LG 47LG70YD User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LB81D
MODEL : 47LG70YD 47LG70YD-AA
website:http://biz.LGservice.com
Internal Use Only

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Only for training and service purposes
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CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION........................................................................................6
ADJUSTMENT INSTRUCTION................................................................11
TROUBLE SHOOTING............................................................................17
BLOCK DIAGRAM...................................................................................21
EXPLODED VIEW .................................................................................. 33
SVC. SHEET ...............................................................................................

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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 Replacement Parts List.
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 1MΩand 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 Hot 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 Hot 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

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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

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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.

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SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
4. General specification
Item Specification Remark
Broadcasting system PAL-BG, DTV : DVB-T
Available Channel 1) VHF : 00 ~ 12
2) UHF : 20 ~ 75
3) CATV : 02 ~ 44
4) DTV : 06 ~12, 27 ~ 69
Tuner IF 1) PAL : 38.90MHz(Picture),
34.40MHz(Sound)
2) DVB-T : 36.125MHz
Input Voltage 100 - 240V~, 50/60Hz Mark : 240V, 50Hz
Screen Size 47 inch Wide (1920 x 1080) 47LG70YD-AA
52 inch Wide (1920 x 1080) 47LG70YD-AA
Aspect Ratio 16:9
Module LC470WUD-SAA1 47LG70YD-AA
LK520D3LZ97 52LG70YD-AA
Operating Environment 1) Temp : 0 ~ 40 deg LGE Spec
2) Humidity : ~ 80 %
Storage Environment 1) Temp : -20 ~ 60 deg
2) Humidity : ~ 85 %
1. Application range
This specification is applied to the LCD TV used LB81D
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
1) Temperature : 25±5ºC (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: CB specification
- EMC: CISPR 13 specification

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5. Chrominance & Luminance Specification
No Item Min Typ Max Unit Remark
1. White peak brightness 400 500 cd/m247LG70YD-AA
360 450 cd/m252LG70YD-AA
2. Contrast ratio cd/m2N/A
3. Brightness uniformity 70 % Full white
4. Color coordinate RED X Typ. 0.638 Typ. 47LG70YD-AA
Y -0.03 0.335 +0.03
GREEN X 0.289
Y 0.609
BLUE X 0.145
Y 0.063
WHITE X 0.279
Y 0.292
RED X 0.610 0.640 0.670. 52LG70YD-AA
Y 0.300 0.330 0.360
GREEN X 0.250 0.280 0.310
Y 0.570 0.600 0.630
BLUE X 0.120 0.150 0.180
Y 0.030 0.060 0.090
WHITE X 0.242 0.272 0.302
Y 0.247 0.277 0.307
5. Color coordinate uniformity N/A
6. Contrast ratio 900 1300 47LG70YD-AA
1200 1800 52LG70YD-AA
7. Color Temperature Cool 11,000 <Test Condition>
Medium 9,300
HDMI input,
Warm 6,500 85% Full white pattern
8. Color Distortion, DG 10.0 %
9. Color Distortion, DP 10.0 deg
10. Color S/N, AM/FM 43 dB
11. Color Killer Sensitivity -80 dBm

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7. RGB PC INPUT Mode
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1 720*400 31.468 70.08 28.321
2 640*480 31.469 59.94 25.17 VESA Input 848*480 60Hz, 852*480 60Hz
37.684 75.00 31.50 --> 640*480 60Hz Display
3 800*600 37.879 60.31 40.00 VESA
46.875 75.00 49.50
4 1024*768 48.363 60.00 65.00 VESA(XGA)
56.470 70.00 75.00
60.123 75.029 78.75
5 1280*768 47.78 59.87 79.5 WXGA
6 1360*768 47.72 59.8 84.75 WXGA
7 1366*768 47.56 59.6 84.75 WXGA
8 1280*1024 63.595 60.0 108.875 SXGA
9 1920*1080 66.647 59.988 138.625 WUXGA
6. Component Video Input (Y, PB, PR)
No Specification Remark
Resolution H-freq(kHz) V-freq(Hz)
1 720x480 15.73 59.94 SDTV, DVD 480i
2 720x480 15.75 60 SDTV, DVD 480i
3 720x480 31.47 59.94 SDTV 480p
4 720X480 31.5 60 SDTV 480p
5 720x576 15.625 50 SDTV, DVD 576i
6 720x576 31.25 50 SDTV 576p
7 1280x720 44.96 59.94 HDTV 720p
8 1280x720 45 60.36 HDTV 720p
9 1280x720 37.5 50 HDTV 720p
10 1920x1080 28.125 50 HDTV 1080i
11 1920x1080 33.75 60 HDTV 1080i
12 1920x1080 33.72 59.94 HDTV 1080i
13 1920x1080 56.25 50 HDTV 1080p
14 1920x1080 67.433 59.94 HDTV 1080p
15 1920x1080 67.5 60 HDTV 1080p

