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LCD TV
SERVICE MANUAL
CHASSIS : LP81A
MODEL : 47LG60FR 47LG60FR-TA/TG
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION ........................................................................................6
ADJUSTMENT INSTRUCTION ...............................................................13
TROUBLE SHOOTING ............................................................................17
BLOCK DIAGRAM...................................................................................22
EXPLODED VIEW .................................................................................. 23
SVC. SHEET ...............................................................................................
Copyright C 2008 LG Electronics. Inc. All right reserved. -2- LGE Internal Use Only
Only for training and service purposes
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC Do not use a line Isolation Transformer during this check.
power line. Use a transformer of adequate power rating as this Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
protects the technician from accidents resulting in personal injury between a known good earth ground (Water Pipe, Conduit, etc.)
from electrical shocks. and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
It will also protect the receiver and it's components from being with 1000 ohms/volt or more sensitivity.
damaged by accidental shorts of the circuitry that may be Reverse plug the AC cord into the AC outlet and repeat AC voltage
inadvertently introduced during the service operation. measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
If any fuse (or Fusible Resistor) in this TV receiver is blown, 0.5mA.
replace it with the specified. In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
When replacing a high wattage resistor (Oxide Metal Film Resistor, repaired before it is returned to the customer.
over 1W), keep the resistor 10mm away from PCB.
Leakage Current Hot Check circuit
Keep wires away from high voltage or high temperature parts.
AC Volt-meter
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 Good Earth Ground
shock. such as WATER PIPE,
To Instrument's CONDUIT etc.
0.15uF
Leakage Current Cold Check(Antenna Cold Check) exposed
METALLIC PARTS
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 1.5 Kohm/10W
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 1M and 5.2M.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Copyright C 2008 LG Electronics. Inc. All right reserved. -3- LGE Internal Use Only
Only for training and service purposes
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service unit under test.
manual and its supplements and addenda, read and follow the 2. After removing an electrical assembly equipped with ES
SAFETY PRECAUTIONS on page 3 of this publication. devices, place the assembly on a conductive surface such as
NOTE: If unforeseen circumstances create conflict between the aluminum foil, to prevent electrostatic charge buildup or
following servicing precautions and any of the safety precautions on exposure of the assembly.
page 3 of this publication, always follow the safety precautions. 3. Use only a grounded-tip soldering iron to solder or unsolder ES
Remember: Safety First. devices.
4. Use only an anti-static type solder removal device. Some solder
General Servicing Precautions removal devices not classified as "anti-static" can generate
1. Always unplug the receiver AC power cord from the AC power electrical charges sufficient to damage ES devices.
source before; 5. Do not use freon-propelled chemicals. These can generate
a. Removing or reinstalling any component, circuit board electrical charges sufficient to damage ES devices.
module or any other receiver assembly. 6. Do not remove a replacement ES device from its protective
b. Disconnecting or reconnecting any receiver electrical plug or package until immediately before you are ready to install it.
other electrical connection. (Most replacement ES devices are packaged with leads
c. Connecting a test substitute in parallel with an electrolytic electrically shorted together by conductive foam, aluminum foil
capacitor in the receiver. or comparable conductive material).
CAUTION: A wrong part substitution or incorrect polarity 7. Immediately before removing the protective material from the
installation of electrolytic capacitors may result in an leads of a replacement ES device, touch the protective material
explosion hazard. to the chassis or circuit assembly into which the device will be
installed.
2. Test high voltage only by measuring it with an appropriate high CAUTION: Be sure no power is applied to the chassis or circuit,
voltage meter or other voltage measuring device (DVM, and observe all other safety precautions.
FETVOM, etc) equipped with a suitable high voltage probe. 8. Minimize bodily motions when handling unpackaged
Do not test high voltage by "drawing an arc". replacement ES devices. (Otherwise harmless motion such as
3. Do not spray chemicals on or near this receiver or any of its the brushing together of your clothes fabric or the lifting of your
assemblies. foot from a carpeted floor can generate static electricity
4. Unless specified otherwise in this service manual, clean sufficient to damage an ES device.)
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable General Soldering Guidelines
non-abrasive applicator; 10% (by volume) Acetone and 90% (by 1. Use a grounded-tip, low-wattage soldering iron and appropriate
volume) isopropyl alcohol (90%-99% strength) tip size and shape that will maintain tip temperature within the
CAUTION: This is a flammable mixture. range or 500 F to 600 F.
