LG 23LC1RB-TB User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : ML-041G
MODEL : 23LC1RB-TB
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION........................................................................................7
ADJUSTMENT INSTRUCTION................................................................11
SVC REMOCON ......................................................................................13
TROUBLE SHOOTING............................................................................14
BLOCK DIAGRAM...................................................................................19
WIRING DIAGRAM..................................................................................21
EXPLODED VIEW .................................................................................. 22
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
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩand 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF

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CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conflict between the
following servicing precautions and any of the safety precautions on
page 3 of this publication, always follow the safety precautions.
Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug or
other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Test high voltage only by measuring it with an appropriate high
voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specified otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10% (by volume) Acetone and 90% (by
volume) isopropyl alcohol (90%-99% strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual, lubrication of
contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks are
correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test fixtures specified in this
service manual.
CAUTION: Do not connect the test fixture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily
by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques
should be used to help reduce the incidence of component
damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist strap device, which should be removed to
prevent potential shock reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES
devices.
4. Use only an anti-static type solder removal device. Some solder
removal devices not classified as "anti-static" can generate
electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum foil
or comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be
installed.
CAUTION: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Otherwise harmless motion such as
the brushing together of your clothes fabric or the lifting of your
foot from a carpeted floor can generate static electricity
sufficient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropriate
tip size and shape that will maintain tip temperature within the
range or 500oF to 600oF.
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.
(500oF to 600oF)
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
(500oF to 600oF)
b. First, hold the soldering iron tip and solder the strand against
the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder flows onto and around both the
component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.
SERVICING PRECAUTIONS

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IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently
prying up on the lead with the soldering iron tip as the solder
melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing the
IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close as
possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining
on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as
possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and if
necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever
this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC
connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the good
copper pattern. Solder the overlapped area and clip off any
excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly
connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.

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SPECIFICATION
1. Application range
This specification is applied to ML-041G chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below
condition.
(1) Temperature: 25°C ± 2°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
30min.
(5) Adjusting standard for this chassis is followed a special
standard.
3.General Specification
NOTE : Specifications and others are subject to change without notice for improvement .
LCD Module Feature Type TFT Color LCD Module
Active Display Area 22.95inch(582.96mm) diagonal
Pixel Pitch[mm] 0.124mm(H) x 0.372mm(V) x RGB
Electrical Interface TFT
Color Depth 8bit, 16,7M color
Size[mm] 546(H) x 318.3(V)x42.1(D) LPL
Surface Treatment Hard Coating(3H), Anti-glare treatment of the front polarizer
Operating Mode Normally Black
Back light Unit 6CCFL(6 lamps)
R/T Typ 17ms(R.T. : 8ms + F.T. : 9ms)

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4. Reference table - Function
5. Mechanical specification
No Item Specification Remark
1 Tele text TOP, FLOF,LIST 10 page Pal(option)
2 REMOCON NEC Code PAL/ NTSC
3 AV Input 2 Rear & Side : MB/TB
1 Rear : ZB
4 S-Video Input 1 Rear
5 Component input 1 Rear : NTSC, Side : PAL
6 PERI TV Connector Full SCART : 1 Rear (option : EU)
7 Ear-phone output 1
8 RS-232 1 Only Commercial Model
9 Discrete IR 1 Only Commercial Model
10 2 Carrier Stereo BG, DK
11 NICAM Stereo BG, I, LL'
12 2 Carrier Dual BG, DK
13 NICAM Dual BG, I, LL'
14 DW(Double Window) Mode X
15 MW(Multi Window) Mode X
16 Film Mode X
17 Noise Reduction X
18 Progressive Scan O
19 Motion Detection X
20 SRS WOW X
21 Swivel Speaker X
22 EZ-pip X
23 ARC O
24 DRP X
25 DCDI X
26 HDCP X
No Item Content Remark
1 Product Width (W) Length (D) Height (H)
Dimension Before Packing 611.6 275.6 485.2
After Packing 704 660 233
2 Product Only SET 10.9 kg
Weight With BOX 14.2kg

