LG 55WT30MS User manual

North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
Printed in KoreaP/NO :
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
MFL63725120 (1312-REV00)
55WT30MS 55WT30MS-BL
LW36D
MONITOR SIGNAGE

- 2 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
PRECAUTION ........................................................................................... 3
SERVICING PRECAUTIONS .................................................................... 4
SPECIFICATION ....................................................................................... 6
ADJUSTMENT INSTRUCTION .............................................................. 10
TROUBLE SHOOTING ........................................................................... 16
BLOCK DIAGRAM .................................................................................. 27
EXPLODED VIEW .................................................................................. 28
SCHEMATIC CIRCUIT DIAGRAM ..............................................................

- 3 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
WARNING FOR THE SAFETY-RELATED COMPONENT.
• There are some special components used in LCD
zmonitor 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 or inverter
circuit, must disconnect the AC adapter 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.
REPLACE ONLY WITH THE SAME OR EQUIVALENT
TYPE.
PRECAUTION
1.5 Kohm/10W
0.15µF
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
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.
ADVARSEL
Lithiumbatteri - Eksplosionsfare ved fejlagtig
håndtering.
Udskiftning må kun ske med batteri af samme
fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.

- 4 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
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 reconnecting 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) isopropyl 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 500 ˚F to 600 ˚F.
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.
(500 ˚F to 600 ˚F)
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
(500 ˚F to 600 ˚F)
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.
SERVICING PRECAUTIONS

- 5 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
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 Transistor
Removal/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.

- 6 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
SPECIFICATION
1. Application range
This specication is applied to the LW36D chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F),
CST: 40 °C ± 5 °C
2) Relative Humidity: 65 % ± 10 %
3) Power Voltage
: Standard input voltage (AC 100-240 V~, 50/60 Hz)
* Standard Voltage of each products is marked by models.
4) Specication and performance of each parts are followed
each drawing and specication by part number in accord-
ance with BOM.
5) The receiver must be operated for about 5 minutes prior to
the adjustment.
3. Test method
1) Performance: LGE Monitor test method followed.
2) Demanded other specication
- Safety : CE, IEC specication
- EMC : CE, IEC
4. General Specication
No. Item Content Remark
1 RGB Input(1EA) RGB-PC Analog (D-SUB 15Pin)
2 DVI Input(1EA) DVI-D Not support D-TV resolution
3 HDMI Input (1EA) HDMI Rear / support D-TV&PC resolution
4 DP Input(1EA) DP Rear / support D-TV&PC resolution
5 Component Input (1EA) Y/Cb/Cr , Y/Pb/Pr Shared with D-SUB 15Pin
6 Audio Input (1EA) RGB, Component Audio L/R Input
7 Speaker Output (2EA) Compatible with common speaker 10W Output
8 IR Input (1EA) IR Dongle
9 External/Touch USB (2EA) Picture, Music, Movie, SVC / Touch Control(with
PC)
Software Update + Picture + Music +
Movie & Connect PC
10 RS-232C Input/Output (1EA) Display Control
11 LAN(1EA) RJ45, 100BASE-T Network Connection for SuperSign Elite
12 Local Key INPUT, MENU, ▲,▼, ◄, ►, AUTO/SET, POWER 8 keys
13 Touch IR Spread Touch 10point
No. Item Specication Remarks
1 Supported Sync. Type Separate Sync.(RGB), SOG
2 Operating Frequency
Analog Horizontal 30 ~ 83 kHz
Vertical 50 ~ 75 Hz
Digital Horizontal 30 ~ 83 kHz
Vertical 50 ~ 60.317 Hz
3 Resolution
Analog Max 1920×1080 @ 60 Hz
Recommend 1920×1080 @ 60 Hz
Digital Max 1920×1080 @ 60 Hz
Recommend 1920×1080 @ 60 Hz
4.1. General Specication
4.2. RGB, DVI-D, HDMI, Display Port (PC) Specication

