LG 32LH7000 User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LD91D
MODEL : 32LH7000 32LH7000-ZA
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only

LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION ........................................................................................6
ADJUSTMENT INSTRUCTION ...............................................................10
TROUBLE SHOOTING ............................................................................15
BLOCK DIAGRAM...................................................................................19
EXPLODED VIEW .................................................................................. 20
SVC. SHEET ...............................................................................................

LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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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 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 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
When 25A is impressed between Earth and 2nd Ground
for 1 second, Resistance must be less than 0.1
*Base on Adjustment standard
IMPORTANT SAFETY NOTICE
0.15uF
Ω

LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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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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Only for training and service purposes
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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
1. Application range
This specification is applied to the LCD TV used LD91D
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 5 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
No Item Specification Remark
1 Display Screen Device 32 wide Color Display Module LCD
2 Aspect Ratio 16:9
3 LCD Module 32” TFT LCD FHD 100Hz LGD
4 Operating Environment Temp. : 0 ~50 deg
Humidity : 20 ~90 %
5 Storage Environment Temp. : -20 ~60 deg
Humidity : 10 ~90 %
6 Input Voltage AC100-240V~, 50/60Hz
7 Power consumption Power on (White)
32” LGD Typ : 110, Max : 120 LCD(Module) + Backlight(Lamp)
8 Module Size 32” LGD 760.0(H) x 450.0(V) x 48.00mm(D) With inverter
9 Pixel Pitch 32” LGD 0.36375(H) x 0.36375(V)
10 Backlight 16 EEFL
11 Display Colors 1.06B(true) colors
12 Coating 3H(Hard coating)

5. Chroma& Brightness
(1) Module optical specification
1) Stable for approximately 60 minutes in a dark environment at 25ºC
2) Operating Ambient Humidity : Min 10, Max 90 %RH
3) Supply Voltage : 24V
4) Frame Frequency : 120Hz
(2) Chroma (PSM: Vivid, Color Temperature: Cool)
- except “RGB PC Mode PSM:Standard,Color Temperature:Medium”
**The W/B Tolerance is ±0.002 for Adjustment, but for DQA ±0.015
(3) SET Optical Feature
1) General feature
* Measurement Condition: Full white/Dynamic) -> Measure the black luminance after 30 seconds.
2) Special feature (Dynamic CR 15000:1)
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No Item Min Typ Max Remark
1. Cool White Balance,X axis 0.274 0.276 0.278 DQA :±0.015
White Balance,Y axis 0.281 0.283 0.285 DQA :±0.015
2. Medium White Balance,X axis 0.283 0.285 0.287 DQA :±0.015
White Balance,Y axis 0.291 0.293 0.295 DQA :±0.015
3. Warm White Balance,X axis 0.311 0.313 0.315 DQA :±0.015
White Balance,Y axis 0.327 0.329 0.331 DQA :±0.015
No Item Min typ Max Inch Power Board P/N Remark
1 Dynamic CR 10000 15000 32” EAY58473201 HDMI 720p Full Black Pattern
(Only HDMI mode)
No Item Module Luminance (min) C/R(min) Remark
AV,COMPONENT,HDMI AV,COMPONENT,HDMI
1. 32 inch LGD 400cd/m2900 except from the PC mode.
No. Item Specification Min. Typ. Max. Remark
1. Viewing Angle<CR>10> Right/Left/Up/Down 89/89 CR>10
89/89
2. Luminance Luminance (cd/m2) 400 500 PSM:Vivid,CSM:Cool,
White(100IRE)
Dynamic contrast :off
Dynamic color L off
Variation 1.3 MAX /MIN
3. Contrast Ratio CR 900 1300
4. CIE Color Coordinates White Wx Typ 0.279 Typ PSM:Vivid,CSM:Cool,
Wy -0.03 0.292 +0.03 White(85IRE)
RED Xr 0.638 Dynamic contrast :off
Yr 0.334 Dynamic color L off
Xg 0.291
Green Yg 0.607
Xb 0.145
Blue Yb 0.062

