Page 1
Internal Use Only
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
LED TV
SERVICE MANUAL
CHASSIS : LD55T
MODEL : 49LF620V 49LF620V-ZB
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Printed in KoreaP/NO : MFL68646113 (1503-REV00)
Page 2
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
Only for training and service purposes
- 2 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 3
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
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
Only for training and service purposes
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LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 4
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 conict between the
following servicing precautions and any of the safety precautions
on page 3 of this publication, always follow the safety precautions. Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug
or other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an explosion hazard.
2. Test high voltage only by measuring it with an appropriate
high voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specied 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 specied 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 specied 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 easily 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 damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent
potential shock reasons prior to applying power to the unit
under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static type solder removal device. Some sol-
der removal devices not classied as “anti-static” can generate
electrical charges sufcient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufcient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or
comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will
be installed.
CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your
foot from a carpeted oor can generate static electricity sufcient 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 wirebristle (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 component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.
Only for training and service purposes
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LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 5
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent at against the circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by
gently prying up on the lead with the soldering iron tip as the
solder melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing
the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close
as possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and
if necessary, apply additional solder.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. Carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the
good copper pattern. Solder the overlapped area and clip off
any excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the
lead of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.
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.
Only for training and service purposes
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LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 6
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement
.
1. Application range
This specification is applied to the LED TV used LD55T
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 specification
4. Model General Specification
No. Item Specication 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/Netherlands/ 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/Netherlands/ 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-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, TURKSAT 2A/3A, INTERSAT10
Only for training and service purposes
- 6 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 7
No. Item Specication Remarks
Analogue TV
1) PAL-B/G/D/K/I
2) SECAM-B/G/D/K/I, SECAM L/L’
Analogue TV :
(RF) VHF: E2 to E12, UHF : E21 to E69
(CATV) S1 to S20, HYPER: S21 to S47
Digital TV
2 Broadcasting system
3 Receiving system
4 Scart Jack (1EA) PAL, SECAM
Component & AV
5
Common port (1EA)
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
9 Earphone out (1EA)
10 USB (1EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD
11 DVB
12 Ethernet (1EA) DLNA(Wired, DMP only) Only UK T2 Model (LF57/LF56/LF55/LF54) : for MHEG
1) DVB-T
2) DVB-C
Satellite Digital TV
1) DVB-T/T2
2) DVB-C
3) DVB-S/S2
Analog : Upper Heterodyne
Digital : COFDM, QAM
Video Input RCA (PAL, SECAM,
NTSC)
Component Input (Y/Cb/Cr, Y/Pb/Pr)
Antenna, AV1, AV2, Component,
HDMI1, HDMI2, USB
DVB-T
DVB-C
DVB-S CI + : Germany(Astra HD+ )
Digital TV : VHF, UHF
Satellite TV :
VHF, UHF,
C-Band, Ku-Band
► 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
► 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
only
4 System : PAL, SECAM, NTSC, PAL60
LF62/LF57/LF56 Series
CI : UK, Finland, Denmark, Norway, Sweden, Russia, Spain,
Ireland, Luxemburg, Belgium, Netherland
CI+ : France(Canal+), Italy(DGTVi)
CI : Switzerland, Austria, Slovenia, Hungary, Bulgaria
CI+ : Switzerland(UPC,Cablecom), Netherland(Ziggo),
Germany(KDG,CWB), Finland(labwise)
Only for training and service purposes
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LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 8
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
720*576 15.625 50.00 13.5 SDTV ,DVD 576I
1
720*480 15.73 60.00 13.5135 SDTV ,DVD 480I
2
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
Only for training and service purposes
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LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 9
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
Only for training and service purposes
- 9 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 10
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
10 1920*1080 56.30 50 148.5 HDTV 1080P
11 1920*1080 67.50 60 148.5 HDTV 1080P
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
Side by Side(half), Top and bottom,
Single frame sequential
Side by Side(half), Top and bottom,
Single frame sequential
6.3. USB Input
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode
1. 1920*1080 33.75 30 74.25 HDTV 1080P
Side by Side, Top & Bottom,JPS,
MPO(Photo)
6.4. 3D Input mode
No. Side by Side Top & Bottom Single Frame Sequential Frame Packing
1
Only for training and service purposes
- 10 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 11
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED TV with
LD55T chassis.
2. Designation
(1) The adjustment is according to the order which is designated
and which must be followed, according to the plan
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 : 220 V, 60 Hz
(6) Adjustment equipments: Color Analyzer(CA-210 or CA-110),
DDC Adjustment Jig, Service remote control.
(7) Push the "IN STOP" key - For memory initialization.
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.
which
3. Main PCB check process
▪ APC - After Manual-Insert, executing APC
* 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.
(3) Click "Read" tab, and then load download file(XXXX.bin)
by clicking "Read".
(1)
filexxx.bin
(4) Click "Connect" tab. If "Can't" is displayed, check connection
between computer, jig, and set.
(2)
(3)
Please Check the Speed :
To use speed between
from 200KHz to 400KHz
(5) Click "Auto" tab and set as below.
(6) Click "Run".
(7) After downloading, check "OK" message.
(4)
filexxx.bin
(5)
(7)...........OK
(6)
* 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
data is automatically detecting.
(3) Show the message "Copying files from memory".
(4) Updating is starting.
(5) Updating Completed, The TV will restart automatically in 5
seconds.
(6) 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.
Only for training and service purposes
- 11 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 12
* 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.
Tool
Tool
Tool
MODEL
42LF620V-ZB 107 2503 6850 50528 1538 2320
Option1
Option2
Option3
Tool
Option4
Tool
Option5
Tool
Option6
3.1. ADC Process(Optional)
* If ADC processes as OTP, There is no need to proceed
internal ADC.
- Enter Service Mode by pushing "ADJ" key,
- Enter Internal ADC mode by pushing "►" key at "8. ADC
Calibration".
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6l
6. Country Group
7. Area Option
8.ADC Calibration ►
9. White Balance
10. 10 Point WB
11. Test Pattern
12 EDID D/L
13. Sub B/C
14. Ext. Input Adjust
ADC Calibration
ADC Comp 480i
ADC Comp 1080p
ADC Type ◄ ►
Start Reset
OTP
OK
OK
<Caution> Using "P-ONLY" key of the Adjustment remote
control, power on TV.
* ADC Calibration Protocol (RS232)
No. Item CMD 1 CMD 2 Data 0
Enter Adjust
MODE
ADC adjust
Adjust
‘Mode In’
ADC
Adjust
A A 0 0
A D 1 0
When transfer the ‘Mode In’,
Carry the command.
Automatically adjustment
(The use of a internal pattern)
Adjust Sequence
▪ aa 00 00 [Enter Adjust Mode]
▪ xb 00 40 [Component Input]
▪ ad 00 10 [Adjust 480i & 1080p Comp]
▪ aa 00 90 End Adjust mode
* Required equipment : Adjustment remote control.
3.2. EDID Download
▪ After enter Service Mode by pushing "ADJ" key.
▪ Enter EDID D/L menu.
▪ Enter "START" by pushing "OK" key.
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
12. EDID D/L ►
13. Sub B/C
14. Ext. Input Adjust
<Caution> Never connect HDMI cable when EDID downloaded.
EDID D/L
HDMI1 NG
HDMI2 NG
Start Reset
3.3. EDID data
(1) 3D FHD Model HDMI EDID data
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
10 c 01 03 80 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
30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
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
70 d 01 e
80 02 03 33 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
A0 f 20 C0 0E 01 40 0A 0F 08 10 18 10 98 10 58
B0 10 38 10 01 1D 80 18 71 1C 16 20 58 2C 25 00 20
C0 C2 31 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55
D0 00 20 C2 31 00 00 1E 02 3A 80 18 71 38 2D 40 58
E0 2C 45 00 A0 5A 00 00 00 1E 01 1D 00 BC 52 D0 1E
F0 20 B8 28 55 40 C4 8E 21 00 00 1E 00 00 00 00 e
(2) Detail EDID Options are below
a. Product ID
MODEL NAME HEX EDID Table DDC Function
HD/FHD Model 0001 01 00 Analog/Digital
b. Serial No: Controlled on production line.
c. Month, Year:
ex) Week : '01' -> '01'
Year : '2015' -> '19' fix
d. Model Name(Hex):
cf) TV set’s model name in EDID data is below.
MODEL NAME(HEX)
LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)
e. Checksum: Changeable by total EDID data.