- 7 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
No. Section Pol. Dot Clock
[MHz]
Frequency
[kHz]/[Hz]
Total
Cycle
(E)
Display
(A)
Front
Porch(B)
Sync.
(D)
Back
Porch(F)
Resolution
1 H(Pixels) + 25.175 31.469 800 640 16 96 48 640 x 350
V(Lines) - 70.8 449 350 37 2 60
2 H(Pixels) - 28.321 31.468 900 720 18 108 54 720 X 400
V(Lines) + 70.8 449 400 12 2 35
3 H(Pixels) - 25.175 31.469 800 640 16 96 48 640 x 480
V(Lines) - 59.94 525 480 10 2 33
4 H(Pixels) - 31.5 37.5 840 640 16 64 120 640 x 480
V(Lines) - 75 500 480 1 3 16
5 H(Pixels) + 40.0 37.879 1056 800 40 128 88 800 x 600
V(Lines) + 60.317 628 600 1 4 23
6 H(Pixels) + 49.5 46.875 1056 800 16 80 160 800 x 600
V(Lines) + 75.0 625 600 1 3 21
7 H(Pixels) +/- 57.283 49.725 1152 832 32 64 224 832 x 624
V(Lines) +/- 74.55 667 624 1 3 39
8 H(Pixels) - 65.0 48.363 1344 1024 24 136 160 1024 x 768
V(Lines) - 60.0 806 768 3 6 29
9 H(Pixels) - 78.75 60.123 1312 1024 16 96 176 1024 x 768
V(Lines) - 75.029 800 768 1 3 28
10 H(Pixels) + 74.5 44.772 1664 1280 64 128 192 1280 x 720
V(Lines) + 59.855 748 720 3 5 20
11 H(Pixels) - 85.86 47.7 1800 1366 72 144 216 1366 x 768
V(Lines) - 60 795 768 1 3 23
12 H(Pixels) + 108.0 63.981 1688 1280 48 112 248 1280 x 1024
V(Lines) + 60.02 1066 1024 1 3 38
13 H(Pixels) + 135.00 79.98 1688 1280 16 144 248 1280 x 1024
V(Lines) + 75.02 1066 1024 1 3 38
14 H(Pixels) - 146.25 65.290 2240 1680 104 176 280 1680 x 1050
V(Lines) + 59.954 1089 1050 3 6 30
15 H(Pixels) + 148.5 67.5 2200 1920 88 44 88 1920 x 1080
V(Lines) + 60 1125 1080 4 5 46
5. Timing
5.1. RGB (PC Mode)

- 8 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5.3. HDMI, Display Port (DTV Mode ), * DVI Input dont support DTV Mode
No. Specication Remark
Resolution H-freq(kHz) V-freq(Hz) Proposed
1 480/60P 31.5 60 EDTV 480p
2 576/50P 31.25 50 EDTV 576p
3 720/50P 37.5 50 HDTV 720p
4 720/60P 45 60 HDTV 720p
5 1080/50i 28.1 50 HDTV 1080i 50Hz For Australian
6 1080/60i 33.75 60 HDTV 1080i 60Hz
7 1080/50P 56.25 50 HDTV 1080P 50Hz
8 1080/60P 67.5 60 HDTV 1080P 60Hz
5.2. HDMI, DVI-D, Display Port (PC Mode )
No. Section Pol. Dot Clock
[MHz]
Frequency
[kHz]/[Hz]
Total
Cycle
(E)
Display
(A)
Front
Porch(B)
Sync.
(D)
Back
Porch(F)
Resolution
1 H(Pixels) - 25.175 31.469 800 640 16 96 48 640 x 480
V(Lines) - 59.94 525 480 10 2 33
2 H(Pixels) + 40.0 37.879 1056 800 40 128 88 800 x 600
V(Lines) + 60.317 628 600 1 4 23
3 H(Pixels) - 65.0 48.363 1344 1024 24 136 160 1024 x 768
V(Lines) - 60.0 806 768 3 6 29
4 H(Pixels) + 74.5 44.772 1664 1280 64 128 192 1280 x 720
V(Lines) + 59.855 748 720 3 5 20
5 H(Pixels) - 85.86 47.7 1800 1366 72 144 216 1366 x 768
V(Lines) - 60 795 768 1 3 23
6 H(Pixels) + 108.0 63.981 1688 1280 48 112 248 1280 x 1024
V(Lines) + 60.02 1066 1024 1 3 38
7 H(Pixels) - 146.25 65.290 2240 1680 104 176 280 1680 x 1050
V(Lines) + 59.954 1089 1050 3 6 30
8 H(Pixels) + 148.50 67.5 2200 1920 88 44 88 1920 x 1080
V(Lines) + 60 1125 1080 4 5 46

