LG 32LG7000 User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LD88D
MODEL : 32LG7000 32LG7000-ZA
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION ........................................................................................6
ADJUSTMENT INSTRUCTION ...............................................................10
TROUBLE SHOOTING ...........................................................................14
BLOCK DIAGRAM...................................................................................23
EXPLODED VIEW .................................................................................. 33
SVC. SHEET ...............................................................................................

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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 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

Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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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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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently
prying up on the lead with the soldering iron tip as the solder
melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing the
IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete 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 © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This specification is applied to LD88D chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
(1) Temperature : 25 ± 5°C(77 ± 9°F), CST : 40 ± 5°C
(2) Humidity : 65% ± 10%
(3) Power : 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
No. Item Specification Remark
1 Display Screen Device 31.5 inch Color TFT-LCD Module(AUO) LCD
2 Aspect Ratio 16:9
3 LCD Module Pixel Format: 1920 horiz. By 1080 vert. pixels
RGB stripe arrangement
4 Operating Environment 1) Temp. : 0 ~ 40 deg
2) Humidity : 20 ~ 80% LGE SPEC
5 Storage Environment 3) Temp. : -20 ~ 60 deg
4) Humidity : 10 ~ 90 %
6 Input Voltage AC100-240V~, 50/60Hz Maker LG
3 General Specification(LCD Module)

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. Model Specification
No. Item Specification Remark
1 Market Austria, Belgium, Bulgaria, Croatia, Czech, Denmark, Finland, 25 Country -> 27 country
France, Germany, Greece, Hungary, Italy, Luxembourg, UK
Morocco, Netherlands, Norway, Poland, Portugal, Romania,
Russia, Serbia,Slovenia, Spain, Sweden, Switzerland, Turkey,
2 Broadcasting system 1) PAL/SECAM BG EU (PAL Market)
2) PAL/SECAM DK
3) PAL I/II
4) SECAM L/L’
5) DVB T
3 Receiving system Analog : Upper Heterodyne
Digital : COFDM
4 Scart Jack (2EA) PAL, SECAM Scart 1 Jack is Full scart and support
RF-OUT(Analog)
Scart 2 jack is Half scart and support
MNT-OUT.
5 Video Input (1EA) PAL, SECAM, NTSC Side AV
6 S-Video Input (1EA) PAL, SECAM, NTSC Side AV
7 Component Input (1EA) Y/Cb/Cr, Y/ Pb/Pr
8 RGB Input RGB-PC Analog (D-Sub 15Pin)
9 HDMI Input (4EA) HDMI-PC HDMI1/DVI, HDMI2, HDMI3, HDMI4
HDMI-DTV All HDMI inputs support V1.3 of HDMI
10 Audio Input (3 EA) RGB/DVI Audio, Component, AV L/R Input
11 SPDIF Out(1 EA) SPDIF Out
12 USB For SVC, S/W Download, X-Studio Side(X-Studio Only Series)
13 Bluetooth Bluetooth Phone(JPEG), Headset 32/37/42/47/52LG7000 models

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed
1 720*480 15.73 59.94 13.500 SDTV, DVD 480I(525I)
2 720*480 15.75 60.00 13.514 SDTV, DVD 480I(525I)
3 720*576 15.625 50.00 13.500 SDTV, DVD 576I(625I) 50Hz
4 720*480 31.47 59.94 27.000 SDTV 480P
5 720*480 31.50 60.00 27.027 SDTV 480P
6 720*576 31.25 50.00 27.000 SDTV 576P 50Hz
7 1280*720 44.96 59.94 74.176 HDTV 720P
8 1280*720 45.00 60.00 74.250 HDTV 720P
9 1280*720 37.50 50.00 74.25 HDTV 720P 50Hz
10 1920*1080 33.72 59.94 74.176 HDTV 1080I
11 1920*1080 33.75 60.00 74.250 HDTV 1080I
12 1920*1080 28.125 50.00 74.250 HDTV 1080I 50Hz,
13 1920*1080 56.25 50 HDTV 1080P
14 1920*1080 67.5 60 HDTV 1080P
5. Component Video Input (Y, PB, PR)
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed Remark
1. 720*400 31.468 70.08 28.32
2. 640*480 31.469 59.94 25.17 VESA
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 80.125 VESA(WXGA)
6 1360*768 47.72 59.80 84.625 VESA(WXGA)
7 1280*1024 63.98 60.02 108. SXGA FULL HD only
8 1400*1050 65.317 59.979 121.75 SXGA FULL HD only
9. 1920*1080 66.587 59.934 138.5 WUXGA
6. RGB input (Analog PC)

Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed Remark
1. 720*400 31.468 70.08 28.32
2. 640*480 31.469 59.94 25.17 VESA
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 80.125 VESA(WXGA)
6 1360*768 47.72 59.80 84.625 VESA(WXGA)
7 1280*1024 63.98 60.02 108. SXGA FULL HD only
8 1400*1050 65.317 59.979 121.75 SXGA FULL HD only
9. 1920*1080 66.587 59.934 138.5 WUXGA
7. HDMI DTV
8. HDMI PC
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed
1 640*480 31.649 59.94 25.175 SDTV 480p 60Hz
2 640*480 31.469 60 25.20 SDTV 480p 60Hz
3 720*480 31.47 59.94 27.00 SDTV 480p 60Hz
4 720*480 31.50 60 27.027 SDTV 480p 60Hz
5 720*576 31.25 50.00 27.00 SDTV 576p 50Hz
6 1280*720 37.50 50.00 74.176 HDTV 720p 50Hz
7 1280*720 44.96 59.94 74.176 HDTV 720p 60Hz
8 1280*720 45.00 60 74.250 HDTV 720p 60Hz
9 1920*1080 28.125 50.00 74.250 HDTV 1080i 50Hz
10 1920*1080 33.72 59.94 74.176 HDTV 1080i 60Hz
11 1920*1080 33.75 60 74.250 HDTV 1080i 60Hz
12 1920*1080 27.00 24.00 74.25 HDTV 1080p 24Hz
13 1920*1080 33.750 30 74.25 HDTV 1080p 30Hz
14 1920*1080 56.25 50.00 148.50 HDTV 1080p 50Hz
15 1920*1080 67.433 59.94 148.352 HDTV 1080p 60Hz
16 1920*1080 67.50 60 148.50 HDTV 1080p 60Hz

Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LD88D chassis
manufactured at LG TV Plant all over the world.
2. Specification.
(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.
(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 100-240V,
50/60Hz.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
- After RGB Full White in HEAT-RUN Mode, the receiver
must be operated prior to the adjustment.
- Enter into HEAT-RUN MODE
1) Press the “POWER ON” KEY on Adjustment R/C.
2) Press the “ADJ KEY” on Adjustment R/C.
3) Select “3. Test Pattern” by using D/E(CH +/-) and
press ENTER(A)
4) Select “White” by using F/G(VOL +/-) and press
ENTER(A)
* Set is activated HEAT run without signal generator in this
mode.
* Single color pattern ( RED / BLUE / GREEN ) of HEAT
RUN MODE uses to check panel.
* Caution : If you turn on a still pattern more than 20
minutes (Especially digital pattern, cross hatch pattern),
an after image may be occur in the black level part of the
screen.
3. PCB assembly adjustment method
Caution: Using ‘power on’ button of the Adjustment R/C ,
power on TV.
* ADC Calibration Protocol (RS232)
* EDID data and Model option download (RS232)
** Note 1 & Note 2
- Baud rate : 115200 bps
- RS232 Host : PC
- echo : none
3.1. ADC adjustment
* Adjustment can be done using only internal ADC, so input
signal is not necessary.
* Required equipment : Adjustment R/C.
1) Press ADJ key on adjustment R/C.
2) Select “1. ADC calibration” by using D/E(CH +/-) and press
ENTER(A)
3) Select “Start” by using F/G(VOL +/-) and press ENTER(A)
4) ADC adjustment is executed automatically.
3.2 PCMCIA CARD Checking Method
You must adjust DTV 29 Channel and insert PCMCIA CARD
to socket.
1) If PCMCIA CARD works normally, normal signals display
on screen. But it works abnormally, “No CA module” words
display on screen.
* Caution: Set up “RF mode” before launching products.
Item CMD1 CMD2 Data0
Enter Adjust ‘Mode In’ A D 0 0 When transfer the ‘Mode In’,
Adjust Mode Carry the command.
ADC adjust ADC Adjust A D 1 0 Automatically adjustment
(The use of a internal pattern)
Adjust ‘Mode Out’ A D 9 0
Adjustment A D 9 9 To check ADC Adjustment
Confirmation on Assembly line.
RF input AV / Component / RGB input
NO SIGNAL or White noise NO SIGNAL
NO Item CMD1 CMD2 Data0
Enter Download A E 0 0 When transfer the ‘Mode
download ‘Mode In’ In’, Carry the command.
MODE
Edid data and Download A E *Note1 *Note2 Automatically download
Model option (The use of a internal Data)
download
Adjust ‘Mode Out’ A E 9 0
Adjustment A E 9 9 To check download
Confirmation on assembly line
Model Option Note 1 Note 2
32LG7000-ZA 5 6
37LG7000-ZA 5 7
42LG7000-ZA 5 8
47LG7000-ZA 5 9
52LG7000-ZA 5 A