EDID C/S data
Check sum
(Hex)
Block 0 40
Block 1
FHD
HDMI
23 (HDMI1)
13 (HDMI2)
f. Vendor Specific
INPUT Model name(HEX)
HDMI1 78 03 0C 00 10 00 80 1E
HDMI2 78 03 0C 00 20 00 80 1E
3.4. Function Check
- Check display and sound
■ Check Input and Signal items.
1) TV
2) AV (SCART / CVBS)
3) COMPONENT (480i)
4) HDMI
* Display and Sound check is executed by Remote control.
<Caution>
Not to push the INSTOP key after completion if the function
inspection.
Only for training and service purposes
- 12 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 13
4. Total Assembly line process
4.1. White Balance adjustment
▪ W/B Equipment condition
CA210 : LED → CH14, Test signal: Inner pattern(80IRE)
▪ Above 5 minutes H/run in the inner pattern. (“power on” key
of adjust remote control)
▪ If it is executed W/B adjustment in 2~3 minutes H/run, it is
adjusted by Target data.
Mode Temp Coordinate spec Target
Cool 13,000 K
Medium 9,300 K
Warm 6,500 K
X=0.271 (± 0.002)
Y=0.270 (± 0.002)
X=0.286 (± 0.002)
Y=0.289 (± 0.002)
X=0.313 (± 0.002)
Y=0.329 (± 0.002)
▪ Normal line(LGD/CMI, March ~ December for Gumi, Global)
NetCase5
1 0-2 282 289 297 308 324 348
2 3-5 281 287 296 306 323 346
3 6-9 279 284 294 303 321 343
4 10-19 277 280 292 299 319 339
5 20-35 275 277 290 296 317 336
6 36-49 274 274 289 293 316 333
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
Aging time
(Min)
Cool Medium Warm
x y x y x y
271 270 286 289 313 329
▪ Normal line(LGD/CMI, January ~ February for Gumi, Apply
not Cinema Screen)
NetCase5
1 0-2 286 295 301 314 328 354
2 3-5 284 290 299 309 326 349
3 6-9 282 287 297 306 324 346
4 10-19 279 283 294 302 321 342
5 20-35 276 278 291 297 318 337
6 36-49 274 275 289 294 316 334
7 50-79 273 272 288 291 315 331
8 80-119 272 271 287 290 314 330
9 Over 120 271 270 286 289 313 329
Aging time
(Min)
Cool Medium Warm
x y x y x y
271 270 286 289 313 329
▪ Aging chamber(LGD/CMI)
NetCase4
1 0-5 280 285 294 308 319 340
2 6-10 276 280 290 303 315 335
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
6 41-50 266 265 280 288 305 320
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
Aging time
(Min)
Cool Medium Warm
x y x y x y
271 270 285 293 313 329
X=0.278
Y=0.280
X=0.293
Y=0.299
X=0.320
Y=0.339
▪ Use only AUO/Sharp/CSOT(Cool temp Spec is 13000 K)
Cool Medium Warm
x y x y x y
spec 271 270 286 289 313 329
target 278 280 293 299 320 339
▪ W/B information
Model information W/B information
Model Module Panel Backlight Type Using W/B table
All All All Direct LED O
* Connecting picture of the measuring instrument
(On Automatic control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C P-ONLY → Enter the
mode of White-Balance, the pattern will come out.
Full White Pattern
RS-232C Communication
CA-210
COLOR
ANALYZER
TYPE : CA-210
* Auto-control interface and directions
(1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10 lux).
(2) Adhere closely the Color analyzer(CA210) to the module
less than 10 cm distance, keep it with the surface of the
Module and Color analyzer's prove vertically.(80° ~ 100°).
(3) Aging time
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 5 minutes.
- Using 'no signal' or 'POWER ONLY' or the others, check
the back light on.
▪ Auto adjustment Map(using RS-232C to USB cable)
RS-232C COMMAND
[CMD ID DATA]
Wb 00 00 White Balance Start
Wb 00 ff White Balance End
RS-232C COMMAND
[CMD ID DATA]
Cool Mid Warm Cool Mid Warm
R Gain jg Ja jd 00 172 192 192 254
G Gain jh Jb je 00 172 192 192 192
B Gain ji Jc jf 00 192 192 172 254
R Cut 64 64 64 128
G Cut 64 64 64 128
B Cut 64 64 64 128
MIN
<Caution>
Color Temperature : COOL, Medium, Warm.
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
adjust other two lower than C0.(When R/G/B Gain are all
C0, it is the FULL Dynamic Range of Module)
CENTER
(DEFAULT)
MAX
Only for training and service purposes
- 13 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 14
* Manual W/B process using adjust Remote control.
▪ After enter Service Mode by pushing "ADJ" key,
▪ Enter White Balance by pushing "►" key at "9. White
Balance".
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
12 EDID D/L
13. Sub B/C
14. Ext. Input Adjust
* CASE Cool Mode
First adjust the coordinate far away from the target
value(x, y).B.
1) x, y > target
2) x, y < target
3) x >target, y < target
4) x < target, y > target
- Every 4 case have to fit y value by adjusting B Gain
and then fit x value by adjusting R-Gain.
- In this case, increasing/decreasing of B Gain and R
Gain can be adjusted.
Whit Balance
Color Temp. ◄ ►
R-Gain
G-Gain
B-Gain
R-Cut
G-Cut
B-Cut
Test-Pattern
Backlight
Reset To Set
Cool
172
172
192
64
64
64
ON
100
4.2. 3D function test
(Pattern Generator MSHG-600, MSPG-6100[Support HDMI1.4])
* HDMI mode NO. 872 , pattern No.83
(1) Please input 3D test pattern like below.
(2) When 3D OSD appear automatically , then select OK key.
(3) Don't wear a 3D Glasses, Check the picture like below.
How to adjust
1) In case G gain more than 172
Adjust R Gain and B Gain less than 192
2) If the G gain value be adjusted down to 172
One of the R/B Gain is 254
3) If G Gain is 172 , More than one of R/B Gain is to be
between 192~254
* CASE Medium / Warm
First adjust the coordinate far away from the target
value(x, y).
1) x, y > target
i) Decrease the R, G.
2) x, y < target
i) First decrease the B gain,
ii) Decrease the one of the others.
3) x > target, y < target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
4) x < target, y > target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
* After you finished all adjustments, Press "In-start" key and
compare Tool option and Area option value with its BOM, if
it is correctly same then unplug the AC cable. If it is not
same, then correct it same with BOM and unplug AC cable.
For correct it to the model's module from factory Jig model.
* Push the "IN STOP" key after completing the function
inspection. And Mechanical Power Switch must be set
“ON”.
4.3. IR emitter inspection
(1) Start 3D pattern inspection.
(2) If IR emitter signal is correctly received to IR receiver, the
lamp of IR tester turns on.
4.4. Outgoing condition Configuration
■ When pressing IN-STOP key by SVC remocon, Red LED
are blinked alternatively. And then automatically turn off.
(Must not AC power OFF during blinking)
Only for training and service purposes
- 14 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 15
5. HI-POT Test
5.1. HI-POT auto-check preparation
- Check the POWER cable and SIGNAL cable insertion condition
5.2. HI-POT auto-check
(1) Pallet moves in the station. (POWER CORD / AV CORD is
tightly inserted)
(2) Connect the AV JACK Tester.
(3) Controller (GWS103-4) on.
(4) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next process automatically.
5.3. Checkpoint
(1) Test voltage
- Touchable Metal : 3 KV / min at 100 mA
- SIGNAL : 3KV / min at 100 mA
(2) TEST time: 1 second. (case : mass production )
(3) TEST POINT
- Touchable Metal => LIVE & NEUTRAL : Touchable Metal.
- SIGNAL => LIVE & NEUTRAL : SIGNAL.
6. Model name & Serial number D/L
▪ Press "Power on" key of service remote control.
(Baud rate : 115200 bps)
▪ Connect RS232 Signal Cable to USB Jack.
▪ Write Serial number
▪ Must check the serial number at the Diagnostics of SET UP menu.
(Refer to below).
6.2. Command Set
Adjust mode CMD(hex) LENGTH(hex) Description
EEPROM WRITE A0h 84h+n n-bytes Write (n = 1~16)
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,
Phase
Data write : Model Name and Serial Number write in EEPROM,.
6.3. 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 Adjustment remote control.
2) Go to the menu "6.Model Number D/L" like below photo.
