LG 32LP1DC-UA User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : AL-04CA
MODEL : 32LP1DC-UA
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
ADJUSTMENT INSTRUCTION ...............................................................12
TROUBLE SHOOTING............................................................................15
BLOCK DIAGRAM...................................................................................18
WIRING DIAGRAM..................................................................................21
EXPLODED VIEW .................................................................................. 22
EXPLODED VIEW PARTS LIST..............................................................23
REPLACEMENT PARTS LIST ............................................................... 24
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
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.
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 LCD PANEL.
For continued X-RAY RADIATION protection, the replacement
panel must be the same type panel 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

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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 AL-04CA chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below
condition.
(1) Temperature: 25°C ± 5°C (CST 40°C ± 5°C)
(2) Humidity: 65% ± 10%
(3) Power: Standard input voltage (AC 100-260V, 50/60Hz)
(4) Measurement must be performed after heat-run more than
15min.
(5) Adjusting standard for this chassis is followed a special
standard.
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
3.General Specification
No Item Specification Remark
1. Receiving System ATSC/ 64 & 256 QAM/NTSC-M Slim-VSB
2. Available Channel VHF : 02~13
UHF : 14~69
CATV: 01~135
DTV: 02-69
3. Input Voltage AC 100 ~ 260V 50/60Hz
4. Market North America
5. Screen Size 32 inch wide
6. Aspect Ratio 16:9
7. Tuning System FS
8. LCD Module LC320W01-A6K3 (1366x768) LG Philips LCD
9. Operating Environment Temp. : 0 ~ 40 deg
Humidity : 10 ~ 90 %
10. Storage Environment Temp. : -20 ~ 50 deg
Humidity : 10 ~ 90 %
4. Feature and Function
No Item Specification Remark
1. Feature AV Input / Out 2 Video1,2 Rear1, Front1(CVBS,L,R)
RGB Input 2 Analog RGB1, Analog RGB2 Rear
S-Input 2 S-Input Rear1, Front1(Y,C)
DVI Input 1 DVI Input Side
Y, Pb, Pr Input 2 Component 1, 2 Rear
SPDIF Out 1 SPDIF Out Rear
SPDIF Input 1 SPDIF Input Rear
RS-232C 1 S/W Download D-Sub 9pin
Internal SPK Out 1 Mono, < 2W Remote Speaker
2. Key Local Key TV/Video, Menu, OK( ), Volume( ,),
Channel ( ,), Power (Main)

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No Item Specification Remark
3. SETUP EZ Scan Auto Channel Search
CH. Edit CH. Add/Delete
DTV Signal Bad/Normal/Good DTV Only
Ch. Label CH. Logo
Main Input DTV/Analog/Video1/Video2/Component1/ RGB-DTV <-> RGB-PC,
Component2/RGB-DTV/DVI-DTV DVI-DTV <-> DVI-PC
Sub Input DTV/Analog/Video1/Video2
Front Display Off/On
SET ID 1 - 99
4. Video EZ Picture Off/Normal/Day Light/Night Time/
Movie/Video Game/Sports
User Control Contrast/Brightness/Color/Sharpness/Tint
XD Off/On
Color Temperature Warm/Medium/ Cool
Video Preset Factory Preset
5. Audio Audio Language English/Spanish/French DTV Only
EZ SoundRite Off/On
EZ Sound Off/Normal/Stadium/Theater/Music
User Control Balance/Treble/Bass
Front Surround Off/3D EchoSound System/SRS TruSurround XT
TV Speaker Off/On
6. Time Auto Clock Off/On/Time Zone
Manual Clock Year/Data/Time
Off Timer Off/On/Time
On Timer Off/On/Time/Ch./Vol
Sleep Timer Off/10 min/20 min/30 min/60 min/90 min/120
min/180 min/240 min
Auto Off Off/On
7. Option Aspect Ratio Set By Program/4:3/16:9/Horizon/Zoom1/
Zoom2/Cinema Zoom
Caption Off/EZ Mute/On DTV: Horizon disable
Caption Mode CC1/CC2/CC3/CC4/Text1/Text2/Text3/Text4
Caption Option Style/Size/Font/Text Color/Text Opacity/Bg
Color/Bg Opacity/Edge Type/Edge Color
Language English/Espanol/Francais
Cinema Off/On
Demo Ez Demo/XD Demo
8. Lock Lock System Off/On
Set Password New/Confirm
Block Ch. O
Movie Rating G/PG/PG-13/R/NC-17/X
TV Rating-Children Age/Fantasy Violence
TV Rating-General Age/Dialogue/Language/Sex/Violence
Aux.Block
Video1/Video2/Component1/Component2/RGB1/RGB2/DVI
9. Etc. Comb Filter 3D Comb(main), 4H Comb(sub) 3D comb for main display,
4H comb for sub display
Remocon LG code

