LG 42LB9RT User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LP7BB
MODEL : 42LB9RT 42LB9RT-MD
website:http://biz.LGservice.com
Internal Use Only

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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ..........................................................................3
SPECIFICATION ........................................................................................6
ADJUSTMENT INSTRUCTION ...............................................................10
TROUBLE SHOOTING ............................................................................14
BLOCK DIAGRAM...................................................................................25
EXPLODED VIEW .................................................................................. 26
EXPLODED VIEW PARTS LIST..............................................................27
REPLACEMENT PARTS LIST ............................................................... 28
SVC. SHEET ...............................................................................................

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Copyright © 2007 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 Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩand 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
Replaceable batteries
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
CAUTION
RISK OF EXPLOSION IF BATTERY
IS REPLACED BY AN INCORRECT
TYPE. DISPOSE OF USED
BATTERIES ACCORDING TO THE
INSTRUCTIONS
ADVARSEL
Lithiumbatteri - Eksplosionsfare ved
fejlagtig hándtening. Udskiftning má
kun ske med batteri at samme
fabrikat og type. Levér det brugte
batteri tilbage til leverandoren

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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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 © 2007 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.

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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Application range
This spec sheet is applied to the LCD TV used LP7BB
chassis
2. Specification
Each part is tested as below without special appointment.
(1) Temperature : 25 ± 5°C(77 ± 9°F), CST : 40 ± 5°C
(2) Relative Humidity : 65% ± 10%
(3) Power Voltage : Standard input voltage (100-240V~,
50/60Hz)
*Standard Voltage of each products is marked by models
(4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(5) The receiver must be operated for about 20 minutes prior
to the adjustment.
3. Test method
(1) Performance : LGE TV test method followed
(2) Demanded other specification
Safety : CE, IEC Specification
EMC : CE, IEC
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
4. General TV Specification
No Item Specification Remark
1. Video input applicable system NTSC-M, PAL M/N
2. Receivable Broadcasting System 1) NTSC
2) PAL M
3) PAL N
3. RF Input Channel BAND NTSC
VHF 2 ~ 13
UHF 14 ~ 69
CATV 1 ~ 125
4. Input Voltage 100-240V~ / 50Hz, 60Hz
5. Market Central & South America
6. Operating Environment 1) Temp : 0 ~ 40 deg
2) Humidity : 10 ~ 90 %RH
7. Storage Environment 1) Temp : -20 ~ 50 deg
2) Humidity : 10 ~ 90 %RH
8. Power Consumption Power on ≤260(42”)
(Green) ≤220(32”)
9. Stand by Cool ≤1W(32”, 42”)
Warm ≤40W(32”, 42”) When recordign the manual recording
10. Frequency range H : 31 ~ 61 khz PC Input
V : 56 ~ 75 Hz
11. Video Input (2EA) NTSC, PAL M/N
12. S-Video Input (1EA) NTSC, PAL M/N Side only
13. Component Input (2EA) Y/Cb/Cr, Y/Pb/Pr
14. RGB Input (1EA) RGB-PC
15. HDMI Input (2EA) HDMI-PC
HDMI-DTV
16. Audio Input (5EA) PC Audio, Component (2EA), AV(2EA) L/R Input
17. Audio variable out (1EA)
18. USB Input (1EA) DivX, MP3, JPEG
19. AV out (1EA)

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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5. General Module Specification
No Item Specification Remark
1 . Panel 42" TFT WXGA LCD
32" TFT WXGA LCD
2. LCD Module Outline 42" 983 x 576 x 47.3 (H)mm x (V)mm x (D)mm
Dimension 32" 760.0 x 450.0 x 48.0
Pixel Pitch 42" 0.227 x 0.681 x RGB mm
32" 0.17025 x 0.51075 x RGB
Pixel Format 1366 x 768 Pixels RGB strip arrangement
Coating Hard coating(3H), Anti-glare treatment
of the front polarizer,
Back Light 42" 18CCFL
32" 18CCFL
6. Set Optical Feature (LCD Module)
No Item Min Typ Max Unit Maker Remark
1. Luminance 400 500 LPL(0RT) - 50cm from the surface
32",42" - Full White Pattern
2. View angle (R/L, U/D) 178/178 degree LPL 32”, 42” - CR > 10
3. White White X -0.03 0.279/0.279/0.279 +0.03
coordinate Y 0.292/0.292/0.292
Red X 0.635/0.636/0.635
Y0.339/0.343/0.344
Green X 0.282/0.284/0.286
Y0.606/0.615/0.614
Blue X 0.145/0.144/0.146
Y0.064/0.063/0.061
4. Contrast ratio CR 600 800 32" LPL(0-RT)
800 1000 42" LPL(0-RT)
5. Luminance Variation 1.3

