Error symptom, Content, Page | LG Electronics 32LM640S/640T-ZA

Contents of LCD TV Standard Repair Process Detail Technical Manual

Continued from previous page

No.	Error symptom	Content	Page	Remarks

21		Check front display LED	A17

22		Check power input Voltage & ST-BY 5V	A18

23	B. Power error_No power	Checking method when power is ON	A19

24		POWER BOARD voltage measuring method	A4

25

26	B. Power error_Off when on, off while	POWER OFF MODE checking method	A22
26	viewing	POWER OFF MODE checking method	A22
	viewing

27	B. Power error_Off when on, off while	POWER BOARD PIN voltage checking method	A19
27	viewing	POWER BOARD PIN voltage checking method	A19
	viewing

28		Checking method in menu when there is no	A24
28		audio	A24
	C. Audio error_No audio/Normal video	audio

29		Voltage and speaker checking method when	A25
		Voltage and speaker checking method when
		there is no audio
		there is no audio

30	C. Audio error_Wrecked	Voltage and speaker checking method in	A25
30	audio/discontinuation	case of audio error	A25
	audio/discontinuation	case of audio error

31	D. Function error_ No response in	Remote controller operation checking method	A27
31	remote controller, key error	Remote controller operation checking method	A27
	remote controller, key error

32	D. VCOM Adjustment	Sequence of the Vcom adjustment	A28

Copyright © 2012 LG Electronics. Inc. All rights reserved.	LGE Internal Use Only
Only for training and service purposes

Image 98

LG Electronics 32LM640S/640T-ZA Contents of LCD TV Standard Repair Process Detail Technical Manual, Error symptom, Page