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7. HDMI Input (PC/DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
PC
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
56.470 70.00 75.00
5 1280*768 47.78 59.87 79.5 WXGA HDCP
6 1360*768 47.72 59.8 84.75 WXGA HDCP
7 1366*768 47.56 59.6 84.75 WXGA HDCP
8 1280*1024 63.595 60.0 108.875 SXGA
9 1920*1080 66.647 59.988 138.625 WUXGA
DTV
1 720*480 31.47 59.94 27.00 SDTV 480P(4:3)
2 720*480 31.50 60 27.027 SDTV 480P(4:3)
3 720*480 31.47 59.94 27.000 SDTV 480P(16:9)
4 720*480 31.50 60.00 27.027 SDTV 480P(16:9)
5 720*576 31.25 50.00 27.000 SDTV 576P
6 1280*720 37.50 50.00 74.176 HDTV 720P HDCP
7 1280*720 44.96 59.94 74.176 HDTV 720P HDCP
8 1280*720 45.00 60.00 74.250 HDTV 720P
9 1920*1080 33.72 59.94 74.176 HDTV 1080I HDCP
10 1920*1080 33.75 60.00 74.250 HDTV 1080I HDCP
11 1920*1080 28.125 50.00 74.250 HDTV 1080I 50Hz HDCP
12 1920*1080 27.000 24.00 74.250 HDTV 1080P 24Hz HDCP
13 1920*1080 56.250 50 148.500 HDTV 1080P 50Hz HDCP
14 1920*1080 67.433 59.94 148.352 HDTV 1080P HDCP
15 1920*1080 67.500 60 148.500 HDTV 1080P HDCP

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8. Mechanical specification
8-1. 47LG70YD-AA
No. Item Content Unit Remark
1. Product Widt(W) Length(D) Height(H) mm
Dimension Before Packing 1034 293.4 735 mm With Stant
After Packing 1330 257 772 mm
2. Product Only SET 23.5 Kg
With BOX 26.2 Kg
8-2. 52LG70YD-AA
No. Item Content Unit Remark
1. Product Widt(W) Length(D) Height(H) mm
Dimension Before Packing 1156.2 342.9 813.1 mm With Stant
After Packing 1266 460 887 mm
2. Product Only SET 29.5 Kg
With BOX 35.4 Kg

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ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LCD TV with
LB81D chassis.
2. Designation
1) The adjustment is according to the order which is
designated 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 Specification Standard
5) Reserve after operation: Above 5 Minutes (Heat Run)
Temperature : at 25±5ºC
Relative humidity : 65±10%
Input voltage : 220V, 60Hz
6) Adjustment equipments: Color Analyzer (CA-210 or CA-
110), Pattern Generator (MSPG-925L or Equivalent), DDC
Adjustment Jig equipment, SVC remote controller
7) Don’t push The “IN STOP KEY” after completing the
function inspection.
3. Main PCB check process
* APC - After Manual-Insult, executing APC
* Download
1) Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
2) Set as below, and then click “Auto Detect” and check “OK”
message. If display “Error”, Check connect computer, jig,
and set.
3) Click “Connect” tab. If display “Can’t”, Check connect
computer, jig, and set.
4) Click “Read” tab, and then load download file(XXXX.bin) by
clicking “Read”.
5. Click “Auto” tab and set as below
6. Click “Run”.
7. After downloading, check “OK” message.
* USB DOWNLOAD
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) Fishing the version uploading, you have to put USB stick
and “AC Power” off.
6) After putting “AC Power” on and check updated version on
your TV.
USB
(1) (3)
(2) OK
Please Check Speed :
To us speed between from 200 KHz
to 400 KHz
(4)
filexxx.bin
(5)
(7) ........ OK
(6)
filexxx.bin

