LG Flatron W2486L User manual

P/NO : MFL61938704 (0904-REV00) Printed in Korea
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. : LM95A
MODEL: W2486L W2486L-PFV
Internal Use Only

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Copyright 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 .......................................................................................10
ADJUSTMENT .........................................................................................11
BLOCK DIAGRAM...................................................................................14
TROUBLE SHOOTING ............................................................................15
EXPLODED VIE .................................................................................. 19
SVC. SHEET ...............................................................................................

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Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
PRECAUTION
ARNING 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 ITH
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.)
ARNING
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
Replaceable batteries
* CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN
INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE
INSTRUCTIONS
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 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 PRECAUT ONS 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 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 I onnections
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 onnections
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 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 W2486L-PFV
3 Sale region World Wide
4 Feature 24” LCD MONITOR
5 Chassis Name LM95A
6 General External SW &Adj. Smart, Fun, Menu, F-engine( ),Source( ) Auto/Select, Power
Scope Function OSD, DDC2B, DDC-CI, HDCP, Control Lock, sRGB, f-Engine, ARC,
RTC, Auto bright, Over scan, ez zooming, photo effect,
4:3 in wide, headphone out, black level,
7 Power Cord Length : 1.87±0.05 M
Shape : Wall-out
Color : Black
Signal Cable Length : 1.8±0.03M
(D-SUB) Shape : Detachable Type
Color : Black
Pin : Triple Row, 15-Position Sub-miniature D
8 Cable Signal Cable Length : 2.0±0.03 M
(DVI) Shape : Detachable Type
Color : Black
Pin : Triple Row, 18-Position DVI-D
9 Adqpter Input: AC100~240V 50~60Hz, 1.0A Max
10 Applying module list Model P/No Specification
EAJ60678401 M240HW01 v1
No Item Content Remark
Width (W) Length (D) Height (H)
1 Product Before Packing 577.4 198.4 440.5 With stand
Dimension 577.4 84.1 430 Without stand
After Packing 654 492 126
2 Product Only SET 4.7 Kg
Weight With BOX 7.2 Kg
3 Container Individual or 20ft 40ft
Loading Palletizing Indi. Pallet Indi. Pallet
Quantity 684 576 1512 1344
Type Attachable(Tilt Only)
4 Stand Size (W x D x H) 256.1 * 198.4 * 26.6
Assy Tilt Degree -2°(±2) ~ 15°(±3)
Tilt force 0.8~2.5 kgf
Swivel Degree N/A
Swivel Force N/A
5 Appearance General Refer to Standard of LG(56)G2-1011
2. Mechanical specification

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Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
3. Optical Character
No Item Criteria Remark
1 Viewing Angle Horizontal(R/L) : +75º/-75º(min), +85º/-85º(Typ.)
<CR ≥10> Vertical(Top/Bottom) : +70º/-70º(min), +80º/-80º (Typ.)
2 Luminance Minimum 180(min) 6500K
Luminance(cd/m 2 ) (Full white pattern, 0.70V)
Brightness
Uniformity 75%(min)
3 Contrast Ratio 600(Min), 1000(Min) DFC-> 1,000,000:1(Min)
4 Response Time On/off:5ms(TYP), Gray to Gray: 2ms(TYP)
5 Light Leakage Condition: Do not visible at 300 Lux
4. Engineering Specification
1 Supported Sync. Type Separate Sync., SOG, Digital Remarks
2 Operating Frequency Analog/ Horizontal 30 ~ 83kHz
Digital Vertical 56 ~ 75 Hz
HDMI Horizontal 28 ~ 83kHz
Vertical 48 ~ 61 Hz
3 Resolution Analog/ Max. 1920x1080 @ 60Hz
Digital Recommend 1920x1080 @ 60Hz
HDMI Max. 1920x1080 @ 60Hz
Recommend 1920x1080 @ 60Hz
4 Input Voltage Voltage : 100 – 240 Vac, 50 or 60Hz
5 Inrush Current Cold Start : 50 A Hot : 120 A
Operating Condition Sync(H/V) Video LED Wattage
Test condition
32W (Max) 1. 1920x1080 @ 60Hz
6 On Mode On/On Active RED 28W (typ) 2. burst pattern
3. 100~240V
4. After aging 30min
Off/On
Sleep Mode On/Off Off blinking 1W
Off/Off
Off Mode - - Off 1W
(Power switch off)
7 MTBF 50,000 HRS with 90% Lamp Life : 50,000 Hours(Min)
Confidence level
8 Using Altitude 5,000 m (for Reliability) 3,000m(for FOS)
Temperature 10 °C ~ 35 °C
9 Environment 0perating Humidity 10% ~ 80%
Condition Storage Temperature -20 °C ~ 60 °C
Humidity 5% ~ 90% non-condensing

