LG FLATRON M3201C User manual

COLOR MONITOR
SERVICE MANUAL
Website:http://biz.LGservice.com
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : LW61A
MODEL: M3201C (M3201C-BAFE.A**LLC)
M3701C (M3701C-BAFE.A**LLC)
M4201C (M4201C-BAFE.A**LLC)
( ) **Same model for Service
Internal Use Only

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. LCD CHARACTERISTICS
Type : TFT Color LCD Module
Active Display Area :
31.51 inches(800.4mm) diagonal-M3201C
: 37.02 inches(800.4mm) diagonal-M3701C
: 42.02 inches(1067.308mm) diagonal-M4201C
Pixel Pitch :
170.25 (H) x 510.75 (V) x RGB-M3201C
: 0.2mm (H) x 0.6mm (V) x RGB-M3701C
:
0.227mm (H) x 0.681mm (V) x RGB-M4201C
Color Depth : 8bits, 16,777,216 colors
Electrical Interface : LVDS
Size : 760(H) x 450(D) x 48(D)-M3201C
Size : 877(H) x 516.8(D) x 55.5(D)-M3701C
Size : 1006(H) x 610(D) x 59(D)-M4201C
Surface Treatment : Anti-Glare, Hard Coating(3H)
Operating Mode : Normally Black
Backlight Unit : 18EEFL (20lamps)-M3201C
Backlight Unit :
20EEFL (20lamps)-M3701C,M4201C
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio ≥10
Left : -85° min., -89°(Typ) Right : +85° min., +89°(Typ)
Top : +85° min., +89°(Typ) Bottom : -85° min., -89°(Typ)
2-2. Luminance : 400(min), 500(Typ)-9300K
2-3. Contrast Ratio : 600(min), 800(Typ)
at PSM : Standard, CSM : Normal
3. SIGNAL (Refer to the Timing Chart)
3-1. PC & Video Input
1)Input Form : RGB, HDMI/DVI, Component, Video,
S-Video
2)Resolution(max) : Analog -1600 x 1200@60Hz
Digital -1280 x 1024@60Hz
3-2. Sync Input
Horizontal : 30 ~ 83kHz(Digital: ~72kHz)
Vertical : 56 ~ 85Hz
Input Form : Separate, SOG, Composite, Digital
4. SPECIAL FUNCTION
4-1. Audio
1)Output Rating : 10W + 10W(Rated Output 10%)
2)Freq. Character : 100Hz~10KHz Range(-3dB)
3)T. H. D : Within 10%
4)Input Sensitivity : 0.700Vrms
4-2. Speaker
1)TYPE : Detachable
2)Impedance : 8
3)Input : Max : 15W, Normal : 10W
4-2. AV
1)Video Level : Input : 0.7 0.15Vp-p
2)Sync Level : Input : 0.286 0.075Vp-p
3)Color Burst : Input : 0.214 0.072Vp-p
4)Audio Level : NTSC Input : 0.40 0.1Vrms
PAL Input : 0.5 0.1Vrms
PC Input : 0.7 0.1Vrms
5)Video Cross Talk : 43dB
5. POWER SUPPLY
5-1. Power Adaptor
Input : AC 100~240V, 50/60Hz , 2.8A
5-2. Power Consumption
6. ENVIRONMENT
6-1. Operating Temperature: 10°C~35°C
6-2. Operating Humidity : 10%~80%
6-3. MTBF : 50,000 HRS with 90%
Confidence level
Lamp Life : 50,000 Hours(Min.)
CONTENTS
SPECIFICATIONS
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 4
TIMING CHART ....................................................... 8
BLOCK DIAGRAM ................................................. 10
DESCRIPTION OF BLOCK DIAGRAM...................11
ADJUSTMENT ...................................................... 12
SERVICE OSD ...................................................... 14
TROUBLESHOOTING GUIDE .............................. 17
WIRING DIAGRAM ............................................... 24
EXPLODED VIEW...................................................25
REPLACEMENT PARTS LIST ...............................31
SCHEMATIC DIAGRAM......................................... 42
MODE
POWER ON (NORMAL)
STAND-BY
SUSPEND
DPMS OFF
POWER SW OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
OFF/OFF
POWER CONSUMPTION
less than 145W-M3201C
less than 180W-M3701C
less than 240W-M4201C
less than 1 W
less than 4 W
less than 1 W
less than 4 W
less than 1 W
less than 4 W
less than 1 W
LED COLOR
-
RGB
HDMI
RGB
HDMI
RGB
HDMI
-
VIDEO
ACTIVE
OFF

