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Internal Use Only
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LED TV
SERVICE MANUAL
CHASSIS : LD55T
MODEL : 32LF56** 32LF56**-Z*
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL68646105 (1503-REV00) Printed in Korea
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SERVICING PRECAUTIONS ................................................................... 4
SPECIFICATION ...................................................................................... 6
ADJUSTMENT INSTRUCTION ............................................................. 11
BLOCK DIAGRAM ................................................................................. 17
EXPLODED VIEW .................................................................................. 21
SCHEMATIC CIRCUIT DIAGRAM ........................................... APPENDIX
TROUBLE SHOOTING GUIDE ................................................ APPENDIX
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
on page 3 of this publication, always follow the safety precau- ES devices.
tions. Remember: Safety First. 4. Use only an anti-static type solder removal device. Some sol-
der 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 6. Do not remove a replacement ES device from its protective
module or any other receiver assembly. package until immediately before you are ready to install it.
b. Disconnecting or reconnecting any receiver electrical plug (Most replacement ES devices are packaged with leads elec-
or other electrical connection. trically 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 mate-
installation of electrolytic capacitors may result in an explo- rial to the chassis or circuit assembly into which the device will
sion hazard. be installed.
2. Test high voltage only by measuring it with an appropriate CAUTION: Be sure no power is applied to the chassis or cir-
high voltage meter or other voltage measuring device (DVM, cuit, 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 appropri-
(by volume) isopropyl alcohol (90 % - 99 % strength) ate tip size and shape that will maintain tip temperature within
CAUTION: This is a flammable mixture. the range or 500 °F to 600 °F.
Unless specified otherwise in this service manual, lubrication 2. Use an appropriate gauge of RMA resin-core solder composed
of 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 Do not use freon-propelled spray-on cleaners.
are 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
ily by static electricity. Such components commonly are called against 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 discharg-
ing wrist strap device, which should be removed to prevent
potential 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 when-
gently prying up on the lead with the soldering iron tip as the ever 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 remain- good copper pattern. Solder the overlapped area and clip off
ing 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 LED TV used LD55T 1) Performance: LGE TV test method followed
chassis. 2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC specification
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/Neth-
erlands/ Belgium/Luxemburg/ Greece/Denmark/Czech/
Austria /Hungary/Swiss/Croatia/TurkeyNorway/Slovenia/
Poland/Ukraine/Portugal/Ireland/Morocco/Latvia/Estonia/
Lithania/Rumania/Bulgaria/Russia/SlovakiaBosnia/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/Aus-
tria /Hungary/Swiss/Croatia/TurkeyNorway/Slovenia/Poland
/Ukraine/Portugal/Ireland/Morocco/Latvia/Estonia/Lithania/
Rumania/Bulgaria/Russia/SlovakiaBosnia/Serbia/Albania/
Kazakhstan/Belarus
DTV (MPEG2/4,DVB-S): 29 countries
Italy/Germany/France/Spain/Netherlands/ Belgium/Luxem-
burg/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
Analogue TV Analogue TV :
1) PAL-B/G/D/K/I (RF) VHF: E2 to E12, UHF : E21 to E69
2) SECAM-B/G/D/K/I, SECAM L/L' (CATV) S1 to S20, HYPER: S21 to S47
Digital TV Digital TV : VHF, UHF
1) DVB-T
2 Broadcasting system
2) DVB-C
Satellite Digital TV Satellite TV :
1) DVB-T/T2 VHF, UHF,
2) DVB-C C-Band, Ku-Band
3) DVB-S/S2
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
Scart 1 Jack is Full scart and support RF-OUT(analog). EU
4 Scart Jack (1EA) PAL, SECAM
only
Video Input RCA (PAL, SECAM,
Component & AV 4 System : PAL, SECAM, NTSC, PAL60
5 NTSC)
Common port (1EA)
Component Input (Y/Cb/Cr, Y/Pb/Pr)
