LG 27MP58VQ User manual

P/NO : MFL67715296(1510-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. : LM68A
MODEL: 27MP58VQ
Internal Use Only

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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 ...............................................................................................

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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

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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.

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
SPECIFICATIONS
1. General Specification
No Item Content Remark
1 Customer BRAND
2 User Model Name xxMP58VQ, xxMP58D, xxMP58A
3 Sale region Refer to Suffix standard
4 Feature 21.5”/ 23.8” / 27” WIDE LCD MONITOR
5 Chassis Name LM68A LM69A
LM6AA
xxMP58VQ
xxMP58D
xxMP58A
6
General
Scope
External SW
&Adj. Joystick OSD (Menu, Picture Mode, Input, Power off)
Function
OSD,DDC2B,DDC2AB, HDCP, Control Lock,
Original Ratio / Wide, Black level, Smart Energy Saving
Screen Split, SUPER RESOLUTION+，Color Wizard,
Reader mode, LG Color Cloning, Black Stabilizer
7 Input
D-SUB IN RGB Analog
xxMP58VQ
xxMP58D
xxMP58A
1ea at the back
DVI IN DVI IN xxMP58VQ
xxMP58D
1ea at the back
HDMI IN HDMI IN xxMP58VQ
1ea at the back
HP OUT Audio L/R OUT xxMP58VQ
1ea at the back
8
Power Cord
Length : 1.5±0.05 M
Shape : Wall-out
Color : Black
Refer to Suffix
standard and power
cord table
9 Cable
Signal Cable
(D-SUB)
Length : 1.5m
Shape : Detachable Type
Color : Black
Pin : Triple Row, 15 Pin D-Sub
MP58VQ/D/A :
Refer to Suffix
standard
Signal Cable
(DVI)
Length : 1.5m
Shape : Detachable Type
Color : Black
Pin : Triple Row, 24 Pin DVI
MP58VQ/D/A :
Do not Support
Signal Cable
(HDMI)
Length : 1.5m
Shape : Detachable Type
Color : Black
Pin : 19Pin HDMI
MP58VQ :
Refer to Suffix
standard
MP58D/A :
Do not Support
Audio
Length : 1.5
Color:Black ,
Pin:2P
MP58VQ/D/A :
Do not Support
TV Length : ,Shape : ,Color: ,Pin MP58VQ/D/A :
Do not Support

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
SPECIFICATIONS
1. General Specification
10 Power
Input: AC100~240V 50~60Hz,1.0A Max ; DC 19V 1.6A;
DC 19V 1.3A
Output: DC 19V 1.7 A
Output: DC 19V 1.3 A
MP58VQ/D/A :
(22/24MP58VQ/A/A
use
1.3A ,27MP58VQ/D/A
use 1.7 A)
Refer to Suffix
standard
11
Applied Panel List
P/N: EAJ63109401 LM215WF3-SJJ5 22MP58VQ/D/A
P/N: EAJ62570001 LM238WF1-SJE1 24MP58VQ/D
P/N: EAJ63370101 LM270WF5-SJN1 27MP58VQ
Applied BLU List
P/N: EBV61138104 22MP58VQ/D/A
P/N: EBV61158009(BLACK)
P/N:EBV61158010(WHITE) 24MP58VQ/D
P/N: EBV61138207(BLACK)
P/N:EBV61138208(WHITE) 27MP58VQ
2. Mechanical specification
No Item Content Remark
1 Product
Dimension
Width (W) Length (D) Height (H)
Before Packing 634.1mm
634.1 mm
204.7 mm
91.1mm
469.5 mm
382.7 mm
With stand
Without stand
After Packing 703 mm 446 mm 135 mm
2 Product
Weight
Only SET 4.3kg
With BOX 6.0kg

