TCON ComparisonFeatures EPI Interface mini-LVDS vs. EPIHF mini-LVDS TopologyNFC Near field communication User Action AreaNFC Tag From TV to Smart phoneMain PCB for Broadband WIFI/BTOnly for training and service purposes xxLA660S-Zx1. LGE2122 Block Diagram IC105 LGE 2. LGE 2122 I2C Block Diagram3. Power Block Diagram 3.5VOnly for training and service purposes CI SlotTDSQ G501D Copyright 2013 LG Electronics. Inc. All rights reserved5. Video/Audio In Block Diagram Only for training and service purposesJack Side SoC Side6. Audio Out Block Diagram Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes HDMI1HDMI2 HDMI3Only for training and service purposes PMICLevel Shift TPS651789. PMIC & Level Shift Bloc Diagram PMICLevel Shift TPS65178Only for training and service purposes Motion Remote Receiver4Pin debugging wafer RENESAS MICOMInterconnection PCBsCables 47LA660S-ZAOnly for training and service purposes InterconnectionPCBs CablesIntroductions of 13Y RF ass’y + Magic Remote control 1. System 2. Remote Buttons 3. MR13 Block Diagram 4. Function List5. Pairing/Un-pairing Method Only for training and service purposes1. System  Pairing Information Transmission Send to TV after PairedPairing Information Transmission Sequence  Motion Data Transmission2. Remote Buttons M4 vs. MR13 M4 RemoteMR13 Remote repeat3. MR13 Block Diagram Power ManagementBluetooth Remote control Bluetooth Receiver4. Function list Wireless communicationBattery Boost up Regulator RF, Gyro, Accelerometer Power SupplyMethod 5. RF Pairing / Un-pairing MethodDescription Introductions of 13Y WIFI built in ass’y 1. Wi-Fi built in Ass’y feature 2. Wi-Fi built in Ass’y specificationOnly for training and service purposes Copyright 2013 LG Electronics. Inc. All rights reservedWIFI Built in ass’y feature Pin mapSwitch SwitchWIFI Built in ass’y Specification Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyWidevine & HDCP 2.0 & NETFLX 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOMContents Only for training and service purposes1. Widevine? 2. HDCP 2.0 & NETFLIX?  Netflix Why HDCP2.0?  HDCP3. DTCP? 4. Changed BOM As-WasCurrent Changed ItemContents of LCD TV Standard Repair Process Contents of LCD TV Standard Repair Process Detail Technical Manual Error symptomContent PageMain 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 VCOMCheck various voltages of Power Board Only for training and service purposes3.5V,12V,20V or 24V… Copyright 2013 LG Electronics. Inc. All rights reservedBy 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 levelA. Picture Problem DVB-S/S2 Check RF Signal levelLCD TV → Set-Top-Box, Different maker TV etcA10/ A11 Check color by input -External Input COMPONENT※ Check and replace LinkExternal device screen error-Color error Vertical/Horizontal bar, residual image, light spotReplace Main B/D adjust VCOM A10/ A11Check Power LED Check Power On ‘”High”Measure voltage of each output of Power B/D Check ST-BYCheck Power Off Mode If Power Off mode is not displayed Check Power B/D voltagePOWEROFFABNORMAL1 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 & 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 problemD. Function error Errorsymptom External device recognition errorIdentify noise type F. Exterior defect Adjust VCOMLCD TV LCD TV G. Network ErrorCheck S/W Version Check defect CI slot pin  Check SVC BulletinContents of LCD TV Standard Repair Process Detail Technical Manual Error symptomContent Continued from previous pageALL MODELS Standard Repair Process Detail Technical ManualEntry method 24 Pin Power Board ↔ Main Board Standard Repair Process Detail Technical ManualCheck the DC 24V, 12V SMAW200-H24SA. Video errorVideo error, video lag/stop MENU  support  signal test  select channelWhen the signal is strong, use the attenuator -10dB, -15dB, -20dB etc Only for training and service purposesA. Video errorVideo error, video lag/stop 1. Checking method for remote controller for adjustmentPress the IN-START with the remote controller for adjustment Only for training and service purposesA. Video error Vertical/Horizontal bar, residual Only for training and service purposesStandard Repair Process Detail Technical Manual image, light spotA. Video errorVideo error, video lag/stop Standard Repair Process Detail Technical ManualALL MODELS Checking methodA. 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/DAppendix Exchange EPI Cable or Main B/D Abnormal Power SectionAbnormal Power Section Only for training and service purposesAbnormal Power Section Abnormal Power SectionFuse Open, Abnormal power section Only for training and service purposesAppendix Exchange LPBLED driver Only for training and service purposesNo Light Dim LightAppendix Exchange the Module Un-repairable Cases In this case please exchange the modulePanel Mura, Light leakage Crosstalk Press damage 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 ConditionWhen st-by, only 3.5V is normally on 24 Pin Power Board ↔ Main BoardStandard Repair Process Detail Technical Manual For ’10 models, there is no voltage out for st-by purposeCheck “power on” pin is high 24 Pin Power Board ↔ Main BoardChecking method when power is ON Standard Repair Process Detail Technical Manual1. 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 Only for training and service purposesC. Audio errorNo audio/Normal video 1. Press the MENU button on the remote controllerOnly for training and service purposes Standard Repair Process Detail Technical ManualC. Audio errorNo audio/Normal video 24 Pin Power Board ↔ Main BoardChecking order when there is no audio Standard Repair Process Detail Technical Manual③ ④ ② ① Standard Repair Process Detail Technical ManualALL MODELS Standard Repair Process Detail Technical Manual LCD module change T-Con board change