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6. Component Video Input (Y, PB, PR)
No Specification Remark
Resolution H-freq(kHz) V-freq(Hz)
1. 720x480 15.73 60.00 SDTV,DVD 480i
2. 720x480 15.63 59.94 SDTV,DVD 480i
3. 720x480 31.47 59.94 480p
4. 720x480 31.50 60.00 480p
5. 720x576 15.625 50.00 SDTV,DVD 625 Line
6. 720x576 31.25 50.00 HDTV 576p
7. 1280x720 45.00 50.00 HDTV 720p
8. 1280x720 44.96 59.94 HDTV 720p
9. 1280x720 45.00 60.00 HDTV 720p
10. 1920x1080 31.25 50.00 HDTV 1080i
11. 1920x1080 33.75 60.00 HDTV 1080i
12. 1920x1080 33.72 59.94 HDTV 1080i
13. 1920x1080 26.97/27 23.97/24 HDTV 1080p
14. 1920x1080 33.716/33.75 29.976/30.00 HDTV 1080p
15. 1920x1080 56.250 50 HDTV 1080p
16. 1920x1080 67.43/67.5 59.94/60 HDTV 1080p
7. RGB PC INPUT
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1. 720x400 31.468 70.08 28.321
2. 640x480 31.469 59.94 25.17 VESA
37.684 75.00 31.50
3. 800x600 37.879 60.31 40.00 VESA
46.875 75.00 49.50
4. 832x624 49.725 74.55 57.283 Macintosh
5. 1024x768 48.363 60.00 65.00 VESA(XGA)
56.470 70.00 75.00
60.123 75.029 78.75
6. 1280x768 47.78 59.87 79.5 WXGA
7. 1360x768 47.72 59.8 84.75 WXGA
8. 1366x768 47.56 59.6 84.75 WXGA
9. 1280x1024 63.595 60.0 108.875 SXGA
10. 1920x1080 66.647 59.988 138.625 WUXGA

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8. HDMI Input (PC/DTV)
(1) DTV Mode
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1 720x480 15.734 /15.6 59.94 /60 27.00 SDTV 480I
2 720x480 31.469 /31.5 59.94 /60 27.00/27.03 SDTV 480P
3 720x576 15.625 50 27(54) SDTV 576
4 720x576 31.25 50 54 SDTV 576P
5 1280x720 37.500 50 74.25 HDTV 720P
6 1280x720 44.96 /45 59.94 /60 74.17/74.25 HDTV 720P
7 1920x1080 33.72 /33.75 59.94 /60 74.17/74.25 HDTV 1080I
8 1920x1080 28.125 50.00 74.25 HDTV 1080I
9 1920x1080 26.97 /27 23.97 /24 74.17/74.25 HDTV 1080P
10 1920x1080 33.716 /33.75 29.976 /30.00 74.25 HDTV 1080P
11 1920x1080 56.250 50 148.5 HDTV 1080P
12 1920x1080 67.43 /67.5 59.94 /60 148.35/148.50 HDTV 1080P
(2) PC Mode
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1 720x400 31.468 70.08 28.321 HDCP
2 640x480 31.469 59.94 25.17 VESA HDCP
37.684 75.00 31.50
3 800x600 37.879 60.31 40.00 VESA HDCP
46.875 75.00 49.50
4 832x624 49.725 74.55 57.283 Macintosh HDCP
5 1024x768 48.363 60.00 65.00 VESA(XGA) HDCP
56.470 70.00 75.00
60.123 75.029 78.75
6 1280x768 47.78 59.87 79.5 WXGA HDCP
7 1360x768 47.72 59.8 84.75 WXGA HDCP
8 1366x768 47.56 59.6 84.75 WXGA HDCP
9 280x1024 63.595 60.0 108.875 SXGA HDCP
10 1920x1080 66.647 59.988 138.625 WUXGA HDCP

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ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LCD TV with
LD91D 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-925 series or Equivalent)
DDC Adjustment Jig equipment, SVC remote controller
7) Push The “IN STOP KEY” - For memory initialization.
3. Main PCB check process
* APC - After Manual-Insult, executing APC
* Boot file 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 “Error” is displayed, Check connection between
computer, jig, and set.
3) Click “Read” tab, and then load download file (XXXX.bin)
by clicking “Read”
4) Click “Connect” tab. If “Can’t ” is displayed, Check
connection between computer, jig, and set.
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”.
filexxx.bin
(5)
(7) ……….OK
(5)
(6)
(3)
filexxx.bin
(1) (4)
Please Check the Speed :
To use speed between
from 200KHz to 400KHz
Case1 : Software version up
1. After downloading S/W by USB , TV set will reboot
automatically
2. Push “In-stop” key
3. Push “Power on” key
4. Function inspection
5. After function inspection, Push “I n-stop” key.
Case2 : Function check at the assembly line
1. When TV set is entering on the assembly line, Push
“In-stop” key at first.
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.