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* After downloading, have to adjust Tool Option again.
1) Push "IN-START" key in service remote controller
2) Select "MODEL SELECT" and Push “OK” button.
3) Go To “INCH” and choice proper inch.
4) TV power turn off and on.
5) Completed selecting Tool option
3.1. ADC Process
(1) PC input ADC
1) Auto RGB Gain/Offset Adjustment
- Convert to PC in Input-source
- Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 in Pattern Generator
Pattern : 65 in Pattern Generator (MSPG-925 Series,
MPSG-1025D) - 7 color bar.
[gray pattern that left & right is black and center is
white signal(Refer below picture)]
- Adjust by commanding AUTO_COLOR_ADJUST.
2) Confirmation
-We confirm whether “0xAA (RGB)” address of
EEPROM “0xA2” is “0xAA” or not.
- If “0xAA (RGB)” address of EEPROM “0xA2” isn’t
“0xAA”, we adjust once more
- We can confirm the ADC values from “0xA4~0XA9
(RGB)” addresses in a page “0xA2”
* Manual ADC process using Service Remocon. After
enter Service Mode by pushing “ADJ” key,
execute “ADC Adjust” by pushing “G” key at “ADC
CALIBRATION: RGB-PC”.
(2) COMPONENT input ADC
1) Component Gain/Offset Adjustment
- Convert to Component in Input-source
- Signal equipment displays
Impress Resolution 480i
MODEL : 209 in Pattern Generator(480i Mode)
Pattern : 65 in Pattern Generator (MSPG-925 Series,
MPSG-1025D) - 7 color bar.
Impress Resolution 1080i
Model : 223 in Pattern Generator(1080i Mode)
Pattern: 65 in Pattern Generator (MSPG-925 Series,
MPSG-1025D) - 7 color bar.
- Adjust by commanding AUTO_COLOR_ADJUST.
2) Confirmation
-We confirm whether “0xB3 (480i)/0xBC (1080i)”
address of EEPROM “0xA2” is “0xAA” or not.
- If “0xB3 (480i)/0xBC(1080i)” address of EEPROM
“0xA2” isn’t “0xAA”, we adjust once more.
- We can confirm the ADC values from “0xAD~0XB2
(480i)/0XB6~BB (1080i)” addresses in a page “0xA2”.
* Manual ADC process using Service Remocon.
After
enter Service Mode by pushing “ADJ” key, execute “ADC
Adjust” by pushing “
G ” key at “ADC CALIBRATION :
COMPONENT”.
Impress Resolution 480i
Impress Resolution 1080i
3.2. Function Check
(1) Check display and sound
- Check Input and Signal items. (cf. work instructions)
1) TV
2) AV
3) COMPONENT (480i)
4) RGB (PC : 1024 x 768 @ 60hz)
5) HDMI
6) PC Audio In
* Display and Sound check is executed by Remote
controller.
<Fig. 1> Adjustment pattern(PC)

