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8/10/2019 Lg 42lh40ed[-Sa] 42lh45ed[-Sb] Chassis Lj92j
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LCD TV
SERVICE MANUAL
CAUTIONBEFORE SERVICING THE CHASSIS,READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LJ92J
MODEL : 42LH40ED 42LH40ED-SA
42LH45ED 42LH45ED-SB
North/Latin America http://aic.lgservice.comEurope/Africa http://eic.lgservice.comAsia/Oceania http://biz.lgservice.com
Internal Use Only
Printed in KoreaP/NO : MFL58893601 (0912-REV01)
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LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.Only for training and service purposes
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CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION........................................................................................6
ADJUSTMENT INSTRUCTION ...............................................................14
TROUBLE SHOOTING............................................................................17
BLOCK DIAGRAM...................................................................................58
EXPLODED VIEW .................................................................................. 59
SVC. SHEET ...............................................................................................
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LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.Only for training and service purposes
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SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in theSchematic 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 theservicing of a receiver whose chassis is not isolated from the ACpower line. Use a transformer of adequate power rating as thisprotects the technician from accidents resulting in personal injuryfrom electrical shocks.
It will also protect the receiver and it's components from beingdamaged by accidental shorts of the circuitry that may beinadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposedmetallic parts of the cabinet, such as antennas, terminals, etc., tobe 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 anelectrical jumper across the two AC plug prongs. Place the ACswitch in the on position, connect one lead of ohm-meter to the ACplug prongs tied together and touch other ohm-meter lead in turn toeach exposed metallic parts such as antenna terminals, phone
jacks, etc.If the exposed metallic part has a return path to the chassis, themeasured resistance should be between 1M and 5.2M.When the exposed metal has no return path to the chassis thereading must be infinite.An other abnormality exists that must be corrected before thereceiver is returned to the customer.
Leakage Current Hot Check (See below Figure)Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitorbetween a known good earth ground (Water Pipe, Conduit, etc.)and the exposed metallic parts.Measure the AC voltage across the resistor using AC voltmeterwith 1000 ohms/volt or more sensitivity.Reverse plug the AC cord into the AC outlet and repeat AC voltagemeasurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to0.5mA.In case any measurement is out of the limits specified, there ispossibility of shock hazard and the set must be checked andrepaired before it is returned to the customer.
Leakage Current Hot Check circuit
1.5 Kohm/10W
To InstrumentsexposedMETALLIC PARTS
Good Earth Groundsuch as WATER PIPE,
CONDUIT etc.
AC Volt-meter
When 25A is impressed between Earth and 2nd Groundfor 1 second, Resistance must be less than 0.1*Base on Adjustment standard
IMPORTANT SAFETY NOTICE
0.15uF
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CAUTION: Before servicing receivers covered by this servicemanual and its supplements and addenda, read and follow theSAFETY PRECAUTIONSon page 3 of this publication.NOTE: If unforeseen circumstances create conflict between the
following servicing precautions and any of the safety precautions on
page 3 of this publication, always follow the safety precautions.
Remember: Safety First.
General Servicing Precautions1. 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 polarityinstallation of electrolytic capacitors may result in anexplosion hazard.
2. Test high voltage only by measuring it with an appropriate highvoltage 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 itsassemblies.
4. Unless specified otherwise in this service manual, cleanelectrical contacts only by applying the following mixture to thecontacts with a pipe cleaner, cotton-tipped stick or comparablenon-abrasive applicator; 10% (by volume) Acetone and 90% (byvolume) isopropyl alcohol (90%-99% strength)CAUTION: This is a flammable mixture.Unless specified otherwise in this service manual, lubrication ofcontacts 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 itselectrical assemblies unless all solid-state device heat sinks arecorrectly installed.
7. Always connect the test receiver ground lead to the receiverchassis ground before connecting the test receiver positivelead.Always remove the test receiver ground lead last.
8. Use with this receiver only the test fixtures specified in thisservice manual.
CAUTION: Do not connect the test fixture ground strap to anyheat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily
by static electricity. Such components commonly are calledElectrostatically Sensitive (ES) Devices. Examples of typical ESdevices are integrated circuits and some field-effect transistors andsemiconductor "chip" components. The following techniquesshould be used to help reduce the incidence of componentdamage caused by static by static electricity.1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostaticcharge on your body by touching a known earth ground.Alternatively, obtain and wear a commercially availabledischarging wrist strap device, which should be removed toprevent 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 asaluminum foil, to prevent electrostatic charge buildup orexposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESdevices.
4. Use only an anti-static type solder removal device. Some solderremoval devices not classified as "anti-static" can generateelectrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generateelectrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protectivepackage until immediately before you are ready to install it.(Most replacement ES devices are packaged with leadselectrically shorted together by conductive foam, aluminum foilor comparable conductive material).
7. Immediately before removing the protective material from theleads of a replacement ES device, touch the protective materialto the chassis or circuit assembly into which the device will beinstalled.CAUTION: Be sure no power is applied to the chassis or circuit,and observe all other safety precautions.
8. Minimize bodily motions when handling unpackagedreplacement ES devices. (Otherwise harmless motion such asthe brushing together of your clothes fabric or the lifting of yourfoot from a carpeted floor can generate static electricitysufficient to damage an ES device.)
General Soldering Guidelines1. Use a grounded-tip, low-wattage soldering iron and appropriate
tip size and shape that will maintain tip temperature within therange or 500F to 600F.
2. Use an appropriate gauge of RMA resin-core solder composedof 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall wire-bristle (0.5 inch, or 1.25cm) brush with a metal handle.Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering techniquea. Allow the soldering iron tip to reach normal temperature.
(500F to 600F)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 circuitboard printed foil.
6. Use the following soldering technique.a. Allow the soldering iron tip to reach a normal temperature
(500F to 600F)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 thereonly until the solder f lows onto and around both thecomponent lead and the foil.CAUTION: Work quickly to avoid overheating the circuitboard printed foil.
d. Closely inspect the solder area and remove any excess orsplashed solder with a small wire-bristle brush.
SERVICING PRECAUTIONS
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IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) throughwhich the IC leads are inserted and then bent flat against thecircuit foil. When holes are the slotted type, the following techniqueshould be used to remove and replace the IC. When working withboards using the familiar round hole, use the standard techniqueas outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gentlyprying up on the lead with the soldering iron tip as the soldermelts.
2. Draw away the melted solder with an anti-static suction-typesolder removal device (or with solder braid) before removing theIC.
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 aspossible to the component body.
2. Bend into a "U" shape the end of each of three leads remainingon 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" withlong nose pliers to insure metal to metal contact then soldereach 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 circuitboard.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 aspossible to diode body.
2. Bend the two remaining leads perpendicular y to the circuitboard.
3. Observing diode polarity, wrap each lead of the new diodearound 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 ifnecessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollowstake.
2. Securely crimp the leads of replacement component aroundnotch at stake top.
3. Solder the connections.CAUTION: Maintain original spacing between the replacedcomponent and adjacent components and the circuit board toprevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuitboard will weaken the adhesive that bonds the foil to the circuitboard causing the foil to separate from or "lift-off" the board. Thefollowing guidelines and procedures should be followed wheneverthis condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use thefollowing procedure to install a jumper wire on the copper patternside of the circuit board. (Use this technique only on ICconnections).
1. Carefully remove the damaged copper pattern with a sharpknife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (ifused) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire andcarefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copperpattern and let it overlap the previously scraped end of the goodcopper pattern. Solder the overlapped area and clip off anyexcess jumper wire.
At Other Connections
Use the following technique to repair the defective copper patternat connections other than IC Pins. This technique involves theinstallation of a jumper wire on the component side of the circuitboard.
1. Remove the defective copper pattern with a sharp knife.Remove at least 1/4 inch of copper, to ensure that a hazardouscondition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the patternbreak and locate the nearest component that is directlyconnected 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 leadof the nearest component on the other side.Carefully crimp and solder the connections.CAUTION: Be sure the insulated jumper wire is dressed so theit does not touch components or sharp edges.
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SPECIFICATIONNOTE : Specifications and others are subject to change without notice for improvement .
