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LED LCD TV
SERVICE MANUAL
CHASSIS : LD21C
MODEL: 42LS3400/340S/340T/3450
MODEL: 42LS3400/340S/340T/3450-ZC
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67360728 (1203-REV00) Printed in Korea
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SERVICING PRECAUTIONS ................................................................... 4
SPECIFICATION ...................................................................................... 6
ADJUSTMENT INSTRUCTION ............................................................. 11
BLOCK DIAGRAM ................................................................................. 16
EXPLODED VIEW .................................................................................. 19
SCHEMATIC CIRCUIT DIAGRAM ..............................................................
Copyright © LG Electronics. Inc. All rights reserved. -2- LGE Internal Use Only
Only for training and service purposes
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
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 Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC Do not use a line Isolation Transformer during this check.
power line. Use a transformer of adequate power rating as this Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
protects the technician from accidents resulting in personal injury between a known good earth ground (Water Pipe, Conduit, etc.)
from electrical shocks. and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
It will also protect the receiver and it's components from being with 1000 ohms/volt or more sensitivity.
damaged by accidental shorts of the circuitry that may be Reverse plug the AC cord into the AC outlet and repeat AC voltage
inadvertently introduced during the service operation. measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
If any fuse (or Fusible Resistor) in this TV receiver is blown, 0.5 mA.
replace it with the specified. In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
When replacing a high wattage resistor (Oxide Metal Film Resistor, repaired before it is returned to the customer.
over 1 W), keep the resistor 10 mm away from PCB.
Leakage Current Hot Check circuit
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 M and 5.2 M.
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.
Copyright © LG Electronics. Inc. All rights reserved. -3- LGE Internal Use Only
Only for training and service purposes
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service 2. After removing an electrical assembly equipped with ES
manual and its supplements and addenda, read and follow the devices, place the assembly on a conductive surface such as
SAFETY PRECAUTIONS on page 3 of this publication. aluminum foil, to prevent electrostatic charge buildup or expo-
NOTE: If unforeseen circumstances create conflict between the sure of the assembly.
following servicing precautions and any of the safety precautions 3. Use only a grounded-tip soldering iron to solder or unsolder ES
on page 3 of this publication, always follow the safety precautions. devices.
Remember: Safety First. 4. Use only an anti-static type solder removal device. Some solder
removal devices not classified as "anti-static" can generate
General Servicing Precautions electrical charges sufficient to damage ES devices.
1. Always unplug the receiver AC power cord from the AC power 5. Do not use freon-propelled chemicals. These can generate
source before; electrical charges sufficient to damage ES devices.
a. Removing or reinstalling any component, circuit board mod- 6. Do not remove a replacement ES device from its protective
ule or any other receiver assembly. package until immediately before you are ready to install it.
b. Disconnecting or reconnecting any receiver electrical plug or (Most replacement ES devices are packaged with leads electri-
other electrical connection. cally shorted together by conductive foam, aluminum foil or
c. Connecting a test substitute in parallel with an electrolytic comparable conductive material).
capacitor in the receiver. 7. Immediately before removing the protective material from the
CAUTION: A wrong part substitution or incorrect polarity leads of a replacement ES device, touch the protective material
installation of electrolytic capacitors may result in an explo- to the chassis or circuit assembly into which the device will be
sion hazard. installed.
2. Test high voltage only by measuring it with an appropriate CAUTION: Be sure no power is applied to the chassis or circuit,
high voltage meter or other voltage measuring device (DVM, and observe all other safety precautions.
FETVOM, etc) equipped with a suitable high voltage probe. 8. Minimize bodily motions when handling unpackaged replace-
Do not test high voltage by "drawing an arc". ment ES devices. (Otherwise harmless motion such as the
3. Do not spray chemicals on or near this receiver or any of its brushing together of your clothes fabric or the lifting of your
assemblies. foot from a carpeted floor can generate static electricity suf-
4. Unless specified otherwise in this service manual, clean ficient to damage an ES device.)
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable General Soldering Guidelines
non-abrasive applicator; 10 % (by volume) Acetone and 90 % 1. Use a grounded-tip, low-wattage soldering iron and appropriate
(by volume) isopropyl alcohol (90 % - 99 % strength) tip size and shape that will maintain tip temperature within the
CAUTION: This is a flammable mixture. range or 500 °F to 600 °F.