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Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
5. LCD Panel Characteristic
(1) Standard Measurement Condition
Ambient Luminance Level : dark ( < 10 lux)
Ambient Temperature : Normal Temperature(10 ~ 25ºC)
warm-up Time : More than 30min (at Full White Pattern)
Input Signal : VESA 1920X1080+ 60Hz
Contrast : 70 (But, the contrast is 100 when we check response time)
Brightness : Max. 100
6500K : Color Temperature Setting is 6500 K( if it’s not special specification)
Clock/Clock Phase : The Best Setting
(2) Another Spec.: Product Specification Standard( LG(55)G1-1034 )
(3) Cosmetic Spec. : LCD Module IIS Spec.
5.1 Display Area
1) Active Display Area of the LCD Monitor Should be within Cabinet’s Bezel.
2) Distance Difference between Active Area and Bezel
| A-B|<1.0 mm , | C-D|<1.0 mm
A: The Distance from The Left of Active Area to the 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
C
B
D
A
Active Area
Bezel
No Item Content Remark
Maker AUO
Type TFT Color LCD Module
Active Display Area 24 inches (609.7mm)
diagonal (Aspect ratio 16:10)
Pixel Pitch [mm] 0.2767mm x 0.2767mm
1 LCD Module Electrical Interface 2ch-LVDS
Feature Color Depth 16.7M colors
(RGB 6-bit + Hi_FRC)
Size (Outline) [mm] 556.0(H) x 323.2(V) x 14.55(D) mm
Surface Treatment Anti-Glare, Hard Coating (3H)
Operating Mode Transmissive mode
Normally White
Back light Unit White LED
R/T Typical Rise Time: 3.4 , Fall Time: 1.6
Max. Rise Time: 7.4 , Fall Time: 2.6
Minimum Normal Maximum
White Wx 0.283
Wy Typ-0.015 0.298 Typ+0.015 9300K
2 CIE Color White u’ 0.313
Coordinates v’ Typ-0.015 0.329 Typ+0.015
Red Rx 0.635
Ry 0.349 6500K
Green Gx Typ-0.03 0.335 Typ+0.03
Gy 0.607
Blue Bx 0.146
By 0.058

6. EDID
6.1 EDID
6.2 Data (128 Bytes)
6.2.1 EDID Ver. 1.3 For ANALOG
6.2.2 EDID Ver. 1.3 For DIGITAL
6.2.3 EDID Ver. 1.3 For HDMI1
6.2.4 EDID Ver. 1.3 For HDMI2
- 9 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
No Item Content Hexadecimal Data
1 Manufacturer ID GSM 1E 6D
2 Product ID 22306(Analog) 5722
22307(Digital) 5723
22313(HDMI1) 5729
3 Year 2009 13
Analog : 1
4 Version Digital : 1 01
HDMI : 1
Analog : 3
5 Revision Digital : 3 03
HDMI: 3
6 Model Name W2486 --
7 Special Item White LED module