4. Total Assembly line process
4.1. Adjustment Preparation
(1) W/B Equipment condition
CA210: CH 9, Test signal: Inner pattern (85IRE)
(2) Above 5 minutes H/run in the inner pattern. (“power on”
key of adjust remote control)
(3) 15 Pin D-Sub Jack is connected to the AUTO W/B
EQUIPMENT.
(4) Adjust Process will start by execute I2C Command (Inner
pattern (0xF3, 0xFF).
(5) Adjust Process will finish by execute I2C Command (Inner
pattern (Inner pattern (0xF3,0x00)).
(6) At the adjust W/B/, the spec of luminance set the Min 200
cd/m2
(7) In specially, the spec of luminanec set the Min 150 cd/m2
at the module of sharp(52”)
** 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 control.
- After enter Service Mode by pushing “ADJ” key,
- Enter White Pattern off of service mode, and change off
---> on.
-Enter “W/B ADJUST” by pushing “G” key at “3.W/B
ADJUST”.
- The default value of RGB-GAIN is 192 at cool, Medium,
Warm
(There is a difference between picture image and set)
* After done 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 correct it to the model’s module from factory JIG model.
* Don’t push The “IN STOP KEY” after completing the function
inspection.
4.2. DPM operation confirmation
(Only Apply for MNT Model)
Check if Power LED Color and Power Consumption operate
as standard.
- Set Input to RGB and connect D-sub cable to set
- Measurement Condition: (100-240V@ 50/60Hz)
- Confirm DPM operation at the state of screen without Signal
4.3. DDC EDID Write
In case of 2008 year new model for Australia and Taiwan
which is developed with Mstar scaler, Manufacture have
no use for dwnload of EDID for HDMI1/2/3/4 because
HDMI EDID data is in the Application Program
4.3.1 Analog data 128Byte(2Bi)
EDID block 0, Bytes 0-127[00H-7FH]
Block Type : EDID 1.3
4.3.2 Digital data(HDMI-1) 256Byte
EDID block 0, Bytes 0-127[00H-7FH]
Block Type : EDID 1.3
EDID block 1, Bytes 128-255[80H- FFH]
Block Type : CEA EDID Timing Extension Version 3.
- 13 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
C2008
Color Cool 11,000 ºK X=0.276(±0.002) <Test Signal>
Temperature Y=0.283(±0.002) Inner patern
Medium 9,300 ºK X=0.285(±0.002) (216gray,85IRE)
Y=0.293(±0.002)
Warm 6,500 ºK X=0.313(±0.002)
Y=0.329(±0.002)
012345 67 8 9ABCDEF
0 00FFFFFFFFFFFF001E6DFB9C0101 0101
10 0A 12 01 03 01 46 27 78 EA D9 B0 A3 57 49 9C 25
20 11 49 4B A5 4E 00 31 40 45 40 61 40 81 80 01 01
30 01 01 D1 C0 01 01 1A 36 80 A0 70 38 1F 40 30 20
40 35 00 E8 26 32 00 00 1A 1B 21 50 A0 51 00 1E 30
50 48 88 35 00 BC 86 21 00 00 1C 00 00 00 FD 00 39
60 4B 1F 54 12 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 E4
01234 5 678 9ABCDEF
0 00FFFFFFFFFFFF001E6DFC9C0101 0101
10 0A 12 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C A1 0C 00 31 40 45 40 61 40 81 80 D1 C0
30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 45 00 C4 8E 21 00 00 1E 01 1D 00 BC 52 D0 1E 20
50 B8 28 55 40 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 6B
01234 5 678 9ABCDEF
0 020323f14E93141204050302201F2122
10 10 07 16 23 15 07 50 83 01 00 00 67 03 0C 00 10
20 00 B8 2D 01 1D 80 D0 72 1C 16 20 10 2C 25 80 C4
30 8E 21 00 00 9E 8C 0A D0 90 20 40 31 20 0C 40 55
40 00 C4 8E 21 00 00 18 01 1D 00 72 51 D0 1E 20 6E
50 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16
60 20 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10

