LG 32LG500H User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LA66A
MODEL : 32LG500H 32LG500H-UA
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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CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ................................................................................. 3
SPECIFICATION....................................................................................... 6
ADJUSTMENT INSTRUCTION............................................................... 11
TROUBLE SHOOTING........................................................................... 18
BLOCK DIAGRAM.................................................................................. 23
EXPLODED VIEW .................................................................................. 27
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 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 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 500ºF to 600ºF.
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.
(500ºF to 600ºF)
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
(500ºF to 600ºF)
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(TV)
No Item Specification Remark
1 Receiving System VSB/64 & 256 QAM/ NTSC-M
2 Available Channel 1) VHF : 02~13
2) UHF : 14~69
3) DTV : 02-69
4) CATV : 01~135
5) CADTV : 01~135
3 Input Voltage 1) AC 100-240V~, 50/60Hz
4 Market NORTH AMERICA
5 Screen Size 32 inch Wide
6 Aspect Ratio 16:9
7 Tuning System FS
8 LCD Module LC320WXN-SBA1(vitiaz-4) LG Philips LCD
9 Operating Environment 1) Temp : 0 ~ 40 deg
2) Humidity : ~ 80 %
10 Storage Environment 1) Temp. : -20 ~ 50 deg
2) Humidity : 10 ~ 90 %
1. Application range
This spec. sheet is applied all of the 32”, 37”, 42” with LA66A
chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below
condition.
(1) Temperature : 20 ± 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 : UL, CSA, IEC Specification
EMC : FCC, ICES, IEC Specification

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5. Chroma & Brightness
No Item Min Typ Max Unit Remark
1 White brightness 400 500 cd/m2EZ Picture: Daylight,
Color Temperature: Medium
2 Color coordinate RED X 0.606 0.636 0.666 Full Signal Swing
(Default) Y 0.305 0.335 0.365 ± 0.03
GREEN X 0.260 0.290 0.320
Y 0.580 0.610 0.640
BLUE X 0.114 0.144 0.174
Y 0.033 0.063 0.093
WHITE X 0.249 0.279 0.309
Y 0.262 0.292 0.322
3 Brightness uniformity 80 % Full white
4 Contrast ratio 600:1 800:1 EZ Picture: Daylight,
2000:1 Color Temperature: Medium
(DCR)
5 Color Temperature Standard 10,000 11,000 12,000 ok
Cool 8,300 9,300 10,300 ok
Warm 5,500 6,500 7,500 ok
6. Component Video Input (Y, CB/PB, CR/PR)
No Resolution H-freq(kHz) V-freq.(kHz) Proposed
1 720*480 15.73 59.94 SDTV ,DVD 480I
2 720*480 15.73 60.00 SDTV ,DVD 480I
3 720*480 31.47 59.94 SDTV 480P
4 720*480 31.50 60.00 SDTV 480P
5 1280*720 44.96 59.94 HDTV 720P
6 1280*720 45.00 60.00 HDTV 720P
7 1920*1080 33.72 59.94 HDTV 1080I
8 1920*1080 33.75 60.00 HDTV 1080I

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7. RGB Input (PC/DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed
PC DDC
1 640*350 31.469 70.08 25.17 DOS X
2 640*480 31.469 59.94 25.17 VESA(VGA) O
3 640*480 37.861 72.80 31.50 VESA(VGA) O
4 640*480 37.500 75.00 31.50 VESA(VGA) O
5 800*600 35.156 56.25 36.00 VESA(SVGA) O
6 800*600 37.879 60.31 40.00 VESA(SVGA) O
7 800*600 48.077 72.18 50.00 VESA(SVGA) O
8 800*600 46.875 75.00 49.50 VESA(SVGA) O
9 1024*768 48.363 60.00 65.00 VESA(XGA) O
10 1024*768 56.476 70.06 75.00 VESA(XGA) O
11 1024*768 60.023 75.02 78.75 VESA(XGA) O
12 1280*768 47.700 60.000 80.140 VESA(WXGA)
1360*768 47.720 59.799 84.750 VESA(WXGA)
1366*768 47.130 59.658 72.000 VESA(WXGA)
DTV
1 720*480 31.50 59.94 SDTV 480P
2 720*480 31.47 60.00 SDTV 480P
3 1280*720 44.96 59.94 HDTV 720P
4 1280*720 45.00 60.00 HDTV 720P
5 1920*1080 33.72 59.94 HDTV 1080I
6 1920*1080 33.75 60.00 HDTV 1080I

