Check audio B+ Voltage | LG Electronics 32LA62**-Z* instruction

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

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Only for training and service purposes	28 / 88

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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 TV CONTENTS CONTENTSSAFETY PRECAUTIONS SERVICING PRECAUTIONS IMPORTANT SAFETY NOTICE SAFETY PRECAUTIONS Electrostatically Sensitive ES Devices SERVICING PRECAUTIONS Replacement IC Remove/ReplacementSmall-Signal Discrete Transistor Removal/Replacement Removal 4. Model General Specification SPECIFICATION1. Application range 3. Test method symbolrate Symbolrate 4.0Msymbols/s to 7.2Msymbols/sDVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s DVB-S QPSK 2 ~ 45Msymbol/s 5. Component Video Input Y, Pb, Pr 6.2. PC mode 6. HDMI Input 6.1. DTV mode 7.1. HDMI 1.4b 3D supported mode automatically 7.3. RF Input3D supported mode manually 7.2. HDMI Input1.37.4. RF Input 3D supported mode automatically 7.5. USB Input 3D supported mode manually 7.7. 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 mode 3. Automatic Adjustment ADJUSTMENT INSTRUCTION1. Application Range 2. Designation SET PC 3.3. LAN PORT INSPECTIONPING TEST3.4. Model name & Serial number Download 3.5. CI+ Key checking method 4.1. EDID DATA 4. Manual Adjustment3.6. WIFI MAC ADDRESS CHECK 4.2.4. Adj. Command Protocol 4.2. White Balance Adjustment4.1.2. 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 4.6. Wi-Fi Test 4.4. Magic Motion Remote control test4.3. Local Dimming Function Check 4.5. 3D function test 5. Tool Option selection 7. GND and Internal Pressure check6. Ship-out mode checkIn-stop 8. Audio After downloading, have to adjust Tool Option again 9. USB S/W DownloadService only BLOCK DIAGRAMLGE2122 reserved EXPLODED VIEW NVRAM EAX64797001* LD33B EAX64872101* LA33BX-TAL Model Option IC105 PLACE AT JACK SIDELGE2122A2M13 IC105 LGE2122A2M13 ZD500 PLACE AT IC6000 PLACE AT JACK SIDEPLACE AT MAIN SOC SIDE IC701 DDR512MBSSK4B4G1646B-HCK0 IC703 K4B4G1646B-HCK0 LGE Internal Use Only PowerDET PANELPOWERFROM LPB & PSU +5VNormal For Debug Renesas MICOMMICOM MODEL OPTION GP4 High/MID Power SEQUENCE HDMI3 SIDE SPDIF OUT SPDIFJACK HIGH / MID 2011.11.21 JACKCOMMON UART FOR DEBUG AV/COMPONENT REAR MREMOTE&WIFIWAFER MAX 0.4AAR4100 1/16W USB2 MAX 1.5A OCP USB2/3USB3 MAX 1.5A IC4306 OCP USB1 USB1MAX 1.5A IC4500 JK4600 Full Scart18 Pin GenderSCART GENDER 2011.10.26 2012.03.08 Ethernet BlockLANVERTICAL AMPMUTEPWRDET 0x54 AZ4580MTR-E1 SCART AUDIO MUTEIC6000 2011.09.29 EARPHONE AMP 18pFHEADPHONE AMP 2011.10.31 CI POWER ENABLE CONTROLCI SLOT +3.3VNORMAL B-CAS SMART CARD INTERFACETDA8024TT +5VNORMAL Vout=0.6*1+R1/R2 TU6601 TU6600TU6602 TDSS-G501DB JP6801 RS-232C Control INTERFACEJP6800 OptionLNB DVB-S2 LNB Part AllegroInput trace widths should be sized to conduct at least 3A Ouput trace widths should be sized to conduct at least 2A 51Pin LVDS OUTPUT Connector LVDS41Pin LVDS OUTPUT Connector LVDSHIGHMID P7600 12507WR-08L L/DIMOUT8P LOCAL DIMMINGR7601 10K L/DIMOUT8P L/DIM0SCLKPWR L/DIM0MOSIPWR R7603 I2CSCL1 L/DIMOUT8P R7602 THIS IS REVERSE PATTERN POWER BLOCKLEVEL SHIFTER BLOCK T-Con T-Con eMMC I/F Don’t Connect Power At VDDIJust Interal LDO Capacitor EMMC +24VAMP OPT C5450 10uF 35V USE Two serial TS Port for Japan MTK A2 Ball Name Function JAPAN TUNER INTERFACEDEMODTSCLK 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 1. 