LG 42LB2DE Series User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LB61D
MODEL : 42LB2DE 42LB2DE-AA
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ..........................................................................3
SPECIFICATION........................................................................................6
ADJUSTMENT INSTRUCTION ...............................................................12
TROUBLE SHOOTING............................................................................17
BLOCK DIAGRAM...................................................................................23
EXPLODED VIEW .................................................................................. 24
REPLACEMENT PARTS LIST ............................................................... 26
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
T
o Instrument's
e
xposed
M
ETALLIC 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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1. Application range
This specification is applied to LB61D chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below
condition.
(1) Temperature : 25°C±5°C(77±9°F), CST : 40±5°C
(2) Humidity : 65±10%
(3) Power : Standard input voltage (AC 100-240V, 50/60Hz)
*Standard Voltage of each products is marked by models
(4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(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 : CB Specification
EMC : CISPR 13 Specification
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
4. General TV Specification
No Item Specification Remark
1. Broadcasting system PAL-B/G, DTV : DVB-T
2. Available Channel 1) VHF : 00 ~ 12
2) UHF : 20 ~ 75
3) CATV: 02 ~ 44
4) DTV : 06 ~ 12, 27 ~ 69
3. Tuner IF 1) PAL : 38.90MHz(Picture),
34.40MHz(Sound)
2) DVB-T : 36.125MHz
4. Input Voltage AC 240 V, 50Hz Maker : LGE
5. Aspect ratio 16:9 (wide)
6. Operating Temperature 0 40 deg
7. Operating Humidity 85 %
8. Storage Temperature -20 60 deg
9. Storage Humidity 85 %

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5. Chroma & Brightness
5-1. 47LB2DE
No Item Min Typ Max Unit Remark
1. White peak Brightness 450 550 cd/m2
(Center 1-point/Full White Pattern)
2. White average brightness cd/m2
3. Brightness uniformity 80 %
4. Color coordinate RED X Typ 0.638 Typ
Y - 0.03 0.340 + 0.03
GREEN X 0.279
Y 0.611
BLUE X 0.146
Y 0.062
WHITE X 0.272
(Standard) Y 0.278
5. Contrast ratio 600:1 800:1 - Full white(100IRE)
- Full black(0IRE)pattern
- Picture:Dynamic(Cool)
- Input : TV/DTV/AV1,2
Comp1,2/RGB/HDMI1,2
Medium 8,300 9,300 10,300
Cool 11,000 12,000 13,000
Warm 5,500 6,500 7,500
6. Color Temperature 10.0 % <Test Signal>
HDMI Input,
85% Full white pattern
7. Color Distortion, DG 10.0 deg
8. Color Distortion, DP 43.0 dB
9. Color S/N, AM/FM -80 dBm
10. Color Killer Sensitivity