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9. HDMI Input 2(DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed
1 720*480 31.500 59.94 27.00 SDTV 480P
2 720*480 31.469 60.00 27.03 SDTV 480P
3 1280*720 44.96 59.94 HDTV 720P
4 1280*720 45.00 60.00 HDTV 720P
5 1920*1080 33.72 59.94 HDTV 1080I
6 1920*1080 33.75 60.00 HDTV 1080I
8. HDMI Input 1(PC/DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed
PC DDC
1 640*480 31.469 59.94 25.17 VESA(VGA) O
2 640*480 37.861 72.80 31.50 VESA(VGA) O
3 640*480 37.500 75.00 31.50 VESA(VGA) O
4 800*600 35.156 56.25 36.00 VESA(SVGA) O
5 800*600 37.879 60.31 40.00 VESA(SVGA) O
6 800*600 48.077 72.18 50.00 VESA(SVGA) O
7 800*600 46.875 75.00 49.50 VESA(SVGA) O
8 1024*768 48.363 60.00 65.00 VESA(XGA) O
9 1024*768 56.476 70.06 75.00 VESA(XGA) O
10 1024*768 60.023 75.02 78.75 VESA(XGA) O
11 1280*768 47.700 60.00 80.140 VESA(WXGA) O
12 1360*768 47.720 59.799 84.750 VESA(WXGA) O
13 1366*768 47.130 59.658 72.000 VESA(WXGA) O
DTV
1 720*480 31.500 59.94 27.00 SDTV 480P
2 720*480 31.469 60.00 27.03 SDTV 480P
3 1280*720 44.96 59.94 HDTV 720P
4 1280*720 45.00 60.00 HDTV 720P
5 1920*1080 33.72 59.94 HDTV 1080I
6 1920*1080 33.75 60.00 HDTV 1080I

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10. General specifications (module) - LC320WXN-SAA1(32” vitiaz3 LPL)
No Item Value Unit Remark
1 Active Screen Size 31.51 inches mm
2 Outline Dimension 760(H) x 450(V) x 48(D) (Typ.) mm With inverter
3 Pixel Pitch 170.25(H) x 510.75(W) x RGB mm
4 Pixel Format 1366(H)x768(V) x RGB stripe arrangement
5 Color Depth 8bit, 16.7 M colors Mbit
6 Luminance ,White 500 (center 1 point) (Typ.) cd/m2
7 Viewing Angle (CR>10) Viewing angle free (R/L 178(Typ.),U/D 178(Typ.)) degree
8 Power Consumption Total 165 Watt(typ.)(Logoc=5.4W, Lamp=160W) Watt
9 Weight 5,700g(Typ) 6,000(Max) g
10 Display Operating Mode Transmissive mode ,normally black
11 Surface Treatment Hard coating (3H), anti-glare treatment of th fornt polarizer(Haze 13%)