Unless specified otherwise in this service manual, lubrication of 2. Use an appropriate gauge of RMA resin-core solder composed
contacts in not required. of 60 parts tin/40 parts lead.
5. Do not defeat any plug/socket B+ voltage interlocks with which 3. Keep the soldering iron tip clean and well tinned.
receivers covered by this service manual might be equipped. 4. Thoroughly clean the surfaces to be soldered. Use a mall wire-
6. Do not apply AC power to this instrument and/or any of its bristle (0.5 inch, or 1.25 cm) brush with a metal handle.
electrical assemblies unless all solid-state device heat sinks are Do not use freon-propelled spray-on cleaners.
correctly installed. 5. Use the following unsoldering technique
7. Always connect the test receiver ground lead to the receiver a. Allow the soldering iron tip to reach normal temperature.
chassis ground before connecting the test receiver positive (500 °F to 600 °F)
lead. b. Heat the component lead until the solder melts.
Always remove the test receiver ground lead last. c. Quickly draw the melted solder with an anti-static, suction-
8. Use with this receiver only the test fixtures specified in this type solder removal device or with solder braid.
service manual. CAUTION: Work quickly to avoid overheating the circuit
CAUTION: Do not connect the test fixture ground strap to any board printed foil.
heat sink in this receiver. 6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
Electrostatically Sensitive (ES) Devices (500 °F to 600 °F)
Some semiconductor (solid-state) devices can be damaged eas- b. First, hold the soldering iron tip and solder the strand against
ily by static electricity. Such components commonly are called the component lead until the solder melts.
Electrostatically Sensitive (ES) Devices. Examples of typical ES c. Quickly move the soldering iron tip to the junction of the
devices are integrated circuits and some field-effect transistors component lead and the printed circuit foil, and hold it there
and semiconductor "chip" components. The following techniques only until the solder flows onto and around both the compo-
should be used to help reduce the incidence of component dam- nent lead and the foil.
age caused by static by static electricity. CAUTION: Work quickly to avoid overheating the circuit
1. Immediately before handling any semiconductor component or board printed foil.
semiconductor-equipped assembly, drain off any electrostatic d. Closely inspect the solder area and remove any excess or
charge on your body by touching a known earth ground. Alter- splashed solder with a small wire-bristle brush.
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.
Copyright © LG Electronics. Inc. All rights reserved. -4- LGE Internal Use Only
Only for training and service purposes
IC Remove/Replacement 3. Solder the connections.
Some chassis circuit boards have slotted holes (oblong) through CAUTION: Maintain original spacing between the replaced
which the IC leads are inserted and then bent flat against the cir- component and adjacent components and the circuit board to
cuit foil. When holes are the slotted type, the following technique prevent excessive component temperatures.
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique Circuit Board Foil Repair
as outlined in paragraphs 5 and 6 above. Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
Removal board causing the foil to separate from or "lift-off" the board. The
1. Desolder and straighten each IC lead in one operation by following guidelines and procedures should be followed whenever
gently prying up on the lead with the soldering iron tip as the this condition is encountered.
solder melts.
2. Draw away the melted solder with an anti-static suction-type At IC Connections
solder removal device (or with solder braid) before removing To repair a defective copper pattern at IC connections use the
the IC. following procedure to install a jumper wire on the copper pattern
Replacement side of the circuit board. (Use this technique only on IC connec-
1. Carefully insert the replacement IC in the circuit board. tions).
2. Carefully bend each IC lead against the circuit foil pad and
solder it. 1. Carefully remove the damaged copper pattern with a sharp
3. Clean the soldered areas with a small wire-bristle brush. knife. (Remove only as much copper as absolutely necessary).
