LG Flatron M228WD 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. : LD73D
MODEL: M228WD (M228WD-BZH.A**OLF)
*( ) **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
CONTENTS
CONTENTS .............................................................................................. 2
PRECAUTION ...........................................................................................3
SPECIFICATION ........................................................................................7
DISASSEMBLY ........................................................................................12
ADJUSTMENT ........................................................................................14
TROUBLE SHOOTING ............................................................................19
BLOCK DIAGRAM...................................................................................26
EXPLODED VIEW ...................................................................................27
REPLACEMENT PARTS LIST ............................................................... 29
SVC. SHEET ...............................................................................................

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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.

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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.

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Application range
This specification is applied to 22" Wide Monitor TV used
LD73D chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
(1) Power Voltage : Standard input voltage (100~240V@,
50/60Hz)
*Standard Voltage of each products is marked by models.
(2) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(3) The receiver must be operated for about 20 minutes prior
to the adjustment.
3. Test method
3.1 Performance : LGE test method followed
3.2 Demanded other specification
Safety : CE, IEC Specification
EMC : CE, IEC
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
4-1. General Specification (TV)
4. Electrical Specification
No Item Specification Remark
1 Video input applicable system PAL-D/K, B/G, I, SECAM
2 Receivable Broadcasting System PAL/SECAM BG EU(PAL Market)
PAL/SECAM DK
PAL I/II
SECAM L/L’
DVB-T
3 RF Input Channel VHF : E2 ~ E12 PAL
UHF : E21 ~ E69
CATV : S1 ~ S20
HYPER : S21~ S47
4 Input Voltage 100 ~ 240V/50Hz, 60Hz
5 Market EU
6 Picture Size 22 inch
7 Tuning System FVS 100 program PAL, 200 PR.(Option)
8 Operating Environment Temp : 10°C ~ 35°C
Humidity : 20% ~ 80%
9 Storage Environment Temp : -10°C ~ 60°C Non condensing
Humidity : 5% ~ 90% Non condensing
10 Display LCD Module LPL

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
No. Item Specification Remark
1 Supported Sync. Type Separate Sync., Digital
2 Operating Frequency Analog Horizontal 30 ~ 83kHz
Vertical 56 ~ 75 Hz
Digital Horizontal 30 ~ 83kHz
Vertical 56 ~ 75 Hz
3 Resolution Analog Max. 1680 x 1050 @ 60Hz
Recommend 1680 x 1050 @ 60Hz
Digital Max. 1680 x 1050 @ 60Hz
Recommend 1680 x 1050 @ 60Hz
4 Inrush Current Cold Start : 50 A Hot : 120 A
5 Operating Condition Sync (H/V) Video LED Wattage
Power S/W On On mode On/On Active Blue 70W Max.
On/On Active Blue 60W Typ.
Sleep mode Off/On Off Amber 1W
On/Off
Power S/W Off Off mode - Off Off 1W
6 MTBF 50,000 HRS with 90% Confidence level Lamp Life : 50,000 Hours(min)
7 Using Altitude 5,000 m (for Reliability) 3,000m(for FOS)
4-2. General Specification (PC)
No. Item Specification Unit Remark
1. Type TFT Color LCD Module
2. Active Display area 473.76 (H) x 296.1 (V) mm
3. Outline dimension 493.7 (H) x 320.1 (V) x16.5 (D) mm Typ
4. Pixel pitch 0.282mm (H) x 0.282mm (V) x RGB mm
5. Color arrangement RGB vertical stripe
6. Color Depth 16.7M color
7. Electrical Interface LVDS
8. Surface Treatment Hard coating(3H) & Anti-glare(Haze 25)
9. Operating Mode Normally White
10. Back light Unit 4 CCFL (4 lamps)
11. R/T R.T : 1.3ms + R.T : 3.7ms Typ.
4-3. General Specification (LCD Module)

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4-4. Optical characteristic specifications
No. Item Specification Remark
Min Typ Max
1 Viewing Angle R/L 70/70 80/80
<CR>10> U/D 60/70 75/85
2 Luminance RGB 250 300 PSM:Dynamic, CSM: 6500K
Luminance Full White(100 IRE)
(cd/m2) AV/TV/HDMI 190 250 PSM:Dynamic, CSM:Cool
Component Full White(100 IRE)
Variation 75% Min / Max
RGB/AV/ At DFC Mode
3 Contrast Ratio CR TV/HDMI/ 500 800 Typ. 3000 :1, Min. 2400:1
Component
4 CIE Color Coordinates WHITE Wx 0.313
Wy 0.329 In RGB input
RED Rx 0.635
Ry 0.342 PSM : Dynamic
GREEN Gx 0.292 CSM : 6500K
Gy 0.611 White
BLUE Bx 0.147 (100 IRE)
By 0.070
WHITE Wx 0.285
In AV/Component/TV HDMI input
Wy 0.293
PSM:Dynamic, CSM:Cool, White (85IRE)
Typ.
+0.015
Typ.
+0.015
Typ.
-0.015
Typ.
-0.015
5. Component Video Input (Y, PB, PR)
No Specification Proposed
Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz)
1. 720*480 15.73 59.94 13.500 480i
2. 720*480 15.75 60.00 13.514 480i
3. 720*576 15.625 50.00 13.500 576i
4. 720*480 31.47 59.94 27.000 480p
5. 720*480 31.50 60.00 27.027 480p
6. 720*576 31.25 50.00 27.000 576p
7. 1280*720 44.96 59.94 74.176 720p
8. 1280*720 45.00 60.00 74.250 720p
9. 1280*720 37.50 50.00 74.250 720p
10. 1920*1080 33.72 59.94 74.176 1080i
11. 1920*1080 33.75 60.00 74.250 1080i
12. 1920*1080 28.125 50.00 74.250 1080i
13. 1920*1080 67.50 60.00 74.250 1080p