6 HDMI Input (2EA) HDMI1/2-DTV Support HDCP
7 Audio Input (1EA) Component & AV Component & AV's audio input is used by common port.
8 SDPIF out (1EA) SPDIF out LF62/LF57/LF56/LF55 Series
Antenna, AV1, AV2, Component,
9 Earphone out (1EA) LF62/LF57/LF56 Series
HDMI1, HDMI2, USB
10 USB (1EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD
CI : UK, Finland, Denmark, Norway, Sweden, Russia, Spain,
DVB-T Ireland, Luxemburg, Belgium, Netherland
CI+ : France(Canal+), Italy(DGTVi)
11 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+ )
12 Ethernet (1EA) DLNA(Wired, DMP only) Only UK T2 Model (LF57/LF56/LF55/LF54) : for MHEG
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 28.12 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 67.43 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
Copyright © LG Electronics. Inc. All rights reserved. -8- LGE Internal Use Only
Only for training and service purposes
5.2. 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
1 640*480 31.46 59.94 25.125 SDTV 480P
2 640*480 31.50 60.00 25.125 SDTV 480P
3 720*480 31.47 59.94 27.00 SDTV 480P
4 720*480 31.50 60.00 27.027 SDTV 480P
5 720*576 31.25 50.00 27.00 SDTV 576P(DVB)
6 1280*720 37.50 50.00 74.25 HDTV 720P(DVB)
7 1280*720 45.00 60.00 74.25 HDTV 720P
8 1280*720 44.96 59.94 74.176 HDTV 720P
9 1920*1080 28.12 50.00 74.25 HDTV 1080I(DVB)
10 1920*1080 33.75 60.00 74.25 HDTV 1080I
11 1920*1080 33.72 59.94 74.176 HDTV 1080I
12 1920*1080 56.25 50.00 148.50 HDTV 1080P(DVB)
13 1920*1080 67.50 60.00 148.50 HDTV 1080P
14 1920*1080 67.43 59.94 148.35 HDTV 1080P
15 1920*1080 27.00 24.00 74.25 HDTV 1080P
16 1920*1080 26.97 23.97 74.175 HDTV 1080P
17 1920*1080 33.75 30.00 74.25 HDTV 1080P
18 1920*1080 33.71 29.97 74.175 HDTV 1080P
Copyright © LG Electronics. Inc. All rights reserved. -9- LGE Internal Use Only
Only for training and service purposes
6. Video resolutions (3D)
6.1. HDMI Input
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed 3D input proposed mode
1 1280*720 37.50 50 74.25 HDTV 720P Side by Side(half), Top and Bottom,
2 1280*720 45 60 74.25 HDTV 720P Side by Side(half), Top and Bottom,
3 1280*720 75 50 148.5 HDTV 720P Frame packing
4 1280*720 89.90 / 90 59.94 / 60 148.35/148.5 HDTV 720P Frame packing
5 1920*1080 28.12 50 74.25 HDTV 1080i Side by Side(half), Top and Bottom
6 1920*1080 33.70 60 74.25 HDTV 1080i Side by Side(half), Top and Bottom
7 1920*1080 27.00 24 74.25 HDTV 1080P Side by Side(half), Top and Bottom,
8 1920*1080 33.70 30 89.1 HDTV 1080P Side by Side(half), Top and Bottom
9 1920*1080 53.95 / 54 23.98 / 24 148.35/148.5 HDTV 1080P Frame packing
Side by Side(half), Top and bottom,
10 1920*1080 56.30 50 148.5 HDTV 1080P
Single frame sequential
Side by Side(half), Top and bottom,
11 1920*1080 67.50 60 148.5 HDTV 1080P
Single frame sequential
6.2. DTV Input
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode
1. 1280*720 37.500 50 74.25 HDTV 720P Side by Side, Top & Bottom
2. 1920*1080 28.125 50 74.25 HDTV 1080I Side by Side, Top & Bottom
6.3. USB Input
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode
Side by Side, Top & Bottom,JPS,
1. 1920*1080 33.75 30 74.25 HDTV 1080P
MPO(Photo)
6.4. 3D Input mode
No. Side by Side Top & Bottom Single Frame Sequential Frame Packing
1
Copyright © LG Electronics. Inc. All rights reserved. - 10 - 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 LED TV with
LD55T 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
filexxx.bin
automatically. (5)
2. Push "In-stop" key.
3. Push "Power on" key.
4. Function inspection (7)...........OK
5. After function inspection, Push "In-stop" key.
Case2 : Function check at the assembly line (6)
1. When TV set is entering on the assembly line, Push
"In-stop" key at first.
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.
- If your downloaded program version in USB Stick is Low,
it didn't work. But your downloaded version is High, USB
3. Main PCB check process data is automatically detecting.
APC - After Manual-Insert, executing APC (3) Show the message "Copying files from memory".
(4) Updating is starting.
* Boot file 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 "Error" is displayed, check connection between computer,
jig, and set. (5) Updating Completed, The TV will restart automatically in 5
(3) Click "Read" tab, and then load download file(XXXX.bin) seconds.
by clicking "Read". (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 new than your TV have, TV
can lost all channel data. In this case, you have to channel
filexxx.bin 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)
(4) Completed selecting Tool option.
