LG 55LH80YD-AB User manual

TV COM1 COM2AV1 AV2 RGB WIRELESS
1 2 3 4
4
LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LB91F
MODEL : 55LH80YD 55LH80YD-AB
North/Latin A erica http://aic.lgservice.co
Europe/Africa http://eic.lgservice.co
Asia/Oceania http://biz.lgservice.co
Internal Use Only
P/NO : MFL60020316(0906-REV00) Printed in Korea

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2 LGE Internal Use Only
CONTENTS
CONTENTS ............................................................................................. 2
PRODUCT SAFETY ................................................................................. 3
SPECIFICATION ....................................................................................... 6
ADJUSTMENT INSTRUCTION............................................................... 11
BLOCK DIAGRAM_TV ........................................................................... 16
BLOCK DIAGRAM_AV BOX .................................................................. 20
EXPLODED VIEW .................................................................................. 30
SC EMETIC DIAGRAM_TV....................................................................31
SC EMETIC DIAGRAM_AV BOX...........................................................40
APPENDIX_REPAIR GUIDE .......................................................................

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3 LGE Internal Use Only
SAFETY PRECAUTIONS
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
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm meter to the AC
plug prongs tied together and touch other ohm meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩ and 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current ot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current ot Check circuit
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt meter
IMPORTANT SAFETY NOTICE
0.15uF

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4
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 s ecified 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

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5 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.
Re lacement
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.

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
6
4. General Specification(TV)
1. Application Range
This specification sheet is applied to the LCD TV used LB92F
chassis.
2. Specification
Each part is tested as below without special appointment
1) Temperature : 25 ± 5°C (77 ± 9ºF), CST : 40 ± 5ºC
2) Relative Humidity : 65 ±10%
3) Power Voltage : Standard input voltage
(100 240V@ 50/60Hz)
* Standard Voltage of each products is marked by models
4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
5) The receiver must be operated for about 20 minutes prior to
the adjustment.
3. Test method
1) Performance : LGE TV test method followed.
2) Demanded other specification
Safety : CE, IEC specification
EMC : CE, IEC specification
Wireless : Wireless HD specification(Option)
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement
.
No Item Specification Remark
1. Broadcasting System 1) PAL-BB(Analog-A stralia)
2) DVB-T(Digital)
Media BOX Rear 1ea
Analog: VHF/UHF 0-75/CATV 2-44
Digital: VHF -6-12, UHF 27-69
2. Receiving System 1) Analog :Upper Heterodyne
2) Digital:COFDM, QAM
3. Inp t Voltage 1) AC 100 ~ 240V 50/60Hz
4. Market A stralia
42 inch Wide(1920 ◊ 1080) FHD + 120Hz 42LH80YD-AB
47 inch Wide(1920 ◊ 1080) FHD + 120Hz 47LH80YD-AB
5. Screen Size
55 inch Wide(1920 ◊ 1080) FHD + 120Hz 55LH80YD-AB
6. Aspect Ratio 16:9
7. T ning System FS
LC420WUF-SBB1 (witho t inverter) LGD 42LH80YD-AB
LC470WUF-SBB1 (witho t inverter) LGD 47LH80YD-AB
8. Mod le
LC550WUD-SBA1 LGD 55LH80YD-AB
9. Operating Environment 1) Temp : 0 ~ 40 deg
2) H midity : ~ 80 %
10. Storage Environment 1) Temp : -20 ~ 60 deg
2) H midity : ~ 85 %

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
7
5. Chroma & Brightness
No Item Min Typ Max Unit Remark
1. Max Luminance 400 500 cd/ m242LH80YD AB
(Center 1 point / Full White Pattern) 400 500 cd/ m247LH80YD AB
400 500 cd/ m255LH80YD AB
2. Luminance uniformity 77 % Full white
RED X Typ. 0.636 Typ.
Y 0.03 0.334 +0.03 47LH80YD AB
GREEN X 0.290
Y 0.608
3. Color BLUE X 0.145
coordinate Y 0.064
X 0.279
WHITE Y 0.292
X Typ. 0.637 Typ.
RED Y 0.03 0.333 +0.03 55LH80YD AB
X 0.287
GREEN Y 0.605
X 0.145
BLUE Y 0.064
X 0.279
WHITE Y 0.292
X Typ. 0.638 Typ.
RED Y 0.03 0.334 +0.03 42LH80YD AB
X 0.290
GREEN Y 0.606
X 0.144
BLUE Y 0.064
X 0.279
WHITE Y 0.292
4. Color coordinate uniformity N/A
1000:1 1400:1 42LH80YD AB
8000:1 10000:1 DCR
5. Contrast ratio 1000:1 1400:1 47LH80YD AB
8000:1 10000:1 DCR
1000:1 1400:1 55LH80YD AB
8000:1 10000:1 DCR
Cool 0.274 0.276 0.278 11000K
0.281 0.283 0.285
6. Color Medium 0.283 0.285 0.287 9300K ** The W/B Tolerance is
Temperature 0.291 0.293 0.295 ± 0.015 for Adjustment)
Warm 0.311 0.313 0.315 6500K
0.327 0.329 0.331