4.3.3 Digital data(HDMI-2) 256Byte
EDID Block 0, Byte 0-127[00H-7FH]
Block Type : EDID 1.3
EDID block 1, Bytes 128-255[80H- FFH]
Block Type : CEA EDID Timing Extension Version 3.
4.3.2 Digital data(HDMI-3) 256Byte
EDID Block 0, Byte 0-127[00H-7FH]
Block Type : EDID 1.3
EDID block 1, Bytes 128-255[80H- FFH]
Block Type : CEA EDID Timing Extension Version 3.
1) All Data : HEXA Value
2) Changeable Data :
*: Serial No : Controlled / Data:01
**: Month : Controlled / Data:00
***:Year : Controlled
****:Check sum
Because RGB/HDMI EDID Data is downloaded from flash
memory to EDID data storage EEPROM automatically when you
push down “power only key”, Download progress is not needed.
4.7. HDCP (High-Bandwidth Digital Contents Protection)
SETTING (Scaler : Mstar)
Because HDCP key is built in HDCP exclusive EEPROM,
Download progress is not needed.
HDCP-KEY - Not USE
0:0x80
89 38 AE 0D ED 40 E6 BB FA 4E DE 51 FB 8E D9 AA
34 A8 C4 EA D8 6C DC 5C 91 5C B1 A6 13 2B 8B 8B
F7 46 CC 1C 88 20 A3 27 0E E1 28 84 89 39 A3 E2
36 86 CE 67 EB A0 F2 35 6B 86 F5 21 71 95 8A 77
A1 28 77 97 D3 7B EF 5C 15 48 AA 9E 97 39 CD 98
40 5E 68 56 66 EF C1 3C E1 8F 2A 82 DE 8F 52 CC
A8 1F 37 D9 D4 C6 24 16 7E 42 FF 57 CD 6B E0 86
00 1A F1 19 5A AF 37 97 86 BA 83 29 FE 41 A8 D5
A1:0x00
F4 73 43 03 23 22 C5 28 96 9E 35 0D 67 A8 8B DD
7A 89 38 E0 94 F0 FF F5 8F F3 4E 5C 82 09 F3 97
EB 01 52 EC D8 98 5C 4F 43 2E E7 9F F5 85 6D 15
B1 83 20 F8 5E D0 33 4F F0 C1 8F 65 77 3D 31 B2
FB A1 6E CA A6 D3 A2 35 1D 16 41 C3 89 86 98 78
8E 3E C1 64 01 79 05 21 47 AF 6A 6F 5B E1 4D 2B
2F CC 18 8E 42 DC 9A F8 3C D0 D0 57 04 FB 14 42
8C 54 9D A9 06 EB E7 48 E2 29 EF 7E FD F6 45 12
AC E4 BC 45 67 A3 9B 65 A1 0E ED 1A 84 AD 49 87
A2 77 3F 11 A7 1B D1 7F 25 36 6C 6F D3 DF 25 D0
FB
4.11 Outgoing condition Configuration
- fffff and make ship condition
- When pressing IN-STOP key by Service remocontrol, Red
LED are blinked alternatively. And then Automatically turn
off. (Must not AC power OFF during blinking)
4.12 Internal pressure
Confirm whether is normal or not when between power
board's ac block and GND is impacked on 1.5kV(dc) or
2.2kV(dc) for one secon
- 14 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
C2008
01234 5 678 9ABCDEF
0 00FFFFFFFFFFFF001E6DFC9C01010101
10 0A 12 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C A1 0C 00 31 40 45 40 61 40 81 80 D1 C0
30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 45 00 C4 8E 21 00 00 1E 01 1D 00 BC 52 D0 1E 20
50 B8 28 55 40 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 6B
01234 5 678 9ABCDEF
0 020323F14E93141204050302201F2122
10 10 07 16 23 15 07 50 83 01 00 00 67 03 0C 00 20
20 00 B8 2D 01 1D 80 D0 72 1C 16 20 10 2C 25 80 C4
30 8E 21 00 00 9E 8C 0A D0 90 20 40 31 20 0C 40 55
40 00 C4 8E 21 00 00 18 01 1D 00 72 51 D0 1E 20 6E
50 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16
60 20 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
01234 5 678 9ABCDEF
0 00FFFFFFFFFFFF001E6DFC9C01010101
10 0A 12 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C A1 0C 00 31 40 45 40 61 40 81 80 D1 C0
30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 45 00 C4 8E 21 00 00 1E 01 1D 00 BC 52 D0 1E 20
50 B8 28 55 40 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 6B
01234 5 678 9ABCDEF
0 020323F14E93141204050302201F2122
10 10 07 16 23 15 07 50 83 01 00 00 67 03 0C 00 30
20 00 B0 2D 01 1D 80 D0 72 1C 16 20 10 2C 25 80 C4
30 8E 21 00 00 9E 8C 0A D0 90 20 40 31 20 0C 40 55
40 00 C4 8E 21 00 00 18 01 1D 00 72 51 D0 1E 20 6E
50 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16
60 20 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 F0

