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