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
3. Optical Character
No Item krameRairetirC
1 Viewing Angle
<CR≥10>
Horizontal(R/L) : 170(Min), 178(Typ)
Vertical(Top/Bottom) : 170º(Min), 178º(Typ)
2 Luminance(휘도) Max Luminance 200(min), 250(Typ)
(Full white pattern, 0.7V) Custom
6500K Luminance 200 (min)
(Full white pattern, 0.7V) Warm
8000K Luminance 180(min)
(Full white pattern, 0.7V) Medium
9300K Luminance 150(min)
(Full white pattern, 0.7V) Cool
Luminance
Uniformity ,)nim(%57
3 Contrast Ratio(명암 비) 600(MIN), 1000(TYP), DFC->5,000,000:1 (Typ.)
4 Response Time
-.Off : 14ms
-. Low : 9 ms ~ 11 ms
-. Middle : 7 ms ~ 9 ms
-. High : 5 ms ~ 6.5 ms
5 Light Leakage Condition: Do not visible at 300 Lux
6
CIE Color
Coordinates
(색좌표)
Minimum Normal Maximum
White
WX Typ-0.03 0.313 Typ+0.03 Warm
(6500K)
WY 0.329
WX
Typ-0.03
0.295
Typ+0.03
Medium
(8000K)
WY 0.305
WX Typ-0.03 0.283 Typ+0.03 Cool
(9300K)
WY 0.298
WX
Typ-0.03
0.365 Typ+0.03 Read1
WY 0.360
WX
Typ-0.03
0.353 Typ+0.03 Read2
WY 0.367
RED RX
Typ-0.03
0.651
Typ+0.03 Warm
(6500K)
RY0.338
GREEN GX0.318
GY0.612
BLUE BX0.151
BY0.065

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
4. Engineering Specification
1 Supported Sync. Type Separate Sync., Digital
2 Operating Frequency
Analog/
Digital/
HDMI
Horizontal 30  83kHz Analog :
-. MP58VQ/D/A
Digital :
-. MP58VQ/D
HDMI :
-. MP58VQ
Vertical 56  75 Hz
3 Resolution
Analog/
Digital/
HDMI
Max. 1920×1080 @ 60Hz
Recommend 1920×1080 @ 60Hz
4 Input Voltage Voltage :100 – 240 Vac, 50 or 60Hz, 1.0A
5 Inrush Current Cold Start : 50 A Hot : 120 A
6
Operating Condition Sync
(H/V) Video LED Wattage
On Mode On/On Active White
22MP58VQ/D/A
typ: 24(W)
max:28(W)
24MP58VQ/D
typ: 26(W)
max:30(W)
27MP58VQ
typ: 29(W)
max:34(W)
Test condition
1.1920x1080@60Hz
2. burst pattern
3. 100~240V
4. After aging 30min
Sleep Mode
Off/On
On/Off
Off/Off
Off White Blinking
<0.3W
(this spec have
to meet all inch)
측정방법) 제어판 Æ전원
옵션에서 디스플레이 끄기
와PC를절전모드로 하기
두가지 설정이 있는데, PC
를절전모드로 하기만 선
택하고 측정해야 함.
Off Mode
(Power switch off) - - Off
<0.3W
(this spec have
to meet all inch)
Smart Energy Saving
High
/Low/O
ff
Low White
Efficiency :
Low:10%~20%
High:20%~30%
Low:>1W(22)
Low:>2W(24/27)
High:>3W(22)
High:>4W(24/27)
-Test Condition
(1)
EPA
22MP58VQ/D/A
<20(W)
24MP58VQ/D
<24(W)
27MP58VQ
<27(W)
200nits ：margin >7%
Worst :margin>0

- 9-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
7
MTBF 30,000 HRS with 90%
Confidence level
Lamp Life : 30,000 Hours(Min)
8
Using Altitude 5,000 m (for Reliability) 3,000m(for FOS)
9
Environmen
t
Condition
0peratin
g Temperature 10 °C ~ 35 °C
Humidity 10% ~ 80%
Storage Temperature -20 °C ~ 60 °C
Humidity 5% ~ 90% non-condensing
OSD
Menu
Quick
Settings
Brightness 0~100 ,
Contrast 0~100
Volume 0~100 Only HDMI