3) Input the Factory model name or Serial number like photo.
6.1. Signal Table
CMD LENGTH ADH ADL DATA_1 . . . Data_n CS DELAY
CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 +...+ Data_n
Delay : 20ms
4) Check the model name Instart menu. → Factory name displayed.
ex 47LF560V-ZA)
5) Check the Diagnostics.(DTV country only) → Buyer model
displayed.(ex
47LF560V-ZA
)
Only for training and service purposes
- 15 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 16
7. MAC Address & CI+ key download
7.1. MAC Address
7.1.1. Equipment & Condition
▪ Play file : Serial.exe
▪ MAC Address edit
▪ Input Start / End MAC address
7.1.2. Download method
(1) Communication Prot connection
Connection: PCBA(USB Port) → USB to Serial Adapter(UC-
232A) → RS-232C cable → PC(RS-232C port)
* Caution: LJ21* chassis support only UC-232A driver. (only
use this one.)
(2) MAC Address & CI+ Key Download
▪ Set CI+ Key path Directory at Start Mac & CI+ Download
Programme
▪ Com 1,2,3,4 and 115200(Baudrate)
7.2. LAN Inspection
7.2.1. Equipment & Condition
▪ Each other connection to LAN Port of IP Hub and Jig
7.2.2. LAN inspection solution
▪ LAN Port connection with PCB
▪ Network setting at MENU Mode of TV
▪ Setting automatic IP
▪ Setting state confirmation
-> If automatic setting is finished, you confirm IP and MAC
Address.
GP4_LOW
▪ Port connection button click(1)
▪ Push the (2) MAC Address write.
▪ At success Download, check the OK (3)
▪ Start CI+ Key Download, Push the (4)
▪ Check the OK or NG
7.3. LAN PORT INSPECTION(PING TEST)
Connect SET -> LAN port == PC -> LAN Port
SET PC
7.3.1. Equipment setting
(1) Play the LAN Port Test PROGRAM.
(2) Input IP set up for an inspection to Test Program.
*IP Number : 12.12.2.2
7.3.2. LAN PORT inspection (PING TEST)
(1) Play the LAN Port Test Program.
(2) Connect each other LAN Port Jack.
(3) Play Test (F9) button and confirm OK Message.
(4) Remove LAN cable.
Only for training and service purposes
- 16 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 17
1. CIS T2/C/S2 3D Model
BLOCK DIAGRAM
Serial Flash
(IC1300, 8Mbit)
SPI_SCK/SDI/SDO/CS
(IC104, 256Kbit)
System EEPROM
I2C_SCL/SDA
SPK_L
SPK_R
30P HD LVDS wafer
(P1801)
X-tal
24MHZ
DDR3 SDRAM
(IC1201, 128MB)
B-MDQL[0 -7], B-MDQU[0 -7],…
(IC5600)
TAS5733
AUD_LRCH,
AMP_SCL/SDA
AUD_MASTER_CLK,
AUD_LRCK, AUD_SCK
(P4600)
Connector
Jog KEY, LED_R, IR
(P1800)
RXB0+/-~RXB4+/-, RXBCK+/ -
RXA0+/-~RXA4+/-, RXACK+/ -
51P FHD LVDS wafer
Main SOC
M1A-LGE2133
(IC101, DDR3 128MB)
USB1_OCP/CTL
OCP
DM/DP
SN1406035RGER
CK+/-, D0+/ -, D1+/-, D2+/-,_HDMI4
+5V_USB
USB
(JK700)
HDMI2
Only for training and service purposes
PCM_A[0:7]
HP_L/ROUT
IC102 (1Gbit)
NAND FLASH
DDC_SCL/SDA_4, HDMI_CEC
(JK801)
(JK3000)
Headphone
Only LF62/57/56
T4LCX244FT Buffer
H27U1G8F2CTR -BC
SIDE
PCM_DATA[0:7]
PCM_A[8:14]
(P1900)
CI SLOT
IF_N/P
LNB_TX
TS_DATA[0:7]
LNB_OUT, DEMOD_RESET
FE_TS_DATA[0:7]
Tuner
IF_AGC
TU_SCL / SDA
DEMOD_SCL/SDA
F/NIM
(TU3701)
SPDIF_OUT
DDC_SCL/SDA_2, HDMI_CEC
CK+/-, D0+/ -, D1+/-, D2+/-_HDMI2
HDMI1
(JK800)
(JK1001)
except LF54
SPDIF(Optic)
COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN
(JK2802)
COMPONENT
REAR
- 17 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 18
2. CIS T2/C/S2 2D Model
Serial Flash
(IC1300, 8Mbit)
SPI_SCK/SDI/SDO/CS
(IC104, 256Kbit)
System EEPROM
I2C_SCL/SDA
X-tal
24MHZ
SPK_L
(IC5600)
TAS5733
AUD_LRCH,
AMP_SCL/SDA
AUD_MASTER_CLK,
AUD_LRCK, AUD_SCK
Main SOC
M1A-LGE2134
(IC101, DDR3 256MB)
SPK_R
(P1801)
(P4600)
Connector
(P1800)
Jog KEY, LED_R, IR
30P HD LVDS wafer
51P FHD LVDS wafer
RXB0+/-~RXB4+/ -, RXBCK+/ -
RXA0+/-~RXA4+/ -, RXACK+/ -
USB1_OCP/CTL
OCP
DM/DP
SN1406035RGER
CK+/-, D0+/ -, D1+/-, D2+/-,_HDMI4
+5V_USB
USB
(JK700)
HDMI2
Only for training and service purposes
PCM_A[0:7]
HP_L/ROUT
IC102 (1Gbit)
NAND FLASH
DDC_SCL/SDA_4, HDMI_CEC
(JK801)
(JK3000)
Headphone
Only LF62/57/56
T4LCX244FT Buffer
H27U1G8F2CTR -BC
SIDE
PCM_DATA[0:7]
PCM_A[8:14]
(P1900)
CI SLOT
TS_DATA[0:7]
FE_TS_DATA[0:7]
- 18 -
IF_N/P
LNB_TX
LNB_OUT, DEMOD_RESET
Tuner
IF_AGC
TU_SCL / SDA
DEMOD_SCL/SDA
F/NIM
(TU3701)
SPDIF_OUT
DDC_SCL/SDA_2, HDMI_CEC
CK+/-, D0+/ -, D1+/-, D2+/-_HDMI2
HDMI1
(JK800)
(JK1001)
except LF54
SPDIF(Optic)
REAR
COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN
(JK2802)
COMPONENT
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 19
3. EU T2/C/S2 2D Model
Serial Flash
(IC1300, 8Mbit)
SPI_SCK/SDI/SDO/CS
(IC104, 256Kbit)
System EEPROM
I2C_SCL/SDA
SPK_L
SPK_R
30P HD LVDS wafer
(P1801)
X-tal
24MHZ
(IC5600)
TAS5733
AUD_LRCH,
AMP_SCL/SDA
AUD_MASTER_CLK,
AUD_LRCK, AUD_SCK
(P4600)
Connector
Jog KEY, LED_R, IR
(P1800)
RXB0+/-~RXB4+/-, RXBCK+/ -
RXA0+/-~RXA4+/-, RXACK+/ -
51P FHD LVDS wafer
Main SOC
M1A-LGE2134
(IC101, DDR3 256MB)
USB1_OCP/CTL
OCP
DM/DP
SN1406035RGER
CK+/-, D0+/ -, D1+/-, D2+/-,_HDMI4
+5V_USB
USB
(JK700)
HDMI2
Only for training and service purposes
PCM_A[0:7]
HP_L/ROUT
IC102 (1Gbit)
NAND FLASH
DDC_SCL/SDA_4, HDMI_CEC
(JK801)
(JK3000)
Headphone
Only LF62/57/56
T4LCX244FT Buffer
H27U1G8F2CTR -BC
SIDE
PCM_DATA[0:7]
PCM_A[8:14]
(P1900)
CI SLOT
IF_N/P
LNB_TX
TS_DATA[0:7]
LNB_OUT, DEMOD_RESET
FE_TS_DATA[0:7]
Tuner
IF_AGC
TU_SCL / SDA
DEMOD_SCL/SDA
F/NIM
(TU3701)
SPDIF_OUT
EPHY_TP/TN/RP/RN
DDC_SCL/SDA_2, HDMI_CEC
CK+/-, D0+/ -, D1+/-, D2+/-_HDMI2
HDMI1
(JK800)
LAN
(JK1001)
except LF54
SPDIF(Optic)
Only UK
(JK2100)
SC1/AV2_CVBS_IN, SC1_R+/G+/B+
DTV/MNT_OUT, DTV/MNT_L/R_OUT
COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN
(JK2801)
(JK2802)
F-SCART
COMPONENT
REAR
- 19 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 20
4. EU T/C 2D Model
Serial Flash
(IC1300, 8Mbit)
SPI_SCK/SDI/SDO/CS
(IC104, 256Kbit)
System EEPROM
I2C_SCL/SDA
SPK_L
SPK_R
30P HD LVDS wafer
(P1801)
X-tal
24MHZ
(IC5600)
TAS5733
AUD_LRCH,
AMP_SCL/SDA
AUD_MASTER_CLK,
AUD_LRCK, AUD_SCK
(P4600)
Connector
Jog KEY, LED_R, IR
(P1800)
RXB0+/-~RXB4+/-, RXBCK+/ -
RXA0+/-~RXA4+/-, RXACK+/ -
51P FHD LVDS wafer
Main SOC
M1A-LGE2134
(IC101, DDR3 256MB)
USB1_OCP/CTL
OCP
DM/DP
USB
HP_L/ROUT
SN1406035RGER
+5V_USB
(JK700)
Headphone
Only for training and service purposes
IC102 (1Gbit)
NAND FLASH
H27U1G8F2CTR -BC
(JK3000)
Only LF62/57/56
SIDE
PCM_A[0:7]
PCM_A[8:14]
T4LCX244FT Buffer
(P1900)
CI SLOT
IF_N/P
IF_AGC
Tuner
(TU2600)
TU_SCL / SDA
H/NIM
DDC_SCL/SDA_2, HDMI_CEC
CK+/-, D0+/ -, D1+/-, D2+/-_HDMI2
HDMI1
(JK4200)
PCM_DATA[0:7]
TS_DATA[0:7]
FE_TS_DATA[0:7]
SPDIF_OUT
DDC_SCL/SDA_4, HDMI_CEC
CK+/-, D0+/ -, D1+/-, D2+/-,_HDMI4
HDMI2
(JK4201)
SC1/AV2_CVBS_IN, SC1_R+/G+/B+
(JK1001)
except LF54
SPDIF(Optic)
DTV/MNT_OUT, DTV/MNT_L/R_OUT
COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN
(JK2801)
(JK2802)
F-SCART
COMPONENT
REAR
- 20 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 21
EXPLODED VIEW
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.
