SERVICE MANUAL
MODEL 32LM640S/640T
32LM640S/640T-ZA
LED LCD TV
Copyright
CONTENTS
Only for training and service purposes
LG Electronics. Inc. All rights reserved
Before returning the receiver to the customer
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Leakage Current Cold CheckAntenna Cold Check
SERVICING PRECAUTIONS
Electrostatically Sensitive ES Devices
Small-Signal Discrete Transistor Removal/Replacement
IC Remove/Replacement
Replacement
Removal
1. Application range
SPECIFICATION
4. Model General Specification
2. Requirement for Test
symbolrate
Symbolrate
4.0Msymbols/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 INSTRUCTION
3. Automatic Adjustment
2. Designation
SET PC
3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L
3.4. LAN PORT INSPECTIONPING TEST
3.3. LAN
3.6. CI+ Key checking method
3.7. WIFI MAC ADDRESS CHECK
3.5. Model name & Serial number Download
3.5.1. Model name & Serial number D/L
4.1.2. Equipment
4. Manual Adjustment
4.1.1. Overview
4.1.3. Download method
4.2.1. Overview
4.2. White Balance Adjustment
4.2.4. Adj. Command Protocol
4.2.2. Equipment
4.4. Local Dimming Function Check
4.5. Magic Motion Remote control test
4.3. EYE-Q function check
4.2.7. LED White balance table
4.8. LNB voltage and 22KHz tone check
4.7. Wi-Fi Test
4.6. 3D function test
4.9. Option selection per country
5. Audio
6. USB S/W DownloadService only
4.12. GND and Internal Pressure check
Rear
BLOCK DIAGRAM
Side
HDMI
EXPLODED VIEW
IMPORTANT SAFETY NOTICE
X-TAL
EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22
NVRAM
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
H5TQ2G63BFR-PBC
IC701 H5TQ2G63BFR-PBC
IC703
IC105 LGE2112
Copyright 2012 LG Electronics. Inc. All rights reserved
PANELPOWER
FROM LIPS & POWER B/D
PowerDET
On-semi
MICOM MODEL OPTION
Renesas MICOM
For Debug
Eye Sensor Option
HDMI4
HDMI1
UI HDMI3
UI HDMI2
PC AUDIO
RGB/ PC AUDIO/ SPDIF
SPDIF OUT
JK3603 SLIM-15F-D-2
ESD for MTK
JACKCOMMON
CVBS 1 PHONE JACK
RS232C
COMPONENT 1 PHONE JACK
close to wafer
IR & KEY
Zener Diode is
RGB Sensor
USB1
USBWIFI
+5VUSB FOR USB1
USB2 MAX 1.5A
SCART GENDER
Full Scart18 Pin Gender
2011.10.26
AR4800
ZigBeeRadio Pulse MREMOTE OPTION
ALL MREMOTE OPTION
1/16W
Ethernet Block
GP4MT5369
IC5800
STA380BW
2011.11.21
IC6000
SCART AUDIO MUTE
AUDOUT EU/CHINAHOTELOPT
A Z4580MTR-E1
EARPHONE AMP
HEADPHONE AMP
Option FOR MTK
Option FOR LG1152
TU6500
T/C/S & H/NIM & T2/C TUNEREU & CHINA
Vout=0.6*1+R1/R2
TU6501
DCDCGND and AGND are connected
OptionLNB
DVB-S2 LNB Part Allegro
DCDCGND and AGND are connected in pin#27
FOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP
AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACK
FOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12V
COMMERCIALOPTION
LVDSHIGHMID
LVDS
51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT Connector
2011.08.11
AR7600
LOCAL DIMMING
L/DIMOUT
LEVEL SHIFTER BLOCK
POWER BLOCK
THIS IS REVERSE PATTERN
T-Con
HYNIXEMMC2GB
Don’t Connect Power At VDDI
eMMC I/F
Just Interal LDO Capacitor
Place Near Micom
LOGOLIGHT R8901 10K
Page
Applicable Model XXLM760S-ZB
2012 LED/LCD TV Engineering guide
Instruction of new sub ass’ys How to use tool Download
CONTENT
New features Main PCBs Block Diagrams, IIC Map
Adjust way of new features widevine… Repair guide
EPI Interface
EPIEmbedded Point-Point Interface Features
Merits
Comparison
EPI Interface mini-LVDS vs. EPI
HF mini-LVDS TCON
What to change
HF mini-LVDS
xxLM760S-ZB
Main PCB for Broadband
WIFI
Chassis LD22E PCB P/No EAX64307905
Side
MTK5369 Block Diagram LM76
Power load
Rear
Full Scart18 Pin Gender
Jack Interface
Main SoC MTK
IC6100
R 47옴
GP4 Backend block diagram EPI & T-con
R0 옴
EPI CH4/5/6
GP4 Backend block diagram EPI & T-Con
EPI CH1/2/3
50Pin
Dual-link LVDS Output
GP4 Backend block diagram LVDS Tx & Local Dimming
LVDS Tx Block
LVDSSEL “H”=JEIDA, “L” or NC=VESA LGD
Cables
Interconnection
PCBs
xxLM760S-ZA
2012Y IR + Soft touch PCB Pinmap
Circuit Block Diagram
Ass’y Picture Pin Configuration
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
Pairing Information Transmission Sequence
1. System
Pairing Information Transmission Send to TV after Paired
Motion Data Transmission
home
power
mute
← ok →
Power Management
3. M4 Block Diagram
AA x 2 Battery
Connector
Manufacturer
4. Function list
주요 Item
Function
Method
5. RF Pairing / Un-pairing Method
Description
Introductions of 12Y WIFI built in ass’y
Pin map
WIFI Built in ass’y featureLGIT
Block 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 BOM
As-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 Manual
Error symptom
Page
Check Power Board 12v,3.5v etc
Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable
A2 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 Board
Revised date
Normal Y voltage?
Check
Check RF Signal level
S/W Version
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 error
Vertical/Horizontal bar, residual image, light spot
External Input error Component error RGB error HDMI DVI
Check Power On ‘”High”
Check Power LED
Power 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 Board
Check 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 solder
Check IR Output signal
Power B/D don’t have problem
External Input and
Recognition error
accordance
Identify nose type
Adjust VCOM
F. Exterior defect
Content
Standard Repair Process Detail Technical Manual
ALL MODELS
Edge LED
24 Pin Power Board ↔ Main Board
SMAW200-H24S YEONHO
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 section
Abnormal Display
Noise
Dim Light
Appendix Exchange PSULED driver
No 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
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
ALL MODELS
Only for training and service purposes
Standard 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