LG 37LG30R User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LP81A
MODEL : 37LG30R(A) 37LG30R(A)-TA
website:http://biz.LGservice.com
Internal Use Only
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CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION........................................................................................6
ADJUSTMENT INSTRUCTION ...............................................................13
TROUBLE SHOOTING............................................................................17
BLOCK DIAGRAM...................................................................................22
EXPLODED VIEW .................................................................................. 23
SVC. SHEET ...............................................................................................
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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 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
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 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 exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩand 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
1.5 Kohm/10W
To Instrument’s
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF
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CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create 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 Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug or
other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Test high voltage only by measuring it with an appropriate high
voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specified otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10% (by volume) Acetone and 90% (by
volume) isopropyl alcohol (90%-99% strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual, lubrication of
contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks are
correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test fixtures specified in this
service manual.
CAUTION: Do not connect the test fixture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily
by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques
should be used to help reduce the incidence of component
damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist strap device, which should be removed to
prevent potential shock reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES
devices.
4. Use only an anti-static type solder removal device. Some solder
removal devices not classified as "anti-static" can generate
electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum foil
or comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be
installed.
CAUTION: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Otherwise harmless motion such as
the brushing together of your clothes fabric or the lifting of your
foot from a carpeted floor can generate static electricity
sufficient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropriate
tip size and shape that will maintain tip temperature within the
range or 500°F to 600°F.
2. Use an appropriate gauge of RMA resin-core solder composed
of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall 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 technique
a. Allow the soldering iron tip to reach normal temperature.
(500°F to 600°F)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suction-
type solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the
circuitboard printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
(500°F to 600°F)
b. First, hold the soldering iron tip and solder the strand against
the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder flows onto and around both the
component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.
SERVICING PRECAUTIONS
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IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently
prying up on the lead with the soldering iron tip as the solder
melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing the
IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close as
possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining
on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as
possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and if
necessary, apply additional solder.
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.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever
this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC
connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the good
copper pattern. Solder the overlapped area and clip off any
excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly
connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.
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SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
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
1. Application Range.
This spec sheet is applied to the 37"/42"/47"/52" LCD TV used
LP81A chassis.
2. Specification
Each part is tested as below without special appointment
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.
3. Test method
3.1 Performance : LGE TV test method followed.
3.2 Demanded other specification
Safety : UL, CSA, IEC specification
3.3 EMC : FCC, ICES, IEC specification
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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
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5. Chrominance & Luminance Specification
No Item Min Typ Max Unit Maker Remark
1 Luminance 400 500 cd/m2AUO 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
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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")
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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
No Parameter Symbol Value 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
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7. Component Video Input (Y, PB, PR)
No. Specification 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
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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
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ADJUSTMENT INSTRUCTION
1. Application Range
These instructions are applied to all of the LCD TV, LP81A
Chassis.
2. Notice
2.1 Because this is not a hot chassis, it is not necessary to
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.
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
4. PCB assembly adjustment method
(Using MSTAR Download program)
4.1 S/W program download
4.1.1 Preliminary steps
(1) Download method 1 (PCB Assy)
- HD
- FHD
(2) Connect the download jig to D-sub jack
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4.1.2 Download steps
(1) Execute ‘ISP Tool’ program in PC, then a main window
will be opened
(2) Click the connect button and confirm "Dialog Box".
(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
file(XXXX.bin) by clicking "Read".
(5).Click "Auto(2)" tab and set as below
(6).click "Run(3)".
(7).After downloading, check "OK(4)" message.
# USB DOWNLOAD
1. Put the USB Stick to the USB socket
2. Automatically detecting update file in USB Stick
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Double click
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3. Select "Start" Button and press "ok" button
Updating is staring.
4. Finishing the version updating, you have to put out USB stick
and "AC Power" off
5. After putting "AC Power" on and check updated version on
your TV
4.2 ADC Process
O Required Equipments
- Remote controller for adjustment
- MSPG-925F Pattern Generator
4.2.1 Method of Auto RGB Color Balance
- 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.