Copyright © LG Electronics. Inc. All rights reserved. - 11 - LGE Internal Use Only
Only for training and service purposes
3.1. ADC Process(Optional) 3.3. EDID data
* If ADC processes as OTP, There is no need to proceed (1) 2D HD Model HDMI EDID data
internal ADC. 0 1 2 3 4 5 6 7 8 9 A B C D E F
- Enter Service Mode by pushing "ADJ" key, 00 00 FF FF FF FF FF FF 00 1E 6D a b
- Enter Internal ADC mode by pushing "" key at "8. ADC 10 c 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
Calibration". 20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 01 01
EZ ADJUST 30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
ADC Calibration
40 36 00 40 84 63 00 00 1E 64 19 00 40 41 00 26 30
0. Tool Option1 ADC Comp 480i OK 50 18 88 36 00 40 84 63 00 00 18 00 00 00 FD 00 3A
1. Tool Option2 ADC Comp 1080p OK
2. Tool Option3 60 3E 1E 53 10 00 0A 20 20 20 20 20 20 d
ADC Type OTP
3. Tool Option4 70 d 01 e
4. Tool Option5 Start Reset
80 02 03 22 F1 4E 10 1F 04 93 05 14 03 02 12 20 21
5. Tool Option6
6. Country Group 90 22 15 01 26 15 07 50 09 57 07 f
7. Area Option A0 f 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A
8.ADC Calibration B0 00 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00
9. White Balance
10. 10 Point WB C0 20 C2 31 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E
11. Test Pattern D0 96 00 A0 5A 00 00 00 18 02 3A 80 18 71 38 2D 40
12 EDID D/L E0 58 2C 45 00 A0 5A 00 00 00 1E 00 00 00 00 00 00
13. Sub B/C
14. Ext. Input Adjust F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e
Using "P-ONLY" key of the Adjustment remote (2) 2D FHD Model HDMI EDID data
control, power on TV. 0 1 2 3 4 5 6 7 8 9 A B C D E F
00 00 FF FF FF FF FF FF 00 1E 6D a b
* ADC Calibration Protocol (RS232) 10 c 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
No. Item CMD 1 CMD 2 Data 0 20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
Enter Adjust Adjust When transfer the `Mode In', 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
A A 0 0
MODE `Mode In' Carry the command. 40 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
ADC Automatically adjustment 50 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
ADC adjust A D 1 0
Adjust (The use of a internal pattern) 60 3E 1E 53 10 00 0A 20 20 20 20 20 20 d
70 d 01 e
Adjust Sequence
80 02 03 22 F1 4E 10 9F 04 13 05 14 03 02 12 20 21
aa 00 00 [Enter Adjust Mode]
90 22 15 01 26 15 07 50 09 57 07 f
xb 00 40 [Component Input]
A0 f 01 1D 80 18 71 1C 16 20 58 2C 25 00 20 C2
ad 00 10 [Adjust 480i & 1080p Comp] B0 31 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00
aa 00 90 End Adjust mode C0 20 C2 31 00 00 1E 02 3A 80 18 71 38 2D 40 58 2C
* Required equipment : Adjustment remote control. D0 45 00 A0 5A 00 00 00 1E 01 1D 00 BC 52 D0 1E 20
E0 B8 28 55 40 C4 8E 21 00 00 1E 00 00 00 00 00 00
3.2. EDID Download F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e
After enter Service Mode by pushing "ADJ" key.
Enter EDID D/L menu. (3) Detail EDID Options are below
Enter "START" by pushing "OK" key. a. Product ID
EZ ADJUST EDID D/L MODEL NAME HEX EDID Table DDC Function
0. Tool Option1 HDMI1 NG
HD/FHD Model 0001 01 00 Analog/Digital
1. Tool Option2
HDMI2 NG
2. Tool Option3
3. Tool Option4
b. Serial No: Controlled on production line.
Start Reset
4. Tool Option5 c. Month, Year:
5. Tool Option6
6. Country Group ex) Week : '01' -> '01', Year : '2015' -> '19' fix
7. Area Option
8. ADC Calibration
d. Model Name(Hex):
9. White Balance cf) TV set's model name in EDID data is below.
10. 10 Point WB
11. Test Pattern Model name MODEL NAME(HEX)
12. EDID D/L
13. Sub B/C LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)
14. Ext. Input Adjust
Never connect HDMI cable when EDID downloaded. e. Checksum: Changeable by total EDID data.
