47LM761S/761T 47LM761S/761T-ZA 47LM765S/765T 47LM765S/765T-ZD
MODEL 47LM760S/760T 47LM760S/760T-ZB
SERVICE MANUAL
LED LCD TV
LG Electronics. Inc. All rights reserved
CONTENTS
Only for training and service purposes
Copyright
Leakage Current Cold CheckAntenna Cold Check
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Before returning the receiver to the customer
Electrostatically Sensitive ES Devices
SERVICING PRECAUTIONS
Removal
IC Remove/Replacement
Replacement
Small-Signal Discrete Transistor Removal/Replacement
2. Requirement for Test
SPECIFICATION
4. Model General Specification
1. Application range
DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s
Symbolrate
4.0Msymbols/s to 7.2Msymbols/s
symbolrate
6. RGB input PC
5. Component Video Input Y, Cb/Pb, Cr/Pr
7.2. PC mode
7. HDMI Input 7.1. DTV mode
2. Designation
ADJUSTMENT INSTRUCTION
3. Automatic Adjustment
1. Application Range
3.3. LAN
3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L
3.4. LAN PORT INSPECTIONPING TEST
SET PC
3.5.1. Model name & Serial number D/L
3.7. WIFI MAC ADDRESS CHECK
3.5. Model name & Serial number Download
3.6. CI+ Key checking method
4.1.3. Download method
4. Manual Adjustment
4.1.1. Overview
4.1.2. Equipment
4.2.2. Equipment
4.2. White Balance Adjustment
4.2.4. Adj. Command Protocol
4.2.1. Overview
4.2.7. LED White balance table
4.5. Magic Motion Remote control test
4.3. EYE-Q function check
4.4. Local Dimming Function Check
4.9. Option selection per country
4.7. Wi-Fi Test
4.6. 3D function test
4.8. LNB voltage and 22KHz tone check
5. Audio
6. USB S/W DownloadService only
4.12. GND and Internal Pressure check
HDMI
BLOCK DIAGRAM
Side
Rear
EXPLODED VIEW
JTAG 10K
EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22
NVRAM
X-TAL
Place at JACK SIDE
PLACE AT JACK SIDE
PLACE AT JACK SIDE
12.5TGASKITSMDUSB1
SMD Gaskit
12.5TGASKITSMDUSB3
PLACE AT MAIN SOC SIDE
PLACE AT JACK SIDE
PLACE AT IC6000
IC105 LGE2112
IC701 H5TQ2G63BFR-PBC
IC703
H5TQ2G63BFR-PBC
Copyright 2012 LG Electronics. Inc. All rights reserved
On-semi
FROM LIPS & POWER B/D
PowerDET
PANELPOWER
Eye Sensor Option
Renesas MICOM
For Debug
MICOM MODEL OPTION
UI HDMI2
HDMI1
UI HDMI3
HDMI4
JK3603 SLIM-15F-D-2
RGB/ PC AUDIO/ SPDIF
SPDIF OUT
PC AUDIO
JACKCOMMON
ESD for MTK
CVBS 1 PHONE JACK
RS232C
COMPONENT 1 PHONE JACK
RGB Sensor
IR & KEY
Zener Diode is
close to wafer
USB2 MAX 1.5A
USBWIFI
+5VUSB FOR USB1
USB1
SCART GENDER
Full Scart18 Pin Gender
2011.10.26
1/16W
ZigBeeRadio Pulse MREMOTE OPTION
ALL MREMOTE OPTION
AR4800
Ethernet Block
2011.11.21
IC5800
STA380BW
GP4MT5369
A Z4580MTR-E1
SCART AUDIO MUTE
AUDOUT EU/CHINAHOTELOPT
IC6000
HEADPHONE AMP
EARPHONE AMP
Option FOR LG1152
Option FOR MTK
TU6501
T/C/S & H/NIM & T2/C TUNEREU & CHINA
Vout=0.6*1+R1/R2
TU6500
DCDCGND and AGND are connected in pin#27
OptionLNB
DVB-S2 LNB Part Allegro
DCDCGND and AGND are connected
COMMERCIALOPTION
AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACK
FOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12V
FOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP
2011.08.11
LVDS
51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT Connector
LVDSHIGHMID
AR7600
LOCAL DIMMING
L/DIMOUT
T-Con
POWER BLOCK
THIS IS REVERSE PATTERN
LEVEL SHIFTER BLOCK
Just Interal LDO Capacitor
Don’t Connect Power At VDDI
eMMC I/F
HYNIXEMMC2GB
LOGOLIGHT R8901 10K
Place Near Micom
Page
2012 LED/LCD TV Engineering guide
Applicable Model XXLM760S-ZB
Adjust way of new features widevine… Repair guide
CONTENT
New features Main PCBs Block Diagrams, IIC Map
Instruction of new sub ass’ys How to use tool Download
EPI Interface
EPIEmbedded Point-Point Interface Features
Merits
What to change
EPI Interface mini-LVDS vs. EPI
HF mini-LVDS TCON
Comparison
HF mini-LVDS
Chassis LD22E PCB P/No EAX64307905
Main PCB for Broadband
WIFI
xxLM760S-ZB