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5. External Input Format
Component Video Input (Y, CB/PB, CR/PR)
RGB Iinput (PC/DTV)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock Proposed
1. 640x480 15.73 60.00 SDTV ,DVD 480I
2. 704x480 31.47 59.94 SDTV 480P
3. 1280x720 45.00 60.00 HDTV 720P
4. 1280x720 44.96 59.94 HDTV 720P
5. 1920x1080 33.75 60.00 HDTV 1080I
6. 1920x1080 33.72 59.94 HDTV 1080I
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock Proposed
PC DDC
7. 640*350 31.468 70.09 25.17 EGA O
8. 720*400 37.927 85.03 35.50 DOS O
9. 640*480 31.469 59.94 25.17 VESA(VGA) O
10. 640*480 37.861 72.80 31.50 VESA(VGA) O
11. 640*480 37.500 75.00 31.50 VESA(VGA) O
13. 800*600 35.156 56.25 36.00 VESA(SVGA) O
14. 800*600 37.879 60.31 40.00 VESA(SVGA) O
15. 800*600 48.077 72.18 50.00 VESA(SVGA) O
16. 800*600 46.875 75.00 49.50 VESA(SVGA) O
18. 1024*768 48.363 60.00 65.00 VESA(XGA) O
19. 1024*768 56.476 70.06 75.00 VESA(XGA) O
20. 1024*768 60.023 75.02 78.75 VESA(XGA) O
DTV
21. 704*480 31.47 59.94 SDTV 480P
22. 1280*720 45.00 60.00 HDTV 720P
23. 1280*720 44.96 59.94 HDTV 720P
24. 1920*1080 33.75 60.00 HDTV 1080I
25. 1920*1080 33.72 59.94 HDTV 1080I

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DVI Iinput (PC/DTV)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock Proposed
PC DDC
26. 640*350 31.468 70.09 25.17 EGA O
27. 720*400 37.927 85.03 35.50 DOS O
28. 640*480 31.469 59.94 25.17 VESA(VGA) O
29. 640*480 37.861 72.80 31.50 VESA(VGA) O
30. 640*480 37.500 75.00 31.50 VESA(VGA) O
37. 1024*768 48.363 60.00 65.00 VESA(XGA) O
38. 1024*768 56.476 70.06 75.00 VESA(XGA) O
39. 1024*768 60.023 75.02 78.75 VESA(XGA) O
DTV
40. 704*480 31.47 59.94 SDTV 480P
41. 1280*720 45.00 60.00 HDTV 720P
42. 1280*720 44.96 59.94 HDTV 720P
43. 1920*1080 33.75 60.00 HDTV 1080I
44. 1920*1080 33.72 59.94 HDTV 1080I
6. POWER
No Item Min Typ Max Unit Remark
1. AC Power Operating Voltage 90 264 V
2. DC Voltage, LCD Panel Drive 11.4 12.0 12.6 V
3. DC Voltage, Inverter 23.4 24.0 24.6 V
4. DC Voltage, Sound AMP 17.4 18.0 18.6 V
5. DC Voltage, Stand By 4.6 5.0 5.4 V
6. DC Voltage, Scaler(HD2) 3.1 3.3 3.5 V I/O port supply
7. DC Voltage, Scaler(HD2) 1.6 1.8 1.9 Internal core supply
8. DC Voltage, ADC 3.1 3.3 3.5 V AD9883
9. DC Voltage, VCD 5 V 4.7 5 5.3 V VPX3226
10. DC Voltage, VCD 3.3V 3.1 3.3 3.5 V
11. DC Voltage, Micom 4.7 5 5.3 V
12. DC Voltage, Tuner 4.75 5.00 5.25 V
DC Voltage, Tuner 31.5 33.0 34.5 V