4. EDID (The Extended Display Identification DATA)
* When company internal production(total assembly), EDID
data must scan in DDC line.
4.1. EDID Download
Before downloading EDID Data, check the RGB/HDMI cable
is disconnected.
1) Press ADJ key on Adjustment R/C.
2) Select “5.EDID D/L” by using D/E(CH +/-) and press
ENTER(A)
3) Select “Start” by using F/G(VOL +/-) and press ENTER(A)
4) EDID DownLoad is executed if word “NG” is changed to
“OK” about all HDMI ports.
4.2. EDID Data
(1) HDMI1
ⓐ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.
ⓕPort No.
10:HDMI1, 20:HDMI2, 30:HDMI3, 40:HDMI4
(2) RGB
ⓐ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
- 11 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
0x00 0x01 0x02 0x030x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D ⓐⓑ
0x10 ⓒ01 03 80 46 27 78 EA D9 B0 A3 57 49 9C 25
0x20 11 49 4B A1 08 00 31 40 45 40 61 40 81 80 90 40
0x30 D1 C0 01 01 01 01 1A 36 80 A0 70 38 1F 40 30 20
0x40 35 00 E8 26 32 00 00 1A 1B 21 50 A0 51 00 1E 30
0x50 48 88 35 00 BC 86 21 00 00 1C 00 00 00 FD 00 39
0x60 4B 1F 54 12 00 0A 20 20 20 20 20 20
0x70 ⓓ01 ⓔ
0x80 02 03 23 F1 4E 81 02 03 15 12 13 04 14 05 20 21
0x90 22 1F 10 23 09 57 07 83 01 00 00 67 03 0C 00 ⓕ
0xA0 00 B8 2D 01 1D 00 80 51 D0 1C 20 40 80 35 00 BC
0xB0 88 21 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96
0xC0 00 13 8E 21 00 00 18 02 3A 80 18 71 38 2D 40 58
0xD0 2C 45 00 06 44 21 00 00 1E 01 1D 80 18 71 1C 16
0xE0 20 58 2C 25 00 C4 8E 21 00 00 9E 4E 1F 00 80 51
0xF0 00 1E 30 40 80 37 00 BC 88 21 00 00 18 00 00 ⓔ
MODEL NAME PRODUCT ID HEX EDID Table
32LG7000 30302 765E 5E76
37LG7000 30264 7638 3876
42LG7000 40360 9DA8 A89D
47LG7000 40362 9DAA AA9D
52LG7000 50202 C41A 1AC4
MODEL NAME MODEL NAME(HEX)
32LG7000 00 00 00 FC 00 33 32 4C 47 37 30 30 30 0A 20 20 20 20
37LG7000 00 00 00 FC 00 33 37 4C 47 37 30 30 30 0A 20 20 20 20
42LG7000 00 00 00 FC 00 34 32 4C 47 37 30 30 30 0A 20 20 20 20
47LG7000 00 00 00 FC 00 34 37 4C 47 37 30 30 30 0A 20 20 20 20
52LG7000 00 00 00 FC 00 35 32 4C 47 37 30 30 30 0A 20 20 20 20
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D ⓐⓑ
0x01 ⓒ01 03 01 46 27 78 EA D9 B0 A3 57 49 9C 25
0x02 11 49 4B A1 08 00 31 40 45 40 61 40 D1 C0 90 40
0x03 81 80 01 01 01 01 1A 36 80 A0 70 38 1F 40 30 20
0x04 35 00 E8 26 32 00 00 1A 1B 21 50 A0 51 00 1E 30
0x05 48 88 35 00 BC 86 21 00 00 1C 00 00 00 FD 00 39
0x06 4B 1F 54 12 00 0A 20 20 20 20 20 20
0x07 ⓓ00 ⓔ
MODEL NAME PRODUCT ID HEX EDID Table
32LG7000 30301 765D 5D76
37LG7000 30263 7637 3776
42LG7000 40359 9DA7 A79D
47LG7000 40361 9DA9 A99D
52LG7000 50201 C419 19C4
MODEL NAME MODEL NAME(HEX)
32LG7000 00 00 FC 00 33 32 4C 47 37 30 30 30 2D 0A 20 20 20 20
37LG7000 00 00 FC 00 33 37 4C 47 37 30 30 30 2D 0A 20 20 20 20
42LG7000 00 00 FC 00 34 32 4C 47 37 30 30 30 2D 0A 20 20 20 20
47LG7000 00 00 FC 00 34 37 4C 47 37 30 30 30 2D 0A 20 20 20 20
52LG7000 00 00 00 FC 00 35 32 4C 47 37 30 30 30 0A 20 20 20 20

Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
- 12 -
5. Model option download(Manual method)
(1) Press ‘Adj’ key of Adjust Remocon ( p/n : 105-201M).
(2) Select ‘Model Option’ by using D/E(CH+/-) key, and press
‘VOL+’ of ‘Enter’.
(3) Enter the Model number or Select ‘Model Name’ by using
D/E(CH+/-) key.
32LG7000-ZA -> 7700000
(4) And then, Press ‘Enter’ or ‘Vol+’
(5) The set is turned off and Turned On automatically.
6. Serial number D/L
6.1 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
6.2 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,.
6.3 method & notice
A. Serial number D/L is using of scan equipment.
B. Setting of scan equipment operated by Manufacturing
Technology Group.
C. 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
7. Adjustment of White Balance
7.1. Test Equipment
- Color Analyzer (CS-1000, CA-100+(CH.9), CA-210(CH.9) )
- Please adjust CA-100+ / CA-210 by CS-1000 before
measuring
-> You should use Channel 9 which is Matrix compensated
(White, Red, Green, Blue revised) by CS-1000 and adjust
in accordance with White balance adjustment coordinate.
* Color temperature standards according to CSM and Module
* Change target luminance and range of the Auto adjustment
W/B equipment.
* White balance adjustment coordinate and color temperature
- PC (for communication through RS-232C) -> UART Baud
rate : 115200 bps
- Luminance Y AV : upper 150 cd/m2(TYP : 350 cd/m2)
-> Applying to Cool, Medium, Warm mode
7.2. 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 IN-START -> Enter
the mode of White-Balance, the pattern will come out.
CSM LCD
Cool 11000K
Medium 9300K
Warm 6500K
Target luminance 65
Gamma 20
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)
Cool CS-1000 CA-100+(CH.9) CA-210(CH.9)
X 0.276 0.276±0.002 0.276±0.002
Y 0.283 0.283±0.002 0.283±0.002
∆uv 0.000 0.000 0.000
Medium CS-1000 CA-100+(CH.9) CA-210(CH 9)
X 0.285 0.285±0.002 0.285±0.002
Y 0.293 0.293±0.002 0.293±0.002
∆uv 0.000 0.000 0.000
Warm CS-1000 CA-100+(CH.9) CA-210(CH 9)
X 0.313 0.313±0.002 0.313±0.002
Y 0.329 0.329±0.002 0.329±0.002
∆uv 0.000 0.000 0.000
<Fig. 1> connecting picture (On Automatic Control)