-10 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Ratio Original/Wide Except 16:9 Ratio
SES Off/Low/High
Picture
Picture Mode Custom/Reader1/Reader2/Photo/
Cinema/Color Weakness/Game
Picture Adjust
SUPER
RESULUTION+
Off/Low/
Middle/High
Sharpness 0~100
Black Level Low/High Only HDMI
RGB format – High
YCbCr format - Low
Response Time Off/Low/Middle/
High
Overscan Off/On Only HDMI
DFC Off/On
Black Stabilizer 0~100
Color Adjust
Gamma Off/Gamma0/Gam
ma1/Gamma2
Color Temp Custom/Warm/Me
dium/Cool
Red 0~100
Green 0~100
Blue 0~100
Six Color 0~100 All Hue &
Saturation
Reset Reset/Cancel
Display
Horizontal 0~100
Only D-sub
Vertical 0~100
Clock 0~100
Phase 0~100
General
Language
English, Germanic, French, Spanish,
Italian, Swedish, Finnish, Portuguese,
Polish, Russian, Greek, Chinese,
Japanese, Korean, Ukrainian,
Portuguese(brazil), Hindi
Total 17ea
Depend on
BOM suffix
(Country)
Power LED Off/On
Automatic
Standby
4Hr – EU, EK, PD, MA, EW
Off / 4H / 6H / 8H
Depend on
BOM suffix
(Country)
Resolution Off/similar resolution Only D-sub
OSD Lock Off/On
Auto Configuration Cancel/Yes Only D-sub input
Reset Reset/Cancel

- 11 -
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 )
(3) Cosmetic Spec. : LCD Module IIS Spec.
C
5.1 Display Area
Activearea
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
No Item Content Remark
Maker LGD
Type TFT
Active Display Area 23 inches(58.42 cm) diagonal
Pixel Pitch [mm] 0.2652 mm x 0.2652(V) mm
Electrical Interface 2ch-LVDS
Color Depth 6-bit with A-FRC, 16.7M colors
LCD Module
1 Size (Outline) [mm] 527(H) x 309.8 (V) x 8.9 (D) mm
Feature Hard coating(3H), Anti-glare treatment of
Surface Treatment the front polarizer
Operating Mode Transmissive mode, normally Black
Back light Unit White LED
Typical 14ms
R/T Max. 25ms
6
CIE Color
Coordinates
(색좌표)
Minimum
Normal
Maximum
White
WX
Typ-0.03
0.313
Typ+0.03
Warm
(6500K)
WY
0.329
White
WX
Typ-0.03
0.302
Typ+0.03
Medium
(8000K)
WY
0.311
White
WX
Typ-0.03
0.283
Typ+0.03
Cool
(9300K)
WY
0.298
White
WX
Typ-0.03
0.365
Typ+0.03
Read1
WY
0.360
White
WX
Typ-0.03
0.353
Typ+0.03
Read2
WY
0.367
Red
RX
Typ-0.03
0.653
Typ+0.03
RY
0.337
Green
GX
0.322
GY
0.611
Blue
BX
0.153
BY
0.061

- 12-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
6. EDID
6.1 2
6.2 EDID Ver. 1.3 FOR ANALOG
** Protocol : DDC 2AB
6.4 EDID Ver.1.3 FOR HDMI (256Byte)
No Item Content 16진Data
1 Manufacturer ID GSM 1E 6D
2 Product ID
(Analog)
(DVI)
(HDMI)
23222 (5AB6)
23223 (5AB7)
23224 (5AB8)
3 Year 2014
4 Version 1 01
5 Revision
Analog : 3
Digital: 3
HDMI: 3
03
6 Serial Number * *
7 Week ** **
8 Model Name LG IPS Full HD
9 Check Sum **** ****
10 Special Item Need to Input Serial Number

