LG 23LX1RV-MC User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : ML-041D
MODEL : 23LX1RV-MC
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 ...............................................................10
TROUBLE SHOOTING............................................................................13
BLOCK DIAGRAM...................................................................................19
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.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩand 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF

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CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conflict between the
following servicing precautions and any of the safety precautions on
page 3 of this publication, always follow the safety precautions.
Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug or
other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Test high voltage only by measuring it with an appropriate high
voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specified otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10% (by volume) Acetone and 90% (by
volume) isopropyl alcohol (90%-99% strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual, lubrication of
contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks are
correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test fixtures specified in this
service manual.
CAUTION: Do not connect the test fixture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily
by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques
should be used to help reduce the incidence of component
damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist strap device, which should be removed to
prevent potential shock reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES
devices.
4. Use only an anti-static type solder removal device. Some solder
removal devices not classified as "anti-static" can generate
electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum foil
or comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be
installed.
CAUTION: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Otherwise harmless motion such as
the brushing together of your clothes fabric or the lifting of your
foot from a carpeted floor can generate static electricity
sufficient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropriate
tip size and shape that will maintain tip temperature within the
range or 500 F to 600 F.
2. Use an appropriate gauge of RMA resin-core solder composed
of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall wire-
bristle (0.5 inch, or 1.25cm) brush with a metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature.
(500 F to 600 F)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suction-
type solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the
circuitboard printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
(500 F to 600 F)
b. First, hold the soldering iron tip and solder the strand against
the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder flows onto and around both the
component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.
SERVICING PRECAUTIONS

- 5 -
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-041D 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.
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
3.General Specification(TV)
1
2
3
4
5
6
7
8
9
Video input applicable system
Receivable broadcasting system
RF input channel
Input voltage
Picture size
Tuning system
Operting environment
Storage environment
Display
1)PAL-D/K,B/G,I
2)NTSC-M
3)SECAM NTSC 4.43’
1)PAL/SECAM BG
2)PAL/SECAM DK
3)PAL I/I
4)SECAM L/L’
5)NTSC M
6)PAL-N/M
7)NTSC M
VHF : E2 ~ E12
UHF : E21 ~ E69
CATV : S1 ~ S20
HYPER : S21 ~ S41
L/L’ : B,C,D
VHF : 2 ~ 13
UHF : 14 ~ 69
CATV : 1 ~ 125
VHF Low : 1~M10
VHF High : 4~S22
UHF : S23~62
AC 100 - 240V/ 50Hz,60HZ
583mm
FVS 100 program
FS
1)Temp : 0 ~ 40 deg
2)Humidity : 85%
3)Temp : -20 ~ 60 deg
4)Humidity : 85%
LCD Module
Item Specification Remark
No.
South America Market
Except South America NTSC Market
(RM)
PAL
FRANCE
NTSC
JAPAN
23”
PAL, 200PR.(Option)
NTSC

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5.General Specification(Monitor)
1
2
3
4
5
6
Panel
Frequency range
Control function
Component Jack
D4 Jack
(525i,525p,750p,1125i)
Power ON
Stand by
DPMS Mode
Power off
LCD Module
23” TFT WXGA LCD
H:31 ~ 61KHz, V: 56 ~ 75Hz
1) Contrast/ Brightness
2) H- Position/ V-Position
3) Tracking : Clock/Phase
4) Auto Configure
5) Reset
1: Y
3: Pb
5: Pr
7: Line1 Ready
9: LINE2
11: LINE3
13: Line3 Ready
2: Y GND
4: Pb GND
6: Pr GND
8: LINE1
10: Line2 Ready
12: SWITCH GND
14: SWITCH
1366 horiz. By 768 vert. pixels
RGB strip arrangement
Hard coating(3H), Anti-glare
treatment of the front polarizer
Item Specification RemarkUnit
No.
DVI-I input
Middle east
/NTSC Only
Japan only
LED
Green
Red
Green
*.
(H) x (V) x (D)
H/V-Sync
ON/ON
OFF/ON
ON/OFF
-
Video
Active
OFF
OFF
-
LPL
LPL
Power consumption
≤Max 170
≤3.0
≤typ.35
-
W
W
W
W
mm
mm
Type
Size
Pixel Pitch
Pixel Format
Coating
Back Light
559.8 x 333.8x45.7
0.372 x 0.124 x RGB
LPL EEFL