4.2.1.1 Confirmation
- 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
4.2.2.2 Confirmation
- 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".
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5. Adjusting the White Balance
5.1 Purpose and Principle for adjustment of the
color temperature
- Purpose : Adjust the color temperature to reduce the
deviation of the module color temperature.
-Principle : To adjust the white balance without the
saturation,
(Fix the one of R/G/B gain to C0 and decrease the others.)
5.2 Adjustment mode : Two modes of Cool and Warm
(Medium data is automatically calibrated by the
Cool data)
O Required Equipments
- Remote controller for adjustment
- Color Analyzer : CA100+ or CA-210 or same product
LCD TV( ch : 9 ),
- Auto W/B adjustment instrument(only for Auto adjustment)
5.3 Connecting diagram of equipment for
measuring (For Automatic Adjustment)
(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)
6. Adjustment of White Balance
• Adjustment mode : Two modes (Cool and Warm)
(Medium data is automatically calibrated by the Cool data)
• Color analyzer(CA100+, CA210) should be used in the
calibrated ch by CS-1000
(LCD : CH9, PDP : CH10)
• Operate the zero-calibration of the CA100+ or CA-210, then
stick sensor to the module when adjusting.
• For manual adjustment, it is also possible by the following
sequence.
1) Select white pattern of heat-run by pressing "POWER ON"
key on remote control for adjustment then operate heat run
longer than 15 minutes.
(If not executed this step, the condition for W/B may be
different.)
2) Push "Exit" key.
3) Change to the AV mode by remote control.(Push front-AV
or Input key)
4) Input external pattern(85% white pattern)
5) Push the ADJ key two times (entering White Balance
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.
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TROUBLE SHOOTING
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1)Symptom
1) It is not discharged minutelyfrom the module.
2) Light doesnotcome intothe frontLED.
2) Check process
1.Nopower
No
Yes
Is plug in
Power cord inserted?
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.
Plug in power cord
No
Yes
Is the Line Filter
and PSU connected? Connect a cable to SC100
No
Yes
Is the fuse of
PSU normal?
F101 Replace the fuse.
No
Yes
Is it connected that
PSU and P1100 in
Main Board Connect a cable P1100
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1)Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green.
2) Check process
2. No Raster
No
No
No
No No
Yes
Yes
Yes CN700(PDP/LCD)
Replace the VSC.
Does mimute
discharge a Module?
Is the Link cable
normal?
Is the IC801’s
output normal?
Check the LCD Module
Reconnect the
Panel line cable
(HD:P403, FHD:402)
Is the inverter
/VaVs on?
Is output the normality
Low/High voltage
except Stand-by 5V?
Replace the
Power board
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Copyright LG Electronics. Inc. All right reserved.
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C2008
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1) Check process
3. Unusual display from RF mode.
No Yes
Yes
No No
Is Video output of the
Tuner normal?
(Check TU500_Pin13)
Is the
Input voltage normal?
(Check Pin3)
Block A
Is the I2C communication normal?
(Check Pin9, Pin10)
No
Yes
Is the LVDS
cable connected well?
Change the IC(IC801)
Check the power
Cable inserts well
Check the Tuner
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Copyright LG Electronics. Inc. All right reserved.
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C2008
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4. Unusual display from rear AV mode.
5. Unusual display from Side AV mode.
6. Unusual display from Side S-Video mode.
7. Unusual display from component 1 mode.
8. Unusual display from component 2 mode.
9. Unusual display from RGB mode.
No
Yes
Is video input of the
A/V Jack normal?
(Check R8044)
Same as Block A
Same as Block A
Same as Block A
Check the input source.
Check the input source.
Check the input source.
Check the input source.
Change IC801
Change IC801
Change IC801
Is Video input of the
Comp1 jack normal?
(Check R8011,8012,8013)
Is Video input of the
Comp2 jack normal?
(Check R8030,8032,8033)
Is Video input of the
Comp2 jack normal?
(Check R8035,8037,8039)
Check the input source.
Check the input source.
Is video input of the
Side A/V Jack normal?
(Check R8043)
Is video input of the
S-Video Jack normal?
(Check R8041,8042)
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
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