LG FLATRON 27UD68WG User manual

P/NO : MFL68962209(1511-REV00) Printed in China
COLOR MONITOR
SERVICE MANUAL
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : LM55H
MODEL: 27UD68
Internal Use Only

- 2 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
CONTENTS
CONTENTS .............................................................................................. 2
PRECAUTION............................................................................................3
SERVICING PRECAUTIONS.....................................................................4
SPECIFICATIONS......................................................................................6
TIMING CHART .......................................................................................11
ADJUSTMENT .........................................................................................14
BLOCK DIAGRAM...................................................................................18
TROUBLE SHOOTING ............................................................................19
EXPLODED VIEW .................................................................................. 22
SVC. SHEET ...............................................................................................

- 3 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
PRECAUTION
WARNING FOR THE SAFETY-RELATED COMPONENT.
• There are some special components used in LCD monitor that
are important for safety. These parts are marked on the
schematic diagram and the Exploded View. It is essential
that these critical parts should be replaced with the
manufacturer’s specified parts to prevent electric shock, fire or
other hazard.
• Do not modify original design without obtaining written
permission from manufacturer or you will void the original parts
and labor guarantee.
TAKE CARE DURING HANDLING THE LCD MODULE WITH
BACKLIGHT UNIT.
• Must mount the module using mounting holes arranged in four
corners.
• Do not press on the panel, edge of the frame strongly or electric
shock as this will result in damage to the screen.
• Do not scratch or press on the panel with any sharp objects,
such as pencil or pen as this may result in damage to the panel.
• Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).
• Make certain that treatment person’s body are grounded
through wrist band.
• Do not leave the module in high temperature and in areas of
high humidity for a long time.
• The module not be exposed to the direct sunlight.
• Avoid contact with water as it may a short circuit within the
module.
• If the surface of panel become dirty, please wipe it off with a
softmaterial. (Cleaning with a dirty or rough cloth may damage
the panel.)
WARNING
BE CAREFUL ELECTRIC SHOCK !
• If you want to replace with the new backlight (CCFL) or LIPS
part, must disconnect the AC power because high voltage
appears at inverter circuit about 650Vrms.
• Handle with care wires or connectors of the inverter circuit. If
the wires are pressed cause short and may burn or take fire.
Leakage Current Hot Check Circuit
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
When 25A is impressed between Earth and 2nd Ground
for 1 second, Resistance must be less than 0.1
*Base on Adjustment standard
Ω
0.15uF

- 4 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conflict between the
following servicing precautions and any of the safety precautions on
page 3 of this publication, always follow the safety precautions.
Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or re-connecting any receiver electrical plug or
other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Test high voltage only by measuring it with an appropriate high
voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specified otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10% (by volume) Acetone and 90% (by
volume) is opropyl alcohol (90%-99% strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual, lubrication of
contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks are
correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test fixtures specified in this
service manual.
CAUTION: Do not connect the test fixture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily
by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques
should be used to help reduce the incidence of component
damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist strap device, which should be removed to
prevent potential shock reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES
devices.
4. Use only an anti-static type solder removal device. Some solder
removal devices not classified as "anti-static" can generate
electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum foil
or comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be
installed.
CAUTION: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Otherwise harmless motion such as
the brushing together of your clothes fabric or the lifting of your
foot from a carpeted floor can generate static electricity
sufficient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropriate
tip size and shape that will maintain tip temperature within the
range or 500ºF to 600ºF.
2. Use an appropriate gauge of RMA resin-core solder composed
of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall wire-
bristle (0.5 inch, or 1.25cm) brush with a metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature.
(500ºF to 600ºF)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suction-
type solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
(500ºF to 600ºF)
b. First, hold the soldering iron tip and solder the strand against
the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder flows onto and around both the
component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently
prying up on the lead with the soldering iron tip as the solder
melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing the
IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete TransistorRemoval/Replacement
1. Remove the defective transistor by clipping its leads as close as
possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining
on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as
possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and if
necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever
this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC
connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the good
copper pattern. Solder the overlapped area and clip off any
excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly
connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.