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
7. DIMENSIONS (with Speaker/Stand)
M3201C
Width : 964 mm (31.61'')
Depth : 180 mm (3.93'')
Height : 540 mm (19.41'')
M3701C
Width : 1129 mm (31.61'')
Depth : 227.7 mm (3.93'')
Height : 619 mm (19.41'')
M4201C
Width : 1259 mm (31.61'')
Depth : 294.5 mm (3.93'')
Height : 702 mm (19.41'')
8. WEIGHT (with Speaker/Stand)
M3201C
Net. Weight : 21.1 kg (35.28 lbs)
Gross Weight : 26 kg (46.08 lbs)
M3701C
Net. Weight : 30.5 kg (35.28 lbs)
Gross Weight : 36.4 kg (46.08 lbs)
M4201C
Net. Weight : 44 kg (35.28 lbs)
Gross Weight : 46.5 kg (46.08 lbs)

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
WARNING FOR THE SAFETY-RELATED COMPONENT.
• There are some special components used in LCD
monitor that are important for safety. These parts are
marked on the schematic diagram and the
replacement parts list. It is essential that these critical
parts should be replaced with the manufacturer’s
specified parts to prevent electric shock, fire or other
hazard.
• Do not modify original design without obtaining written
permission from manufacturer or you will void the
original parts and labor guarantee.
TAKE CARE DURING HANDLING THE LCD MODULE
WITH BACKLIGHT UNIT.
• Must mount the module using mounting holes arranged
in four corners.
• Do not press on the panel, edge of the frame strongly
or electric shock as this will result in damage to the
screen.
• Do not scratch or press on the panel with any sharp
objects, such as pencil or pen as this may result in
damage to the panel.
• Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).
• Make certain that treatment person’s body are
grounded through wrist band.
• Do not leave the module in high temperature and in
areas of high humidity for a long time.
• The module not be exposed to the direct sunlight.
• Avoid contact with water as it may a short circuit within
the module.
• If the surface of panel become dirty, please wipe it off
with a softmaterial. (Cleaning with a dirty or rough cloth
may damage the panel.)
WARNING
BE CAREFUL ELECTRIC SHOCK !
• If you want to replace with the new backlight (CCFL) or
inverter circuit, must disconnect the AC adapter
because high voltage appears at inverter circuit about
650Vrms.
• Handle with care wires or connectors of the inverter
circuit. If the wires are pressed cause short and may
burn or take fire.
Leakage Current Hot Check Circuit
PRECAUTION
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this
service manual and its supplements and addenda, read
and follow the SAFETY PRECAUTIONS on page 3 of this
publication.
NOTE: If unforeseen circumstances create conflict
between the following servicing precautions and any of the
safety precautions on page 3 of this publication, always
follow the safety precautions. Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC
power source before;
a. Removing or reinstalling any component, circuit
board module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical
plug or other electrical connection.
c. Connecting a test substitute in parallel with an
electrolytic capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect
polarity installation of electrolytic capacitors may
result in an explosion hazard.
d. Discharging the picture tube anode.
2. Test high voltage only by measuring it with an
appropriate high voltage meter or other voltage
measuring device (DVM, FETVOM, etc) equipped with
a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Discharge the picture tube anode only by (a) first
connecting one end of an insulated clip lead to the
degaussing or kine aquadag grounding system shield
