LG 42LV4400 User manual

MODEL : 42LV4400_LC420EUG-RDV2-7R1
47LV4400_LC470EUG-RDV2-KR1
P/NO：SG-0000034 (REV01) Printed in Taiwan

42LV4400，47LV440 Service Manual
Table of Contents
CONTENTS PAGE
Sections
1. Features 1-1
2. Specifications 2-1
3. On Screen Display 3-1
4. Factory Preset Timings 4-1
5. Pin Assignment 5-1
6. Main Board I/O Connections 6-1
7. Theory of Circuit Operation 7-1
8. Waveforms 8-1
9. Trouble Shooting 9-1
10. Block Diagram 10-1
11. Spare parts list 11-1
12. Complete Parts List 12-1
Appendix
1. Main Board Circuit Diagram
2. Main Board PCB Layout
3. Assembly Explosion Drawing

CONFIDENTIAL – DO NOT COPY Page 1-1
File No. SG-0000034
Chapter 1 Features
1. Built in TV channel selector for TV viewing
2. Simultaneous display of PC and TV images
3. Connectable to PC’s analog RGB port
4. Built in HDTV,composite video, HDMI ,ATV and DTV ,Audio line out, Audio
optical out
5. Built in auto adjust function for automatic adjustment of screen display
6. Smoothing function enables display of smooth texts and graphics even if
image with resolution lower than 1920x1080 is magnified
7. Power saving to reduce consumption power too less than 0.5W
8. On Screen Display: user can define display mode (i.e. color, brightness,
contrast, sharpness, backlight), sound setting, TV channel program, and
reset all setting.

CONFIDENTIAL – DO NOT COPY Page 2-1
File No. SG-0000034
Chapter 2 Specification
1. TFT LCD CHARACTERISTICS
42/47” WUXGA TFT LCD
Item Specification
Active Screen Size 42/47 inches(1067.31/1192.87mm) diagonal
Outline Dimension 968.4/1078.6(H) × 564/626(V) X 10.8(B)/18.3/22.9 mm(D)
(Typ.)
Pixel Pitch 0.4845/0.5415 mm x 0.4845/0.5415 mm
Pixel Format 1920 horiz. by 1080 vert. Pixels, RGB stripe arrangement
Color Depth 8bit, 16.7 M colors
Luminance, White 360/290 cd/m2 (Center 1point ,Typ.)
Viewing Angle (CR>10) Viewing angle free ( R/L 178 (Typ.), U/D 178 (Typ.))
Power Consumption Total 92.9/100.2W (Typ.) [(Logic=7.3/7.5W , LED
Backlight=85.6/93.1W Ext.PWM=100% )]
Weight 8.8/12.7kg (Typ.)
Display Mode Transmissive mode, Normally black
Surface Treatment Hard coating(3H), Anti-glare treatment of the front polarizer
(Haze 10%)
2.Input Connectors
USBX1(Jpag only) , HDMIX3,,D-SUB15PIN (MINI, 3rows), RCAX2
(Component/Composite and Audio IN) , Tuner
3.Output Connectors
SPDIF Out (Optical Audio) , 3.5 mini jack (Audio OUT)
4. Power Supply
a. Input voltage: 100V-240Vac, 50/60Hz
b. Input current: 1.4 /1.6A (Max)
c. Power consumption(w/set): 125W /135(Max) / 81/97W (AVG)
d. Standby/DPMS(w/set): 0.5W (Max) at 120 Vac
5.Speaker
Output 6Ω/10W (max) X2

CONFIDENTIAL – DO NOT COPY Page 2-2
File No. SG-0000034
6. ENVIRONMENT
Operating Temperature: 5c~35c (Ambient)
Operating Humidity: Ta= 35 °C, 90%RH (Non-condensing)
Operating Altitude: 0 - 14,000 feet (Non-Operating)
7. Dimensions (Physical dimension) (Unit:mm)
Display Module Display Module + Base
a. Height 631.7/693.5 687.7/751.4
b. Width 999.0/1108.1 999.0/1108.1
c. Depth 45.4 220/250
8. Weight (Physical weight)
a. Net: 10.7/16.7±1.0kg (Without Base)
b. Net: 12.2/18.6 ±1.0kg (With Base)
c. Gross: 15.8/22±1.0kg
9. Precautions
Please pay attention to the followings when you use this TFT LCD module.
9-1. Mounting Precautions
(1) You must mount a module using specified mounting holes (Details refer to the drawings).
(2) You should consider the mounting structure so that uneven force (ex. Twisted stress) is not
applied to the module. And the case on which a module is mounted should have sufficient
strength so that external force is not transmitted directly to the module.
(3) Please attach the surface transparent protective plate to the surface in order to protect the
polarizer. Transparent protective plate should have sufficient strength in order to the resist
external force.
(4) You should adopt radiation structure to satisfy the temperature specification.
(5) Acetic acid type and chlorine type materials for the cover case are not desirable because
the former generates corrosive gas of attacking the polarizer at high temperature and the latter
causes circuit break by electro-chemical reaction.
(6) Do not touch, push or rub the exposed polarizers with glass, tweezers or anything harder
than HB pencil lead. And please do not rub with dust clothes with chemical treatment.
Do not touch the surface of polarizer for bare hand or greasy cloth.(Some cosmetics are
detrimental to the polarizer.)