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5-2. 42LB2DE
No Item Min Typ Max Unit Remark
1. White peak Brightness 400 500 cd/m2
(Center 1-point/Full White Pattern)
2. White average brightness cd/m2
3. Brightness uniformity 80 %
4. Color coordinate RED X Typ 0.638 Typ
Y - 0.03 0.340 + 0.03
GREEN X 0.279
Y 0.611
BLUE X 0.146
Y 0.062
WHITE X 0.272
(Standard) Y 0.278
5. Contrast ratio 1100:1 1600:1 - Full white(100IRE)
- Full black(0IRE)pattern
- Picture:Dynamic(Cool)
- Input : TV/DTV/AV1,2
Comp1,2/RGB/HDMI1,2
Medium 8,300 9,300 10,300
Cool 11,000 12,000 13,000
Warm 5,500 6,500 7,500
6. Color Temperature 10.0 % <Test Signal>
HDMI Input,
85% Full white pattern
7. Color Distortion, DG 10.0 deg
8. Color Distortion, DP 43.0 dB
9. Color S/N, AM/FM -80 dBm
10. Color Killer Sensitivity
* Peak & average Brightness & Contrast measure
standard specification
# White Peak brightness measure specification
1) In non-impressed condition , measure peak brightness
displayable as much as possible LCD module.
2) Measuring instrument : CA-110 or a sort of Color Analyzer.
3) Pattern Generator : VG-828 or a sort of digital pattern
generator (displayable Full White & 1/25 White Window
pattern)
4) Measure condition
- Test pattern : in center, 1/5(H) * 1/5(V) of Window Pattern
(white pattern in non-impressed condition)
- SET condition : Contrast & Brightness Level 100%
- Environment condition : Dark room in the non outside light
5) Measurement
-Do heat-run LCD module at 30 minutes in normal
temperature (25°C) by using full white pattern of 15%
signal level(38 gray)
- Impress test pattern signal in 1/5(H) * 1/5(V) White
Window of 100%(255Gray Level)
- Measure 3 times brightness of central white window, and
mark peak brightness in max brightness degree
- Measure the same condition in video signal /RGB signal.
* Average Brightness measure specification
1) Impress 100%(255Gray Level) full white pattern at the
same peak brightness measurement.
2) Measure average brightness in 9 points.
* Contrast ratio measure specification
1) Test display signal : 30*30 dots White Window signal & all
Black Raster signal
2) Dark room measure condition : Using touch type Color
analyzer CA-100 Dark room in the non outside light
3) Bright room measure condition : In bright room of 150Lx
illumination in the panel surface, locate a source of light on the
above 45° of the panel surface.
4) Measure method
- In standard test condition, impress 30*30 dots White
Window Pattern signal .
Measure center peak brightness degree Lw of white
window
-Impress black Raster signal as contrast ratio
measurement signal.
Measure black brightness degree Lb of PDP central
Calculate the following numerical formula .
Contrast ratio = Lw / Lb
If it does not use Prior measurement, use generally simple test
measurement.
The Correct measure specification is followed by IEC61988-
2/CD, JAPAN EIAJ-2710

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6. Component Video Input (Y, PB, PR)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
1. 720*576 15.625 50.00 13.50 SDTV576i
2. 720*576 31.25 50.00 27.00 SDTV576p
3. 720*480 15.73/15.75 59.94/60.00 13.50 SDTV 480i
4. 720*480 31.47/31.50 59.94/60.00 27.00 SDTV 480p
5. 1280*720 44.96/45.00 59.94/60.00 74.25 HDTV 720P
6. 1280*720 37.50 50.00 74.25 HDTV 720P
7. 1920*1080 33.72/33.75 59.94/60.0 74.25 HDTV 1080i
8. 1920*1080 28.125 50.00 74.25 HDTV 1080i
10 1920*1080 27.000 24.000 HDTV 1080P
11. 1920*1080 26.97 23.94 HDTV 1080P
12. 1920*1080 33.75 30.000 HDTV 1080P
13. 1920*1080 33.71 29.97 HDTV 1080P
7. RGB input (DTV / PC)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
DTV
1. 720*576 31.25 50.00 27.00 SDTV576p
2. 720*480 31.47/31.50 59.94/60.00 27.00 SDTV 480p
3. 1280*720 44.96/45.00 59.94/60.00 74.25 HDTV 720P
4. 1280*720 37.50 50.00 74.25 HDTV 720P
5. 1920*1080 33.72/33.75 59.94/60.0 74.25 HDTV 1080i
6. 1920*1080 28.125 50.00 74.25 HDTV 1080i
PC
1. 640*350 31.468 70.09 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. 640*480 37.861 72.80 31.50 VESA(VGA)
5. 640*480 37.500 75.00 31.50 VESA(VGA)
6. 800*600 35.156 56.25 36.00 VESA(SVGA)
7. 800*600 37.879 60.31 40.00 VESA(SVGA)
8. 800*600 48.077 72.18 50.00 VESA(SVGA)
9. 800*600 46.875 75.00 49.50 VESA(SVGA)
10. 1024*768 48.363 60.00 65.00 VESA(XGA)
11. 1024*768 56.476 70.06 75.00 VESA(XGA)
12. 1024*768 60.023 75.02 78.75 VESA(XGA)
13. 1280*768 47.776 59.870 79.5 CVT(WXGA)
14. 1360*768 47.720 59.799 84.750 CVT(WXGA)
15. 1366*768 47.13 59.65 72.00
16. 1920*1080 56.25 50 148.5 HDTV 1080P
17. 1920*1080 67.5 60 148.5 HDTV 1080P