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7. External Interface
- AV Input
No Item Min Typ Max Unit Remark
6. AV Audio In S/N, L/R 43.0 dB
7. AV Audio In Frequency Response, Low 80.0 Hz
8. AV Audio In Frequency Response, High 7.0 10.0 15.0 kHz
9. AV Audio In Distortion 2.0 %
10. AV Audio In Max Distortion 10.0 %
11. AV Audio In Level, L/R 0.3 0.4 0.5 Vrms
12. AV Audio In Crosstalk, L/R 40.0 dB
18. AV Audio Dynamic Range 2.00 Vpp
19. Component Video Input Level (Y, CB/PB, CR/PR) 0.6 0.7 0.8 Vpp 75 ohm (480i,480p,720p,1080i)
20. RGB/HV Input Level 0.6 0.7 0.8 Vpp 75 ohm
8. General Specifications
No Item Min Typ Max Unit Remark
1 Active Screen Size 800.4(diagonal) mm 29.53 inches
2 Outline Dimension 760.0(H)x450.0(V)x48.0(D) mm
3 Pixel Pitch 170.25 x 510.75 xRGB
4 Pixel Format 1366(H)x768(V) stripe arrangement
5 Color Depth 8bit 16.7 Mbit
6 Luminance ,White 500 (center 1 point typ) cd/m2
7 Viewing Angle (CR>10) R/L 176(Typ),U/P 176(Typ) degree
8 Power Consumption 88.7 Watt
9 Weight 7.2 kg
10 Display Operating Mode Transmissive mode ,normally black
11 Surface Treatment Hard coating (3H)
12 Altitude Operating 0 - 14,000 feet 4,267.2 m
Storage/Shipment 0 - 40,000 feet 12,192.0 m

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9. Electro Optical Characteristic Specifications
No Item Min Typ Max Unit Remark
1 Contrast Ratio 350 500 C It measured at center point
2 Surface Luminance, White 400 500 Cd/m2Full white
3 Luminance Variation 1.3
4 Response Time Tr (Rising time) 8 12 msec
5 Color coordinate RED X 0.640 Full Pattern
Y 0.343
GREEN X Typ 0.275 Typ
Y -0.03 0.605 +0.03
BLUE X 0.145
Y 0.065
WHITE X 0.284
Y 0.295
6 Viewing Angle X axis right( =0) 85 88 degree
(CR>10) X axis left( =180) 85 88
Yaxis up ( =90) 85 88
Z axis down( =270) 85 88
10. Mechanical specification
No Item Content Remark
1Product Width (W) Length (D) Height (H)
Dimension 874 109 538
874 186 580.5 With Stand
2 Product Weight 24.1Kg