CONFIDENTIAL – DO NOT COPY Page 2-3
File No. SG-0000034
(7) When the surface becomes dusty, please wipe gently with absorbent cotton or other soft
materials like chamois soaks with petroleum benzine. Normal-hexane is recommended for
cleaning the adhesives used to attach front / rear polarizers. Do not use acetone, toluene and
alcohol because they cause chemical damage to the polarizer
(8) Wipe off saliva or water drops as soon as possible. Their long time contact with polarizer
causes deformations and color fading.
(9) Do not open the case because inside circuits do not have sufficient strength.
9-2. Operating Precautions
(1) The spike noise causes the mis-operation of circuits. It should be lower than following
voltage : V=±200mV(Over and under shoot voltage)
(2) Response time depends on the temperature.(In lower temperature, it becomes longer.)
(3) Brightness depends on the temperature. (In lower temperature, it becomes lower.)
And in lower temperature, response time(required time that brightness is stable after turned on)
becomes longer
(4) Be careful for condensation at sudden temperature change.Condensation makes damage
to polarizer or electrical contacted parts. And after fading condensation, smear or spot will
occur.
(5) When fixed patterns are displayed for a long time, remnant image is likely to occur.
(6) Module has high frequency circuits. Sufficient suppression to the electromagnetic
interference shall be done by system manufacturers. Grounding and shielding methods may
be important to minimized the interference.
(7) Please do not give any mechanical and/or acoustical impact to LCM. Otherwise, LCM can’t
be operated its full characteristics perfectly.
(8) A screw which is fastened up the steels should be a machine screw. ( if not, it can causes
conductive particles and deal LCM a fatal blow)
(9) Please do not set LCD on its edge.
(10) The conductive material and signal cables are kept away from LED driver inductor to
prevent abnormal display, sound noise and temperature rising.
9-3. Electrostatic Discharge Control
Since a module is composed of electronic circuits, it is not strong to electrostatic discharge.
Make certain that treatment persons are connected to ground through wrist band etc. And
don’t touch interface pin directly.

CONFIDENTIAL – DO NOT COPY Page 2-4
File No. SG-0000034
9-4. Precautions for Strong Light Exposure
Strong light exposure causes degradation of polarizer and color filter.
9-5. Storage
When storing modules as spares for a long time, the following precautions are necessary.
(1) Store them in a dark place. Do not expose the module to sunlight or fluorescent light. Keep
the temperature between 5°C and 35°C at normal humidity.
(2) The polarizer surface should not come in contact with any other object. It is recommended
that they be stored in the container in which they were shipped.
(3) Storage condition is guaranteed under packing conditions.
(4) The phase transition of Liquid Crystal could be recovered if the LCM is released at the
normal condition after the low or over the storage temperature.
9-6. Handling Precautions for Protection Film
(1) The protection film is attached to the bezel with a small masking tape.
When the protection film is peeled off, static electricity is generated between the film and
polarizer. This should be peeled off slowly and carefully by people who are electrically
grounded and with well ionblown equipment or in such a condition, etc.
(2) When the module with protection film attached is stored for a long time, sometimes there
remains a very small amount of glue still on the bezel after the protection film is peeled off.
(3) You can remove the glue easily. When the glue remains on the bezel surface or its vestige
is recognized, please wipe them off with absorbent cotton waste or other soft material like
chamois soaked with normalhexane.