5. Adjustment Command
5.1. I2C(100K BPS)
5.2. COMMUNICATION START
# Until ACK BIT goes LOW, Repeat it.
5.3. Command form
Command form use DDC2AB standard communication
protocol.
a. LEN : DATA BYTE number to send
b. CMD : Command language theat monitor executes.
c. VAL : FOS DATA
d. CS : Dada’s CHECKSUM that transmit
e. DELAY : 50Ms
f. A : Acknowledge
5.5. EEPROM DATA READ
(1) Signal TABLE
(2) Command Set
*Purpose : To read(84h) the appointment Address of
E2PROM by 128(80h)-byte
5.4. Adjustment Commands(LENGTH=84)
- 15 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
C2008
START 6E ASTOP 50Ms
START 6E A50 A A A A A A A30 00 CS STOPLEN CMD VAL
Adjustment Contents CMD(hex) ADR VAL[HEX] Description
FACTORY ON E0 00 00 Factory mode on
FACTORY OFF E2 00 00 Factory mode off
EEPROM ALL INIT. E4 00 00 EEPROM All clear
EEPROM Read E7 00 00 EEPROM Read
EEPROM Write E8 00 data EEPROM Write by
some values
COLOR SAVE EB 00 00 Color Save
(R/G/B cutoff, Drive,
Contrast, Bright)
H POSITION 20 00 00 – 64 They have different
V POSITION 30 00 00 – 64 range each mode,
CLOCK 90 00 00 – 64 FOS Adjustment
PHASE 92 00 00 – 64
R DRIVE 16 00:cool 00 – 80 Drive adjustment
01:medium
02:warm
G DRIVE 18 00 :cool 00 – 80
01:medium
02:warm
B DRIVE 1A 00:cool 00 – 80
01:medium
02:warm
R CUTOFF 80 00 00 – 7F Offset adjustment
G CUTOFF 82 00 00 – 7F
B CUTOFF 84 00 00 – 7F
BRIGHT 10 00 00 – 3F Bright adjustment
CONTRAST 12 00 00 - 64
Luminance adjustment
AUTO_COLOR_ F1 00 02 Auto COLOR
ADJUST Adjustment
CHANGE_COLOR_ F2 00 0,1,2,3 0: Cool
TEMP 1: Medium
2: Warm
3: User
White Pattern F3 00 00,FF 00: White pattern off
FF: White pattern on
AUTO_ F4 00 0,10,20,30, 0 : TV
INPUTCHANGE 40,60,90 10 : DTV
20 : SCART1
30 : SCART2
40 : Component
60 : RGB
90 : HDMI
128 Bytes
Delay 100ms
EEPROM READ E7 A0 0 0-Page 0~7F Read
80 0-Page 80~FF Read
A2 0 1-Page 0~7F Read
80 1-Page 80~FF Read
A4 0 2-Page 0~7F Read
80 2-Page 80~FF Read
A6 0 3-Page 0~7F Read
80 3-Page 80~FF Read
Adjustment item CMD(hex) ADH(hex) ADL(hex) Details