(It is not necessary to reapply acrylic coating to the areas). 2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
"Small-Signal" Discrete Transistor 3. Bend a small "U" in one end of a small gauge jumper wire and
Removal/Replacement carefully crimp it around the IC pin. Solder the IC connection.
1. Remove the defective transistor by clipping its leads as close 4. Route the jumper wire along the path of the out-away copper
as possible to the component body. pattern and let it overlap the previously scraped end of the
2. Bend into a "U" shape the end of each of three leads remaining good copper pattern. Solder the overlapped area and clip off
on the circuit board. any excess jumper wire.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding At Other Connections
leads extending from the circuit board and crimp the "U" with Use the following technique to repair the defective copper pattern
long nose pliers to insure metal to metal contact then solder at connections other than IC Pins. This technique involves the
each connection. installation of a jumper wire on the component side of the circuit
board.
Power Output, Transistor Device
Removal/Replacement 1. Remove the defective copper pattern with a sharp knife.
1. Heat and remove all solder from around the transistor leads. Remove at least 1/4 inch of copper, to ensure that a hazardous
2. Remove the heat sink mounting screw (if so equipped). condition will not exist if the jumper wire opens.
3. Carefully remove the transistor from the heat sink of the circuit 2. Trace along the copper pattern from both sides of the pattern
board. break and locate the nearest component that is directly con-
4. Insert new transistor in the circuit board. nected to the affected copper pattern.
5. Solder each transistor lead, and clip off excess lead. 3. Connect insulated 20-gauge jumper wire from the lead of the
6. Replace heat sink. nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Diode Removal/Replacement Carefully crimp and solder the connections.
1. Remove defective diode by clipping its leads as close as pos- CAUTION: Be sure the insulated jumper wire is dressed so the
sible to diode body. it does not touch components or sharp edges.
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.
Copyright © LG Electronics. Inc. All rights reserved. -5- LGE Internal Use Only
Only for training and service purposes
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application range 3. Test method
This specification is applied to the LCD TV used LD21C 1) Performance: LGE TV test method followed
chassis. 2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC
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.
4. Model General Specification
No. Item Specification Remarks
1 Market EU(PAL Market-37Countries) DTV & Analog (Total 37 countries)
DTV (MPEG2/4, DVB-T) :37 countries
UK/Italy/Germany/France/Spain/Sweden/Finland/Nether-
lands/ Belgium/Luxemburg/ Greece/Denmark/Czech/
Austria /Hungary/Swiss/Croatia/Turkey
Norway/Slovenia/Poland/Ukraine/Portugal/Ireland/Morocco/