CONFIDENTIAL – DO NOT COPY Page 3-1
File No. SG-0000034
Chapter 3 On Screen Display
Operation:
Main unit button (1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
LGE 2011 UI Adjustment
Main Menu
Channel
Picture
Audio
Time
Option
Lock
Input
My Media

CONFIDENTIAL – DO NOT COPY Page 3-2
File No. SG-0000034
Channel
a. Auto Tuning
b. Manual Tuning
a. Type: TV, CATV, DTV, CADTV
b. Channel
c. Add / Delete
d. Close
c. Channel Edit
a. Type: TV, CATV, DTV, CADTV
b. Channel Change
c. Add / Delete / Remove Favorite
Picture
A. Aspect Ratio (Set by Program, 4:3, 16:9, Zoom,
Cinema Zoom, Just Scan)
Source TV/Comp/HDMI AV
Resolution 480i/p 720p,
1080i/p 480i only
Set b
y
Program Yes Yes Yes
4:3 Yes Yes Yes
16:9 Yes Yes Yes
Zoom Yes Yes Yes
Cinema Zoom Yes Yes Yes
Just Scan N/A Yes N/A
B. Energy Saving (Auto, Off, Minimum, Medium,
Maximum, Screen Off)
C. Picture Mode (Vivid, Standard, Cinema, Sport,
Game)
a. Backlight (0 ~ 100)

CONFIDENTIAL – DO NOT COPY Page 3-3
File No. SG-0000034
b. Contrast (0 ~ 100)
c. Brightness (0 ~ 100)
d. Sharpness (0 ~ 100)
e. Color (0 ~ 100)
f. Tint (R50 ~ G50)
g. Advanced Control
g-1. Color Temperature (Cool, Medium,
Warm)
g-2. Fresh Contrast (Off, Low, Medium, High)
g-3. Fresh Color (Off, Low, High)
g-4. Noise Reduction (Off, Low, Medium,
High)
g-5. Gamma (Low, Medium, High)
g-6. Black Level (Low, High)
g-7. Eye Care (Off, On)
g-8. Real Cinema (Off, On)
h. Reset
D. Screen (RGB-PC)
a. Resolution (1024X768, 1280X768, 1360X768)
b. Auto Config.
c. Position (H Position, V Position)
d. Size (-30 ~ 30)
e. Phase (-32 ~ 31)
f. Reset
Audio
A. Balance (L50 ~ R50)
B. Sound Mode (Standard, Music, Cinema, Sport,
Game)
a. Treble (0 ~ 100)
b. Bass (0 ~ 100)
c. Reset
C. TV Speaker (On, Off)

CONFIDENTIAL – DO NOT COPY Page 3-4
File No. SG-0000034
D. Digital Audio Out (Dolby Digital, PCM)
E. Analog Audio Out (Fixed, Variable)
Time
A. Clock (Auto, Manual)
a. Year (2011 ~ 2035)
b. Month (1 ~ 12)
c. Date (1 ~ 31)
d. Hour (12AM ~ 11PM)
e. Minute (0 ~ 59)
f. Time Zone(
US: Eastern, Central, Mountain, Pacific, Alaska,
Hawaii
Canada: Eastern, Central, Mountain, Pacific,
New Foundland, Atlantic
Mexico: Eastern, Central, Mountain, Pacific,
Alaska, Hawaii)
g. Daylight Saving (Auto, On, Off)
B. Off Time
a. Repeat (Off, Once, Everyday, Mon~Fri,
Mon~Sat, Weekend, Sunday, )
b. Hour (12AM ~ 11PM)
c. Minute (0 ~ 59)
C. On Time
a. Repeat (Off, Once, Everyday, Mon~Fri,
Mon~Sat, Weekend, Sunday)
b. Hour (12AM ~ 11PM)
c. Minute (0 ~ 59)
d. Input (TV, AV, Component, RGB-PC, HDMI1,
HDMI2)
e. Channel