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1. Application Object
This instruction is for the application to the LCD TV.
2. Designation.
2.1 As this chassis is a non-charging type of chassis for
insulation of the power supply part, it may not use an
insulation type of transformer but it is better to adjust
after operating an insulation type of transformer
between the power supply line and the input side of
chassis.
2.2 Adjustment must be done according to accurate order.
However, order may be changed considering mass
production.
2.3 Adjustment must be done in environment of ambient
temperature of 25 5°C, RH 65 10% unless
specially designated.
2.4 For adjustment, input voltage of the receiver must be
maintained at 110V, 60Hz.
2.5 The receiver must be maintained in preliminary
operation status for about 15 minutes before
adjustment unless specially designated.
Perform preliminary operation after receiving
100% White Pattern (06CH).
(Or 3. White Pattern status of Ex-Adjust)
White Pattern entry method
A) Enter into Ez-Adjust by pressing the ADJ key on
the adjustment R/C.
B)100% FULL WHITE PATTERN appears if
pressing the OK ( ) key after selecting the
3.WHITE PATTERN with the CH + / - KEY.
* It is possible to heat run the set without a
separate signal generator in this mode.
Caution : Care must be taken as afterimage
phenomena may occur about the black level
part of screen If leaving pause image turned on
for more than 20 minutes (especially inner digital
pattern (13 CH), Cross Hatch Pattern (09CH)
with significant black/white contrast).
3. Total Adjustment
3.1 EDID (Extended Display Identification Data ) / DDC
(Display Data Channel) download
3.1.1 Summary
: This function was created by VESA and is intended to
realize "Plug and Play" that the computer automatically
communicates with the monitor through mutual change
of information and re-configure user environment so
than the user can immediately use the computer
without providing direct command to the PC or
monitor.
3.2 AD9883A-Set Adjustment
3.2.1 Summary
: The AD9883A-Set Adjust is function that the A/D
converter automatically sets up optimum blacklevel
and gain and compensate RGB deviation.
- DVI EDID Data
- RGB EDID Data
ADJUSTMENT INSTRUCTION
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 4F 3B C0 45 40 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 4B 1E 3E 08 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 33 32 4C 50 31 44 43 20 20 20 20 20 20 00 BE
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 4F 3B C0 45 40 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 4B 43 44 20 20 20 20 20 20 0A 00 00 00 FD 00 38
60 4B 1E 3E 08 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 33 32 4C 50 31 44 43 20 20 20 20 20 20 00 3E

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3.2.2 Adjustment Method
A)Enter the 100% Vertical Color Bar Pattern
(TVBAR_100) of the 720P Mode supported for entry
of component and select entry selection to
Component1 or Component2 and then select image
to 'Normal'.
B) After waiting for more than a second after receipt of
signal, enter into 'Ez?Adjust' by pressing the ADJ Key
on the Adjustment R/C. Adjustment is automatically
done if pressing the (+) key after selecting the '1.
AD9883A-Set'.
C) If adjustment is normally completed, 'AD9883£≠Set'
message is displayed, and if not normally completed,
'AD9883A Setup Error' message is displayed.
D) If adjustment is completed, exit the adjustment mode
by pressing the ADJ key.
3.3 Color adjustment of main/subsidiary part
Color adjustment of main/subsidiary part is intended to
reduce color difference of the main/subsidiary part in the
PIP/POP/SPLIT Screen.
A) After entering inner signal, enter into the 'Ez?Adjust'
by pressing the ADJ key of the remote control for
adjustment and select the '2.VPX3226' and enter into
the Adjustment Mode by pressing the right key ( ).
B) The screen automatically becomes a TV 6CH SPLIT
Screen if entering into the Adjustment and a window
appears as below.
< Screen Adjustment Command Table. (RS-232) >
C) Firstly adjust '1.Contrast (Main)' so that figure of "US
6CH" character of the left main screen is shown
mostly clearly and vividly (so that saturation is not
done) and set the '2.Contrast(Sub)' to same value. In
this case, adjust it by using the volume +/- key.
D) If adjustment is completed, exit the Adjustment Mode
by pressing the ADJ key.
<Adjustment Pattern : 720P Vertical Color Bar>
VPX3226
1. Contrast(MAIN) 31
2. Contrast(Sub) 31
US 6CH US 6CH

- 14 -
SVC REMOCON
NO KEY FUNTION REAMARK
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