Latvia/Estonia/Lithania/Rumania/Bulgaria/Russia/Slovakia
Bosnia/Serbia/Albania/Kazakhstan/Belarus
DTV (MPEG2/4, DVB-T2): 8 countries
UK/Denmark/Sweden/Finland/Norway/Ireland/Ukraine/
Kazakhstan
DTV (MPEG2/4, DVB-C): 37 countries
UK/Italy/Germany/France/Spain/Sweden/Finland/Nether-
lands/ Belgium/Luxemburg/ Greece/Denmark/Czech/
Austria /Hungary/Swiss/Croatia/Turkey
Norway/Slovenia/Poland/Ukraine/Portugal/Ireland/Morocco/
Latvia/Estonia/Lithania/Rumania/Bulgaria/Russia/Slovakia
Bosnia/Serbia/Albania/Kazakhstan/Belarus
DTV (MPEG2/4,DVB-S): 29 countries
Italy/Germany/France/Spain/Netherlands/ Belgium/
Luxemburg/ Greece/ Czech/Austria /Hungary/Swiss/
Croatia/
Turkey/Slovenia/Poland/Portugal/ Morocco/Latvia/
Estonia/Lithania/Rumania/Bulgaria/Russia/Slovakia
Bosnia/Serbia/Albania/ Belarus
Supported satellite : 22 satellites
HISPASAT 1C/1D, ATLANTIC BIRD 2, NILESAT 101/102,
ATLANTIC BIRD 3, AMOS 2/3, THOR 5/6, IRIUS 4,
EUTELSAT-W3A, EUROBIRD 9A, EUTELSAT-W2A,
HOTBIRD 6/8/9, EUTELSAT-SESAT, ASTRA 1L/H/M/
KR, ASTRA 3A/3B, BADR 4/6, ASTRA 2D, EUROBIRD 3,
EUTELSAT-W7, HELLASSAT 2, EXPRESS AM1, TURK-
SAT 2A/3A, INTERSAT10
Copyright © LG Electronics. Inc. All rights reserved. -6- LGE Internal Use Only
Only for training and service purposes
No. Item Specification Remarks
1) PAL-BG
2) PAL-DK
2 Broadcasting system 3) PAL-I/I'
4) SECAM L/L'
5) DVB-T/T2/C/S
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
Analog : Upper Heterodyne
16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
3 Receiving system Digital : COFDM, QAM
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
DVB-S/S2
- symbolrate
DVB-S2 (8PSK / QPSK) : 2 ~ 45Msymbol/s
DVB-S (QPSK) : 2 ~ 45Msymbol/s
- viterbi
DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8
DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10
4 Scart Jack (1EA) PAL, SECAM Scart 1 Jack is Full scart and support RF-OUT(analog).
5 Video Input RCA(1EA) PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60
Y/Cb/Cr
6 Component Input (1EA)
Y/Pb/Pr
Analog(D-SUB 15PIN)
7 RGB Input RGB-PC
Some models (LD21A,LD21C) are not supported.
HDMI1-DTV/DVI PC(HDMI version 1.3)
8 HDMI Input (3EA) HDMI2-DTV Support HDCP
HDMI3-DTV The number of Input ports is different by model.
In case of the RGB/DVI Audio input,
RGB/DVI Audio
9 Audio Input (2EA) Some models(LD21A,LD21C) are not supported.
Component & AV
Component & AV's audio input is used by common port.
10 SDPIF out (1EA) SPDIF out Some models(LD21A,LD21C) are not supported.
Antenna, AV1, AV2, Component, RGB,
11 Earphone out (1EA) Some models(LD21A,LD21C) are not supported.
HDMI1, HDMI2, HDMI3
EMF, JPEG, MP3, DivX HD
12 USB (1EA or 2EA) DivX HD, LM58, CM96: 2EA
For SVC (download) LS56, LS35, CS46, LS,34, LM34 : 1EA
CI : UK, Finland, Denmark, Norway, Sweden, Russia,
DVB-T Spain, Ireland, Luxemburg, Belgium, Netherland
CI+ : France(Canal+), Italy(DGTVi)
13 DVB CI : Switzerland, Austria, Slovenia, Hungary, Bulgaria
DVB-C CI+ : Switzerland(UPC,Cablecom), Netherland(Ziggo),
Germany(KDG,CWB), Finland(labwise)
DVB-S CI + : Germany(Astra HD+ )