CONFIDENTIAL – DO NOT COPY Page 3-5
File No. SG-0000034
f. Volume (0 ~ 100)
D. Sleep Timer (Off, 10 min, 20 min, 30 min, 60 min, 90
min, 120 min, 180 min, 240 min)
E. Auto Sleep (Off, On)
Option
A. Language
a. Menu (English, Spanish, French)
b. Audio (English, Spanish, French)
B. Input Label
a. AV (VCR, DVD, Set Top Box, Satellite, Cable
Box, Game, PC, HD-DVD, Blu-Ray)
b. Component (VCR, DVD, Set Top Box, Satellite,
Cable Box, Game, PC, HD-DVD, Blu-Ray)
c. RGB-PC (VCR, DVD, Set Top Box, Satellite,
Cable Box, Game, PC, HD-DVD, Blu-Ray)
d. HDMI1 (VCR, DVD, Set Top Box, Satellite, Cable
Box, Game, PC, HD-DVD, Blu-Ray)
e. HDMI2 (VCR, DVD, Set Top Box, Satellite, Cable
Box, Game, PC, HD-DVD, Blu-Ray)
C. Key Lock (Off, On)
D. Caption (Off, On)
a. Mode (CC1 ~ Text4, Service1 ~ Service6)
b. Digital Option (Set by Program, Custom)
b-1. Size (Small, Standard, Large)
b-2. Font (Font1 ~ Font8)
b-3. Text Color (White, Black, Red, Green, Blue,
Yellow, Magenta, Cyan)
b-4. Text Opacity (Solid, Flash, Translucent,
Transparent)
b-5. Bg Color (White, Black, Red, Green, Blue,
Yellow, Magenta, Cyan)

CONFIDENTIAL – DO NOT COPY Page 3-6
File No. SG-0000034
b-6. Bg Opacity (Solid, Flash, Translucent,
Transparent)
b-7. Edge Type (None, Uniform, Raised,
Depressed, Left Shadow, Right Shadow)
b-8. Edge Color (White, Black, Red, Green,
Blue, Yellow, Magenta, Cyan)
E. Initial Setting (In Store, Home)
Lock
A. Lock System (Off, On) (default password: 0000)
B. Set Password
a. New
b. Confirm
C. Block Channel
a. Type: TV, CATV, DTV, CADTV
b. Channel Change
c. Block, Un-block
D. Movie Rating (Off, X, NC-17, R, PG-13, PG, G) (US
model only)
E. TV Rating-Children (US model only)
a. Age (Off, TV-Y7, TV-Y)
b. Fantasy Violence (Off, TV-Y7)
F. TV Rating-General (US model only)
a. Age (Off, TV-MA, TV-14, TV-PG, TV-G)
b. Dialogue (Off, TV-14, TV-PG)
c. Language (Off, TV-MA, TV-14, TV-PG)
d. Sex (Off, TV-MA, TV-14, TV-PG)
e. Violence (Off, TV-MA, TV-14, TV-PG)
G. TV Rating-English (Off, E, C, C8+, G, PG, 14+, 18+)
(Canada model only)
H. TV Rating-French (Off, E, G, 8ans+, 13ans+,
16ans+, 18ans+) (Canada model only)

CONFIDENTIAL – DO NOT COPY Page 3-7
File No. SG-0000034
I. Downloadable Rating
J. Input Block
a. AV (Off, On)
b. Component (Off, On)
c. RGB-PC (Off, On)
d. HDMI1 (Off, On)
e. HDMI2 (Off, On)
Input
TV
AV
Component
RGB-PC
HDMI-1
HDMI-2
My Media
A. Photo List
a. Slideshow Mode (Single, Sequence, Shuffle)
b. Repeat (Off, On)
c. Sort By (Photo Date, File Date, FileA-Z)
d. Duration (5 ~ 32)
e. Slideshow Effect (Random, Dissolve, Wipe
Right, Wipe Left, Wipe Up, Wipe Down, Box In,
Box Out)
f. Thumbnail Size (Small, Medium, Large)
g. Information (Off, On)

CONFIDENTIAL – DO NOT COPY Page 3-8
File No. SG-0000034
Q.Menu
A. Aspect Ratio (Set By Program, 4:3, 16:9, Zoom,
Cinema Zoom, Just Scan)
B. Backlight (0 ~ 6)
C. Picture Mode (Vivid, Standard, Cinema, Sport,
Game)
D. Sound Mode (Standard, Music, Cinema, Sport,
Game)
E. Caption (Off, On)
F. Multi Audio (Mono, Stereo, SAP)
G. Sleep Timer (Off, 10 min, 20 min, 30 min, 60 min, 90
min, 120 min, 180 min, 240 min)
H. Del/Add/Fav (Add, Favorite, Delete)