at the point where the picture tube socket ground lead
is connected, and then (b) touch the other end of the
insulated clip lead to the picture tube anode button,
using an insulating handle to avoid personal contact
with high voltage.
4. Do not spray chemicals on or near this receiver or any
of its assemblies.
5. Unless specified otherwise in this service manual,
clean electrical contacts only by applying the following
mixture to the contacts with a pipe cleaner, cotton-
tipped stick or comparable non-abrasive applicator;
10% (by volume) Acetone and 90% (by volume)
isopropyl alcohol (90%-99% strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual,
lubrication of contacts in not required.
6. Do not defeat any plug/socket B+ voltage interlocks
with which receivers covered by this service manual
might be equipped.
7. Do not apply AC power to this instrument and/or any of
its electrical assemblies unless all solid-state device
heat sinks are correctly installed.
8. Always connect the test receiver ground lead to the
receiver chassis ground before connecting the test
receiver positive lead.
Always remove the test receiver ground lead last.
9. Use with this receiver only the test fixtures specified in
this service manual.
CAUTION: Do not connect the test fixture ground strap
to any heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be
damaged easily by static electricity. Such components
commonly are called Electrostatically Sensitive (ES)
Devices. Examples of typical ES devices are integrated
circuits and some field-effect transistors and
semiconductor "chip" components. The following
techniques should be used to help reduce the incidence of
component damage caused by static by static electricity.
1. Immediately before handling any semiconductor
component or semiconductor-equipped assembly, drain
off any electrostatic charge on your body by touching a
known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device,
which should be removed to prevent potential shock
reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with
ES devices, place the assembly on a conductive
surface such as aluminum foil, to prevent electrostatic
charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or
unsolder ES devices.
4. Use only an anti-static type solder removal device.
Some solder removal devices not classified as "anti-
static" can generate electrical charges sufficient to
damage ES devices.
5. Do not use freon-propelled chemicals. These can
generate electrical charges sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its
protective package until immediately before you are
ready to install it. (Most replacement ES devices are
packaged with leads electrically shorted together by
conductive foam, aluminum foil or comparable
conductive material).
7. Immediately before removing the protective material
from the leads of a replacement ES device, touch the
protective material to the chassis or circuit assembly
into which the device will be installed.
CAUTION: Be sure no power is applied to the chassis
or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Otherwise harmless motion
such as the brushing together of your clothes fabric or
the lifting of your foot from a carpeted floor can
generate static electricity sufficient to damage an ES
device.)

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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.
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.

- 7 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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.