Copyright © 2010 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only
Only for training and service purposes
SPECIFICATIONS
1. General Specification
No Item Content Remark
1 Customer BRAND
2 User Model Name 27UD68
3 Sale region Worldwide
4 Feature 27” LCD MONITOR(UHD)
5 Chassis Name LM55H
6 General
Scope
External SW
& Adj.
5-way joystick switch
Function
PBP, Picture Mode, Ratio, S.E.S, Six Color, On Screen
Control, Dual Controller
Gamma calibration
7 Power Cord Length : 1.55±0.05 M / Shape : Wall-out / Color : Black
Weight : 0.16kg
Power cord can be changed
according to region.
If wall-mount adapter is
applied, Power cord doesn’t
apply to the BOM
8 Cable
Thunderbolt Length : ,Shape : ,Color: ,Pin Do not provide
USB 3.0
Length :1.5m ,Shape :A-B ,Color : Black ,Pin
Weight : 0.1kg
Do not provide
2 Pair
(4C)
Pin N/o: (5,6)(8,9)
Impedance: [90Ω±7Ω]
1 Pair
(2C)
Pin N/o: (2,3)
Impedance: [90Ω±13.5Ω]
Audio Length : ,Shape : ,Color: ,Pin Do not provide
HDMI
Length : 1.5m / Shape : Detachable Type / Color : White
Weight : 0.091kg SET accessory /
P/N : EAD00926140
CABLE : 100Ω±10Ω
CONNECTOR : 100Ω±15Ω
DisplayPort
Length : 1.5m / Shape : Detachable Type / Color : White
Weight : 0.095kg SET accessory /
P/N : EAD63127604(Ver1.2)
CABLE : 100Ω±5Ω
CONNECTOR : 100Ω±10Ω
DP to Mini DP Length : 1.8m / Shape : Detachable Type / Color : black
Weight : 0.105kg
SET accessory /
P/N : EAD63127601(Ver1.2)

Copyright © 2010 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only
Only for training and service purposes
CABLE : 100Ω±5Ω
CONNECTOR : 100Ω±10Ω
9 Power
Input: AC100~240V 50~60Hz,1.1A Max
Output: DC 19V 2.1A
40W Adapter
Weight : 203g (EAY62850011)
[Applied Adapter type]
- KR / EU : Wall-mount 3Pin.
- Another site including EK :
Desk-top 3Pin
1) Wall-mount
- P/N : EAY62850011
Input: AC100~240V
50~60Hz,1.1A Max
Output: DC 19V 2.1A
40W Adapter
2) Desk-top
- P/N : EAY62850503
Input: AC100~240V
50~60Hz,1.1A Max
Output: DC 19V 2.1A
40W Adapter
- P/N : EAY63190001
Input: AC100~240V
50~60Hz,1.2A Max
Output: DC 19V 2.1A
40W Adapter
10 Mechanical
(ass’y)
Cable holder 5g SET accessory / PNo. :
MEG64718801
Screw 5g(2ea) SET accessory / PNo. :
FAB30006505
Stand Body
Cover 10g SET accessory / PNo. :
MCK69106401
Stand Body 100g SET accessory / PNo. :
AAN75689001

Copyright © 2010 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only
Only for training and service purposes
Stand Base 250g SET accessory / PNo. :
AAN75648902
11 Manual ass’y 0.086kg SET accessory / Refer to BOM
12 Handling guide 0.006kg SET accessory / Refer to BOM
13 Factory calibration report 0.006kg SET accessory / Refer to BOM
14 Applying module list
P/No Specification Support FreeSync function
New Blade 27” Module
EAJ63750201 LM270WR3-SSA1

- 9 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2. Mechanical specification
No Item Content Remark
1
Product
Dimension
Width (W) Length (D) Height (H)
Before Packing 829.9 252.4 428.9 mm, With Stand
829.9 49.2 379.8 mm, Without Stand
After Packing 98.3 21.2 52.9 mm
2
Product
Weight
Only SET 8.0kg/5.9kg With Stand / Without Stand
With BOX 10.8kg
Only Stand / Accessory 0.5±5%/0.4±5%
3 Container
Loading
Quantity
Individual or
Palletizing
20ft 40ft
EA
Indi. Pallet Indi. Pallet
200 200 600 440
4
Stand
Assy
Type Base detachable
Size (W x D x H) 504.3*252.4*418.8 mm
Tilt Degree -5(+1/-5) ~ 20(+1/-5) degree
Tilt force 1.0~3.0 kgf
Folding Degree N/A
Height length 120±2 mm
5 Appearance General
Middle Cabinet : Black Glossy
Back cover : Black Glossy
Stand Body : Black hairline and Glossy Stand
Base : Black hairline and Glossy