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ADJUSTMENT INSTRUCTION
1. Application Range
This spec sheet is applied all of the 'LA66A' Chassis.
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,
60Hz.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
OAfter RGB Full White in HEAT-RUN Mode, the receiver
must be operated prior to the adjustment.
OEnter into HEAT-RUN MODE
1) Press the POWER ON KEY on R/C for adjustment.
2) OSD display and screen display 100% full WHITE
PATTERN.
- 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 screen 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. Method of PTC MICOM Download
3.1. Connection of MICOM JIG
(1) Connect port(3) with Power Code
(2) Connect jack(1) with PTC Micom.
(3) Connect USB Cable to the computer
(4) Download Program execution (SAP Configuration)
* Notice!
Because PTC Download JIG has internal memory, it can save
download files using download program (SAP Configuration).
Push the START button (4) after file saving, then it execute
download.
3.2. Execution of download program
(SAP Configuration)
(1) Execution of SAP Configuration
1) Select HCS12
2) Target Frequency Settings :
A. Checking the factor -> Use Specified Target
Frequency ..., Unsecure target...
B. Insert Target Bus Frequency -> 7372800
3) Specify Algorithm: 9S12dt128_128k .12P
4) Specify S Record: select download file.
5) Checking factor: Erase Device, Blank Check Device,
Program Device, Verify Device
* Notice!
Don't check other checking boxes. You must follow fig.
6) Push the 'Save Image to Cyclone PRO' button, files
transfer from PC to the Download JIG.
4. Start button
3. Power
1. Connect to Micom port of TV board. 2. Connect to computer.
<SAP Configuration>
1
2
3
5
6
4
PC -> Download Jig

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4. Select method of Module type
4.1. Setting up like figure
(Setting: Press ADJ Key in the Adjust remocon. Select
“System Control 3”by using D/E(CH+/-) key, and press
A(ENTER) Using Adjust remocon, select module)
5. Color Balance adjustment.
- System control RS-232 Host should be “PC”for adjustment.
5.1. Auto AV (CVBS) Color Balance
(1) Required Equipment
- Remote controller for adjustment
- AV Pattern Generator: 802F Pattern Generator, Master
(MSPG-925FS), etc
(Which has NTSC-J Composite Video format output with
standard (1.0 Vpp) See Fig. 1)
- It is very important to use correct adjustment pattern like
Fig.1.
(2) Method of Auto AV (CVBS) Color Balance
1) Input the NTSC-J Composite Video (Fig.1) into video
input.
=> MSPG-925FS Model No: 207 / Pattern No: 65 / NTSC-J
2) Set the EZ Picture to Daylight mode in Video menu.
3) Press INSTART key on R/C for adjustment.
4) Press the G(Vol. +) key operate to set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment.
* When adjust main picture, sub picture is included.
5.2. Auto Component Color Balance
(1) Required Test Equipment
- Remote controller for adjustment
- 802F Pattern Generator Which has 720p YPbPr output
with Standard (0.7Vpp) See Fig. 2
- It is very important to use correct adjustment pattern like
fig.2.
(2) Method of Auto Component Color Balance
1)Input the Component 1280*720p 60Hz signal into
Component.
=> MSPG-925FS Model No: 217 / Pattern No: 65
2) Set the EZ Pictures to Daylight mode in Video menu.
3) Press INSTART key on R/C for adjustment.
4) Press the G(Vol. +) key operate To set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment
- 12 -
<Fig.1> Auto AV (CVBS) Color Balance Test Pattern
Default Value on OSD
Before ADC Calibration, should be executed the "Module type
selection".
Auto Color Balance (Hex)
Auto-RGB GTo Set
Source Main
Red Offset1 102
Green Offset1 0C6
Blue Offset1 0DA
Red Offset2 3F
Green Offset2 3F
Blue Offset2 3F
Red Gain 072
Green Gain 070
Blue Gain 07B
Reset GTo Set
RF AV Component RGB
MSPG-925 Internal 2CH Model No. : 207 Model No. : 217 Model No. : 60
Pattern No. : 65 Pattern No. : 65 Pattern No. : 65
<Fig.2> Auto Component Color Balance Test Pattern

