LG DU-30LZ30 User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : AL-03HA
MODEL : DU-30LZ30
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION........................................................................................6
TIMING CHART .........................................................................................9
ADJUSTMENT INSTRUCTION ...............................................................10
SVC REMOCON ......................................................................................13
TROUBLE SHOOTING............................................................................14
BLOCK DIAGRAM...................................................................................17
WIRING DIAGRAM..................................................................................19
EXPLODED VIEW .................................................................................. 21
EXPLODED VIEW PARTS LIST..............................................................22
REPLACEMENT PARTS LIST ............................................................... 23
SVC. SHEET ...............................................................................................

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
X-RADIATION, 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.
Due to high vacuum and large surface area of picture tube,
extreme care should be used in handling the Picture Tube. Do
not lift the Picture tube by it's Neck.
X-RAY Radiation
Warning:
To determine the presence of high voltage, use an accurate high
impedance HV meter.
Adjust brightness, color, contrast controls to minimum.
Measure the high voltage.
The meter reading should indicate
23.5 1.5KV: 14-19 inch, 26 1.5KV: 19-21 inch,
29.0 1.5KV: 25-29 inch, 30.0 1.5KV: 32 inch
If the meter indication is out of tolerance, immediate service and
correction is required to prevent the possibility of premature
component failure.
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
The source of X-RAY RADIATION in this TV receiver is the High
Voltage Section and the Picture Tube.
For continued X-RAY RADIATION protection, the replacement
tube must be the same type tube as specified in the
Replacement Parts List.
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

- 4 -
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.
d. Discharging the picture tube anode.
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. Discharge the picture tube anode only by (a) first connecting
one end of an insulated clip lead to the degaussing or kine
aquadag grounding system shield at the point where the picture
tube socket ground lead is connected, and then (b) touch the
other end of the insulated clip lead to the picture tube anode
button, using an insulating handle to avoid personal contact with
high voltage.
4. Do not spray chemicals on or near this receiver or any of its
assemblies.
5. 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.
6. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
7. 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.
8. 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.
9. 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.
SERVICING PRECAUTIONS

- 5 -
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.
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 ML-027C chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below
condition.
(1) Temperature: 25°C ± 5°C
(2) Humidity: 65% ± 10%
(3) Power: Standard input voltage (AC 100-240V, 50/60Hz)
(4) Measurement must be performed after heat-run more than
15min.
(5) Adjusting standard for this chassis is followed a special
standard.
3. Test and Inspection method
(1) Capacity: Follow LG electronics TV Testing Standard.
(2) Another Required Standard
EMI: Following CE Standard(EN55020,EN55013)
SAFETY: Following CB Standard(EN60065)
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
4.General Specification
1
2
3
4
5
6
7
8
9
Receiving system
Available Channel
Input voltage
Screen Size
Aspect Ratio
Tuning System
LCD Module
Operting environment
Storage Environment
ATSC/64 & 256 QAM/NTSC-M
VHF : 02 ~ 13
UHF : 14 ~ 69
CATV : 01 ~ 135
DTV: 02 ~ 69
AC 100 - 260V/ 50Hz,60HZ
30 inch wide
16:9
FS
LC300W02-A5(1280 x 768)
1)Temp : 0 ~ 40 deg
2)Humidity : 10 ~ 90%
1)Temp : -20 ~ 50 deg
2)Humidity : 10 ~ 90%
Item Specification Remark
No.
SILM-VSB
LG Philips LCD