- 10 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Mode Dot
Clock
Classification Sync
Polarity Frequency Total
Period
( E )
Disply
( A )
Front
Porch
( D )
Sync.
( C ) Back porch( B ) Resolution
1 H(Pixels) - 31.468 900 720 18 108 54
V(Lines) + 28.321 70.08 449 400 12 2 35 720 X400
2 H(Pixels) - 31.469 800 640 16 96 48
V(Lines) - 25.175 59.94 525 480 10 2 33 640 x480
3 H(Pixels) - 37.5 840 640 16 64 120
V(Lines) - 31.5 75 500 480 1 3 16 640 x480
4 H(Pixels) + 37.879 1056 800 40 128 88
V(Lines) + 40.0 60.317 628 600 1 4 23 800 x600
5 H(Pixels) + 46.875 1056 800 16 80 160
V(Lines) + 49.5 75.0 625 600 1 3 21 800 x600
6 H(Pixels) - 48.363 1344 1024 24 136 160
V(Lines) - 65.0 60.0 806 768 3 6 29 1024 x768
7 H(Pixels) - 60.123 1312 1024 16 96 176
V(Lines) - 78.75 75.029 800 768 1 3 28 1024x768
8 H(Pixels) +/- 67.500 1600 1152 64 128 256
V(Lines) +/- 108.0 75.000 900 864 1 3 32 1152x 864
9 H(Pixels) + 63.981 1688 1280 48 112 248
V(Lines) + 108.0 60.02 1066 1024 1 3 38 1280 x1024
10 H(Pixels) + 79.976 1688 1280 16 144 248
V(Lines) + 135.0 75.035 1066 1024 1 3 38 1280 X1024
11 H(Pixels) + 64.674 1840 1680 48 32 80
V(Lines) - 119 59.883 1080 1050 3 6 21 1680 X1050
12 H(Pixels) - 65.290 2240 1680 104 176 280
V(Lines) + 146.25 59.954 1089 1050 3 6 30 1680 X1050
13 H(Pixels) + 67.50 2200 1920 88 44 148
V(Lines) + 148.50 60 1125 1080 4 5 36 1920 X1080
D-SUB/DVI DTV Mode is not supported (interlace mode)
TIMING CHART
VIDEO
SYNC
E
DB
C
A
(1) Signal(Video & Sync)
(2) H/V Timing
(3) HDMI Video input
Factory support mode Horizontal freq. Vertical freq.
(Preset Mode) (KHz) (Hz)
1 480P 31.5 60
2 576P 31.25 50
3 720P 37.5 50
4 720P 45 60
5 1080i 28.12 50
6 1080i 33.75 60
7 1080P 56.25 50
8 1080P 67.5 60 HDMI jack is for AV(video signal)

ADJUSTMENT
- 11 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Coverage
Apply to 24” Wide monitor made in Monitor Factory(Kumi
Korea) or made in accordance with the standard of Kumi
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 : AC100~240 Voltage (Free)
2.3 Input signal : As Product Standard ( Signal ROM: W2286l V0.1)
2.4 Warm-up Time : Over than 5 minutes
2.5 Adjustment equipment : White balance equipment (CA-
110/210), Display adjust equipment, VG-819(or VG828),
Oscilloscope, PC (More than 486 computer ) & White balance
adjust program.,HDCP Adjusting Jig equipment.
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
· Connect input signal to 15pin D-sub.
· 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
pattern is embodied.
· Read by EEPROM Read Command to check whether initial
value is correct or not.
3.2.2 Total Assembly Line
· Input analog signal. (1920x 1080@60Hz)
· Write HDCP Key to EEPROM(24C16) by using DDC2AB
protocol&HDCP Adjusting equipment [Address 0xAC 80, 289
btes]
· If error is occurred, write and check again.
· Ready : Heat-run during 5 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.
# Caution) Must keep power-on more than 3 seconds after AC
Power-on first time.
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-110/210: Set “Channel 7” ->
CA-110: channel8. CA-210: channel5
·
Signal Generator : At cut-off and drive ->
16 step pattern for ADC
- Output Voltage : 700 mVp-p
- Output Mode : Mode 13( WSXGA+ 60Hz )mode Setting.
3.2.4.2.Adjustment : Board Assembly Line
· Input 16 step pattern for ADC (Mode13, 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(0xAA) is not 0xAA, do adjust again
· If all Adjustment is completed, the values of 6500K, User Color
and 9300K are saved automatically.
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, 0xFF address of EEPROM(0xA6) is not
0xAA, do adjust again by 3.2.4.2.
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.
· 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.
· Adjust to meet x = 0.283 ± 0.004, y=0.298±0.004, and confirm.
· Save 9300K Color by commanding COLOR SAVE Command
code.
· Input Full White Pattern (Video level : 700 mVp-p)
· Set as 6500K by commanding COLOR_MODE_CHANGE
Command code.
· 6500K color adjustment
It’s not TCO model.
Don’t need to adjust 6500K color.
If this TCO 03 spec should be satisfied later, refer to below
method.
Adjust to meet x = 0.313 ± 0.007, y=0.329±0.007, and confirm.
* (Option)
It’s another method for 6500K color adjustment at Gumi & NT
At first, check ∆UV. If that is under 0.0065, the set is not adjusted.
If not. It is adjust to meet u’= 0.198±0.0065, v’=0.469±0.0065
· Set as sRGB by commanding COLOR_MODE_CHANGE
Command code.
· Adjust to meet Y = 180 ± 10, and confirm.