TIMING CHART
- 8 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
VIDEO
SYNC
B
D
C
F
E
A
<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>
1) PC Mode
1~17 : D-SUB, DVI-D: 1~15
1 H(Pixels) + 25.175 31.469 800 640 16 96 48 640 x 350
V(Lines) - 70.8 449 350 37 2 60
2 H(Pixels) - 28.321 31.468 900 720 18 108 54 720 X 400
V(Lines) + 70.8 449 400 12 2 35
3 H(Pixels) - 25.175 31.469 800 640 16 96 48 640 x 480
V(Lines) - 59.94 525 480 10 2 33
4 H(Pixels) - 31.5 37.5 840 640 16 64 120 640 x 480
V(Lines) - 75 500 480 1 3 16
5 H(Pixels) - 36.0 43.269 832 640 56 56 80 640 x 480
V(Lines) - 85.0 509 480 1 3 25
6 H(Pixels) + 40.0 37.879 1056 800 40 128 88 800 x 600
V(Lines) + 60.317 628 600 1 4 23
7 H(Pixels) + 49.5 46.875 1056 800 16 80 160 800 x 600
V(Lines) + 75.0 625 600 1 3 21
8 H(Pixels) + 56.25 53.674 1048 800 32 64 152 800 x 600
V(Lines) + 85.061 631 600 1 3 27
9 H(Pixels) +/- 57.283 49.725 1152 832 32 64 224 832 x 624
V(Lines) +/- 74.55 667 624 1 3 39
10 H(Pixels) - 65.0 48.363 1344 1024 24 136 160 1024 x 768
V(Lines) - 60.0 806 768 3 6 29
11 H(Pixels) - 78.75 60.123 1312 1024 16 96 176 1024 x 768
V(Lines) - 75.029 800 768 1 3 28
12 H(Pixels) + 94.5 68.68 1376 1024 48 96 208 1024 x 768
V(Lines) + 85.00 808 768 1 3 36
13 H(Pixels) + 74.5 44.772 1664 1280 64 128 192 1280 x 720
V(Lines) + 59.855 748 720 3 5 20
14 H(Pixels) + 84.75 47.72 1776 1360 72 136 208 1360 x 768
V(Lines) + 59.799 798 768 3 5 22
15 H(Pixels) + 108.0 63.981 1688 1280 48 112 248 1280 x 1024
V(Lines) + 60.02 1066 1024 1 3 38
16 H(Pixels) + 135.00 79.98 1688 1280 16 144 248 1280 x 1024
V(Lines) + 75.02 1066 1024 1 3 38
17 H(Pixels) + 162.00 75.00 2160 1600 90 30 88 1600 x 1200
V(Lines) + 60 1250 1200 1 3 46
MODE H / V Sync
Polarity
Dot
Clock Frequency Total
Period
( E )
Video
Active
Time ( A )
Front
Porch
( C )
Sync
Duration
( D )
Back
Porch
( F ) Resolution

- 9 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2) DTV Mode
Component Input(Y/Pb/Pr)
Resolution H-freq(kHz) V-freq(Hz)
1. 720*480 15.63 59.94 SDTV, DVD 480i
2. 720*483 31.47 59.94 EDTV 480p
3. 720*576 15.625 50.00 SDTV, DVD 625 Line
4. 720*576 31.25 50.00 HDTV 576p
5. 1280*720 45.00 60.00 HDTV 720p
6. 1280*720 37.5 50 HDTV 720p
7. 1280*720 44.96 59.94 HDTV 720p
8. 1920*1080 31.25 50.00 HDTV 1080i 50Hz (Australia)
9. 1920*1080 33.75 60.00 HDTV 1080i 60Hz (ATSC)
10. 1920*1080 33.72 59.94 HDTV 1080i 59.94Hz
RGB-DTV, HDMI/DVI-DTV Input
Resolution H-freq(kHz) V-freq(Hz)
1. 480/60P 31.5 60 EDTV 480p
2. 720/60P 45 60 HDTV 720p
3. 1080/60i 33.75 60 HDTV 1080i 60Hz (ATSC)
4. 576/50P 31.25 50.00 HDTV 576p
5. 720/50P 37.5 50 HDTV 720p
6. 1080/50i 28.1 50 HDTV 1080i 50Hz (Australia)