4. Electrical specification
4.1 General Specification
1. Application rangeThis specification is applied to the LCD TV used LJ92Jchassis.
2. Requirement for TestEach part is tested as below without special appointment.
1) Temperature : 255C (779F), CST : 405C2) Relative Humidity : 6510%3) Power Voltage : Standard input voltage(100~240V@50/60Hz)
* 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 inaccordance with BOM.
5) The receiver must be operated for about 5 minutes prior tothe adjustment.
3. Test method1) Performance: LGE TV test method followed2) Demanded other specification
- Safety: UL, CSA, IEC specification, CE
- EMC: FCC, ICES, IEC specification, CE
No Item Specification Remark1. Receiving System 1) SBTVD / NTSC / PAL-M / PAL-N
2.
Available Channel 1) VHF : 02~132) UHF : 14~693) DTV : 02-694) CATV : 01~135
3. Input Voltage 1) AC 100 ~ 240V 50/60Hz Mark : 110V, 60Hz4. Market Central and South AMERICA
5.Screen Size 42 inch Wide (1920 X 1080)
47 inch Wide (1920 X 1080)42LH40ED-SA47LH40ED-SA
6. Aspect Ratio 16:97. Tuning System FS
8. Module LC420WUE-SBC1 (VITIAZ 4)LC470WUE-SBB1 (VITIAZ4)
42LH40ED-SA47LH40ED-SA
9.Operating Environment 1) Temp : 0 ~ 40 deg
2) Humidity : ~ 80 %
10.Storage Environment 1) Temp : -20 ~ 60 deg
2) Humidity : ~ 85 %
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5. Chromiance & Luminance spec.
No Item Min Typ Max Unit RemarkModule cd/m LC420WUE-SBC11. Max Luminance
(Center 1-point / Full WhitePattern)
Set400 500
400 500 cd/m
2.3.
Luminance uniformity 77 % Full white0.638
0.334
4.5.
RED
0.2900.606
6.7.
GREEN
0.1440.064
8.9.
BLUE
0.27910.
Color
coordinate
WHITE
Y
X
YX
YX
YX
Typ.
-0.03
0.292
Typ.
+0.03
11. Color coordinate uniformity N/A700:1 1000:1 NORMALContrast ratio7000:1 10000:1 DCR
Cool
0.281
0.274 0.276
0.283
0.278
0.285
Standard0.2910.283
0.311
0.2850.293
0.2870.295
12. Color
Temperature
Warm0.327
0.3130.329
0.3150.331
85% Full white pattern** The W/B Tolerance is
0.015 for AdjustmentDynamic contrast : offDynamic color : offOPC : off
13. Color Distortion, DG 10.0 %14. Color Distortion, DP 10.0 deg15. Color S/N, AM/FM 43.0 dB16. Color Killer Sensitivity -80 dBm
6. Component Input (Y, CB/PB, CR/PR)No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock Proposed1. 720*480 15.73 60 13.5135 SDTV ,DVD 480I2. 720*480 15.73 59.94 13.5 SDTV ,DVD 480I3. 720*480 31.47 60 27.027 SDTV 480P4. 720*480 31.47 59.94 27.0 SDTV 480P5. 1280*720 45.00 60.00 74.25 HDTV 720P6. 1280*720 44.96 59.94 74.176 HDTV 720P7. 1920*1080 33.75 60.00 74.25 HDTV 1080I8. 1920*1080 33.72 59.94 74.176 HDTV 1080I9. 1920*1080 67.500 60 148.50 HDTV 1080P10. 1920*1080 67.432 59.939 148.352 HDTV 1080P11. 1920*1080 27.000 24.000 74.25 HDTV 1080P12. 1920*1080 26.97 23.94 74.176 HDTV 1080P13. 1920*1080 33.75 30.000 74.25 HDTV 1080P14. 1920*1080 33.71 29.97 74.176 HDTV 1080P15. 1920*1080 56.25 50.000 148.5 HDTV 1080P
16. 1920*1080 28.125 25.000 74.25 HDTV 1080P
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7. RGB Input (PC)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed
PC DDC
1. 640*350 31.468 70.09 25.17 EGA X
O
O
O
OO
O
O
O
O
O
2. 720*400 31.469 70.08 28.32 DOS
3. 640*480 31.469 59.94 25.17 VESA(VGA)
4. 800*600 35.156 56.25 36.00 VESA(SVGA)
5. 800*600 37.879 60.31 40.00 VESA(SVGA)6. 1024*768 48.363 60.00 65.00 VESA(XGA)
7. 1280*768 47.776 59.870 79.5 CVT(WXGA)
8. 1360*768 47.712 60.015 85.50 VESA (WXGA)
9. 1280*1024 63.981 60.020 108.00 VESA
10. 1600*1200 75.00 60.00 162 VESA (UXGA)
11 1920*1080 67.5 60 148.5 HDTV 1080P
** RGB PC Monitor Range Limits- Min Vertical Freq - 56 Hz- Max Vertical Freq - 62 Hz- Min Horiz. Freq - 30 kHz- Max Horiz. Freq - 80 kHz- Pixel Clock - 170 MHz
8. HDMI Input (PC/DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) ProposedPC DDC
1 640*350 31.468 70.09 25.17 EGA X
OOOOOOO
OOO
2 720*400 31.469 70.08 28.32 DOS3 640*480 31.469 59.94 25.17 VESA(VGA)4 800*600 35.156 56.25 36.00 VESA(SVGA)5 800*600 37.879 60.31 40.00 VESA(SVGA)6 1024*768 48.363 60.00 65.00 VESA(XGA)7 1280*768 47.776 59.870 79.5 CVT(WXGA)8 1360*768 47.712 60.015 85.50 VESA (WXGA)
9 1280*1024 63.981 60.020 108.00 VESA (SXGA)10 1600*1200 75.00 60.00 162 VESA (UXGA)11 1920*1080 66.587 59.934 138.5 HDTV 1080P
DTV1 720*480 31.47 60 27.027 SDTV 480P2 720*480 31.47 59.94 27.00 SDTV 480P3 1280*720 45.00 60.00 74.25 HDTV 720P4 1280*720 44.96 59.94 74.176 HDTV 720P5 1920*1080 33.75 60.00 74.25 HDTV 1080I6 1920*1080 33.72 59.94 74.176 HDTV 1080I7 1920*1080 67.500 60 148.50 HDTV 1080P8 1920*1080 67.432 59.939 148.352 HDTV 1080P9 1920*1080 27.000 24.000 74.25 HDTV 1080P
10 1920*1080 26.97 23.94 74.176 HDTV 1080P11 1920*1080 33.75 30.000 74.25 HDTV 1080P12 1920*1080 33.71 29.97 74.176 HDTV 1080P
17. 1920*1080 56.25 50.000 148.5 HDTV 1080P18. 1920*1080 28.125 25.000 74.25 HDTV 1080P
** HDMI Monitor Range Limits- Min Vertical Freq - 56 Hz- Max Vertical Freq - 62 Hz- Min Horiz. Freq - 30 kHz- Max Horiz. Freq - 80 kHz- Pixel Clock - 170 MHz
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9. Consignment Setting (OUTGOING CONDITION)
10. Mechanical Specification
No Item Condition1. Input Mode TV02CH2. Volume Level 103. Mute Off4. Aspect Ratio 16:95. System Color PAL-M
6 Booster OnPicture Mode Vivid
BacklightContrastBrightnessSharpnessColor 70
70
0
0
10010050
TintColor Temperature Cool
7. Picture
Picture ResetSound Mode StandardAuto Volume OffClear Voice OffSRS TruSurround XT Off
Balance
8. Audio
TV Speaker On
On
Clock Auto9. TimeOff Timer / On TimerSleep Timer / Auto Sleep
Off
Language (Menu/Audio) PortuguesSimpLinkKey Lock Off
OffCaption
10. Option
Set ID 111. Channel Memory RF : 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
14, 30, 51, 63CATV : 15, 16, 17
No. Item Content Unit RemarkWidth (W) Length (D) Height (H) mm
721.31036 296.2
1036 89.8
1330 228
mm With StandBefore Packing
655.4 mm Without Stand1.
ProductDimension
After Packing 770 mm With Stand
19.5kg With StandOnly SET
17.7Kg Without Stand2.ProductWeight
With BOX 24.0kg Kg
Kg
Kg
With Stand
40ft 40ft(H-CUBIC)
Indi. Woo den Indi. Wooden3.