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5.Feature and Function
1
2
3
4
5
6
7
8
9
Feature
Key
SEUP
Video
Audio
Time
Option
Lock
Etc.
AV Input / Out
RGB Input
S-Input
DVI Input
Y, Pb, Pr Input
SPDIF Out
SPDIF Input
IR Input
RS-232C
Internal SPK Out
Local Key
EZ Scan
CH. Edit
DTV Signal
Ch. Label
Main Input
Sub Input
Front Display
SET ID
EZ Picture
User Control
XD
Color Temperature
Video Preset
Audio Language
EZ Sound Rite
EZ Sound
User Control
Front Surround
TV Speaker
Auto Clock
Manual clock
Off Timer
On Timer
Sleep Timer
Auto Off
Aspect Ratio
Caption
Caption Mode
Caption Option
Language
Cinema
Demo
Lock System
Set Password
Block Ch.
Movie Rating
TV Rating-Children
TV Rating-General
Aux.Block
Comb Filter
Remocon
Video1,2
AV Out (NTSC only)
Analog RGB
S-Input
DVI Input
Component 1, 2
SPDIF Out
DVI, Component 1
Cable IR (Cable IR)
S/W Download
L, R
TV/Video, Menu, OK( ), Volume( ), Channel (
), Power (Main)
Auto Channel Search
CH. Add/Delete
Bad/Normal/Good
CH. Logo
DTV/Analog/Video1/Video2/Component1/
Component2/RGB-DTV/DVI-DTV
DTV/Analog/Video1/Video2
Off/On
1 - 99
Off/Normal/Digital Preset/Night Time/
Movie/Weak Signal/VideoGame/Sports
Contrast/Brightness/Color/Sharpness/Tint
Off/On
Warm/Medium/ Cool
Factory Preset
English/Spanish/French
Off/On
Off/Normal/Stadium/Theater/Music
Balance/Treble/Bass
Off/3D EchoSound System/SRS TruSurround XT
Off/On
Off/On/Time Zone
Year/Data/Time
Off/On/Time
Off/On/Time/Ch./Vol
Off/10 min/20 min/30 min/60 min/90 min/120 min/180
min/240 min
Off/On
Set By Program/4:3/16:9/Horizon/Zoom1/
Zoom2/Cinema Zoom
Off/EZ Mute/On
CC1/CC2/CC3/CC4/Text1/Text2/Text3/Text4
Style/Size/Font/Text Color/Text Opacity/Bg Color/Bg
Opacity/Edge Type/Edge Color
English/Español/Français
Off/On
Ez Demo/XD Demo
Off/On
New/Confirm
O
G/PG/PG-13/R/NC-17/X
Age/Fantasy Violence
Age/Dialogue/Language/Sex/Violence
Video1/Video2/Component1/Component2/RGB/DVI
3D Comb(main), 4H Comb(sub)
LG code
Item Specification Remark
No.
Rear1, Front(CVBS, L, R)
Rear
Rear
Rear1, Front(Y, C)
Side
Rear
Rear
Rear
Rear
D-Sub 9pin
Built-in
DTV Only
RGB-DTV RGB-PC
DVI-DTV DVI-PC
DTV Only
DTV: Horizon disable
3D comb for main display,
4H comb for sub display

- 8 -
NO
1
2
3
4
5
6
Resoluton
640 x 480
704 x 480
1280 x 720
1280 x 720
1920 x 1080
1920 x 1080
H-freq(kHz)
15.73
31.47
45.00
44.96
33.75
33.72
V-freq(kHz)
60.00
59.94
60.00
59.94
60.00
59.94
Proposed
SDTV. DVD 480I
SDTV 480P
HDTV 720P
HDTV 720P
HDTV 1080I
HDTV 1080I
Pixel clock
NO
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Resoluton
PC
640 x 350
720 x 400
720 x 400
640 x 480
640 x 480
640 x 480
640 x 480
800 x 600
800 x 600
800 x 600
800 x 600
800 x 600
1024 x 768
1024 x 768
1024 x768
DTV
704 x 480
1280 x720
1280 x 720
1920 x 1080
1920 x 1080
H-freq(kHz)
31.468
31.469
37.927
31.469
37.861
37.500
43.269
35.156
37.879
48.077
46.875
53.674
48.363
56.476
60.023
31.47
45.00
44.96
33.75
33.72
V-freq(kHz)
70.09
70.08
85.03
59.94
72.80
75.00
85.00
56.25
60.31
72.18
75.00
85.06
60.00
70.06
75.02
59.94
60.00
59.94
60.00
59.94
Proposed
EGA
DOS
DOS
VESA(VGA)
VESA(VGA)
VESA(VGA)
VESA(VGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(XGA)
VESA(XGA)
VESA(XGA)
SDTV 480P
HDTV 720P
HDTV 720P
HDTV 1080I
HDTV 1080I
DDC
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Pixel clock
25.17
28.32
35.50
25.17
31.50
31.50
36.00
36.00
40.00
50.00
49.50
56.25
65.00
75.00
78.75
6.Component Video Input(Y, CB/PB, CR/PR)
7.RGB Input(PC/DTV)