Unless specified otherwise in this service manual, lubrication of 2. Use an appropriate gauge of RMA resin-core solder composed
contacts in not required. of 60 parts tin/40 parts lead.
5. Do not defeat any plug/socket B+ voltage interlocks with which 3. Keep the soldering iron tip clean and well tinned.
receivers covered by this service manual might be equipped. 4. Thoroughly clean the surfaces to be soldered. Use a mall wire-
6. Do not apply AC power to this instrument and/or any of its bristle (0.5 inch, or 1.25cm) brush with a metal handle.
electrical assemblies unless all solid-state device heat sinks are Do not use freon-propelled spray-on cleaners.
correctly installed. 5. Use the following unsoldering technique
7. Always connect the test receiver ground lead to the receiver a. Allow the soldering iron tip to reach normal temperature.
chassis ground before connecting the test receiver positive (500 F to 600 F)
lead. b. Heat the component lead until the solder melts.
Always remove the test receiver ground lead last. c. Quickly draw the melted solder with an anti-static, suction-
8. Use with this receiver only the test fixtures specified in this type solder removal device or with solder braid.
service manual. CAUTION: Work quickly to avoid overheating the
CAUTION: Do not connect the test fixture ground strap to any circuitboard printed foil.
heat sink in this receiver. 6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
Electrostatically Sensitive (ES) Devices (500 F to 600 F)
Some semiconductor (solid-state) devices can be damaged easily b. First, hold the soldering iron tip and solder the strand against
by static electricity. Such components commonly are called the component lead until the solder melts.
Electrostatically Sensitive (ES) Devices. Examples of typical ES c. Quickly move the soldering iron tip to the junction of the
devices are integrated circuits and some field-effect transistors and component lead and the printed circuit foil, and hold it there
semiconductor "chip" components. The following techniques only until the solder flows onto and around both the
should be used to help reduce the incidence of component component lead and the foil.
damage caused by static by static electricity. CAUTION: Work quickly to avoid overheating the circuit
1. Immediately before handling any semiconductor component or board printed foil.
semiconductor-equipped assembly, drain off any electrostatic d. Closely inspect the solder area and remove any excess or
charge on your body by touching a known earth ground. splashed solder with a small wire-bristle brush.
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
Copyright C 2008 LG Electronics. Inc. All right reserved. -4- LGE Internal Use Only
Only for training and service purposes
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through Circuit Board Foil Repair
which the IC leads are inserted and then bent flat against the Excessive heat applied to the copper foil of any printed circuit
circuit foil. When holes are the slotted type, the following technique board will weaken the adhesive that bonds the foil to the circuit
should be used to remove and replace the IC. When working with board causing the foil to separate from or "lift-off" the board. The
boards using the familiar round hole, use the standard technique following guidelines and procedures should be followed whenever
as outlined in paragraphs 5 and 6 above. this condition is encountered.
Removal At IC Connections
1. Desolder and straighten each IC lead in one operation by gently To repair a defective copper pattern at IC connections use the
prying up on the lead with the soldering iron tip as the solder following procedure to install a jumper wire on the copper pattern
melts. side of the circuit board. (Use this technique only on IC
2. Draw away the melted solder with an anti-static suction-type connections).
solder removal device (or with solder braid) before removing the
IC. 1. Carefully remove the damaged copper pattern with a sharp
Replacement knife. (Remove only as much copper as absolutely necessary).
1. Carefully insert the replacement IC in the circuit board. 2. carefully scratch away the solder resist and acrylic coating (if
2. Carefully bend each IC lead against the circuit foil pad and used) from the end of the remaining copper pattern.
solder it. 3. Bend a small "U" in one end of a small gauge jumper wire and
3. Clean the soldered areas with a small wire-bristle brush. carefully crimp it around the IC pin. Solder the IC connection.
(It is not necessary to reapply acrylic coating to the areas). 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
"Small-Signal" Discrete Transistor copper pattern. Solder the overlapped area and clip off any
Removal/Replacement excess jumper wire.