- 9 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5.4. Component Input (Y/Pb/Pr)
No. Specication Remark
Resolution H-freq(kHz) V-freq(Hz) Proposed
1 720*480 15.63 59.94 SDTV, DVD 480i
2 720*483 31.47 59.94 EDTV 480p
3 720*576 15.625 50.00 SDTV, DVD 576i
4 720*576 31.25 50.00 EDTV 576p
5 1280*720 45.00 60.00 HDTV 720p
6 1280*720 37.5 50 HDTV 720p
7 1280*720 44.96 59.94 HDTV 720p
8 1920*1080 31.25 50.00 HDTV 1080i 50Hz For Australian
9 1920*1080 33.75 60.00 HDTV 1080i 60Hz ATSC
10 1920*1080 33.72 59.94 HDTV 1080i 59.94Hz
11 1920*1080 56.25 50 HDTV 1080P 50Hz
12 1920*1080 67.5 60 HDTV 1080P 60Hz

- 10 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application Range
This spec sheet is applied all of the Digital Signage Product
with LW36D chassis.
2. Designation
1) The adjustment is according to the order which is designat-
ed and which must be followed, according to the plan which
can be changed only on agreeing.
2) Power adjustment : Free Voltage.
3) Magnetic Field Condition: Nil.
4) Input signal Unit: Product Specication Standard.
5) Reserve after operation: Above 5 Minutes (Heat Run)
Temperature : at 25 °C ± 5 °C
Relative humidity : 65 % ± 10 %
Input voltage : 220V, 60Hz
6) Adjustment equipments : Color Analyzer (CA-210 or CA-
110), DDC Adjustment Jig equipment, SVC remote control-
ler.
7) Push The "IN STOP KEY" – For memory initialization.
3. Main PCB check process
3.1. ADC Process
3.1.1. ADC
· Enter Service Mode by pushing “ADJ” key,
· Enter Internal ADC mode by pushing “►” key at “ADC Cali-
bration”
→ Caution: Using ‘power on’ button of the Adjustment R/C ,
power on Multi-vision.
* ADC Calibration Protocol (RS232)
Adjust Sequence
▪aa 00 00 [Enter Adjust Mode]
▪xb 00 40 [Component1 Input (480i)]
▪ad 00 10 [Adjust 480i Comp1]
▪xb 00 60 [RGB Input (1024*768)]
▪ad 00 10 [Adjust 1024*768 RGB]
▪aa 00 90 End Adjust mode
* Required equipment : Adjustment R/C.
3.2. DDC EDID Download
- Auto Download
· After enter Service Mode by pushing “ADJ” key,
· Enter EDID D/L mode.
· Enter “START” by pushing “OK” key.
→ Caution: Never connect HDMI & D-sub Cable when EDID
downloaded.
* EDID data and Model option download (RS232)
Case1 : Software version up
1) After downloading S/W by USB , Multi-vision set will
reboot automatically
2) Push "In-stop" key
3) Push "Power on" key
4) Function inspection
5) After function inspection, Push "In-stop" key.
Case2 : Function check at the assembly line
1) When TV set is entering on the assembly line, Push "In-
stop" ke y at rst.
2) Push "Power on" key for turning it on.
→ If you push "Power on" key, TV set will recover channel
information by itself.
3) After function inspection, Push "In-stop" key.
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NO Item CMD
1
CMD
2
Data 0
Enter
Adjust MODE
Adjust
‘Mode In’
A A 0 0 When transfer the
‘Mode In’,
Carry the command.
ADC adjust ADC
Adjust
A D 1 0 Automatically download
(The use of a internal
Data)
lGhkq|z{G
WUG{GvXG G G
XUG{GvYG G G
YUG{GvZG G G
ZUG{Gv[G G G
[UG{Gv\G G G
\UGjGnG G G
]UGhGvG G G
^UGhkjGjGG G
_UG~GiG G G
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XWUG{GwG G G
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lkpkGkVs G
oktpX G vrG
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yni G vrG
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ඖXXUlkpkGkVs
NO Item CMD
1
CMD
2
Data 0
Enter
download
MODE
Download
‘Mode In’
A A 0 0 When transfer the
‘Mode In’,
Carry the command.
EDID data and
Model option
download
Download A E 00 10 Automatically download
(The use of a internal
Data)