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8. HDMI input (DTV / PC)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
DTV
1. 720*576 31.25 50.00 27.00 SDTV576p
2. 720*480 31.47/31.50 59.94/60.00 27.00 SDTV 480p
3. 1280*720 44.96/45.00 59.94/60.00 74.25 HDTV 720P
4. 1280*720 37.50 50.00 74.25 HDTV 720P
5. 1920*1080 33.72/33.75 59.94/60.0 74.25 HDTV 1080i
6. 1920*1080 28.125 50.00 74.25 HDTV 1080i
7. 1920*1080 67.43 59.94 148.35 HDTV 1080P
8. 1920*1080 56.250 50 148.50 HDTV 1080P
9. 1920*1080 67.500 60 148.50 HDTV 1080P
10. 1920*1080 27.000 24.000 HDTV 1080P
11 1920*1080 26.97 23.94 HDTV 1080P
12. 1920*1080 33.75 30.000 HDTV 1080P
13. 1920*1080 33.71 29.97 HDTV 1080P
PC(only HDMI input 1)
1. 640*480 31.469 59.94 25.17 VESA(VGA)
2. 640*480 37.861 72.80 31.50 VESA(VGA)
3. 640*480 37.500 75.00 31.50 VESA(VGA)
4. 800*600 35.156 56.25 36.00 VESA(SVGA)
5. 800*600 37.879 60.31 40.00 VESA(SVGA)
6. 800*600 48.077 72.18 50.00 VESA(SVGA)
7. 800*600 46.875 75.00 49.50 VESA(SVGA)
8. 1024*768 48.363 60.00 65.00 VESA(XGA)
9. 1024*768 56.476 70.06 75.00 VESA(XGA)
10. 1024*768 60.023 75.02 78.75 VESA(XGA)
11. 1280*768 47.776 59.870 79.5 CVT(WXGA)
12. 1360*768 47.720 59.799 84.750 CVT(WXGA)
13. 1366*768 47.13 59.65 72.00
14. 1920*1080 56.250 50 148.50 HDTV 1080P
15. 1920*1080 67.500 60 148.50 HDTV 1080P

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9. LCD MODULE
No Item Typ Unit Remark
1 Display area 1039.68(H) X584.82(V) mm
2 Outline Dimension 1096(H) x 640(V) x 48.1(D) mm Typ.
3 Pixel Pitch 0.5415 x 0.5415
4 Number of Pixels 1920(H)x1080(V)
5 Color Depth 8bit 16.7 Mbit
6 Weight 18 20 22 kg
7 Weight(gross) TBD kg
8 Operating Environment Temp : 0 ~ 40 deg
Humidity : 10 ~ 90 %
Altitude : 0 ~ 14,000 feet
9 Storage Environment Temp : -20 ~ 50 deg
Humidity : 10 ~ 90 %
Altitude : 0 ~ 40,000 feet
10 Display Mode Transmissive Mode, Normally Black
11 Surface Treatment Hard Coating (3H)
Anti-glare treatment of the front polarizer
9-1. 47LB2DE
No Item Typ Unit Remark
1 Active Screen Size 42.02 inch(1067.31mm) mm
2 Outline Dimension 983.0(H) x576.0(V) x 51.0(D) mm Typ.
3 Pixel Pitch 0.4845 x 0.4845
4 Number of Pixels 1920(H)x1080(V)
5 Color Depth 8bit 16.7 Mbit
6 Weight 13.0 kg
7 Luminance, White 550 cd/m2(Center 1point, Typ) kg
8 Power Consumption Total 167.3 Watt(Typ)
9 Display Mode Transmissive Mode, Normally Black
10 Surface Treatment Hard Coating (3H)
Anti-glare treatment of the front polarizer
9-1. 42LB2DE