7.3. Auto White Balance
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 15 minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others, check
the back light on.
- Auto adjustment Map(RS-232C)
7.4. Manual white Balance
(1) Press the ADJ KEY on Adjustment R/C.
Select “3. Test Pattern” by using D/E(CH +/-) and press
ENTER(A)
Select “White” by using F/G(VOL +/-) and press
ENTER(A) and heat run over 15 minutes.
(2) Zero Calibrate CA-100+ / CA-210, and when controlling,
stick the sensor to the center of LCD module surface.
(3) Press the ADJ KEY on Adjustment R/C
(4) Select “2. White Balance” and press G(VOL +)
Set test-pattern on and display inside pattern.
(5) Control is carried out on three color temperatures, COOL,
MEDIUM, WARM.
(Control is carried out three times)
< Temperature: COOL >
- R-Cut / G-Cut / B-Cut is set to 64.
- Gain of Fixed color should be kept on 192, and
adjust other two lower than 192.
- Each gain is limited to 192.
< Temperature: MEDIUM >
- R-Cut / G-Cut / B-Cut is set to 64.
- Gain of Fixed color should be kept on 192, and
adjust other two lower than 192.
- Each gain is limited to 192.
< Temperature: WARM >
- R-Cut / G-Cut / B-Cut is set to 64.
- Gain of Fixed color should be kept on 192, and
adjust other two lower than 192.
- Each gain is limited to 192.
* One of R Gain / G Gain / B Gain should be kept on
192, and adjust other two lower than 192.
(When R/G/B GAIN are all 192, it is the FULL
DYNAMIC Range of Module)
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
- 13 -
RS-232C COMMAND MIN CENTER Max
[CMD ID DATA] (DEFAULT)
Cool Medium Warm Cool Medium Warm
R Gain jg Ja jd 00 192 192 192 255
G Gain jh Jb je 00 192 192 192 255
B Gain ji Jc jf 00 192 192 192 255
R Cut 64 64 64 128
G Cut 64 64 64 128
B Cut 64 64 64 128

Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
- 14 -
TROUBLE SHOOTING
1. Power Board
1-1. The whole flow chart which it follows in voltage output state
Does not screen
whole comes out?
Yes
No
Yes
Start check
1. Check the Power off condition.
Is it identical with
power off condition?
Is the interface
signal operated?
Yes
2. Check the interface signal condition.
Yes
3. Check the St_by 5V
signal circuit.
Yes
4. Check the AC detect
signal circuit.
Yes
No
5. Check the VSC RL_ON
/PWR_ON/OFF signal.
No
No
No
Does not
low voltage output
comes out?
Yes Does not the
St-by 5V(P-5V) signal
comes out?
Does not the
AC Detect signal
comes out?
No Does not the
RL_ON/PWR_ON/OFF
comes out?
No
Yes
7. Check the VSC INV_CTL signal?
Yes
8. Check the INV 24V
voltage output circuit.
Manufacture enterprise
meaning of a passage.
Yes
6. Check the VSC low
Voltage output.
Does not
inverter signal output
comes out?
Yes Does not the
VSC signal INV_CTL
comes out?
Does not the
INV 24V voltage output
comes out?
No Does not the
VSC Low voltage output
comes out?

- 15 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1-2. In case of No Power
(1) Symptom
1) It does not charge at module.
2) Front LED does not work.
(2) Check the followings
A power cord is plugged in with TV set? Plug the power cord in.
Is AC-INLET Cable(Red+Blue) connected with th PSU? Connect the AC-INLET Cable.
Yes
No
No
Are the fuses OK on the PSU?
(check open or short status with Multi-meter) Replace the fuse.
Yes
No
Is the PSU connected with Main Board though a 24pin cable? Connect a 24p cable to PSU to Main(P1000)pin.
Yes
Measure output voltages(16V, 12V, 5V) on the PSU.
-> [Main P1000] pin1,2:16V; pin(5,6):12V; pin(9~12):5V;
If the measured values are not a proper value, replace PSU.
Yes
No