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Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
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
· Confirm whether user color is 50. If the value of user color(R/G/B)
is 30, do adjust again by 3.2.4.2.
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 equipement Adjustment
standard or not.
For W2086T
· Confirm Analog screen state : Confirm screen state at below
mode.
Appointment mode : 640*480 @60Hz (Mode 2),
800*600@75Hz(Mode 5), 1024*768@60Hz(Mode 6),
1280*1024@60Hz(Mode 9), 1680*1050@60HZ(Mode 11),
1920*1080@60HZ(Mode 12)
SMPTE pattern(Check 0%,5%,95%,100%) –Mode can be
added.
· Check HDCP signal screen by using Video generator that
generate HDCP signal
3.2.5.3. Confirm Auto adjustment operation.
· Input Analog 1 Dot on/off & Rectangle Pattern at
Mode12(1920*1080@60Hz)
· 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 : 230V@ 50Hz (Analog)
· Confirm DPM operation at the state of screen without Video
Signal.
3.2.5.8. DDC EDID Write
- HDMI part EDID data
· Confirm whether module selection is correct or not on the self-
diagnostics OSD with signal cable disconnected.
· Connect HDMI Signal Cable to DVI-D wafer.
· Write EDID DATA to EEPROM(24C02) by using DDC2B protocol.
· Check whether written EDID data is correct or not.
- DVI part EDID data
· Confirm whether module selection is correct or not on the self-
diagnostics OSD with signal cable disconnected.
· Connect Digital Signal Cable to DVI-D wafer.
· Write EDID DATA to EEPROM(24C02) by using DDC2B protocol.
· Check whether written EDID data is correct or not.
- Analog part EDID data
· Connect analog Signal Cable to D-sub wafer.
· Write EDID DATA to EEPROM(24C016) by using DDC2AB
protocol. [ Address 0xA6 00]
· 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’t 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.

- 13 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
5.Standard of Auto/Manual equipment adjustment
*Note 1 (Test condition):
- mode12(1920x1080 @60Hz)
- Burst pattern
- 100V ~ 240Vac
- Analog & Digital
- After aging 30min
4. Pattern for Adjustment
Pattern 0 : FULL BLACK (State of without video signal )
Pattern 1 : FULL WHITE (Don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)
No . Item Adjustment & measurement Operation Operation Measurement
standard mode Pattern Position
1 Voltage(V) 5V± 0.3V / 3.3V±0.25V, 1.8V± 0.07 MODE 12 Pattern4 TP of Each power
2 Color coordinates Black Level Auto Adjustment MODE 13 Pattern 0 Center of Screen
(9300/6500K)
3 Color coordinates DRIVE1 X 0.313±0.004
(6500K) Y 0.329±0.004 MODE 13 Pattern1 Centerof Screen
u’ 0.198±0.02
v’ 0.468±0.02
Color coordinates DRIVE2 X 0.283±0.004
(9300K) Y 0.298±0.004
Luminance 6500K More than 210cd/m2 MODE 13 Pattern1 Center of Screen
(700mVp-p)
4 Screen Position FULL SIZE MODE 1–13 Pattern4 Full Screen
5 Screen Clock phase FULL SIZE MODE 13 Pattern 4 Full screen
Compensation AUTO FULL SIZE MODE 13 Pattern 4 Full screen
6 DPM On Mode 32W(Max) MODE 13 note1 RED
Confirmation 29W(typ)
Sleep Mode ≤1W Pattern 6/7/8 Blinking
Off Mode ≤1W Off
7 SOG signal Confirmation Input SOG signal MODE 13 Pattern 9 Full screen
8 Gray scale Confirmation Linear gray Scale MODE 13 Pattern 9 Full screen
9 Withstanding Voltage When 1500Vac or 2131Vdc is impressed between the first of power (Live/Neutral) and ground
(Earth) for 1 second, check whether something wrong happens or not.
10 Ground Confirmation When 25A is impressed between Earth and 2 nd Ground for 1 second, Resistance must be less
than 0.1 Ω
11 Cutoff/ADC Adjustment Pattern 16 step pattern for ADC MODE 13 Patten11
1600 * 900 (700mVp-p) W2086T