- 10 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
AT49BV160
(Flash Memory)
IC309
HY5DU281622ETP
(DDR SDRAM)
IC310
HY5DU281622ETP
(DDR SDRAM)
IC311
KEY1 / KEY2
PREAMP IR
WIRE CONTROL
RXD / TXD
24bit
PC R/G/B
PC R/G/B OUT PC H/V SYNC
PC H/V SYNC
PC H/V SYNC OUT
(D526, D527)
HDMI
(JK501)
WIRE
CONTROL
(JK500)
RS-232C
IN / OUT
(P502)
PC RGB
IN / OUT
(P503)
PC Audio
(IC510)
(IC511)
(IC512)
500KHz
(X501)
19.6608MHz
(X801)
(IC509)
SYNC_DE
C_OUT
V / Y_OUT
Y/C
I2S
Delayed I2S
18.432MHz
(X800)
OUT1A
OUT1B
OUT2A
OUT2B
AV Audio OUT
PC Audio IN
Component Audio IN
AV Audio IN
CVBS
CVBS OUT
Component 1, 2 IN
Component 1, 2 Y Pb Pr
Component 1, 2
Audio IN
(JK503)
CVBS
IN / OUT
(JK514)
CVBS
IN / OUT
(JK513)
S-Video
(JK506)
(JK512) (JK511) (JK510)
27MHz
(X500)
ICL3232C
(RS232C)
IC503
74HC14D
(Schmitt Trigger
Inverter)
IC507
CM2021
(ESD
Protector)
AD8009
(OP AMP)
LA7217M
(Video Sync
Seperator)
LC FILTER
TAS5122
(D-CLASS AMP)
IC802
NTP2000
(Digital Audio Processor)
IC805
NJU26901
(Audio Delay)
IC803
MSP4440K
(Audio Processor)
IC804
CXA2040AQ
(Video Switch)
IC513
ANX9021
(HDMI
RX’er)
IC508
32" / 37" / 42"
LCD Panel
FLI8662
(Cortez Advanced)
IC101
KEY CONTROL B’D
(6871TST481G)
RXC /RX0 RX1 /RX2
RXC /RX0 RX1 /RX2
BLOCK DIAGRAM

- 11 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
DESCRIPTION OF BLOCK DIAGRAM
1. AV INPUT SELECTION CIRCUIT
1) AV(Video) INPUT SELECT : This section is
composed of Video switching IC
(CXA2040AQ_IC513) and peripheral devices.
Video switching IC(CXA2040AQ_U201) selects
CVBS video or S-video and the signal is sent to
Scaler IC(IC101).
2) AV Sync Detection : This section is composed of
Sync Separator IC(LA7217M_IC509) and peripheral
devices.
Av input selection block sends selected signal to
Sync detection block then sync detection block
identifies if AV signal is present or not. And this
block sends this information to Scaler(Micom).
2. Component INPUT
Component input signal was connected from input jack
to scaler directly.
3. RGB INPUT OUTPUT CIRCUIT
1) D-SUB RGB INPUT OUTPUT : This section is
composed of RGB Input Output Jack(P503),
Schmitt trigger inverter IC(IC507), OP-AMPs(IC510,
IC511, IC512) and peripheral devices.
RGB input signal path was connected from input
jack to Scaler directly. But scaler receives RGB
Sync signal via schmitt trigger inverter IC.
RGB output signal was made by OP-Amp ICs. And
this sends output signal to RGB output jack.
4. HDMI INPUT CIRCUIT
This section is composed of TMDS receiver
IC(ANX9021_IC508), ESD protection
diode(CM2021_D526, D527) and peripheral devices.
TMDS receiver IC receives TMDS signal via ESD
protection diode. And it convert HDMI signal to digital
RGB signal. And it sends to scaler.
5. RS-232C INPUT OUTPUT CIRCUIT
This section is composed of RS-232C
IC(ICL3232C_IC503), and peripheral devices.
Computer and scaler(micom) was connected by RS-
232C IC.
6. VIDEO SIGNAL PROCESSOR (FORMAT
CONVERTER)
This section is composed of FLI8662(IC101) and
peripheral devices.
FLI8662(SCALER_IC101) has in built MICOM in IC.
(1) This IC includes A/D Converter, Pre-Amp, PLL
Circuit.
(2) This IC includes video decoder and De-interlacer.
(3) This IC includes LVDS Transmitter.
LVDS Transmitter is encoding the output Signal.
Also, FLI8662 have Format Converter (Scaling)
function.
This IC converts Various size of Digital signal to LCD
Module's resolution (WXGA).
7. AUDIO DECODER
This section is composed of MSP4440K(IC804),
NTP2000(IC805) and peripheral devices.
MSP4440K is processing audio signal(AV,
Component, PC Audio and IIS).
Digital audio processor IC receives IIS signal from
MSP4440K, and converts IIS to PWM signal.
This IC's output signal is sent to Audio Amplifier
IC(TAS5122_IC802).
8. AUDIO AMPLIFIER
This section is composed of TAS5122(IC802) and
peripheral devices.
Audio Amplifier's function is amplification of sound
signal received from Audio Decoder.
Input Audio signal is amplified according to the DC
Volume control curve.

