LG 42LG6000 User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LD89F
MODEL : 42LG6000 42LG6000-ZA
42LG6100 42LG6100-ZB
website:http://biz.LGservice.com
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CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION ........................................................................................6
ADJUSTMENT INSTRUCTION ...............................................................13
TROUBLE SHOOTING ............................................................................15
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 .
1. General Specification(TV)
No. Item Specification Remark
1. Video input applicable system PAL-D/K, B/G, I, SECAM
2. Receivable Broadcasting System 1) PAL/SECAM B/G EU(PAL Market)
2) PAL/SECAM D/K
3) PAL I/II
4) SECAM L/L’
5) DVB-T
3. RF Input Channel VHF : E2 ~ E12 PAL
UHF : E21 ~ E69
CATV : S1 ~ S20
HYPER : S21~ S47
4. Input Voltage AC 100 ~ 240 V/50Hz, 60Hz
5. Picture Size 37 inch 37LG6000/42LG6000/47LG6000
42 inch
47 inch
6. Tuning System FVS 100 program PAL, 200 PR.(Option)
7. Operating Environment 1) Temp : 0 ~ 40 deg LGE SPEC
2) Humidity : 10 ~ 90 %
8. Storage Environment 3) Temp : -20 ~ 50 deg LGE SPEC
4) Humidity : 10 ~ 90 %
9. Display LCD Module LPL
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2. General Specification(LCD Module)
No Item Specification Unit Remark
1. Panel 37" TFT WUXGA LCD 37LG6000
42" TFT WUXGA LCD 42LG6000
47" TFT WUXGA LCD 47LG6000
2. Frequency range H : 64.1 ~ 67.5Khz, V : 57 ~ 63Hz 37 inch
H : 121.8 ~ 136.4Khz, V : 108.2 ~ 121.2Hz 42 inch
H : 121.8 ~ 136.4Khz, V : 108.2 ~ 121.2Hz 47 inch
3. Power consumption 37 inch ≤10.76 + 132 W LCD + Backlight
42 inch 9.4(Max) + 160.8(Typ) W
47 inch ≤TBD + 240(Max) W
4. LCD Module-LPL Type Size 37" 877 x 516.8 x 55.5 mm (H)x (V)x(D)
42" 983.0 x 576.0 x 47.3
47" 1096.0 x 640.0 x 50
Pixel Pitch 37" 0.42675 x 0.42675 mm
42" 0.4845 x 0.4845
47" 0.5415 x 0.5415
Pixel Format 1920 horiz. By 1080 vert. 37/42/47 inch
Pixels RGB stripe arrangement
Coating Hard coating(3H), Anti-glare treatment
of the front polarizer(Haze 13%)
Back Light 37" 16 Lamp(EEFL)
42" 18 Lamp(EEFL)
47" 22 Lamp(CCFL)
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3. Optical Feature(LCD Module)
No. Item Specification Min. Typ. Max. Remark
1. Viewing Angle(CR>10) R/L, U/D 178, 178
2. Luminance Luminance (cd/m2) 400 500
42" without PC (PC: min 300)
Variation - 1.3 MAX / MIN
3. Contrast Ratio CR(37") 1000 1400 All white/All black
CR(42") 1000 1400 without PC (PC:min400)
CR(47") TBD 1500
4. CIE Color Coordinates White WX Typ 0.279 Typ 37 inch
WY -0.03 0.292 +0.03
RED Xr 0.641
Yr 0.334
Green Xg 0.291
Yg 0.614
Blue Xb 0.145
Yb 0.062
White WX Typ 0.279 Typ 42 inch
WY -0.03 0.292 +0.03
RED Xr 0.640
Yr 0.335
Green Xg 0.289
Yg 0.610
Blue Xb 0.144
Yb 0.066
White WX Typ 0.279 Typ 47 inch
WY -0.03 0.292 +0.03
RED Xr 0.636
Yr 0.334
Green Xg 0.291
Yg 0.613
Blue Xb 0.146
Yb 0.061
1) Standard Test Condition
2) Surrounding Brightness Level : dark
3) Surrounding Temperature : 25±2°C
4) warm-up Time : 30 Min
5) Input Signal : VESA XGA 60Hz
- Contrast, Brightness : Max.
