DOWNLOAD LG 42LM640S / 42LM640T / 42LM649S / 42LM649T (CHASSIS:LD22E) Service Manual ↓ Size: 10.29 MB | Pages: 118 in PDF or view online for FREE

Model
42LM640S 42LM640T 42LM649S 42LM649T (CHASSIS:LD22E)
Pages
118
Size
10.29 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lm640s-42lm640t-42lm649s-42lm649t-chassis-ld22e.pdf
Date
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LG 42LM640S / 42LM640T / 42LM649S / 42LM649T (CHASSIS:LD22E) Service Manual ▷ View online

EPI Interface (mini-LVDS vs. EPI)
Comparison
HF mini-LVDS
What to change
EPI (Embedded clock P-to-P Interface)
-
Difficult to upgrade bandwidth limit
-
Multiple number of wires needed for higher bandwidth
HF mini- 
LVDS
FHD (10bit)
60Hz
120Hz
240Hz
No. of Signal
36
36
72
Connector
60pin
(2ea)
60pin
(2ea)
80pin
(2ea)
-
Better reliability on common noise
-
No data skew. Better EMI margin
-
Lower cost ( Cable, Connector )
-
Slim S-PCB design (14mm 
Æ 10mm) helps slimmer TV
EPI
FHD (10bit)
60Hz
120Hz
240Hz
960ch
960ch
720ch
No. of Signal
12
12
32
Connector
-
50 pin 
(2ea)
70pin 
(2ea)
LCM (T-con to S-Driver IC)
TCON
2
LOCK
VCC
1
TCON
18
VCC
1
18
HF mini-LVDS
EPI
* Bandwidth Capability 
- FHD 120Hz 10Bit : 594Mbps@36Lines → 1.65Gbps@12Lines
- FHD 240Hz 10Bit : 594Mbps@72Lines → 1.25Gbps@32Lines
(FHD 120Hz)
(FHD 120Hz)
HF mini-LVDS
EPI
Topology
Protocol
Features
@10bit, FHD120
•
Multi Drop
•
Data rate: 660Mbps
•
External clock
•
Point to Point
•
Data rate : 1.8Gbps
•
Embedded clock, Control
Merit
•
Simple structure
•
Standardization
•
Fewer Lines : 12
•
Embedded clock 
: low EMI, Clock skew free
•
Easy to PCB design
Demerit
•
Too many lines : 36
•
Clock skew
•
EMI due to clock lines
•
Bandwidth limit
•
Transmission Overhead
: 4bit delimiter
TCON
Lock
2
1
TCON
EPI Interface (mini-LVDS vs. EPI)
Main PCB for Broadband
Main + TCON all in one
To PSU
1
2
6
4
1
Main processor, DDR Memory
eMMC Memory
2
3
4
Micom for Key/IR sensing 
PMIC
Audio AMP (10W+10W)
xxLM760S-ZB
Soft touch +IR
Front Spk
To module
5
5
EPI Wafer 
G/S 
model
2
1
LNB IC 
Only G/S model
1
2
Chassis : LD22E
PCB P/No : EAX64307905
3
6
Level shifter
WIFI
RF Assy
MTK5369 Block Diagram( LM76 )
L/R In
SPDIF OUT
USB
Audio
AMP
(NTP7500 
or STA)
I2S Out
MTK
CI slot
CI slot
P_TS
CVBS
P_TS
T/C  Demod
IF(+/-)
USB1
RS-232C
PC-RGB
PC-AUDIO
OPTIC
LAN
SYSTEM
DDR3 
X 
1600 X 16 
(2Gb)
HDMI1
HDMI2
HDMI3
Side
Rear
RGB,H/V
Ethernet
CVBS
UART
SYSTEM EEPROM X 1
(256Kb)
HDMI
MUX
(HDCP
EEPROM)
M-Remote 
Module
Air/
Cable
TUNER
(T/C)
TUNER
(S2)
DIGITAL
DEMOD
(T/C)
DVB-S
ANALOG
DEMOD
DIGITAL
DEMOD
(S2)
TS_S/P
LNB
USB2
USB3
HDMI4
LVDS
41P
51P
eMMC X 1
(4GB)
USB_WIFI
SYSTEM
DDR3 
X 
1600 X 16
(2Gb) 
DDR 
CONTROLER A/B
SPI
LOCAL  DIMMING
I2C
Sub Micom 
(RENESASA)
IR
Remote Control
SYSTEM
DDR3 
X 
1600 X 16 
(2Gb)
SYSTEM
DDR3 
X 
1600 X 16
(2Gb) 
UART
P_TS
Power load
EPI
50P
50P
X_TAL
27MHz
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