- 12 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
ADJUSTMENT
All adjustment are thoroughly checked and corrected
when the monitor leaves the factory, but sometimes
several minor adjustment may be required.
Adjustment should be following procedure and after
warming up for a minimum of 30 minutes.
•Alignment appliances and tools.
- IBM compatible PC
- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)
- Oscilloscope.
- White Balance Meter. (CA-110)
1. DDC Data Write Procedure-Analog
1) Use this procedure only when there is some problem
on Analog EDID data.
2) Run alignment program for M3201C on the IBM
compatible PC.
3) Select EEPROM → Analog EDID write command
and Enter.
4) This will write the Analog EDID data to EEPROM.
2. DDC Data Write Procedure-Digital
1) Use this procedure only when there is some problem
on Digital EDID data.
2) Run alignment program for M3201C on the IBM
compatible PC.
3) Select EEPROM → Digital EDID write command and
Enter.
4) This will write the Digital EDID data to EEPROM.
RS-232C EXT.
220
IBM
Compatible PC
Parallel Port
Power inlet (required)
Power LED
ST Switch
Power Select Switch
(110V/220V)
Control Line
Not used
RS232C
PARALLEL
V-SYNCPOWER
ST
VGSMONITOR
E
V-Sync On/Off Switch
(Switch must be ON.)
F
A
B
C
5V
E
F
A
B
C
15
10
5
5
69
1
1
1
14
13
25
6
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11
Figure 1. Cable Connection

- 13 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Windows EDID V1.0 User Manual
Operating System: MS Windows 98, 2000, XP
Port Setup: Windows 98 => Don’t need setup
Windows 2000, XP => Need to Port Setup.
This program is available to LCD Monitor only.
1. Port Setup
a) Copy “UserPort.sys”file to
“c:\WINNT\system32\drivers”folder
b) Run Userport.exe
c) Remove all default number
d) Add 300-3FF
e) Click Start button.
f) Click Exit button.
2. EDID Read & Write
1) Run WinEDID.exe
2) Edit Week of Manufacture, Year of Manufacture,
Serial Number
a) Input User Info Data
b) Click “Update”button
c) Click “Write”button

- 14 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
SERVICE OSD
LW61A
Cortez Version 3.00
Panel Used 106 Hr.
Tool Option 1 11
Tool Option 2 96
Area Option 0
OPTION 1 0
OPTION 2 0
OPTION 3 2
OPTION 4 0
System Control 1
System Control 2
System Control 3
BlkLine Detector
Power-off History
Fan Control
Tool Option 1
MODULE L32LPL
MODULE OPTION SW
Tool Option 2
Tool Option 2 96
Tuner Num. No Tuner
EYE 0
INDEX 0
RGB ONLY 0
Full 1
HDMI Type 1-HDMI
System Control 1
System Control 1
32
SplitZoom key 0
Save Split Zoom 0
2 Hour Off Opt. 0
OSD Rotate 0
Favorite Key 0
Exit Key 1
Navigation key 0
The OSD is displayed when 'ADJ Key is pressed on ADJUST
REMOCON in Service Menu.
Description of operation
- LW61A : Model chassis
- Cortez Version : Software Version
- Panel Used : Use time the Panel
- Area Option
- OPTION 1
- OPTION 2 Not Use
- OPTION 3
- OPTION 4
- System Control 3 : Debug Print Set up
- Power-off History : History Memory of Abnormal
- Fan Control : Nothing
The OSD is displayed when 'OK' Key is pressed on Tool
Option 1 in Service Menu.
Tool Option 1
- MODULE : Inch, make factory Module change
- Cortez Version : Fix SW (Not change)
The OSD is displayed when 'OK' Key is pressed on Tool
Option 2 in Service Menu.
Tool Option 2
- Tuner Num. : Fix No Tuner (Not Adjust)
- EYE : Fix Intelligent Eye Not Action (Not Adjust)
- INDEX : Nothing
- RGB ONLY : Select the RGB Only Model
- Full : Set the ARC Full
- HDMI Type : Fix HDMI : 1-HDMI (Not Adjust)
The OSD is displayed when 'OK' Key is pressed on System
Control 1 in Service Menu.
System Control 1
- SpritZoom / Save sprilt Zoom : Nothing
- 2 Hour Off opt. :
If no key input is made for 2 hours, Sets the Power off
- OSD Rotate : Nothing
- Favorite Key / Exit Key / Navigation Key : Remot conntroller Key
(Not adjust)