5.6. E2PROM Data Write
(1) Signal TABLE
LEN : 84h+Bytes
CMD : 8Eh
ADH : E2PROM Slave Address(A0,A2,A4,A6,A8), Not 00h
(Reserved by Buffer To EEPROM)
ADL : E2PROM Sub Address(00~FF)
Data : Write data
(2) Command Set
* Purpose
1) EDID write : 16-byte by 16-byte, 8 order (128-byte)
write(TO “00 – 7F” of “EEPROM Page A4”).
2) FOS Default write : 16-mode data (HFh, HFl, VF, STD,
HP, VP, Clk, ClkPh, PhFine) write
3) Random Data write : write the appointment Address of
E2PROM.
5.7. NVRAM Read
- Send CMD(70h) to read Video RAM value from MICOM And
save its value to 128-Bytes Buffer(Common Buffer for the
use of EDID)
- Delay 500ms (Time to Wait and Read Video RAM from
MICOM)
- Be transmitted the contents of MICOM’s 128-bytes Buffer to
PC. (128th Data is the CheckSum of 127-bytes data : That’s
OK if the value of adding 128-bytes Data is Zero)
- 16 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
C2008
Delay 20m
EEPROM WRITE E8 94 16-Byte Write
84+n n-byte Write
Adjustment item CMD(hex) LEN Remark
70 00 00
6F A A
Data 1START Data 128 STOPNACS...

LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
C2008
- 17 -
1. TV/CATV doesn’t display
2. DTV doesn’t display
TROUBLESHOOTING
Check TU401 Pin15(Video output),
Pin16(Sound output)
Can you see the normal signal?
Check the output of TR(Q503).
Can you see the normal waveform?
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
YES
NO Could you measure voltage of TU800 & IIC
lines?
Are they all normal?
YES
NO You should check power line
& IIC lines.
YES
You should replace TUNER.
NO You should decide to replace TR(Q503) or not.
NO After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.
Check the output data of TU800 Pin 24~34
Can you see the normal signal?
NO Could you measure voltage of TU800 & IIC
lines?
Are they all normal?
NO You should check power line
& IIC lines.
YES
You should replace TUNER.
YES
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.

LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
C2008
- 18 -
3. AV doesn’t display
Check J600,J600,JK607,JK618
Can you see the normal waveform?
Check the input of Video switch(IC700).
Can you see the normal waveform?
YES
NO J600,J601 or SIDE AV may have problem.
Replace this Jack or SIDE AV.
NO After checking the Power of AV switch you
should decide to replace AV switch or not.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.
YES
4. Component doesn’t display
Check J701.
Can you see the normal waveform?
Check the input of Component Audio
switch(IC1001) ,
Can you see the normal waveform?
Check the output of Component Audio
switch(IC1001) ,
Can you see the normal waveform?
YES
YES
YES
NO J701
may have problem. Replace this Jack.
NO After checking the Power of component Audio
switch, you should decide to replace component
Audio switch or not.
NO After checking the Power of component Audio
switch you should decide to replace component
Audio switch or not.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.

LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
C2008
- 19 -
5. RGB PC doesn’t display
Check J703 ,
Can you see the normal waveform?
Check the input of RGB Audio
switch(IC1001) ,
Can you see the normal waveform?
Check the output of RGB Audio
switch(IC1001) ,
Can you see the normal waveform?
YES
YES
YES
NO J703
may have problem. Replace this Jack.
NO After checking the Power of RGB Audio switch,
you should decide to replace RGB Audio switch
or not.
NO After checking the Power of RGB Audio switch
you should decide to replace RGB Audio switch
or not.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.
Check the input of RGB Video
switch(IC700) ,
Can you see the normal waveform?
NO After checking the Power of RGB Video switch,
you should decide to replace RGB Video switch
or not.
YES

- 20 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
C2008
6. HDMI doesn’t display
Check input connect J900 , J901, J902
Can you see the normal waveform?
Check DDC communication lines(IC900,
IC901, IC903 Pin5,6)
Check the input of HDMI Seitch(IC902)
This signal is TMDS.
Can you see the normal waveform?
YES
YES
NO J900 , J901, J902
may have problem. Replace this Jack.
Check the output of HDMI Switch(IC902).
Can you see the normal waveform?
YES
YES
NO
After checking the trace of TMDS lines and power of
HDMI Switch, you should decide to replace HDMI
Switch or not.
NO
NO
After checking the Power of this chip, you
should decide to replace this or not.
After checking the Power of HDMI Switch you
should decide to replace MST3361 or not.
YES
Check HDCP communication lines(IC902) NO After checking the Power of this chip, you
should decide to replace this or not.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.