- Clock/Clock Phase : accurate adjustment
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4. Optical Feature(SET)
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No. Item Specification Min. Typ. Max. Remark
1. Luminance Luminance (cd/m2) 400 450 HDMI
350 400 RF, AV, RGB
Variation - 1.3 MAX / MIN
2Contrast Ratio CR(37") 900 1400 All white/All black
CR(42") 900 1400 without PC (PC:min400)
CR(47") 900 1300
5. Component Video Input (Y, PB, PR)
No. Specification Remark
Resolution H-freq(kHz) V-freq(Hz)
1. 720x480 15.73 60.00 SDTV, DVD 480i
2. 720x480 15.63 59.94 SDTV, DVD 480i
3. 720x480 31.47 59.94 SDTV, 480p
4. 720x480 31.50 60.00 SDTV, 480p
5. 720x576 15.625 50.00 SDTV, DVD 625 Line
6. 720x576 31.25 50.00 HDTV 576p
7. 1280x720 45.00 60.00 HDTV 720p
8. 1280x720 44.96 59.94 HDTV 720p
9. 1280x720 37.50 50 HDTV 720p 50Hz
10. 1920x1080 31.25 50.00 HDTV 1080i
11. 1920x1080 33.75 60.00 HDTV 1080i
12. 1920x1080 33.72 59.94 HDTV 1080i
13. 1920x1080 56.25 50.00 HDTV 1080P
14. 1920x1080 67.433 59.94 HDTV 1080P
15. 1920x1080 67.50 60 HDTV 1080P
6. RGB Input (PC)
No.Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed
1. 720x400 31.468 70.08 28.32
2. 640x480 31.469 59.94 25.17 VESA
3. 800x600 37.879 60.31 40.00 VESA
4. 1024x768 48.363 60.00 65.00 VESA(XGA)
5. 1280x768 47.78 59.87 79.5 VESA(WXGA)
6. 1360x768 47.72 59.8 84.625 VESA(WXGA)
7. 1920x1080 66.647 59.988 138.625 WUXGA
8. 1280x1024 63.981 60.02 108 SXGA(Only FHD)
9. 1400x1050 65.317 59.978 121.75 SXGA(Only FHD)
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7. HDMI DTV
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed Remark
1. 640x480 31.469 59.94 25.175 SDTV 480p 60Hz
2. 640x480 31.469 60 25.20 SDTV 480p 60Hz
3. 720x480 31.47 59.94 27.00 SDTV 480p 60Hz
4. 720x480 31.50 60 27.027 SDTV 480p 60Hz
5. 720x576 31.25 50.00 27.000 SDTV 576p 50Hz
6. 1280x720 37.50 50.00 74.176 HDTV 720p 50Hz HDCP
7. 1280x720 44.96 59.94 74.176 HDTV 720p 60Hz HDCP
8. 1280x720 45.00 60 74.250 HDTV 720p 60Hz HDCP
9. 1920x1080 28.125 50.00 74.250 HDTV 1080i 50Hz HDCP
10. 1920x1080 33.72 59.94 74.176 HDTV 1080i 60Hz HDCP
11. 1920x1080 33.75 60 74.250 HDTV 1080i 60Hz HDCP
12. 1920x1080 27.000 24.00 74.250 HDTV 1080P 24Hz HDCP
13. 1920x1080 33.750 30 74.25 HDTV 1080P 30Hz HDCP
14. 1920x1080 56.25 50.00 148.500 HDTV 1080P 50Hz HDCP
15. 1920x1080 67.433 59.94 148.352 HDTV 1080P 60Hz HDCP
16. 1920x1080 67.50 60 148.500 HDTV 1080P 60Hz HDCP
8. HDMI input ( DTV )
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
3. 800x600 37.879 60.31 40.00 VESA
4. 1024x768 48.363 60.00 65.00 VESA(XGA)
5. 1280x768 47.78 59.87 80.125 VESA(WXGA)
6. 1360x768 47.72 59.8 84.625 VESA(WXGA)
7. 1280x1024 63.981 60.02 108 SXGA(Only FHD)
8. 1400x1050 65.317 59.978 121.75 SXGA(Only FHD)
9. 1920x1080 66.647 59.988 138.625 WUXGA
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No, Item Content Remark
1Product Dimenson Width(W) Length(D) Height(H) Unit