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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
7. Component Video Input (Y, PB, PR)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
1. 720*480 15.73 59.94 13.500 SDTV, DVD 480I(525I)
720*480 15.75 60.00 13.514 SDTV, DVD 480I(525I)
2. 720*576 15.625 50.00 13.500 SDTV, DVD 576I(625I)
3. 720*480 31.47 59.94 27.000 SDTV 480P
720*480 31.50 60.00 27.027 SDTV 480P
4. 720*576 31.25 50.00 27.000 SDTV 576P
5. 1280*720 44.96 59.94 74.176 HDTV 720P
1280*720 45.00 60.00 74.250 HDTV 720P
6. 1280*720 37.50 50.00 74.25 HDTV 720P 50Hz
7. 1920*1080 33.72 59.94 74.176 HDTV 1080I
1920*1080 33.75 60.00 74.250 HDTV 1080I
8. 1920*1080 28.125 50.00 74.250 HDTV 1080I 50Hz,
9. 1920*1080 67.5 60.00 148.5 HDTV 1080P
10. 1920*1080 56.25 50 148.5 HDTV 1080P 50Hz
8. RGB Input ( PC )
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
1720*400 31.469 70.08 28.32 DOS
2. 640*480 31.469 59.94 25.17 VESA(VGA)
3640*480 37.500 75.00 31.50 VESA(VGA)
4800*600 37.879 60.31 40.00 VESA(SVGA)
5800*600 46.875 75.00 49.50 VESA(SVGA)
61024*768 48.363 60.00 65.00 VESA(XGA)
71024*768 56.476 70.06 78.75 VESA(XGA)
81024*768 60.023 75.02 79.50 VESA(XGA)
91280*768 47.776 59.87 80.125 WXGA(42XGA,50",60")
10 1360*768 47.712 60.01 85.50 WXGA(42XGA,50",60")
11 1366*768 47.700 60.00 84.62 WXGA(42XGA,50",60")
9. HDMI Input ( PC )
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
1720*400 31.469 70.08 28.32 DOS
2640*480 31.469 59.94 25.17 VESA(VGA)
3640*480 37.500 75.00 31.50 VESA(VGA)
4800*600 37.879 60.31 40.00 VESA(SVGA)
5800*600 46.875 75.00 49.50 VESA(SVGA)
61024*768 48.363 60.00 65.00 VESA(XGA)
71024*768 56.476 70.06 75.00 VESA(XGA)
81024*768 60.023 75.02 78.75 VESA(XGA)
91280*768 47.776 59.87 79.50 WXGA(42XGA,50",60")
10 1360*768 47.712 60.01 85.50 WXGA(42XGA,50",60")
11 1366*768 47.700 60.00 84.62 WXGA(42XGA,50",60")

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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
10. HDMI input ( DTV )
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
1. 720*480 31.47 59.94 27.000 SDTV 480P
2. 720*480 31.50 60.00 27.027 SDTV 480P
3. 720*576 31.25 50.00 27.000 SDTV 576P
4. 1280*720 44.96 59.94 74.176 HDTV 720P
5. 1280*720 45.00 60.00 74.250 HDTV 720P
6. 1280*720 37.50 50.00 74.25 HDTV 720P 50H
7. 1920*1080 33.72 59.94 74.176 HDTV 1080I
8. 1920*1080 33.75 60.00 74.250 HDTV 1080I
9. 1920*1080 28.125 50.00 74.250 HDTV 1080I 50Hz
10. 1920*1080 67.5 60.00 148.5 HDTV 1080P
11. 1920*1080 56.25 50 148.5 HDTV 1080P 50Hz