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
8
7. Component Video Input (Y, CB/PB, CR/PR)
No. Specification Remark
Resolution H freq(kHz) V freq(Hz)
1. 720*480i 15.73 60.00 SDTV,DVD 480i
2. 720*480i 15.63 59.94 SDTV,DVD 480i
3. 720*480p 31.47 59.94 480p
4. 720*480p 31.50 60.00 480p
5. 720*576i 15.625 50.00 SDTV,DVD 625 Line
6. 720*576p 31.25 50.00 HDTV 576p
7. 1280*720p 45.00 50.00 HDTV 720p
8. 1280*720p 44.96 59.94 HDTV 720p
9. 1280*720p 45.00 60.00 HDTV 720p
10. 1920*1080i 31.25 50.00 HDTV 1080i
11. 1920*1080i 33.75 60.00 HDTV 1080i
12. 1920*1080i 33.72 59.94 HDTV 1080i
13. 1920*1080p 56.250 50 HDTV 1080p
14. 1920*1080p 67.43/67.5 59.94/60 HDTV 1080p
No Item Min. Typ. Max. Remark
1 Viewing Angle R/L/U/D 89 CR >10
2 Luminance Luminance 400 500
Variation 1.3 PSM: Vivid, CSM: Cool, White: 100IRE
3 Contrast Ratio CR 1000 1400 All White, All Black
4 Color coordinate WHITE X 0.279
Y 0.292
RED X Typ. 0.637 Typ. PSM: Vivid, CSM: Cool, White: 85 IRE
Y 0.03 0.333 +0.03
GREEN X 0.287
Y 0.605
BLUE X 0.145
Y 0.064
6. Module Optical Spec
6.1 55” LCD Module (LGD) – LC550WUD SBA1/ 2, 100Hz, PSU TYPE( WITH INVERTER)
for more details, refer to the module spec.

9 LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
No. Resolution H freq(kHz) V freq(Hz) Pixel clock(MHz) Remark
1 720*480p 31.469 /31.5 59.94 /60 27.00/27.03 SDTV 480P
2 720*576p 31.25 50 54 SDTV 576P
3 1280*720p 37.500 50 74.25 HDTV 720P
4 1280*720p 44.96 /45 59.94 /60 74.17/74.25 HDTV 720P
5 1920*1080i 33.72 /33.75 59.94 /60 74.17/74.25 HDTV 1080I
6 1920*1080i 28.125 50.00 74.25 HDTV 1080I
7 1920*1080p 26.97 /27 23.97 /24 74.17/74.25 HDTV 1080P
8 1920* 1080p 33.716 / 33.75 29.976 /30.00 74.25 HDTV 1080P
9 1920* 1080p 56.250 50 148.5 HDTV 1080P
10 1920* 1080p 67.43 / 67.5 59.94 / 60 148.35/ 148.50 HDTV 1080P
9.2 PC Mode
No. Resolution H freq(kHz) V freq(Hz) Pixel clock(MHz) Remark
1. 720* 400 31.468 70.08 28.321 HDCP
2. 640* 480 31.469 59.94 25.17 VESA HDCP
3 800* 600 37.879 60.31 40.00 VESA HDCP
4. 1024* 768 48.363 60.00 65.00 VESA( XGA) HDCP
5. 1280* 768 47.78 59.87 79.5 WXGA HDCP
6. 1360* 768 47.72 59.8 84.75 WXGA HDCP
7. 1280* 1024 63.595 60.0 108.875 SXGA HDCP
8. 1920* 1080 67.5 60 148.5 WUXGA HDCP
8. RGB input (PC)
No. Resolution H freq(kHz) V freq(Hz) Pixel clock(MHz) Remark
1. 720*400 31.468 70.08 28.321 For only DOS mode
2. 640*480 31.469 59.94 25.17 VESAInput 848*480 60Hz,852*480 60Hz
> 640*480 60Hz Display
3. 800*600 37.879 60.31 40.00 VESA
4. 1024*768 48.363 60.00 65.00 VESA(XGA)
5. 1280*768 47.78 59.87 79.5 WXGA
6. 1360*768 47.72 59.8 84.75 WXGA
7. 1280*1024 63.595 60.0 108.875 SXGA FHD model
8. 1920*1080 66.587 59.93 138.625 WUXGA FHD model
9. DMI input (PC/DTV)
HDMI5 (TV SET)supports only HDMI DTV
9.1 DTV Mode