- 15 -
TROUBLESHOOTING
No power
Connector connection
Replace Power_board
Replace Power_boardPower On key
OK
Power supply Check
connector connection status.
Stand voltage check:
D-board P810 '+5V-STDBY
Stand voltage check:
A-board P818 #5Pin 5V
Check 15V or 5V
of Lips
Connection
of power supply part :
Check wiring status of the 13-pin
connector
Connection
of power supply part :
Check wiring status of the 15-pin
connector
Power on signal level :
D-board P811 'power0' 3.3V
D_board main voltage:
P810 '+3.3V', '+6V-P',
'12V-P', '+30V-P'
Fail
Fail
Fail
Fail Fail
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Replace Power_board
Replace D_board
MICOM IC803

- 16 -
No Raster
Replace Power board
Stand by voltage :
D_board P810 +12V-P Check No Power (Go to Power)
Fail
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Replace IC480/Q411
Replace D_board
Stand by voltage :
D_board IC480
#5, #6, #7, #8 12V
D_Board P412
LVDS Signal Exist?
Check No Power
(Go to Power)
Fail
Fail
Fail
Fail
Replace D_board
Replace A_board
A_board P817 #13
15V Check No Power (Go to Power)
Check
Module T-con voltage:
D-board P412 #2, #3, #4pin
12V? Replace LCD Module

- 17 -
No Sound
Replace Connector
Replace Power Board
Replace A_Board
Replace Speaker
Check Sound supply:
A_board P817 #1, #2 18V Power board 15Pin
Connector
check
Fail
Fail
Fail
Pass
Pass
Pass
Speaker output check :
Is there waveform of P601 #1?