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5.3. Auto RGB Color Balance
(1) Required Test Equipment
- Remote controller for adjustment
- 802F Pattern Generator, Master (MSPG-925FS), etc.
(Which has XGA 60Hz PC Format output with standard
(0.7Vpp) See Fig. 3 )
- It is very important to use correct adjustment pattern like
Fig.3.
(2) Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz into RGB.
=> MSPG-925FS Model No: 60 / Pattern No: 65
2) Set the EZ Pictures to Daylight mode in Video menu.
3) Press INSTART key on R/C for adjustment.
4) Press the G(Vol. +) key operate To set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment.
5.4. RF Color Balance
1) Input the RF cable(2 ch)
2) Set the EZ Pictures to Daylight mode in Video menu.
3) Press INSTART key on R/C for adjustment.
4) Press the G(Vol. +) key operate To set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment
Default Value on OSD
Auto Color Balance (Hex)
Auto-RGB GTo Set
Source Main
Red Offset1 0F8
Green Offset1 0DA
Blue Offset1 0BC
Red Offset2 01
Green Offset2 01
Blue Offset2 01
Red Gain 1FE
Green Gain 1FE
Blue Gain 1FE
Reset GTo Set
<Fig.3> Auto RGB Color Balance Test Pattern
Default Value on OSD
Auto Color Balance (Hex)
Auto-RGB GTo Set
Source Main
Red Offset1 069
Green Offset1 0DA
Blue Offset1 0D0
Red Offset2 37
Green Offset2 39
Blue Offset2 3F
Red Gain 19F
Green Gain 183
Blue Gain 195
Reset GTo Set
Default Value on OSD
Auto Color Balance (Hex)
Auto-RGB GTo Set
Source Main
Red Offset1 032
Green Offset1 030
Blue Offset1 033
Red Offset2 40
Green Offset2 40
Blue Offset2 40
Red Gain 03C
Green Gain 03C
Blue Gain 01F
Reset GTo Set

- 14 -
6.EDID(The Extended Display
Identification Data) / DDC(Display
Data Channel) download
6.1. Required Test Equipment
1) Adjusting PC with S/W for writing EDID Data.
2) A Jig for EDID Download
3) Cable: Serial (9Pin or USB) to D-sub 15Pin cable, D-sub
15Pin cable, DVI to HDMI cable.
6.2. Setting of device
- When input HDMI EDID data through RGB or HDMI jack,
writing 8bits of the data at every turn with 'DDC2B' protocol.
6.3. Data of EDID
(1) DDC data of Analog-RGB
(2) DDC data of Digital-HDMI1
(3) DDC data of Digital-HDMI2
* Before adjustment of white balance, should be executed the
'color balance adjustment'
7. Adjustment of White Balance
7.1. Required Equipment
- Remote controller for adjustment
- Color Analyzer (CA-210 or same product )
- Auto W/B adjustment instrument(only for Auto adjustment)
- Use inner(SELF) Pattern
7.2. Adjustment of White Balance
(For Manual adjustment)
- Set TV input to RF.
- Operate the zero-calibration of the CA-210, Ch.9.
- Then stick sensor to LCD module surface when you adjust.
- For manual adjustment, it is also possible by the following
sequence.
1) Select white pattern of heat-run mode by pressing power
on key on remote control for adjustment then operate
heat run more than 15 minutes.
2) Enter the White Balance adjustment mode by pressing
the INSTART key twice (White Balance) on R/C.
3) Stick sensor to center of the screen and select each
items using D/E(CH +/-) key on R/C.
4) Adjust G Gain / B Gain using F/G(VOL +/-) key on R/C.
5) Adjust it until color coordination becomes as below.
- By controlling G, B GAIN, adjust X, Y target value.
- R Gain fixed at cool, normal, warm mode.
- But, Control the R GAIN, unless it has correct value
(Initially, R/G/B gain and R/G/B offset values are fixed as below.)
Red Gain: 80h Green Gain: 80h Blue Gain: 80h
Red Offset: 80h Green Offset: 80h Blue Offset: 80h
*Target value
6) When adjustment is completed, Exit adjustment mode
using EXIT key on R/C.
LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
<Fig.4> Connection Diagram of DDC download
X Y Temp (∆uv)
Cool 0.276 ± 0.002 0.283 ± 0.002 11000k (0.000)
Normal 0.285 ± 0.002 0.293 ± 0.002 9300k (0.000)
Warm 0.313 ± 0.002 0.329 ± 0.002 6500k (0.003)