10 LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
10. Mechanical specification
NO ITEM CONTENT UNIT REMARK
Width Depth Height
1 Product 1373 454.2 964.3 mm
Dimension W/O Packing 1373 106.9 888.5 mm With Stand
1485 570 1085 mm W/O Stand
With Packing 1485 355 1012 mm With Stand
2 Product With Packing 40.9 Kg W/O Stand
Weight 35.5 Kg With Stand
With Packing 46.6 Kg W/O Stand
41.1 Kg With Stand
3 Container 40ft 64 Set W/O Stand
Loading Individual (Normal) 96 Set With Stand
Quantity 40ft1 64 Set W/O Stand
(H Cubic) 96 Set With Stand
Swivel YES/NO
Funchion Angle ±20° Degree
Tilt YES/NO
Angle Front()/Back() Degree
4 Stand Assy Dimension Width Depth Height
(W/O Packing) 572 454.2 276.2 mm With Neck
mm W/O Neck
Dimension(With Packing) mm Commercial
Weight(W/O Packing) 5.4 Kg With Neck
Weight(With Packing) Kg

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. Application Object
This specification sheet applied to LB92F Chassis applied
LCD TV all models manufactured in TV factory.
2. Notes
1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
2) Adjustment must be done in the correct order. But it is
flexible when its factory local problem occurs. .
3) The adjustment must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
4) The input voltage of the receiver must keep 220V, 60Hz.
5) Before adjustment, execute Heat Run for 5 minutes.
6) Displayed 100% White Pattern in state of Heat Run
• How to make set white pattern
1) Press Power ON button of Service Remocon
2) Press ADJ button of Service remocon. Select “7. Test
pattern” and, after select “White” using navigation button,
and then you can see 100% Full White pattern.
* In this status you can maintain Heat Run useless any
pattern generator
* Notice: if you maintain one picture over 20 minutes
(Especially sharp distinction black with white pattern or
Cross hatch pattern) then it can appear image stick near
black level.
3. Adjustment items
* Confirm Tool option before adjustment
* You must confirm and modify that Media box option in state of
Wireless or wired and TV option in state of HDMI5.
3.1. Board adjustment
ADC Calibration(Media Box Only)
EDID/DDC download
Above adjustment items can be also performed in Final
Assembly if needed. Both Board level and Final assembly
adjustment items can be check using In Star Menu 1.ADJUST
CHECK.
* Don't use Instop key after Media Box Main b/d board test
and Media Box assemble & test.
3.2. Final assembly adjustment
Wireless Pairing
White Balance adjustment
RS 232C functionality check
Factory Option setting per destination
EYE Q Test
Ship out mode setting (In Stop)
4. Board adjustment
4.1. ADC(LGE3369) Adjustment
4.1.1 Overview
ADC adjustment is needed to find the optimum black level and
gain in Analog to Digital device and to compensate RGB
deviation.
4.1.2 Equipment & Condition
1) Jig (RS 232C protocol)
2) External/Internal Pattern
ADC Comp 480i / ADC Comp 1080p
=> Select component 480i signal that is same as the
image below on the Media Box with using Pattern
Generator(MSPG 925FA or etc)
3) Adjustment ADC RGB
=> Using Internal Pattern
4) Image
4.1.3 Adjustment
4.1.3.1 Adjustment method
Using RS 232, adjust items listed in 3.1 in the other shown in
“4.1.3.3”
Ref.) ADC Adj. RS232C Protocol_Ver1.0
4.1.3.2 Adj. order
aa 00 00 [Enter ADC adj. mode]
xb 00 04 [Change input source to Component1]
ad 00 10 [Adjust 480i Comp1]
xb 00 60 [Change input source to RGB DTV]
ad 00 10 [Adjust 1080p Comp1/RGB]
ad 00 90 End adj.
LGE Internal Use Only
11
ADJUSTMENT INSTRUCTION
Protocol Command Set ACK
Enter adj. mode aa 00 00 a 00 OK00x
Source change xb 00 40 b 00 OK40x (Adjust 480i Comp1 )
xb 00 60 b 00 OK60x (Adjust 1024*768 RGB)
Begin adj. ad 00 10
Return adj. result OKx (Case of Success)
NGx (Case of Fail)
Read adj. data (main) (main)
ad 00 20 000000000000000000000000007c007b006dx
(sub) (Sub)
ad 00 21 000000070000000000000000007c00830077x
Confirm adj. ad 00 99 NG 03 00x (Fail)
NG 03 01x (Fail)
NG 03 02x (Fail)
OK 03 03x (Success)
End adj. aa 00 90 a 00 OK90x