- 13 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TIMING CHART
(1) Signal(Video & Sync)
Video
B
C
Sync
DEF
A
(2) H/V Timing
zD-SUB/DVI DTV Mode is not supported (interlace mode)
MODE
CLASSIF
ICATION
Polar
ity
DOT
CLOCK
[MHz]
Frequency
[kHz]/
[Hz]
Total
Period
(E)
Display
(A)
Front
Porch
(D)
Sync.
(C)
Back
Porch
(B)
Resolution
1
H(Pixels)
-
28.321
31.468
900
720
18
108
54
720 X 400
V(Lines)
+
70.08
449
400
12
2
35
2
H(Pixels)
-
25.175
31.469
800
640
16
96
48
640 x 480
V(Lines)
-
59.94
525
480
10
2
33
3
H(Pixels)
-
31.5
37.5
840
640
16
64
120
640 x 480
V(Lines)
-
75
500
480
1
3
16
4
H(Pixels)
+
40.0
37.879
1056
800
40
128
88
800 x 600
V(Lines)
+
60.317
628
600
1
4
23
5
H(Pixels)
+
49.5
46.875
1056
800
16
80
160
800 x 600
V(Lines)
+
75.0
625
600
1
3
21
6
H(Pixels)
-
65.0
48.363
1344
1024
24
136
160
1024 x 768
V(Lines)
-
60.0
806
768
3
6
29
7
H(Pixels)
+
78.75
60.023
1312
1024
16
96
176
1024 x 768
V(Lines)
+
75.029
800
768
1
3
28
8
H(Pixels)
+
108.0
67.500
1600
1152
64
128
256
1152 x 864
V(Lines)
+
75.000
900
864
1
3
32
9
H(Pixels)
+
108.0
63.981
1688
1280
48
112
248
1280 x 1024
V(Lines)
+
60.02
1066
1024
1
3
38
10
H(Pixels)
+
135.0
79.976
1688
1280
16
144
248
1280 x 1024
V(Lines)
+
75.035
1066
1024
1
3
38
11
H(Pixels)
-
146.25
65.290
2240
1680
104
176
280
1680 x 1050
V(Lines)
+
59.954
1089
1050
3
6
30
12
H(Pixels)
+
148.50
67.50
2200
1920
88
44
148
1920 x 1080
V(Lines)
+
60
1125
1080
4
5
36

- 14-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Factory support
mode
(Preset Mode)
Horizontal
frequency
(KHz)
Vertical
frequency
(Hz)
HDMI
1
480P
31.5
60
O
2
576P
31.25
50
O
3
720P
37.5
50
O
4
720P
45
60
O
5
1080i
28.12
50
O
6
1080i
33.75
60
O
7
1080P
56.25
50
O
8
1080P
67.5
60
O
(Recommend Mode)