- 15 -
8. Auto white Balance (AV)
* Input Select Data
AV(20), COMP1(40), COMP2(41), RGB_DTV(50),
RGB_PC(60), HDMI_DTV(90), HDMI_PC(A0)
* Command Set SET ID : 0-> total, 1~99 -> critical SET
LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
command command Set ID Data
1 2 MODE
Input Select x b 00 00h DTV-Air
01h Cable
10h RF-Air
11h Cable
20h AV1
21h AV2
40h COMPONENT
60h RGB-PC
90h HDMI1
91h HDMI2
Min Max INIT
R-Gain_Normal j a 00 00h 80h 80h
G-Gain_Normal j b 00 00h 80h 80h
B-Gain_Normal j c 00 00h 80h 80h
R-Gain_Warm j d 00 00h 80h 80h
G-Gain_Warm j e 00 00h 80h 80h
B-Gain_Warm j f 00 00h 80h 80h
R-Gain_Cool j g 00 00h 80h 80h
G-Gain_Cool j h 00 00h 80h 80h
B-Gain_Cool j i 00 00h 80h 80h
R-Offset_Normal l j 00 00h 80h
G-Offset_Normal l k 00 00h 80h
B-Offset_Normal l l 00 00h 80h
R-Offset_Warm l m 00 00h 80h
G-Offset_Warm l n 00 00h 80h
B-Offset_Warm l o 00 00h 80h
R-Offset_Cool l p 00 00h 80h
G-Offset_Cool l q 00 00h 80h
B-Offset_Cool l r 00 00h 80h
COLOR TEMP. k u 00 00h 03h(Cool, Normal,
Warm, User)
Inter Pattern w b 00 00 Start W/B adjustment
signal 10 Using inter Pattern
ff Finish W/B adjustment
Command Command Set ID Data Default value
1 2 Min Max
Input Select x b 01 20h 90h
R-Gain j a 01 0h FEh 77h
G-Gain j b 01 0h FEh 80h
B-Gain j c 01 0h FEh 7ch
R-Offset j d 01 0h FEh 7ch
G-Offset j e 01 0h FEh 80h
B-Offset j f 01 0h FEh 8ch
Adjustment CMD SET ID VAL Comment
POWER ON/ KA(ka) 0~99 0~1 0: OFF
OFF 1:ON
MAIN INPUT XB(xb) 0~99 20~A0 AV(20h), COMP(40h), RGB_DTV(50h),
RGB_PC(60h), HDMI1(90h), HDMI2(91h)
ARC KC(kc) 0~99 1~8 4:3, 16:9, SPECTACLE, ZOOM1, ZOOM2
SCREEN MUTE KD(kd) 0~99 0~1 0: MUTE, 1: MUTE OFF
AUDIO MUTE KE(ke) 0~99 0~1 0: MUTE, 1: MUTE OFF
VOLUME KF(kf) 0~99 0~64 0: 0 , 64 : 100 (hexadecimal)
CONTRAST KG(kg) 0~99 0~64 0: 0 , 64 : 100 (hexadecimal)
BRIGHTNESS KH(kh) 0~99 0~64 0: 0 , 64 : 100 (hexadecimal)
COLOR KI(ki) 0~99 0~64 0: 0 , 64 : 100 (hexadecimal)
TINT KJ(kj) 0~99 0~64 0: R50 , 64 : G50 (hexadecimal)
SHARPNESS KK(kk) 0~99 0~64 0: 0 , 64 : 100 (hexadecimal)
OSD ON/OFF KL(kl) 0~99 0~1 0: OFF, 1: ON
Remote Control KM(km) 0~99 0~1 0: LOCK
Key Lock 1: UNLOCK
BALANCE KT(kt) 0~99 0~64 0:L50, 64:R50
COLOR TEMP. KU(ku) 0~99 0~3 COOL,NORMAL,WARM,USER
RED LEVEL KV(kv) 0~99 0~50 0 : -40, 50 : 40 (hexadecimal)
GREEN LEVEL KW(kw) 0~99 0~50 0 : -40, 50 : 40 (hexadecimal)
BLUE LEVEL K$(k$) 0~99 0~50 0 : -40, 50 : 40 (hexadecimal)
ABNORMAL KZ(kz) 0~99 FF ACK
STATE 0 : Normal(Power on and signal exist)
1 : No signal (Power on)
2 : Turn the TV off by remote control
3 : Turn the TV off by sleep time function
4 : Turn the TV off by RS-232C function
5 : 5V down
6 : AC down
7 : Turn the TV off by Fan alarm function
8 : Turn the TV off by off time function
9 : Turn the TV off by auto off function
a : Turn the TV off by AV board detect