400
500
502
501
120
800
900
521
LV1
540
530
121
200
Only for training and service purposes
- 21 -
820
AG1
A10
A2
Set + Stand
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Page 22
Trouble shooting guide
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Page 23
Contents of Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
* First of all, Check whether there is SVC Bulletin in GCSC System for these model.
No. Error symptom (High category) Error symptom (Mid category) Page Remarks
1
No video/Normal audio 1
2 No video/No audio 2
3 Tuning fail, Picture broken/ Freezing 3, 4
A. Video error
4 Color error 5
5
6
Vertical/Horizontal bar, residual image, light spot,
external device color error
6
No power 7
B. Power error
7 Off when on, off while viewing, power auto on/off 8
8
No audio/Normal video 9
C. Audio error
9 Wrecked audio/discontinuation/noise 10
10
Remote control & Local switch checking 11
D. Function error
11 External device recognition error 12
12 E. Noise Circuit noise, mechanical noise 13
13 F. Exterior error Exterior defect 14
Page 24
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
A. Video error
Error symptom
No video / Normal audio
Established
date
Revised date
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D ↔ Power B/D, LVDS Cable, Speaker Cable, IR B/D Cable…)
No video
Normal audio
Normal
Y
Audio
N
Move to
No video/No audio
☞A1
Check Back Light
On with naked eye
☞A2
Check Power Board to LED Back light Voltage
Y
On
N
Normal
Voltage
N
Repair Power
Board or parts
☞A4
Check Power
Board 13.2V etc.
Y
Change module
Normal
Voltage
N
Repair Power
Board or parts
End
Y
Replace T-con
Board or module
1/14
※Precaution
Always check & record S/W Version and White
Balance value before replacing the Main Board
☞A6 & A3
Replace Main Board Re-enter White Balance value
Page 25
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
No video /
No audio
☞A4
Check various
voltages of Power
Board ( 13.2V)
A. Video error
No video / No audio
Normal
Voltage
N
Replace Power
Board and repair
parts
Y
Check and
replace
MAIN B/D
End
Established
date
Revised date
2/14
Page 26
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
☞ A5
Check RF Signal level
Normal
Y
Signal
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
A. Video error
Tuning fail, Picture broken/ Freezing
. By using Digital signal level meter
. By using Diagnostics menu on OSD
( Menu → Customer Support(red button on remote control) → Signal Test )
- Signal strength (Normal : over 50%)
- Signal quality (Normal : over 50%)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ DVD Player ,Set-Top-Box, Different maker TV etc`
☞ A6
Normal
Picture
N
Y
Check
S/W Version
SVC
Bulletin
N
Y
Established
date
Revised date
Check
Tuner soldering
Normal
Picture
N
Y
3/14
End
Normal
N
Picture
Y
End
Contact with signal distributor
or broadcaster (Cable or Air)
S/W Upgrade
Normal
Picture
Y
End
Replace
Main B/D
N
Page 27
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
☞ A5
Check RF Signal level
Normal
Y
Signal
N
Contact with signal
distributor
or broadcaster
(Cable or Air)
Check RF signal cable (DVB satellite signal or not)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
Check satellite setting.
- Check LNB frequency.
- Check satellite
- Check Satellite connection
(DiSEqC, motor, etc…)
A. Video error
Tuning fail, Picture broken/ Freezing
Normal
Setting
Change satellite setting
(match with installed ANT)
Y
N
☞ A6
Check
S/W Version
Established
date
Revised date
SVC
Bulletin
Y
S/W Upgrade
N
Check
Tuner soldering
4/14
Replace
Main B/D
End
Normal
Picture
Y
End
N
Normal
Picture
Y
End
N
Page 28
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
☞A7
Check color by input
- External Input
- COMPONENT
- HDMI/DVI
☞A10
Check Test pattern
Color
error
N
Check error
color input
mode
A. Video error
☞ A8 / A9
※ Check and
replace Link
Y
Cable
(LVDS) and
contact
condition
External
Input/Component
error
Color error
Color
error
N
Check
external
device and
cable
Y
Replace Main B/D
Established
date
Revised date
External
device/Cable
Normal
N
Y
Color
error
End
5/14
Y
Replace module
N
Replace Main B/D
HDMI
error
Check external
device and
cable
Request repair
for external
device/cable
N
External
device/Cable
Normal
Y
Replace Main B/D
Page 29
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
A. Video error
Error symptom
Vertical / Horizontal bar, residual image,
light spot, external device color error
Vertical/Horizontal bar, residual image, light spot
☞A7
Check color condition by input
- External Input
- Component/AV
- HDMI
☞A10
Check Test pattern
Replace
module
External device screen error-Color error
Check S/W Version
Check
Version
S/W Upgrade
Screen
normal
N
Y
N
Check external
Y
device
connection
condition
Check screen
condition by input
-External Input
-Component
HDMI/DVI
Screen
Y
normal
N
Request repair
for external
device
External
☞ A8/ A9
Check and
replace Link
Cable
Input
error
Compo
nent
error
Established
date
Revised date
Screen
normal
N
Replace Main B/D
Y
End
Connect other external
device and cable
(Check normal operation of
External Input, Component
and HDMI by connecting
Jig, pattern Generator,
Set-top Box etc.
Screen
N
normal
Y
Request repair for
external device
6/14
Replace
Module
N
Screen
normal
Y
End
Replace
Main B/D
Normal
Screen
Y
End
N
HDMI
error
Connect other external
device and cable
(Check normal operation
of External Input,
Component, HDMI by
connecting Jig, pattern
Generator ,Set-top Box
etc.
