LG 22LS5400/540T User manual

Printed in KoreaP/NO : MFL67605201 (1207-REV00)
CHASSIS : LD02M
MODEL : 22LS5400/540T
MODEL : 22LS5400/540T-ZA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED LCD TV
SERVICE MANUAL
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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Only for training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SERVICING PRECAUTIONS ................................................................... 4
SPECIFICATION ...................................................................................... 6
ADJUSTMENT INSTRUCTION ............................................................... 9
TROUBLE SHOOTING .......................................................................... 14
BLOCK DIAGRAM ................................................................................. 22
EXPLODED VIEW .................................................................................. 23
SCHEMATIC CIRCUIT DIAGRAM ..............................................................

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Only for training and service purposes
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 1 W), keep the resistor 10 mm 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 1 MΩ and 5.2 MΩ.
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 1.5 K / 10 watt resistor in parallel with a 0.15 uF 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
0.5 mA.
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
IMPORTANT SAFETY NOTICE
SAFETY PRECAUTIONS

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SERVICING PRECAUTIONS
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 conict 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 mod-
ule 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 explo-
sion 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 specied 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 ammable mixture.
Unless specied 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 xtures specied in this
service manual.
CAUTION: Do not connect the test xture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged eas-
ily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some eld-effect transistors
and semiconductor “chip” components. The following techniques
should be used to help reduce the incidence of component dam-
age 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. Alter-
natively, obtain and wear a commercially available discharging
wrist strap device, which should be removed to prevent poten-
tial 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 expo-
sure 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 classied as “anti-static” can generate
electrical charges sufcient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufcient 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 electri-
cally 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 replace-
ment ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your
foot from a carpeted oor can generate static electricity suf-
cient 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 1.25 cm) 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 ows onto and around both the compo-
nent 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.

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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 at against the cir-
cuit 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 pos-
sible 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 connec-
tions).
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 con-
nected 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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Only for training and service purposes
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This specification is applied to the LCD TV used LD02M
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
2) Relative Humidity: 65 % ± 10 %
3) Power Voltage
: Standard input voltage (AC 100-240 V~, 50/60 Hz)
* Standard Voltage of each products is marked by models.
4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
5) The receiver must be operated for about 5 minutes prior to
the adjustment.
3. Test method
1) Performance: LGE TV test method followed
2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC
4. Model General Specification
No. Item Specication Remarks
1 Market
Albania, Austria, Belgium, Bosnia, Bulgaria,
Coratia, Czech, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Ire-
land, Italy, Kazakhstan, Latvia, Lithuania,
Luxembourg, Morocco, Netherlands, Nor-
way, Poland, Portugal, Romania, Russia,
Serbia, Slovenia, Spain, Sweden, Slovakia,
Switzerland, Turkey, Ukraine, UK
36-Country
2 Broadcasting system
1) PAL-BG
2) PAL-DK
3) PAL-I/I’
4) SECAM L/L’
5) DVB-T/T2/ C
3 Receiving system
Analog : Upper Heterodyne
Digital : COFDM, QAM
► DVB-T
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32
- Modulation : Code Rate
QPSK : 1/2, 2/3, 3/4, 5/6, 7/8
16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
► DVB-T2
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256,
- Modulation : Code Rate
QPSK : 1/2, 2/5, 2/3, 3/4, 5/6
16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
256-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
► DVB-C
- Symbolrate :
4.0Msymbols/s to 7.2Msymbols/s
- Modulation :
16QAM, 64-QAM, 128-QAM and 256-QAM