- 9 -
NO
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Resoluton
PC
640 x 350
720 x 400
720 x 400
640 x 480
640 x 480
640 x 480
640 x 480
800 x 600
800 x 600
800 x 600
800 x 600
800 x 600
1024 x 768
1024 x 768
1024 x768
DTV
704 x 480
1280 x720
120 x 720
1920 x 1080
1920 x 1080
H-freq(kHz)
31.468
31.469
37.927
31.469
37.861
37.500
43.269
35.156
37.879
48.077
46.875
53.674
48.363
56.476
60.023
31.47
45.00
44.96
33.75
33.72
V-freq(kHz)
70.09
70.08
85.03
59.94
72.80
75.00
85.00
56.25
60.31
72.18
75.00
85.06
60.00
70.06
75.02
59.94
60.00
59.94
60.00
59.94
Proposed
EGA
DOS
DOS
VESA(VGA)
VESA(VGA)
VESA(VGA)
VESA(VGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(XGA)
VESA(XGA)
VESA(XGA)
SDTV 480P
HDTV 720P
HDTV 720P
HDTV 1080I
HDTV 1080I
DDC
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Pixel clock
25.17
28.32
35.50
25.17
31.50
31.50
36.00
36.00
40.00
50.00
49.50
56.25
65.00
75.00
78.75
8.DVI Input(PC/DTV)