BLOCK DIAGRAM(MAIN)
- 18 -
10
LG
HD-ll
LGDT1102
EPLD1
(XC95144XL)
VCXO
27Mhz CLK Syn.
(LGDPLL )
2V/Y, C
2
RGB-PC 5RGBHV
2
YC
1.8V
Reg.
Video
Decoder
(VPX3226E)
X-tal
(20.25M
)
MUX
(MC14053)
HV H,V,CLP
HV
LPF
(8M)
LPF
(8M)
Active
LPF
(AF9397)
HV
ADC
(AD9883A)
n480i
PC_IN
FID
CPU
TP[0:7],
TP_CLK,
TP_valid
Data[0:7],
CLK
SEL_VSB/1394,
SEL_TP
CPU
EPLD1
[MUX,
3-state]
9
3
LPF
LPF
HV_PC HV_pol
OR1
YCbCr
24
OR2
H,V, CLK
3
YCbCr
16H,V,CLK
3FID
OR1 OR2 OR3
TP/D1
9
YCbCr
24H,V,CLK
3FID
RC
Filter VDPClk
(74.25M)
SysClk
FR_60
NT2Clk
(27M)
EPLD
CPU
(S3C44B0X)
2
CPU
X-tal
(10M
)
I2C ctrl
(PCF8584)
RS-232C
(ST3232)
I2C Hub
(PCA9516)
EEPROM
(AT24C25
6)
IIC1 IIC2 IIC3 IIC4
IIC3
IIC4
OR4
Wired-
OR
OR4
IIC2
KA75270
74HC14
Reset
Addr0,
WBE0,OE, CS
Addr.[1:12],
WR,CS,STRB,
DACK,CLK,
Reset
Data[0:7]
Rx,Tx
Data[0:31]
SDRAM
(HY57V651620B
)
SDRAM
(HY57V641620B
])
Addr.[2:13,22:23],
CLK,CKE,CS,WE,
CAS,RAS,DQM[0:3]
Data[0:31]
FLASH
(29LV160B)
FLASH
(AT49LV16 0)
Addr.[2:21],
CS,WE,OE,
FlashDown
RDY,
DREQ,
IRQ
EN[0:3] IRQ
Video
Decoder
(VPX3226E)
X-tal
(20.25M
)
IIC2
3D-Comb
Filter
LVDS Tx (THC63L
VDM83R)
TX[0:2]–, TXC–
8
RGB
HV
24
2
DOutClk
HD-II HD-II HD-II
Jepico
HV
RGB
24
3 2
YPbPr
Jepico
RGB out
test
V,YC
3MNT_
Out
Jepico
DOutClk
9Data[0:7],
CLK
HD-II
VAL ID
IIC4
3YCbCr
SDRAM
(HY57V643220C)
SDRAM
(HY57V641620B)
x4
Rear AV V,L R
3
Front AV V,L R
3
Rear S YC
2
Front S YC
2
A/V SW
(CXA2069)
Comp_1 YCbCr
3
Comp_2 YCbCr
3
MSP4440
Video SW
(CXA2181)
Ext A LR
2
IIC2
OR3
Sound
Proc
(MSP4440)
I2S
2
SIF
MNT_Out LR
2
LR 2
CXA2069
IIC4
I2S
Out
3HD-II
HD-II
I2S_In
SPDIF Rev.
(CS8415A)
MUX
(74157)
MUX
(74157) SPDIF Out
SPDIF In(DVI)
SPDIF
In(DVD)
IIC3
CPU
Sel_HD2
Sel_DVD
CPU
SPDIF In
SPDIF Out
uCom
(M306H3)
IIC4
Reset
Reset
TMDS Rx
(HDCP)
Sil169
BSS83
BSS83
8
2
RX[0:2]–, RXC–
DDC(I2C)
RGB
H,V, CLK
3
24 OR1
OR2
EEPROM(AT24C02) CPU
PD
I2C Ext.
(82B715)
Reset
EPLD1
(XC95144XL
)
EPLD_JTAG
I2C_Hub
[0:1]
Reset
Error,Emph
4
IN2
IN3
IN4
IN1
OUT2
OUT1
OUT1
TV
IN2
IN3 IN4 IN1 IN2
IN4
IN5
HD2_EXT
HD2_CHA
SDRAM I/F
Host I/F
Video Out
PWM, Clock
Comp_1 LR
2
Comp_2 LR
2
RGB1 LR
2
NTSC
Tuner
LPF
(8M)
LPF
(8M)
1VMNT_Out
AT/NTNTSC
V
IIC1 IIC2
ATSC/NTSCTuner
(TDVB-H751P) AVSB
(LGDT3102)
RF
Jack
OSC
(25M
)
2.5V
Reg.
IF_AGC
2nd IF±(6M)
SIF MSP
4440
Tuner B/D
PWM
modulator
(NSP6241B)
Digital
amp.
(TA5122)
Audio
ADC
(CS5331)
LR
Jepico
RGB
HV
24
2
DOutClk
FPGA
[Decryption
]
Config Dev.
[EEPROM]
10
Serial
Interface
10
TP[0:7],
TP_CLK,
TP_valid
IIC2
IN1
RGB-IP 5RGBHV
CM0528
Switch
RGB2 LR
2

BLOCK DIAGRAM DESCRIPTION(MAIN)
- 19 -
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
thesame 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 (CXA2181) is an IC that outputs video signals selectively. The selected one is outputted through ADC
(AD9883A) as a digital signal. uCom (M306H3) 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 (Sil169) 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.
Decryption FPGA(Cyclone EP1C12F256C8) can decrypt the encrypted TP(Digital Tuner stream) to normal TP(non
encrypted stream).

- 20 -
BLOCK DIAGRAM(POWER)
INPUT
AC
100~240V
LINE FILTER
X-CAP
Y-CAP
MAIN
TRANS
FORMER
EPC5050
PFC
TRANS
EER3124
ST-BY
TRANS
EED1916
PFC
CONTROL
FEED BACK
FEED BACK
ST-5.0V
PROTECTOR DETECTOR
FEED BACK
MAIN CONTROL
ST-BY CONTROL
RECTIFIER & FILTER RECTIFIER & FILTER
BRIDGE
RECTIFIER INVERTER
24V
PWR-CTL
ACTIVE HIGH
MAIN
18V 12V 33V
MAIN
3.4V 6.0V
DC/DC
CONVERTER