ContainerLoadingQuantity
Individual or Palletizing
270 - 270 -
4. Stand AssySwivel Degree
Swivel ForceSwivel(+/- 20degree)
1.5 Kgf(0.8Kgf ~ 2.5Kgf)5. Appearance General Refer to Standard of LG(56)G4-9002
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ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied all of the LJ91D, LJ92JLCD TV models, which produced in manufacture departmentor similar LG TV factory.
2. Notice
1) Because this is not a hot chassis, it is not necessary to usean isolation transformer. However, the use of isolationtransformer will help protect test instrument.
2) Adjustment must be done in the correct order. But it isflexible when its factory local problem occurs. .
3) The adjustment must be performed in the circumstance of25 5C of temperature and 6510% of relative humidity ifthere is no specific designation.
4) The input voltage of the receiver must keep 100~220V,50/60Hz.
5) Before adjustment, execute Heat-Run for 5 minutes.
After Receive 100% Full white pattern (06CH) then processHeat-run
(or 8. Test pattern condition of Ez-Adjust status) How to make set white pattern
1) Press Power ON button of Service Remocon2) Press ADJ button of Service remocon. Select 8. Test
pattern and, after select White using navigation button,and then you can see 100% Full White pattern.
* In this status you can maintain Heat-Run useless anypattern generator
* Notice: if you maintain one picture over 20 minutes
(Especially sharp distinction black with white pattern 13Ch, or Cross hatch pattern 09Ch) then it can appearimage stick near black level.
3. Adjustment Items
3.1 PCB Assembly adjustment CPLD DOWNLOAD Adjust 480i Comp1 Adjust 1080p Comp1/RGB
- If it is necessary, it can adjustment at Manufacture Line- You can see set adjustment status at 1. ADJUST
CHECK of the In-start menu
3.2 Set Assembly Adjustment EDID (The Extended Display Identification Data ) / DDC
(Display Data Channel) download Color Temperature (White Balance) Adjustment Make sure RS-232C control Selection Factory output option
4. PCB Assembly Adjustment
4.1. CPLD DOWNLOAD : JTAG MODE
4.2. > PIN MAP
Pin JTAG Mode Signal Name2 TCK
3 TMS
8 TDI
11 TDO
13 -
15 VCC
18 TO 25 GND
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4.3. > PIN MAP
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4.4. Using RS-232CAdjust 3 items at 3.1 PCB assembly adjustments 4.1.3
sequence one after the order.
O Adjustment protocol
See ADC Adjustment RS232C Protocol_Ver1.0
O Adjustment protocol- Pattern Generator : (MSPG-925FA)- Adjust 480i Comp1 (MSPG-925FA : model :209 , pattern
: 65)- Adjust 1080p Comp1/RGB(MSPG-925FA:model : 225 ,
pattern : 65)
- Adjust RGB (MSPG-925FA:model :225 , Pattern :65) RGB-PC Mode
* If you want more information then see the below Adjustmentmethod (Factory Adjustment)
O Adjustment sequence- ad 00 00 : Enter the ADC Adjustment mode.- xb 00 40: Change the mode to Component1 (No actions)- ad 00 10: Adjust 480i Comp- ad 00 10: Adjust 1080p Comp- xb 00 60: Change to RGB-PC mode(No action)- ad 00 10: Adjust 1080p RGB- ad 00 90: End of the adjustment
Order Command Set response
1. Inter the ad 00 00 d 00 OK00x
Adjustment mode
2. Change the kb 00 40 b 00 OK40x (Adjust 480i Comp1/1080p Comp1)
Source kb 00 60 b 00 OK60x (Adjust 1080p RGB)
3.Start Adjustment ad 00 10
4.Return the OKx ( Success condition )
Response NGx ( Failed condition )
5.Read (main) (main : component1 480i, RGB 1080p)
Adjustment data ad 00 20 000000000000000000000000007c007b006dx
(main) (main : component1 1080p)
ad 00 30 000000070000000000000000007c00830077x
6.Confirm ad 00 99 NG 03 00x (Failed condition)
Adjustment NG 03 01x (Failed condition)
NG 03 02x (Failed condition)
OK 03 03x (Success condition)
7. End of Adjustment ad 00 90 d 00 OK90x
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5. Factory Adjustment
5.1 Manual Adjust Component 480i/1080pRGB 1080p
O Summary : Adjustment component 480i/1080i and RGB1080p is Gain and Black levelsetting at Analog
to Digital converter, and compensate the RGBdeviation
O Using instrument- Adjustment remocon, 801GF(802B, 802F, 802R) or
MSPG925FA pattern generator (It can output 480i/1080ihorizontal 100% color bar pattern signal, and its outputlevel must setting 0.7V0.1V p-p correctly)
* You must make it sure its resolution and pattern cause everyinstrument can have different setting
O Adjustment method 480i Comp1, Adjust 1080pComp1/RGB (Factory adjustment) ADC 480i Component1 adjustment- Check connection of Component1- MSPG-925FA Model: 209, Pattern 65
Set Component 480i mode and 100% Horizontal ColorBar Pattern(HozTV31Bar), then set TV set toComponent1 mode and its screen to NORMAL
ADC 1080p Component1 / RGB adjustment- Check connection both of Component1 and RGB- MSPG-925FA Model: 225, Pattern 65
Set Component 1080p mode and 100% Horizontal ColorBar Pattern(HozTV31Bar), then set TV set toComponent1 mode and its screen to NORMAL
After get each the signal, wait more a second and enterthe IN-START with press IN-START key of Serviceremocon. After then select 7. External ADC withnavigator button and press Enter.
After Then Press key of Service remocon RightArrow(VOL+)
You can see ADC Component1 Success Component1 1080p, RGB 1080p Adjust is samemethod.
Component 1080p Adjustment in Component1 inputmode
RGB 1080p adjustment in RGB input mode If you success RGB 1080p Adjust. You can see ADC
RGB-DTV Success
5.2 EDID (The Extended Display
Identification Data) / DDC (Display DataChannel) Download.
O Summary It is established in VESA, for communication between
PC and Monitor without order from user for building usercondition. It helps to make easily use realize Plug andPlay function.
For EDID data write, we use DDC2B protocol.
O Auto Download After enter Service Mode by pushing ADJ key, Enter EDID D/L mode.
Enter START by pushing OK key.
Caution: - Never connect HDMI & D-sub Cable when the userdownloading .
- Use the proper cables below for EDID Writing.
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- 14 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.Only for training and service purposes
O Manual Download
Write HDMI EDID data- Using instruments
=> Jig. (PC Serial to D-Sub connection) for PC, DDCadjustment.
=> S/W for DDC recording (EDID data write andread)
=> D-sub jack=> Additional HDMI cable connection Jig.
- Preparing and setting.=> Set instruments and Jig. Like pic.5), then turn on
PC and Jig.=> Operate DDC write S/W (EDID write & read)=> It will operate in the DOS mode.
Pic.3) For write EDID data, setting Jig and another instruments.
EDID data for LJ91D Chassis (Model name = LG TV)- HDMI-1 EDID table (0x33, 0x2C)
- HDM2 EDID table (0x33, 0x1C)
- HDMI-3 EDID table (0x33, 0x0C)
- Analog (RGB) EDID table (0x9B, 0x25)
PC
Download jig
RGB cable
Main
B/D
Edid data and Model option download (RS232)
NO Item CMD 1 CMD 2 Data 0
Enterdownload MODE
DownloadMode In A E 0 0
When transfer the Mode In ,
Carry the command.
Edid data andModeloption
downloadDownload A E *Note1 *Note2
Automatically download
(The use of a internal Data)
Adjust Mode Out A E 9 0
AdjustmentConfirmation A E 9 9
To check Downloadon Assembly line.
See Working Guide if you want more information aboutEDID communication.
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5.3 Adjustment Color Temperature(Whitebalance)
O Using Instruments Color Analyzer: CA-210 (CH 9)
- Using LCD color temperature, Color Analyzer (CA-210)must use CH 9, which Matrix compensated (White, Red,Green, Blue compensation) with CS-2100. See theCoordination bellowed one.