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6. Outgoing Condition
No Item Condition Remark
1 Power Off
2 Volume Level 30
3 Main Picture Input TV
5 Main Last Channel Pr 01
8 Mute Off
9 ARC 16:9
10 Station Auto Program
Manual Program
Program Edit
Favorite Program None
11 Picture PSM Dynamic
Dynamic Contrast 85
Brightness 60
Colour 70
Sharpness 70
Tint 0 NTSC OPTION
12 Sound SSM Flat
AVL Off
Balance 0
13 Time Time -- : --
Off Time -- : -- off
On Time -- : -- Off
Auto Time Off
14 Setup Language English(Area Management)
Input TV
Child Lock Off
Power Indicator On
15 PC H-Position Variable by each mode
V-Position
Clock
Phase
Auto Configue

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8. Optical Character(LCD Module)
7. Engineering Specification
No. ITEM Specification Remark
1 ENERGE POWER CONSUMPTION LED COLOR
Normal ≤120W Blue
Stand By, ≤1W Amber
DPM mode (PC H/V-sync on/off) ≤30W Blue
ITEM Specification Remark
2 D-SUB 1 : RED 2 : Green
Pin configuration 3 : Blue 4 : ID2 (GND)
5 : S.T (GND) 6 : RED GND
7 : Green GND 8 : Blue GND
9 : N.C 10: D-GND
11: ID0(GND) 12:SDA
13: H-Sync 14: V-Sync
15: SCL Shell: GND
3 Control Function 1) Contrast/Brightness
2) H-Position / V-Position
3) Tracking : Clock / Phase
4) Auto Configure
RESET
4 Component Jack 1 : Y MB/TB rear
3 : Pb ZB side
5 : Pr
5 D2 Jack 1 : Y 2 : Y GND JAPAN Only
(525i, 525p) 3 : Pb 4 : Pb GND
5 : Pr 6 : Pr GND
7 : Line1 Ready 8 : LINE1
9 : LINE2 10:Line2 Ready
11: LINE3 12:SWITCH GND
13: Line3 Ready 14: SWITCH
No Item Specification Remark
LPL
1 Viewing Angle R/L 178 / 178 Typical(min:176)
<CR≥10> U/D 178 / 178
2 Luminance Luminance (cd/m2) 450 Typical(min:350)
Variation 1.6 MAX
3 Contrast Ratio Contrast Ratio(CR) 600 All white / All black
4 CIE Color Coordinates White Xw Typ. 0.272
Yr Typ. 0.278
RED Xr Typ. 0.637
Yr Typ. 0.337
Green Xg Typ. 0.276
Yg Typ. 0.605
Blue Xb Typ. 0.146
Yb Typ. 0.062

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No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
1. 720x480 15.73 60 SDTV, DVD 480i ZB, TB, MB
2 720x480 15.63 59.94 SDTV, DVD 480i ZB, TB, MB
3 720x480 31.47 59.94 EDTV 480p TB, MB
4 720x576 15.625 50.00 SDTV, DVD 576i ZB, TB
5 720x576 31.25 50.00 HDTV 576p TB
6 1280x720 45.00 60.00 HDTV 720p TB, MB
7 1280x720 44.96 59.94 HDTV 720p TB, MB
8 1920x1080 31.25 50.00 HDTV 1080i 50Hz (Only AU) TB
9 1920x1080 33.75 60.00 HDTV 1080i 60Hz (ATSC) TB, MB
10 1920x1080 33.72 59.94 HDTV 1080i 59.94Hz TB, MB
9. Component Video Input(Y, PB, PR)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
Analog RGB, Digital RGB
1 640x480 31.469 59.94 25.17 VESA(VGA)
2 800x600 37.879 60.31 40.00 VESA(SVGA)
3 1024x768 48.363 60.00 65.00 VESA(XGA)
4 1280x768 47.693 60.00 80.125 VESA(WXGA)
5 1360x768 47.649 59.936 84.625 VESA(WXGA)
10. PC INPUT Mode table