1. Remove the defective transistor by clipping its leads as close as
possible to the component body. At Other Connections
2. Bend into a "U" shape the end of each of three leads remaining Use the following technique to repair the defective copper pattern
on the circuit board. at connections other than IC Pins. This technique involves the
3. Bend into a "U" shape the replacement transistor leads. installation of a jumper wire on the component side of the circuit
4. Connect the replacement transistor leads to the corresponding board.
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder 1. Remove the defective copper pattern with a sharp knife.
each connection. Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
Power Output, Transistor Device 2. Trace along the copper pattern from both sides of the pattern
Removal/Replacement break and locate the nearest component that is directly
1. Heat and remove all solder from around the transistor leads. connected to the affected copper pattern.
2. Remove the heat sink mounting screw (if so equipped). 3. Connect insulated 20-gauge jumper wire from the lead of the
3. Carefully remove the transistor from the heat sink of the circuit nearest component on one side of the pattern break to the lead
board. of the nearest component on the other side.
4. Insert new transistor in the circuit board. Carefully crimp and solder the connections.
5. Solder each transistor lead, and clip off excess lead. CAUTION: Be sure the insulated jumper wire is dressed so the
6. Replace heat sink. it does not touch components or sharp edges.
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.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Copyright C 2008 LG Electronics. Inc. All right reserved. -5- LGE Internal Use Only
Only for training and service purposes
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application Range. 3. Test method
This spec sheet is applied to the 37"/42"/47"/52" LCD TV used
LP81A chassis. 3.1 Performance : LGE TV test method followed.
3.2 Demanded other specification
2. Specification Safety : UL, CSA, IEC specification
Each part is tested as below without special appointment 3.3 EMC : FCC, ICES, IEC specification
2.1 Temperature : 25±5°C(77±9°F), CST : 40±5°C
2.2 Relative Humidity : 65±10%
2.3 Power Voltage : Standard input voltage
(100~240V@ 50/60Hz)
· Standard Voltage of each products is marked by models
2.4 Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM .
2.5 The receiver must be operated for about 20 minutes prior
to the adjustment.
4. General Specification(TV)
No Item Specification Measurement Result Remark
1. Display Screen Device 37" wide Color Display Module Resolution:1366X768(HD)
42" wide Color Display Module Resolution:1366X768(HD)/1920*1080(FHD)
47" wide Color Display Module Resolution:1366X768(HD)/1920*1080(FHD)
52" wide Color Display Module Resolution:1920X1080(FHD)
2. Aspect Ratio 16:9
3. LCD Module 37" TFT WXGA LCD 37" HD MAKER :LPL
42" TFT WXGA LCD 42" HD MAKER :AUO, LPL
47" TFT WXGA LCD 47" HD MAKER :LPL
42" TFT WUXGA LCD 42" FHD MAKER : LPL
47" TFT WUXGA LCD 47" FHD MAKER : LPL
52" TFT WUXGA LCD 52" FHD MAKER : SHARP
4. Operating Environment 1) Temp. : 0 ~ 40 deg LGE SPEC
2) Humidity : 0 ~ 85%
5. Storage Environment 1) Temp. : -20 ~ 60 deg
2) Humidity : 0 ~ 85 %
6. Input Voltage AC100 ~ 240V, 50/60Hz
Copyright C 2008 LG Electronics. Inc. All right reserved. -6- LGE Internal Use Only
Only for training and service purposes