CONFIDENTIAL – DO NOT COPY Page 4-1
File No. SG-0000034
Chapter 4 Factory preset timings
This timing chart is already preset for the TFT LCD analog & digital display
monitors.
RGB For VESA Standard:
Mode
No. Resolution
Refresh
Rate
(Hz)
Horizontal
Frequency
(KHz)
Vertical
Frequency
(Hz)
Horizontal
Sync
Polarity
(TTL)
Vertical
Sync
Polarity
(TTL)
Pixel
Rate
(MHz)
Remark
1 640 x 480 60 31.469 59.941 N N 25.175 Windows
2 640 x 480 75 37.500 75.000 N N 31.500 Windows
3 800 x 600 60 37.879 60.317 P P 40.000 Windows
4 800 x 600 72 48.077 72.188 P P 50.000 Windows
5 800 x 600 75 46.875 75.000 P P 49.500 Windows
6 1024 x 768 60 48.363 60.004 N N 65.000 Windows
7 1024 x 768 70 56.476 70.069 N N 75.000 Windows
8 1024 x 768 75 60.023 75.029 P P 78.750 Windows
9 720 x 400 70 31.469 70.087 N P 28.322 DOS
10 ◎1920 x 1080 60 66.587 59.934 P N 138.500 Windows
Remark: P: positive, N: negative 1920x1080 @60 Hz: Primary
*Note: VESA Reduced Blanking Timing mode, see Table below.

CONFIDENTIAL – DO NOT COPY Page 4-2
File No. SG-0000034
Resolution (1920x1080) through RGB (15-Pin D connector)
FHD video digital preset modes at HDMI
Mode No. Resolution
1 480i
2 480p
3 720p
4 1080i
5 1080p
Video input
Mode No. Resolution
1 480i
2 480p
3 720p
4 1080i
5 1080p
Parameters Horizontal Values
(Pixels) Vertical Values (Lines)
Address 1920 1080
Front Porch 48 3
Sync Width 32 5
Back Porch 80 24
Total 2080 1111
Frequency 66.587 KHz 59.934 Hz
Sync Polarity P N
Pixel Rate (MHz) 138.5
Refresh Rate
(Hz) 60

CONFIDENTIAL – DO NOT COPY Page 5-1
File No. SG-0000034
Chapter 5 Pin Assignment
The TFT LCD monitors use a 15 Pin Mini D-Sub connector as video input source.
Pin Description
1 Red
2 Green
3 Blue
4 Ground
5 Ground
6 R-Ground
7 G-Ground
8 B-Ground
9 +5V for DDC
10 Ground
11 No Connection
12 (SDA)
13 H-Sync (Composite Sync)
14 V-Sync
15 (SCL)

CONFIDENTIAL – DO NOT COPY Page 5-2
File No. SG-0000034
RGB Signal:
a. Sync Type TTL (Separate / Composite) or Sync. On Green
b. Sync polarity Positive or Negative
c. Video Amplitude RGB: 0.7Vp-p
d. Frequency H: support to 30K~70KHz
V: support to 60~85Hz
e. Pixel Clock: support to 138.5 MHz
f. Connector type: 15-pin D-Sub, female
g. Impedance: 75
HDMI CONNECT PIN ASSIGNMENT:
PIN SIGNAL ASSIGNMENT
1 TMDS Data2+
2 TMDS Data2 Shield
3 TMDS Data2-
4 TMDS Data1+
5 TMDS Data1 Shield
6 TMDS Data1-
7 TMDS Data0+
8 TMDS Data0 Shield
9 TMDS Data0-
10 TMDS Clock+
11 TMDS Clock Shield
12 TMDS Clock-
13 CEC
14 Reserved (N.C on device)
15 SCL
16 SDA
17 DDC/CEC Ground
18 +5V Power
19 Hot Plug Detect

CONFIDENTIAL – DO NOT COPY Page 5-3
File No. SG-0000034
HDMI Signal (HDMI):
a. Pin Assignment Refer to HDMI Pin Assignment
b. Type A
c. Polarity Positive or Negative
d. Frequency
H: 15.734KHz V: 60Hz (NTSC-480i)
H: 31KHz V: 60Hz (NTSC-480p)
H: 45KHz V: 60Hz (NTSC-720p)
H: 33KHz V: 60Hz (NTSC-1080i)
H: 67.5KHz V: 60Hz (NTSC-1080P)
F-Type TV RF connector
NTSC system
Signal level: Analog 1Vp-p Typical
Frequency: 55.00 ~ 801.00 MHz
ATSC system
IF-output level: 1Vp-p minimum
Frequency: 57.00~803.00 MHz
QAM system (supporting clear QAM)
IF-output level: 1Vp-p minimum
Frequency: 57.00~849.00 MHz