ADJUSTMENT
- 15-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Coverage
Apply to 58.4 cm (23 inch) Wide monitor made in Monitor Factory
Gumi Korea) or made in accordance with the standard of Gumi
Factory process.
2. Appointment
2.1 Adjustment must be done as fixed sequence, and adjustment
sequence can be modified after agreement withthe responsible
R&D engineer considering mass-production condition.
2.2 Power : AC 100 - 240 Voltage (Free)
2.3
Input signal:
2.3.1 RGB Input: As Product Standard (Signal ROM : LB800K
Ver1.6)
2.3.2 RJ-45 input : As Product Standard (Ethernet connection
through network from Host PC)
* PC spec for MK(Minikey) Loader (TBD): CPU - Dual core 2.0
GHzD, Memory - 2 GByteD
*PC spec for Host PC (TBD): CPU - Dual core 2.0 GHzD,
Memory - 2 GByteD
2.4 Warm-up Time: Over than 30 minutes
2.5 Adjustment equipment : White balance equipment (CA-110),
Display adjust equipment, VG-813(or VG819), Oscilloscope,
PC (More than 486 computer ) & White balance adjust
program.
3. Adjustment
3.1 Overview
Use factory automation equipment and adjust automatic
movement. But, do via passivity adjust in erroroccurrence.
3.2 Adjustment order
(refer to the Adjustment standard and adjustment command table)
3.2.1 Board Assembly Line
3.2.1.1 15pin D-sub (RGB)
· Connect input signal to 15pin D-sub.
· Check the firmware version & model name. And write the
firmware code to the serial Flash ROM by ISP.
· Ready for adjustment : check whether adjustment command
works normally or not and the operating state of each mode.
· Check the display state of gray color when 256 gray scale
patterns is embodied.
· Read by EEPROM Read Command to check whether initial
value is correct or not.
3.2.1.2 MK( Minikey ) Loading
· Open MK Loader Tool on MK Loader PC.
( * MK Loader PC should be connected Internet)
· Connect input signal to RJ-45 input with LAN cable connected
network devices such as routers.
· Turn on the Monitor set.
· Click the box when the °∞empty port °∞box is changed to “write
mini-key” in MK Loader Tool.
3.2.1.2 RJ-45 input
· Connect input signal to RJ-45 input with LAN cable connected
network devices such as routers.
· Check USB 1.1 Port (Keyboard/ Mouse) : @RJ-45 input
· Check USB 2.0 Port (USB Memory Stick 2port) : @RJ-45 input
· Check Audio (Ear-phone out/ Mic in/ Speaker) : @RJ-45 input,
PC audio volume : MAX
* LAN cable
* Router
* PC: vSpace S/W for N+ ( Ver 4.5.xx.xx ) --- Caution: Ver
4.4.xx.xx for N1742L family
3.2.2 Total Assembly Line
· Ready : Heat-run during5 minutes in the state with signal
· Connect input signal to D-sub.
· Default value before adjustment : Contrast “70” , Brightness
‘100(Max)”
3.2.3 Adjustment of Horizontal/Verticality screen
position, Clock and Clock Phase at each Mode.
· There is no special factory mode adjustment. Writing initial value
of EEPROM in Board Assembly line is adjusting Preset Mode
and Reset mode. (EEPROM is initialized when AC Power is
ON first.)
· If the change of FOS data is needed after M.P, it is possible by
writing Mode Data with EEPROM write command or modifying
the Mode Data in MICOM itself.
3.2.4 Color coordinates adjustment and Luminance
adjustment.
3.2.4.1 Color coordinates adjustment
· Monitor Contrast / Brightness
- Contrast : 70
- Brightness : 100(Max)
· CA-110: Set “channel 9”
· Signal Generator : At cut-off and drive --> 16 step pattern for
ADC (Program No.: 31)
- Output Voltage : 700 mVp-p
- Output Mode : Mode 12 (SXGA 60 Hz)mode Setting.
3.2.4.2.Adjustment : Board Assembly Line
· Select RGB mode
· Input 16 step pattern for ADC (Program No.31 (Mode 12,Pattern
11)). (Video level : 700 mVp-p)
· Adjust by commanding AUTO_COLOR_ADJUST
· Confirm “Success” message in Screen or Check the data of
0xFE, 0xFF address of EEPROM(0XA6) is 0xAA after waiting 5
seconds.
· If there is “FAULT” message or the data of 0xFE, 0XFF address
of EEPROM(0xA6) is not 0xAA, do adjust again.
· If all Adjustment is completed, the values of 6500K, User Color
and 9300K are saved automatically.
· Select RGB mode
· Input 16 step pattern for ADC (Program No.31 (Mode 12,Pattern
11)). (Video level : 700mVp-p)
· Adjust by commanding AUTO_COLOR_ADJUST
· Confirm “Success” message in Screen or Check the data of
0xFE,0xFF address of EEPROM(0xA6) is 0xAA after waiting 5
seconds.
3.2.4.3. Confirm at Total Assembly Line: adjustment
· Check the data of 0xFE, 0xFF address of EEPROM(0xA6) is
0xAA.
· If the data of 0XFE, FF address of EEPROM(0xA6) is not
0xAA, do adjust again by 3.2.4.2.