No Item Specification Measurement Result Remark
7. Power Consumption Power on (Blue) : LG30/LG50 Volume: 1/8 volume of
Power on (White) : LG60 sound distortion point
TBD 37" HD
250W 42" HD
230W FHD
320W 47" HD
310W FHD
350W 52" FHD
St-By (Red) LG60:St-by Light condition
1.0 W (All)
8 LCD Module Maker Inch (H)x(V)x(D) unit Remark
(Maker : AUO(HD) Outline Dimension 42" 983 x 576 x 52.7 mm [with inverter]
AUO, CMO, CPT, Pixel Pitch 0.681 x 0.681 mm
LPL, SHARP) Back Light 18 CCFL mm
CMO Outline Dimension 42" - mm
(FHD) Pixel Pitch - mm
Back Light - mm
LPL(HD) Outline Dimension 37" 877 x 516.8 x 55.5 mm [with inverter]
Pixel Pitch 0.200 x 0.600 mm
Back Light 16 EEFL mm
Outline Dimension 42" 983 x 576 x 51 mm [with inverter]
Pixel Pitch 0.227 x 0.681 mm
Back Light mm
Outline Dimension 47" 1096 x 640 x 51 mm [with inverter]
Pixel Pitch 0.76125 x 0.76125 mm
Back Light mm
LPL(FHD) Outline Dimension 42" 983 x 576 x 47.3/(51) mm [w/o inverter]/(with inverter)
Pixel Pitch 0.4845 x 0.4845 mm
Back Light mm
Outline Dimension 47" 1096 x 640 x 50/(51) mm [w/o inverter]/(with inverter)
Pixel Pitch 0.5415 x 0.5415 mm
Back Light mm
SHARP Outline Dimension 52" 1219.0x706.7x64.64 mm (W) x (H) x (D)
(FHD) Pixel Pitch 0.600 x 0.600 mm (H) x (V)
Back Light 24CCFL
Display Colors - -
Coating 3H,AG/ 2H, AG LPL,CMO,AUO / Sharp
Copyright C 2008 LG Electronics. Inc. All right reserved. -7- LGE Internal Use Only
Only for training and service purposes
5. Chrominance & Luminance Specification
No Item Min Typ Max Unit Maker Remark
1 Luminance 400 500 cd/m2 AUO 42" HD -50cm from the surface
(W/O PC mode) 400 500 LPL 37" HD - Full White Pattern
400 500 LPL 42" HD
400 450 LPL 47" HD
400 500 LPL 42" FHD
400 500 LPL 47" FHD
360 450 SHARP 52" FHD
2 Color Coordinate White X Typ. 0.280 Typ. AUO 42" 42LG30R-TA
Y -0.03 0.290 +0.03 (HD)
Red X 0.640 T420XW01-VB
Y 0.330
Green X 0.290
Y 0.600
Blue X 0.150
Y 0.060
White X Typ. 0.279 Typ. LPL 37" (HD) 37LG30R/37LG60UR
Y -0.03 0.292 +0.03 LC370WXN-SAA1
Red X 0.636
Y 0.335
Green X 0.284
Y 0.610
Blue X 0.144
Y 0.063
White X Typ. 0.279 Typ. LPL 42" 42LG30RA-TA
Y -0.03 0.292 +0.03 (HD)
Red X 0.635
Y 0.344
Green X 0.286
Y 0.614
Blue X 0.146
Y 0.061
White X Typ. 0.270. Typ. LPL47"
Y -0.03 0.292 +0.03 (HD)
Red X 0.638
Y 0.342
Green X 0.296
Y 0.615
Blue X 0.144
Y 0.064
Copyright C 2008 LG Electronics. Inc. All right reserved. -8- LGE Internal Use Only
Only for training and service purposes
No Item Min Typ Max Unit Maker Remark
White X Typ. 0.279 Typ. LPL 42" (FHD) 42LG60FR-TA
Y -0.03 0.292 +0.03 LC420WUE-SAB1 42LG50FR-TA
Red X 0.640 LC420WUN-SAB1
Y 0.335
Green X 0.289
Y 0.610
Blue X 0.144
Y 0.066
White X Typ. 0.279 Typ. LPL 47" (FHD) 47LG60FR-MA
Y -0.03 0.292 +0.03 LC470WUE-SAB1 47LG50FR-TA
Red X 0.640 LC470WUN-SAB1
Y 0.335
Green X 0.289
Y 0.610
Blue X 0.144
Y 0.066
White X Typ. 0.272 Typ. SHARP 52" 52LG50FR-TA
Y -0.03 0.277 +0.03 (FHD)
Red X 0.640 LK520D3LZ17
Y 0.330
Green X 0.280
Y 0.600
Blue X 0.150
Y 0.060
3 Contrast ratio 1000:1 1500:1 AUO 42" (HD)
(W/O PC mode) 840:1/800:1 1200:1 LPL 32"/37" (HD)
800:1 1200:1 LPL 42" (HD)
700:1 1200:1 LPL 47" (HD)
TBD 1500:1 LPL 42"/47" (FHD)
1000:1 1500:1 SHARP 52" (FHD)
4 Luminance Variation 1.3 (1.25) All w/o Sharp 52" (Sharp 52")
Copyright C 2008 LG Electronics. Inc. All right reserved. -9- LGE Internal Use Only
Only for training and service purposes
6. SET Optical Feature
6.1. General feature
- Measurement Condition: Full white/ Vivid => Measure the black luminance after 30 seconds.