- 10 -
ADJUSTMENT INSTRUCTION
1. Scope of Application
These specifications are applied to all LCD TV models employing an AL-03HA
chassis.
2. Instruction
(1) Since this chassis is insulated from the power supply, it is not mandatory to
use an insulated-core transformer. But for the protection of adjustment
devices, it is recommended to power up the chassis between the power line
and the chassis input stage.
(2) Adjustment should be performed exactly in accordance with the instructed
sequence.
(3) Unless otherwise specified, adjustment should be done at an ambient
temperature 25°æ5oC and relative humidity of 65°æ10%.
(4) During adjustment, the power supply to the TV set should be maintained at
220V and 60Hz.
(5) Unless otherwise specified, heat-run the set by leaving it powered up for
about 15 minutes before adjustment.
During preliminary heat-run, the 100% White Pattern (CH 06) should be
displayed (or '3. White Pattern' of Ez-Adjust).
How to Get White Pattern
Push ADJ KEY on the adjustment remote controller and enter Ez-Adjust.
Select '3. White Pattern' with CH +/- KEY and push CONFIRM ( ) KEY.
Then the 100% Full White Pattern will appear.
* In this mode, you can heat run the set without a separate signal generator.
(Caution) If a static display is turned on for more than 20 minutes,
particularly the in-house digital pattern (CH 13) or the cross hatch pattern
(CH 09), care should be taken as an after-image may develop on the black
level part of the screen.
3. Adjustment
(1) Download EDID (Extended Display Identification Data) and DDC (Display
Data Channel).
(2) Adjust AD9883A-Set.
(3) Adjust color temperature (white balance).
(4) Adjust main and sub color.
4. Adjustment
4.1.DownloadEDID(ExtendedDisplayIdentification
Data)andDDC(DisplayDataChannel)
(1) Established by VESA, EDID is a function created to implement Plug and
Play that sets and makes available user environments by allowing the PC
and the monitor to automatically communicate and exchange data with
other without requiring the user to directly give commands to either the PC
or the monitor.
(2) EDID data for DVI of AL-03HA
EDID table =
(3) EDID data for RGB of AL-03HA
EDID table =
4-2.AdjustAD9883A-Set
4.2.1 Overview
AD9883A-Set adjustment is a function to automatically set the optimum
black level and gain in the analog-to-digital converter and compensate for
RGB deviation.
4.2.2 Devices Used
Adjustment remote controller and 801GF (802B, 802F, 802R) pattern
generator.
The latter should be capable of outputting the 720P vertical 100% color bar
pattern as shown below and its output level should be calibrated at 0.7
0.1Vp-p.
Be careful not to confuse the said pattern with the 75% color bar in the
neighborhood.
<Fig. 2> Adjustment pattern: 720P vertical color bar
4.2.3 Method of Adjustment
1) Input the 720P mode 100% vertical color bar pattern (TVBA-100) that can
be supported at a component input terminal, select Component 1 or
Component 2 for input, and select an appropriate display.
2) Wait one second or longer after signal reception, get into Ez-Adjust by
pushing ADJ KEY on the adjustment remote controller, select 1.AD9883-
Set, and push +KEY.
Adjustment will be carried out automatically.
3) When adjustment is completed normally, the message AD9883 Set
will be displayed. Otherwise, AD9883A Setup Error will appear instead.
4) If adjustment is not completed normally, repeat after checking the pattern
or adjustment conditions.
5) When adjustment is completed, escape adjustment mode by pushing the
ADJ KEY.
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00 FF FF FF FF FF FF 00 1E 6D 01 01 01 01 01 01
10 03 0E 01 03 18 6E 3E 96 08 E8 AA A1 57 49 9C 25
20 10 48 4B AF CE 00 31 4A 31 59 3B D9 45 59 61 4F
30 01 01 01 01 01 40 C3 1E 00 20 41 00 20 30 10 60
40 13 00 4C 6C 42 00 00 1E 00 00 00 FC 00 4C 47 20
50 4C 43 44 20 20 20 20 20 20 0A 00 00 00 FD 00 38
60 55 1E 3E 08 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 44 55 2D 33 30 4C 5A 33 30 20 20 20 20 00 BF
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00 FF FF FF FF FF FF 00 1E 6D 01 01 01 01 01 01
10 03 0E 01 03 98 6E 3E 96 08 E8 AA A1 57 49 9C 25
20 10 48 4B AF CE 00 31 4A 31 59 3B D9 45 59 61 4F
30 01 01 01 01 01 40 C3 1E 00 20 41 00 20 30 10 60
40 13 00 4C 6C 42 00 00 1E 00 00 00 FC 00 4C 47 20
50 4C 43 44 20 20 20 20 20 20 0A 00 00 00 FD 00 38
60 55 1E 3E 08 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 44 55 2D 33 30 4C 5A 33 30 20 20 20 20 00 3F