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ADJUSTMENT INSTRUCTION
1. Application Object
These instructions are applied to all of the 42"/47" LCD TV,
LB61D Chassis
2. Notes
(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 equipment.
(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver be must kept 220V, 60Hz
when adjusting.
(5) The receiver must be operational for about 15 minutes
prior to the adjustments.
OPreliminary action is applied to the test for afterimage
discharge detection, and 100% FULL WHITE PATTERN
must be operated automatically.
OTest for afterimage discharge detection
1) After pressing Power Only key(only operating by
pressing Power Only key), Full Test Pattern(2 min
30sec) --> Full Black Pattern(30sec) --> After this state,
Full White Pattern is displayed.
(but you must preset the program for Full White State
when you press the Main Power Off/On)
2) Pattern Mode is deselected by pressing CH +/-, Exit Key.
[ Set is activated HEAT-RUN without signal generator in
this mode.
If you turn on a still screen more than 20 minutes (Especially
Digital pattern, Cross Hatch Pattern), an afterimage may occur
in the black level part of the screen.
3. CPLD Download
(1) Test Equipment: PC, Jig for download
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click icon.
(5) End after confirming.
4. Sub-ucom Download
(1) Test Equipment: PC, Jig for download
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click icon.
(5) End after confirming.
5. MST3361M-Set Adjustment
5-1. Synopsis
MST3361M-Set adjustment to set the black level and the Gain
of optimum with an automatic movement from the analog =>
digital converter.
5-2. Test Equipment
Service R/C, 801GF(802B,802F,802R),
MSPG-925 Pattern Generator.
(480i, 1080i 60Hz Color Bar Pattern output will be possible
and the output level will accurately have to be revised with
0.7±0.1Vp-p)
1. 480i => Model : 209, Pattern : 65
2. 1080i => Model : 223, Pattern : 65
5-3. Adjustment
(1) How to adjustment the Component1 480i
60Hz Mode
1) Select Component1 as the input with Color Bar Pattern
in 480i 60Hz mode and select ‘Component1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘2. ADC 480i Comp1’. Pressing the Vol+
Key to adjust the component1.
3) When the adjustment is over, 'ADC Component1
Success’ is displayed. If the adjustment has errors,
'ADC Configuration Error’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
PC
VSC
B/D
JIG cable(EPLD D/L)
<Fig. 1> Connection Diagram of CPLD Download
(Fig. 2) Adjust Pattern : 480i, 1080i 60Hz Color Bar Pattern