- 8 -
7.Feature and Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Teletext
REMOCON
AV input
S-AV input
Component input
PERI TV connector
PERI TV connector
RGB input
RS-232
Discrete IR
D-sub audio input
2 Carrier stereo
NICAM stereo
2 Carrier dual
NICAM dual
DW(Double Window) mode
MW(Multi Window) mode
Film mode
Noise reduction
Progressive scan
Motion detection
SRS WOW
Swivel Speaker
EZ-pip
Local Key
Local key(DVD)
TOP, FLOF
NEC code
1
1
2
Half SCART: 1
Full SCART: 1
1
1
1
1
BG,DK
BG,I,LL’
BG,DK
BG,I,LL’
X
X
O
X
O
O
X
X
X
Pr+/-, vol+/-, ok, menu, tv/av, power
OPEN/CLOSE, PALY, STOP, SKIP/SCEN
Item Specification Remark
No.
Top(option)
PAL/NTSC
Rear(RT/RM)
Side
Side, Rear(RT/RM)
Rear(RZ)
Rear(RZ)
DVI
D-Sub 9 pin(RM)
(RM)
Stereo
6.Optical Feature(LCD Module)
Item RemarkSpecification
Viewing Angle
<CR 10>
Luminance
Contrast Ratio
CIE Color Coordinates
Typical
MAX/MIN
ALL white/All back
LPL
R/L, U/D
Luminance(cd/ )
Variation
LPL
176,176
450
1.3
500
0.284
0.295 0.285 0.293 0.289 0.303
WHITE
RED
Green
Blue
WX
WY
Wr
Yr
Xg
Yg
Xb
Yb
Typ.
Typ.
Typ.
Typ.
Typ.
Typ.
Typ.
Typ.
No.
1
2
3
4

- 9 -
NO
1
2
3
4
5
6
7
8
9
10
Resoluton
640 x 480
640 x 480
704 x 480
720 x 576
720 x 576
1280 x 720
1280 x 720
1920 x 1080
1920 x 1080
1920 x 1080
H-freq(kHz)
15.73
15.63
31.47
15.625
31.25
45.00
44.96
31.25
33.75
33.72
V-freqHz)
60.00
59.94
59.94
50.00
50.00
60.00
59.94
50.00
60.00
59.94
Proposed
RZ, RT, RM
RZ, RT, RM
RT, RM
RZ, RT, RM
RT, RM
RT, RM
RT, RM
RT, RM
RT, RM
RT, RM
Pixel clock
SDTV. DVD 480i
SDTV. DVD 480i
EDTV 480p
SDTV. DVD 625 Line
HDTV 576p
HDTV 720p
HDTV 720p
HDTV 1080i 50Hz(For Australia)
HDTV 1080i 60Hz(ATSC)
HDTV 1080i 59.94Hz
NO
1
2
3
4
5
6
7
Resoluton
640 x 480
800 x 600
1024 x 768
1280 x 768
1360 x 768
1920 x 1080
1280 x 720
H-freq(kHz)
31.469
37.879
48.363
47.693
47.649
33.75
45.00
V-freq(Hz)
59.94
60.31
60.00
60.00
59.93
60.00
60.00
Proposed
VESA(VGA)
VESA(SVGA)
VESA(XGA)
VESA(WXGA)
VESA(WXGA)
HDCP DVI Digital 1080i(RM Only)
HDCP DVI Digital 720p(RM Only)
Pixel clock(MHz)
25.17
40.00
65.00
80.125
84.625
86.375
74.375
8.Component Video Input(Y, PB, PR)
9.PC Input Mode
DVI-PC, Analog RGB, Digital RGB