- 11 -
4.3 Adjust Color Temperature (White Balance)
(1) Devices Used
Color analyzer (CA-100 or equivalent)
Automatic adjustment device (Necessary for automatic adjustment. Should
be compatible with RS-232C communication.)
AV pattern generator
(2) Instrument Interconnection (For automatic adjustment)
(3) Method of Adjustment
Perform zero calibration on CA-100, which should remain perfectly
attached to the LCD module surface during adjustment
Manual adjustment should be done in the following sequence.
1) Press the Power On remote controller key.
2) Press the IN-START remote controller key. Then, select ‘4. UART
Control’ to see if the baud rate is 115200.
3) Press the ADJ remote controller key to enter the ‘Ez Adjust’ mode.
4) Select ‘7. WHITE PATTERN’ using CH + / - key and press the OK key
for a heat run longer than 15 minutes.
5) The AV Pattern Generator supplies the Window pattern signal. (external
input mode)
6) Set the image control state to "Comfortable image."
7) Put the sensor close to the center of the screen and press the ADJ
remote controller key. Then, select ‘5. White-Balance’ in ‘Ez Adjust’ and
press the right arrow key ( ) to start the adjustment mode.
8) Adjust High Light using R Gain / B Gain.
9) Use the volume + or – key for adjustment.
(G Gain: 127 / R Cut: 63 are the fixed value.)
Brightness value: High Light = 150±10 Cd
Color coordinate: X = 0.271 ±0.003, Y = 0.279 ±0.003
Color temperature: 12,000 K ±500 K
10) Press the OK ( ) key to move to the ‘Ez Adjust’ screen when
adjustment is completed. Then, press the ADJ key to exit from the
adjustment mode.
4.4 Adjust Main and Sub Color
This adjustment will reduce color difference between the main and sub
displays in PIP, POP, and SPLIT screen modes.
1) Input the in-house signal, wait one second or longer after signal
reception, get to Ez-Adjust by pushing ADJ KEY, select 2.
VPX3226 and get to the adjustment mode by pushing the right-hand
side ( ) key.
2) Get to the adjustment mode, and the display will automatically become a
TV 6CH SPLIT screen. A window will appear as follows.
3) At first adjust 1. Contrast (Main) in such a way that the characters US
6CH on the left-hand side of the main display are most distinct and
clear (and not saturated), and then
Adjust 2. Contrast (Sub) in such a way that the brightness of the sub
display on the right-hand side is the same as the main display. Use the
volume /- key for adjustment.
4) When adjustment is completed, escape adjustment mode by pushing
ADJ KEY.
1. AD9883A-Set
R-Gain adjustment value (default 128)
G-Gain adjustment value (default 128)
B-Gain adjustment value (default 128)
R-Offset adjustment value (default 64)
G-Offset adjustment value (default 64)
B-Offset adjustment value (default 64)
2. VPX3226
Contrast(Main) 31
Contrast(Sub) 31
3. White Balance
R-Gain adjustment value (default 127)
G-Gain adjustment value (default 127)
B-Gain adjustment value (default 127)
R-Cut adjustment value (default 63)
G-Cut adjustment value (default 63)
B-Cut adjustment value (default 63)
4. DVCO-Det
5. White-Pattern
<Fig .2>
VPX3226
1. Contrast(MAIN) 31
2. Contrast(Sub) 31
US 6CH US 6CH
EZ ADJUST
1. AD9883A-Set
2. VPX3226
3. White-Balance
4. DVCO-Set
5. White-Pattern
RS-232C
Window
MSPG-2100 or
MSTG-5200
High Light Adjustment
High Light Adjustment
COLOR
ANALYZER
TYPE; CA-100
CVBS Signal Input
LCD TV

- 12 -
EDID ADJUSTMENT
220
IBM
Compatible PC
Video Signal
Generator
PARALLEL PORT
Power inlet (required)
Power LED
ST Switch
Power Select Switch
(110V/220V)
Control Line
Not used
RS232C
PARALLEL
V-SYNC POWER
ST
VGS MONITOR
E
E
V-Sync On/Off Switch
(Switch must be ON.)
F
F
A
A
B
B
C
C
1510
5
569
1
1
1
14
13
25
6
5V
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11
Figure 1. Cable Connection
Windows EDID V1.0 User Manual
Operating System: MS Windows 98, 2000, XP
Port Setup: Windows 98 => Don’t need setup
Windows 2000, XP => Need to Port Setup.
This program is available to LCD Monitor only.
1. Port Setup
a) Copy “UserPort.sys”file to
“c:\WINNT\system32\drivers”folder
b) Run Userport.exe
c) Remove all default number
d) Add 300-3FF
e) Click Start button.
f) Click Exit button.
2. EDID Read & Write
1) Run WinEDID.exe
2) Edit Week of Manufacture, Year of Manufacture,
Serial Number
a) Input User Info Data
b) Click “Update”button
c) Click “Write”button