Y
Screen
normal
N
Replace
Main B/D
Page 30
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
☞A11
Check
Power LED
Stand-By : Red
Power
Y
LED On
N
Check Power cord
was inserted properly
N
Normal
※
Y
B. Power error
☞A12
Check ST-BY 3.5V
No power
DC Power on
by pressing Power Key
On Remote control
☞A4
Measure voltage of each output of Power B/D
Y
Normal
Voltage
Established
date
Revised date
Normal
Operati
on
Y
Normal
Voltage
N
Y
☞A13
Check Power
On ‘”High”
Replace Main B/D
OK
Y
Replace Main B/D
7/14
Replace
Power B/D
End
N
Replace Power B/D
N
Replace Power B/D
Page 31
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Check outlet
Check A/C cord
Check for all 3- phase
power out
Off when on, off while viewing, power auto on/off
Error
N
Y
Fix A/C cord & Outlet
and check each 3
phase out
B. Power error
☞A14
Check Power Off
Mode
☞A13
(If Power Off mode
is not displayed)
Check Power B/D
voltage
※ Caution
Check and fix exterior
of Power B/D Part
CPU
Abnorm
al
Abnorm
al1
Normal
Y
Voltage
N
Replace Power B/D
Established
date
Revised date
Replace Main B/D
Replace Main B/D
Normal
Y
N
Replace Power B/D
8/14
End
* Please refer to the all cases which
can be displayed on power off mode.
Status Power off List Explanation
"POWEROFF_REMOTEKEY" Power off by REMOTE CONTROL
"POWEROFF_OFFTIMER" Power off by OFF TIMER
"POWEROFF_SLEEPTIMER" Power off by SLEEP TIMER
"POWEROFF_INSTOP" Power off by INSTOP KEY
"POWEROFF_AUTOOFF" Power off by AUTO OFF
Normal
"POWEROFF_ONTIMER" Power off by ON TIMER
"POWEROFF_RS232C" Power off by RS232C
"POWEROFF_RESREC" Power off by Reservated Record
"POWEROFF_RECEND" Power off by End of Recording
"POWEROFF_SWDOWN" Power off by S/W Download
"POWEROFF_UNKNOWN" Power off by unknown status except listed case
Abnormal
"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble
"POWEROFF_CPUABNORMAL" Power off by CPU Abnormal
Page 32
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
No audio
Screen normal
☞A15
Check user
Menu Audio
Sound Out
C. Audio error
No audio/ Normal video
TV
Speaker
Select TV Speaker
Check
Speaker
connection
Y
N
☞A16
Check audio 13.2V
of Power Board
Replace Power Board and repair parts
Disconn
N
ection
Established
date
Revised date
Normal
Y
Voltage
N
Replace Main Board
9/14
End
Y
Replace Speaker
Page 33
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Check input
signal
-RF
-External Input
signal
C. Audio error
Wrecked audio / discontinuation / noise
Established
date
Revised date
→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
☞A16
Check audio
Voltage (13.2V)
Normal
Y
Voltage
N
Replace Power B/D
Replace Main B/D
Signal
Normal
N
Y
Wrecked Audio/
Discontinuation/Noise
for all audio
Wrecked Audio/
Discontinuation/Noise
only for D-TV
Wrecked Audio/
Discontinuation/Noise
only for Analog
Wrecked Audio/
Discontinuation/Noise
only for External Input
Check and replace
speaker and
connector
Replace Main B/D
Connect and check
other external
device
10/14
End
(When RF signal is not
received)
Request repair to external
cable/ANT provider
(In case of
External Input
signal error)
Check and fix
external device
Normal
N
Audio
Y
Check and fix external device
Page 34
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Remote control(R/C) operating error
☞A17
Check R/C itself
Operation
Check R/C Operating
When turn off light
in room
If R/C operate,
Explain the customer
cause is interference
from light in room.
Normal
Y
Operating
N
Check & Replace
Baterry of R/C
Normal
Operating
Check & Repair
Cable connection
Connector solder
N
D. Function error
Remote control & Local switch checking
Normal
Operating
End
Y
End
N
Y
☞A17
Check 3.5V
On Main B/D
☞A4
Established
date
Revised date
☞A17
Normal
Voltage
Y
Check IR
Output signal
N
Check 13.2V on Power B/D
Replace Main B/D
(Power B/D don’t have problem)
11/14
Replace
Main B/D
Y
Normal
Signal
N
Repair/Replace
IR B/D
Replace R/C
Page 35
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Check
input
signal
Check and fix
external device/cable
Signal
Input
N
Y
D. Function error
External device recognition error
Check technical
information
- Fix information
- S/W Version
Technical
information
Fix in
accordance
with technical
information
Y
N
Established
date
Revised date
External Input
And Component
Recognition error
HDMI, Optical
Recognition error
12/14
Replace Main B/D
Replace Main B/D
Page 36
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Identify
nose type
E. Noise
Circuit noise, mechanical noise
Circuit
noise
Mechanical
noise
※ Mechanical noise is a natural
phenomenon, and apply the 1st level
description. When the customer does not
agree, apply the process by stage.
※ Describe the basis of the description in
“Part related to nose” in the Owner’s Manual.
Check location
of noise
Check location of
noise
Replace Power B/D
OR
Established
date
Revised date
※ When the nose is severe, replace the module
(For models with fix information, upgrade the S/W or
provide the description)
※ If there is a “Tak Tak” noise from the cabinet,
refer to the KMS fix information and then proceed
as shown in the solution manual
(For models without any fix information, provide
the description)
13/14
Page 37
Standard Repair Process
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Zoom part with
exterior damage
F. Exterior defect
Exterior defect
Module
damage
Cabinet
damage
Remote
Controller
damage
Replace module
Replace cabinet
Replace remote controller
Established
date
Revised date
14/14
Stand
damage
Replace stand
Page 38
Contents of Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
No. Error symptom Content Page Remarks
1
Check LCD back light with naked eye A1
2 LED driver B+ 24V measuring method A2
A. Video error_ No video/Normal audio
3 Check White Balance value A3
4 Power Board voltage measuring method A4
6
TUNER input signal strength checking method A5
A. Video error_ No video/Video lag/stop
7 Version checking method A6
9
10
A. Video error_Color error
11
12
13
A. Video error_Vertical/Horizontal bar,
14 Check Link Cable (LVDS) reconnection condition
residual image, light spot
Connection diagram A7
Check Link Cable (LVDS) reconnection condition
A8
A9
Adjustment Test pattern - ADJ Key A10
Connection diagram A8
A8
A9
15 Adjustment Test pattern - ADJ Key A10
16
Exchange T-Con Board (1) A-1/5
17 Exchange T-Con Board (2) A-2/5
<Appendix>
18
Defected Type caused by T-Con/ Inverter/
Module
19
20 Exchange Module itself (2) A-5/5
Exchange LED driver Board (PSU) A-3/5
Exchange Module itself (1) A-4/5
Page 39
Contents of Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
No. Error symptom Content Page Remarks
21
Check front display LED A11
22 Check power input Voltage & ST-BY 3.5V A12
B. Power error_No power
23 Checking method when power is ON A13
24 POWER BOARD voltage measuring method A4
B. Power error_Off when on, off while
26
viewing
28
C. Audio error_No audio/Normal video
29
C. Audio error_Wrecked
30
audio/discontinuation
D. Function error_ No response in remote
31
controller, key error
POWER OFF MODE checking method A14
Checking method in menu when there is no audio A15
Voltage and speaker checking method when there
is no audio
Voltage and speaker checking method in case of
audio error
A16
A16
Remote controller operation checking method A17
Page 40
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_No video/Normal audio
Check Back Light On with naked eye
Established
date
Revised
date
A1
Power On -> disjoint back case -> check lighting
Page 41
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_No video/Normal audio
Power Board to LED back light Voltage
Established
date
Revised
date
A2
1. Measure DC Voltage applying to LED backlight from Power Board.
2. Output DC Voltage from Power Board -> supply to LED backlight.
Check Pin contacting statement and connection statement.
Page 42
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_No video/Normal audio
Check White Balance value
Established
date
Revised
date
A3
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 9.
3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm),
re-enter the value after replacing the MAIN BOARD.
Page 43
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_No video/ Audio
Power Board voltage measuring method
Established
date
Revised
date
Check D.13.2V , A13.2V (4 ~8 PIN)
12 Pin (Power Board ↔ Main Board)
SMH200-H12S4
1 Power on 2 PDIM#2
3 GND 4 D.13.2V
5 D.13.2V 6 D.13.2V
7 A.13.2V 8 A.13.2V
9 GND 10 GND
11 DRV_ON 12 PDIM#1
A4
Page 44
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_Video error, video lag/stop
TUNER input signal strength checking method
MENU Press red key Remote controller signal test
Select channel
Established
date
Revised
date
A5
When the signal is strong, use the
attenuator (-10dB, -15dB, -20dB etc.)