- 10 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
3. Optical Character
1 Viewing Angle
<CR≥10> Horizontal(R/L) : +89º/-89º ( (Typ.)
Vertical(Top/Bottom) : +89º/-89º (Typ.)
2 Luminance(휘도) Average
Luminance
(cd/m2)
250(min), 300 (Typ.)
(Full white pattern, 0.7V) Warm (6500K)
Average
Luminance
(cd/m2)
220 (min)
(Full white pattern, 0.7V) Medium (8000K)
Average
Luminance
(cd/m2)
190 (min)
(Full white pattern, 0.7V) Cool (9300K)
Luminance
Uniformity 75%(min),
3 Contrast Ratio(명암
비) 700(MIN), 1000(TYP),
DFC Æ1,000,000:1(min), 5,000,000:1(Typ.)
DFC test condition : Full black pattern
(MSPG 126 timing)
DFC : ON (Picture>Picture Adjust)
4 Response Time TGTG(Gray to Gray): 14ms(Typ.), 25ms(Max)
5 CIE Color
Coordinates
(색좌표)
Minimum Normal Maximum
White WXTyp-0.03 0.313 Typ+0.03 Warm
(6500K)
WY0.329
White WXTyp-0.03 0.295 Typ+0.03 Medium
(8000K)
WY0.305
White WXTyp-0.03 0.283 Typ+0.03 Cool
(9300K)
WY0.298
6 Color Coordinate
White signal
reader mode
WXTyp-0.02 0.365 Typ+0.02 Full white
pattern -
Warm(6500K)
WY0.360
7 Color weakness Red signal
WXTyp-0.03 0.490 Typ+0.03 Full red pattern
WY0.250
8 RGB COLOR coordi
nates
RED Rx
Typ-0.03
0.652
Typ+0.03
Ry 0.334
GREEN Gx 0.307
Gy 0.637
BLUE
Bx 0.150
By 0.060

- 11 -
Copyright©2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
4. Engineering Specification
2 Operating Frequency
Single
HDMI
Horizontal 30 ∼ 135kHz
Vertical 56 ∼ 61 Hz HDMI2.0 Native : 60Hz
DP
Horizontal 30 ∼ 135kHz
Vertical 56 ∼ 61 Hz
Native : 60Hz, FreeSync Range :
40-60Hz
USB -C
Horizontal 30 ∼ 135kHz
Vertical 56 ∼ 61 Hz Native : 60Hz
PBP
HDMI
Horizontal 30 ∼ 135kHz
Vertical 56 ∼ 61 Hz Native : 60Hz
DP
Horizontal 30 ∼ 135kHz
Vertical 56 ∼ 61 Hz Native : 60Hz, PBP mode can’t
support FreeSync
USB -C
Horizontal 30 ∼ 135kHz
Vertical 56 ∼ 61 Hz Native : 60Hz
3 Resolution Single
HDMI
Max. 3840×2160 @ 60Hz
Recommend 3840×2160 @ 60Hz
DP
Max. 3840×2160 @ 60Hz
Recommend 3840×2160 @ 60Hz
USB -C
Max. 3840×2160 @ 60Hz
Recommend 3840×2160 @ 60Hz

- 12 -
Copyright©2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
PBP
HDMI Max. 1920×2160 @ 60Hz
Recommend 1920×2160 @ 60Hz
DP
Max. 1920×2160 @ 60Hz
Recommend 1920×2160 @ 60Hz
USB -C
Max. 1920×2160 @ 60Hz
Recommend 1920×2160 @ 60Hz
4 Input Voltage Voltage :100 – 240 Vac, 50 or 60Hz
5 Color depth
DisplayPort 10-bit color
HDMI1 / HDMI2 Deep Color(10bit, 12bit)
6 Impedance Pattern HDMI 100 ohm(-+10%)
DP 100 ohm(-+10%)
7 Inrush Current Cold Start : 50 A Hot : 120 A
8
Operating Condition Sync
(H/V) Video LED Wattage
On Mode On/On Active
White
41W
- Adapter input /
UHD@60Hz, Full white,
Outgoing Condition
29W
- Manual/spec-sheet spec :
EPA6.0
condition+250nit+110%(mar
gin)
White
Max 19V,
1.9A
- Refer to measurement
condition(1) – page 21 /
Adapter output
48W - Adapter input
Sleep Mode
Off/On
On/Off
Off/Off
Off White
Blinking 0.5W
PC : Stand-by Mode.
Off Mode Off 0.3W DC Switch Off
EPA On/On Test video White 66.31W EPA6.0 test standard
ERP On/On Test video White 30.2W ERP A class / Condition :
Outgoing condition
Power rating - - - 19V 2.0A

-13 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
SMART ENERGY
SAVING On/Off - -
Efficiency
low : 15
+/- 5%
high : 25
+/- 5%
Test with outgoing
condition(출하조건)
-. Backlight 100 / Test
video
-. Refer to measurement
condition(2) – page 17
9 MTBF 30,000 HRS with 90% confidence level Lamp Life : 30,000
Hours(Min)
10 Using Altitude 5,000 m (for Reliability) 3,000m(for FOS)
11
Environ
ment
Conditi
on
operating Temperature 0°C ~ 40°C
Humidity Less than 80%
Storage Temperature -20 C ~ 60 C
Humidity Less than 85%
OSD
Menu
Quick
Settings
Brightness 1 – 100
Contrast 1 – 100
Volume 1 – 100, Mute
Input HDMI1 / HDMI2 / DP
Ratio Wide / Original / 1:1
PBP
SUB Off / HDMI1 / HDMI2 / DP
Sound out Main Audio / Sub Audio
Swap
Sub Full
Ratio
Main Wide / Original
Sub Wide / Original
Picture
Picture Mode
Custom / Reader / Photo / Cinema
/ sRGB /
Color weakness / FPS Game1/FPS
Game 2 / RTS Game/Custom(Game)
Picture
Adjust
Super
Resolution
+
High/ Middle/ Low / Off /
Sharpness 0 – 100