(2) How to adjustment the Component1 1080i
60Hz Mode, RGB
1) Select Component1, RGB-DTV as the input with Color
Bar Pattern in 1080i 60Hz mode and select
‘Component2’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘3. ADC 1080i Comp2/RGB’. Pressing
the Vol+ Key to adjust the component2.
3) When the adjustment is over, 'ADC Component1
Success’ is displayed. If the adjustment has errors,
'Component2 Adjustment Failed! Try Again!’ is
displayed. and If the adjustment has errors, 'ADC
Configuration Error’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
6. Video(uPD)-Set
6-1. Synopsis
This is a adjustment to reduce the color difference of video
signal Main/Sub Display.
6-2. Required Equipment
Service R/C, MSPG-925 Pattern Generator.
(It’s available to output the Color Bar Pattern of the NTSC,PAL)
1. NTSC => Model : 201, Pattern : 33
2. PAL => Model : 202, Pattern : 33
6-3. Adjustment
(1) How to adjustment the uPD PAL
1) Select AV1 as the input with 100% 8 Color Bar Pattern
in PAL mode and select ‘AV1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘4. uPD PAL(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD PAL.
3) When the adjustment is over, 'PAL-AV uPD ADC
Success’ is displayed. If the adjustment has errors,
'Video Configuration Error’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
(2) How to adjustment the uPD NTSC
1) Select AV1 as the input with 100% 8 Color Bar Pattern
in NTSC mode and select ‘AV1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘5. uPD NTSC(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD NTSC.
3) When the adjustment is over, 'NTSC-AV uPD ADC
Success’ is displayed. If the adjustment has errors,
'Video Configuration Error’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
(3) How to adjustment the uPD RF-PAL
1) Select AV1 as the input with 100% 8 Color Bar Pattern
in NTSC mode and select ‘AV1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘6. uPD RF-PAL(Main&Sub)-Set’.
Pressing the Vol+ Key to adjust the uPD NTSC.
3) When the adjustment is over, 'RF-PAL uPD ADC
Success’ is displayed. If the adjustment has errors,
'Video Configuration Error’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
- 13 -
(Fig. 3) Adjust Pattern :100% 8 Color Bar Pattern

7. EDID(The Extended Display
Identification Data)/DDC
(Display Data Channel) Download
This is the function that enables “Plug and Play".
7-1. HDMI/DVI PORT1 EDID DATA-42LB2DE
7-2. HDMI PORT2 EDID DATA-42LB2DE
7-3. RGB EDID DATA-42LB2DE
7-4. HDMI/DVI PORT1 EDID DATA-47LB2DE
7-5. HDMI PORT2 EDID DATA-47LB2DE
7-6. RGB EDID DATA-47LB2DE
- 14 -
0123456789ABCDEF
0 00FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01
30 01 01 01 01 01 01 F3 39 80 18 71 38 2D 40 58 2C
40 45 00 C4 8E 21 00 00 1E 1B 21 50 A0 51 00 1E 30
50 48 88 35 00 BC 88 21 00 00 18 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 68
80 02 03 1D F1 4E 20 22 10 1F 01 02 03 04 05 12 93
90 14 07 16 23 15 07 50 65 03 0C 00 10 00 01 1D 00
A0 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 01
B0 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00
C0 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 42
D0 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 4C
E0 6C 42 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
F0 80 4C 6C 42 00 00 9E 00 00 00 00 00 00 00 00 CC
0123456789ABCDEF
0 00FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01
30 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28
40 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20
50 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 FC 00 4C
60 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD
70 00 38 4B 1F 3C 09 00 0A 20 20 20 20 20 20 01 59
80 02 03 1D F1 4E 20 22 10 1F 01 02 03 04 05 12 93
90 14 07 16 23 15 07 50 65 03 0C 00 20 00 8C 0A D0
A0 8A 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C
B0 0A D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00
C0 18 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 9F
0123456789ABCDEF
0 00FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 18 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CE 00 01 01 01 01 01 01 01 01 01 01
30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 1C F3 39 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 DE
0123456789ABCDEF
0 00FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01
30 01 01 01 01 01 01 F3 39 80 18 71 38 2D 40 58 2C
40 45 00 C4 8E 21 00 00 1E 1B 21 50 A0 51 00 1E 30
50 48 88 35 00 BC 88 21 00 00 18 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 68
80 02 03 1D F1 4E 20 22 10 1F 01 02 03 04 05 12 93
90 14 07 16 23 15 07 50 65 03 0C 00 10 00 01 1D 00
A0 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 01
B0 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00
C0 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 42
D0 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 4C
E0 6C 42 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
F0 80 4C 6C 42 00 00 9E 00 00 00 00 00 00 00 00 CC
0123456789ABCDEF
0 00FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01
30 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28
40 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20
50 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 FC 00 4C
60 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD
70 00 38 4B 1F 3C 09 00 0A 20 20 20 20 20 20 01 59
80 02 03 1D F1 4E 20 22 10 1F 01 02 03 04 05 12 93
90 14 07 16 23 15 07 50 65 03 0C 00 20 00 8C 0A D0
A0 8A 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C
B0 0A D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00
C0 18 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 9F
0123456789ABCDEF
0 00FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 18 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CE 00 01 01 01 01 01 01 01 01 01 01
30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 1C F3 39 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 DE