4.2. EDID(The Extended Display Identification
Data)/DDC(Display Data Channel) download
4.2.1 Overview
It is a VESA regulation. PC or a MNT will display an
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and Play”.
4.2.2 Equipment
Adjust remocon
(Not use Jig. or other equipment becuase store EDID of
Software Application with EEPROM and HDMI switch by
using 12C Line .
4.2.3 Download method
1) Press ADJ key on the adjustment R/C and select [EZ
ADJUST]. Select [8.EDID D/L] and access to the items with
using the ENTER key.
2) Press the OK key on the [Start] menu, HDMI1 / HDMI2 /
HDMI3 / HDMI4 / RBG inputs are selected on the Media Box
and HDMI5 input on the TV. When the process is completed,
the message 'NG' is changed to 'OK'.
* You can download this with using JIG or the equipment
on the HDMI5 / RGB input.
4.2.4 EDID DATA
4.2.4.1 ANALOG DATA 128Byte (2Bi)
4.2.4.2 DIGITAL DATA(HDMI 1/2/3/4/5) 256Byte
* Detail EDID Options are below
5. Total Assembly Adjustment
• The Wireless model can be added the pairing work with the
Media Box besides the existing test and can be changed the
process and the test method.
• Total Assembly process
TV Tool option check
Connect the TV and Media Box wireld with the HDMI
cable. (TV: HDMI5 port / Media Box: Service port)
Wireless Pairing
Media Box Tool option check
Media Box AC power off
Remove the HDMI cable
Adjust the White Balance
Media Box AC power on (Access to Wireless mode)
Check the Display and press the Bluetooth key (send the
TV W/B data to Media Box)
Connect the RF / HDMI1 to Media Box and check.
Shipping
* The Media Box is the main equipment and the TV is after on
the Wireless/Wired connection and the Media Box can
adjust all of the OSD)
(exception: Select the HDMI5 on the Wireless connection)
12 LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
0 1 2 3 4 5 6 7 8 9 A B C D E F
00 00 FF FF FF FF FF FF 00 1E 6D a 01 01 01 01
10 b 01 03 68 73 41 78 0A CF 74 A3 57 4C B0 23
20 09 48 4C A1 08 00 81 80 61 40 45 40 31 40 01 01
30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 45 00 7E 8A 42 00 00 1E 01 1D 00 72 51 D0 1E 20
50 6E 28 55 00 7E 8A 42 00 00 1E 00 00 00 FD 00 3A
60 3E 1E 53 10 00 0A 20 20 20 20 20 20 c
70 c d
00
0 1 2 3 4 5 6 7 8 9 A B C D E F
00 00 FF FF FF FF FF FF 00 1E 6D a 01 01 01 01
10 b 01 03 80 73 41 78 0A CF 74 A3 57 4C B0 23
20 09 48 4C A1 08 00 81 80 61 40 45 40 31 40 01 01
30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 45 00 7E 8A 42 00 00 1E 01 1D 00 72 51 D0 1E 20
50 6E 28 55 00 7E 8A 42 00 00 1E 00 00 00 FD 00 3A
60 3E 1E 53 10 00 0A 20 20 20 20 20 20 c
70 c d1
80 02 03 26 F1 4E 10 1F 84 13 05 14 03 02 12 20 21
90 22 15 01 26 15 07 50 09 57 07 e
A0 e E3 05 03 01 01 1D 80 18 71 1C 16 20 58 2C
B0 25 00 7E 8A 42 00 00 9E 01 1D 00 80 51 D0 0C 20
C0 40 80 35 00 7E 8A 42 00 00 1E 02 3A 80 18 71 38
D0 2D 40 58 2C 45 00 7E 8A 42 00 00 1E 66 21 50 B0
E0 51 00 1B 30 40 70 36 00 7E 8A 42 00 00 1E 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 d2
01
a) Prod ct ID
MODEL NAME HEX EDID Table DDC Fu ctio
FHD Model 0001 01 00 Analog/Digital
b) Month, Year: S/W Released day :
ex) Monthly : ‘02’ -> ‘02’
Year : ‘2009’ -> ‘13’
c)
Model Name(Hex):
MODEL
NAME MODEL NAME(HEX)
All Models 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)
d)
Checks m: Changeable by total EDID data.
1)
d1 -> “04” all port
2)
d2 -> HDMI1:F9, HDMI2:E9, HDMI3:D9, HDMI4:C9, HDMI5:B9
e) Vendor Specific
INPUT MODEL NAME(HEX)
HDMI1 67030C001000B82D
HDMI2 67030C002000B82D
HDMI3 67030C003000B82D
HDMI4 67030C004000B82D
HDMI5 67030C005000B82D
3)
d -> 1D