Copyright © 2010 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only
Only for training and service purposes
Black Level High / Low
HDMI HD
UHD Deep
Color
On / Off
When UHD Deep
Color on,
screen noise/flicker
could be occurred
with some HDMI
device.
DFC On / Off
Game
Adjust
FreeSync On / Off
Black
Stabilizer
0-100
Response
Time
High / Middle / Low / Off
Color
Adjust
Gamma Gamma 0 / Gamma 1 / Gamma 2
Color Temp
Manual 5000 - 10000
Custom -
Red 0 -100
Green 0 - 100
Blue 0 -100
Six Color
Red Hue / Saturation : 0 – 100
Green Hue / Saturation : 0 – 100
Blue Hue / Saturation : 0 – 100
Cyan Hue / Saturation : 0 – 100
Magenta Hue / Saturation : 0 – 100
Yellow Hue / Saturation : 0 – 100
Reset Reset / Cancel

Copyright © 2010 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only
Only for training and service purposes
English, Germanic, French, Spanish,
Italian, Swedish, Finnish, Portuguese,
Language Portuguese(brazil), Polish, Russian,
Greek, Ukrainian, Chinese,
Japanese, Korean
General Smart Energy Saving Off / Low /High
FreeSync On / Off
Power LED On / Off
Automatic Standby Off / 4H / 6H / 8H
DP 1.2 Enable / Disable
OSD Lock On / Off
Reset Reset / Cancel
5.2 Open Source License
If Need
Open Source Use Manual License (in Web) Source (in Web)
27UD68 O O O

- 16 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
(1) Standard Measurement Condition
• Ambient Luminance Level : dark ( < 10 lux)
• Ambient Temperature : Normal Temperature(10ºC ~ 25ºC)
• warm-up Time : More than 30 min (at Full White Pattern)
• Input Signal : VESA 1920 X 1080 @ 60 Hz
• Contrast : 70 (But, the contrast is 100 when we check response time)
• Brightness : Max. 100
• Color Temp : CUSTOM
• Clock/Clock Phase : The Best Setting
(2) Another Spec.: Product Specification Standard( LG(55)G1-1034 ) C
(3) Cosmetic Spec. : LCD Module IIS Spec.
Activearea
5.1 Display Area
A
1) Active Display Area of the LCD Monitor Should be within Cabinet’s Bezel.
2) Distance Difference between Active Area and Bezel A A B
| A-B|<1.0 mm , | C-D|<1.0 mm
A: The Distance from The Left of Active Area to the Bezel
Bezel
B: The Distance from The Right of Active Area to the Bezel
C: The Distance from The Top of Active Area to the Bezel
D: The Distance from The Bottom of Active Area to the Bezel D
5. Applying module Character
1
LCD
Module
Feature
Maker LGD
T
yp
e IPS
Active Dis
p
la
y
Area 27.0 inches
(
68.47cm
)
(
As
p
ect ratio 16:9
)
Pixel Pitch
[
mm
]
0.1554
[
mm
]
X 0.1554
[
mm
]
Electrical Interface eDP
Color De
p
th 1.07 Billion colors, 10 Bit
(
8bit+A-FRC
)
Size (Outline) [mm] 608.8(H)x355.3(V)x12.8(D)mm (Typ.)
Surface Treatment Advanced Anti-glare treatment of the front
polarizer(3H)
Operating Mode Transmissive mode, normally Black
Back light Unit White LED
Color Gamut sRGB 99%
No Item Content Remark

- 17-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
6. EDID
6.1 Single EDID Information
No Item Content 16진 Data
HDMI1/2 : 23304 085B
2 Product ID DP : 23305 095B
3 Year 2015 19
4 Version 1
HDMI : 3 HDMI : 3
5 Revision DP : 4 DP : 4
6 Serial Number Refer to variable data file Refer to variable data file
7 Week Refer to variable data file Refer to variable data file
8 Model Name LG Ultra HD -
9 Check Sum Refer to variable data file Refer to variable data file
10 Special Item
6.1.1.1 HDMI1 EDID (HDMI1.4)
1) Physical Address : HDMI1=10

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2.1.1.2 HDMI2 EDID (HDMI1.4)
1) Physical Address : HDMI2=20
2.1.1.3 HDMI1 EDID (HDMI2.0)

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2.1.1.4 HDMI2 EDID (HDMI2.0)
2.1.2 DP EDID (DP1.2)

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2.1.3 DP EDID Of FREE-SYNC ON