C. Audio errorNo audio/Normal video | LG Electronics 32LA62**-Z*

Checking order when there is no audio

Standard Repair Process Detail Technical Manual

		Error	C. Audio error_No audio/Normal video	Established	2012. 12 .06
	LCD TV	symptom	C. Audio error_No audio/Normal video	date	2012. 12 .06
		symptom		date
		Content	Voltage and speaker checking method	Revised		A25
			Voltage and speaker checking method	Revised
			when there is no audio	date
			when there is no audio	date

<ALL MODELS>

②

24 Pin (Power Board ↔ Main Board)

SMAW200-H24S

	1		Power on	2	Inverter On/off

	3		3.5V	4	PWM Dim #1

	5		3.5V	6	PWM Dim #2

	7	②	GND	8	GND
			24V	10	24V

	11		GND	12	GND

	13		12V	14	12V

	15		12V	16	24V

	17		GND	18	GND

	19		GND	20	GND

	21		GND	22	L/DIMO_VS

	23		L/DIM0_MOSI	24	L/DIM0_SCLK

①

③

Checking order when there is no audio

① Check the contact condition of or 24V connector of Main Board

② Measure the 24V input voltage supplied from Power Board (If there is no input voltage, remove and check the connector)

③Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal, the speaker is normal.

Copyright © 2013 LG Electronics. Inc. All rights reserved.	53 / 88	LGE Internal Use Only
Only for training and service purposes	53 / 88

Image 126

LG Electronics 32LA62**-Z* Standard Repair Process Detail Technical Manual, C. Audio errorNo audio/Normal video