- C/R is excepted for PC mode
Value
No Parameter Symbol Unit Remark
Min Typ
1 37 inch(HD) Contrast Ratio Dynamic CR 9000:1 12000:1
LPL Surface Luminance, LWH (AV/Component/HDMI) 360 450 Cd/m2
white LWH (PC) 250 Cd/m2
2 42 inch(HD) Contrast Ratio Dynamic CR 9000:1 12000:1
AUO Surface Luminance, LWH (AV/Component/HDMI) 360 450 Cd/m2
white LWH(PC) 250 Cd/m2
3 42 inch(HD) Contrast Ratio Dynamic CR 9000:1 12000:1
LPL Surface Luminance, LWH (AV/Component/HDMI) 360 450 Cd/m2
white LWH(PC) 250 Cd/m2
4 47 inch(HD) Contrast Ratio Dynamic CR 9000:1 12000:1
LPL Surface Luminance, LWH(AV/Component/HDMI) 360 450 Cd/m2
white LWH(PC) 250 Cd/m2
5 42 inch(FHD) Contrast Ratio Dynamic CR 9000:1 12000:1
LPL TBD 15000 : 1 For 50/60/70 Tool
Surface Luminance, LWH(AV/Component/HDMI) 360 450 Cd/m2
white LWH(PC) 250 Cd/m2
6 47 inch(FHD) Contrast Ratio Dynamic CR 9000:1 12000:1
LPL TBD 15000 : 1 For 50/60/70 Tool
Surface Luminance, LWH(AV/Component/HDMI) 360 450 Cd/m2
white LWH(PC) 250 Cd/m2
7 52 inch(FHD) Contrast Ratio Dynamic CR 9000:1 12000:1
Sharp TBD 15000 : 1 For 50/60/70 Tool
Surface Luminance, LWH(AV/Component/HDMI) 320 400 Cd/m2
white LWH(PC) 250 Cd/m2
Copyright C 2008 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only
Only for training and service purposes
7. Component Video Input (Y, PB, PR)
Specification
No. Remark
Resolution H-freq(kHz) V-freq(Hz) Pixek clock
1. 720*480 15.73 59.94 13.500 SDTV, DVD 480I(525I)
2. 720*480 15.75 60.00 13.514 SDTV, DVD 480I(525I)
3. 720*576 15.625 50.00 13.500 SDTV, DVD 576I(625I) 50Hz
4. 720*480 31.47 59.94 27.000 SDTV 480P
5. 720*480 31.50 60.00 27.027 SDTV 480P
6. 720*576 31.25 50.00 27.000 SDTV 576P 50Hz
7. 1280*720 44.96 59.94 74.176 HDTV 720P
8. 1280*720 45.00 60.00 74.250 HDTV 720P
9. 1280*720 37.50 50.00 74.25 HDTV 720P 50Hz
10. 1920*1080 28.125 50.00 74.250 HDTV 1080I 50Hz,
11. 1920*1080 33.72 59.94 74.176 HDTV 1080I
12. 1920*1080 33.75 60.00 74.25 HDTV 1080I
13. 1920*1080 56.25 50 148.5 HDTV 1080P
14 1920*1080 67.432 59.94 148.350 HDTV 1080P
15 1920*1080 67.5 60.00 148.5 HDTV 1080P
8. RGB Input (Analog PC)
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed Remark
1. 640*350 31.468 70.80 25.17 EGA
2 720*400 31.469 70.08 28.32 DOS
3. 640*480 31.469 59.94 25.17 VESA(VGA)
4 800*600 37.879 60.31 40 VESA(SVGA)
5 1024*768 48.363 60 65 VESA(XGA)
6 1280*768 47.776 59.87 79.5 VESA(WXGA)
7 1360*768 47.72 59.799 84.75 VESA(WXGA)
8 1366*768 47.7 60 84.62 VESA(WXGA)
9 1280*1024 63.668 59.895 109.00 SXGA Only FHD
10 1400*1050 65.317 59.978 121.75 SXGA Only FHD
11 1600*1200 74.537 59.869 161.00 UXGA Only FHD
12 1920*1080 66.587 59.934 138.50 WUXGA (Reduced Blanking) Only FHD
Copyright C 2008 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only
Only for training and service purposes
9. HDMI Input (PC-Spec. out but display correctly at only HDMI/DVI IN 1 via DVI to HDMI cable)
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed Remark