Page 45
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_Video error, video lag/stop
LCD-TV Version checking method
Checking SW version method for remote controller for adjustment
Established
date
Revised
date
A6
Press the IN-START with the remote
controller for adjustment
Page 46
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error _Vertical/Horizontal bar, residual
image, light spot
LCD TV connection diagram (1)
Established
date
Revised
date
A7
As the part connecting to the external input, check the
screen condition by signal
Page 47
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_Color error
Check and replace Link Cable(LVDS) and contact condition
Established
date
Revised
date
A8/A9
1. Check and replace LVDS Cable
2. Check LVDS connection condition
Page 48
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_Color error
Adjustment Test pattern - ADJ Key
Established
date
Revised
date
A10
You can view 6 types of patterns using the ADJ Key
Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..)
4.Video error (Classification of MODULE or Main-B/D)
Page 49
Appendix : Exchange T-Con Board (1)
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Solder defect, CNT Broken
Solder defect, CNT Broken
Solder defect, CNT Broken
T-Con Defect, CNT Broken
T-Con Defect, CNT Broken
Solder defect, CNT Broken
T-Con Defect, CNT Broken
Solder defect, CNT Broken
Abnormal Power Section
Solder defect, Short/Crack
Abnormal Power Section Solder defect, Short/Crack
Page 50
Appendix : Exchange T-Con Board (2)
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Abnormal Power Section
Solder defect, Short/Crack
Abnormal Power Section
Fuse Open, Abnormal power section
Solder defect, Short/Crack
Abnormal Display
GRADATION
Noise
GRADATION
Page 51
Appendix : Exchange the Module (1)
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Panel Mura, Light leakage
Crosstalk
Panel Mura, Light leakage
Press damage
Press damage
Crosstalk
Un-repairable Cases
In this case please exchange the module.
Press damage
Page 52
Appendix : Exchange the Module (2)
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Vertical Block
Source TAB IC Defect
Horizontal Block
Gate TAB IC Defect
Horizontal Block
Gate TAB IC Defect
Gate TAB IC Defect
Vertical Line
Source TAB IC Defect
Horizontal Block
Gate TAB IC Defect
Gate TAB IC Defect
Vertical Block
Source TAB IC Defect
Horizontal line
Gate TAB IC Defect
Gate TAB IC Defect
Un-repairable Cases
In this case please exchange the module.
Page 53
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
B. Power error _No power
Check front display LED
Established
date
Revised
date
A11
ST-BY condition: Red
Front LED control :
Menu Option Standby Light On/Off
Page 54
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
B. Power error _No power
Check power input voltage and ST-BY 3.5V
Established
date
Revised
date
Check D.13.2V (4,5,6 PIN)
12 Pin (Power Board ↔ Main Board)
SMH200-H12S4
A12
1
3
5
7
9
11
Power on
GND
D.13.2V
A.13.2V
GND
DRV_ON
2
4
6
8
10
12
PDIM#2
D.13.2V
D.13.2V
A.13.2V
GND
PDIM#1
Page 55
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
B. Power error _No power
Checking method when power is ON
Established
date
Revised
date
A13
Check “power on(Pin 1)” pin is high(about 3.3V)
12 Pin (Power Board ↔ Main Board)
SMH200-H12S4
1
3
5
7
9
11
Power on
GND
D.13.2V
A.13.2V
GND
DRV_ON
2
4
6
8
10
12
PDIM#2
D.13.2V
D.13.2V
A.13.2V
GND
PDIM#1
Page 56
Standard Repair Process Detail Technical Manual
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Error symptom
Content
B. Power error _Off when on, off whiling viewing
POWER OFF MODE checking method
Established
date
Revised
date
A14
Checking order
1. Press the IN-START button of the remote controller for adjustment
2. Check the entry into adjustment item 3.
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Error symptom
Content
C. Audio error_No audio/Normal video
Checking method in menu when there is no audio
Established
date
Revised
date
A15
Checking order
1. Press the MENU button on the remote controller
2. Select the AUDIO function of the Menu
3. Select TV Speaker Check
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Error symptom
Content
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
Established
date
Revised
date
A16
12 Pin (Power Board ↔ Main Board)
②
1
3
5
7
9
11
Power on
D.13.2V
A.13.2V
DRV_ON
SMH200-H12S4
GND
GND
2
4
6
8
10
12
PDIM#2
D.13.2V
D.13.2V
A.13.2V
GND
PDIM#1
Checking order
1. Check the contact condition of or 13.2V connector of Main Board
2. Measure the 13.2V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
3. Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound
when you touch the GND and output terminal, the speaker is normal.
①
③
< Main Ass’y>
Page 59
1
GND
2
KEY1
3
KEY2
4
3.5V_ST
5
GND
6
LED_R
7
IR
8
GND
9
SCL
10
SDA
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
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Error symptom
Content
< Sub Ass’y>
①
D. Function error_ No response in remote controller,
key error
Remote controller operation checking method
②
< Main Ass’y>
Established
date
Revised
date
③
④
A17
P4600
Checking order
1, 2. Check IR cable condition between IR & Main board.
3. Check the st-by 3.5V on the terminal 4.
4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog
Tester needle moves slowly, and defective when it does not move at all.
Page 60
Page 61
Trouble shooting guide
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Page 62
Contents of Standard Repair Process
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* First of all, Check whether there is SVC Bulletin in GCSC System for these model.
No. Error symptom (High category) Error symptom (Mid category) Page Remarks
1
No video/Normal audio 1
2 No video/No audio 2
3 Tuning fail, Picture broken/ Freezing 3, 4
A. Video error
4 Color error 5
5
6
Vertical/Horizontal bar, residual image, light spot,
external device color error
6
No power 7
B. Power error
7 Off when on, off while viewing, power auto on/off 8
8
No audio/Normal video 9
C. Audio error
9 Wrecked audio/discontinuation/noise 10
10
Remote control & Local switch checking 11
D. Function error
11 External device recognition error 12
12 E. Noise Circuit noise, mechanical noise 13
13 F. Exterior error Exterior defect 14
Page 63
Standard Repair Process
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A. Video error
Error symptom
No video / Normal audio
Established
date
Revised date
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D ↔ Power B/D, LVDS Cable, Speaker Cable, IR B/D Cable…)
No video
Normal audio
Normal
Y
Audio
N
Move to
No video/No audio
☞A1
Check Back Light
On with naked eye
☞A2
Check Power Board to LED Back light Voltage
Y
On
N
Normal
Voltage
N
Repair Power
Board or parts
☞A4
Check Power
Board 13.2V etc.
Y
Change module
Normal
Voltage
N
Repair Power
Board or parts
End
Y
Replace T-con
Board or module
1/14
※Precaution
Always check & record S/W Version and White
Balance value before replacing the Main Board
☞A6 & A3
Replace Main Board Re-enter White Balance value
Page 64
Standard Repair Process
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Error symptom
No video /
No audio
☞A4
Check various
voltages of Power
Board ( 13.2V)
A. Video error
No video / No audio
Normal
Voltage
N
Replace Power
Board and repair
parts
Y
Check and
replace
MAIN B/D
End
Established
date
Revised date
2/14
Page 65
Standard Repair Process
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Error symptom
☞ A5
Check RF Signal level
Normal
Y
Signal
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
A. Video error
Tuning fail, Picture broken/ Freezing
. By using Digital signal level meter
. By using Diagnostics menu on OSD
( Menu → Customer Support(red button on remote control) → Signal Test )
- Signal strength (Normal : over 50%)
- Signal quality (Normal : over 50%)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ DVD Player ,Set-Top-Box, Different maker TV etc`
☞ A6
Normal
Picture
N
Y
Check
S/W Version
SVC
Bulletin
N
Y
Established
date
Revised date
Check
Tuner soldering
Normal
Picture
N
Y
3/14
End
Normal
N
Picture
Y
End
Contact with signal distributor
or broadcaster (Cable or Air)
S/W Upgrade
Normal
Picture
Y
End
Replace
Main B/D
N
Page 66
Standard Repair Process
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Error symptom
☞ A5
Check RF Signal level
Normal
Y
Signal
N
Contact with signal
distributor
or broadcaster
(Cable or Air)
Check RF signal cable (DVB satellite signal or not)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
Check satellite setting.
- Check LNB frequency.