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1. Application Object
This document is applied to 23" Wide LCD TV which is
manufactured in Monitor Factory or is produced on the basis
of this data.
2. Designation
2.1. The adjustment is according to the order which is
designated and which must be followed, according to the
plan which can be changed only on agreeing.
2.2. Power Adjustment: Free Voltage
2.3. Magnetic Field Condition: Nil.
2.4. Input signal Unit: Product Specification Standard
2.5. Reserve after operation: Above 30 Minutes
2.6. Adjustment equipments: Pattern Generator (801GF,
MSPG925F), DDC Adjustment Jig equipment
3. Adjustment
3.1 Auto Gain/Offset Adjustment
3.1.1 PC Mode Adjustment
3.1.1.1 Adjustment preparation
Execution of RF no signal during Heat Run over 30min
15 Pin D-Sub Jack of LCD TV is connected to the
signal of Pattern Generator.(MSPG-925 serise)
3.1.1.2 Auto Gain/Offset Adjustment
Convert to PC Mode in Input-Mode
Select MODEL: 37(1024x768) in Pattern Generator
Select PATTERN:12(16 Step Gray signal) in Pattern
Generator (MSPG-925 SERISE)
Press IN-START Key by using the Remote
Controller(SVC), after converting to Adjustment-Mode,
press VOL+ Key consecutively in AutoGain Menu.
After adjustment is complete, pressing enter key,
stores and completes the process
3.2.2 Component Mode Adjustment
3.2.2.1 Adjustment Preparation
Execution of RF no signal during Heat Run over 30min
The component jack(Y,Pb,Pr) of LCD TV is connected
to Y, Pb, Pr Output Signal of Pattern Generator
(MSPG-925 SERISE)
3.2.2.2 Auto Gain/Offset Adjustment
Convert to Component Mode in Input-Mode.
Select MODEL: 228(480p Mode, Y : 100%, Pb/Pr :
75%) in Pattern Generator
Select PATTERN : 33 (Color Bar Pattern signal) in
Pattern Generator (MSPG-925 SERISE)
Press IN-START Key by using the Remote
Controller(SVC) , after converting to Adjustment-Mode,
press VOL+ Key consecutively in AutoGain Menu.
After adjustment is complete, pressing enter key,
stores and completes the process
3.2 EDID (The Extended Display Identification
Data) Adjustment
Connect 15 Pin D-Sub Cable to D-Sub Jack
Set up the input mode of the SET to PC
For the DDC connect an automation equipment and data
is written on DDC.
(Refer to Working Order for relative setting up)
3.2.1 EDID DATA
ADJUSTMENT INSTRUCTION
No Item Min Typ Max Unit Remark
1. White Balance, 0.272 0.287 0.302 MB/TB ±0.015(95% white
X axis Video or comp1 mode)
2. White Balance, 0.274 0.289 0.304 MB/TB ±0.015 (95%white
Y axis Video or comp1 mode)
3. White Balance, 0.268 0.283 0.298 ZB ±0.015 (95%white
X axis AV1 or comp mode)
4. White Balance, 0.283 0.298 0.313 ZB ±0.015 (95%white
Y axis AV1 or comp mode)
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 17 56 01 01 01 01
10 00 0F 01 03 01 40 26 78 08 B1 DA A1 56 48 98 24
20 13 48 4B A1 08 00 31 40 01 01 01 01 45 40 01 01
30 61 40 81 80 01 01 4E 1F 00 90 51 00 1B 30 40 88
40 13 00 A2 0B 32 00 00 18 1B 21 50 A0 51 00 1E 30
50 48 88 35 00 A2 0B 32 00 00 1C 00 00 00 FD 00 3B
60 3D 1F 30 09 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 32 33 4C 43 31 52 20 20 20 20 20 20 20 00 7B

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OPTION DATA SETTING(PAL)
No Item Condition Remark
Option1
1 Side AV No No : Side AV Off
Yes : Side AV On
2 Scart Yes No : Component input
Yes : Scart input
3 PC Yes No : PC Off
Yes : PC On
4 SideComp No For ML-041G Chassis
5 16:9 Yes No : ARC Off
Yes : ARC On
6 200PR No No : 100 Program
Yes : 200 Program
7 Text Yes No : Text Off
Yes : Text On
8 ACMS Yes No : ACMS Off
Yes : ACMS On
Option2
1 HiDev No No : Hi_Deviation Off
Yes : Hi_Deviation On
2 Hotel No No : Hotel Mode Off
Yes : Hotel Mode On
(*Refer to Comment1)
3 Top Yes No : TOP Off
Yes : TOP On
4 I II Save No No : I II Save Off
Yes : I II Save On
5 Turbo Vol No No : Turbo Volume Off
Yes : Turbo Volume On
6
China/Australia No No : Except below area
Yes : China, Australia
Option3
1 Language 0 0:ENGLISH ONLY
1: English/German/French/Italian/
Spanish/ Dutch/Swedish/Norwegian/
Danish/Finnish/Portuguese/Rumanian/
Polish/Hungarian/Czech/Russian
2: English/German/French/Italian/
Spanish/ Dutch/Swedish/Norwegian/
Danish/Finnish/Portuguese/Rumanian/
Polish/Hungarian/Czech/Russian
3:English/Chinese
4:English/Franch/Arab
5:English/Parsi
2 Txt Lang 0 0 : WEST EU
1 : EAST EU1
2 : TURKY EU
3 : EAST EU2
4 : CYRILLIC1
5 : CYRILLIC2
6 : CYRILLIC3
7 : TURK GRE1
8 : TURK GRE2
9 : TURK GRE3
10 :ARAB FRAN
11 :ARAB ENG
12 :ARAB HEB1
13 :ARAB HEB2
14 :FARSI ENG
15 :FARSI FRA
16 :FARI ALL
3 Inch opt 1 1 : 15 inch
2 : 17 inch
3 : 20 inch
4 Panel 0 0 : VGA CMO
1: VGA LPL
2: VGA AUO
3: SVGA AUO
4: XGA LPL
5: XGA CMO
6: XGA HYD
7: WXGA LPL
8: WXGA AUO