- 15 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
System Control 2
System 4-SYS
OverScan 5%
RS-232 Host PC
Baud Rate 9600bps
RS-232 Select New
AGC-L 253 140
Audio Delay 0
BlkLine Detector
BlkLine Min. 10
BlkLine Max 70
BlkLine Gap. 20
Full Time 8
Original Time 2
Panel Control
AV / PC AV
ISM Auto
Gamma 0
Pwr. Save 75%
Bright 63%
Pnl.Lock Lock
OrbitPixel 2
Orbit Step 2
OrbitTime 120 Sec.
Inv.Time 30 Min
GUC 0
AMSE 0
Module Download 0
Reset Panel Used Time
The OSD is displayed when 'OK' Key is pressed on BlkLine
Detector in Service Menu.
BlkLine Detector
- BlkLine Min : Sets the BlkLine Min
- BlkLine Max : Sets the BlkLine Max
- Full Time : Sets the Full time
- Original Time : Sets the Original time
The OSD is displayed when 'OK' Key is pressed on System
Control 2 in Service Menu.
System Control 2
- System : Sets the Color system mode
- OverScan : Sets the Video Signal OverScan
- RS-232 Host : Nothing
- Baud Rate : Sets the RS-232 communication speed
- RS-232 Select : Select the RS-232 communication
- AGC-L : Nothing
- Audio Delay : Sets the Audio Delay(ms)
The OSD is displayed when 'OK' Key is pressed on Panel
Control in Service Menu.
Panel Control
- AV / PC : Nothing
- ISM : Nothing
- Gamma : Nothing
- Pwr.Save : Nothing
- Bright : Nothing
- Pnl.Lock : Nothing
- OrbitPixel : Sets the Pixel
- Orbit Step : Sets the Step
- Orbit Time : Sets the Time
- Inv.Time : Sets the inversion time
- GUC : Nothing
- AMSE : Nothing
- Module Download : Nothing
- Reset Panel Used Time : Reset the Panel Use Time