Auto-adjustment Equipment (It needs when Auto-adjustment It is availed communicate with RS-232C :Baud rate: 115200)
Video Signal Generator MSPG-925F 720p, 216Gray(Model: 217, Pattern 78)
O Connection Diagram (Auto Adjustment) Using Inner Pattern
Using HDMI input
.
O White Balance AdjustmentIf you cant adjust with inner pattern, then you can adjustit using HDMI pattern. You can select option at "Ez-AdjustMenu 7. White Balance" there items "NONE, INNER,HDMI". It is normally setting at inner basically. If you cantadjust using inner pattern you can select HDMI item, andyou can adjust.
In manual Adjust case, if you press ADJ button of service
remocon, and enter "Ez-Adjust Menu 7. WhiteBalance", then automatically inner pattern operates. (Incase of "Inner" originally "Inner" will be selected.
Connect all cables and equipments like Pic.5) Set Baud Rate of RS-232C to 115200. It may set
115200 orignally. Connect RS-232C cable to set Connect HDMI cable to set
RS-232C Command (Commonly apply)
wb 00 00 White Balance adjustment start.wb 00 10 Start of adjust gain (Inner white
pattern)wb 00 1f End of gain adjustwb 00 20 Start of offset adjust(Inner white
pattern)wb 00 2f End of offset adjustwb 00 ff End of White Balance adjust(Inner
pattern disappeared)
"wb 00 00": Start Auto-adjustment of white balance. "wb 00 10": Start Gain Adjustment (Inner pattern) "jb 00 c0" : "wb 00 1f": End of Adjustment
* If it needs, offset adjustment (wb 00 20-start, wb 002f-end)
"wb 00 ff": End of white balance adjustment (innerpattern disappear)
- 15 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.Only for training and service purposes
CA-100+
C O L O R
A N A L Y Z E R
T Y P E ; C A - 10 0+
F u l l W h i t e P a t t er n
RS-232C
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- 16 - LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.Only for training and service purposes
O White Balance Adjustment (Manual adjustment) Test Equipment: CA-210
- Using LCD color temperature, Color Analyzer (CA-210) must use CH 9, which Matrix compensated(White, Red, Green, Blue compensation) with CS-2100. See the Coordination bellowed one.
Manual adjustment sequence is like bellowed one.- Turn to "Ez-Adjust" mode with press ADJ button of
service remocon.
- Select "10.Test Pattern" with CH+/- button and pressenter. Then set will go on Heat-run mode. Over 30minutes set let on Heat-run mode.
- Let CA-210 to zero calibration and must has gap more10cm from center of LCD module when adjustment.
- Press "ADJ" button of service remocon and select"7.White-Balance" in "Ez-Adjust" then press " "button of navigation key.
(When press " " button then set will go to full whitemode)
- Adjust at three mode (Cool, Medium, Warm)- If "cool" modeLet B-Gain to 192 and R, G, B-Cut to 64 and thencontrol R, G gain adjustment High Light adjustment.
- If "Medium" and "Warm" modeLet R-Gain to 192 and R, G, B-Cut to 64 and thencontrol G, B gain adjustment High Light adjustment.
- All of the three modeLet R-Gain to 192 and R, G, B-Cut to 64 and thencontrol G, B gain adjustment High Light adjustment.
- With volume button (+/-) you can adjust.- After all adjustment finished, with Enter ( key) turn
to Ez-Adjust mode. Then with ADJ button, exit fromadjustment mode
Attachment: White Balance adjustment coordination and colortemperature.
O Using CS-1000 Equipment.
- COOL : T=11000K, uv=0.000, x=0.276 y=0.283- MEDIUM : T=9300K, uv=0.000, x=0.285 y=0.293
- WARM : T=6500K, uv=0.000, x=0.313 y=0.329
5.4 Test of RS-232C control.Press In-Start button of Service Remocon then set the 4.BaudRate to 115200. Then check RS-232C control and
5.5 Selection of Country option.Selection of country option is allowed only North American model(Not allowed Korean model). It is selection of Country aboutRating and Time Zone.
Models: All models which use LA75A Chassis (See the firstpage.) Press In-Start button of Service Remocon, then enter the
Option Menu with PIP CH- Button Select one of these three (USA, CANADA, MEXICO)
defends on its market using Vol. +/-button.
6. GND and ESD Testing
6.1 Prepare GND and ESD Testing. Check the connection between set and power cord
6.2 Operate GND and ESD auto-test. Fully connected (Between set and power cord) set enterthe Auto-test sequence.
Connect D-Jack AV jack test equipment. Turn on Auto-controller(GWS103-4) Start Auto GND test. If its result is NG, then notice with buzzer. If its result is OK, then automatically it turns to ESD Test. Operate ESD test If its result is NG, then notice with buzzer. If its result is OK, then process next steps. Notice it with
Good lamp and STOPER Down.
6.3 Check Items. Test Voltage
- GND: 1.5KV/min at 100mA- Signal: 3KV/min at 100mA
Test time: just 1 second. Test point
- GND test: Test between Power cord GND and Signalcable metal GND.
- ESD test: Test between Power cord GND and Live andneutral.
Leakage current: Set to 0.5mA(rms)
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
1. Power-Up Boot Fail Trouble Shooting
Replace Power board
N Y
Check Micom IC407
Redownload or replace
Check P800 All Voltage Level
(20V, 12V, 5V_ST)Check Power connector
Y
Check Voltage Level 3.3V at L815N Replace one of
IC807/IC802/L815/L823/L810/L826
& Recheck
Y
N
Check Voltage Level 2.5V at L827N Replace one of IC803/L824/L827
& Recheck
N
Y
Check Voltage Level 1.8V
at IC804 #6 pin
N Replace one of IC804/L825
& Recheck
N
Y
Check Voltage Level 1.2V at L803N Replace one of
IC809/IC800/L803/L816/L819/L801
& Recheck
N
Y
Check X201 Clock 54MHzN
Replace X201
Y
Check signal transition
at IC101 #9 pin
N
Maybe BCM3556 has troubles
Replace IC101 Flash Memory
Y
Check All Voltage Level
at L804/L807/L808
N Replace one of L804/L807/L808
& Recheck
Y
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
2. No OSD Trouble Shooting
Replace Power board
N YCheck 12V Voltage Level
at P800 #13 PinCheck Power connector
Y
Check 12V Voltage Level at L903N Replace one of
Q900/Q901/Q902/L903
& Recheck
Y
Check P903
#16(TXAC-), #17(TXAC+),
#32(TXBC-), #33(TXBC+)
N
Y
Check LVDS CableN
Replace Cable
Y
Check Voltage LCD Module
Check 12V Voltage Level
at L902
N Replace one of L804/L902
& Recheck
Y
Maybe BCM3556(IC100)
has troubles
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
3. Digital TV Video Trouble Shooting
Check RF Cable
Y
Check TP Clock, Data, Sync
R1111, R1103, R1102
N Maybe Tuner(TU1100) has
problems
Y
Maybe BCM3556(IC100)
has problems
Check Tuner(TU1100) Power
(5.0V, 2.5V, 3.3V, 1.2V)
N Replace one of
L1111/L1101/L1102/L1103/L1104
& Recheck
Y
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
4. Analog TV Video Trouble Shooting
Check RF Cable
Y
Check CVBS Signal
TU1100 #9 Pin
N
Y
Check CVBS Signal
CXA2069(IC1102) #62 Pin
N Replace one of
C1160/R1139/C1128
& Recheck
Y
Check CVBS Signal
CXA2069(IC1102) #53 Pin
N Replace CXA2069(IC1102)
& Recheck
Y
Check CVBS Signal
C137
N Replace one of
R1190/Q1110/R195/C137
& Recheck
Y
N
Y
Check Tuner Power
(5.0V, 2.5V, 3.3V, 1.2V)
Replace one of
L1111/L1101/L1102/L1103/L1104
& Recheck
Maybe Tuner(TU1100) has
problems
Maybe BCM3556(IC100)
has problems
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
5. Component Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check Component Jack JK700N
Y
Check Component Signal
R774, R775, R776
R777, R778, R779
N Replace one of
R774/R775/R776/L700/L701/L702
R777/R778/R779/L703/L704/L705
& Recheck
Y
Check Component Signal
C127, C128, C129
C130, C131. C132
N Replace it
Y
Y
Check Component Cable
Replace Jack
Maybe BCM3556(IC100)
has problems
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
6. RGB Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check RGB Jack JK701N
Y
Y
Check RGB Cable
Replace Jack
Check RGB Signal
L706, L707, L708
NReplace It & Recheck
Y
Check Sync Signal
IC1701 #11, #3
N Replace one of R747/R751/IC701
& Recheck
Y
Check EEPROM (IC700)N Replace it or re-burn
& Recheck
Y
Maybe BCM3556(IC100)
has problems
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
7. AV Video Trouble Shooting
Y
Check Jack JK700/JK704N
Y
Check CVBS Signal
CXA2069(IC1102) #1 Pin
CXA2069(IC1102) #22 Pin
N
Y
Check CVBS Signal
CXA2069(IC1102) #53 Pin
NReplace IC1102 & Recheck
Y
Check CVBS Signal
C137
N Replace one of
R1190/Q1110/R195/C137
& Recheck
Y
Y
Replace Jack
Maybe BCM3556(IC100)
has problems
Check Signal Format
Is it supported signal?