5.1. White Balance Adjustment
5.1.1 Overview
• W/B adj. Objective & How it works
Objective: To reduce each Panel’s W/B deviation
How it works
: When R/G/B gain in the OSD is at 192, it means the
panel is at its Full Dynamic Range. In order to prevent
saturation of Full Dynamic range and data, one of R/G/B
is fixed at 192, and the other two is lowered to find the
desired value.
5.1.2 Equipment
1) Color Analyzer: CA 210 (NCG: CH 9 / WCG: CH12)
2) Adj. Computer(During auto adj., RS 232C protocol is
needed)
3) Adjust Remocon
4) Video Signal Generator MSPG 925F 720p/216 Gray
(Model:217, Pattern:78)
> Only when internal pattern is not available
• Color Analyzer Matrix should be calibrated using CS 1000
5.1.3 Equipment connection
5.1.4 Adj. Command (Protocol)
LEN : Number of Data Byte
CMD : Command
VAL : Value of FOS Data
CS : Checksum
A : Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX}
• RS 232C Command(Automatic adjustment)
Ex) wb 00 00 : Start Auto adjustment of white balance.
wb 00 10 : Start Gain Adjustment (Inner pattern)
ja 00 ff : Adjustment data
jb 00 c0 :
…
wb 00 1f : End of Gain adjustment
* (wb 00 20(start), wb 00 2f(end)) > In the case of Off
set adjustment
wb 00 ff : End of white balance adjustment
• Adjustment Map
5.2. Adjustment of White Balance
5.2.1 Automatic Adjustment
1) The adjustment condition should be set by the Power On
key.
2) Perform the zero calibration of the Color Analyzer and
place the probe close to the display center.
3) Connect the communication cable (RS 232C).
4) Select the desired model of the adjustment program and
perform the adjustment.
5) After the adjustment is ended (check the OK sign), check
the adjustment condition for each mode of the set.
(Warm, Medium, Cool)
6) Disconnect the probe and the communication cable to end
the adjustment.
* The adjustment should be started with "wb 00 00" and
ended with "wb 00 ff", and the offset should be adjusted
when necessary.
5.2.2 Manual adj. method
1) Set TV in Adj. mode using POWER ON
2) Press the ADJ of the R/C to enter into ‘EZ ADJUST’.
3) Select ‘10.TEST PATTERN’ with the CH +/ key and press
the Enter key for 30 minutes or longer to perform the heat
run.
4) Perform the zero calibration of the Color Analyzer and fix
the sensor with the 10cm or less distance at the center of
the LCD module surface when adjusting.
5) Press the ADJ of the R/C to select ‘7.White Balance’ of the
Ez Adjust and press the right arrow key(G) to enter into the
adjustment mode. (As soon as you press ‘G’, the screen is
entered into the full white inner pattern.)
6) Fix one of the R/G/B gains to 192 and decrease the
remaining two gains to adjust not to exceed 192.
7) The adjustment is done at three white balances of Cool,
Medium and Warm
13 LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Color Analyzer
Computer
Pattern Generator
RS 232C
RS 232C
RS 232C
Probe
Signal Source
* If TV internal pattern is used, not needed
Connection Diagram of Automatic Adjustment
START 6E 50 03 00 CSLEN CMD VAL STOPA A A A A A A A
RS 232C COMMAND
Meaning
[CMD ID DATA]
wb 00 00 White Balance adjustment start.
wb 00 10 Start of adjust gain (Inner white pattern)
wb 00 1f End of gain adjust
wb 00 20 Start of offset adjust(Inner white pattern)
wb 00 2f End of offset adjust
wb 00 ff
End of White Balance adjust(Inner pattern disappeared)
ITEM Command Data Range Default
(Hex.) (Decimal)
Cmd 1 Cmd 2 Min Max
Cool R Gain j g 00 C0 TBD
G Gain j h 00 C0 TBD
B Gain j i 00 C0 TBD
R Cut TBD
G Cut TBD
B Cut TBD
Medium R Gain j a 00 C0 TBD
G Gain j b 00 C0 TBD
B Gain j c 00 C0 TBD
R Cut TBD
G Cut TBD
B Cut TBD
Warm R Gain j d 00 C0 TBD
G Gain j e 00 C0 TBD
B Gain j f 00 C0 TBD
R Cut TBD
G Cut TBD

