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