14 Ethernet (1EA) DLNA(Wired, DMP only) Some models (LD21A,LD21C) are not supported.
Copyright © LG Electronics. Inc. All rights reserved. -7- LGE Internal Use Only
Only for training and service purposes
5. Video resolutions (2D)
5.1. Component Input (Y, CB/PB, CR/PR)
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed
1 720*576 15.625 50.00 13.5 SDTV ,DVD 576I
2 720*480 15.73 60.00 13.5135 SDTV ,DVD 480I
3 720*480 15.73 59.94 13.50 SDTV ,DVD 480I
4 720*576 31.25 50.00 27.00 SDTV 576P
5 720*480 31.50 60.00 27.027 SDTV 480P
6 720*480 31.47 59.94 27.00 SDTV 480P
7 1280*720 37.50 50.00 74.25 HDTV 720P
8 1280*720 45.00 60.00 74.25 HDTV 720P
9 1280*720 44.96 59.94 74.176 HDTV 720P
10 1920*1080 28.125 50.00 74.25 HDTV 1080I
11 1920*1080 33.75 60.00 74.25 HDTV 1080I
12 1920*1080 33.72 59.94 74.176 HDTV 1080I
13 1920*1080 56.25 50.00 148.50 HDTV 1080P
14 1920*1080 67.50 60.00 148.50 HDTV 1080P
15 1920*1080 67.432 59.94 148.352 HDTV 1080P
16 1920*1080 27.00 24.00 74.25 HDTV 1080P
17 1920*1080 26.97 23.94 74.176 HDTV 1080P
18 1920*1080 33.75 30.00 74.25 HDTV 1080P
19 1920*1080 33.71 29.97 74.176 HDTV 1080P
5.2. RGB Input (PC) - LS35/LS34/CS46 series models are not supported.
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed DDC
1 640*350 31.468 70.09 25.17 EGA X
2 720*400 31.469 70.08 28.32 DOS O
3 640*480 31.469 59.94 25.17 VESA(VGA) O
4 800*600 37.879 60.31 40.00 VESA(SVGA) O
5 1024*768 48.363 60.00 65.00 VESA(XGA) O
6 1152*864 54.348 60.053 80.00 VESA O
7 1360*768 47.712 60.015 85.50 VESA (WXGA) O
8 1920*1080 67.5 60 148.5 HDTV 1080P O
Copyright © LG Electronics. Inc. All rights reserved. -8- LGE Internal Use Only
Only for training and service purposes
5.3. HDMI Input(PC/DTV)
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
PC(DVI) DDC
1 640*350 31.468 70.09 25.17 EGA X
2 720*400 31.469 70.08 28.32 DOS O
3 640*480 31.469 59.94 25.17 VESA(VGA) O
4 800*600 37.879 60.31 40.00 VESA(SVGA) O
5 1024*768 48.363 60.00 65.00 VESA(XGA) O
6 1152*864 54.348 60.053 80.00 VESA O
7 1360*768 47.712 60.015 85.50 VESA (WXGA) O
8 1280*1024 63.981 60.020 108.0 VESA (SXGA) O FHD only
9 1920*1080 67.50 60.00 148.5 HDTV 1080P O FHD only
DTV
1 720*480 31.47 59.94 27.00 SDTV 480P
2 720*480 31.50 60.00 27.027 SDTV 480P
3 720*576 31.250 50.00 27.00 SDTV 576P
4 1280*720 37.50 50.00 74.25 HDTV 720P
5 1280*720 45.00 60.00 74.25 HDTV 720P
6 1280*720 44.96 59.94 74.176 HDTV 720P
7 1920*1080 28.125 50.00 74.25 HDTV 1080I
8 1920*1080 33.75 60.00 74.25 HDTV 1080I
9 1920*1080 33.72 59.94 74.176 HDTV 1080I
10 1920*1080 56.250 50.00 148.50 HDTV 1080P
11 1920*1080 67.50 60.00 148.50 HDTV 1080P
12 1920*1080 67.432 59.94 148.352 HDTV 1080P
13 1920*1080 27.00 24.00 74.25 HDTV 1080P
14 1920*1080 26.97 23.976 74.176 HDTV 1080P
15 1920*1080 33.75 30.00 74.25 HDTV 1080P
Copyright © LG Electronics. Inc. All rights reserved. -9- LGE Internal Use Only
Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application Range (4) Click "Connect" tab. If "Can't" is displayed, check connection
between computer, jig, and set.
This specification sheet is applied to all of the LCD TV with
LD21C chassis.
(2) (3)
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) Please Check the Speed :
Temperature : at 25 °C ± 5 °C To use speed between
Relative humidity : 65 ± 10 % from 200KHz to 400KHz
Input voltage : 220 V, 60 Hz
(6) Adjustment equipments: Color Analyzer(CA-210 or CA-110), (5) Click "Auto" tab and set as below.