HD FHD
EDID C/S data
HDMI HDMI
Block 0 74 40
Check sum
5B (HDMI1) 25 (HDMI1)
(Hex) Block 1
4B (HDMI2) 15 (HDMI2)
f. Vendor Specific(HDMI)
INPUT Model name(HEX)
HDMI1 67 03 0C 00 10 00 80 1E
HDMI2 67 03 0C 00 20 00 80 1E
Copyright © LG Electronics. Inc. All rights reserved. - 12 - LGE Internal Use Only
Only for training and service purposes
3.4. Function Check Aging chamber(LGD/CMI)
- Check display and sound Cool Medium Warm
Check Input and Signal items. Aging time
NetCase4 x y x y x y
1) TV (Min)
271 270 285 293 313 329
2) AV (SCART / CVBS) 1 0-5 280 285 294 308 319 340
3) COMPONENT (480i)
2 6-10 276 280 290 303 315 335
4) HDMI
* Display and Sound check is executed by Remote control. 3 11-20 272 275 286 298 311 330
4 21-30 269 272 283 295 308 327
5 31-40 267 268 281 291 306 323
Not to push the INSTOP key after completion if the function 6 41-50 266 265 280 288 305 320
inspection. 7 51-80 265 263 279 286 304 318
8 81-119 264 261 278 284 303 316
9 Over 120 264 260 278 283 303 315
4. Total Assembly line process
4.1. White Balance adjustment Use only AUO/Sharp/CSOT(Cool temp Spec is 13000 K)
W/B Equipment condition Cool Medium Warm
CA210 : LED CH14, Test signal: Inner pattern(80IRE) x y x y x y
Above 5 minutes H/run in the inner pattern. ("power on" key spec 271 270 286 289 313 329
of adjust remote control) target 278 280 293 299 320 339
If it is executed W/B adjustment in 2~3 minutes H/run, it is
adjusted by Target data.
W/B information
Mode Temp Coordinate spec Target
Model information W/B information
X=0.271 (± 0.002) X=0.278
Cool 13,000 K Model Module Panel Backlight Type Using W/B table
Y=0.270 (± 0.002) Y=0.280
X=0.286 (± 0.002) X=0.293 All All All Direct LED O
Medium 9,300 K
Y=0.289 (± 0.002) Y=0.299
X=0.313 (± 0.002) X=0.320 * Connecting picture of the measuring instrument
Warm 6,500 K
Y=0.329 (± 0.002) Y=0.339 (On Automatic control)
Normal line(LGD/CMI, March ~ December for Gumi, Global) Inside PATTERN is used when W/B is controlled. Connect to
Cool Medium Warm auto controller or push Adjustment R/C P-ONLY Enter the
Aging time mode of White-Balance, the pattern will come out.
NetCase5 x y x y x y
(Min)
271 270 286 289 313 329
1 0-2 282 289 297 308 324 348
Full White Pattern
2 3-5 281 287 296 306 323 346 CA-210
3 6-9 279 284 294 303 321 343 COLOR
ANALYZER
4 10-19 277 280 292 299 319 339 TYPE : CA-210
5 20-35 275 277 290 296 317 336
6 36-49 274 274 289 293 316 333
RS-232C Communication
7 50-79 273 272 288 291 315 331
8 80-119 272 271 287 290 314 330
9 Over 120 271 270 286 289 313 329
* Auto-control interface and directions
Normal line(LGD/CMI, January ~ February for Gumi, Apply (1) Adjust in the place where the influx of light like floodlight
not Cinema Screen) around is blocked. (illumination is less than 10 lux).
Cool Medium Warm (2) Adhere closely the Color analyzer(CA210) to the module
Aging time less than 10 cm distance, keep it with the surface of the
NetCase5 x y x y x y
(Min) Module and Color analyzer's prove vertically.(80° ~ 100°).
271 270 286 289 313 329
(3) Aging time
1 0-2 286 295 301 314 328 354 - After aging start, keep the power on (no suspension of
2 3-5 284 290 299 309 326 349 power supply) and heat-run over 5 minutes.
3 6-9 282 287 297 306 324 346 - Using 'no signal' or 'POWER ONLY' or the others, check
4 10-19 279 283 294 302 321 342 the back light on.
5 20-35 276 278 291 297 318 337
6 36-49 274 275 289 294 316 334
7 50-79 273 272 288 291 3