- 16 -
* AV INPUT MODE
* PC INPUT MODE
9. Test factor for commercial model
9.1. IR In/ Out Check
(1) Check Order 'Pass' Judgment
1) Insert RJ45 Cable, RS-232C Cable 2EA. Phone Jack to
each Port as below Picture.
2) Change the Mode 'PTC Only' On OSD(In-start -> Uart
Control -> Download -> PTC1)
3) Running the 'IR/MPI Check Program' on PC
4) Click the 'AUTO Run' or 'Push the Spacebar' on the
keyboard
5) If the Sign is 'NG' try One More as 'Push the Spacebar'
6) Confirm the 'OK' Sign on Screen that means IR in & MPI
Test Pass / 'NG' Sign is NG
Confirm the 'PASS' Sign of IR Out Check JIG / 'NG'
Sign is NG
7) After finish Check. Change the Mode 'D-Box On'(In-start
-> Uart Control -> D-Box 'ON')
(2) Needs JIG & Equip. & Cable
PC('MPI/IP In' Check Program. RS-232C 2Port), IR Out
Check Jig(With level Shifter), 232C to Phone jack Cable,
5V Adapter, 232C Cable(Cross) 232C Cable(Cross) 2EZ,
RJ45(Direct) Cable.
LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
WHITE BALANCE “J”(A~F)
Adjustment CMD SET ID VAL Comment
RED GAIN JA 0~99 0~FE 0:0, FE:FE , FF: Current state
GREEN GAIN JB 0~99 0~FE 0:0, FE:FE , FF: Current state
BLUE GAIN JC 0~99 0~FE 0:0, FE:FE , FF: Current state
RED OFFSET JD 0~99 0~FE 0:0, FE:FE , FF: Current state
GREEN OFFSET JE 0~99 0~FE 0:0, FE:FE , FF: Current state
BLUE OFFSET JF 0~99 0~FE 0:0, FE:FE , FF: Current state
ISM METHOD JP 0~99 0~3
Normal, White wash, Orbiter, Inversion
Orbit Time JR 0~99 1~FE 1: 0, FE:254, , FF: Current state
Orbit Pixel JS 0~99 1~3 1: 1pixel, 3: 3pixel, FF: Current state
AUTO CONFIG. JU 0~99 01 If it isn’t Auto Adjust Condition(),
send NACK
FACTORY IR
IR CODE MC 0~99 Over F0 IR CODE 0, BITMASK = 0X01
or 51
ADC Calriblation
Red,Blue,Green Ja,Jb, Directional Min:00 Initial value : red -0x79
Gain Jc : 00<E0 Max:fe blue -0x6f
green -0x80
Red,Blue,Green Jd,Je, 00<90 Min:00 Initial value : red -0x80
Offset Jf Max:fe blue -0x82
green -0x80
Item Min Typ Max Unit
Brightness uniformity 75 % Full white
Color Purity RED X 0.605 0.635 0.665 Full Signal Swing
Y 0.310 0.340 0.370
GREEN X 0.239 0.269 0.299
Y 0.576 0.606 0.636
BLUE X 0.117 0.147 0.177
Y 0.039 0.069 0.099
Color coordinate WHITE X 0.253 0.283 0.313
(Normal) Y 0.268 0.298 0.328
WHITE X 0.244 0.274 0.304
(COOL) Y 0.265 0.295 0.325
WHITE X 0.267 0.297 0.327
(WARM) Y 0.293 0.323 0.353
Item Min Typ Max Unit
Brightness uniformity 75 % Full white
Color Purity RED X 0.605 0.635 0.665 Full Signal Swing
Y 0.310 0.340 0.370
GREEN X 0.239 0.269 0.299
Y 0.576 0.606 0.636
BLUE X 0.117 0.147 0.177
Y 0.039 0.069 0.099
Color coordinate WHITE X 0.250 0.280 0.310
(Normal) Y 0.265 0.295 0.325
WHITE X 0.245 0.275 0.305
(COOL) Y 0.264 0.294 0.324
WHITE X 0.266 0.296 0.326
(WARM) Y 0.292 0.322 0.352