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Only for training and service purposes
No. Item Specication Remarks
4 Scart Jack (1EA) PAL, SECAM Scart 1 Jack is Full scart and support RF-
OUT(analog).
5 Component Input (1EA) Y/Pb/Pr
6 CVBS Input (1EA) PAL, SECAM, NTSC
4 System(Rear) : PAL, SECAM, NTSC, PAL60
CVBS Video input is used by common port with
Component.
7 RGB Input RGB-PC Analog(D-SUB 15PIN)
8 HDMI Input (2EA) HDMI1/2 Rear / HDMI version 1.4/ support PC
Support HDCP
9 Audio Input (3EA)
RGB/DVI Audio
Component & CVBS
SCART
L/R Input
CVBS Audio input is used by common port with
Component.
10 Headphone out (1EA) Antenna, AV1, AV2, Component, RGB, HDMI1/2 Angle 1EA
11 USB (1EA) Picture, Music, Movie, SVC Software Update + Picture + Music + Movie
12 Local Key (Touch)
13 LAN JACK Modular 2XLS540T(Only UK)
5. Timing
5.1. RGB/HDMI (PC)
No. Specication Remark
Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz)
1. 720*400 31.468 70.080 28.321
2. 640*480 31.469 59.940 25.175
3. 640*480 37.500 75.000 31.500
4. 800*600 37.879 60.317 40.000
5. 800*600 46.875 75.000 49.500
6. 1024*768 48.363 60.004 65.000
7. 1024*768 60.023 75.029 78.750
8. 1152*864 67.500 75.000 108.000
9. 1280*720 45.000 60.000 74.250
10. 1280*800 49.702 59.810 83.500
11. 1280*1024 63.981 60.020 108.000
12. 1280*1024 79.976 75.025 135.000
13. 1400*1050 65.317 59.978 121.750
14. 1440*900 55.935 59.887 106.500
15. 1600*900 60.000 60.000 108.000
16. 1680*1050 64.674 59.883 119.000
17. 1680*1050 65.290 59.954 146.250
18. 1920*1080 67.500 60.000 148.500

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5.2. HDMI (DTV)
No. Specication Remark
Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz)
1. 720*480 31.469
31.5000
59.940
60.000
27.000
27.030 SDTV 480P
2. 720*576 31.250 50.000 27.864 SDTV 576P
3. 1280*720 37.500 50.000 74.250 HDTV 720P
4. 1280*720 44.960
45.000
59.940
60.000
74.170
74.250 HDTV 720P
5. 1920*1080 33.720
33.750
59.940
60.000
74.170
74.250 HDTV 1080I
6. 1920*1080 28.125 50.000 74.250 HDTV 1080I
7. 1920*1080 27.000 24.000 74.250 HDTV 1080P
8. 1920*1080 33.750 30.000 74.250 HDTV 1080P
9. 1920*1080 56.250 50.000 148.500 HDTV 1080P
10. 1920*1080 67.430
67.500
59.940
60.000
148.350
148.500 HDTV 1080P
5.3. Component
No. Specication Remark
Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz)
1. 720*480 15.730 59.940 13.500 SDTV, DVD 480I(525I)
2. 720*480 15.750 60.000 13.514 SDTV, DVD 480I(525I)
3. 720*576 15.625 50.000 13.500 SDTV, DVD 576I(625I) 50Hz
4. 720*480 31.470 59.940 27.000 SDTV 480P
5. 720*480 31.500 60.000 27.027 SDTV 480P
6. 720*576 31.250 50.000 27.000 SDTV 576P 50Hz
7. 1280*720 44.960 59.940 74.176 HDTV 720P
8. 1280*720 45.000 60.000 74.250 HDTV 720P
9. 1280*720 37.500 50.000 74.250 HDTV 720P 50Hz
10. 1920*1080 33.720 59.940 74.176 HDTV 1080I
11. 1920*1080 33.750 60.000 74.250 HDTV 1080I
12. 1920*1080 28.125 50.000 74.250 HDTV 1080I 50Hz,