DDC Adjustment Jig, Service remote control. (6) Click "Run".
(7) Push the "IN STOP" key - For memory initialization. (7) After downloading, check "OK" message.
Case1 : Software version up
(4)
1. After downloading S/W by USB , TV set will reboot
automatically. filexxx.bin
2. Push "In-stop" key. (5)
3. Push "Power on" key.
4. Function inspection
5. After function inspection, Push "In-stop" key. (7)...........OK
Case2 : Function check at the assembly line
1. When TV set is entering on the assembly line, Push
"In-stop" key at first. (6)
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.
* USB DOWNLOAD
(1) Put the USB Stick to the USB socket.
(2) Automatically detecting update file in USB Stick.
3. Main PCB check process - If your downloaded program version in USB Stick is Low,
APC - After Manual-Insert, executing APC it didn't work. But your downloaded version is High, USB
data is automatically detecting.
(3) Show the message "Copying files from memory".
* Boot file Download (4) Updating is starting.
(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 "Error" is displayed, check connection between computer,
jig, and set.
(3) Click "Read" tab, and then load download file(XXXX.bin)
by clicking "Read" (5) Updating Completed, The TV will restart automatically.
(6) If your TV is turned on, check your updated version and
(1) Tool option. (explain the Tool option, next stage)
* If downloading version is more high than your TV have, TV
filexxx.bin 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 "IN-START" key in service remote control.
(2) Select "Tool Option 1" and push "OK" key.
(3) Punch in the number. (Each model has their number)
Copyright © LG Electronics. Inc. All rights reserved. - 10 - LGE Internal Use Only
Only for training and service purposes
3.1. ADC Process 3.3. EDID data
(1) ADC (1) FHD RGB EDID data (RGB input : only LD21B support)
- Enter Service Mode by pushing "ADJ" key, 0 1 2 3 4 5 6 7 8 9 A B C D E F
- Enter Internal ADC mode by pushing "" key at "7. ADC 00 00 FF FF FF FF FF FF 00 1E 6D a b
Calibration". 10 c 01 03 68 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
EZ ADJUST ADC Calibration 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
0. Tool Option1 ADC Comp 480i NG 40 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
1. Tool Option2 ADC Comp 1080p NG 50 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
2. Tool Option3 ADC RGB NG 60 3E 1E 53 10 00 0A 20 20 20 20 20 20 d
3. Tool Option4
70 d 00 e
4. Tool Option 5 Start Reset
5. Country Group
6. Area Option (2) FHD HDMI EDID data
7. ADC Calibration
0 1 2 3 4 5 6 7 8 9 A B C D E F
8. White Balance
00 00 FF FF FF FF FF FF 00 1E 6D a b
9. 10 Point WB
10 c 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
10. Test Pattern
20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
11. EDID D/L 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
12. Sub B/C 40 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
13. Touch Sensitivity Setting 50 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 3E 1E 53 10 00 0A 20 20 20 20 20 20 d
Using "power on" key of the Adjustment remote 70 d 01 e
control, power on TV. 80 02 03
22 F1 4E 10 9F 04 13 05 14 03 02 12 20 21
90 22 15
01 26 15 07 50 09 57 07 f
* ADC Calibration Protocol (RS232) A0 f 01 1D 80 18 71 1C 16 20 58 2C 25 00 20 C2
NO Item CMD 1 CMD 2 Data 0 B0 31 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00
Enter Adjust When transfer the `Mode In', C0 20 C2 31 00 00 1E 02 3A 80 18 71 38 2D 40 58 2C
A A 0 0
Adjust MODE `Mode In' Carry the command. D0 45 00 A0 5A 00 00 00 1E 01 1D 00 BC 52 D0 1E 20
Automatically adjustment E0 B8 28 55 40 C4 8E 21 00 00 1E 00 00 00 00 00 00
ADC adjust ADC Adjust A D 1 0
(The use of a internal pattern) F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e
Adjust Sequence (3) Detail EDID Options are below
aa 00 00 [Enter Adjust Mode] a. Product ID
xb 00 40 [Component1 Input (480i)]
MODEL NAME HEX EDID Table DDC Function
ad 00 10 [Adjust 480i Comp1]
xb 00 60 [RGB Input (1024*768)] (only LD21B) HD/FHD Model 0001 01 00 Analog/Digital
ad 00 10 [Adjust 1024*768 RGB] (only LD21B)
aa 00 90 End Adjust mode b. Serial No: Controlled on production line.