Before Packing 929 374.7 707 mm
After Packing 1015 277 782 mm
2Product Weight Only SET 21.7 Kg
With Box 26.2 Kg
3Container Loading Quantity Individual or 20ft 40ft
Palletizing Indi Wooden Indi Woonden
291 291 88
4Stand Assy Type Attachde(detachable)
Size(W x D x H) 460 375.4 234.1 mm
Tilt Degree -
Tilt force -
Swivel Degree Swivel(+/- 20degree)
Swivel Force 1.0 ~ 2.0kgf
5Appearance Refer to Standard of LG(56)G4-9002
No, Item Content Remark
1Product Dimenson Width(W) Length(D) Height(H) Unit
Before Packing 1037.6 378 795 mm
After Packing 1330 257 844 mm
2Product Weight Only SET 22.7 Kg
With Box 27.2 Kg
3Container Loading Quantity Individual or 40ft 40ft(H-CUBIC)
Palletizing Indi Wooden Indi Woonden
162 243
4Stand Assy Type Attachde(detachable)
Size(W x D x H) 520.1 379.5 265.1 mm
Tilt Degree -
Tilt force -
Swivel Degree Swivel(+/- 20degree)
Swivel Force 0.8 ~ 1.5kgf
5Appearance Refer to Standard of LG(56)G4-9002
9. Mechanical specification
9-1. 37LG6000
9-2. 42LG6000
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No, Item Content Remark
1Product Dimenson Width(W) Length(D) Height(H) Unit
Before Packing 1152.8 434.5 867.6 mm
After Packing 1255 521 961 mm
2Product Weight Only SET 32.6 Kg
With Box 37 Kg
3Container Loading Quantity Individual or 40ft 40ft(H-CUBIC)
Palletizing Indi Wooden Indi Woonden
82 82
4Stand Assy Type Attachde(detachable)
Size(W x D x H) 580 434.5 286.2 mm
Tilt Degree -
Tilt force -
Swivel Degree Swivel(+/- 20degree)
Swivel Force 1.5 ~ 1.9kgf
5Appearance Refer to Standard of LG(56)G4-9002
9-3. 47LG6000
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ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LD89F chassis
manufactured at LG TV Plant all over the world.
2. Specification
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 100~240V,
50/60Hz.
2.5 The receiver must be operated for about 15 minutes prior
to the adjustment.
- After RGB Full White in HEAT-RUN Mode, the receiver
must be operated prior to the adjustment.
- Enter into HEAT-RUN MODE
(1) Press the "POWER ON" KEY on Adjustment R/C.
(2) Press the "ADJ KEY" on Adjustment R/C.
(3) Select "3. Test Pattern" by using D/E(CH +/-) and
press ENTER(V)
(4) Select "White" by using F/G(VOL +/-) and press
ENTER(V)
• Set is activated HEAT run without signal generator in
this mode.
• Single color pattern ( RED / BLUE / GREEN ) of HEAT
RUN MODE uses to check panel.
• Caution : If you turn on a still pattern more than 20
minutes (Especially digital pattern, cross hatch
pattern),an after image may be occur in the black level
part of the screen.
3. PCB assembly adjustment method
=> Caution: Using ‘power on’ button of the Adjustment R/C ,
power on TV.
• ADC Calibration Protocol (RS232)
- Baud rate : 115200 bps
- RS232 Host : PC
- echo : none
4. ADC adjustment
• Adjustment can be done using only internal ADC, so input
signal is not necessary.
• Required equipment : Adjustment R/C.
1) Press ADJ key on adjustment R/C.