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ADJUSTMENT INSTRUCTION
1. Application Range
This document is applied to LD02M chassis LCD LED TV
which is manufactured in TV (or Monitor) Factory or is
produced on the basis of this data.
2. Designation
1) The adjustment is according to the order which is
designated and which must be followed, according to the
plan which can be changed only on agreeing.
2) Power adjustment : Free Voltage.
3) Magnetic Field Condition: Nil.
4) Input signal Unit: Product Specification Standard.
5) Reserve after operation: Above 5 Minutes (Heat Run)
Temperature : at 25 °C ± 5 °C
Relative humidity : 65 % ± 10 %
Input voltage : 220V, 60Hz
6) Adjustment equipments: Color Analyzer(CA-210 or CA-110),
DDC Adjustment Jig equipment, Service remote control.
7) Push The "IN STOP KEY" – For memory initialization
3. Main PCB check process
* APC - After Manual-Insult, executing APC
* Boot le Download
1) Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
2) Set as below, and then click “Auto Detect” and check “OK”
message. If display “Error”, Check connect computer, jig,
and set.
3) Click “Connect” tab. If display “Can’t”, Check connect
computer, jig, and set.
4) Click “Read” tab, and then load download file(XXXX.bin) by
clicking “Read”
5) Click “Auto” tab and set as below
6) Click “Run”.
7) After downloading, check “OK” message.
* USB DOWNLOAD(*.epk file download)
1) Make New folder named “LG_DTV” and put ISP file(*.epk)
in the folder.
2) Put the USB Stick to the USB socket.
3) Automatically detecting update file in USB Stick
- If your downloaded program version in USB Stick is Low,
it didn’t work.
- But your downloaded version is High, USB data is
automatically detecting
4) Show the message "Copying files from memory"
5) Updating is staring.
6) Updating Completed, The Multi-vision will restart
automatically.
7) If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)
* If downloading version is more high than your TV have,
TV can lost all channel data. In this case, you have to
channel recover. if all channel data is cleared, you didn’t
have a DTV/ATV test on production line.
* After downloading, have to adjust TOOL OPTION again.
1. Push "ADJ" key in service remote controller
2. Select "Tool Option 1" and Push "OK" button
3. Punch in the number. (Each model has their number.)
Case1 : Software version up
1. After downloading S/W by USB , TV set will reboot
automatically.
2. Push “In-stop” key.
3. Push “Power on” key.
4. Function inspection
5. After function inspection, Push “In-stop” key.
Case2 : Function check at the assembly line
1. When TV set is entering on the assembly line, Push
“In-stop” key at rst.
2. Push “Power on” key for turning it on.
→ If you push “Power on” key, TV set will recover
channel information by itself.
3. After function inspection, Push “In-stop” key.
(1) (3)
(
2
)
OK
Please Check the Speed :
Use the speed under
200KHz.
(4)
filexxx.bin
(
6
)
(5)
(7) ……….OK
(5)

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Only for training and service purposes
3.1. ADC Process
3.1.1. ADC
1) Press the “ADJ” KEY on R/C and enter EZ ADJUST.
2) Enter ADC Calibration mode by pushing “►” key at “7. ADC
Calibration”.
3) Push the “Start” button.
4) ADC Calibration is executed automatically.
5) Press “EXIT” key on R/C.
* ADC Calibration Protocol (RS232)
- Adjust Sequence
• aa 00 00 [Enter Adjust Mode]
• xb 00 40 [Component1 Input (480i)]
• ad 00 10 [Adjust 480i Comp1]
• xb 00 60 [RGB Input (1024*768)]
• ad 00 10 [Adjust 1024*768 RGB]
• aa 00 90 End Adjust mode
3.2. EDID Process
3.2.1. EDID download
1) Press "Power only" key of service remote control.
2) Press the ADJ KEY on R/C and enter EZ ADJUST
3) Enter EDID D/L mode by pushing "►" key at "11. EDID D/L".
4) EDID download is executed automatically.
5) Press EXIT key on R/C.
<Caution>
- Never connect HDMI & D-sub Cable when download EDID.
- Download HDMI1, HDMI2 separately because HDMI1 is dif-
ferent from HDMI2.
* Edid data and Model option download (USB)
3.2.2. RGB EDID Data
1) 22LS5400/T(Product ID : 22871)
*(week), **(year), ***(Check sum) : Adjustable Data
3.2.3. HDMI EDID Data
2) 22LS5400/T(Product ID : 22872)
*(week), **(year), ***(Check sum) : Adjustable Data
**** (physical address) : (HDMI1 : 10, HDMI2 : 20),
****(Check sum) : (HDMI1 : F6, HDMI2 : E6)
3.3. Function Check
3.3.1. Check display and sound
*Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART/CVBS)
3) COMPONENT (480i)
4) RGB(PC : 1920 x 1080 @ 60Hz)
5) HDMI1/2
6) PC Audio In
* Display and Sound check is executed by Remote controller
<Caution> Not to push the INSTOP KEY after completion if the
function inspection.
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option 5
5. Country Group
6. Area Option
7. ADC Calibration ඖ
8. White Balance
9. 10 Point WB
10. Test Pattern
11. EDID D/L
12. Sub B/C
13. Touch Sensitivity Setting
ADC Calibration
ADC Comp 480i NG
ADC Comp 1080p NG
ADC RGB NG
Start Reset
NO Item CMD 1 CMD 2 Data 0
Enter
Adjust MODE
Adjust
‘Mode In’ A A 0 0 When transfer the ‘Mode In’, Carry the command.
ADC adjust ADC Adjust A D 1 0 Automatically adjustment
(The use of a internal pattern)
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option 5
5. Country Group
6. Area Option
7. ADC Calibration
ඖ
8. White Balance
9. 10 Point WB
10. Test Pattern
11. EDID D/L
12. Sub B/C
13. Touch Sensitivity Setting
EDID D/L
HDMI1
HDMI2
NG
HDMI3
NG
RGB
NG
NG
Start Reset
NO Item CMD 1 CMD 2 Data 0
Enter
download
MODE
Download
‘Mode In’
A A 0 0 When transfer the
‘Mode In’,
Carry the command.
EDID data and
Model option
download
Download A E 00 10 Automatically download
(The use of a internal Data)