- 11 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3.2.1. DDC EDID Write (RGB 128Byte )
· Connect D-sub Signal Cable to D-Sub Jack.
· Write EDID DATA to EEPROM (24C02) by using DDC2B
protocol.
· Check whether written EDID data is correct or not.
* For SVC main Ass’y, EDID have to be downloaded to Insert
Process in advance.
- RGB
-DVI
- HDMI
- DP
1) All Data : HEXA Value
2) Changeable Data :
*: Serial No : Controlled / Data:01
**: Month : Controlled / Data:00
***:Year : Controlled
****:Check sum
3.3. Function Check
3.3.1. Check display and sound
· Check Input and Signal items. (cf. work instructions)
1) RGB (PC : 1920 x 1080 @ 60hz)
2) COMPONENT(480i)/AV with D-sub to RCA cable
3) DVI
4) PC Audio In with Phone and RCA to Phone cable
5) HDMI
6) DP
7) USB
8) LAN
9) Speaker Out
* Display and Sound check is executed by Remote controller.
3.3.2. Hot Key Table
Hot Key Input Mode
HDMI1 HDMI
HDMI2 DP
HDMI3 DVI
RGB RGB
AV1 AV
COMP1 Component
→ Caution : Not to push the INSTOP KEY after completion if
the function inspection.
0x48 0x000x200x200x0A0x450x470x410x4E0x470x490x530x200x470x4C0x00
0xFC 0x000x000x000x200x200x200x200x200x200x0A0x000x0F0x530x1E0x4B
0x32 0x000xFD0x000x000x000x180x000x000x420xAE0xBF0x000x330x8F0x46
0x30 0x1E0x000x510xAA0x560x210x660x1E0x000x000x420xAE0xBF0x000x45
0x2C 0x580x400x2D0x380x710x180x800x3A0x02
0xC00x810x400x310x400x45
0x40 0x610x400x710x800x810x400x810x000xB30x000x080xA10x4A0x470x0F
0x26 0x9A0x4E0x540xA60x5B0x7C0xEA0x780x450x7A0x6C0x030x010x170x1E
0x01 0x010x010x010x9E0x750x6D0x1E0x000xFF0xFF0xFF0xFF0xFF0xFF0x00
0x48 0x000x200x200x0A0x450x470x410x4E0x470x490x530x200x470x4C0x00
0xFC 0x000x000x000x200x200x200x200x200x200x0A0x000x0F0x530x1E0x4B
0x32 0x000xFD0x000x000x000x180x000x000x420xAE0xBF0x000x330x8F0x46
0x30 0x1E0x000x510xAA0x560x210x660x1E0x000x000x420xAE0xBF0x000x45
0x2C 0x580x400x2D0x380x710x180x800x3A0x02
0xC0
0x810x400x310x400x45
0x40 0x610x400x710x800x810x400x810x000xB30x000x080xA10x4A0x470x0F
0x26 0x9A0x4E0x540xA60x5B0x7C0xEA0x780x450x7A0x6C0x030x010x170x1E
0x01 0x010x010x010x9E0x750x6D0x1E0x000xFF0xFF0xFF0xFF0xFF0xFF0x00
0x3C0x000x200x200x0A0x450x470x410x4E0x470x490x530x200x470x4C0x00
0xFC0x000x000x000x200x200x200x200x200x200x0A0x000x0F0x530x1E0x3C
0x380x000xFD0x000x000x000x180x000x000x420xAE0xBF0x000x330x8F0x46
0x300x1E0x000x510xAA0x560x210x660x1E0x000x000x420xAE0xBF0x000x45
0x2C0x580x400x2D0x380x710x180x800x3A0x02
0xC0
0x810x400x310x400x45
0x400x610x400x710x800x810x400x810x000xB30x000x080xA10x4A0x470x0F
0x260x9A0x4E0x540xA60x5B0x7C0xEA0x780x450x7A0x800x030x010x170x1E
0x010x010x010x010x9E0x760x6D0x1E0x000xFF0xFF0xFF0xFF0xFF0xFF0x00
0x3C0x000x200x200x0A0x450x470x410x4E0x470x490x530x200x470x4C0x00
0xFC0x000x000x000x200x200x200x200x200x200x0A0x000x0F0x530x1E0x3C
0x380x000xFD0x000x000x000x180x000x000x420xAE0xBF0x000x330x8F0x46
0x300x1E0x000x510xAA0x560x210x660x1E0x000x000x420xAE0xBF0x000x45
0x2C0x580x400x2D0x380x710x180x800x3A0x02
0xC0
0x810x400x310x400x45
0x400x610x400x710x800x810x400x810x000xB30x000x080xA10x4A0x470x0F
0x260x9A0x4E0x540xA60x5B0x7C0xEA0x780x450x7A0x800x030x010x170x1E
0x010x010x010x010x9E0x760x6D0x1E0x000xFF0xFF0xFF0xFF0xFF0xFF0x00
0x3E0x010x200x200x0A0x450x470x410x4E0x470x490x530x200x470x4C0x00
0xFC0x000x000x000x200x200x200x200x200x200x0A0x000x0F0x530x1E0x3C
0x380x000xFD0x000x000x000x180x000x000x420xAE0xBF0x000x330x8F0x46
0x300x1E0x000x510xAA0x560x210x660x1A0x000x000x420xAE0xBF0x000x45
0x2C0x580x400x2D0x380x710x180x800x3A0x02
0xC0
0x810x400x310x400x45
0x400x610x400x710x800x810x400x810x000xB30x000x080xA10x4A0x470x0F
0x260x9A0x4E0x540xA60x5B0x7C0xEA0x780x450x7A0x800x030x010x170x1E
0x010x010x010x010x9E0x770x6D0x1E0x000xFF0xFF0xFF0xFF0xFF0xFF0x00
0x3E0x010x200x200x0A0x450x470x410x4E0x470x490x530x200x470x4C0x00
0xFC0x000x000x000x200x200x200x200x200x200x0A0x000x0F0x530x1E0x3C
0x380x000xFD0x000x000x000x180x000x000x420xAE0xBF0x000x330x8F0x46
0x300x1E0x000x510xAA0x560x210x660x1A0x000x000x420xAE0xBF0x000x45
0x2C0x580x400x2D0x380x710x180x800x3A0x02
0xC0
0x810x400x310x400x45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0xC0
0x810x400x310x400x45
0x400x610x400x710x800x810x400x810x000xB30x000x080xA10x4A0x470x0F
0x260x9A0x4E0x540xA60x5B0x7C0xEA0x780x450x7A0x800x040x010x170x1E
0x010x010x010x010x9E0x780x6D0x1E0x000xFF0xFF0xFF0xFF0xFF0xFF0x00
0x3C0x010x200x200x0A0x450x470x410x4E0x470x490x530x200x470x4C0x00
0xFC0x000x000x000x200x200x200x200x200x200x0A0x000x0F0x530x1E0x3C
0x380x000xFD0x000x000x000x180x000x000x420xAE0xBF0x000x330x8F0x46
0x300x1E0x000x510xAA0x560x210x660x1A0x000x000x420xAE0xBF0x000x45
0x2C0x580x400x2D0x380x710x180x800x3A0x02
0xC0
0x810x400x310x400x45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- 12 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4. Total Assembly Line Process
4.1. Adjustment Preparation
· W/B Equipment condition
CA210 : CH 14, Test signal : Inner pattern (204
gray,85IRE)
· Above 5 minutes H/run in the inner pattern. (“power on” key
of adjust remote control)
Color
Temperature
Cool 13,000k °K X=0.270 (±0.002)
Y=0.271 (±0.002)
<Test Signal>
Inner pattern
(216gray,85IRE)
Medium 9,300k °K X=0.285 (±0.002)
Y=0.293 (±0.002)
Warm 6,500k °K X=0.313 (±0.002)
Y=0.329 (±0.002)
CA210 : CH 14, Test signal : Inner pattern (80IRE)
- W/B Table
Color
Temperature
Time
Cool Medium Warm
XYXYXY
0-2 Minute 279 280 293 303 314 330
3-5 Minute 278 278 292 301 313 328
6-9 Minute 276 276 290 299 311 326
10-19 Minute 275 274 289 297 310 324
20-35 Minute 274 273 288 296 309 323
36-49 Minute 273 272 287 295 308 322
50-79 Minute 272 271 286 294 307 321
More than 80 Minute 271 270 285 293 306 320
* Connecting picture of the measuring instrument
(On Automatic control)
- Inside PATTERN is used when W/B is controlled. Connect
to auto controller or push Adjustment R/C POWER-ON →
Enter the mode of White-Balance, the pattern will come out.
* Auto-control interface and directions
1) Adjust in the place where the inux of light like oodlight
around is blocked. (Illumination is less than 100Lux).
2) Adhere closely the Color Analyzer ( CA210 ) to the module
less than 10cm distance, keep it with the surface of the
Module and Color Analyzer’s Prove vertically.(80° ~ 100°).
3) Aging time
- After aging start, keep the power on (no suspension of power
supply) and heat-run over 5 minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others, check
the back light on.
* Auto adjustment Map(RS-232C)
RS-232C COMMAND
[ CMD ID DATA ]
Wb 00 00 White Balance Start
Wb 00 ff White Balance End
RS-232C COMMAND
[CMD ID DATA] MIN
CENTER
(DEFAULT) MAX
Cool Mid Warm Cool Mid Warm
R Gain jg Ja jd 00 172 192 192 192
G Gain jh Jb je 00 172 192 192 192
B Gain ji Jc jf 00 192 192 172 192
R Cut 64 64 64 128
G Cut 64 64 64 128
B Cut 64 64 64 128
** Caution **
Color Temperature : COOL, Medium, Warm.
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
adjust other two lower than C0. (when R/G/B Gain are all C0,
it is the FULL Dynamic Range of Module)
* Manual W/B process using adjusts Remote con-
trol.
· After enter Service Mode by pushing “ADJ” key,
· Enter White Balance by pushing “►” key at “White Balance”.
* After You nish all adjustments, Press “In-start” button and
compare Tool option and Area option value with its BOM, if it
is correctly same then unplug the AC cable. If it is not same,
then correct it same with BOM and unplug AC cable. For cor-
rect it to the model’s module from factory JIG model.
* Push The “IN STOP KEY” after completing the function
inspection. And Mechanical Power Switch must be set “ON”.