- 13 -
SVC REMOCON
1 POWER
2 POWER ON
3 MUTE
4 P-CHECK
5 S-CHECK
6 ARC
7 CAPTION
8 TXT
9 TV/AV
10 TURBO SOUND
11 TURBO PICTURE
12 IN-START
13 ADJ
14 MPX
15 EXIT
16 APC(PSM)
17 ASC(SSM)
18 MULTIMIDIA
19 FRONT-AV
20 CH
21 VOL
22 ENTER
23 PIP CH-(OP1)
24 PIP CH+(OP2)
25 PIP SWAP(OP3)
26 PIP INPUT(OP4)
27 EYE
28 MENU
29 IN-STOP
30 STILL
31 TIME
32 SIZE
33 MULTI PIP
34 POSITION
35 MODE
36 PIP
37 TILT
38 0~9
To turn the TV on or off
To turn the TV on automatically if the power is supplied to the TV. (Use the
POWER key to deactivate): It should be deactivated when delivered.
To activate the mute function.
To check TV screen image easily.
To check TV screen sound easily
To select size of the main screen (Normal, Spectacle, Wide or Zoom)
Switch to closed caption broadcasting
To toggle on/off the teletext mode
To select an external input for the TV screen
To start turbo sound
To start turbo picture
To enter adjustment mode when manufacturing the TV sets.
To adjust the screen voltage (automatic):
In-start mute Adjust AV(Enter into W/B adjustment mode)
W/B adjustment (automatic):
After adjusting the screen W/B adjustment Exit two times (Adjustment completed)
To enter into the adjustment mode. To adjust horizontal line and sub-brightness.
To select the multiple sound mode (Mono, Stereo or Foreign language)
To release the adjustment mode
To easily adjust the screen according to surrounding brightness
To easily adjust sound according to the program type
To check component input
To check the front AV
To move channel up/down or to select a function displayed on the screen.
To adjust the volume or accurately control a specific function.
To set a specific function or complete setting.
To move the channel down in the PIP screen.
To use as a red key in the teletext mode
To move the channel in the PIP screen
To use as a green key in the teletext mode
To switch between the main and sub screens
To use as a yellow key in the teletext mode
To select the input status in the PIP screen
To use as a blue key in the teletext mode
To set a function that will automatically adjust screen status to match
the surrounding brightness so natural color can be displayed.
To select the functions such as video, voice, function or channel.
To set the delivery condition status after manufacturing the TV set.
To halt the main screen in the normal mode, or the sub screen at the PIP screen.
Used as a hold key in the teletext mode (Page updating is stopped.)
Displays the teletext time in the normal mode
Enables to select the sub code in the teletext mode
Used as the size key in the PIP screen in the normal mode
Used as the size key in the teletext mode
Used as the index key in the teletext mode (Top index will be
displayed if it is the top text.)
To select the position of the PIP screen in the normal mode
Used as the update key in the teletext mode (Text will be
displayed if the current page is updated.)
Used as Mode in the teletext mode
To select the simultaneous screen
To adjust screen tilt
To manually select the channel.
Shortcut keys
Shortcut keys
Shortcut keys
Use the AV
key to enter
the screen
W/B
adjustment
mode.
Shortcut keys
Shortcut keys
Shortcut keys

- 14 -
TROUBLESHOOTING
No Power
Replace Filter board
Replace D_power_board
Replace A_power_board
Push the POWER ON key.
OK
Connect the connectors
Check the
condition of the power-
related connectors.
Fail
Measure standby
voltage:
6V at D_board P810
pin no. 1
Fail
Pass
Pass
Measure digital
reference voltage:
24V at line filter P810
pin no. 1
Measure standby
voltage:
6V at D_board P818
pin no. 6
Fail
Pass
Measure analog
reference voltage:
24V at A_board P818
pin no. 15
Does the set turn on
normally?
NO
Pass Pass
Check the POWER
ON signal level:
D_board P811 pin no.
2 and 3 > 0.8V
Measure
D_board supply voltage:
3.3V at P810 pin no. 7
6V at pin no. 11, and 12V at
pin no. 3