- 16 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Hotel Option
Station Menu Display No
Program Change No
Input Source Change Yes
Fixed Volume No
Max Volume 100
OSD Display Yes
Remocon Operation Yes
Local Key Operation Yes
Power On Operation No
Promgram Off
--
Volume Off
--
Set ID Lock No
Set ID 1
Auto Off Operation Yes
Hotel Mode Operation Yes
Auto Color Balance (Hex)
Source MAIN
Red Offset 1 102
Green Offset 1 0C6
Blue Offset 1 0DA
Red Offset 2 3F
Green Offset 2 3F
Blue Offset 2 3F
Red Gain 072
Green Gain 070
Blue Gain 07B
Reset To set
Auto-RGB
White Balance (Hex)
Red Gain 77
Green Gain 80
Blue Gain 7C
Red Offset 7C
Green Offset 80
Blue Offset 8C
Reset To set
The OSD is displayed when 'MENU' Key is pressed in
Service Menu.
Hotel Option
- Station Menu Display : Nothing
- Program Change : Nothing
- Input Source Change : Enables (Yes)/Disables (No) input source change.
- Fixed Volume : Sets Yes (Fixed)/No (Variable) about whether the sound
volume will be fixed to the current value or not.
- Max Volume : Sets the maximum volume within the range of 0 ~ 100 when
volume control is allowed.
- OSD Display : Nothing
- Remote Control Operation : Activates (Yes)/Deactivates (No) remote control
operation.
- Local Key Operation : Activates (Yes)/Deactivates (No) local key operation.
- Power On Operation : Sets Yes (Operation)/No (No operation) about
whether the channel and the volume level that will be displayed when the
power is turned on.
- Set ID Lock : Sets the Set ID function
- Set ID : Attach ID
- Auto Off Operation : Sets whether the automatic turn-off function will be
activated or not with On (Activated) or Off (Deactivated) option, which turns
off the TV if no key input is made for 2 hours, using Auto Off operation and On
Time on the Time menu.
- Hotel Mode Operation : Sets whether all Hotel functions will be enabled
(Yes) or disabled (No).
The OSD is displayed when 'IN-START' Key is pressed on
ADJUST REMOCON in Service Menu.
- Auto Color Balance (Hex) : Adjust Color Balance
The OSD is displayed when 'ADJ' Key is pressed on ADC in
Service Menu.
- White Balance : Adjust White Balance

- 17 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER
(POWER INDICATOR OFF)
CHECK POWER BOARD
CHECK P103
(ST_5V)
NO(Low)
CHECK POWER BOARD
CHECK P103
(PWR_ONOFF)
YES(High)
1. Check IC101
2. Check all Vcc of IC101
YES(High)
NO(Low)
YES
YES(High)
CHECK X801
CHECK X801
(19.66MHz) ?
NO
CHECK RESET IC
CHECK IC306
(/SYS_RESET) ?
NO(Low)

- 18 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. NO RASTER(OSD IS NOT DISPLAYED)
NO RASTER
(OSD IS NOT DISPLAY)
CHECK THE PERIPHERALS
OF IC101
CHECK IC101
OUTPUT WAVE
NO
CHECK WAFER, CONNECTOR
AND POWER BOARD
CHECK
INVERTER VOLTAGE
(24V)?
NO
1. CHECK INVERTER
2. CHECK T-CON BOARD
YES
YES
YES
CHECK
MODULE LINK CONNECTOR
CHECK
MODULE INPUT
WAVE
NO
CHECK WAFER, CONNECTOR
AND POWER BOARD
CHECK
T-CON VOLTAGE
(12V)
NO
YES

- 19 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. NO RASTER STATE ON VIDEO SIGNAL
NO RASTER STATE ON
VIDEO SIGNAL(AV/S-VHS)
CHECK SIGNAL CABLE AND
OUTPUT DEVICE
CHECK INPUT JACK
(JK506, JK514)
NO
CHECK Vcc AND
PERIPHERALS OF IC513
CHECK
VIDEO SWITCH IC
OUTPUT
(CXA2040AQ)
NO
1. CHECK IC101
2. CHECK Vcc OF IC101
3. CHECK PERIPHERALS OF
IC101
YES
YES
CHECK Vcc AND
PERIPHERALS OF IC509
CHECK
SYNC DETECTOR
OUTPUT
(LA7217M)
NO
YES

- 20 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. NO RASTER STATE ON RGB SIGNAL
NO RASTER STATE ON
RGB SIGNAL
CHECK SIGNAL CABLE AND
OUTPUT DEVICE
CHECK INPUT JACK
(P503)
NO
CHECK Vcc AND
PERIPHERALS OF IC507
CHECK SCHMITT
TRIGGER I/O
SYNC (IC507)
NO
1. CHECK IC101
2. CHECK Vcc OF IC101
3. CHECK PERIPHERALS OF
IC101
YES
YES