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
* Adjustment environment and reference
1) Environment illuminance
Adjust it to 10 LUX or less at the place where the light
source such as lamp should be blocked at maximum.
2) Probe location
: Maintain the Color Analyzer (CA 210) close to the
module surface by 10cm or less and keep the probe of
the Color Analyzer perpendicular to the module
surface (80°~ 100°).
3) Aging time
Keep the power on after the aging start (with no power
off) to perform the heat run for 15 minutes or longer.
Make sure that the back light is turned on by using no
signal and the full white pattern or others.
• Standard color coordinate and temperature using CS 1000
• Standard color coordinate and temperature using CA 210(CH 10)
5.3 Option selection per country
(1) Overview
Option selection is only done for models in Non USA
North America due to rating
Applied model: LA92A Chassis applied None USA
model(CANADA, MEXICO)
(2) Method
1) Press ADJ key on the Adj. R/C, then select Country
Group Menu
2) Depending on destination, select KR or US, then on the
lower Country option, select US, CA, MX. Selection is
done using +, KEY
• TV
Adjust directly if it's not a Wireless/Wired state
Adjust after changing to HDMI5 on the Wireless/Wired state
• Media Box
Adjust on the Wireless/Wired state that is excepted the
HDMI5.
5.4 EYE-Q Function Check
Step 1) Turn on TV
Step 2) Press EYE key of Adj. R/C
Step 3) Cover the Eye Q II sensor on the front of the using
your hand and wait for 6 seconds
Step 4) Confirm that R/G/B value is lower than 10 of the
“Raw Data (R: G: B: )” .
If after 6 seconds, R/G/B value is not lower than 10,
replace Eye Q II sensor
Step 5) Remove your hand from the Eye Q II sensor and wait
for 6 seconds
Step 6) Confirm that “B. Light(xxx)” value increases from 0.
If change is not seen, replace Eye Q II sensor
< step 2> < step 3> < step 4>
< step 5> < step 6>
5.5 Wireless Pairing
(1) Overview
To set 1:1 connection from selecting the same Wireless
channel on the TV and Media Box, and fixing Mac address.
* Set this on the Wired (HDMI cable connection) state.
(2) Method
1) Press ADJ Key on the adjustment R/C and select “9.
Wirelesss Pairing” and access to the Manu with using the
ENTER key.
2) Make to display “OK” on paired stauts of items by using F/
G, after select LRP Channel
3) Media box turn off/on and then confirm connection of
Wireless, after remove HDMI cable
LGE Internal Use Only
14
Mode Color Coordination Temp ∆UV
xy
COOL 0.276 0.283 11000K 0.0000
MEDIUM 0.285 0.293 9300K 0.0000
WARM 0.313 0.329 6500K 0.0000
Mode Color Coordination Temp ∆UV
xy
COOL 0.276±0.002 0.283±0.002 11000K 0.0000
MEDIUM 0.285±0.002 0.293±0.002 9300K 0.0000
WARM 0.313+0.002 0.329±0.002 6500K 0.0000
Green Eye Check
Sensor Data: 1
Backlight: 0
O.K
Green Eye Check
Sensor Data: 215
Backli ght : 100