* Required equipment : Adjustment remote control. c. Month, Year: Controlled on production line:
ex) Week : '01' -> '01'
3.2. EDID Download Year : '2012' -> '16' fix
After enter Service Mode by pushing "ADJ" key. d. Model Name(Hex):
Enter EDID D/L menu. cf) TV set's model name in EDID data is below.
Enter "START" by pushing "OK" key. Model name MODEL NAME(HEX)
Never connect HDMI && D-sub cable when EDID LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)
downloaded.
e. Checksum: Changeable by total EDID data.
EZ ADJUST EDID D/L
FHD(8 Bit)
0. Tool Option1 HDMI1 NG EDID C/S data
1. Tool Option2 HDMI2 NG HDMI RGB
2. Tool Option3 HDMI3 NG Block 0 43 5C
3. Tool Option4 RGB NG
Check sum 25 (HDMI1)
4. Tool Option 5 Start Reset
5. Country Group
(Hex) Block 1 15 (HDMI2) -
6. Area Option 05 (HDMI3)
7. ADC Calibration
8. White Balance f. Vendor Specific(HDMI)
9. 10 Point WB
Input Model name(HEX)
10. Test Pattern
11. EDID D/L HDMI1 67030C001000801E
12. Sub B/C
HDMI2 67030C002000801E
13. Touch Sensitivity Setting
HDMI3 67030C003000801E
Copyright © LG Electronics. Inc. All rights reserved. - 11 - LGE Internal Use Only
Only for training and service purposes
3.4 Function Check * Connecting picture of the measuring instrument
- Check display and sound (On Automatic control)
Check Input and Signal items. Inside PATTERN is used when W/B is controlled. Connect to
1) TV auto controller or push Adjustment R/C POWER ON
2) AV (SCART / CVBS) Enter the mode of White-Balance, the pattern will come out.
3) COMPONENT (480i)
4) RGB (PC : 1024 x 768 @ 60hz) (* RGB input : LD21B
only support) Full White Pattern CA-210
5) HDMI
6) PC Audio In (* except LD21A chassis model) COLOR
ANALYZER
* Display and Sound check is executed by Remote control. TYPE : CA-210
Not to push the INSTOP key after completion if the function RS-232C Communication
inspection.
* Auto-control interface and directions
(1) Adjust in the place where the influx of light like floodlight
4. Total Assembly line process around is blocked. (illumination is less than 10 lux).
4.1. Adjustment Preparation (2) Adhere closely the Color analyzer(CA210) to the module
W/B Equipment condition less than 10 cm distance, keep it with the surface of the
CA210 Module and Color analyzer's prove vertically.(80° ~ 100°).
: CCFL/EEFL -> CH9, Test signal: Inner pattern(80IRE) (3) Aging time
LED -> CH14, Test signal: Inner pattern(80IRE) - After aging start, keep the power on (no suspension of
If it is executed W/B adjustment in 2~3 minutes H/run, it is power supply) and heat-run over 5 minutes.
adjusted by Target data - Using 'no signal' or 'POWER ONLY' or the others, check
Mode Temp Coordinate spec Target the back light on.