- 15 -
No Raster
Measure standby
voltage:
6V at D_board P810 pin
no. 1
Check no. power.
(Go to No power)
Fail
Pass
Pass
Replace D_board
Measure standby
voltage:
6V at A_board P818
pin no. 6
Check no. power.
(Go to No power)
Fail
Pass
Pass
Measure standby
voltage:
5V at A_board P820
pin no. 1
Fail
Pass
Pass
Replace A_board
Measure
Supply voltage :
3.3V at D_board P810 pin
no. 7, 6V at pin no 11,
12V at pin no 4
Check no. power.
(Go to No power)
Fail Pass
Replace D_board
Replace A_board
Measure module T-
con voltage:
12V at D_board
C1401
Fail
Pass
Replace D_board
Measure
analog supply:
6V and 3.3V at
A_board P818 pin no.
9 and 8, respectively
Fail
Replace D_board

- 16 -
No Sound
Check
sound supply:
18V at A_board P821
pin no. 3
Measure
A_power board trans
output:
4V at D_power_board P815
pin no. 4
Fail
Pass
Fail
Pass
Replace
D_power_board
Check
if A_board 18V is short-
circuited:
Resistance between A_board
P821 pin no.
2 and 3 infinity?
Fail
Check
output to the speaker:
Does P601 no. 1
waveform exist?
NO
Pass
Replace A_board
Replace A_board
Replace Speaker

BLOCK DIAGRAM
- 17 -

- 18 -
BLOCK DIAGRAM DESCRIPTION
ATSC/NTSC tuner (TDVB-001P) can receive both terrestrial analog and terrestrial digital signals.
But a NTSC tuner (6700NFNS06C) can receive terrestrial analog only. Therefore if you run two displays at the
same time, it is not possible to see two digital channels.
A/V SW (CXA2069) is the IC that takes external input terminal signals and broadcast signals from the tuners and
handles them selectively. Audio signals are
sent to MSP4450. Video signals are sent to HD-II via two paths - VPX3226E on the upper side is used to handle
sub displays, while VPX3225E on the lower
side controls the main display.
To the lower side, signals are sent using an expensive 3D-comb filter with Y/C divided.
The video decoder (VPX3226E) is a chip that decodes input signals.
HD-II is a chip that controls nearly all video-related functions, including brightness, sharpness, video formatting and
scaling. If digital broadcasting is available,
it comes through TP, which can be controlled from HD-II.
Video SW (CXA2151) is an IC that outputs video signals selectively. The selected one is outputted through ADC
(AD9883A) as a digital signal.
uCom (M37272) interfaces with the main CPU and primarily plays the role of controlling power supply, remote
controller and timers. Thus, while the set is
turned off, it sends time information to uCom for management.
TMDS Tx (Sil164) is the display stage that sends video data to the display medium according to the TMDS
protocol, and the TMSD receiver accepts it and
outputs display.
CPU (S3C440BX) is the central processing IC, which controls most of the ICs.

- 19 -
P805 P815
P800
P801
P411
P804P803
P812
P815
P810 P809
P1501
P813
P821
P1201
P1202
6
7
8
9
12
10
13 13 14
15
16
11
1
2
3
4
5
MAIN(Analog) MAIN(Digital)
POWER
LED & P/SW
CONTROL
SPEAKER SPEAKER
A/V
INVERTERINVERTER
WIRING DIAGRAM
No. Part No.
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
Wiring Part List
6631V00006Q 6631T20032L 6631T20032K 6631T25019T 6631T20028J 6631T20034A 6631T20030E 6631T20033M 6631T25019S 6631T25019Q 6631T25019U 6631V20023A 6631V10004A 6631T11017J 6851V00022D 6851V00022B

MEMO
- 20 -