- 10 -
1. Application Object
This instruction is for the application to the LCD TV.
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 2 hours
2.6 Adjustment equipments : Pattern Generator(801GF,
MSPG925F), DDC Adjustment Jig equipment HDCP
Adjustment Jig equipment.
3. Adjustments
3.1 Adjustment Details
: The machine can be adjusted by itself automatically with
factory automatic equipment, in case error occurs, set
manual adjustment to standard.
3.2 Adjustment signal Composition of The Auto Adjustment
equipment
3.2.1 RS-232C Interchange
9600bps, Pin#2 : Rx, Pin#3 : Tx, 8bit, STOP bit=1, No
Parity
3.2.2 Adjust data save
* Save the adjusted data to the EEPROM with default
value
3.2.3 Adjust OK
3.2.4 Screen Adjustment Instruction Forms
CMD1 CMD2 SetID(0) Value
a. CMD1,CMD2 : Instructions operated by Monitor
b. SetID L 0h Set always 0 in Adjustment
c. VALUE : Adjustment Value
3.3 PC signal Gain/Offset Adjustment
3.3.1 Adjustment Preparation
- Execution of RF no signal during Heat Run over 30min
- Pattern generator signal is connected to the DVI-I Jack
of LCD TV.
3.3.1 Auto Gain/Offset Adjustment .
- To use Pattern Generator(MSPG-925FS), Apply Model
37, Patten 19 ( XGA(1024 X 768)60Hz, Half balck and
Half white signal (Don't apply 16 gray signal)
-Press IN-START Key by using the Remote
Controller(SVC) , after converting to Adjustment-Mode,
press VOL+ Key consecutively in Auto-Gain Menu.
- After adjustment is complete, pressing enter key, stores
and completes the process.
* Note) : PC Adjustment must be completed before auto
adjustment.
3.4 Video signal Gain/Offset Adjustment(Auto adjustment)
- Execution of White Pattern during Heat Run over 30min
- Connect to the LCD TV AV1 Scart input terminal with Patten
Generator(MSPG-925FS).
- Convert INPUT MODE to Video & Confirm whether PSM
Mode is Standard
- Connect RS-232C Communication Cable to the Auto
Adjustment Equipment and SET's upgrade Port
3.4.1 Adjustment Preparation
- Apply Gray-Level Gray-Level (Model : 202, pattern : 59)
signal by using Pattern Generator(MSPG-925FS)
- Check weather color-coordinates( x : 0.283, y : 0.298,
±0.005) is operated by using CA-110 equipment
-If color-coordinates is not in Spec, adjust color-
coordinates(x : 0.283, y : 0.298, ±0.005)by adjusting
Red Offset, Blue Offset
3.4.2 White Balance Adjustment
- Apply Gray-Level Gray-Level (Model : 202, pattern : 59)
signal by using Pattern Generator(MSPG-925FS)
- Check weather color-coordinates( x : 0.283, y : 0.298,
±0.005) is operated by using CA-110 equipment
-If color-coordinates is not in Spec, adjust color-
coordinates( x : 0.283, y : 0.298, ±0.005)by adjusting
Red Offset, Blue Offset
3.5 Component signal Gain/Offset Adjustment(Auto adjustment)
- Execution of RF no signal during Heat Run over 30min
- Connect to the LCD TV Component1 terminal with Patten
Generator(MSPG-925FS)
- Convert INPUT MODE to Component1.& Confirm whether
PSM Mode is Standard
- Connect RS-232C Communication Cable to the Auto
Adjustment Equipment and SET's upgrade Port
3.5.1 Low Gray Adjustment
- Apply Gray-Level (Model : 210, pattern : 59)signal by
using Patten Generator(MSPG925FS)
- Check whether color-coordinates (x : 0.283, y : 0.298,
±0.005) is operated by using CA-110 equipment
-If color-coordinates is not in Spec, adjust color-
coordinates( x : 0.283, y : 0.298, ±0.005) by adjusting
Red Offset, Blue Offset
3.5.2 White Balance Adjustment
- Apply full White (Model : 210, pattern : 47) signal by
using Patten Generator(MSPG925FS)
- Check whether color-coordinates (x : 0.283, y : 0.298,
±0.005) is operated by using CA-110 equipment
- If color-coordinates is not in Spec, adjust color-
coordinates (x : 0.283, y : 0.298, ±0.005)by adjusting
Red Gain, Blue Gain
- All adjustment takes color-coordinates with based on R,
changing G and B If it is not adjusted, adjust with fixed
G, changing R and R.
ADJUSTMENT INSTRUCTION
ai - 0 - 00
ak - 0 - 00

3.3 EDID (The Extended Display Identification Data)
- Connect D-Sub to DVI-I Cable to DVI-I Jack.
- Confirm the pc display by inputting the Analog signal.
- After displayed, input the Analog EDID data.
- Connect DVI D Cable to DVI Jack.
- Confirm the pc display by inputting the Digital signal.
- After displayed, input the Digital EDID data.
3.3.1 EDID DATA
<DDC DATA Analog Set>
< DDC DATA Digital Set>
3.4 HDCP (High-Bandwidth Digital Contents Protection) Setting
3.4.1 When transmitting HD video source of HD STB through
DVI(Digital Visual Interface), HDCP function is to execute
Display & copy protection for securing contents security.
3.4.2 Confirm whether HDCP function is operated properly by
connecting DVI Cable, after storing HDCP Key value on
EEPROM(AT24C16)[address 0x4EE] (Refer to Working
Order for Detailed work content ).
* Reference : HDCP adjustment is not use. We are planning
HDCP adjustment from NTSC.
Note. : HDCP will temporarily exclude in spec.
HDCP will apply from USA Product later.
- 11 -
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00 FF FF FF FF FF FF FF 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 0 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 58 31 52 56 0A 20 20 20 20 20 00 46
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 18 56 01 01 01 01
10 00 0F 01 03 81 40 26 78 0A 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 58 31 52 56 0A 20 20 20 20 20 01 C2
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 02 01 04 00 01 1D 00 72 51 D0 1E 20 6E 28 55 00
10 C4 8E 21 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E
20 96 00 C4 8E 21 00 00 18 01 1D 80 18 71 1C 16 20
30 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 00 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 BF