Check AV Cable
Replace one of
R721/R1142/C1134
R760/R1161/C1149
& Recheck
Checl IC1102 Power Level 9Vat L1110
N Replace It
Y
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
8. HDMI Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check HDMI Jack
JK500, JK501, JK503
N
Y
Y
Check HDMI Cable
Replace Jack
Check IC601 Voltage Level
+1.8V_HDMI, +3.3V_HDMI
N Replace one of
L601/L602/R665/R663
Y
Check I2C Signal
R670/R671/R605/R606/R616/R617
/R639/R642
NReplace It & Recheck
Y
Maybe BCM3556(IC100)
has problems
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
9. All Source Audio Trouble Shooting
Make sure you cant hear any audio
Y
Check Connector P500N
Y
Y
Check Speaker
Replace Connector
Check Signal
L504, L506
N Replace one of
L508/L509/L510/L511/L504/L506
& Recheck
Y
Check IC500 Power
20V, 3.3V, 1.8V
L500,L501,L502,L503,IC504
NReplace It & Recheck
Y
Check BCM3556 I2S Output
R148, R149, R150
NReplace It & Recheck
Y
Maybe BCM3556(IC100)
has problems
Replace SpeakerN
N Maybe NTP3100 has problems.
Replace It
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
10. Digital TV Audio Trouble Shooting
Check video output
Y
Follow procedure All source audio
trouble shooting
Maybe BCM3556 internal audio
DSP has problems. Replace It
N
Follow procedure digital TV video
trouble shooting
N
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
11. Analog TV Audio Trouble Shooting
Follow procedure analog TV video
trouble shooting
NCheck video output
Y
Check SIF Signal
TU1100 #8 Pin
N
Y
N
Y
Check SIF Signal
C141
N Replace one of R113/C141
& Recheck
Y
Follow procedure All source audio
trouble shooting
N Maybe BCM3556 audio block has
problems. Replace It
N
Y
Check Tuner Power
(5.0V, 2.5V, 3.3V, 1.2V)
Replace one of
L1111/L1101/L1102/L1103/L1104
& Recheck
Maybe Tuner(TU1100) has
problems
Replace one of
L505/L514/C502/C511/Q500/Q502
IC501 & Recheck
Check SIF Signal
IC501 #4 Pin
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
12. Component / RGB / AV Audio Trouble Shooting
Y
Check Jack JK700/JK703/JK704N
Y
Check Signal
CXA2069 #9, #11 Pin (Comp1)
CXA2069 #16, #18 Pin (Comp2)
CXA2069 #29, #31 Pin (RGB)
CXA2069 #2, #4 Pin (AV1)
CXA2069 #23, #25 Pin (AV2)
N
Replace Jack
Check Video Output
Replace one of
C1143/R1156/C1142/R1155
C1141/R1154/C1140/R1153
C1152/R1176/C1151/R1175
C1126/R1140/C1127/R1141
C1154/R1182/C1155/R1183
& Recheck
N Follow procedure external input
video trouble shooting
Y
Check Signal
CXA2069(IC1102) #52, #54 Pin
N
Y
Check Signal
C204, C205
N Replace one of
Q1100/Q1102/R202/C204/
R203/C205& Recheck
Checl IC1102 Power Level 9V
at L1110
NReplace It
Y
Replace IC1102 & Recheck
Y
Follow procedure All source audio
trouble shooting
N Maybe BCM3556 audio block has
problems. Replace It
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
13. HDMI Audio Trouble Shooting
Check video output
Y
Follow procedure All source audio
trouble shooting
N
Y
Re-download EDID data
Maybe BCM3556 audio block has
problems. Replace it
NFollow procedure HDMI video
trouble shooting
NReplace IC601
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
14. USB Trouble Shooting
Exception
- USB power could be disabled by inrushing current
- In this case, remove the device and try to reboot the TV (AC power off/on)
Check USB 2.0 Cable
Y
Check JK201N
Y
Y
Check USB device
If devuce is 2.5 inch HDD,
Check power adaptor
Replace Jack
Check 5V voltage level at L205N Replace one of
L205/IC3400 & Recheck
Y
Maybe BCM3556(IC100)
has problems. Replace It.
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N
Y
Check Wafer P1201N
Replace It
Y
Check 1.8V voltage level
At IC1201 #2 Pin
N
Y
Check 25MHz Clock Frequency
at X1200
NReplace It
Y
Maybe IC1200 has problems
Replace It.
Check HDDN
Replace HDD
Y
Replace It
15. Digital TV Recording Fail Trouble Shooting
Check video/audio outputFollow procedure digital TV
video/audio trouble shooting
N Maybe BCM3556(IC100) USB
block has problems. Replace It.
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Y
N
Y
Check CVBS Signal
C1007
N Replace one of
R1151/Q1106/R1149/C1007
& Recheck
Y
Check SIF Signal
C1015
N
Replace CXA2069(IC1102)
& Recheck
Y
Check TP Clock, Data, Sync
R1313/R1305/R1307
N Re-Download PLD(IC1302) or
Replace it
Y
N
Y
Check Digital TV recordingFollow Digital TV recording fail
trouble shooting
Check 3.3V voltage level
at L1002/L1004
16. Analog TV Recording Fail Trouble Shooting
NFollow procedure analog TV
video/audio trouble shootingCheck video/audio output
Check CVBS Signal
CXA2069(IC1102) #41 Pin
Replace one of
L507/L518/C510/C549/Q501/Q503
IC503/C1015 & Recheck
NReplace it
Y
Check 2.6V voltage level
at L820
N Replace one of
L821/Q804/L820
Y
Check 1.2V voltage level
at
L1000/L1001/L1003/L1005/L1006
NReplace It
Y
Y
Maybe BCM3556(IC100) has some
problems. Replace It.
Reburn or replace IC1303
Check 54MHz Clock
at X1000
Check Signal Level 5V
at R1022
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Y
N
Y
Check CVBS Signal
C1070
N Replace one of
R1150/Q1105/R1145/C1070
& Recheck
Y
Check SIF Signal
C1015
N
Replace CXA2069(IC1102)
& Recheck
Y
N
Y
N
Y
Check Digital TV recordingFollow Digital TV recording fail
trouble shooting
Check 3.3V voltage levelat L1002/L1004
NFollow procedure AV video/audio
trouble shootingCheck video/audio output
Check CVBS Signal
CXA2069(IC1102) #44 Pin
Replace one of
L507/L518/C510/C549/Q501/Q503
IC503/C1015 & Recheck
NReplace it
Y
Check 2.6V voltage level
at L820
N Replace one of
L821/Q804/L820
Check 1.2V voltage level
at
L1000/L1001/L1003/L1005/L1006
Y
Y
Maybe BCM3556(IC100) has some
problems. Replace It.