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
15
6. USB S/W Download (option)
(1) Overview
USB Download is function for qickly service through S/W
upgrade and for S/W upgrade application that is necessary
adjust board.
(2) Methood
1. Put the USB Stick to the USB socket
2. Automatically detecting update file 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
automatically detecting
3. Show the message “Copying files from memory”
4. Updating is staring.
5. Updating Completed, The TV will restart automatically.
6. If your TV is turned on, check your updated version and Tool
option. (explain the Tool option, next stage)
* If downloading version is more high than your TV have, TV
can lost all channel data. In this case, you have to
channel recover. if all channel data is cleared, you didn’t have
a DTV/ATV test on production line.
* After downloading, have to adjust TOOL OPTION again.
1. Push "IN START" key in service remote controller.
2. Select "Tool Option 1" and Push “OK” button.
3. Punch in the number. (Each model has their number.)
4. Completed selecting Tool option.
7. Micom JIG Download
(1) Overview
In case of Weltrend Micom applied to TV main and Media Box
main b/d, excuate upgrade by using the Download jig. becuase
USB download is impossible
(2) Method
1) Connect Computer and Jig, TV or Media Box.
2) Excuate Weltren MCU ISP program, and Load Download file.
3) When press F1 or Auto button, start download.
4) Confirm download is normal through Print .
5) Press “IN START” on adjust R/C, Confirm S/W version.
8. TOOL OPTION
(1) Overview
Adjust without adjustment equipment at option change, becuase
model name and specificaion displayed on menu.
* Chage prohivition at pleasure.
(2) Method
1) Push "IN START" key in service remote controller.
2) Select "Tool Option 1" and Push “Enter” Key.
3) "Tool Option 1" is changeable manu for Inch, Tool, Module
maker, Module revision.
Tool Option1: Inch, Tool, Maker, Module Rev.
Tool Option2: HDMI Count, HDMI Switch IC, Component Count,
S Video, RCA AV Count, Scart Count
Tool Option3: EMF(JPEG,MP3), Divx, Bluetooth, Digital Eye,
Headphone, OPC, EPA, e Manual, Audio Amp,
LED Type
Tool Option4: Clear QAM, Local Dimming, THX, Digital Demod,
Analog Demod, THS Media Director
(3) Tool option setting.
MODEL Display opt1 opt2 opt3 opt4
47” TV 33473 4168 548 4352
Media Box 33473 4424 52132 4352
55” TV 45761 4168 548 4352
Media Box 45761 4424 52132 4352

16 LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
BLOCK DIAGRAM_TV
S-Flash
(32Mb)
NTP3100L
(D-AMP)
X100
X-tal(12Mhz)
Reset
I2S
MCLK
For wireless
IR & Local KEY
24C16
DDR2 (1Gb)
X900
X-tal(24**)
NVRAM
24C512
EEPROM
DDR(512Mb)
DDR(512Mb)
DDR2(512Mb)
DDR2(512Mb)
NAND-Flash
(512Mb)
LGE3159GV
S5
KIA7427F
For wired & Ge eral
LGE7329
Ursa
USB
RS-232
O ly for service
WT61P8
Micom
MODULE
HDMI_2 HDMI_3
NOT FOR USER Co ect to Rx b/d
MAIN BLOCK-DIAGRAM
BLOCK DIAGRAM_TV