- 16 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
NG : always RED No problem
Check LED A’ssy color.
Check remote control
Power key off.
Replace LED A’ssy.
Check P500 VDD voltage
(pin1~4) 12V
No problem
No problem
No problem
Check LVDS data
signal(pin11~22, pin27~38)
No problem
Replace T-con board of
LCD Module.
No problem
Replace IC100. Replace regulator.
No problem
Lamp On status
Lamp off
Check inverter lamp
On/Of status.
Check LVDS Cable. Replace the LVDS Cable.
NG
NG
NG
Check Q501, L502,500,
PANEL_Vcc_EN signal.
NG
Recheck PSU(+5V, +12V, +16V)
-> If not OK then replace PSU Replace PSU
Check the PWM signal
(P1000, pin 22, 21) Replace the Main B/D.
NG
Re App S/W download.
If not OK then replace IC100.
Check IC502 power block
L1200(1.0V), L1213(1.8V)
IC1204(3.3V), IC1205(3.3V)
IC1206(1.2V)
No problem
Check LED A’ssy. Replace PSU B/D or Main B/D.
Is the inverter OK?
(INV_CTL signal :
P1000 :pin20)
Re MICOM S/W download
-> If not OK then replace
IC802
No problem
No
problem
NG
NG
NG
2. Main Board & Sub FRC B/D
2-1. In case of No Raster

- 17 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check Tuner
1. VDD Check -> TU300 pin22:1.8V
pin21: 3.3V
pin4:5V
2. IIC check -> pin10,11
Check ATV signal
1. Video signal
-> TU Main Signal : R336
-> Tuner V-out:C318
Replace TU300.
Check Front END IC100
1. Check C518
Check DTV signal
1. TP signal -> Pin 24~34
2. IIC check -> pin 18,19
Replace TU300.
NG : DTV
Check ATV sound signal
1. Sound signal
-> SIF : R317
-> SECAM-L sound:R326
NG : DTV
Check sound processor
1. IC603 pin50 for SIF(RF sound)
2. IC603 pin47 for SECAM-L sound
Check App S/W.
If App S/W OK then replace IC603.
Check Digital AMP
1. VDD 16V:IC600 pin49~52, 32~35
VDD 1.8V:IC600 pin2, 13, 16
2. Mute check:IC600 pin25
No problem
NG
No
problem
No problem
No problem
Check App S/W
If App S/W OK then replace IC600.
NG
NG : DTV NG
NG
Replace Main B/D.
NG
Check App S/W.
If App S/W OK then
replace IC100.
2-2. In case of abnormal display or sound when RF mode
Replace TU300.
NG
NG
Check App S/W.
If App S/W OK then replace Main B/D.

- 18 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check video signal
1. Red : JK100 pin15 and C508
2. Green : JK100 pin11 and C511
3. Blue : JK100 pin7 and C514
4. CVBS : JK100 pin20 and C1909
Check AV1 Jack
1. SCART1 LINK check
->R148 or JK100 pin17
Check Video, Audio
Check Audio signal
1. R : JK100 pin2 and C679
2. L : JK100 pin6 and C692
Audio NG
Check App S/W.
If App S/W OK then replace IC603.
No problem
Check the input source of Equipment.
NG
Check App S/W.
If App S/W OK then replace IC600.
Check App S/W.
If App S/W OK then replace Main B/D.
NG
Check Digital AMP
1. VDD 16V : IC600 pin49~52, 32~35
VDD 1.8V : IC600 pin12,13,16
2. Mute check : IC600 pin25
No problem
Video NG
Replace IC100.
No problem
No problem
2-3. In case of abnormal display or sound when side AV1(SCART1) mode
Check video signal
1. CVBS : JK101 pin20 and C519
Check AV2 Jack
1. SCART1 LINK check
->R149 or JK101 pin17
Check Video, Audio
Check Audio signal
1. R : JK101 pin2 and C690
2. L : JK101 pin6 and C627
Audio NG
Check App S/W.
If App S/W OK then replace IC603.
No problem
Check the input source of Equipment.
NG
Check App S/W.
If App S/W OK then replace IC600.
Check App S/W.
If App S/W OK then replace Main B/D.
NG
Check Digital AMP
1. VDD 16V : IC600 pin49~52, 32~35
VDD 1.8V : IC600 pin12,13,16
2. Mute check : IC600 pin25
No problem
Video NG Check App S/W.
If App S/W OK then
Replace IC100.
No problem
No problem
2-4. In case of abnormal display or sound when side AV2(SCART2) mode