- 17 -
9.2. Lodgenet Card & Auto Camport Check
9.3. RJP(Remote Jack Pack) Check
(1) Check Order 'Pass' Judgment
1) Connecting RJP Test JIG & RJP Port of Set with Modem
Cable(8Pin)
2) Check the RJP operation on OSD(In-start -> RJP Pin
Check -> G
3) 'SUCCESS! PIN CONNECTION OK' -> PASS
4) 'Pin Check Fail!!!!' -> NG
5) If the Result is 'NG', try One More
(2) Needs JIG & Equip. & Cable
1) RJP Check JIG, Modem Cable (8 Pin)
9.4. MPI Card Check
10. Input the Shipping Option Data
1) Push the ADJ key in an Adjust Remote controller.
2) Input the Option Number that was specified in the BOM,
into the Shipping area.
3) The work is finished, Push AKey.
LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes - 18 -
TROUBLESHOOTING
CURRENT PROBE : P6022Aor same product
4.6 k‰ / 500 W
SC100
P203
P202
P401
400PF
3.15KV
400PF
3.15KV
P402
INPUT CONTROL SIGNALBURST DIMMING SIGNAL
INVERTER + POWER BOARD
VOLTAGE PROBE P6015A
or same product
VOLTAGE PROBE P6015A
or same product
INVERTER
CONNECTION
WIRE
INVERTER
TRANSFORMER
ON/OFF : 5V
SELECT
180Hz : 5V
150Hz : 0V
SYNC
180Hz, 3.3V, 50% Duty
150Hz, 3.3V, 50% Duty
INV_CTRL :5V
3.4V_ON : 5V
BURST_DIM
0-3.3V
A_DIM
0-1.65V
P201
AC INPUT
4.6 k‰ / 500 W
<Power board structure>

LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes - 19 -
1. No Power
(1) Symptom
1) Does not minute discharge at module.
2) Non does not come into the front LED.
(2) Procedure check
Is plug in power cord? Plug in power cord.
Yes
No
Is connect the Line Filter and
Power Board Cable? Connect Cable.
Yes
No
Is Normal the Fuse(F100) on
Power Board? Replace Fuse.
Yes
No
Is connect the Power Board and
13P cable of Main Board? Connect Cable.
Yes
No
After remove the cable connect to Power Board(except the SC100
connection cable), authorizes the AC Voltage marking on manual. When
ST-BY 5V does not operate, replace Power Board.

LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes - 20 -
Does minute discharge
At Module?
Is the LVDS
cable normal?
Is the IC1111 output
normal?
Check the LCD Module
Yes
No
YES
Yes
Reconnect the LVDS
cable in P600.
No
Is the IC506 (FLI8662)
Output normal? Replace the main
board
No
Yes
Is the LED change when
Push remote-control? Replace the IR board
No
NO Replace the
Power board.
Is output the normality
Low/High voltage except
stand-by 5V?
NO
2. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is Blue
(2) Procedure check
3. In case of occurring strange screen into specific mode
(1) Symptom
The screen does not become the display from specific input mode.
(RF, AV, Component, RGB, DVI).
(2) Check following
- Check the all input mode should become normality display .
- Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become normality display from the PIP mode or DW mode.
(Re-Check it Swap)
(3) In case of becomes unusual display from RF mode
Is normal the Tuner?
Is normal the
FIL8662?
Check the tuner cable.
* Isn’t cable has broken?
* Is the cable connected
well from MPI card to tuner?
Cable inserts well.
Yes
No
No
Replace Tuner
No
Is normal the Input voltage, IIC
Communication and CVBS output?
Yes
Is normal the Input voltage, IIC
Communication and HV sync?
No Replace IC or Main Board No