- 13 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.2. DPM operation conrmation
Check if Power LED Color and Power Consumption operate
as standard for RGB/HDMI/DP/DVI Input
· Set Input to RGB/HDMI/DP/DVI and connect D-sub/
HDMI/DP/DVI cable to set
· Measurement Condition: (100~240V@ 50/60Hz)
· Conrm DPM operation at the state of screen without
Signal
* Because 42/47/55WT30 have no LED Indicator, check DPM
through conrming “Power Saving Mode” OSD after discon-
necting the cable
4.3. Model name & Serial number Down-
load
4.3.1. Model name & Serial number D/L
· Press “Power on” key of service remocon.(Baud rate :
115200 bps)
· Connect RS232 Signal Cable to RS-232 Jack.
· Write Serial number by use RS-232.
4.3.2. Signal TABLE
CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 + … + Data_n
Delay : 20 ms
4.3.3. Command Set
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart,
0, Phase
Data write : Model Name and Serial Number write in EEP-
ROM,.
4.3.4. Method & notice
1) Serial number D/L is using of scan equipment.
2) Setting of scan equipment operated by Manufacturing
Technology Group.
3) Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0
* Manual Download (Model Name and Serial
Number)
If the TV set is downloaded By OTA or Service man,
Sometimes model name or serial number is initialized.( Not
always) There is impossible to download by bar code scan,
so It need Manual download.
1) Press the ‘instart’ key of ADJ remote controller.
2) Go to the menu ‘Model Number D/L’ like below photo.
3) Input the Factory model name(ex 42LD450-ZA) or Serial
number like photo.
4) Check the model name Instart menu → Factory name
displayed (ex 42LD450-ZA)
4.5. LAN Port check → Ping Test
* If it is NG , conrm PC IP setting.
→ IP : 12.12.2.3
→ Sub Net : 255.255.255.0
→ Gate way : 12.12.2.1
Power Only Mode Monitor Side IP Default Conguration
→ IP : 12.12.2.2
→ Sub Net : 255.255.255.0
→ Gate way : 12.12.2.1
4.6. USB/PIP check
1) press the PIP hot key of Remocon.
2) Screen Inspection (When PIP key is pressed, picture will be
changed (1 -> 2)
* When PIP hot key use, Should change the USB les name
as “pip_test.jpg”.
CMD LENGTH ADH ADL DATA_1 . . . Data_n CS DELAY
No. Adjust mode CMD(hex) LENGTH(hex) Description
1 EEPROM
WRITE
A0h 84h+n n-bytes Write (n = 1~16)