- 19 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check EDID EEPROM
1. IC102 VDD Check
-> pin8 : 5V
2. DDC IIC line check
-> IC102 pin 6, 5
Check RGB Jack
1. RGB LINK check
->R189 or P101 pin10
Check Video, Audio
Check sink signal
1. H-sync : P101 pin13
2. V-sync : P101 pin14
No problem : case 1
No problem: case 2
Check App S/W
If App S/W OK then replace IC102.
NG
NG
Check App S/W.
If App S/W OK then replace IC100.
Check Video & sink signal
1. Red : P101 pin1 and C501
2. Green : P101 pin2 and C502
3. Blue : P101 pin3 and C503
NG
Check App S/W.
If App S/W OK then replace IC100.
NG
Check 74HC14D IC103
1. H-sync : pin4
2. V-sync : pin8
3. If problem with IC103 then replace IC103
No problem
or No sound Check EDID
1. Read EDID data
EDID download
and recheck
No problem
No problem
2-5. In case of abnormal display or sound when VGA Input mode
Check video signal
1. Y : JK102 pin3A and C509
2. Pb : JK102 pin5B and C512
3. Pr : JK102 pin5C and C515
Check Component Jack.
1. COMP LINK check
->R167 or JK102 pinA4
Check Video, Audio
Check Audio signal
1. R : JK102 pin3E and C614
2. L : JK102 pin5D and C613
Audio NG
Check App S/W.
If App S/W OK then replace IC100.
No problem
Check the input source of Equipment.
NG
NG
Video NG Check App S/W.
If App S/W OK then
Replace IC100.
No problem
2-6. In case of abnormal display or sound when Component Input mode

- 20 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check video signal
1. CVBS : JK103 pin2 and C517
Check AV3 Jack.
1. AV3 LINK check
->R187 or JK103 pin3
Check Video, Audio
Check Audio signal
1. R : JK103 pin7 and C616
2. L : JK102 pin8 and C615
Audio NG
Check App S/W.
If App S/W OK then replace IC100.
No problem
Check the input source of Equipment.
NG
NG
Video NG Check App S/W.
If App S/W OK then
replace IC100.
No problem
2-7. In case of abnormal display or sound when side AV3 mode
Check EDID.
1. Read EDID data.
Check EDID EEPROM
1. IC201~4 VDD Check
-> pin8:5V
2. DDC IIC lin check
-> IC201~4 pin6,5
Check HDMI HPD Output
1. HDMI JK201, 202, 203 Pin19
Check TMDS signal.
1. JK201~3, JK204 pin1~12
Check App S/W.
If App S/W OK then replace IC100.
No problem
Check App S/W.
If App S/W OK then replace IC201~4.
NG
Check HDMI 5V_DET input
1. HDMI JK201, 202, 203 Pin20
Check HDMI source.
If OK then replace HDMI JACK.
No problem
Check App S/W.
If App S/W OK then replace IC100.
No problem
No problem
or No sound
Check TMDS 351 IC(IC200).
1. VDD check -> pin6,12,19,25,40,46,55,61:3.3V
2. HDMI SEL check -> pin33,32
No problem : case HDMI1~3
Check TMDS351 TMDS signal check.
1. Pin17~27
No problem
Check App S/W.
If App S/W OK then replace IC100.
No problem
NG
No problem
case HDMI4
Video NG
Check App S/W.
If App S/W OK then replace IC200.
NG
EDID download
and re-check
All data:FF
2-8. In case of abnormal display or sound when HDMI1,2,3,4 mode