LG 15LS1R SERIES User manual

R
LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : CL-81
MODEL : 15LS1R 15LS1R-MG
website:http://biz.LGservice.com
Internal Use Only

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 2 -
CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION ........................................................................................6
ADJUSTMENT INSTRUCTION .................................................................9
ISP MANUAL ...........................................................................................12
TROUBLE SHOOTING ............................................................................16
BLOCK DIAGRAM...................................................................................20
EXPLODED VIEW .................................................................................. 22
REPLACEMENT PARTS LIST ............................................................... 24
SVC. SHEET ...............................................................................................

- 3 - LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩand 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
1.5 Kohm/10W
To Instrument’s
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 4 -
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

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

- 6 -
SPECIFICATION
LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. Application range
This specification is applied to CL-81 chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below condition.
(1) Temperature: 25°C ± 2°C
(2) Humidity: 65% ± 10%
(3) Power: Standard input voltage (AC 100-240V, 50/60Hz)
(4) Measurement must be performed after heat-run more than 30min.
(5) Adjusting standard for this chassis is followed a special standard.
3. General Specification
NOTE : Specifications and others are subject to change without notice for improvement .
No. Item Content Remark
1
2
3
4
5
6
7
8
9
8Keys
NATION
LPL
LC150X02-TL01
Brand
15LS1R-MG
North America
15” LCD-TV
CL-81
Channel(D,E), Volume(F,G), OK, Menu, Input, Power
Length : 1.87 ± 0.04 M
Shape : Wall-out
Color : BLACK
No
Maker LPL
Type TFT Color LCD Module
Active Display Area 15.0 inches(380.16mm) diagonal(Aspect 4:3)
Pixel Pitch [mm] 0.297mm(H)x0.297mm(V)x RGB
Electrical Interface LVDS
Color Depth 6BIT, 16,777,216 colors
Size [mm] 332.8(H) x 262.2(V) x 18(D)
Surface Treatment Anti-Glare(HAZE 3%), Hard Coating(3H)
Operating Mode Normally Black
Back light Unit 4 CCFL(4 lamps)
R/T Typ. R.T.: 5ms + F.T.: 11ms(Typ)
Customer
User Model Name
Sale region
Feature
Chassis Name
General Scope External SW & Adj.
Power Cord
Power Adapter
LCD Module Feature

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 7 -
5.Optical Character
Item Remark Specification
Viewing Angle
<CR
≥ 10>
Luminance
Contrast Ratio
CIE Color Coordinates
All White/All Black
In PC input
Contrast 100/Brightness 50
In AV Input
PSM : Standard
White
(100 IRE)
R/L,
U/D
Luminance(cd/m2)
Variation
CR
White Wx
(Normal) Wy
White Wx
(Warm) Wy
White Wx
(Normal) Wy
White Wx
(Cool) Wy
Typ
65/65
45/55
400
400
0.283
0.298
0.313
0.329
0.283
0.298
0.274
0.286
Min
55/55
40/50
300
300
0.253
0.268
0.283
0.299
0.253
0.268
0.244
0.256
Max
1.3
0.313
0.328
0.343
0.359
0.313
0.328
0.304
0.316
No.
1
2
3
4
4. Mechanical Specification
No.
1 Product Dimension Width(W) Length(D) Height(H)
Before Packing 463.3 166.3 353.5 With Stand
After Packing 527 175 470
2 Product Weight LPL
Only SET 4.44 Kg
With BOX 5.54 Kg
3 Container Loading 20ft 40ft
Quantity Individual or Indi. Wooden Indi. Wooden
Palletizing 858 720 1716 1584
4 Stand Assy Type Base detachable
Size (W x D x H) 302.2 x 166.3 x 68
Tilt Degree -3º (-0/+3º) ~10º (±2)
Tilt force Target 1.5Kgf(0.8Kgf ~ 2.0Kgf)
5 Appearance General Refer to Standard of LG(55)G1-1020
Item Content Remark

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 8 -
6.Engineering Specification
6-1.General Specification
No Item Specification Remark
1 ENERGY SYNC(V/H) VIDEO POWER CONSUMPTION LED COLOR
Normal On/On Active ≤40W BLUE
Sleep Mode Off/On
(PC Mode) On/Off Off ≤1W Amber
Off/Off
Off Mode - Off ≤1W Off(PC)
Amber(TV/AV)
2 D-SUB 1 : RED 2 : GREEN 10 : DIGITAL GND
Pin configuration 3 : BLUE 4 : ID2 (GND)
5 : S.T (GND) 6 : RED
7 : GREEN GND 8 : BLUE GND
9 : N.C 10 : D-GND
11 : ID0(GND) 12 : SDA
13 : H-SYNC 14 : V-SYNC
15 : SCL SHELL : GND
3 Control Function 1) Contrast / Brightness
2) H-Position
3) Tracking : Clock / Phase
4) Auto Configure
5) Reset

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 9 -
1. Application
This document is applied to 15", 20" LCD TV which is
manufactured in Monitor Factory or is produced on the basis
of this data.
2. Designation
2.1 The adjustment is according to the order which is
designated and which must be followed, according to the
plan which can be changed only on agreeing.
2.2. Power Adjustment: Free Voltage
2.3. Magnetic Field Condition: Nil.
2.4. Input signal Unit: Product Specification Standard
2.5. Reserve after operation: Above 30 Minutes
2.6. Adjustment equipments: Pattern Generator (MSPG-925
or Equivalent), DDC Adjustment Jig equipment, SVC
remote controller
3. Adjustment
3.1 APC
After Manual-Insult, executing APC
3.2 ISP UOC file
3.2.1 Required Equipment
- JIG for ISP
- PC that is installed with "WISP" program.
- Control + Power LED PCB Ass'y
3.2.2 ISP Sequence
1) Connect main board with JIG for ISP
2) Execute "WISP" Program.
3) Compare UOC version in BOM with version of hex file.
4) Push "Browse..." button and select hex file.
5) Push " Auto Execute" button.
6) Occur an Error, push "Erase" button and try again and
again. 2)~5)
7) After finishing ISP, Must AC off / ON
8) Wait LED is not blink anymore
3.3 ADC Process
"IIC_ SW" must set "0"(After ISP, automatically set "0")
3.3.1 PC input ADC
3.3.1.1 Auto Gain/Offset Adjustment
AConvert to PC in Input-source
Push "INSTART" in service remocon select "Auto
ADC"
ASignal equipment displays
Output Voltage : 730 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Pattern : gray pattern that left & right is black and center
is white signal (Refer below picture).
(Model : 37, Pattern : 28 at MSPG925L)
AEnter SVC menu and select "AUTO ADC" => "AUTO
GAIN" => G
After check autocontrol of ADC, push menu key for
exiting SVC Menu.
3.3.1.2 Confirmation
AWe confirm whether "0x00" address of EEPROM
"0xA0" is "0xAA" or not.
AIf "0x00" address of EEPROM "0xA0" isn't "0xAA", we
adjust once more
AWe can confirm the ADC values from "0x06~0x0B"
addresses in a page "0xA0"
3.3.2 AV(CVBS) Mode Adjustment
3.3.2.1 Auto Gain/Offset Adjustment
ASelect AV(Video) in Input menu
ASignal equipment : MSPG925
Output Jack : CVBS
Output Voltage : 730 mVp-p (patt # 28 in MSPG925)
Resolution : NTSC J - 720 x 480 @59,94Hz (Model
#207 in MSPG925)
AEnter SVC menu and select "AUTO ADC"=>"AUTO
GAIN" => G
After check autocontrol of ADC, push menu key for
exiting SVC Menu.
3.3.2.2 Confirmation of adjustment process
AWe confirm whether "0x01" address of EEPROM
"0xA0" is "0xAA" or not.
AIf "0x01" address of EEPROM "0xA0" isn't "0xAA", we
adjust once more in adjustment line by adjust method
of 3.2.1.2.
AWe can confirm the ADC values from "0x0C~0x11"
addresses in a page "0xA0"
3.3.3 Component Mode Adjustment
3.3.3.1 Auto Gain/Offset Adjustment
ASelect Component in Input menu
ASignal equipment : MSPG925
Output Jack : D4(Japan) or Component(Except Japan)
Output Voltage : 700 mVp-p (patt # 8 in MSPG925)
Resolution 483/60P - 720 x 483p @59.94Hz (Model
#212 in MSPG925)
AAdjust by commanding AUTO_COLOR_ADJUST
(0xF1) 0x00 0x00 instruction.
3.3.3.2 Confirmation of adjustment process
AWe confirm whether "0x01" address of EEPROM
"0xA0" is "0xAA" or not.
AIf "0x01" address of EEPROM "0xA0" isn't "0xAA", we
adjust once more in adjustment line by adjust method
of 3.2.1.2.
AWe can confirm the ADC values from "0x??~0x??"
addresses in a page "0xA0"
*Caution*
If DDC CMD don't work, please check below.
1. Enter SVC menu by SVC Remote controller
2. Enter "ETC" menu
Check please, IIC_SW is "0" or "1".
- IIC_SW "0" : DDC Communications.(DDC2AB)
- IIC_SW "1" : EDID Write/Read (DDC2B) and Factory
default.
ADJUSTMENT INSTRUCTION

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 10 -
3.4 Function Check
3.4.1 Check display and sound
"IIC_ SW" must set "1"
ACheck Input and Signal items. (cf. work instructions)
1. TV
2. AV (CVBS/ S-Video)
3 Component
4. H/P Out
3.4.2 DCXO Adjustment
3.4.2.1 DCXO Adjustment :
AConvert to AV in Input-Mode
ASignal equipment displays 0.7V, 8 Step color pattern.
(Model:207, Pattern: 38 at MSPG925L)
- Output Voltage : 700 mVp-p
- Impress Resolution 576i and Color pattern which
follows in the MSPG925L.
A Adjust by commanding AUTO_DCXO (0xFC) 0x00
0x00 instruction.
[Adjustment pattern(DCXO)]
* Caution*
If DDC CMD do n't work, please check below.
1. Enter SVC menu by SVC Remote controller
2. Enter "ETC" menu
Check please, IIC_SW is "0" or "1".
- IIC_SW "0" : ADC calibration with auto adjustment equipment..
- IIC_SW "1" : Factory default (Shipping condition), DDC
Communications(DDC2B).
4. Total Assembly line process
4.1 Adjustment Preparation
"IIC_ SW" must set "0"
AAbove 30 minutes H/run in RF no signal
A15 Pin D-Sub Jack is connected to the signal of
Pattern Generator.
4.2 Confirmation of Luminance
ASet Statement
Input : CVBS
Contrast : 100(Max)
Brightness : 50
CSM : Normal
ASignal equipment displays
Output Voltage : 700 mVp-p
Output Mode : Full White pattern (100 IRE)
AConfirm whether luminance is over 260cd or not
4.3 Confirmation of Color Coordinate
AInput Full White Pattern
ASet CSM : Normal (9300K)
AConfirm whether x = 0.283±0.03, y=0.298±0.03 or not
ASet CSM : Warm (6500K)
AConfirm whether color coordinate is x= 0.313±0.03,
y=0.329±0.03 or not
ASet CSM : Warm (11000K)
AConfirm whether color coordinate is x= 0.274±0.03,
y=0.286±0.03 or not
AAfter confirming Color coordinates, Must return to
Normal
* After Confirming color coordinate and luminance, "IIC_ SW"
must set "1"

- 11 -
5. Outgoing Condition
LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
ITEM Outgoing Condition Remarks
Outgoing Input Source TV
Condition Volume Level 30
Power S/W Off
Channel EZ scan To Start
Manual Program TV 2
Erase
Fine 0
Picture EZ Video Clear
ACC Normal-Only USA
Sound AVL Off
Balance 0
Timer Clock Auto G
Off Timer --:--
Off
On Timer --:--
TV 2
Volume 30
Off
Auto Off Off
Special Language English
Input TV
Key lock Off
Power indicator On
Caption/Text CC1 Canada/
Captions Off USA Only
Parental To set (Code : 0000)
Screen Auto Configure To Set Only
Manual Configure To Set RGB PC
Reset To Set INPUT

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 12 -
OLOC ISP Mode.
Push IN-START => IN-STOP => TILT at Service remocon in order then SET-ON LED(Green) will be blinking.
*If ST-BY(Red) blinks, please push TILT key once.
OLOC Download.
1. After LED checking, execute "WISP" program.
2. Compare LOC version in BOM with version of hexfile.
3. Push "Browse…" in WISP program and select hex file.(1)
4. Push "Auto Execute" after loading file.(2)
5. After Writing Flash memory, check OK message. (3)
6. After finishing ISP, turn OFF Main Power AC switch and then turn ON the switch.
7. Red LED is blinking during writing default value in EEPROM(24C32) after turn on the switch.
8. ALL LOC ISP process is finished when Red LED is off and Green LED is ON.
9. After ISP, automatically input source change "AV2" and II_SW set to "0")
ISP Manual
1. Connect between PC for ISP and Parallel port Jig though parallel port and USB cable.
Parallel port Jig and Down-Load JIG though D-sub port.
2. After set on Main board on pull the Lever at right, turn on ISP Down-Load JIG.(Push the MAIN POWER ON/OFF.)
D-Sub Cable
Supply AC220 V.
Parallel port
(Directly connection)
USB Parallel port JIG
Lever
MAIN Power ON/OFF

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 13 -
# If you can’t use service remocon or enter ISP mode, please follow the method.
(The method uses manual WISP program)
1. Change from WISP Automatic mode on to manual mode and then push Enter ISP Mode.
2. As soon as turn on AC power, push Send quickly and again. Check the following message in ISP status.
*If ISP status is not ready, try again from AC power on.
3. After Entering ISP mode, Push Erase Flash and Send. (Take turns (1)~(4) ).
*If Erase Flash is not OK, try again Erase Flash.
Check all OK!

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 14 -
4. After Erase Flash, Push Write Flash. Then select hex file after push Browse. Check file loading.
Push Send and wait for writing flash. (Take turns (5)~(7) )
5. Push Verify Flash and Send.(Take turns (8)~(9).) Finally, Turn off and on Main AC Power and wait for ending LED blinking.
OSEDNA ISP Mode.
Push IN-START => IN-STOP => TILT => TILT at Service remocon in order then ST-BY(Red) will be blinking.
*If SET-ON LED(Green) blinks, please push TILT key once.
OSEDNA Download
1. After LED checking, execute "ISP_Tool" program.
2. Push Identity and check connection message.
Check all OK!
filename.hex

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 15 -
3. Push "Select Intel HEX File" and select hex file.(1)
4. Push "Erase" => "Program" => "Verify" => "Restart System" after loading file.
(Take turns (2)~(5) ).
5. Check whether each stage (2)~(5) is successful in message box.
6. After finishing ISP, turn OFF Main Power AC switch and then turn ON the switch.

- 16 - LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TROUBLESHOOTING
No power
(LED indicator off)
Check short of main B/D
or Change Lips
Change U406
Change LED Assy
Check 15V or 5V
of Lips
Check Output of
U406
Check LED Assy
Check J103, J125, J126
Connector
Fail
Fail
Change Q402
Check Output of
Q402 Fail
Pass
Fail
Pass
Pass
Pass
:[A]Process

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 17 -
No Raster
Check LED Status
on display unit
Check the input/
Output of U301
Check
U401~U405, U407, U409
Check inverter
Connector or inverter
Check input source cable and jack
Repeat [A] PROCESS
Fail
Change U401~U405,
U407, U409
Fail
Change U301
Fail
Change inverter
connector or inverter
Fail
Change panel link
cable or module
Fail
Check panel link
Cable or module
Pass
Pass
Pass
Pass
Pass
:[B]Process

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 18 -
No Raster on AV Signal
(Component, CVBS, S-VHS) No Raster on TV(RF) signal
Change Q113, Q114,
Q115, R194, R198, R184
Check the signal of
Q113, Q114, Q115
R194, R198, R184
Repeat
[A] Process Check the output of
TU701
Check the
input/output of U301
Check the
input/output of U101
Check input source cable and jack
Fail
Fail Fail
Fail
Re-soldering or
Change the defect part
Check X301
Fail
Re-soldering or
Change the defect part
Check 5V, 33V of TU701
Re-soldering or
Change the defect part
Pass
Pass
Pass
Pass

LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 19 -
No Sound
Check the speaker wire
Change source input
Check the
input source Fail
Pass
Re-soldering or
Change the defect part
Check X301
Check the input/output
of U301 Fail
Pass
Re-soldering or
Change the defect part
Check the input/output
of U201 Fail
Pass
Change speaker
Check the speaker
Fail
Pass

- 20 - LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
BLOCK DIAGRAM