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.
* 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 hax their number)
4) Completed selecting Tool option.
3.1. ADC Process
(1) External ADC (Only adjust in the component mode 480I)
• Input the Signal in the Component 1 -Component 480I
(Adjusted only this mode)
MODEL: 209 in Pattern Generator(480i Mode)
PATTERN : 65 in Pattern Generator( MSPG-925 Series)
• After enter Service Mode by pushing “ADJ” key,
• Enter the 5 item and then Push the “Start” button
(2) Internal ADC(Only adjust in the RGB mode)
• After enter Service Mode by pushing “ADJ” key
• Enter ADC Calibration mode by pushing “G” key at “5.
ADC Calibration
• Push the Start button
(3) Function Check
- Check display and sound
• Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART1/SCART2/ CVBS)
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.
4. Total Assembly line process
4.1. Adjustment Preparation
• W/B Equipment condition
CA210 : CH 9, Test signal : Inner pattern (85IRE)
• Above 5 minutes H/run in the inner pattern. (“power on” key
of adjust remote control)
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Tool 1 2 3 4
Option 13824 3382 56744 2304
<Adjustment pattern(PC)>
Cool 11,000k ºK X=0.276(±0.002)
Y=0.283(±0.002) <Test Signal>
Medium 9,300k ºK X=0.285(±0.002) Inner pattern
Y=0.293(±0.002) (216gray,85IRE)
Warm 6,500k ºK X=0.313(±0.002)
Y=0.329(±0.002)

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* 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 influx of light like floodlight
around is blocked. (illumination is less than 10ux).
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 15minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others,
check the back light on.
• Auto adjustment Map(RS-232C)
** 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 Balance by pushing “G” key at “3. White
Balance”.
* 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.
* 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 (RGB 128Byte )
• 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.
4.4. DDC EDID Write (HDMI 256Byte)
• Check whether written EDID data is correct or not.
* For SVC main Ass’y, EDID have to be downloaded to Insert
Process in advance.
4.5. EDID DATA
1) All Data : HEXA Value
2) Changeable Data :
*: Serial No : Controlled / Data:01
**: Month : Controlled / Data:00
***:Year : Controlled
****:Check sum
- 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 the user
downloading .
- Use the proper cables below for EDID Writing.
Full White Pattern
COLOR
ANALYZER
TYPE: CA-210
RS-232C Communication
CA-210
RS-232C COMMAND CENTER
[CMD ID DATA] (DEFAULT)
Cool Mid Warm MIN Cool Mid Warm MAX
R Gain jg Ja jd 00 172 192 192 255
G Gain jh Jb je 00 172 192 192 255
B Gain ji Jc jf 00 192 192 172 255
R Cut 64 64 64 128
G Cut 64 64 64 128
B Cut 64 64 64 128
<Connecting picture ( On Automatic Control)>