Reburn or replace IC1303
Check 54MHz Clock
at X1000
Check Signal Level 5V
at R1022
17. AV Video Recording Fail Trouble Shooting
Check Signal
CXA2069(IC1102) #43, #45 Pin
Check Signal
R1008/R1009
N Replace one of
Q1107/Q1108/C1035/
C1037/R1008/R1009 & Recheck
Replace IC1102 & Recheck
Y
Y
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Check RF Cable
Y
Check TP Clock, Data, Sync
R1115, R1114, R1118
N Maybe Tuner(TU1101) has
problems
Y
Maybe BCM3556(IC100)
has problems
Check Tuner(TU1101) Power
(5.0V, 2.5V, 3.3V, 1.2V)
N Replace one of
L1106/L1105/L1107/L1109
& Recheck
Y
18. Digital TV Video Trouble Shooting while recording (Watch & Record)
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Check video output
Y
Follow procedure All source audio
trouble shooting
Maybe BCM3556 internal audio
DSP has problems. Replace It
N
Follow procedure digital TV video
trouble shooting while recording
(watch & record)
N
19. Digital TV Audio Trouble Shooting while recording (Watch & Record)
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
Check RF Cable
Y
Check CVBS Signal
TU1100 #7 Pin
N
Y
Check CVBS Signal
CXA2069(IC1102) #30 Pin
N Replace one of
C1159/R1161/C1149
& Recheck
Y
Check CVBS Signal
CXA2069(IC1102) #53 Pin
N Replace CXA2069(IC1102)
& Recheck
Y
Check CVBS Signal
C137
N Replace one of
R1190/Q1110/R195/C137
& Recheck
Y
Y
Maybe Tuner(TU1101) has
problems
Maybe BCM3556(IC100)
has problems
20. Analog TV Video Trouble Shooting while recording (Watch & Record)
Check Tuner(TU1101) Power
(5.0V, 2.5V, 3.3V, 1.2V)
N Replace one of
L1106/L1105/L1107/L1109
& Recheck
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Copyright 2009 LG Electronics. Inc. All right reserved.Only for training and service purposes
Follow procedure analog TV video
trouble shooting while recording
NCheck video output
Y
Check SIF Signal
TU1100 #6 Pin
N
Y
N
Y
Check SIF Signal
C141
N Replace one of R113/C141
& Recheck
Y
Follow procedure All source audio
trouble shooting
N Maybe BCM3556 audio block has
problems. Replace It
Y
Maybe Tuner(TU1100) has
problems
Replace one of
L512/L514/C550/C553/Q504/Q506
Q508/IC501 & Recheck
Check SIF Signal
IC501 #4 Pin
21. Analog TV Audio Trouble Shooting while recording (Watch & Record)
Check Tuner(TU1101) Power
(5.0V, 2.5V, 3.3V, 1.2V)
N Replace one of
L1106/L1105/L1107/L1109
& Recheck
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LGE Internal Use OnlyCopyright LG Electronics. Inc. All right reserved.
Only for training and service purposes- 59 -
300
200
801
200T
120 1
21
122
500
330
510
805
804
803
802
806
550
900
530
540
400
521
A2
A10
LV1
EXPLODED VIEW
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 X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
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THE
SYMBOLMARKOFTHISSCHE
METICDIAGRAMINCORPORATES
SPECIALFEATURESIMPORTANTFORPROTECTIONFROMX-RADIATION.
FILREANDELECTRICALSHOCKHAZ
ARDS,WHENSERVICING
IFIS
ESSENTIALTHATONLYMANUFATUR
ESSPECFIEDPARTSBEUSEDFOR
THECRITICALCOMPONENTSINTHE
SYMBOLMARKOFTHESCHEMETIC.
LVDS
_TX
_OUT
_TA3+
10:D
1
LVDS
_TX
_OUT
_TB3-
10:D
2
BCMPWM
_VBR
_B
P901
GIL-G-03-S3T2
ENG
1 2 3
LVDS
_TX
_OUT
_TB3+
10:D
2
LVDS
_TX
_OUT
_TAC+
10:D
2
LVDS
_TX
_OUT
_TAC-
10:D
2
+12
.0V
LVDS
_TX
_OUT
_TB1+
10:D
2
LVDS
_TX
_OUT
_TB4-
10:D
2
R905
0
OPT
LVDS
_TX
_OUT
_TBC-
10:D
2
LVDS
_TX
_OUT
_TA1+
10:D
1
R9330
OPT
LVDS
_TX
_OUT
_TB4+
10:D
2
L903CB3216PA501E
OPC
_OUT
R941
0
OPC
_EN
LVDS
_TX
_OUT
_TA2-
10:D
1
GND
LVDS
_TX
_OUT
_TBC+
10:D
2
LVDS
_TX
_OUT
_TA1-
10:D
1
OPC
_EN
LVDS
_TX
_OUT
_TB2+
10:D
2
C912
1000p
F50V
GND
LVDS
_TX
_OUT
_TA0-
10:D
1
C913
0.1
uF
50V
C914
22u
F
16V
GND
R9380
R934
0
OPC
_EN
R942
0
R940
0
OPC
_EN
LVDS
_TX
_OUT
_TA4-
10:D
2
LVDS
_TX
_OUT
_TA3-
10:D
1
GND
LVDS
_TX
_OUT
_TA2+
10:D
1
LVDS
_TX
_OUT
_TB0+
10:D
2
LVDS
_TX
_OUT
_TB0-
10:D
2
LVDS
_TX
_OUT
_TA4+
10:D
1
+12.0V
_LCD
LVDS
_TX
_OUT
_TB1-
10:D
2
R9370
OPT
LVDS
_TX
_OUT
_TA0+
10:D
1
D3
.3V
LVDS
_TX
_OUT
_TB2-
10:D
2
B
IT_
SEL
LVDS
_SEL
R935499
R9043.3K
OPT
R9363.3K
OPTR931
0 OPT
P903
TF05-5
1S
1 2 3 4 5 6 7 8 910
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
+12
.0V
_LCD
+12
.0V
_LCD
LVDS
_SEL
BIT
_SEL
V4Pull-Uplis
t
OPC_
EN:500Ohm
LVDS_
SEL/BIT_
SE:3
.3k
LVDS_
SEL
R938:VESA
R936:JEIDA
Copyright LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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THE
SYMBOLMARKOFTHISSCHEMETICDIAGRAMINCORPORATES
SPECIALFEATURESIMPORTANTFORPROTECTIONFROM
X-RADIATION.
FILREANDELECTRICALSHOCKHAZARDS,WHENSERVIC
ING
IFIS
ESSENTIALTHATONLYMANUFATURESSPECFIED
PARTS
BEUSEDFOR
THECRITICALCOMPONENTSIN
THE
SYMBOLMARKOF
THESCHEMETIC.