- 14 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.7. Outgoing condition Conguration
· When pressing IN-STOP key by SVC remocon, Red LED are
Press IN-STOP key by SVC remocon. And then automati-
cally turn off.
4.8. Hi-Pot test
Conrm whether is normal or not when between power
board's ac block and GND is impacted on 1.5kV(dc) or
2.2kV(dc) for one second.
4.9. Touch Controller Check
A. Execute the MTC.exe (If “MTC.exe” can’t execute, Install
the “.Net Framework 3.5”)
B. Plug a USB cable into a USB port on the Multi-Touch Con-
troller. Then, connect the USB cable to your PC (You must
turn on the Power to the Monitor)
C. Press the Start Button
D. Conrm the test result.(OK / NG)
* Touch Device ID
* Name of the LGE Multi-Touch Information (MTC)
1) the Information of the Touch Controller
2) Start Button (Hotkey : 1 or Enter)
3) Result (OK / NG )
4) Process state
5) Exit
- OK
- NG
4.10. Touch test
1) Execute the MTVP(Multi Touch Verify Program).exe
* When a pop-up window appears, select the touch model
inch.
2) Plug a USB cable into a USB port on the back of the
monitor. Then, connect the USB cable to your PC so that it
automatically recognizes the touch screen monitor.
3) The MTVP automatically operates.
(If The MTVP automatically doesn’t operate, Push “Start” but-
ton )
* When the “Draw a long line in touch screen” is displayed.
4) Conrm the test result.
* Result
→ PASS
→ NG
Inch Vendor
ID(VID)
Product
ID(PID)
42” 0x43E 0x9AA1
47” 0x43E 0x9AA2
55” 0x43E 0x9AA3