- Check satellite
- Check Satellite connection
(DiSEqC, motor, etc…)
A. Video error
Tuning fail, Picture broken/ Freezing
Normal
Setting
Change satellite setting
(match with installed ANT)
Y
N
☞ A6
Check
S/W Version
Established
date
Revised date
SVC
Bulletin
Y
S/W Upgrade
N
Check
Tuner soldering
4/14
Replace
Main B/D
End
Normal
Picture
Y
End
N
Normal
Picture
Y
End
N
Page 67
Standard Repair Process
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Error symptom
☞A7
Check color by input
- External Input
- COMPONENT
- HDMI/DVI
☞A10
Check Test pattern
Color
error
N
Check error
color input
mode
A. Video error
☞ A8 / A9
※ Check and
replace Link
Y
Cable
(LVDS) and
contact
condition
External
Input/Component
error
Color error
Color
error
N
Check
external
device and
cable
Y
Replace Main B/D
Established
date
Revised date
External
device/Cable
Normal
N
Y
Color
error
End
5/14
Y
Replace module
N
Replace Main B/D
HDMI
error
Check external
device and
cable
Request repair
for external
device/cable
N
External
device/Cable
Normal
Y
Replace Main B/D
Page 68
Standard Repair Process
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A. Video error
Error symptom
Vertical / Horizontal bar, residual image,
light spot, external device color error
Vertical/Horizontal bar, residual image, light spot
☞A7
Check color condition by input
- External Input
- Component/AV
- HDMI
☞A10
Check Test pattern
Replace
module
External device screen error-Color error
Check S/W Version
Check
Version
S/W Upgrade
Screen
normal
N
Y
N
Check external
Y
device
connection
condition
Check screen
condition by input
-External Input
-Component
HDMI/DVI
Screen
Y
normal
N
Request repair
for external
device
External
☞ A8/ A9
Check and
replace Link
Cable
Input
error
Compo
nent
error
Established
date
Revised date
Screen
normal
N
Replace Main B/D
Y
End
Connect other external
device and cable
(Check normal operation of
External Input, Component
and HDMI by connecting
Jig, pattern Generator,
Set-top Box etc.
Screen
N
normal
Y
Request repair for
external device
6/14
Replace
Module
N
Screen
normal
Y
End
Replace
Main B/D
Normal
Screen
Y
End
N
HDMI
error
Connect other external
device and cable
(Check normal operation
of External Input,
Component, HDMI by
connecting Jig, pattern
Generator ,Set-top Box
etc.
Y
Screen
normal
N
Replace
Main B/D
Page 69
Standard Repair Process
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Error symptom
☞A11
Check
Power LED
Stand-By : Red
Power
Y
LED On
N
Check Power cord
was inserted properly
N
Normal
※
Y
B. Power error
☞A12
Check ST-BY 3.5V
No power
DC Power on
by pressing Power Key
On Remote control
☞A4
Measure voltage of each output of Power B/D
Y
Normal
Voltage
Established
date
Revised date
Normal
Operati
on
Y
Normal
Voltage
N
Y
☞A13
Check Power
On ‘”High”
Replace Main B/D
OK
Y
Replace Main B/D
7/14
Replace
Power B/D
End
N
Replace Power B/D
N
Replace Power B/D
Page 70
Standard Repair Process
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Error symptom
Check outlet
Check A/C cord
Check for all 3- phase
power out
Off when on, off while viewing, power auto on/off
Error
N
Y
Fix A/C cord & Outlet
and check each 3
phase out
B. Power error
☞A14
Check Power Off
Mode
☞A13
(If Power Off mode
is not displayed)
Check Power B/D
voltage
※ Caution
Check and fix exterior
of Power B/D Part
CPU
Abnorm
al
Abnorm
al1
Normal
Y
Voltage
N
Replace Power B/D
Established
date
Revised date
Replace Main B/D
Replace Main B/D
Normal
Y
N
Replace Power B/D
8/14
End
* Please refer to the all cases which
can be displayed on power off mode.
Status Power off List Explanation
"POWEROFF_REMOTEKEY" Power off by REMOTE CONTROL
"POWEROFF_OFFTIMER" Power off by OFF TIMER
"POWEROFF_SLEEPTIMER" Power off by SLEEP TIMER
"POWEROFF_INSTOP" Power off by INSTOP KEY
"POWEROFF_AUTOOFF" Power off by AUTO OFF
Normal
"POWEROFF_ONTIMER" Power off by ON TIMER
"POWEROFF_RS232C" Power off by RS232C
"POWEROFF_RESREC" Power off by Reservated Record
"POWEROFF_RECEND" Power off by End of Recording
"POWEROFF_SWDOWN" Power off by S/W Download
"POWEROFF_UNKNOWN" Power off by unknown status except listed case
Abnormal
"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble
"POWEROFF_CPUABNORMAL" Power off by CPU Abnormal
Page 71
Standard Repair Process
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Error symptom
No audio
Screen normal
☞A15
Check user
Menu Audio
Sound Out
C. Audio error
No audio/ Normal video
TV
Speaker
Select TV Speaker
Check
Speaker
connection
Y
N
☞A16
Check audio 13.2V
of Power Board
Replace Power Board and repair parts
Disconn
N
ection
Established
date
Revised date
Normal
Y
Voltage
N
Replace Main Board
9/14
End
Y
Replace Speaker
Page 72
Standard Repair Process
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Error symptom
Check input
signal
-RF
-External Input
signal
C. Audio error
Wrecked audio / discontinuation / noise
Established
date
Revised date
→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
☞A16
Check audio
Voltage (13.2V)
Normal
Y
Voltage
N
Replace Power B/D
Replace Main B/D
Signal
Normal
N
Y
Wrecked Audio/
Discontinuation/Noise
for all audio
Wrecked Audio/
Discontinuation/Noise
only for D-TV
Wrecked Audio/
Discontinuation/Noise
only for Analog
Wrecked Audio/
Discontinuation/Noise
only for External Input
Check and replace
speaker and
connector
Replace Main B/D
Connect and check
other external
device
10/14
End
(When RF signal is not
received)
Request repair to external
cable/ANT provider
(In case of
External Input
signal error)
Check and fix
external device
Normal
N
Audio
Y
Check and fix external device
Page 73
Standard Repair Process
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Error symptom
Remote control(R/C) operating error
☞A17
Check R/C itself
Operation
Check R/C Operating
When turn off light
in room
If R/C operate,
Explain the customer
cause is interference
from light in room.
Normal
Y
Operating
N
Check & Replace
Baterry of R/C
Normal
Operating
Check & Repair
Cable connection
Connector solder
N
D. Function error
Remote control & Local switch checking
Normal
Operating
End
Y
End
N
Y
☞A17
Check 3.5V
On Main B/D
☞A4
Established
date
Revised date
☞A17
Normal
Voltage
Y
Check IR
Output signal
N
Check 13.2V on Power B/D
Replace Main B/D
(Power B/D don’t have problem)
11/14
Replace
Main B/D
Y
Normal
Signal
N
Repair/Replace
IR B/D
Replace R/C
Page 74
Standard Repair Process
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Error symptom
Check
input
signal
Check and fix
external device/cable
Signal
Input
N
Y
D. Function error
External device recognition error
Check technical
information
- Fix information
- S/W Version
Technical
information
Fix in
accordance
with technical
information
Y
N
Established
date
Revised date
External Input
And Component
Recognition error
HDMI, Optical
Recognition error
12/14
Replace Main B/D
Replace Main B/D
Page 75
Standard Repair Process
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Error symptom
Identify
nose type
E. Noise
Circuit noise, mechanical noise
Circuit
noise
Mechanical
noise
※ Mechanical noise is a natural
phenomenon, and apply the 1st level
description. When the customer does not
agree, apply the process by stage.
※ Describe the basis of the description in
“Part related to nose” in the Owner’s Manual.