R424
220
R426
4.7
K
C424
0.1uF
GND
IC404
AZ1117H-
3.3
2
OUTPUT
3
INPUT
1
ADJ/GND
R429
22
R436 3
3K
R435
4.7K
GND
+5.0
V_
ST
C430
0.1uF
R418
4.7
K
R4501K
GND
C405
22uF
UCOM
_RX
14:R8
R440
100
R433
4.7K
R4005
1K
R460
4.7K
LED_POWER_ON
R4006
4.7
K
C431
0.1uF
C426
0.1uF
+3.3
V_
ST
R421
22
R404100
R417
100
R415
100
R437
22
+3.3
V_
ST
GND
/W_
PROTECT
1:I7
R425
4.7
K
R430
22
R449
4.7K
OPT
C425
0.1uF
R42347K
IC406
M24C16-WMN6T
3
3
2
2
4
4
1
1
5
5
6
6
7
7
8
8
GND
+3.3
V_
ST
R431
4.7
K
R456
33K
R428 4.7K
C427
22pF
R439100
RL
_ON
4:D7;14:X19
C404
10uF
Q400
2SC3052
E
B
C
OPC_EN
7:E2
KEY1
14:AA25
IC405
KIA7029AF
2G
3
O
1
I
R438
22
R4551K
C423
0.1uF
R416
1K
X400
24MHz
LED_WARM_STBY
SDA3_3.3V9:I4
+3.3
V_
ST
Q401
RT1N141C-T112-1
E
B
C
ERROR_OUT4:C5
SCL3_3.3V
9:I4
R40322
MUTE1
3:D4
R414
0
OPT
R407
4.7
K
R400100
D3.3
V
HDMI_CEC
2:AD27
R42710K
R402
100
R459
22
R401
100
R452 4
.7K
R451
4.7K
R442
4.7K
C428
22pF
GND
LVDS
_PANEL
_CTRL
4:G1
R453
68K
R4541K
KEY2
14:AA25
C429
0.1uF
MICOM
_RESET
3:A6
GND
R413
0
C422
0.1uF
IR
1:C1;14:U23
R434
15K
+5.0
V_
ST
GND
R448
4.7
K
GND
GND
DDC
_SCL
1:J7
+3.3
V_
ST
+3.3
V_
ST
+5.0
V
GND
DDC
_SDA
1:J7
+3.3
V_
ST
R420
22
IC
407
MT
V416GMF
1
HSYNC/P1.5
2
VSYNC/P1.6
3
P1.7
/SOGI
4
RST
5
HSCL1/P3.0
/RXD
6
P4.3
/AD3
7
HSDA1/P3.1
/TXD
8
P3.2
/INT0
9
P3.3
/INT1
10
ISDA/P3.4
/T0
11
ISCL/P7.5
12 HSDA2/P7.4
13 HSCL2/P7.3
14 X2
15 X1
16 VSS
17 P4.0/AD0
18 P6.0/CLKO1
19 P6.1
20 P6.2
21 P6.3
22 P6.4
23
P6.5
24
P6.6
25
P6.7
26
P7.2
/HCLAMP
27
P7.1
/VBLANK
28
P4.1
/AD1
29
P7.0
/HBLANK
30
P5.7
/CLKO2
31
P5.6
32
P5.5
33
P5.4
34P5.335P5.236P5.1
37P5.0
38VDD
39P4.2/AD2
40P1.0/ET241P1.1/DA0
42P1.2/DA1
43P1.3/DA2
44P1.4/DA3
GND
INV
_ON/OFF
4:C6
GND
EYEQ_SDA_3.3V
R462100
EYEQ_SCL_3.3V
R461100
+3.3
V_
ST
R432
220
UCOM
_TX
14:X6
+12.0
V
Q460
2SC3052
OPT
E
B
C
R469
OPT
R470
OPT
R472
10K
Q461
2SC3052
OPT
E
B
C
R480
15K
R474
OPT
+20.0
V
+3.3
V_
ST
R473
OPT
R467
OPT
R475
30K
1/10W
1%
R468
OPT
POWER
_DET
R476
5.1
K
1/10W
5%
R477
OPT
R471
OPT
+5.0
V
POWER
_DET
9:A7;B3
R481
7.5
K
R4009
0OPT
R4010
0
IC460
NCP803SN293
1GND3
VCC
2
RESET
R463
2K
R464
2K
C415
0.1uF
C417
0.1uF
C418
0.1uF
R441100
R443
33K
+5.0
V_
ST
PDP:
LCD:
AI_ON/OFF
POD
3.3V_
VDDP_
ST,MICOM
POWERDETECT
Copyright LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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THE
SYMBOLMARKOFTHISSCHEMETICDIAGRAMINCORPORATES
SPEC
IALFEATURESIMPORTANTFOR
PROTECTIONFROMX-RADIATION.
FILRE
AND
ELECTRICALSHOCKHAZARDS,WHEN
SERVICING
IFIS
ESSENTIALTHATONLYMANUFATURESSPECFIEDPARTSBEUSEDFOR
THEC
RITICALCOMPONENTSINTHE
SYMBOLMARKOFTHESCHEMETIC.
C2003
0.1uF
C24
7
0.1uF
C286
33uF
C249
4.7uF
D3.3
V
A3.3
V
C283
1000pF
C278
4.7uF
C297
4.7uF
C245
4.7uF
C2006
0.0
1uF
C287
33uF
C270
0.1uF
C2005
0.0
1uF
D1.8
V
D1.8
V
C281
1000pF
C256
0.1uF
C265
0.1uF
D1.2
V
C285
0.0
1uF
C280
4.7uF
C243
0.1uF C
248
1
000pF
C263
4.7uF
C289
0.1uF
C272
0.1uF
C275
0.1uF
D3.3
V
D1.2
V
C2004
33uF
C261
0.1uF
C294
0.1uF
D3.3
V
C267
0.0
1uF
C284
0.0
1uF
D1.8
V
C282
1000pF
C216
0.1uF
C276
0.1uF
C252
0.1uF
C257
0.0
1uF
D1.2
V
C255
0.1uF
C264
0.1uF
C292
0.1uF
C259
0.1uF
C246
0.1uF
C290
0.1uF
C244
0.1uF
C251
0.1uF
C254
0.1uF
C266
0.1uF
C253
0.1uF
C262
0.1uF
C258
0.1uF
C250
0.1uF
C288
0.1uF
IC100
BCM3556
DVSS
_1
AD5
DVSS
_2
AD6
DVSS
_3
J7
DVSS
_4
K7
DVSS
_5
L7
DVSS
_6
M7
DVSS
_7
AB7
DVSS
_8
AC7
DVSS
_9
G8
DVSS
_10
D9
DVSS
_11
AA9
DVSS
_12
G10
DVSS
_13
A11
DVSS
_14
L11
DVSS
_15
M11
DVSS
_16
N11
DVSS
_17
P11
DVSS
_18
R11
DVSS
_19
T11
DVSS
_20
U11
DVSS
_21
V11
DVSS
_22
D12
DVSS
_23
G12
DVSS
_24
L12
DVSS
_25
M12
DVSS
_26
N12
DVSS
_27
P12
DVSS
_28
R12
DVSS
_29
T12
DVSS
_30
U12
DVSS
_31
V12
DVSS
_32
L13
DVSS
_33
M13
DVSS
_34
N13
DVSS
_35
P13
DVSS
_36
R13
DVSS
_37
T13
DVSS
_38
U13
DVSS
_39
V13
DVSS
_40
G14
DVSS
_41
L14
DVSS
_42
M14
DVSS
_43
N14
DVSS
_44
P14
DVSS
_45
R14
DVSS
_46
T14
DVSS
_47
U14
DVSS
_48
V14
DVSS
_49
L15
DVSS
_50
M15
DVSS
_51
N15
DVSS
_52
P15
DVSS
_53
R15
DVSS
_54
T15
DVSS
_55
U15
DVSS
_56
V15
DVSS
_57
A16
DVSS
_58
G16
DVSS
_59
L16
DVSS
_60
M16
DVSS
_61
N16
DVSS
_62
P16
DVSS
_63
R16
DVSS
_64
T16
DVSS
_65
U16
DVSS
_66
V16
DVSS
_67
AA16
DVSS
_68
D17
DVSS
_69
L17
DVSS
_70
M17
DVSS
_71
N17
DVSS
_72
P17
DVSS
_73
R17
DVSS
_74
T17
DVSS
_75
U17
DVSS
_76
V17
DVSS
_77
AA17
DVSS
_78
AC19
DVSS
_79
G18
DVSS
_80
L18
DVSS
_81
M18
DVSS
_82
N18
DVSS
_83
P18
DVSS
_84
R18
DVSS
_85
T18
DVSS
_86
U18
DVSS
_87
V18
DVSS
_88
D20
DVSS
_89
G20
DVSS
_90
H20
DVSS
_91
A21
DVSS
_92
E21
DVSS
_93
F21
DVSS
_94
G21
DVSS
_95
E22
DVSS
_96
F22
DVSS
_97
G22
DVSS
_98
H22
DVSS
_99
J22
DVSS
_100
K22
DVSS
_101
L22
DVSS
_102
M22
DVSS
_103
N22
DVSS
_104
P22
DVSS
_105
R22
DVSS
_106
T22
DVSS
_107
U22
DVSS
_108
V22
DVSS
_109
W22
DVSS
_110
Y22
DVSS
_111
AA22
DVSS
_112
W23
DVSS
_113
AB23
DVSS
_114
F28
DVSS
_115
M28
DVSS
_116
T28
DVSS
_117
AC28
IC100
BCM
3556
VDDC
_1
H8
VDDC
_2
J8
VDDC
_3
K8
VDDC
_4
L8
VDDC
_5
M8
VDDC
_6
N8
VDDC
_7
P8
VDDC
_8
R8
VDDC
_9
AA8
VDDC
_10
H9
VDDC
_11
H10
VDDC
_12
H11
VDDC
_13
H12
VDDC
_14
H13
VDDC
_15
H14
VDDC
_16
H15
VDDC
_17
H16
VDDC
_18
H17
VDDC
_19
H18
VDDC
_20
H19
VDDC
_21
H21
VDDC
_22
J21
VDDC
_23
K21
VDDC
_24
L21
VDDC
_25
M21
VDDC
_26
N21
VDDC
_27
P21
VDDC
_28
R21
VDDC
_29
T21
VDDC
_30
U21
VDDC
_31
V21
VDDC
_32
W21
VDDC
_33
Y21
AGC
_VDDO
AH27
VDDO
_1
AA12
VDDO
_2
AA13
VDDO
_3
AA18
VDDO
_4
AA19
VDDO
_5
E28
VDDO
_6
L28
VDDO
_7
U28
VDDO
_8
AB28
DDRV
_1
A9
DDRV
_2
G9
DDRV
_3
G11
DDRV
_4
G13
DDRV
_5
A14
DDRV
_6
G15
DDRV
_7
G17
DDRV
_8
A19
DDRV
_9
G19
Copyright LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
8/10/2019 Lg 42lh40ed[-Sa] 42lh45ed[-Sb] Chassis Lj92j
73/76
8/10/2019 Lg 42lh40ed[-Sa] 42lh45ed[-Sb] Chassis Lj92j
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THE
SYMBOLMARKOFTHISSCHEMETICDIAGRAMINCORPORATES
SPECIALFEATURESIMPORTANTFORPROTECTIONFR
OMX-RADIATION.