- 15 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
* Boot le Download
1) Execute ISP program "Mstar ISP Utility" and then click
"Cong" tab.
2) Set as below, and then click "Auto Detect" and check
"OK" message. If "Error" is displayed, Check connection
between computer, jig, and set.
3) Click "Read" tab, and then load download le (XXXX.bin)
by clicking "Read"
4) Click "Connect" tab. If "Can’t " is displayed, Check connec-
tion between computer, jig, and set.
5) Click "Auto" tab and set as below.
6) Click "Run".
7) After downloading, check "OK" message.
* USB DOWNLOAD(*.epk le download)
1) Put the USB Stick to the USB socket
2) Automatically detecting update le in USB Stick
- If your downloaded program version in USB Stick is Low,
it didn’t work.
- But your downloaded version is High, USB data is auto-
matically detecting
3) Show the message "Copying les from memory"
4) Updating is staring.
5) Updating Completed, The Multi-vision will restart automati-
cally.
6) If your Multi-vision is turned on, check your updated version
and Tool option. (explain the Tool option, next stage)
* Touch Micom(lpc1752/11u14) F/W Option
Settings (ELNEC PG4UW Gang Write)
1) Select the “Load” button (File → Load…).
2) Check the “Erase buffer before loading”.
3) Select the rom le and Press the “Open” button.
4) Select the “Program” button (Device → Program)
5) Check the “Calculates the checksum of the interrupt vec-
tors” In “Edit special options” group
6) When a pop-up window appears, Check the “Calculates the
checksum of the interrupt vectors”
7) Press the “OK” button
9) Conrm the checked “Calculates the checksum of the inter-
rupt vectors”.
10) Press the “No” button.
(1)
filexxx.bi
n
(2) (3)
Please Check the Speed :
To use speed between
from 200KHz to 400KHz
G G G G G G G G G G UG
G
G
O[PG
O^PG………UvrG
O\PG
O]P
G