* Edid data and Model option download (RS232)
- Manual Download
* Caution
Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
(1) Analog Data 128Byte (2Bi)
(2) DIGITAL DATA(HDMI-1/2/3/4) 256Byte
* Detail EDID Options are below
ⓐProduct ID
ⓑSerial No: Controlled on production line.
ⓒMonth, Year : Controlled on production line:
ex) Monthly : ‘09’ -> ‘09’
Year : ‘2006’ -> ‘10’
ⓓModel Name(Hex):
ⓔChecksum: Changeable by total EDID data.
ⓕVendor Specific(HDMI)
4.6. Outgoing condition Configuration
• When pressing IN-STOP key by SVC remocon, Red LED
are blinked alternatively. And then Automatically turn off.
(Must not AC power OFF during blinking)
4.7. Internal pressure
Confirm 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
MODEL MODEL NAME(HEX)
42LH7000 00 00 00 FC 00 34 32 4C 48 37 30 30 30 0A 20 20 20 20
- 13 - LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
NO. Item CMD1 CMD2 Data 0
Enter
download MODE
Download
‘ModeIn’ A00
When transfer the ‘Mode In’,
Carry the command.
Edid data and
Model option
download
Download A *Note1*Note2 Automatically download
(The use of a internal Data)
Adjust ‘Mode Out’ A90
Adjustment
Confirmation A99To check Download
on Assembly line.
E
E
E
E
For Analog EDID For HDMI EDID
D-sub to D-sub DVI-D to HDMI or HDMI to HDMI
No. Item Condition Hex Data
1 Manufacturer ID GSM 1E6D
2 Version Digital : 1 01
3 Revision Digital : 3 03
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF 00 1E 6D
0x01 01 08 46 27 78 EA D9 B0 A3 57 49 9C 25
0x02 11 49 4B A5 6E 00 31 40 45 40 61 40 81
(D1)
80
(C0)
90
(01)
40
(01)
0x03 D1
(01)
C0
(01)
01 01 01 01 1A
(1B)
36
(21)
80
(50)
A0
(A0)
70
(51)
38
(00)
1F
(1E)
40
(30)
30
(48)
20
(88)
0x04 35 00
E8
(BC)
26
(86)
32
(21)
00 00 1A
(1C)
DA
(26)
2F
(36)
78
(80)
E0
(A0)
51
(70)
1A
(38)
25
(1F)
40
(40)
0x05 58
(50)
98
(20)
14
(85)
00
(00)
E8
(BC)
26
(86)
32
(21) 00 00
1A
(18)
00
(00)
00
(00)
00
(00)
FD
(FC)
00
(00)
39
(33)
0x06 4B
(32)
1F
(4C)
54
(47)
12
(35)
00
(35)
0A
(30)
20
(30)
20
(0A) 20 20 20 20
0x07 00 e
d
b
a
d
c03
FF FF
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D
0x01 01 03 80 46 27 78 EA D9 B0 A3 57 49 9C 25
0x02 11 49 4B A5 6E 00 31 40 45 40 61 40
81
(D1)
80
(C0)
90
(01)
40
(01)
0x03 A9
(01)
40
(01)
D1
(01)
C0
(01) 01 01 1A (02)
36
(3A)
80
(80)
A0
(18)
70
(71)
38
(38)
1F
(2D)
40
(40)
30
(58)
20
(2C)
0x04 35
(45)
00
(00)
E8
(C4)
26
(8E)
32
(21)
00
(00)
00
(00)
1A
(1E) 1B 21 50 A0 51 00 1E 30
0x05 48 88 35 00 BC 86 21 00 00 1C 00
(00)
00
(00)
00
(00)
FD
(FC)
00
(00)
39
(33)
0x06 4B
(32)
1F
(4C)
54
(47)
12
(35)
00
(35)
0A
(30)
20
(30)
20
(0A) 20 20 20 20
0x07 01
0x00 02 03 23
(21)
F1 4E 81
(02)
02
(11)
03
(01)
15
(03)
12 13 04 14 05 20
(21)
21
(1F)
0x01 22
(20)
1F
(22) 10 23 09 07 07 83 01 00 00
0x02 01
(00)
1D
(BC)
00
(52)
80
(D0)
51
(1E)
D0
(20)
1C
(B8)
20
(28)
40
(55)
80
(40)
35
(C4)
00
(8E)
BC
(21)
0x03 88
(00)
21
(00)
00
(1E)
00
(01)
1E
(1D)
8C
(00)
0A
(72)
D0
(51)
8A
(D0)
20
(1E)
E0
(20)
2D
(6E)
10
(28)
10
(55)
3E
(00)
96
(C4)
0x04 00
(8E)
13
(21)
8E
(00)
21
(00)
00
(1E)
00
(01)
18
(1D)
02
(80)
3A
(D0)
80
(72)
18
(1C)
71
(16)
38
(20)
2D
(10)
40
(2C)
58
(25)
0x05 2C
(80)
45
(C4)
00
(8E)
06
(21)
44
(00)
21
(00)
00
(9E)
00
(8C)
1E
(0A)
01
(D0)
1D
(90)
80
(20)
18
(40)
71
(31)
1C
(20)
16
(0C)
0x06 20
(40)
58
(55)
2C
(00)
25
(C4)
00
(8E)
C4
(21)
8E
(00)
21
(00)
00
(18)
00
(4E)
9E
(1F)
4E
(00)
1F
(80)
00
(51)
80
(00)
51
(1E)
0x07 00
(30)
1E
(40)
30
(80)
40
(37)
80
(00)
37
(BC)
00
(88)
BC
(21)
88
(00)
21
(00)
00
(18)
00 18
(00)
00 00
ab
c
de
e
f
f
d
Product ID HEX EDID Table DDC Function
40450 0x9E02 029E Analog
40451 0x9E03 039E Digital
INPUT MODEL NAME(HEX)
HDMI1 67030C001000B82D
HDMI2 67030C002000B82D
HDMI3 67030C003000B82D
HDMI4 67030C004000B82D