FILREAND
ELECTRICALSHOCKHAZARDS,WHEN
SERVICING
IFIS
ESSENTIALTHATONLYMANUFATURESSPECFIEDPAR
TSBEUSEDFOR
THECRITICALCOMPONENTSINTHE
SYMBOLMARK
OFTHESCHEMETIC.
MPEG_TS[6]
MPEG_TS[7]
MPEG
_TS[1]
MPEG
_TS[3]
MPEG
_TS[5]
MPEG
_TS[0-7]
MPEG_TS[4]
MPEG
_TS[2]
MPEG
_TS[0]
SAA
_ADDR[3]
SAA
_DATA[2]
SAA
_DATA[9]
SAA
_ADDR[8]
SAA
_ADDR[0-12]
SAA
_ADDR[12]
SAA_ADDR[0-12]SAA
_DATA[6]
SAA
_DATA[10]
SAA
_DATA[12]
SAA
_ADDR[2]
SAA
_ADDR[9]
SAA
_DATA[8]
SAA
_DATA[13]
SAA
_DATA[1]
SAA
_ADDR[10]
SAA
_DATA[7]
SAA
_DATA[0-15]
SAA
_ADDR[11]
SAA
_DATA[15]
SAA
_DATA[4]
SAA
_DATA[0]
SAA
_ADDR[7]
SAA
_DATA[3]
SAA
_ADDR[0]
SAA
_DATA[11]
SAA
_DATA[14]
SAA
_DATA[5]
SAA
_ADDR[5]
SAA
_ADDR[6]
SAA
_ADDR[4]
SAA
_ADDR[1]
SAA
_M
_BA1
16:AL5
CPLD
_TDO
H6
GND
R1318
33
SAA
_VREF
16:G16
D3.3V
SAA
_M
_LDM
16:AL4
R132010K
SAA
_M
_BA0
16:AL5
R1310
33
R1308 4.7K
SAA7163
_MISO
16:G13
C1306
0.1uF
D3.3V
D2.6
V
MPEG
_TS[0-7]
16
:AK17
SAA7163
_SCK
16:G13
SAA
_M
_UDQS
16:AL3
SAA
_M
_CSb
16:AL4
BCM_SPI_MOSI 10:B1;A7
GND
SAA7163
_MOSI
16:G13
R1314
4.7
KOPT
R13042.7K
GND
R13020
C1303
0.1uF
R130522MPEG_SDATA9:H7R130622
C1300
0.0
47uF
R1309
4.7
K
SAA
_M
_CLKE
16:AL6
SAA
_DATA[0-15]
16:E22
R1315
10K
MPEG_CLK 16:AK16
SF
_HOLDb
9:H6
R1312
4.7K
JP1301
R1311
33
JP1304
BCM
_SPI_MISO
9:H5;C6
D3.3V
SAA
_M
_WEb
16:AL4
BCM
_SPI_MISO
9:H5;A6
R130722
R1300
1K1%
BCM
_SPI_C
Sb
9:H5;A7
SAA7163
_CSb
16:G13
BCM
_SPI_SCK
10:B1;A7
CPLD
_TDI
H6
GND
SAA
_M
_UDM
16:AL5
CPLD
_TDO
I3
P1300
YFDW254-10S
ENG
9
4 8
3 7
2 6
1
10
5
SAA
_M
_CLKN
16:AL5
SAA
_M
_CLKP
16:AL5
R13211K
OPT
MPEG_SYNC9:H7
D3.3
V
BCM
_SPI_CSb
9:H5;C6
BCM
_SPI_SCK
10:B1;E7
C1305 0.1uFJP1302
C1307
0.1uF
R1301
1K1%
SAA
_ADDR[0-12]
16:E25
JP1303
BCM
_SPI_MOSI
10:B1;E7
SAA
_M
_CASb
16:AL4
SAA
_M
_RASb
16:AL4
R131610K
CPLD
_TDI
G3
MPEG
_SOP
16:AK15
C1302
0.1uF
GND
C1301
2.2uF
SAA
_M
_LDQS
16:AL3
C1304
0.1uF
C1308
100pF
CPLD
_TCK
H7
IC1300
HY5DU561622FTP-D43-C
26
BA0
27
BA1
28
A10/AP
29
A0
30
A1
31
A2
32
A3
33
VDD
_3
34
VSS
_1
35
A4
36
A5
37
A6
38
A7
39
A8
40
A9
41
A11
42
A12
43
NC
_5
44
CKE
45
CK
46
/CK
47
UDM
48
VSS
_2
49
VREF
50
NC
_6
17
NC
_2
3
VDDQ
_1
6
VSSQ
_1
16
LDQS
15
VDDQ
_3
14
NC
_1
13
DQ7
12
VSSQ
_2
11
DQ6
10
DQ5
9
VDDQ
_2
8
DQ4
7
DQ3
4
DQ1
5
DQ2
25
NC
_4
24
/CS
23
/RAS
2
DQ0
22
/CAS
21
/WE
1
VDD
_1
20
LDM
19
NC
_3
18
VDD
_2
51
UDQS
52
VSSQ
_3
53
NC
_7
54
DQ8
55
VDDQ
_4
56
DQ9
57
DQ10
58
VSSQ
_4
59
DQ11
60
DQ12
61
VDDQ
_5
62
DQ13
63
DQ14
64
VSSQ
_5
65
DQ15
66
VSS
_3
CPLD
_TMS
G3
GND
MPEG_SCLK9:H7
CPLD
_TCK
I3
JP1300
C1309
0.1uF
R131710K
CPLD
_TMS
H6
R1313 33
MPEG_VAL 16:AK17
SAA7163_54M_CLK16:G10
R13192.7K
R1303
33
D3.3
V
IC1302
EPM3032ATC44-10N
1
TDI
2
I/O
_1
3
I/O
_2
4
GNDIO
_1
5
I/O
_3
6
I/O
_4
7
TMS
8
I/O
_5
9
VCCIO
_1
10
I/O
_6
11
GNDIO
_2
12 I/O_7
13 I/O_8
14 I/O_9
15 I/O_10
16 GNDINT_1
17 VCCINT_1
18 I/O_11
19 I/O_12
20 I/O_13
21 I/O_14
22 I/O_15
23
I/O
_16
24
GNDIO
_3
25
I/O
_17
26
TCK
27
I/O
_18
28
I/O
_19
29
VCCIO
_2
30
GNDIO
_4
31
I/O
_20
32
TDO
33
I/O
_21
34I/O_2235I/O_2336GNDINT_2
37I/GCLK1
38I/OE1
39I/GCLRN
40I/OE2/GCLK2
41VCCINT_2
42I/O_24
43I/O_25
44I/O_26
C1310
0.1uF
IC1303
W25X20AVSNIG
3
WP
2
DO
4
GND
1
CS
5
DIO
6
CLK
7
HOLD
8
VCC
GND
D3.3
V
CPLD
ProgramI
/F
MPGE_VALID
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LGE Internal Use Only
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