Contents

SERVICE MANUAL MODEL 32LM640S/640T32LM640S/640T-ZA LED LCD TV Copyright CONTENTSOnly for training and service purposes LG Electronics. Inc. All rights reserved Before returning the receiver to the customer SAFETY PRECAUTIONSIMPORTANT SAFETY NOTICE Leakage Current Cold CheckAntenna Cold Check SERVICING PRECAUTIONS Electrostatically Sensitive ES Devices Small-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Removal 1. Application range SPECIFICATION4. Model General Specification 2. Requirement for Test symbolrate Symbolrate4.0Msymbols/s to 7.2Msymbols/s DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s 5. Component Video Input Y, Cb/Pb, Cr/Pr 6. RGB input PC 7. HDMI Input 7.1. DTV mode 7.2. PC mode 1. Application Range ADJUSTMENT INSTRUCTION3. Automatic Adjustment 2. Designation SET PC 3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L3.4. LAN PORT INSPECTIONPING TEST 3.3. LAN 3.6. CI+ Key checking method 3.7. WIFI MAC ADDRESS CHECK3.5. Model name & Serial number Download 3.5.1. Model name & Serial number D/L 4.1.2. Equipment 4. Manual Adjustment4.1.1. Overview 4.1.3. Download method 4.2.1. Overview 4.2. White Balance Adjustment4.2.4. Adj. Command Protocol 4.2.2. Equipment 4.4. Local Dimming Function Check 4.5. Magic Motion Remote control test4.3. EYE-Q function check 4.2.7. LED White balance table 4.8. LNB voltage and 22KHz tone check 4.7. Wi-Fi Test4.6. 3D function test 4.9. Option selection per country 4.12. GND and Internal Pressure check 6. USB S/W DownloadService only5. Audio Rear BLOCK DIAGRAMSide HDMI EXPLODED VIEW IMPORTANT SAFETY NOTICE X-TAL EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22NVRAM JTAG 10K PLACE AT JACK SIDE PLACE AT JACK SIDEPlace at JACK SIDE 12.5TGASKITSMDUSB3 SMD Gaskit12.5TGASKITSMDUSB1 PLACE AT IC6000 PLACE AT JACK SIDEPLACE AT MAIN SOC SIDE H5TQ2G63BFR-PBC IC701 H5TQ2G63BFR-PBCIC703 IC105 LGE2112 LGE Internal Use Only PANELPOWER FROM LIPS & POWER B/DPowerDET On-semi MICOM MODEL OPTION Renesas MICOMFor Debug Eye Sensor Option HDMI4 HDMI1UI HDMI3 UI HDMI2 PC AUDIO RGB/ PC AUDIO/ SPDIFSPDIF OUT JK3603 SLIM-15F-D-2 ESD for MTK JACKCOMMON COMPONENT 1 PHONE JACK RS232CCVBS 1 PHONE JACK close to wafer IR & KEYZener Diode is RGB Sensor USB1 USBWIFI+5VUSB FOR USB1 USB2 MAX 1.5A 2011.10.26 Full Scart18 Pin GenderSCART GENDER AR4800 ZigBeeRadio Pulse MREMOTE OPTIONALL MREMOTE OPTION 1/16W Ethernet Block GP4MT5369 IC5800STA380BW 2011.11.21 IC6000 SCART AUDIO MUTEAUDOUT EU/CHINAHOTELOPT A Z4580MTR-E1 EARPHONE AMP HEADPHONE AMP Option FOR MTK Option FOR LG1152 TU6500 T/C/S & H/NIM & T2/C TUNEREU & CHINAVout=0.6*1+R1/R2 TU6501 DCDCGND and AGND are connected OptionLNBDVB-S2 LNB Part Allegro DCDCGND and AGND are connected in pin#27 FOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACKFOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12V COMMERCIALOPTION LVDSHIGHMID LVDS51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT Connector 2011.08.11 L/DIMOUT LOCAL DIMMINGAR7600 LEVEL SHIFTER BLOCK POWER BLOCKTHIS IS REVERSE PATTERN T-Con HYNIXEMMC2GB Don’t Connect Power At VDDIeMMC I/F Just Interal LDO Capacitor Place Near Micom LOGOLIGHT R8901 10KPage Applicable Model XXLM760S-ZB 2012 LED/LCD TV Engineering guide Instruction of new sub ass’ys How to use tool Download CONTENTNew features Main PCBs Block Diagrams, IIC Map Adjust way of new features widevine… Repair guide Merits EPIEmbedded Point-Point Interface FeaturesEPI Interface Comparison EPI Interface mini-LVDS vs. EPIHF mini-LVDS TCON What to change HF mini-LVDS xxLM760S-ZB Main PCB for BroadbandWIFI Chassis LD22E PCB P/No EAX64307905 Side MTK5369 Block Diagram LM76Power load Rear Full Scart18 Pin Gender Jack InterfaceMain SoC MTK IC6100 R0 옴 GP4 Backend block diagram EPI & T-conR 47옴 EPI CH4/5/6 GP4 Backend block diagram EPI & T-ConEPI CH1/2/3 50Pin Dual-link LVDS Output GP4 Backend block diagram LVDS Tx & Local DimmingLVDS Tx Block LVDSSEL “H”=JEIDA, “L” or NC=VESA LGD Cables InterconnectionPCBs xxLM760S-ZA 2012Y IR + Soft touch PCB Pinmap Circuit Block DiagramAss’y Picture Pin Configuration KEY1, KEY2 Voltage Spec 내용 Power LED Scenario2012Y IR + Soft Touch LED Lighting Scenario Touch Key Threshold Level Ta = 25ºC Introductions of GP4 Sensor Touch ICManual of Touch Sensitivity Touch EEPROM Register change with USB port Addr Value Introductions of 12Y RF ass’y + Magic Remote control Pairing Information Transmission Sequence 1. System™ Pairing Information Transmission Send to TV after Paired ™ Motion Data Transmission home powermute ← ok → Power Management 3. M4 Block DiagramAA x 2 Battery Connector Manufacturer 4. Function list주요 Item Function Description 5. RF Pairing / Un-pairing MethodMethod Introductions of 12Y WIFI built in ass’y Pin map WIFI Built in ass’y featureLGITBlock diagram WIFI built in feature WIFI Built in Block-diagramArcadyan WIFI Built in ass’y Specification 12Y Widevine & HDCP 2.0 & NETFLX 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM 1. Widevine? ‰ Why HDCP2.0? 2. HDCP 2.0 & NETFLIX?‰ Netflix ‰ HDCP 3. DTCP? Current 4. Changed BOMAs-Was Æ 추가 Copyright 2012 LG Electronics. Inc. All rights reserved 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 CableA2 Check Power Board 24v output Replace T-con Board or module And Adjust VCOM 3.5V,12V,20V or 24V… Check various voltages of Power BoardRevised date Normal Y voltage? S/W Version Check RF Signal levelCheck Check S/W Version Check color by input -External Input COMPONENT -RGB Color error?A10/ A11 ※ Check and Replace Main B/D adjust VCOM External device screen error-Color errorVertical/Horizontal bar, residual image, light spot External Input error Component error RGB error HDMI DVI Check Power On ‘”High” Check Power LEDPower LED Y On? Measure voltage of each output of Power B/D If Power Off mode is not displayed Check Power B/D voltage Error?Check Power Off Mode Power off List Check audio B+ of Power BoardCheck user menu Speaker off Normal 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 accordance Recognition errorExternal Input and Identify nose type Adjust VCOM F. Exterior defect Content Standard Repair Process Detail Technical Manual ALL MODELS SMAW200-H24S YEONHO 24 Pin Power Board ↔ Main BoardEdge LED ALL MODELS 1. Checking method for remote controller for adjustment ALL MODELS Checking method date Appendix Exchange T-Con Board GRADATION Fuse Open, Abnormal power sectionAbnormal Display Noise Dim Light Appendix Exchange PSULED driverNo Light No picture/Sound Ok Appendix Exchange the Module Un-repairable Cases In this case please exchange the module Appendix Exchange the Module Un-repairable Cases In this case please exchange the module date Edge LED Edge LED When st-by, only 3.5V is normally onFor ’10 models, there is no voltage out for st-by purpose Check “power on” pin is high B. Power error Off when on, off whiling viewing ALL MODELS Only for training and service purposesStandard Repair Process Detail Technical Manual date Standard Repair Process Detail Technical Manual ALL MODELS Standard Repair Process Detail Technical Manual LCD module change T-Con board change