- 14 - LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. 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.
• Must check the serial number at the Diagnostics of SET UP
menu. (Refer to below).
5.1. 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 : 20ms
5.2. 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
EEPROM,.
5.3. 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
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)

LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 15 -
1. TV/CATV doesn’t display
TROUBLESHOOTING
2. DTV doesn’t display
Check th e output data of IC104 in th e Jack
Board Pin52.
Can you see the normal sign al?
NO Could you measu re voltag e of IC104 in the
Jack Bo ard & IIC lin es?
Are they all normal?
NO You sh ou ld ch eck p ower lin e
& IIC li nes.
YES
You should rep lace Jack Bo ard.
YES
Check th e output of Main IC(IC100).
Especially you should ch eck
The H,V sync and c loc k.
Can you see the normal waveform?
YES
NO After ch eckin g the Power of Main IC(IC100) you
should decide to replace Main IC or not .
This bo ard has big problem becau se Main
IC(IC100) have some troubles.
After checking thoro ugh ly all pa th onc e again,
You sh ou ld decid e to rep lace Main Board or no t.
Check IC104.
Can you see the normal signal?
Check the output of TRQ105 in the Jack
Board.
Can you see the normal waveform?
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and cloc k.
Can you see the normal waveform?
YES
YES
NO Could you measu re voltag e of IC104 in the
Jack Bo ard & IIC lin es?
Are they all normal?
YES
NO You shou ld check power line
& IIC lines.
YES
You should replace Jack Board .
NO You sh ou ld decid e to rep lace
TR Q105 in the Jack Board or not.
NO After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not .
This bo ard has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You shou ld decide to replace Main Board or not.

LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 16 -
3. AV 1/2 doesn’t display
Check JK 200, JK201
Can you see the normal waveform?
NO JK200, JK201 may have problem. Rep lace th is
Jack.
Check th e output of Main IC(IC100).
Especially you should ch eck
The H,V sync and c loc k.
Can you see the normal waveform?
YES
NO After ch eckin g the Power of Main IC(IC100) you
should decide to replace Main IC or not .
This bo ard has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You sh ou ld decid e to rep lace Main Board or no t.
YES
4. Component doesn’t display
Check JK 304
Can you see the normal waveform?
Check th e input o f Compo nent Audio
switch (IC405 in th e Jack Bo ard ),
Can you see the normal waveform?
Check th e output of Component Audio
switch (IC405 in th e Jack Bo ard ) ,
Can you see the normal waveform?
YES
YES
YES
NO JK304
may have problem. Rep lace th is Jack.
NO After c hecking the Power of compone nt Audio
switch, y ou should decide to replace component
Audio s witch or not.
NO After c hecking the Power of compone nt Audio
switch y ou should decide to replace component
Audio s witch or not.
Check th e output of Main IC(IC100).
Especially you should ch eck
The H,V sync and c loc k.
Can you see the normal waveform?
YES
NO After ch eckin g the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This bo ard has big problem because Main
IC(IC100) have some troubles.
After checking thoro ugh ly all pa th onc e again,
You sh ou ld decid e to rep lace Main Board or no t.

LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 17 -
5. RGB PC doesn’t display
Check P300 ,
Can you see the normal waveform?
NO JP300
may have problem. Rep lace th is Jack.
Check th e inpu t o f RGB Audio
switch (IC405 in th e Jack Bo ard ) ,
Can you see the normal waveform?
Check th e output of RGB Audio
switch (IC405 in th e Jack Bo ard ) ,
Can you see the normal waveform?
YES
YES
NO After ch eckin g the Power of RGB Audio sw itc h,
you should decide to replace RGB Audio s witch
or not.
NO After ch eckin g the Power of RGB Audio sw itc h
you should decide to replace RGB Audio s witch
or not.
Check th e output of Main IC(IC100).
Especially you should ch eck
The H,V sync and c loc k.
Can you see the normal waveform?
YES
NO After ch eckin g the Power of Main IC(IC100) you
should decide to replace Main IC or not .
This bo ard has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You sh ou ld decid e to rep lace Main Board or no t.
YES

- 18 - LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
6. HDMI doesn’t display
Check input c onnect JK600, JK601, JK602,
JK603
Can you see the normal waveform?
Check DDC commu nication lin es(IC600,
IC601)
Check th e in pu t o f HDMI Switch (IC600)
This sign al is TMDS.
Can you see the normal waveform?
YES
YES
NO JK600, JK601, JK602, JK 603
may have problem. Rep lace th is Jack.
Check th e output of HDMI Switc h(IC600).
Can you see the normal waveform?
YES
YES
NO
After ch eckin g the trace o f TMDS lin es and power of
HDMI Switch, you should decide to replace HDMI
Switch or not .
NO
NO
After ch eckin g the Power of th is ch ip , you
should decide to replace this or not.
After ch eckin g the Power of HDMI Switch y ou
should decide to replace HDMI S witch or not.
YES
Check HDCP commu nicatio n lin es(IC601)
NO
After ch eckin g the Power of th is ch ip , you
should decide to replace this or not.
Check th e output of Main IC(IC100).
Especially you should ch eck
The H,V sync and c loc k.
Can you see the normal waveform?
YES
NO After ch eckin g the Power of Main IC(IC100) you
should decide to replace Main IC or not .
This bo ard has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You sh ou ld decid e to rep lace Main Board or no t.

LGE Internal Use OnlyCopyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 19 -
BLOCK DIAGRAM
RGB
COMPONENT
F-SCART
AV3
CLK,ERR,SYN,DATA[0]
CVBS, Y/C
DDR2 SDRAM
(256MB)
IC300
NAND Flash
HYNIX
IC402
URSA_C/D[10bit]
USB
Digital amp (NTP3100)
IC701
YPbPr
CVBS
CVBS
I2S
PC RGB, H/V SYNC
FHD 100Hz Panel
74LVC541A
Buffer
IC502
CI Slot
(P500)
74LCX244
Buffer
IC501
Address[0:7]
CVBS
URSA_A/B[10bit]
Host Address[0:7]
DDR2 Data[0:15]
DDR2 SDRAM
(128MB)
IC301
DDR2 Data[0:15]
DDR2 Address[0:12]
IC100
(LGE3369A)
FE_TS_DATA[0:7 ]
HDMI1 HDMI2 HDMI3 HDMI4
TDA9996
IC600
TMDS[0:7]
H-SCART
SCART-RGB
F-SCART L/R, H-SCART L/R AV L/R, COMP L/R
TUNER V_OUT
DTV/MNT_V_OUT
DDR2 Address[0:12]
Head
Phone
FRC
(LGE7329A)
IC900
DDR2 (128MB * 2)
IC1000/1001
<JACK BOARD >
RS-232C
MAX3232CDR
IC300
SPDIF SPDIF_OUT
L/R
PC L/R
L/R
L/R
CI_TS_DATA[0:7]
CI_DATA[0:7], Control,
Address[8:14]
EEPROM
AT24C512
TEA6420D
IC405
XC5000
IC102
DRX3913K
IC104
SIF
TPA6110A
IC700
SERIAL FLASH
IC103
LED A’ssy IR Assy
& RGB Sensor
Bluetooth
A’ssy
Local Key
MC74HC4006
IC702
DP, DM
DP, DM L (Audio)

- 20 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
300 200
400
530
540
820
550
830
570
A5
801
805
804
803
802
806
900
910
120
560
122
123
301
310
500
580
A10
A2
510
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE