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

LG Electronics 32LA62**-Z* service manual Check audio B+ Voltage

Models: 32LA62**-Z*

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Check audio

Standard Repair Process

LCD TV

Error

symptom

C. Audio error	Established	2012. 12 .06
C. Audio error	date	2012. 12 .06
	date
Wrecked audio/ discontinuation/noise	Revised date

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

Check input signal -RF

-External Input signal

Signal normal?

N

Y

(When RF signal is not received)

Wrecked audio/ Discontinuation/ Noise for

all audio

Wrecked audio/ Discontinuation/ Noise only

for D-TV

Wrecked audio/ Discontinuation/ Noise only

for Analog

Check and replace speaker and connector

Replace Main B/D

☞A25

Check audio

B+ Voltage (24V)

Y

Normal

voltage?

N

Replace Power B/D

Request repair to external cable/ANT provider

(In case of External Input signal error) Check and fix external device

Wrecked audio/ Discontinuation/ Noise only

for External Input

Connect and check other external device

Normal audio?

Y

Replace B/D

N

End

Check and fix external device

Copyright © 2013 LG Electronics. Inc. All rights reserved.	28 / 88	LGE Internal Use Only
Only for training and service purposes	28 / 88

Image 101

LG Electronics 32LA62**-Z* Check audio B+ Voltage, In case of External Input signal error Check and fix external device