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Only for training and service purposes
3.4. CI+ key writing process. (Device CN)
(1) Press "Power on" button of a service R/C.(Baud rate :
115200 bps)
(2) Connect USB.
(3) Write CI+ Key through RS-232-C.
* Connect TV SET and PC which download keys Writing
program by USB-Cable
1) Start “CIKey.exe”Program and Click (3) Button to connect
TV and PC.
2) Click (5) to download CI+ Key.
3) When download succeed, you can see “OK” on Message
tab.
4) Check whether the key was downloaded or not at ‘In
Start’ menu. (Refer to below).
=> Check the Download to CI+ Key value in LG set.
3.4.1. Check the method of CI+ Key value
(1) Check the method on Instart menu
(2) Check the method of RS232C Command
1) Into the main ass’y mode(RS232: aa 00 00)
2) Check the key download for transmitted command
(RS232: ci 00 10)
3) Result value
- Normally status for download : OKx
- Abnormally status for download : NGx
3.4.2. Check the method of CI+ key value(RS232)
1) Into the main ass’y mode(RS232: aa 00 00)
2) Check the mothed of CI+ key by command
(RS232: ci 00 20)
3) Result value
i 01 OK 1d1852d21c1ed5dcx
CMD 1 CMD 2 Data 0
A A 0 0
CMD 1 CMD 2 Data 0
C I 1 0
CMD 1 CMD 2 Data 0
A A 0 0
CMD 1 CMD 2 Data 0
C I 2 0
CI+ Key Value

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Only for training and service purposes
4. Total Assembly line process
4.1. Tool option & ADC Check
1) Press "Power on" key of service remote control.
2) Connect RS232 to USB Signal Cable to USB Jack.
3) Check the 'Tool Option' (Refer to the BOM Comments or
Adjustment spec)
4) Check the ‘ADC’ is ok.
4.2. Model name & Serial number download
4.2.1. Model name & Serial number D/L
1) Press "Power on" key of service remote control.
2) Connect RS232 Signal Cable to RS-232 Jack.
3) Write Serial number by use RS-232.
4) Must check the serial number at the Diagnostics of SET UP
menu. (Refer to below).
4.2.2. Method & notice
1) Serial number D/L is using of scan equipment.
2) Setting of scan equipment operated by Manufacturing
Technology Group.
3) Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0
*Manual Download (Model Name and Serial Number)
If the TV set is downloaded By OTA or Service man,
Sometimes model name or serial number is initialized.( Not
always) There is impossible to download by bar code scan,
so It need Manual download.
1) Press the 'Instart' key of ADJ remote controller.
2) Go to the menu '6.Model Number D/L' like below photo.
3) Input the Factory model name(ex M2352D-PZN) or Serial
number like photo.
4) Check the model name Instart menu → Factory name
displayed (ex M2352D-PZN)
5) Check the Diagnostics (DTV country only) → Buyer
model displayed (ex M2352D)
4.3. Function Check
4.3.1. Check display and sound
* Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART/CVBS)
3) COMPONENT (480i)
4) RGB(PC : 1920 x 1080 @ 60Hz)
5) HDMI1/2
6) PC Audio In
* Display and Sound check is executed by Remote control
* Caution : Not to push the INSTOP KEY after completion if
the function inspection.
4.3.2. PCMCIA CARD Check
You must adjust DTV 29 Channel and insert PCMCIA CARD
to socket.
- If PCMCIA CARD works normally, video signals will appear
on screen.
But it works abnormally, "No CA module" will appear on screen.
* Caution: Set up "RF mode" before launching products.
4.4. White balance adjustment
RGB Gains are fixed data for each model.
Insert RS-232C Jack which is connected with PC for White
Balance or equivalent device.
→ Total Assembly line should be check whether the color
coordinate(x,y) data refer to below table were meet or not.
*Note : x,y coordinates are drifted about 0.007 after 30 mins
heat-run. So checking color coordinate within 5-min at
total assembly line, consider x,y coordinates might be
up to 0.007 than x,y target of each color temperature.
*Note : Manual W/B process using adjusts Remote control.
1) After enter Service Mode by pushing "ADJ" key,
2) Enter "White Balance" by pushing "►" key at "White
Balance".
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Country Group
6. Area Option
7. ADC Calibration
8. White Balance ►
9. 10 Point WB
10. Test Pattern
11. EDID D/L
12. Sub B/C
13. Touch Sensitivity Setting
White Balance
Color Temp.
R-Gain
G-Gain
B-Gain
R-Cut
G-Cut
B-Cut
Test-Pattern
Backlight
Reset
Cool
172
172
192
64
64
64
ON
100
To Set
Color
Temperature
Cool 9,300k °K X=0.285 (±0.03)
Y=0.293 (±0.03)
<Test Signal>
Inner pattern
(204gray,80IRE)
Medium 8,000k °K X=0.295 (±0.03)
Y=0.305 (±0.03)
Warm 6,500k °K X=0.313 (±0.03)
Y=0.329 (±0.03)
Luminance
(cd/m²)
Cool Min : 90 Typ : 110 <Test Signal>
Inner pattern
(204gray,80IRE)
Medium Min : 90 Typ : 110
Warm Min : 90 Typ : 110

- 13 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
* When doing Adjustment, Please make circumstance as
below.
4.5. DPM Operation check
■ Measurement Condition: 100~240V@ 50/60Hz
1) Set Input to RGB-PC and connect D-sub cable to set -
RGB Mode. Set Input to HDMI1/2(with Input Label set to
PC) and connect HDMI1/2 cable to set - HDMI Mode
2) Cut off H sync or V sync of signal.
3) Check DPM operation refer to the below table.
4.6. Model name & SW version & Adjust check.
* Press the ‘Instart’ key of ADJ remote controller
4.6.1. Model Name& SW Version Check
1) Check ‘Model Name’.
2) Check ‘S/W Version’ (Refer to the IC Ver. in the BOM)
4.6.2. Adjust Check
1) Check ‘Country Group’
2) Check ‘Area Option’
3) Check ‘Tool Option’ (Refer to the BOM Comments)
4) Check ‘Adjust ADC[Comp&RGB]’ is OK.
5) Check ‘EDID[RGB&HDMI1/2]’ is OK.
* After check all, Press the 'EXIT' key of ADJ remote control to
go out SVC menu.
4.7. Outgoing condition Configuration
* After all function test., press IN-STOP Key by SVC Remote
control. And make Outgoing Condition.
Operating Condition Sync(H/V) Video LED(SET) Wattage(W)
Power S/W On Sleep mode -
RGB, HDMI Off/Off Off Amber 1

- 14 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING
1. No Power
Check L800 All
Voltage Level (19V)
Check Power connector
OK ? Replace Adapter
N N
Check IC802 output
Voltage Level (5V)
Replace IC802 &
Recheck
N
Check IC2602 Output
Voltage Level (3.3V_ST) Replace IC2602
N
Y
Check IC806 Output
Voltage Level (1.24V)
Replace IC806 &
Recheck
N
Y
Y
Check IC810 Output
Voltage Level (2.5V)
Replace IC810 &
Recheck
N
Y
Check IC807 Output
Voltage Level (1.5V)
Replace IC807 &
Recheck
N
Y
Check X201 Clock
24MHz Replace X201
N
Replace IC100 Flash Memory
Y
Y

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Only for training and service purposes
2. No Picture
Module
Back Light On ?
Check WLED_ENABLE high
R1127
Check IC101
Replace Main Scaler IC
N N
Check Panel clock
P1002(#10,11,22,23)
Check IC101
Repair Main B/D
N
Check Panel power
P1002(#1,2,3) 5V
IC802 Output 5V
Replace IC802
N
Y
Replace T-con
Board or module
Check FFC Cable for damage
or open conductors. Replace Cable
N
Y
Y
Y
Check LED Driver output
(P1101/P1103 #1,2,5,6)
Check LED Driver IC1100
Replace LED Driver IC
N
Y

- 16 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3. No Video-TV
Check Tuner(TU2601 or 02 or 03)
SIF #6 CVBS #8
Replace Tuner(TU2601 or 02 or 03)
Recheck
N
Y
Check RF Cable
Y
1. Check Tuner(TU2601 or 02 or 03 #5) Power (3.3V)
2. Check IC803 Output voltage(3.3V)
Replace IC803
Y
N
Check Tuner(TU2601 or 02 or 03) I2C Signal
SCL(R2609), SDA(R2610)
Check IC101
N
1. Check Tuner(TU2601 or 02 or 03 #7) Power (1.8V)
2. Check IC805 Output voltage(1.8V)
For TU2601, check #13 Power (1.23V) and IC806 also
Replace IC805
Replace IC806
Y
N
Check Tuner(TU2601 or 02 or 03) I2C Signal
SCL(R2609), SDA(R2610)
Check IC101
N
Y

- 17 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3. No Video - TV
Check Tuner(TU2601 or 02 or 03)
SIF #6 CVBS #8
Replace Tuner(TU2601 or 02 or 03)
Recheck
N
Y
Check RF Cable
Y
1. Check Tuner(TU2601 or 02 or 03 #5) Power (3.3V)
2. Check IC803 Output voltage(3.3V)
Replace IC803
Y
N
Check Tuner(TU2601 or 02 or 03) I2C Signal
SCL(R2609), SDA(R2610)
Check IC101
N
1. Check Tuner(TU2601 or 02 or 03 #7) Power (1.8V)
2. Check IC805 Output voltage(1.8V)
For TU2601, check #13 Power (1.23V) and IC806 also
Replace IC805
Replace IC806
Y
N
Check Tuner(TU2601 or 02 or 03) I2C Signal
SCL(R2609), SDA(R2610)
Check IC101
N
Y

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Only for training and service purposes
4. No Video - Component
Check input signal format
Is it supported?
Check signal
R239,R237,R241
C220,C218,C222
Replace R239,R237,R241
C220,C218,C222
Y
N
Check JK400 Replace JK400 or
Check Device
Y
N
Y
IC101 has problem
Y
Check Component Cable
Wave form of C220 Wave form of C218 Wave form of C222
Wave form of Comp Y Wave form of Comp Pb Wave form of Comp Pr

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Only for training and service purposes
5. No Video - RGB
Check input signal format
Is it supported?
Check Hsync, Vsync
R4024, R4025 Replace R4024, R4025
Check signal RGB
R228,R230,R232
C204,C206,C208
N
Check P400 Replace P400 or
Check Device
Y
N
Y
Replace R228,R230,R232
C204,C206,C208
N
IC101 has problem
Y
Check RGB Cable
Wave form of R4025(Vsync) Wave form of R4024(Hsync)
Wave form of R230/C206
Wave form of R228/C204 Wave form of R232/C208
Y
Y

- 20 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
6. No Video - HDMI
Check input signal format
Is it supported?
Y
Check JK600/JK601
for proper connection or damage Replace connector
Y
N
Y
Check HDMI Cable for damage
or open connector
Check I2C Signal (JK600/601)
(#15, #16) Re download EDID data
Y
N
Check HDCP Key (IC101) Replace Scaler(IC101)
N