- 16-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
3.2.4.4. Confirm PRESET 6500K Color coordinates and Adjust
PRESET 9300K Color coordinates .
· Set as Aging mode ON, by commanding AGING_ON/OFF
command code.
· Select Module that is being used in present production by
commanding MODULE SELECT. ( It is not needed so far.
However, it will be needed to apply other modules)
· Send SYSTEM RESET command to set Module data.
· Input Full White Pattern (Video level : 700 mVp-p)
· Set as 9300K by commanding COLOR_MODE_CHANGE
Command code.
· Check to meet x = 0.283 ± 0.03, y=0.298 ± 0.03, and confirm.
· Only if it does not meet, adjust as below steps.
· Adjust to meet x = 0.283 ± 0.01, y=0.298 ± 0.01 in 5 minutes. and
confirm.
· Save 9300K Color by commanding COLOR SAVE Command
code.
· Set as 6500K by commanding COLOR_MODE_CHANGE
Command code.
· Check to meet x = 0.313 ± 0.03, y=0.329 ± 0.03, and confirm.
· Only if it does not meet, adjust as below steps.
· Adjust to meet x = 0.313 ± 0.01, y =0.329 ± 0.01, and confirm.
· Save 6500K Color by commanding COLOR SAVE Command
code.
· Set as sRGB by commanding COLOR_MODE_CHANGE
Command code.
· Adjust to meet Y = 150 ± 50, and confirm.
· Save sRGB Color by commanding COLOR SAVE Command
code.
3.2.4.5. Confirm User color coordinates .
· Confirm Whether User color is saved same as 6500K.
· After confirming Color coordinates, Must return to 6500K
3.2.5 Confirm Operation state.
3.2.5.1 Operation mode : Confirm whether each appointed mode
operate correctly or not.
3.2.5.2 Confirmation of Adjustment condition and operation :
Confirm whether it meet Auto/Manual equipment Adjustment
standard or not.
· Confirm Analog screen state : Confirm screen state at below
mode.
Appointment mode (RGB input):
640*480 @60Hz (Mode 1),
800*600@75Hz(Mode 5),
1024*768@60Hz(Mode 8),
1280*1024@60Hz(Mode 12),
SMPTE pattern(Check 0%,5%,95%,100%)
–Mode can be added.
3.2.5.3. Confirm Auto adjustment operation.
· Input Analog 1 Dot on/off & Rectangle Pattern at Mode
12(1280x1024@60 Hz)
· Confirm adjustment operation by changing Clock, Phase, H/V
Position.
· Check Clock, Phase by pressing AUTO Key.
· Confirm first set of new lot by periods
3.2.5.4 Other quality
· Confirm that each items satisfy under standard condition that was
written product spec.
· Confirm Applying Module & MICOM Setting --> Confirm with
Service OSD
- Confirm at Service OSD by “Menu + Power key” on .(from
Power off)
- Confirm first set of new lot by periods, and confirm periodically
when there is Process change or Adjustment setting change.
3.2.5.5. OSD & Adjustment device Confirmation : Confirm
operation mentioned as product spec.
· Vary Brightness and Contrast and confirm the variation of
Luminance and display status.
· Operate the f-engine function and confirm variation of Luminance.
· Make sure to do FACTORY RESET after confirmation of OSD
function.
3.2.5.6. Confirm the display state by inputting 8 color Bar Pattern &
256 Gray Scale pattern.
3.2.5.7. DPM operation confirmation : Check if Power LED Color
and Power Consumption operates as standard.
· Measurement Condition : 230 V@ 50 Hz (Analog)
· Confirm DPM operation at the state of screen without Video
Signal.
3.2.5.8. RJ-45 input
· Connect input signal to RJ-45 input with LAN cable connected
network devices such as routers.
· Check USB 1.1 Port (Keyboard/ Mouse) : @RJ-45 input
· Check USB 2.0 Port (USB Memory Stick 2port) : @RJ-45 input
· Check Audio (Ear-phone out/Mic in/Speaker) : @RJ-45 input, PC
audio volume : MAX
* LAN cable
* Router
* PC: vSpace S/W for N+ ( Ver 4.5.xx.xx ) --- Caution: Ver
4.4.xx.xx for N1742L family
3.2.5.9. DDC EDID Write
( Set as Aging mode ON, by commanding AGING_ON/OFF
command code. )
1) SUFFIX: xxxxxPN
· Connect analog Signal Cable to D-sub wafer.
· Write EDID DATA to EEPROM(24C08) by using DDC2AB
protocol.
· Check whether written EDID data is correct or not.
(refer to Product spec).
--> After writing EDID, send Elapsed Time Clear command.
(Elapsed time should not be displayed, after EDID writing)
: Confirm periodically (in the first set of new lot, process change)
whether module name and aging time disappeared on the self-
diagnostics OSD with signal cable disconnected.
--> If Elapsed Time Clear command isn°Øt executed, module
name, aging time and TCO word appear on the self-diagnostics
OSD.(Module name and aging time should not appear after
writing EDID)
--> Make sure to do FACTORY RESET at the final process.
3.2.5.10. Shipping condition
· Contrast : 70
· Power Switch : Off
· Brightness : “100(Max)”
· Color Select : Preset ( 6500K )
· Language Select : Refer to product spec.
· OSD Position : Center
· Power indicator : ON
· Flatron f-engine : Normal