2) Select "1. ADC calibration" by using D/E(CH +/-) and
press ENTER(V)
3) Select "Start" by using F/G(VOL +/-) and press
ENTER(V)
4) ADC adjustment is executed automatically
NO Item CMD 1 CMD 2 Data 0
Enter
Adjust ‘Mode In’ AD00 When transfer the 'Mode In'
Adjust MODE
Carry the command.
ADC adjust ADC Adjust A D 1 0
Automatically adjustment
(The use of a internal pattern)
Adjust ‘Mode Out’ AD90
Adjustment A D 9 9
To check ADC Adjustment
Confirmation on Assembly line.
RF input AV / Component / RGB input
NO SIGNAL or White noise NO SIGNAL
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5. PCMCIA CARD Checking Method
• You must adjust DTV 29 Channel and insert PCMCIA
CARD to socket.
1) If PCMCIA CARD works normally, normal signals display
on screen. But it works abnormally, "No CA module" words
display on screen.
=> Caution: Set up "RF mode" before launching products.
6. Adjustment of White Balance
• Test Equipment
- Color Analyzer (CS-1000, CA-100+(CH.9), CA-210(CH.9) )
* Please adjust CA-100+ / CA-210 by CS-1000 before
measuring
=> You should use Channel 9 which is Matrix compensated
(White, Red, Green, Blue revised) by CS-1000 and adjust
in accordance with White balance adjustment coordinate
• Color temperature standards according to CSM and Module
• Change target luminance and range of the Auto adjustment
W/B equipment.
• White balance adjustment coordinate and color temperature
* PC (for communication through RS-232C) => UART Baud rate :
115200 bps
* Connecting picture of the measuring instrument (On
Automatic control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C IN-START -> Enter the
mode of White-Balance, the pattern will come out.
Auto-control interface and directions
1. Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10ux).
2. Adhere closely the Color Analyzer (CA-210) to the module
less than 10cm distance, keep it with the surface of the Module
and Color Analyzer’s Prove vertically.(80~100°).
3. Aging time
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 15 minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others, check
the back light on.
6. Manual white Balance
1) Press the ADJ KEY on Adjustment R/C.
Select "3. Test Pattern" by using D/E(CH +/-) and press
ENTER(V)
Select "White" by using F/G(VOL +/-) and press
ENTER(V) and heat run over 15 minutes.
2) Zero Calibrate CA-100+ / CA-210, and when controlling,
stick the sensor to the center of LCD module surface.
3) Press the ADJ KEY on Adjustment R/C
4) Select "2. White Balance" and press G(VOL +)
Set test-pattern on and display inside pattern.
5) Control is carried out on three color temperatures, COOL,
MEDIUM, WARM.
(Control is carried out three times)
< Temperature: COOL >
- R-Cut / G-Cut / B-Cut is set to 64.
- Control R-Gain and G-Gain.
- Each gain is limited to 192.
< Temperature: MEDIUM >
- R-Cut / G-Cut / B-Cut is set to 64.
- Control R-Gain and B-Gain.
- Each gain is limited to 192.
< Temperature: WARM >
- R-Cut / G-Cut / B-Cut is set to 64.
- Control G-Gain and B-Gain.
- Each gain is limited to 192.
* One of R Gain / G Gain / B Gain should be kept on 192, and
adjust other two lower than 192.
(When R/G/B GAIN are all 192, it is the FULL DYNAMIC Range
of Module)
CSM LCD
Cool 11000K
Medium 9300K
Warm 6500K
Target luminance 65
Range 20
Cool CS-1000 CA-100+ (CH.9) CA-210 (CH.9)
x0.276 0.276±0.002 0.276±0.002
y0.283 0.283±0.002 0.283±0.002
uv 0.000 0.000 0.000
Medium CS-1000 CA-100+ (CH.9) CA-210 (CH.9)
x0.285 0.285±0.002 0.285±0.002
y0.293 0.293±0.002 0.293±0.002
uv 0.000 0.000 0.000
Warm CS-1000 CA-100+ (CH.9) CA-210 (CH.9)
x0.313 0.313±0.002 0.313±0.002
y0.329 0.329±0.002 0.329±0.002
uv 0.003 0.003 0.003
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1-1. The whole flowchart which it follows in voltage output state
1. Power Board
No No No
Start check
Does not screen whole comes out?