- 15 -
7-4. Act or set the EDID S/W
1) As above Fig. 6, Connect the Set, EDID Download Jig, PC
& Cable.
2) Turn on the PC & EDID Download Jig. And Execute the
S/W : EDID TESTER Ver,2.5.
7-5. How to use the EDID S/W
1) Init the data.
2) Load the EDID data.(Open File)
3) Press the “Write Data & Verify”button. and input the
data.
4) If the writing is finished, you will see the “OK” message.
8. Adjustment of White Balance
8-1. Required Equipment :
(1) Color analyzer (CA-210 (CH 9) or similar product)
(2) Automatic adjustor (with automatic adjustment hour
necessity and the RS-232C communication being possible)
8-2. Connection Diagram of Equipment
for Measuring (Automatic Adjustment)
8-3. Process of automatic adjustment
(1) As using the white pattern for adjustment the inner part,
HDMI connection need not. But as lower part, the RS-232C
Command is used.
Wb 00 00 start of automatic adjustment the white balance.
Wb 00 10 Start of gain adjustment.(inside pattern)
Ja 00 ff Adjustment Date.
Jb 00 c0
...
Wb 00 1f Ending gain adjustment.
As occasion demands , adjust the offset.
(Wb 00 20(Start) , Wb 00 2f(end))
Wb 00 ff white balance ending automatic adjustment.
Caution) When you adjust, automatically, RS-232C
Command is used.
[ RS-232C Command (Automatic Adjustment)
[Analog(RGB) : Checksum(DD)
Digital(HDMI) : Checksum(6345)
Digital(HDMI1) : Checksum(E818)
216 FULL WHITE
CVBS Part
LCD TV
COLOR
ANALYZER
TYPE; CA-100
<Fig. 6> Connection Diagram of Automatic Adjustment
R Gain
G Gain
B Gain
R Offset
G Offset
B Offset
CENTER
(DEFAULT)(Hex)
00
00
00
C0
C0
C0
Min Max
(Hex)
40
40
40
Cool
40
40
40
Mid
40
40
40
Warm
RS-232C COMMAND
[CMD ID DATA]
Jg
Jh
Ji
Cool
Ja
Jb
Jc
Mid
Jd
Je
Jf
Warm

- 16 -
11. Shipping Conditions
No Item Value Remark
1 Power Off
2 CH Memory Analog C0,C5,C6,S11,C20,C35,C52,C68
Digital C43
3 Picture PSM Dynamic
Color temperature COOL
Advanced Cinema Off
Black Level Auto
4 Audio SSM Standard
AVL Off
Balance 0
TV speaker On
5 Time Auto clock On Manual Clock Enable
Off timer Off
On timer Off
Sleep timer Off
Auto sleep Off
6 Special Sub title Off
Child lock Off
ARC 16:9
Cinema Off
7 LOCK Lock system Off
Block programme All program unblocked
Parental guidance All Grade unblocked
Aux. block All Source unblocked
8 DVR Timeshift mode On
Record Quality Best
8 RGB Initial DTV
9 PIP Position Right Lower
10 Volume 30
11 Favorite No Program set