1. 720x400 31.468 70.08 28.32
2. 640x480 31.469 59.94 25.17 VESA(VGA)
3. 800x600 37.879 60.31 40.00 VESA(SVGA)
4 1024x768 48.363 60.00 65.00 VESA(XGA)
5 1280x768 47.776 59.87 79.5 VESA(WXGA)
6 1360x768 47.72 59.799 84.62 VESA(WXGA)
7 1366x768 47.7 60 84.62 VESA(WXGA)
8 1280x1024 63.595 60.0 108.875 SXGA Only FHD
9 1400x1050 65.160 60.0 122.50 SXGA Only FHD
10 1600x1200 74.077 60.0 130.375 UXGA Only FHD
11 1920x1080 66.647 59.988 138.625 WUXGA Only FHD
10. HDMI input ( DTV )
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed Remark
1 720*480 31.47 59.94 27 SDTV 480P Support(not spec)
2 720*480 31.5 60 27.027 SDTV 480P support(not spec)
3 720*576 31.25 50 27 SDTV 576P support(not spec)
4 1280*720 44.96 59.94 74.176 HDTV 720P
5 1280*720 45 60 74.25 HDTV 720P
6 1280*720 37.5 50 74.25 HDTV 720P
7 1920*1080 28.125 50 74.25 HDTV 1080I
8 1920*1080 33.72 59.94 74.176 HDTV 1080I
9 1920*1080 33.75 60 74.25 HDTV 1080I
10 1920*1080 56.25 50 148.5 HDTV 1080P
11 1920*1080 67.432 59.94 148.350 HDTV 1080P
12 1920*1080 67.5 60.00 148.5 HDTV 1080P
13 1920*1080 27 24 74.25 HDTV 1080P
14 1920*1080 33.75 30 74.25 HDTV 1080P
Copyright C 2008 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only
Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application Range 4. PCB assembly adjustment method
These instructions are applied to all of the LCD TV, LP81A (Using MSTAR Download program)
Chassis.
4.1 S/W program download
4.1.1 Preliminary steps
2. Notice (1) Download method 1 (PCB Assy)
2.1 Because this is not a hot chassis, it is not necessary to - HD
use an isolation transformer. However, the use of
isolation transformer will help protect test instrument.
2.2 Adjustment must be done in the correct order.
2.3 The adjustment must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
2.4 The input voltage of the receiver must keep 100~220V,
50/60Hz.
2.5 Before adjustment, execute Heat-Run for 15 minutes at
RF no signal.
- FHD
3. Adjustment items
3.1 PCB assembly adjustment items
Download the MSTAR main software (IC801, Mstar ISP
Utility)
3.2 SET assembly adjustment items
DDC Data input.
Adjustment of White Balance.
Factoring Option Data input
(2) Connect the download jig to D-sub jack
Copyright C 2008 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only
Only for training and service purposes
4.1.2 Download steps (5).Click "Auto(2)" tab and set as below
(1) Execute `ISP Tool' program in PC, then a main window (6).click "Run(3)".
will be opened (7).After downloading, check "OK(4)" message.
Double click
(2) Click the connect button and confirm "Dialog Box".
# USB DOWNLOAD
1. Put the USB Stick to the USB socket
(3) Click the Config button and Change speed
E2PROM Device setting : over the 350Khz
(4) Read and write bin file
Click "(1)Read" tab, and then load download
2. Automatically detecting update file in USB Stick
file(XXXX.bin) by clicking "Read".