- 17-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
4.Standard of Auto/Manual equipment adjustment
*Check items No. 2, 3, 4, 5 and 7 at RGB input.
No
.
Item Adjustment & measurement
standard
Operation
mode
Operation
Pattern
Measurement
Position
1 Voltage(V) 12 V± 0.6 V
5V± 0.3V / 3.3V± 0.25V
2.5V± 0.2V
MODE 13 Pattern4 TP of
Each power
2 Color
coordinates
(9300/6500K)
Black
Level Auto Adjustment MODE 12 Pattern 0 Center
of Screen
u uí= 0.198 ± 0.00 5
Color
coordinates
(6500K)
DRIVE1
v ví=0.468± 0.005
Color
coordinates
(9300K)
DRIVE2
X
Y
0.283± 0.004
0.298± 0.004
MODE 12 Pattern1
Center
of Screen
3
Luminance 6500K More than
220 cd/m2
MODE 12
(700 mVp-p)
Pattern1 Center
of Screen
H4 Screen
Position V
FULL SIZE MODE
1 - 13 Pattern4 Full Screen
CLOCK
PHASE
FULL SIZE MODE
12-13
Pattern 4 Full screen 5 Screen
Compensation
AUTO FULL SIZE MODE
12-13
Pattern 4 Full screen
Normal Mode 40W(Typ) Pattern 4 Blue
Stand By Mode 1W/- Pattern 6
Flicker
Suspend Mode 1W/- Pattern 7 Flicker
DPMS Off 1W/15W Pattern 8 Flicker
6 DPM
Confirmation
(RGB/LAN)
Power Switch
Off
1W
MODE 12
off
7 Gray scale Confirmation Linear gray Scale MODE 12 Pattern 9 Full screen
8 Withstanding Voltage
confirmation
When 1500Vac or 2121Vdc is
impressed between the first of
power (Live/Neutral) and
ground (Earth) for 1 second,
check whether something
wrong happens or not.
9 Ground Confirmation
When 25A is impressed
between Earth and 2nd Ground
for 1 second, Resistance must
be less than 0.1
10 Cutoff /ADC Adjustment Pattern 16 step pattern for ADC
1280*1024@60Hz (700mVp-p) MODE 12 Pattern11
11 Network Test with PC
CPU : Dual core 2.0 GHz ,
Memory : 2 GByte ,
Teradiciís PCoIP Host Card
LAN cable
1280 * 1024

- 18-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
5. Pattern for Adjustment
Pattern 0 : FULL BLACK (State of without video signal )
Pattern 1 : FULL WHITE (Don’t display other Character except for White Pattern)
Pattern 3 : FULL WHITE
Pattern 4 : Cross hatch pattern (Horizontal 10Line, Vertcial 8Line) & Rectangle Pattern
Pattern 5 : 1 Dot on, 1 Dot off & Rectangle Pattern
Pattern 6 : Vertical Sync only input (Use signal cable of which Pin #5 is GND)
Pattern 7 : Horizontal Sync only input (Use signal cable of which Pin #5 is GND)
Pattern 8 : State of without Vertical/Horizontal Sync and Video Signal. (Use signal cable of which Pin #5 is GND)
Pattern 9 : 8 Color Bar Pattern + 16 Gray Level Pattern
Pattern 10 : SMPTE Pattern
Pattern 11 : 16 Gray Step Pattern (700mV)

BLOCK DIAGRAM (Main)
- 19-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only