BLOCK DIAGRAM
- 14 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Touch
Control
MCU(8032 core)+PLL
TSUMO88GDI-LF(22”) TSUMU88EDI-LF-1(24”)
D-Sub
DVI
EEPR M
24C02
EEPR M
24C02
HDMI
Analog
R/G/B
TMDS
ADC Scaling
up/dow
n
SD ,LUT digital
Memory
(FRC)
LVDS
TMDS
WLED Module
HDMI
Rx
EEPR M
24C16
CS43L21
Audio DAC
Headphone
ut
Flash memory
2M
SDA/
SCL
SDA/
SCL
SDA/
SCL
Headphone
R/L
SDI/SCK/
SD
HDMI
SCK/MCLK/SD/LRCK
Vcc
5V
3.3V
5V
5V
3.3V
3.3V
3.3V 1.8V
3.3V
Adapter
12V
Regulator
Regulator
3.3V
1.8V
Crystal
14.171MHz
Xin / Xout
Brightness
Sense
2 pairs
LED driver
block
DC-DC
V
12V 22”:32V, 24”:42V and LED
string 6ea
TMDS switch
TMDS 361PAG

TROUBLESHOOTING GUIDE
- 15 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. NO PO ER
NO POWER
(POWER INDICATOR OFF)
CHECK IC101
NO
NO
NO
4PIN OF JK300( 12V)
CHECK ADAPTER AND FIND OUT A
SHORT POINT AS OPENING EACH
POWER LINE
CHECK IC302 PIN2( 3.3V)
CHECK REGULATOR AND FIND
OUT A SHORT POINT AS OPENING
EACH POWER LINE
CHECK POWER (3.3V) AND I2C
LINE OF CONTROL ASSEMBY
CHECK ADAPTER
INPUT VOLTAGE
4PIN OF JK300( 12V)
CHECK IC301
PIN2 (1.8V) AND
CHECK IC302
PIN2(3.3V)
CHECK CONTROL
ASSEMBLY OPERATION
YES
YES
YES
NO
CHECK CRYSTAL( X101)
CHECK PULSE OF IC101
P25, P26
YES

- 16 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER
NO RASTER
(OSD IS NOT DISPLAYED)
NO
NO
NO
CHECK voltage (24”: 46.2V typ,
22”: 29.25V typ) of lamp wire
of the LCD module
CHECK ADAPTER AND FIND OUT
A SHORT POINT AS OPENING EACH
POWER LINE
CHECK REGULATOR AND FIND OUT
A SHORT POINT AS OPENING EACH
POWER LINE
CHECK THE LINES BETWEEN IC101
AND IC 400
CHECK ADAPTER
INPUT VOLTAGE 4PIN
OF JK300( 12V)
CHECK IC301
PIN2(1.8V) AND
CHECK IC302 PIN2(3.3V)
CHECK PIN 10( 3.3V)
AND PIN 11( DIMMING)
OF IC101
YES
YES
YES
NO CHECK IC 400 AND Q407 OPERATION
CHECK FET( Q407)
SWITCHING OPERATION
YES

- 17 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
3. NO RASTER (OSD IS NOT DISPLAYED) – Mstar
NO RASTER
(OSD IS NOT DISPLAYED)
NO
NO
NO
TROUBLE IN CABLE OR
LCD MODULE
CHECK ADAPTER AND FIND OUT
A SHORT POINT AS OPENING EACH
POWER LINE
CHECK REGULATOR AND FIND OUT
A SHORT POINT AS OPENING EACH
POWER LINE
CHECK CRYSTAL( X101)
CHECK ADAPTER
INPUT VOLTAGE 4PIN
OF JK300( 12V)
CHECK IC301
PIN2(1.8V) AND
CHECK IC302 PIN2(3.3V)
CHECK PULSE OF
IC101 P25, P26
YES
YES
YES
NO CHECK CONNECTION LINE FROM
IPUT SIGNAL LINE
CHECK h sync and v sync
of input line( RGB, DVI
,HDMI1,HDMI2 )
YES

- 18 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
4. TROUBLE IN DPM
TROUBLE IN DPM
NO
CHECK IC 101
CHECK CONNECTION LINE
FROM IPUT SIGNAL LINE
YES
CHECK h sync and v
sync of
input line( RGB, DVI
,HDMI1,HDMI2 )

- 19 -
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
300
200
400
900
530 540 800
510
520
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts
are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as recommended
in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE

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Copyright ⓒ 2009 LG Electronics. Inc. All right reserved.
Only for traning and service purposes
LGE Internal Use Only