- 16 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING
1. No Power
NO POWER
CHECK P501
(ST3.5V)
P501 1Pin
POWER_ON/OFF Control ?
CHECK POWER BOARD
CHECK POWER BOARD
CHECK SUB MICOM IC6 & Cristal X1
CHECK Sub MICOM X1
(10MHz)?
YES(HIGH)
NO
YES
NO(LOW)
YES
NO
1. CHECK IC4
2. CHECK All Vcc of IC4
Change IC6 OR IC5
Sub MICOM EEPROM
IC5 SCL/SDA Operation
right ?
NO
YES(HIGH)
Check Main Scaler IC4 ALL VCC and Cristal X201 24Mhz
Sub MICOM IC6
SCL/SDA(70/71Pin) operation
Right?
NO
YES(HIGH)

- 17 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2. No RASTER(OSD IS NOT DISPLAYED) - MAIN
NO RASTER
(OSD IS NOT DISPLAY)
CHECK LVDS Wafer
P1301/P1302 Connection?
CHECK INVERTER
VOLTAGE(24V)?
Change P1301/P1302 or LVDS cable
1. CHECK 14P WAFER and 14p CONNECTOR. change POWER BOARD
2. Check IC6 Inverter Control
Check SCAILER IC4 ALL Voltage and Cristal X201 24Mhz
LVDS Data and Clock
wave of IC4 Right?
YES
YES
YES
NO
NO
NO
1. CHECK LCD module
2. CHECK T-CON BOARD
FET Q507 Voltage 12V ? CHECK IC6 Panel Control or change FET 507
NO
YES

- 18 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3. NO RASTER STATE ON RGB Input
NO RASTER STATE ON
RGB SIGNAL
CHECK RGB,H/V Sync Wave
on INPUT JACK (JK903)
Check JK903 pin short.
CHECK SIGNAL CABLE AND OUTPUT DEVICE
YES
NO
1. CHECK IC4
2. CHECK Vcc OF IC4 AND PERIPHERALS

- 19 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4. NO RASTER STATE ON AV Input
NO RASTER STATE ON
VIDEO SIGNAL(AV)
CHECK VIDEO input signal WAVE
ON JK903 2Pin
CHECK INPUT/OUT
of Buffer Q905
Check JK903 pin short.
VIDEO SIGNAL Combined with RGB input Jack 15PIN D-SUB(JK903) 2PIN G line.
RGA to D-sub cable is recommended
CHECK Vcc AND PERIPHERALS OF 905
YES
YES
NO
NO
1. CHECK IC4
2. CHECK Vcc OF IC4 AND PERIPHERALS

- 20 - LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5. NO RASTER STATE ON COMPONENT Input
NO RASTER STATE ON
COMPONENT SIGNAL
YES
NO Check JK903 pin short.
Component SIGNAL Combined with RGB input Jack 15PIN D-SUB(JK903), YR, PbG, PrB
RGA to D-sub cable is recommended
CHECK Component
Y/Pb/Pr input signal WAVE
ON JK903 1,2,3Pin
1. CHECK IC4
2. CHECK Vcc OF IC4 AND PERIPHERALS
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