Rear
MTK5369 Block Diagram LM76
Power load
Side
IC6100
Jack Interface
Main SoC MTK
Full Scart18 Pin Gender
R 47옴
GP4 Backend block diagram EPI & T-con
R0 옴
50Pin
GP4 Backend block diagram EPI & T-Con
EPI CH1/2/3
EPI CH4/5/6
LVDSSEL “H”=JEIDA, “L” or NC=VESA LGD
GP4 Backend block diagram LVDS Tx & Local Dimming
LVDS Tx Block
Dual-link LVDS Output
xxLM760S-ZA
Interconnection
PCBs
Cables
KEY1, KEY2 Voltage
Circuit Block Diagram
Ass’y Picture Pin Configuration
2012Y IR + Soft touch PCB Pinmap
2012Y IR + Soft Touch LED Lighting Scenario
Power LED Scenario
Spec 내용
Manual of Touch Sensitivity
Introductions of GP4 Sensor Touch IC
Touch Key Threshold Level Ta = 25ºC
Addr Value
Touch EEPROM Register change with USB port
Introductions of 12Y RF ass’y + Magic Remote control
™ Motion Data Transmission
1. System
™ Pairing Information Transmission Send to TV after Paired
Pairing Information Transmission Sequence
← ok →
power
mute
home
Connector
3. M4 Block Diagram
AA x 2 Battery
Power Management
Function
4. Function list
주요 Item
Manufacturer
Method
5. RF Pairing / Un-pairing Method
Description
Introductions of 12Y WIFI built in ass’y
WIFI built in feature
WIFI Built in ass’y featureLGIT
Block diagram
Pin map
WIFI Built in Block-diagramArcadyan
WIFI Built in ass’y Specification
1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM
12Y Widevine & HDCP 2.0 & NETFLX
1. Widevine?
‰ HDCP
2. HDCP 2.0 & NETFLIX?
‰ Netflix
‰ Why HDCP2.0?
3. DTCP?
Æ 추가
4. Changed BOM
As-Was
Current
LGE Internal Use Only
Contents of LCD TV Standard Repair Process
Page
Contents of LCD TV Standard Repair Process Detail Technical Manual
Error symptom
Content
Replace T-con Board or module And Adjust VCOM
Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable
A2 Check Power Board 24v output
Check Power Board 12v,3.5v etc
Normal Y voltage?
Check various voltages of Power Board
Revised date
3.5V,12V,20V or 24V…
Check
Check RF Signal level
S/W Version
Check S/W Version
※ Check and
Color error?
A10/ A11
Check color by input -External Input COMPONENT -RGB
External Input error Component error RGB error HDMI DVI
External device screen error-Color error
Vertical/Horizontal bar, residual image, light spot
Replace Main B/D adjust VCOM
Measure voltage of each output of Power B/D
Check Power LED
Power LED Y On?
Check Power On ‘”High”
Power off List
Error?
Check Power Off Mode
If Power Off mode is not displayed Check Power B/D voltage
Normal
of Power Board
Check user menu Speaker off
Check audio B+
Check audio B+ Voltage
In case of External Input signal error Check and fix external device
Power B/D don’t have problem
Check & Repair Cable connection Connector solder
Check IR Output signal
Check 3.5v on Power B/D Replace Power B/D or Replace Main B/D
External Input and
Recognition error
accordance
Identify nose type
F. Exterior defect
Adjust VCOM
Page
ALL MODELS
Standard Repair Process Detail Technical Manual
Edge LED
24 Pin Power Board ↔ Main Board
SMAW200-H24S YEONHO
date
1. Checking method for remote controller for adjustment
date
Checking method
date
Appendix Exchange T-Con Board
Noise
Fuse Open, Abnormal power section
Abnormal Display
GRADATION
No picture/Sound Ok
Appendix Exchange PSULED driver
No Light
Dim Light
Un-repairable Cases In this case please exchange the module
Appendix Exchange the Module
Un-repairable Cases In this case please exchange the module
Appendix Exchange the Module
date
For ’10 models, there is no voltage out for st-by purpose
When st-by, only 3.5V is normally on
Edge LED Edge LED
Check “power on” pin is high
B. Power error Off when on, off whiling viewing
date
Only for training and service purposes
Standard Repair Process Detail Technical Manual
ALL MODELS
ALL MODELS
Standard Repair Process Detail Technical Manual
ALL MODELS
LCD module change T-Con board change