Contents

SERVICE MANUAL MODEL 32LA62** 32LA62**-ZREAD THE SAFETY PRECAUTIONS IN THIS MANUAL LED TVCONTENTS CONTENTSSAFETY PRECAUTIONS SERVICING PRECAUTIONSIMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSReplacement IC Remove/ReplacementSmall-Signal Discrete Transistor Removal/Replacement Removal4. Model General Specification SPECIFICATION1. Application range 3. Test methodSymbolrate 4.0Msymbols/s to 7.2Msymbols/s Specificationsymbolrate DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s5. Component Video Input Y, Pb, Pr 6.2. PC mode 6. HDMI Input 6.1. DTV modeOnly for training and service purposes 7.1. HDMI 1.4b 3D supported mode automaticallyCopyright LG Electronics. Inc. All rights reserved7.4. RF Input 3D supported mode automatically 7.3. RF Input3D supported mode manually7.5. USB Input 3D supported mode manually 7.2. HDMI Input1.37.7. DLNA Input 3D supported mode manually 7.6. HDMI-PC Input 3D supported mode manually7.8. Component Input3D 3D supported mode manually 7.9. 3D Input mode3. Automatic Adjustment ADJUSTMENT INSTRUCTION1. Application Range 2. DesignationSET PC 3.3. LAN PORT INSPECTIONPING TEST3.4. Model name & Serial number Download 3.5. CI+ Key checking method4.1. EDID DATA 4. Manual Adjustment3.6. WIFI MAC ADDRESS CHECK 4.2.4. Adj. Command Protocol 4.2. White Balance Adjustment4.1.2. 2D EDID 4.2.1. Overview4.2.7. ALELF & EDGE LED White balance table 4.2.6. Reference White balance Adj. coordinate and color temperature4.2.5. Adj. method 4.6. Wi-Fi Test 4.4. Magic Motion Remote control test4.3. Local Dimming Function Check 4.5. 3D function test7. GND and Internal Pressure check 6. Ship-out mode checkIn-stop5. Tool Option selection 8. AudioAfter downloading, have to adjust Tool Option again 9. USB S/W DownloadService onlyBLOCK DIAGRAMLGE2122 reservedEXPLODED VIEW NVRAM EAX64797001* LD33B EAX64872101* LA33BX-TAL Model OptionPLACE AT JACK SIDE Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesLGE Internal Use Only ZD500PLACE AT MAIN SOC SIDE PLACE AT JACK SIDEPLACE AT IC6000 Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesLGE Internal Use Only DDR512MBSSLGE Internal Use Only Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved PowerDET PANELPOWERFROM LPB & PSU +5VNormalFor Debug Renesas MICOMMICOM MODEL OPTION GP4 High/MID Power SEQUENCESIDE Only for training and service purposesHDMI3 SIDESPDIF Only for training and service purposesSPDIF OUT Copyright 2013 LG Electronics. Inc. All rights reservedCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesLGE Internal Use Only JACKCOMMONAV/COMPONENT REAR Only for training and service purposesUART FOR DEBUG Copyright 2013 LG Electronics. Inc. All rights reservedOnly for training and service purposes MAX 0.4AMREMOTE&WIFIWAFER AR4100USB2 MAX 1.5A OCP USB2/3USB3 MAX 1.5A Only for training and service purposesOCP USB1 USB1MAX 1.5A IC4500Full Scart18 Pin Gender Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyEthernet Block Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use Only0x54 Only for training and service purposesAMPMUTEPWRDET Copyright 2013 LG Electronics. Inc. All rights reservedSCART AUDIO MUTE Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes EARPHONE AMP 18pFHEADPHONE AMP 2011.09.29CI POWER ENABLE CONTROL Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes B-CAS SMART CARD INTERFACECopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyVout=0.6*1+R1/R2 Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyTU6600 Only for training and service purposesTU6601 TU6602JP6801 RS-232C Control INTERFACEJP6800 OptionLNB DVB-S2 LNB Part AllegroOnly for training and service purposes Input trace widths should be sized to conduct at least 3AOnly for training and service purposes LVDS51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT ConnectorOnly for training and service purposes LOCAL DIMMINGCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyTHIS IS REVERSE PATTERN POWER BLOCKLEVEL SHIFTER BLOCK Only for training and service purposesT-Con Only for training and service purposesCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyeMMC I/F Don’t Connect Power At VDDIOnly for training and service purposes Just Interal LDO CapacitorCopyright 2013 LG Electronics. Inc. All rights reserved Only for training and service purposesLGE Internal Use Only +24VAMP OPT C5450 10uF 35VOnly for training and service purposes JAPAN TUNER INTERFACEUSE Two serial TS Port for Japan MTK A2 Ball Name Function DEMODTSCLK ExtTSCLK DEMODTSSYNC ExtTSSync DEMODTSDATA0 ExtTsD0Page XXLA64/62/61*-Z XXLN57*-Z Applicable Model Mid-end Platform XXLA74*-Z XXLA71*-Z XXLA69/66*-ZOnly for training and service purposes 2013 LED/LCD TV Engineering guide1. New features 2. Main PCBs 3. Block Diagrams, IIC Map CONTENTInstruction 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’ysMerits EPIEmbedded Point-Point Interface FeaturesEPI Interface HF mini-LVDS TCON EPI Interface mini-LVDS vs. EPIEPI TCON ComparisonEPI Interface mini-LVDS vs. EPI FeaturesHF mini-LVDS TopologyUser Action Area NFC Near field communicationNFC Tag From TV to Smart phoneWIFI/BT Main PCB for BroadbandOnly for training and service purposes xxLA660S-Zx1. LGE2122 Block Diagram 2. LGE 2122 I2C Block Diagram IC105 LGE3.5V 3. Power Block DiagramCI Slot Only for training and service purposesTDSQ G501D Copyright 2013 LG Electronics. Inc. All rights reservedOnly for training and service purposes 5. Video/Audio In Block DiagramJack Side SoC SideOnly for training and service purposes 6. Audio Out Block DiagramCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyHDMI1 Only for training and service purposesHDMI2 HDMI3PMIC Only for training and service purposesLevel Shift TPS65178PMIC 9. PMIC & Level Shift Bloc DiagramLevel Shift TPS65178Motion