Copyright C 2008 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only
Only for training and service purposes
3. Select "Start" Button and press "ok" button 4.2.1.1 Confirmation
Updating is staring. - We confirm whether "0xF3 (offset), 0xF4 (gain)" address of
EEPROM "0xBC" is "0xAA" or not.
- If "0xF3", "0xF4" address of EEPROM "0xBC" isn't "0xAA",
we adjust once more
- We can confirm the ADC values from "0x06~0x0B"
addresses in a page "0xBC"
*Manual ADC process using Service Remocon. After enter
Service Mode by pushing "ADJ" key, execute "Auto-RGB"
by pushing "_" key at "Auto-RGB".
4.2.2 Component input ADC
4.2.2.1 Component Gain/Offset Adjustment7
- Convert to Component in Input-source
- Input the Component ( Which has 720p@60Hz YPbPr
signal : 100% Color Bar (MSPG-925F Model : 217 / Pattern:
65 ) into Component.
- Adjust by commanding AUTO_COLOR_ADJUST (0xF1)
0x00 0x02 instruction
4. Finishing the version updating, you have to put out USB stick
and "AC Power" off 4.2.2.2 Confirmation
5. After putting "AC Power" on and check updated version on - We confirm whether "0xF3 (offset), 0xF4 (gain)" address of
your TV EEPROM "0xBC" is "0xAA" or not.
- If "0xF3", "0xF4" address of EEPROM "0xBC" isn't "0xAA",
4.2 ADC Process we adjust once more
O Required Equipments - We can confirm the ADC values from "0x06~0x0B"
- Remote controller for adjustment addresses in a page "0xBC"
- MSPG-925F Pattern Generator *Manual ADC process using Service Remocon. After enter
Service Mode by pushing "ADJ" key, execute "Auto-RGB"
4.2.1 Method of Auto RGB Color Balance by pushing "_" key at "Auto-RGB".
- Convert to RGB PC in Input-source
- Input the PC 1024x768 @ 60Hz 1/2 Black & White
Pattern(MSPG-925F model:60, pattern:54) into RGB
- Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction.
Copyright C 2008 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only
Only for training and service purposes
5. Adjusting the White Balance 6. Adjustment of White Balance
5.1 Purpose and Principle for adjustment of the · Adjustment mode : Two modes (Cool and Warm)
color temperature (Medium data is automatically calibrated by the Cool data)
- Purpose : Adjust the color temperature to reduce the · Color analyzer(CA100+, CA210) should be used in the
deviation of the module color temperature. calibrated ch by CS-1000
- Principle : To adjust the white balance without the (LCD : CH9, PDP : CH10)
saturation, · Operate the zero-calibration of the CA100+ or CA-210, then
(Fix the one of R/G/B gain to C0 and decrease the others.) stick sensor to the module when adjusting.
· For manual adjustment, it is also possible by the following
5.2 Adjustment mode : Two modes of Cool and Warm sequence.
(Medium data is automatically calibrated by the
1) Select white pattern of heat-run by pressing "POWER ON"
Cool data) key on remote control for adjustment then operate heat run
longer than 15 minutes.
O Required Equipments (If not executed this step, the condition for W/B may be
- Remote controller for adjustment different.)
- Color Analyzer : CA100+ or CA-210 or same product 2) Push "Exit" key.
LCD TV( ch : 9 ), 3) Change to the AV mode by remote control.(Push front-AV
- Auto W/B adjustment instrument(only for Auto adjustment) or Input key)
4) Input external pattern(85% white pattern)
5.3 Connecting diagram of equipment for 5) Push the ADJ key two times (entering White Balance
measuring (For Automatic Adjustment) mode)
6) Stick the sensor to the center of the screen and select
each items (Red/Green/Blue Gain and Offset) using /
(CH +/-) key on R/C..
7) Adjust R/ G/ B Gain using / (VOL+/-) key on R/C.
8) Adjust two modes (Cool and Warm)
(Fix the one of R/G/B and change the others)
9) When adjustment is completed, Exit adjustment mode
using EXIT key on R/C.