- 10 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LP7BB chassis
(Saturn Analog DVR) manufactured at LG TV Plant all over
the world.
2. Specification
2.1 Because this is not a hot chassis, it is not necessary to
use an isolation transformer.
However, the use of isolation transformer will help to
protect test instruments.
2.2 Adjustment must be done in the correct sequence.
2.3 The adjustment must be performed at 25±5°C
temperature and 65±10% relative humidity if there is no
specified designation.
2.4 The input voltage of the receiver must be kept between
100-220V, 50/60Hz.
2.5 Before adjustment, execute Heat-Run for 30 minutes at
Full White mode.(Power on key)
3. PCB assembly adjustment items
* Channel memory
- Download the channel data from BOM to EEPROM by
using LGIDS.
* Option adjustment following BOM
- Tool Option1
- Tool Option2
- Area Option
(Fig.1)
1) Push the ADJ key in the Adjust Remocon.
2) Input the Option Number that was specified in the BOM,
into the Shipping area.
3) Select "Tool Option1/ Tool Option2/ Area Option" by using
(CH+/-) key , and press the number key(0~9)
consecutively
ex) If the value of Tool Option1 is 7, input the data using
number key "7" (Fig. 1)
4. SET assembly adjustment items
Auto AV Color Balance
Adjustment of White Balance
Auto Component Color Balance adjustment
- Standard equipment : MSPG925FA
Auto RGB Color Balance adjustment
- Standard equipment : MSPG925FA
(At DVR model Case, Please check DVR function like
following list )
Checking DVR Function and HDD
Check DVR Function as follow on 4.2 and find HDD failure
under malfunction.
5. HDD Assembly Adjustment method
5.1. HDD FORMAT
1) Assemble MAIN , DVR Board.
2) HDD Format in progress words will create automatically.
3) Please, wait for 30~40 seconds.
5.1.1. HDD Format in progress
5.1.2. HDD Format completed
5.2. Sub Program Download for "DVR" by using USB
memory stick
1) connect USB memory stick to SET
2) Set power off -> ON
- DVR s/w will be installed automatically
LP7BA LPL 42 Normal
S/W Version X.XX
DVR Version X.XX
UTT XX hr
Tool Option1 7
Tool Option2 161
Area Option 16
:

- 11 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
6. EDID
Caution
* Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
=> Caution : - Never connect HDMI & DVI-D & DVI-A Cable
at the same time.
- Use the proper cables below for EDID Writing
6.1. Data
6.1.1 ANALOG(256 Bytes )
BLOCK1 (128BYTE)
6.1.2 HDMI(256 Bytes )
BLOCK1 (128BYTE)
BLOCK2 (128BYTE)
7. ADC Calibration
=> Caution : - System control RS-232 Host should be "PC"
for adjustment.
Press the FRONT-AV KEY on R/C for converting input
mode.
(change RS-232 Host : pc, Band Rate : 115200bps)
7.1 Adjustment of RF/AV/S-VIDEO
* Required Equipments
- Remote controller for adjustment
- 802F Pattern Generator, Master (MSPG-925FA), etc.
- MSPG-925FA Pattern Generator
(Which has Video Signal: 100% Color Bar Pattern
shown in Fig. 2)
=> Model: 202 / Pattern : 65
(Fig. 2)
7.1.1 Method of Auto RF/AV/S-VIDEO Color Balance.
1) Press the FRONT-AV KEY on R/C for converting input
mode.
2) Input the Video Signal: 100% Color Bar signal into AV
3) Set the PSM to Dynamic mode in the Picture menu.
4) Press INSTART key on R/C for adjustment.
5) Press the (Vol. +) key to operate the set, then it
becomes automatically
6) Auto-RGB OK means the adjustment is completed
7.1.2 Requirement
- This AV color balance adjustment should be performed
before White Balance Adjustment.
- After AV color balance adjustment, Change the mode
from AV to RF.
(Cancel Heat-run mode.)
ADC RF/AV/S-VIDEO Component RGB
MSPG925FA PAL NTSC Model:217 720P Model: 60
INPUT AV3-ZF VIDEO1 -MA Pattern:65 1024*768 60Hz
SELECT AV1-TB * 100% Color Bar Pattern: 65
Model: 202 Model:201
* 100% Color Bar
(PAL-BGDHI) (NTSC)
Pattern: 65 Pattern: 65
* 100% Color Bar * 100% Color Bar