Remote Receiver Only for training and service purposes4Pin debugging wafer RENESAS MICOMPCBs InterconnectionCables 47LA660S-ZAInterconnection Only for training and service purposesPCBs Cables1. System 2. Remote Buttons 3. MR13 Block Diagram 4. Function List Introductions of 13Y RF ass’y + Magic Remote control5. Pairing/Un-pairing Method Only for training and service purposes Pairing Information Transmission Send to TV after Paired 1. SystemPairing Information Transmission Sequence  Motion Data TransmissionM4 Remote 2. Remote Buttons M4 vs. MR13MR13 Remote repeatPower Management 3. MR13 Block DiagramBluetooth Remote control Bluetooth ReceiverWireless communication 4. Function listBattery Boost up Regulator RF, Gyro, Accelerometer Power SupplyDescription 5. RF Pairing / Un-pairing MethodMethod 1. Wi-Fi built in Ass’y feature 2. Wi-Fi built in Ass’y specification Introductions of 13Y WIFI built in ass’yOnly for training and service purposes Copyright 2013 LG Electronics. Inc. All rights reservedPin map WIFI Built in ass’y featureSwitch SwitchOnly for training and service purposes WIFI Built in ass’y SpecificationCopyright 2013 LG Electronics. Inc. All rights reserved LGE Internal Use Only1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM Widevine & HDCP 2.0 & NETFLXContents Only for training and service purposes1. Widevine?  Netflix 2. HDCP 2.0 & NETFLIX? Why HDCP2.0?  HDCP3. DTCP? As-Was 4. Changed BOMCurrent Changed ItemContents of LCD TV Standard Repair Process Error symptom Contents of LCD TV Standard Repair Process Detail Technical ManualContent PageCheck Power Board 24v output Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D CableCheck Power Board 12v,3.5v etc Replace T-con Board or module And Adjust VCOMOnly for training and service purposes Check various voltages of Power Board3.5V,12V,20V or 24V… Copyright 2013 LG Electronics. Inc. All rights reservedMenu→ Set up→ Support → Signal Test By using Digital signal level meter By using Diagnostics menu on OSDSignal strength Normal over 50% Signal Quality Normal over 50% Check RF Signal levelCheck RF Signal level A. Picture Problem DVB-S/S2LCD TV → Set-Top-Box, Different maker TV etcCheck color by input -External Input COMPONENT A10/ A11※ Check and replace LinkVertical/Horizontal bar, residual image, light spot External device screen error-Color errorReplace Main B/D adjust VCOM A10/ A11Check Power On ‘”High” Check Power LEDMeasure voltage of each output of Power B/D Check ST-BYIf Power Off mode is not displayed Check Power B/D voltage Check Power Off ModePOWEROFFABNORMAL1 POWEROFFCPUABNORMALCheck user menu Speaker off Check audio B+ 24V of Power BoardCheck audio B+ Voltage In case of External Input signal error Check and fix external deviceCheck IR Output signal Check & Repair Cable connection Connector solderCheck 3.5v on Power B/D Replace Power B/D or Replace Main B/D Power B/D don’t have problemError D. Function errorsymptom External device recognition errorIdentify noise type LCD TV Adjust VCOMF. Exterior defect Check S/W Version G. Network ErrorLCD TV  Check SVC Bulletin Check defect CI slot pinError symptom Contents of LCD TV Standard Repair Process Detail Technical ManualContent Continued from previous pageEntry method Standard Repair Process Detail Technical ManualALL MODELS Standard Repair Process Detail Technical Manual 24 Pin Power Board ↔ Main BoardCheck the DC 24V, 12V SMAW200-H24SMENU  support  signal test  select channel A. Video errorVideo error, video lag/stopWhen the signal is strong, use the attenuator -10dB, -15dB, -20dB etc Only for training and service purposes1. Checking method for remote controller for adjustment A. Video errorVideo error, video lag/stopPress the IN-START with the remote controller for adjustment Only for training and service purposesOnly for training and service purposes A. Video error Vertical/Horizontal bar, residualStandard Repair Process Detail Technical Manual image, light spotStandard Repair Process Detail Technical Manual A. Video errorVideo error, video lag/stopALL MODELS Checking methodYou can view 6 types of patterns using the ADJ Key A. Video errorColor errorMODULE error ADD-BAR,SCAN BAR 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 purposesAbnormal Power Section Abnormal Power SectionFuse Open, Abnormal power section Only for training and service purposesOnly for training and service purposes Appendix Exchange LPBLED driverNo Light Dim LightUn-repairable Cases In this case please exchange the module Appendix Exchange the ModulePanel Mura, Light leakage Crosstalk Press damage Panel Mura, Light leakageUn-repairable Cases In this case please exchange the module Appendix Exchange the ModuleFront LOGO LED control in the status of ST-BY Condition Standard Repair Process Detail Technical Manual24 Pin Power Board ↔ Main Board When st-by, only 3.5V is normally onStandard Repair Process Detail Technical Manual For ’10 models, there is no voltage out for st-by purpose24 Pin Power Board ↔ Main Board Check “power on” pin is highChecking method when power is ON Standard Repair Process Detail Technical Manual2. Check the entry into adjustment item 1. Press the IN-START button of the remote controller for adjustmentB. Power error Off when on, off whiling viewing Only for training and service purposes1. Press the MENU button on the remote controller C. Audio errorNo audio/Normal videoOnly for training and service purposes Standard Repair Process Detail Technical Manual24 Pin Power Board ↔ Main Board C. Audio errorNo audio/Normal videoChecking order when there is no audio Standard Repair Process Detail Technical ManualALL MODELS Standard Repair Process Detail Technical Manual③ ④ ② ① LCD module change T-Con board change Standard Repair Process Detail Technical Manual