X=0.269 (±0.002) X=0.271
Cool 13,000k Auto adjustment Map(using RS-232C to USB cable)
Y=0.273 (±0.002) Y=0.276
Inner pattern RS-232C COMMAND
X=0.285 (±0.002) X=0.287
Medium 9,300k (204gray, [CMD ID DATA]
Y=0.293 (±0.002) Y=0.296
80IRE) Wb 00 00 White Balance Start
X=0.313 (±0.002) X=0.315
Warm 6,500k Wb 00 ff White Balance End
Y=0.329 (±0.002) Y=0.332
RS-232C COMMAND CENTER
Edge LED W/B Table in process of time (LGD module & 65" [CMD ID DATA] MIN (DEFAULT) MAX
AUO module) Cool Mid Warm Cool Mid Warm
Aging Cool Medium Warm R Gain jg Ja jd 00 172 192 192 192
time X y x y x y
G Gain jh Jb je 00 172 192 192 192
(Min) 269 273 285 293 313 329
B Gain ji Jc jf 00 192 192 172 192
1 0-2 280 287 296 307 320 337
R Cut 64 64 64 128
2 3-5 279 285 295 305 319 335
3 6-9 277 284 293 304 317 334 G Cut 64 64 64 128
4 10-19 276 283 292 303 316 333 B Cut 64 64 64 128
5 20-35 274 280 290 300 314 330
6 36-49 272 277 288 297 312 327
Color Temperature : COOL, Medium, Warm.
7 50-79 271 275 287 295 311 325
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
8 80-119 270 274 286 294 310 324
adjust other two lower than C0.(When R/G/B Gain are all
9 Over 120 269 273 285 293 309 323 C0, it is the FULL Dynamic Range of Module)
Copyright © LG Electronics. Inc. All rights reserved. - 12 - LGE Internal Use Only
Only for training and service purposes
* Manual W/B process using adjust Remote control. 5. HI-POT Test
After enter Service Mode by pushing "ADJ" key,
Enter White Balance by pushing " " key at "8. White 5.1. HI-POT auto-check preparation
Balance". - Check the POWER cable and SIGNAL cable insertion condition
EZ ADJUST White Balance
Color Temp. Cool
5.2. HI-POT auto-check
0. Tool Option1
1. Tool Option2 R-Gain 172 (1) Pallet moves in the station. (POWER CORD / AV CORD is
2. Tool Option3 G-Gain 172 tightly inserted)
B-Gain 192
3. Tool Option4
R-Cut
(2) Connect the AV JACK Tester.
4. Tool Option5 64
5. Country Group G-Cut 64 (3) Controller (GWS103-4) on.
6. Area Option B-Cut 64 (4) HI-POT test (Auto)
7. ADC Calibration Test-Pattern ON
8. White Balance Backlight 100
- If Test is failed, Buzzer operates.
9. 10 Point WB Reset To Set - If Test is passed, GOOD Lamp on and move to next proc-
10. Test Pattern
ess automatically.
11. EDID D/L
12. Sub B/C
13. Touch Sensitivity Setting
5.3. Checkpoint
(1) Test voltage
* After you finished all adjustments, Press "In-start" key and
- Touchable Metal : 3KV / min at 100mA
compare Tool option and Area option value with its BOM, if
- SIGNAL : 3KV / min at 100mA
it is correctly same then unplug the AC cable. If it is not
(2) TEST time: 1 second. (case : mass production )
same, then correct it same with BOM and unplug AC cable.
(3) TEST POINT
For correct it to the model's module from factory Jig model.
- Touchable Metal => LIVE & NEUTRAL : Touchable Metal.
* Push the "IN STOP" key after completing the function
- SIGNAL => LIVE & NEUTRAL : SIGNAL.
inspection. And Mechanical Power Switch must be set
"ON".
4.2. EYE-Q function check 6. Model name & Serial number D/L
(1) Turn on TV. Press "Power on" key of service remote control.
(2) Press EYE key of Adjustment remote control. (Baud rate : 115200 bps)
Connect USB to RS232 Signal Cable to USB Jack.
(3) Cover the Eye Q II sensor on the front of the using your
Write Serial number.
hand and wait for 6 seconds.