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’ys Merits EPIEmbedded Point-Point Interface FeaturesEPI Interface HF mini-LVDS TCON EPI Interface mini-LVDS vs. EPIEPI TCON Comparison HF mini-LVDS FeaturesTopology Protocol User Action Area NFC Near field communicationNFC Tag From TV to Smart phone WIFI/BT Main PCB for BroadbandxxLA660S-Zx Chassis LD33B 1. LGE2122 Block Diagram 2. LGE 2122 I2C Block Diagram IC105 LGE 3.5V 3. Power Block Diagram TDSQ G501D CI Slot SoC Side 5. Video/Audio In Block DiagramJack Side Tuner 6. Audio Out Block Diagram HDMI2 HDMI1HDMI3 RENESAS WOLCTL MICOM Level Shift PMICTPS65178 TPS65198 9. PMIC & Level Shift Bloc Diagram 4Pin debugging wafer Motion Remote ReceiverRENESAS MICOM USBDM1 USBDP1 /USBOCD1 USBCTL1 PCBs InterconnectionCables 47LA660S-ZA 7 IR to Local Key 3Pin Cable 8 IR to Logo Assy 4Pin Cable 6 IR Assy 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  Pairing Information Transmission Send to TV after Paired 1. SystemPairing Information Transmission Sequence  Motion Data Transmission M4 Remote 2. Remote Buttons M4 vs. MR13MR13 Remote repeat Power Management 3. MR13 Block DiagramBluetooth Remote control Bluetooth Receiver Wireless communication 4. Function listBattery Boost up Regulator RF, Gyro, Accelerometer Power Supply Description 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’y Pin map WIFI Built in ass’y featureSwitch Wafer WIFI Built in ass’y Specification 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM Widevine & HDCP 2.0 & NETFLXContents 2012. 12 1. Widevine?  Netflix 2. HDCP 2.0 & NETFLIX? Why HDCP2.0?  HDCP 3. DTCP? As-Was 4. Changed BOMCurrent Changed Item Contents of LCD TV Standard Repair Process Error symptom Contents of LCD TV Standard Repair Process Detail Technical ManualContent Page Check 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 VCOM 3.5V,12V,20V or 24V… Check various voltages of Power Board Menu→ 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 level → Set-Top-Box, Different maker TV etc A. Picture Problem DVB-S/S2 Check color by input -External Input COMPONENT A10/ A11※ Check and replace Link Vertical/Horizontal bar, residual image, light spot External device screen error-Color errorReplace Main B/D adjust VCOM A10/ A11 Check Power On ‘”High” Check Power LEDMeasure voltage of each output of Power B/D Check ST-BY If Power Off mode is not displayed Check Power B/D voltage Check Power Off ModePOWEROFFABNORMAL1 POWEROFFCPUABNORMAL Check user menu Speaker off Check audio B+ 24V of Power Board Check audio B+ Voltage In case of External Input signal error Check and fix external device Check 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 problem External device recognition error D. Function error Identify noise type F. Exterior defect Adjust VCOM G. Network Error  Check SVC Bulletin Check defect CI slot pin 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 Press the IN-START with the remote controller for adjustment 1. Checking method for remote controller for adjustmentVersion ALL MODELS image, light spot A. Video error Vertical/Horizontal bar, residual Checking method You 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/D Abnormal Power Section Appendix Exchange EPI Cable or Main B/DSolder defect, CNT Broken Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power sectionGRADATION Noise Dim Light Appendix Exchange LPBLED driverNo Light Un-repairable Cases In this case please exchange the module Appendix Exchange the ModulePanel Mura, Light leakage Crosstalk Press damage Panel Mura, Light leakage Un-repairable Cases In this case please exchange the module Front LOGO LED control in the status of ST-BY Condition For ’10 models, there is no voltage out for st-by purpose When st-by, only 3.5V is normally on Checking method when power is ON Check “power on” pin is high 2. 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 Entry method 1. Press the MENU button on the remote controller C. Audio errorNo audio/Normal video2. 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