Check location
of noise
Check location of
noise
Replace Power B/D
OR
Established
date
Revised date
※ When the nose is severe, replace the module
(For models with fix information, upgrade the S/W or
provide the description)
※ If there is a “Tak Tak” noise from the cabinet,
refer to the KMS fix information and then proceed
as shown in the solution manual
(For models without any fix information, provide
the description)
13/14
Page 76
Standard Repair Process
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Error symptom
Zoom part with
exterior damage
F. Exterior defect
Exterior defect
Module
damage
Cabinet
damage
Remote
Controller
damage
Replace module
Replace cabinet
Replace remote controller
Established
date
Revised date
14/14
Stand
damage
Replace stand
Page 77
Contents of Standard Repair Process Detail Technical Manual
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No. Error symptom Content Page Remarks
1
Check LCD back light with naked eye A1
2 LED driver B+ 24V measuring method A2
A. Video error_ No video/Normal audio
3 Check White Balance value A3
4 Power Board voltage measuring method A4
6
TUNER input signal strength checking method A5
A. Video error_ No video/Video lag/stop
7 Version checking method A6
9
10
A. Video error_Color error
11
12
13
A. Video error_Vertical/Horizontal bar,
14 Check Link Cable (LVDS) reconnection condition
residual image, light spot
Connection diagram A7
Check Link Cable (LVDS) reconnection condition
A8
A9
Adjustment Test pattern - ADJ Key A10
Connection diagram A8
A8
A9
15 Adjustment Test pattern - ADJ Key A10
16
Exchange T-Con Board (1) A-1/5
17 Exchange T-Con Board (2) A-2/5
<Appendix>
18
Defected Type caused by T-Con/ Inverter/
Module
19
20 Exchange Module itself (2) A-5/5
Exchange LED driver Board (PSU) A-3/5
Exchange Module itself (1) A-4/5
Page 78
Contents of Standard Repair Process Detail Technical Manual
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No. Error symptom Content Page Remarks
21
Check front display LED A11
22 Check power input Voltage & ST-BY 3.5V A12
B. Power error_No power
23 Checking method when power is ON A13
24 POWER BOARD voltage measuring method A4
B. Power error_Off when on, off while
26
viewing
28
C. Audio error_No audio/Normal video
29
C. Audio error_Wrecked
30
audio/discontinuation
D. Function error_ No response in remote
31
controller, key error
POWER OFF MODE checking method A14
Checking method in menu when there is no audio A15
Voltage and speaker checking method when there
is no audio
Voltage and speaker checking method in case of
audio error
A16
A16
Remote controller operation checking method A17
Page 79
Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error_No video/Normal audio
Check Back Light On with naked eye
Established
date
Revised
date
A1
Power On -> disjoint back case -> check lighting
Page 80
Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error_No video/Normal audio
Power Board to LED back light Voltage
Established
date
Revised
date
A2
1. Measure DC Voltage applying to LED backlight from Power Board.
2. Output DC Voltage from Power Board -> supply to LED backlight.
Check Pin contacting statement and connection statement.
Page 81
Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error_No video/Normal audio
Check White Balance value
Established
date
Revised
date
A3
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 9.
3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm),
re-enter the value after replacing the MAIN BOARD.
Page 82
Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error_No video/ Audio
Power Board voltage measuring method
Established
date
Revised
date
Check D.13.2V , A13.2V (4 ~8 PIN)
12 Pin (Power Board ↔ Main Board)
SMH200-H12S4
1 Power on 2 PDIM#2
3 GND 4 D.13.2V
5 D.13.2V 6 D.13.2V
7 A.13.2V 8 A.13.2V
9 GND 10 GND
11 DRV_ON 12 PDIM#1
A4
Page 83
Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error_Video error, video lag/stop
TUNER input signal strength checking method
MENU Press red key Remote controller signal test
Select channel
Established
date
Revised
date
A5
When the signal is strong, use the
attenuator (-10dB, -15dB, -20dB etc.)
Page 84
Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error_Video error, video lag/stop
LCD-TV Version checking method
Checking SW version method for remote controller for adjustment
Established
date
Revised
date
A6
Press the IN-START with the remote
controller for adjustment
Page 85
Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error _Vertical/Horizontal bar, residual
image, light spot
LCD TV connection diagram (1)
Established
date
Revised
date
A7
As the part connecting to the external input, check the
screen condition by signal
Page 86
Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error_Color error
Check and replace Link Cable(LVDS) and contact condition
Established
date
Revised
date
A8/A9
1. Check and replace LVDS Cable
2. Check LVDS connection condition
Page 87
Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error_Color error
Adjustment Test pattern - ADJ Key
Established
date
Revised
date
A10
You can view 6 types of patterns using the ADJ Key
Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..)
4.Video error (Classification of MODULE or Main-B/D)
Page 88
Appendix : Exchange T-Con Board (1)
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Solder defect, CNT Broken
Solder defect, CNT Broken
Solder defect, CNT Broken
T-Con Defect, CNT Broken
T-Con Defect, CNT Broken
Solder defect, CNT Broken
T-Con Defect, CNT Broken
Solder defect, CNT Broken
Abnormal Power Section
Solder defect, Short/Crack
Abnormal Power Section Solder defect, Short/Crack
Page 89
Appendix : Exchange T-Con Board (2)
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Abnormal Power Section
Solder defect, Short/Crack
Abnormal Power Section
Fuse Open, Abnormal power section
Solder defect, Short/Crack
Abnormal Display
GRADATION
Noise
GRADATION
Page 90
Appendix : Exchange the Module (1)
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Panel Mura, Light leakage
Crosstalk
Panel Mura, Light leakage
Press damage
Press damage
Crosstalk
Un-repairable Cases
In this case please exchange the module.
Press damage
Page 91
Appendix : Exchange the Module (2)
Copyright © 2015 LG Electronics. Inc. All rights reserved.
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Vertical Block
Source TAB IC Defect
Horizontal Block
Gate TAB IC Defect
Horizontal Block
Gate TAB IC Defect
Gate TAB IC Defect
Vertical Line
Source TAB IC Defect
Horizontal Block
Gate TAB IC Defect
Gate TAB IC Defect
Vertical Block
Source TAB IC Defect
Horizontal line
Gate TAB IC Defect
Gate TAB IC Defect
Un-repairable Cases
In this case please exchange the module.
Page 92
Standard Repair Process Detail Technical Manual
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Error symptom
Content
B. Power error _No power
Check front display LED
Established
date
Revised
date
A11
ST-BY condition: Red
Front LED control :
Menu Option Standby Light On/Off
Page 93
Standard Repair Process Detail Technical Manual
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Error symptom
Content
B. Power error _No power
Check power input voltage and ST-BY 3.5V
Established
date
Revised
date
Check D.13.2V (4,5,6 PIN)
12 Pin (Power Board ↔ Main Board)
SMH200-H12S4
A12
1
3
5
7
9
11
Power on
GND
D.13.2V
A.13.2V
GND
DRV_ON
2
4
6
8
10
12
PDIM#2
D.13.2V
D.13.2V
A.13.2V
GND
PDIM#1
Page 94
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Error symptom
Content
B. Power error _No power
Checking method when power is ON
Established
date
Revised
date
A13
Check “power on(Pin 1)” pin is high(about 3.3V)
12 Pin (Power Board ↔ Main Board)
SMH200-H12S4
1
3
5
7
9
11
Power on
GND
D.13.2V
A.13.2V
GND
DRV_ON
2
4
6
8
10
12
PDIM#2
D.13.2V
D.13.2V
A.13.2V
GND
PDIM#1
Page 95
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Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
B. Power error _Off when on, off whiling viewing
POWER OFF MODE checking method
Established
date
Revised
date
A14
Checking order
1. Press the IN-START button of the remote controller for adjustment
2. Check the entry into adjustment item 3.
Page 96
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Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
C. Audio error_No audio/Normal video
Checking method in menu when there is no audio
Established
date
Revised
date
A15
Checking order
1. Press the MENU button on the remote controller
2. Select the AUDIO function of the Menu
3. Select TV Speaker Check
Page 97
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
Established
date
Revised
date
A16
12 Pin (Power Board ↔ Main Board)
②
1
3
5
7
9
11
Power on
D.13.2V
A.13.2V
DRV_ON
SMH200-H12S4
GND
GND
2
4
6
8
10
12
PDIM#2
D.13.2V
D.13.2V
A.13.2V
GND
PDIM#1
Checking order
1. Check the contact condition of or 13.2V connector of Main Board
2. Measure the 13.2V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
3. Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound
when you touch the GND and output terminal, the speaker is normal.
①
③
< Main Ass’y>
Page 98
1
GND
2
KEY1
3
KEY2
4
3.5V_ST
5
GND
6
LED_R
7
IR
8
GND
9
SCL
10
SDA
Standard Repair Process Detail Technical Manual
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
< Sub Ass’y>
①
D. Function error_ No response in remote controller,
key error
Remote controller operation checking method
②
< Main Ass’y>
Established
date
Revised
date
③
④
A17
P4600
Checking order
1, 2. Check IR cable condition between IR & Main board.
3. Check the st-by 3.5V on the terminal 4.
4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog
Tester needle moves slowly, and defective when it does not move at all.
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