- 17 -
TROUBLESHOOTING
1. Power Board
1-1. The whole flowchart which it follows in voltage output state
Start check
Manufacture enterprise
meaning of a passage
1. Check the Power Off
condition.
Doesn't the
screen whole come
out?
Is it identical
with Power Off
condition?
Yes
Yes
No
No
No
No
No
2. Check the Interface
signal condition.
Is the Interface
signal operated?
Yes
3. Check the St-by 5V
signal circuit.
Doesn't the
low pressure output
come out?
Doesn't the
St-by 5V signal
come out?
Yes
Yes
No
4. Check the 5V Monitor
signal circuit.
Doesn't the
5V Monitor signal
come out?
Yes
7. Check the VSC Vs-ON
signal
Doesn't the
high tension output
come out?
Doesn't the
VSC signal Vs-ON
come out?
Yes
Yes
Does
high tension
output voltage Drop
occur?
When the
Y B/D Module
input connector is
removed, does output
voltage drop
occur?
When the
Y, Z B/D Module
input connector is remove,
does Power Board hightension
output voltage Drop
occur?
Yes No No
9. Check the Power
Board Output high
tension circuit
Yes
10. Check the Z B/D
Module output circuit
Yes
When the
Z B/D Module
input connector is
removed, does output
voltage Drop
occurs?
11. Check the Y B/D
Module output circuit
Yes
No
8. Check the Vs, Va
voltage output circuit.
Doesn't the
Vs, Va voltage output
come out?
Yes
No
No
5. Check the VSC RL-ON
signal.
Doesn't the
VSC signal RL-ON
come out?
Yes
6. Check the VSC low
pressure output
Doesn't the
VSC low pressure
output come out?
Yes

- 18 -
1-2. 42” Power Board Structure
T801: Vs Trans
T901: Va Trans
T112: Low Voltage Trans
T501: ST-BY Trans
T601: PFC Inductor

- 19 -
2. In case of occurring strange screen into specific mode
2-1. In case the OSD does not displayed
(1) Symptom
1) LED is white.
2) Some discharge on Panel becomes accomplished continuously.
(2) Check follow
Is the LVDS cable
normal ?
Is the VSC Board
normal?
Is the LVDS cable
connected well?
Cable inserts well.
Yes
No
No
Yes
Does the Thine IC
(IC900) Operates ?
Replace Thine
(IC900).
No
Is the Ctrl Board of
Module normal? Replace Ctrl B/D.
No
No
Replace Scaler
(IC401).
No
Does the Scaler
(IC401) Operates ? Replace VSC Digital B/D.
Replace the cable.
Yes
Yes Yes

- 20 -
2-2. In case of does’t display the screen into specific mode
(1) Symptom
1) The screen does not become the display from specific input mode.
(RF, AV, Component, RGB, DVI)
(2) Check following
1) Check the all input mode should become normality display .
2) Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become
normality display from the PIP mode or DW mode.
(Re-Check using Swap function)
Check the NEC64015(IC701) if the main picture is abnormal, and
Check the NEC64015(IC801) If the sub picture is abnormal.
(3) When Analog TV mode is abnormal
(4) When AV mode is abnormal
Is the Splitter normal?
Is the Flat Cables
normal? Replace Flat Cables.
Is the Tuner Cable
connected well?
Cable inserts well.
Yes
No
No
Yes
Is the CXA2069Q(IC100)
normal?
Replace the Tuner.
No
Is the Input voltage, IIC Communication
and CVBS output normal?
No
Is normal the Input voltage, IIC
Communication and HV sync?
No Replace the IC. No
Yes
Is the uPD64015
normal? Is normal the Input voltage, IIC
Communication and HV sync?
Is normal the Input voltage, IIC
Communication and HV sync?
Is normal the Input voltage, IIC
Communication and HV sync?
No Replace the IC. No
Is the CXA2069Q
normal?
Yes
Is the uPD64015
normal?
No Replace the IC. No
No Replace the IC. No
Is normal the Input voltage, IIC
Communication and HV sync?
Yes
Is the Scaler normal? No Replace the IC.
No
Yes