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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

- 14 -
TROUBLESHOOTING
No power
(LED indicator off)
Check short of main B/D
or Change Lips
Change IC604, IC607
Change LED Assy
Check 15V or 5V
of Lips
Check Output of
IC604, IC607
Check LED Assy
Check P701 Connector
Fail
Fail
Pass
Fail
Pass
Pass
Pass
:[A]Process

- 15 -
No Raster
Check LED Status
on display unit
Check the input/
Output of IC300
Check
L300, L301, L302
Check inverter
Connector or inverter
Check input source cable and jack
Repeat A PROCESS
Fail
Change
L300, L301, L302
Fail
Change IC300
Fail
Change inverter
connector or inverter
Fail
Change panel link
cable or module
Fail
Change module
Fail
Check panel link
Cable or module
Pass
Pass
Pass
Pass
:[B]Process

- 16 -
No Raster on Component signal
Check P5103 or
RCA CABLE
Check the signal of
R165, R174, R179
Repeat
[A] Process
Check the input/
output of IC100
Check the input/
output of IC300
Check input source cable and jack
Fail
Re-soldering or
Change the defect part,
Check X100
Fail
Re-soldering or
Change the defect part,
Check X300
Fail
Pass
Pass
Pass
Check the input/output
of IC200 Re-soldering or
Change the defect part
Fail
Pass

- 17 -
No Raster on AV Signal
(Video, S-Video) No Raster on TV(RF) signal
Change
L704, L712, L713, L714
Check the signal of
L704, L712, L713, L714
Repeat
[A] Process Check the output of
TU1000
Check the input/output
of IC100
Check input source cable and jack
Fail
Fail Fail
Fail
Re-soldering or
Change the defect part
Chek X100
Check 5V, 33V of TU1000
Re-soldering or
Change the defect part
Pass
Pass
Check the input/output
of IC300 Fail
Re-soldering or
Change the defect part
Check X300
Pass
Pass

- 18 -
No Sound
Check the speaker wire
Change source input
Check the
input source Fail
Pass
Re-soldering
Check the input/output
of IC801 Fail
Pass
Re-soldering or
Change the defect part
Check X100
Check the input/output
of IC100 Fail
Pass
Re-soldering or
Change the defect part
Check the input/output
of IC400 Fail
Pass
Change speaker
Check the speaker Fail
Pass

- 19 -
BLOCK DIAGRAM

- 20 -
BLOCK DIAGRAM DESCRIPTION
1. Video Controller Unit & Display Data Conversion Unit
The video controller unit receives the video signals inputted through the tuner, AV port (AV1, AV2, S-VIDEO,
COMPONENT), and converts them into an analog RGB signal through the microcomputer (VCTI) combined
with the video decoder that integrates various functions in one chip.
Either the analog RGB, component YPbPr or PC RGB signal is selected by the switching IC and inputted to a
scaler (GM2221), which is sent to the LCD module after being modified to an LVDS signal through the
integrated LCD module as a TTL output.
VCTi is the main microprocessor that handles video signal processing and sound signal processing.
It also manages the RF signals received from the tuner.
The scaler can control timing to fit into the LCD panel, and can also control the size and position of the input
signal.
2. Power Supply Unit
The power supply unit provides 15V and 5V DC power to the mainboard.
The PWM Step-Up DC/DC Converter circuit is used to generate the 33V used for the tuner.
15V power is directly used by the sound amp IC and is also generate 12V and 5V power through the regulator.
12V power is used for the LCD panel power, and 5V power is converted to 3.3V and 1.8V power through the
regulator, which in turn supplies electrical power for ICs such as VCTI and scaler.