- 12 -
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

- 13 -
TROUBLESHOOTING
No power
(LED indicator off)
No Power
(LED indicator off)
Change IC1300, IC4 or IC6
Change LED Assy
Check 24V or 12V
of Power B/D
Check Output of
IC1300, IC4 or IC6
Check LED Assy
Check P101 Connector
Faill
Faill
Change L3, L1300
Check Output of
L3, L1300 Faill
Faill
Pass
Pass
Pass
:[A]Process

- 14 -
No Raster
Check LED Status
on display unit
Check the input/
Output of IC901
Check L900,L901
L902,L903
Check inverter
Connector or inverter
Check input source cable and jack
Repeat A PROCESS
Faill
Change L900,L901,
L902,L903
Faill
Change IC901
Faill
Change inverter
connector or inverter
Faill
Change panel link
cable or module
Faill
Change module
Faill
Check panel link
Cable or module
Pass
Pass
Pass
Pass
:[B]Process

- 15 -
No Raster on Component signal
Change
Q310,Q315,Q316
Check the signal of
Q310,Q315,Q316
Repeat
[A] Process
Check the input/
output of IC800
Check the input/
output of IC500
Check input source cable and jack
Faill
Re-soldering or
Change the defect part
Check IC800
Faill
Re-soldering or Change
the defect part Check
IC500,X500,IC501
Faill
Pass
Pass
Pass
Check the input/
output of IC901
Re-soldering or
Change the defect part
Check X900
Faill
Pass
Check the input/
output of IC600
Re-soldering or
Change the defect part
Check IC600
Faill
Pass
Pass
:[C]Process

- 16 -
No Raster on AV Signa
(AV1 S-Video) No Raster on TV(RF) signal
Change
Q317,Q318,Q308,
Q313
Check the signal of
Q317,Q318,Q308,Q313
Repeat
[A] Process Check the output of
TU1000
Faill
Faill Faill
Check 5V,33V of TU1000,
Re-soldering of Change the
defect part
Pass
Pass
:[C]Process

- 17 -
No Raster on DVD Signal
Check the signal of
R1211,R1212,R1213
Repeat
[A] Process
Faill Check P1200,P1202 or
DVD Cable
Pass
Pass
:[C]Process

- 18 -
No Sound(RF,SIDE AV) No Sound(AV, COMP1,DVD,PC)
Check the speaker wire
Change source input
Check the
input source Faill
Pass
Re-soldering or
Change the defect part
Check X11
Check the input/output
of IC1 Faill
Pass
Re-soldering or
Change the defect part
Check IC403,X601
Re-soldering or
Change the defect part
Check IC400
Check the input/
output of IC401 Faill
Pass
Check the input/
output of IC400 Faill
Pass
Change the speaker
Check the speaker Faill
Pass

BLOCK DIAGRAM
- 19 -
Tuner
TU1000
Tuner
TU1000
GM5221
IC901
GM5221
IC901
DVI
DVI
IF+,-
PC
SIDE_Comp.
AUDIO
VYP
bPrLR
LVDS 30 pin
POWER
FLI2300
IC500
FLI2300
IC500
SIDE_L,R
VCTI
IC1
VCTI
IC1
AN15865A
IC800
AN15865A
IC800
RAM
IC501
RAM
IC501
MST9883
IC600
MST9883
IC600
S-VHS
ROM
IC900
ROM
IC900
MSP4410K
IC401
MSP4410K
IC401
DVD_POWER & Y,Pb,Pr
RL
VCTI
sound_ LR
Comp 1_L,R
PC_L,R
AV_L,R
DVD_ LR
R,G,B
DVD_Y,Pb,Pr
TPA3008
AMP
TPA3008
AMP
SIDE_Y,Pb,Pr(Comp2)
Comp1_Y,Pb,Pr
PC_R,G,B & H/V sync
R,G,B
R/8
G/8
B/8
ADC_H/V_sync
R,G,B
FLI_H/V_sync
R,G,B
H/V_sync
DVI
LR

- 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, and converts them into
an ITU656 signal through the microcomputer (VCTI) combined with the video decoder that integrates various
functions in one chip.
Either the analog RGB(FLI2300) signal 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 RGB signal through the integrated
LVDS Cable.
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
inputsignal.
2. Power Supply Unit
The power supply unit provides 24V, 12V 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.
Supplied 24V power is descended by the 13.5V step-down DDC. 13.5V provides source to sound amplifier IC.
24V power is also used to generate 5V and 3.3V power through the Step-Down DC/DC Converter and supplied
12V.
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.