Does not
low voltage output comes
out?
Does not
Inverter signal output
comes out?
No No No
Yes Yes No Yes
Is the Interface signal operated?
2. Check the Interface signal condition
Yes Yes
Does not the
INV 24V voltage output
comes out?
Yes
Yes
Is it identical with
power off condition?
1. Check the Power off condition
Yes
Does not the
St-by 5V(P-5V) signal
comes out?
Yes
Does not the
VSC signal INV_CTL
comes out?
Yes
Manufacture enterprise meaning of a passage
No
6. Check the VSC low Voltage output
Yes
Does not the
AC Detect signal
comes out?
Does not the
RL_ON/PWR_ON/OFF
comes out?
Does not the VSC
Low Voltage output
comes out?
3. Check the St_by 5V signal circuit 4. Check the AC Detect signal circuit 5. Check the VSC RL_ON?PWR_ON/OFF signal
7. Check the VSC INV_CTL signal 8. Check the INV 24V voltage output circuit
TROUBLE SHOOTING
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A power cord is plugged in with TV set? Plug the power cord in.
No
Is AC-INLET connected with the power board?
Yes
Connect the AC-INLET.
No
Are the fuses(F100, F101 or F700) OK on the power board?
Yes
Replace the fuses.
No
Symptom
1) It does not charge at module. 2) Front LED does not work
Check the followings
Is the power board connected with VSC Board though a cable? Connect a cable.
No
Yes Yes
2. No Power
Measure output voltages(16V,12V,5V) on the power board.
If the measured values are not a proper value, replace power board.
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Symptom
1) No OSD and image occur on the screen. 2) It maintains the condition with the front LED is white.
Check the followings
Does Module control signal OK? No
Yes
Is the Inverter OK?
Is Low/High voltage outputs properly
except stand-by 5V?
No Replace the
Power board.
No
Check the LCD Module
Yes
Is the LVDS cable OK?
Reconnect the LVDS cable in P501 or P502.
No
Yes
Is the IC100 (FLI106X0H) Output normal? Replace the VSC
No
3. No Raster
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LGE Internal Use Only
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Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
C2008
2) In case of abnormal display on the screen in specific mode
Symptom
1) The screen does not display the picture from specific input mode
(RF,DTV, AV, Component, RGB, HDMI).
Check the followings
Is the input voltage and CVBS output
for the tuner OK?
Is the tuner OK?
In case of abnormal display on the screen when RF mode.
Is the RF cable
connected with TV set?
Connect the RF cable. Replace the tuner.
Is IC100(FLI106X0H) OK? Is the IIC communication waveform
between the tuner and IC100 OK? Replace IC100(FLI106X0H)
No
Yes
No No
No
No
Yes
Block A
In the case of abnormal display on the screen when USB mode.
Is USB 5V Power OK?
Yes
No
Replace IC902
Is USD DP/DM
waveform OK?
No
Same as Block A
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C2008
In the case of abnormal display on the screen when side AV1,2 / AV3 mode.
Same as Block A
In the case of abnormal display on the screen when Component, RGB mode.
In the case of abnormal display on the screen when HDMI1,2,3 mode.
Is the HDMI switch
(IC200) OK?
Is the TMDS waveform between
the IC and HDMI jacks OK? Replace IC200
No No
Yes
Is video input of the AV
(JK100,JK101,JK103) OK?
Yes
No
Check the input source.
Is R,G,B input and H/V
sync of the JK102,P101 OK?
Yes
No
Check the input source.
Same as Block A
Same as Block A
In the case of abnormal display on the screen when HDMI4 mode.
Is the HDMI Jack
(JK204) OK?
Is the TMDS waveform between
the IC and HDMI jacks OK? Replace JK204
No No
Yes
Same as Block A
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