Contents

READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL 32LA62** 32LA62**-ZSERVICE MANUAL LED TV SAFETY PRECAUTIONS CONTENTSCONTENTS SERVICING PRECAUTIONS SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE SERVICING PRECAUTIONS Electrostatically Sensitive ES Devices Small-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Removal 1. Application range SPECIFICATION4. Model General Specification 3. Test method DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s Symbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate 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 7.4. RF Input 3D supported mode automatically 7.2. HDMI Input1.37.3. RF Input3D supported mode manually 7.5. USB Input 3D supported mode manually 7.8. 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 mode 1. Application Range ADJUSTMENT INSTRUCTION3. Automatic Adjustment 2. Designation 3.4. Model name & Serial number Download 3.3. LAN PORT INSPECTIONPING TESTSET PC 3.5. CI+ Key checking method 4. Manual Adjustment 3.6. WIFI MAC ADDRESS CHECK4.1. EDID DATA 4.1.2. 2D EDID 4.2. White Balance Adjustment4.2.4. Adj. Command Protocol 4.2.1. Overview 4.2.5. Adj. method 4.2.6. Reference White balance Adj. coordinate and color temperature4.2.7. ALELF & EDGE LED White balance table 4.3. Local Dimming Function Check 4.4. Magic Motion Remote control test4.6. Wi-Fi Test 4.5. 3D function test 6. Ship-out mode checkIn-stop 7. GND and Internal Pressure check5. Tool Option selection 8. Audio 9. USB S/W DownloadService only After downloading, have to adjust Tool Option again LGE2122 DIAGRAMBLOCK reserved EXPLODED VIEW X-TAL EAX64797001* LD33B EAX64872101* LA33BNVRAM Model Option LGE2122A2M13 PLACE AT JACK SIDEIC105 IC105 LGE2122A2M13 ZD500 PLACE AT JACK SIDE PLACE AT MAIN SOC SIDEPLACE AT IC6000 K4B4G1646B-HCK0 DDR512MBSSIC701 IC703 K4B4G1646B-HCK0 Only for training and service purposes FROM LPB & PSU PANELPOWERPowerDET +5VNormal MICOM MODEL OPTION Renesas MICOMFor Debug GP4 High/MID Power SEQUENCE SIDE HDMI3 JACK HIGH / MID SPDIFSPDIF OUT 2011.11.21 JACKCOMMON AV/COMPONENT REAR UART FOR DEBUG AR4100 MAX 0.4AMREMOTE&WIFIWAFER 1/16W USB3 MAX 1.5A OCP USB2/3USB2 MAX 1.5A IC4306 MAX 1.5A USB1OCP USB1 IC4500 SCART GENDER Full Scart18 Pin GenderJK4600 2011.10.26 Ethernet Block LANVERTICAL2012.03.08 0x54 AMPMUTEPWRDET SCART AUDIO MUTE IC6000AZ4580MTR-E1 EARPHONE AMP 18pF HEADPHONE AMP2011.09.29 CI POWER ENABLE CONTROL CI SLOT2011.10.31 TDA8024TT B-CAS SMART CARD INTERFACE+3.3VNORMAL +5VNORMAL Vout=0.6*1+R1/R2 TU6602 TU6600TU6601 TDSS-G501DB RS-232C Control INTERFACE JP6800JP6801 Input trace widths should be sized to conduct at least 3A DVB-S2 LNB Part AllegroOptionLNB Ouput trace widths should be sized to conduct at least 2A 41Pin LVDS OUTPUT Connector LVDS51Pin LVDS OUTPUT Connector LVDSHIGHMID R7601 10K L/DIMOUT8P L/DIM0SCLKPWR L/DIM0MOSIPWR R7603 LOCAL DIMMINGP7600 12507WR-08L L/DIMOUT8P I2CSCL1 L/DIMOUT8P R7602 LEVEL SHIFTER BLOCK POWER BLOCKTHIS IS REVERSE PATTERN T-Con Copyright 2013 LG Electronics. Inc. All rights reserved Just Interal LDO Capacitor Don’t Connect Power At VDDIeMMC I/F EMMC +24VAMP OPT C5450 10uF 35V DEMODTSCLK ExtTSCLK DEMODTSSYNC ExtTSSync DEMODTSDATA0 ExtTsD0 JAPAN TUNER INTERFACEUSE Two serial TS Port for Japan MTK A2 Ball Name Function DEMODTSVAL ExtTsVAL DEMODTSDATA1 EXT2TsCLK DEMODTSDATA3 EXT2TSSyncPage Applicable Model Mid-end Platform XXLA74*-Z XXLA71*-Z XXLA69/66*-Z XXLA64/62/61*-Z XXLN57*-Z2013 LED/LCD TV Engineering guide Instruction 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’ys EPIEmbedded Point-Point Interface Features EPI InterfaceMerits EPI TCON EPI Interface mini-LVDS vs. EPIHF mini-LVDS TCON Comparison Topology FeaturesHF mini-LVDS Protocol NFC Tag NFC Near field communicationUser Action Area From TV to Smart phone xxLA660S-Zx Main PCB for BroadbandWIFI/BT Chassis LD33B 1. LGE2122 Block Diagram IC105 LGE 2. LGE 2122 I2C Block Diagram 3. Power Block Diagram 3.5V CI Slot TDSQ G501D 5. Video/Audio In Block Diagram Jack SideSoC Side 6. Audio Out Block Diagram Tuner HDMI3 HDMI1HDMI2 RENESAS WOLCTL MICOM TPS65178 PMICLevel Shift TPS65198 9. PMIC & Level Shift Bloc Diagram RENESAS MICOM Motion Remote Receiver4Pin debugging wafer USBDM1 USBDP1 /USBOCD1 USBCTL1 Cables InterconnectionPCBs 47LA660S-ZA 6 IR Assy 7 IR to Local Key 3Pin Cable 8 IR to Logo Assy 4Pin Cable Introductions of 13Y RF ass’y + Magic Remote control 1. System 2. Remote Buttons 3. MR13 Block Diagram 4. Function List5. Pairing/Un-pairing Method Pairing Information Transmission Sequence 1. System Pairing Information Transmission Send to TV after Paired  Motion Data Transmission MR13 Remote 2. Remote Buttons M4 vs. MR13M4 Remote repeat Bluetooth Remote control 3. MR13 Block DiagramPower Management Bluetooth Receiver Battery Boost up Regulator 4. Function listWireless communication RF, Gyro, Accelerometer Power Supply 5. RF Pairing / Un-pairing Method MethodDescription Introductions of 13Y WIFI built in ass’y 1. Wi-Fi built in Ass’y feature 2. Wi-Fi built in Ass’y specification Switch WIFI Built in ass’y featurePin map Wafer WIFI Built in ass’y Specification Contents Widevine & HDCP 2.0 & NETFLX1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM 2012. 12 1. Widevine?  Why HDCP2.0? 2. HDCP 2.0 & NETFLIX? Netflix  HDCP 3. DTCP? Current 4. Changed BOMAs-Was Changed Item Contents of LCD TV Standard Repair Process Content Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom Page Check 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 VCOM Check various voltages of Power Board 3.5V,12V,20V or 24V… Signal 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 level A. Picture Problem DVB-S/S2 → Set-Top-Box, Different maker TV etc ※ Check and A10/ A11Check color by input -External Input COMPONENT replace Link Replace Main B/D adjust VCOM External device screen error-Color errorVertical/Horizontal bar, residual image, light spot A10/ A11 Measure voltage of each output of Power B/D Check Power LEDCheck Power On ‘”High” Check ST-BY POWEROFFABNORMAL1 Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage 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 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 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 Standard Repair Process Detail Technical Manual ALL MODELSEntry method 24 Pin Power Board ↔ Main Board Check the DC 24V, 12VSMAW200-H24S A. Video errorVideo error, video lag/stop MENU  support  signal test  select channelWhen the signal is strong, use the attenuator -10dB, -15dB, -20dB etc Version 1. Checking method for remote controller for adjustmentPress the IN-START with the remote controller for adjustment ALL MODELS A. Video error Vertical/Horizontal bar, residual image, light spot Checking method MODULE 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/D Solder defect, CNT Broken Appendix Exchange EPI Cable or Main B/DAbnormal Power Section Solder defect, Short/Crack GRADATION Fuse Open, Abnormal power sectionAbnormal Display Noise Appendix Exchange LPBLED driver No LightDim Light Panel Mura, Light leakage Crosstalk Press damage Appendix Exchange the ModuleUn-repairable Cases In this case please exchange the module 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 B. 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 Entry method 2. Select the SOUND function of the Menu C. Audio errorNo audio/Normal video1. Press the MENU button on the remote controller 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