17 LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SATURN 5
SUB_SCL SUB_SDA
NVRAM
EEPROM NTP3100
IC101
0xA0
IC400
0x54
SDA0 SCL0
FRC MEMC_SDA
MEMC_SCL
IC701
0xXX
HDMI1 HDMI0
MICOM
WELTREND
SDA1 SCL1
IC902
0x50
MICOM_SDA MICOM_SCL
IC100
0xXX
MICOM_ISP_SDA
MICOM_ISP_SCL
WIRELESS_SCL WIRELESS_SDA
IR & LED B/D EYE_LED_SCL
EYE_LED_SDA
I2C +5V
I2C +3.3V
HDMI0 HDMI1 HDMI1_SDA
HDMI1_SCL
ATMEL
IC102
0x70
CM3212
IC101
0x90
IR & DIGITAL EYE & MOVING LED
HDMI JACK HDMI0: WIRELESS (WITH RX B/D) HDMI1: WIRELD (AV BOX) & OTHERS
DDC
EDID
IC300
MOVING LED
HDCP
EEPROM
IC105
0xA8
EYE-Q
MAIN I2C LOAD MAP
BLOCK DIAGRAM_TV

18 LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
+5V_ST
IC602
AP1117E33G
LDO
Q606
FET
IC600
SC4215
LDO
+3.3V_ST +3.3V_AVDD_MPLL
+5V +3.3V
+3.3V_MEMC
+1.26_MEMC
+1.8V_DDR
+3.3V_ST_MICOM
IC701
IC100
IC100/IC101/IC102/IC103/IC105/IC400/IC902/SUB_BD BOOT STRAP/SCL1+SDA1 IC605_EN
IC100/IC104(HW_RESET)
IC700/IC701
Q300/IC500/IC503/IC505 RL_ON/INV_CTL/MEMC_RESET/LED_ON/KEY
IC902
IC300 RS-232/FRC_ISP
SUB_BD/AC_DET/POWER_DET/RL_ON
Q608
TR
IC601
MP2212DN
DC/DC
+3.3V_VDDP IC100
IC401
AZ1117
LDO
+1.8V_AMP IC400
+1.8V_S_DDR IC100/IC200/IC201
IC608
APE8953
LDO
+5V_GENERAL IC603_EN/IC608_EN
POWER_DET/INV_CTL/SCL0+SDA0
IC605
MP2212
DC/DC
+1.26V_VDDC IC100
EAN57653801
0IPMGS1010A
EAN57770801
MAIN POWER MAP_1
BLOCK DIAGRAM_TV

19 LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Q606
FET
12V_TCON
+12V
IC603
MP2212DN
DC/DC
+5V_EXT
MODULE
+24V +24V_AMP IC400
IC506
IC606
MP2212DN
DC/DC
+1.8V_MEMC IC701
POWER_DET
I501
MP2212DN
DC/DC
+5V_Wireless P502 (RX BOARD)
+1.8V_FRC_DDR IC800/IC801
LIPS: +20V PSU: +24V
MAIN POWER MAP_2
BLOCK DIAGRAM_TV

20 LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
MSTAR
SATURN6
[MSD3368GV]
RGB
COMPONENT1
AV1 AV1_CVBS_IN
DSUB_ R/G/B FE_VMAIN TS_DATA[0:7]
SPDIF
SPDIF_OUT
DSUB_H/VSYNC
AUDIO IN DGB_TX/RX
USB
PCM_A[0:7] ADDR_D[0:15] BDDR_D[0:15] ADDR_A[0:12]
USB Power
BDDR_A[0:12]
USB_DM/DP
HDMI 1/2/3/4R ear : 3 Front :1
TMDS[0:7]
HDMI_CEC HPD 5V_HDMI
I2S
30P Wafer : rear jack b’d & main b’d (P1200)
To TV For wireless
HDMI I
HDMI
Out
I2C
IR (For test)
LVDS TTL
I2C
SPI_CK/CS/D0/D1
Rear jack b’d
IF
FE_SIF
COMPONENT2
AV2 AV2_CVBS_IN
COMP1_Y/Pb/Pr COMP2_Y/Pb/Pr
Can T ner
(TDVW-H154F) Demod lator
(LGDT3305)
RS-232C
(MAX3232CDR)
HDMI Splitter
(PI3HDMI1210)
HDMI
Transmitter
(SiI9134)
LVDS Receiver
(THC63LVD1024)
Serial Flash
For Boot
DDR2 SDRAM
(1Gbit)
HYNIX
DDR2 SDRAM
(512Mbit)
HYNIX
MICOM
Weltrend
NAND Flash
HYNIX
(64MB)
EEPROM
AT24C512
MIC2009YM6-TR
USB Power
HDMI
4:1 Switch
(TDA9996)
Simple Block Diagram
BLOCK DIAGRAM_AV BOX