(1) Enter the adjustment mode of DDC
- Set command delay time : 50ms
- Enter the DDC adjustment mode at the same time heat-
- Maintain the DDC adjustment mode with same condition
of Heat-run
-> Maintain after AC off/on in status of Heat-run pattern
display)
(2) Release the DDC adjustment mode
- Release the adjust mode after AC off/on or std-by off/on
in status of finishing the Hear-run mode
- Release the Adjust mode when receiving the aging off
command(F3 00 00) from adjustment equipment
- Need to transmit the aging off command to TV set after
finishing the adjustment.
- Check DDC adjust mode release by exit key and
release DDC adjust mode
(3) Enter the adjust mode of white balance
- Enter the white balance adjustment mode with aging
command(F3, 00, FF)
* Luminance min value is 200cd/ß in the cool mode( For
LCD)
Copyright C 2008 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only
Only for training and service purposes
TROUBLE SHOOTING
1. No power
1) Symptom
1) It is not discharged minutely from the module.
2) Light doesnot come into the front LED.
2) Check process
Is plug in No
Power cord inserted? Plug in power cord
Yes
Is the Line Filter No
and PSU connected? Connect a cable to SC100
Yes
Is the fuse of No
PSU normal? Replace the fuse.
F101
Yes
Is it connected that No
PSU and P1100 in Connect a cable P1100
Main Board
Yes
After all cables connect is
removed to PSU.
The AC voltage marking is
authorized on manual.
When ST-By 5V is not operated.
replace PSU.
Copyright C 2008 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only
Only for training and service purposes
2. No Raster
1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green
.
2) Check process
Does mimute No No Is output the normality No
Is the inverter Replace the
discharge a Module? Low/High voltage
/VaVs on? Power board
except Stand-by 5V?
Yes
Check the LCD Module
Yes
No Reconnect the
Is the Link cable
Panel line cable
normal?
(HD:P403, FHD:402)
CN700(PDP/LCD)
Yes
Is the IC801's No
Replace the VSC.
output normal?
Copyright C 2008 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only
Only for training and service purposes
3. Unusual display from RF mode.
1) Check process
Is Video output of the Is the
No Yes Is the I2C communication normal?
Tuner normal? Input voltage normal?
(Check Pin3) (Check Pin9, Pin10)
(Check TU500_Pin13)
No No
Yes Check the power Check the Tuner
Block A
Is the LVDS No
cable connected well? Cable inserts well
Yes
Change the IC(IC801)
Copyright C 2008 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only
Only for training and service purposes
4. Unusual display from rear AV mode
.
Is video input of the No
A/V Jack normal? Check the input source.
(Check R8044)
Yes
Same as Block A
5. Unusual display from Side AV mode.
Is video input of the No
Side A/V Jack normal? Check the input source.
(Check R8043)
Yes
Same as Block A
6. Unusual display from Side S-Video mode.
Is video input of the
No
S-Video Jack normal? Check the input source.
(Check R8041,8042)
Yes
Same as Block A
7. Unusual display from componen 1 mode.
t
Is Video input of the
No
Comp1 jack normal? Check the input source.
(Check R8011,8012,8013)
Yes
Change IC801
8. Unusual display from component 2 mode.
Is Video input of the
Comp2 jack normal? No
Check the input source.
(Check R8030,8032,8033)
Yes
Change IC801
9. Unusual display from RGB mode.
Is Video input of the
No
Comp2 jack normal? Check the input source.
(Check R8035,8037,8039)
Yes
Change IC801
Copyright C 2008 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only
Only for training and service purposes
10. No Sound
10-1 Symptom
1) LED is green.
2) Screen display but sound is not output.
10-2 Check process
All input(mode) No Is the speaker No Set on speaker
is no sound. on it men? in menu
Menu?
Yes Yes
Only HDMI is No Is the speaker No Check the
Download the EDID data.
no sound cable normal? Speaker cable
Yes
Only AV/ Replace Yes
No Is the output of No
COM2/PC input is IC600
IC600 normal?
no sound.
Yes
Yes Check the signal after IC801 operate No Replace
IC600 refer to circuit normal? IC801
diagram Normal
Yes
No Check the Tuner In/Out.
Only External speaker
is no sound No Replace
IC 601 operate
normal? IC601
Normal
Yes
Replace Main B/D
Copyright C 2008 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only
Only for training and service purposes
TUNER_I2C
RF CVBS IN
(Tuner) LINE DDR MEM
IN SIF IN MAIN NVM
CV