- 12 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
7.2 Adjustment of Component.
* Required Equipments
- Remote controller for adjustment
- 802F Pattern Generator, Master (MSPG-925FA), etc
- MSPG-925FA Pattern Generator
(Which has 720p@60Hz YPbPr signal : 100% Color
Bar Pattern shown in Fig. 3 )
=> Model: 217 / Pattern: 65
- It is very import to use correct adjustment pattern like
Fig.3.
a. Within the pattern, color sequence should be aligned
: White-Yellow-Cyan-Green-Magenta-Red-BLUE-
BLACK
(If color sequence is reversed (Black -> …-> White),
reverse the pattern with REV key, when using Master
pattern generator like MSPG-925)
b. If Minimum Black Level and/or Maximum White Level
is not correct, Do select 100% Color Bar Pattern.
(Fig. 3)
7.2.1 Method of Auto Component Color Balance
1) Input the Component 720p 100% Color Bar(MSPG-
925FA model:217, pattern:65) signal into Component.
(MH : component 1 )
2) Set the PSM to Dynamic mode in the Picture menu
3) Press the INSTART key on R/C for adjustment
4) Press the (Vol. +) key to operate the set, then it
becomes automatically
5) Auto-RGB OK means the adjustment is completed
7.3 Adjustment of RGB
* Required Equipments
- Remote controller for adjustment
- 802F Pattern Generator, Master (MSPG-925FA), etc
- MSPG-925FA Pattern Generator
(Which has XGA [1024*768] 60Hz PC Format output
signal : 100% Color Bar Pattern shown in Fig. 4 )
- It is very import to use correct adjustment pattern like
Fig. 4.
a. Within the pattern, color sequence should be aligned
: White-Yellow-Cyan-Green-Magenta-Red-BLUE-
BLACK
(If color sequence is reversed (Black -> …-> White),
reverse the pattern with REV key, when using Master
pattern generator like MSPG-925)
b. If Minimum Black Level and/or Maximum White Level
is not correct, Do select 100% Color Bar Pattern
(Fig. 4)
7.3.1 Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz with 100% color bar
pattern like Fig.4. into RGB.
(Ex. MSPG-925FA, model:60, pattern:65)
2) Set the PSM to Dynamic mode in Picture menu
3) Press the INSTART key on R/C for adjustment
4) Press the (Vol. +) key operate To set , then it
becomes automatically
5) Auto-RGB OK means adjustment is completed

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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
8. White Balance
* Caution : Before White-balance, the AV ADC should be done.
=> Notice
- Do the white balance adjustment under the 10LUX
- Before white balance, press the In-start key 2times and do
the reset like Fig.5
- Use the Torino inner pattern(216 gray pattern)
- To enter White-balance mode,press the IN-START key
2times.
* Caution : - System control RS-232 Host should be "PC" for
adjustment.
(Fig. 4)
* Test Equipment
LCD : Color Analyzer ( CA-110), PDP : Color Analyzer (CA-
100)
CA-210 : The both of LCD and PDP are available.
PC (for communication through RS-232C) -> UART Baud
rate : 115200
Pattern Generator (MSPG-925FA etc. )
* Color Temperature & Color Coordinates Setting
When adjusting the Color Temperature of LCD, Color
AnalyzerCA-210(Matrix should be corrected through CH9 of
CS-1000) should be used.
When adjusting the Color Temperature of PDP, Color
AnalyzerCA-210(Matrix should be corrected through CH10
of CS-1000) should be used.
Adjust the Color Temperature based below adjustment color
coordinates.
Even if CH9 of CA-210 is corrected with Matrix, there may
be many character of Module and Filter.
Therefore Refer to the below Color Coordinates Target.
But, in case of WCG module, use the CH12 of CA-210.
White Balance(Hex)
Color Temp. Cool
Red Gain. 80
Green Gain. 80
Blue Gain. 80
Red Offset 80
Green Offset 80
Blue Offset 80
Reset _ To set

- 14 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TROUBLESHOOTING
1. No power
Symptom
1) Minute discharg e doesn’t occur at module. 2) Front LED does n’t come into ac tion.
Start check
Is inserted a pl ug
in power cord?
Is connected the Line
Filter and PSU?
Is normal the fuse of
PSU? Plasma (F101),
LCD(F111 )
Plug in a power cord Connect a cable. Plasma (EL11), LC D(SC100 ) Replace the fuse
Is it connected tha t
PSU and 13 pin cable
in VSC board ?
Connect the 13pin cable.
YE S YE S YE S YE S
NO NO NO NO
After re mo ve all cab les con nec ted to PSU (except the C N101) , author izes the AC vo ltage marking on manual. When ST -by 5V doesn’t operate , replace PSU

- 15 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Symptom
1) After once shining, it doesn’t discharge minutely from module. 2) The relay falls. ( The sound is audible "Click ") 3) It is converted w ith the co lor where the front LED is red from gr een .
2. Protection mode
Start check
Is the PSU
no rmal?
Is the each
connector norma l?
Is t he Y- Board
no rmal ?
Is output the no rmality Lo w/High Voltage except Stand-by 5V? Replace the power board After connecting we ll each connector the normality it operates? Replace the power board
Is no rmal the output voltage after remove P1 connector of Y-B/D? Replace Y-B/D
Is no rmal the fuse
(FS2,FS3 ) on Y-B/D?
Replace the fuse
Is the Z - Board
no rmal ?
Is no rm al the output vo ltage after remove P1 connector of Z-B/D? Replace Z -B/D
Is no rmal the fuse
(FS1,FS2 ) on Z-B/D?
Replace the fuse
Is t he X- Board
no rmal ?
After remove P100,110 output voltage normality: Re place Right X-B/ D Afte r remo ve P200,210 output voltage normality: Replace Left X- B/D
Is norm al the output vo ltage
after re move P100,110,200,210
connector of X- B/D?
YE S YE S YE S YE S
YE S YE S
NO NO NO NO NO
NO NO

- 16 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. No Raster
Sy mptom
1) No OSD and image occur at screen. 2) It maintains the condition where the front LED is green
Start check
Is the link cable
normal?
Reconnect the link cable in P600
NO
Is the IC700’s
output normal?
NO Replace the VSC
Does minute
discharge at
Module?
NO Is the
inverter/ VaV s
on?
Check the PDP/LCD Module
Is output the normality Lo w/High Voltage except Stand-by 5V?
Replace the power board
YE S YE S
YE S
NO

- 17 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. In case of becomes unusual displayfrom RF mode(Main)
A
Is normal video output
of the Tuner?
(Check TU200_Pin14)
Is normal the I2C communication ?
(Check Pin5, Pin4)
Is normal the Input voltage ?
(Check L308)
Is normal the Input voltage ?
(Check Pin8, Pin6)
Is normal video
output of CXA2069Q?
(Check R324, In case of S-Video
check R324, R328)
Is the Tuner Cable
connected well?
Change the TunerCheck the powerCable inserts well.
Is normal the
I2C communication ?
(Check R309, R310)
Change the IC(IC300)
Check the power
( Check L1004)
Change the IC(IC700)
Is the LVDS Cable
connected well? Cable inserts well
NO NO NO
YE S
NO YE S YES
YE S YE S
YE S
NO
NO NO
NO

- 18 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5. In the case of becomes unusual display from rear AV mode(main) 6. In the case of becomes unusual display from rear S-Video mode(main) 7. In the case of becomes unusual display from side AV mode(main)
Is normal video input
of the A/V jack?
Is normal video input
of the A/V jack?
Is normal video input
of the A/V jack? Check the input source
Same as Block A Same as Block A Same as Block A
Check the input source Check the input source
YES
NO
YES
NO
YES
NO

- 19 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
8. In the case of becomes unusual display from side S-Video mode(main)
Is normal video input
of the A/V jack?
(Check R339, R341, L310)
Check the input source
Same as Block A
YES
NO

- 20 -
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
13. In case of becomes unusual display from RF mode(Sub)
Is normal video output
of the Tuner?
(Check TU201_Pin14)
Is normal the I2C communication ?
(Check Pin5, Pin4)
Is normal video
output of CXA2069Q?
(Check R312, In case of S-Video
check R312, R314)
Is the Tuner Cable
connected well?
Is normal the Input voltage ?
(Check Pin8, Pin6)
Is normal the Input voltage ?
(Check L308)
Is normal the
I2C communication ?
(Check R309, R310)
Change the IC(IC300)
Check the power
( Check L1004)
Change the IC(IC700)
Is the LVDS Cable
connected well? Cable inserts well
Change the Tuner
Check the power
( L1103)
Cable inserts well.
B
NO
NO NO
NO NONO
NO
YES YES YES
YES YES
YES YES
14. In case PIP doesn’t display from other modes(Sub)
Same as the case of main except block A should be change to B