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
6. RGB PC
* RGB-PC EDID DATA
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz)
1. 720*400 31.468 70.08 28.321
2. 640*480 31.469 59.94 25.175
3. 640*480 37.5 75 31.5
4. 800*600 37.879 60.317 40.0
5. 800*600 46.875 75.0 49.5
6. 1024*768 48.363 60.0 65.0
7. 1024*768 60.123 75.029 78.75
8. 1152*864 67.500 75.000 108.0
9. 1280*1024 63.981 60.02 108.0
10. 1280*1024 79.976 75.035 135.0
11. 1680*1050 64.674 59.883 119.0
12. 1680*1050 65.290 59.954 146.25
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D 70 56
0x01 01 03 08 2F 1E 78 EA AE C5 A2 57 4A 9C 25
0x02 12 50 54 A7 6B 80 95 0F 95 00 81 80 81 40 71 4F
0x03 01 01 01 01 01 01 7C 2E 90 A0 60 1A 1E 40 30 20
0x04 36 00 D9 28 11 00 00 1A 21 39 90 30 62 1A 27 40
0x05 68 B0 36 00 D9 28 11 00 00 1C 00 00 00 FD 00 38
0x06 4B 1E 53 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
0x07 00 4D 32 32 38 57 44 2D 42 5A 0A 20 20 20 00
Serial No
Month/Year
C/S
- HDMI DTV TABLE
7. HDMI
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remark Proposed
1. 720 x 480 31.47 59.94 27.00 SDTV 480p 60Hz(4:3)
2. 720 x 480 31.50 60 27.027 SDTV 480p 60Hz(4:3)
3. 640 x 480 31.50 59.94 25.175 SDTV 480p 60Hz(4:3)
4. 640 x 480 31.50 60 25.20 SDTV 480p 60Hz(4:3)
5. 720 x 480 31.47 59.94 27.00 SDTV 480p 60Hz(16:9)
6. 720 x 480 31.47 60 27.027 SDTV 480p 60Hz(16:9)
7. 720 x 576 31.25 50.00 27.000 SDTV 576p 50Hz
8. 1280 x 720 45.00 50.00 74.176 HDTV 720p 50Hz HDCP
9. 1280 x 720 44.96 59.94 74.176 HDTV 720p 60Hz HDCP
10. 1280 x 720 44.96 60 74.250 HDTV 720p 60Hz HDCP
11. 1920 x 1080 28.13 50.00 74.250 HDTV 1080i 50Hz HDCP
12. 1920 x 1080 33.72 59.94 74.176 HDTV 1080i 60Hz HDCP
13. 1920 x 1080 33.75 60 74.250 HDTV 1080i 60Hz HDCP
14. 1920 x 1080 27 24 74.250 HDTV 1080P 24Hz HDCP
15. 1920 x 1080 56.25 50.00 148.500 HDTV 1080P 50Hz HDCP
16. 1920 x 1080 67.43 59.94 148.352 HDTV 1080P 60Hz HDCP
17. 1920 x 1080 67.50 60 148.500 HDTV 1080P 60Hz HDCP

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
- HDMI PC TABLE
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz)
1. 720*400 31.468 70.08 28.321
2. 640*480 31.469 59.94 25.175
3. 640*480 37.5 75 31.5
4. 800*600 37.879 60.317 40.0
5. 800*600 46.875 75.0 49.5
6. 1024*768 48.363 60.0 65.0
7. 1024*768 60.123 75.029 78.75
8. 1152*864 67.500 75.000 108.0
9. 1280*1024 63.981 60.02 108.0
10. 1280*1024 79.976 75.035 135.0
11. 1680*1050 64.674 59.883 119.0
12. 1680*1050 65.290 59.954 146.25
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D 71 56
0x01 01 03 80 2F 1E 78 0A AE C5 A2 57 4A 9C 25
0x02 12 50 54 A7 6B 80 71 4F 81 80 81 40 01 01 01 01
0x03 01 01 01 01 01 01 7C 2E 90 A0 60 1A 1E 40 30 20
0x04 36 00 D9 0A 11 00 00 1A 21 39 90 30 62 1A 27 40
0x05 68 B0 36 00 D9 0A 11 00 00 1C 00 00 00 FD 00 38
0x06 4B 1E 53 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
0x07 00 4D 32 32 38 57 44 2D 42 5A 0A 20 20 20 01
0x00 02 03 21 F1 4E 81 02 03 15 12 13 04 14 05 20 21
0x01 22 1F 10 23 09 07 07 83 01 00 00 65 03 0C 00 10
0x02 00 01 1D 00 80 51 D0 1C 20 40 80 35 00 BC 88 21
0x03 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 13
0x04 8E 21 00 00 18 02 3A 80 18 71 38 2D 40 58 2C 45
0x05 00 06 44 21 00 00 1E 01 1D 80 18 71 1C 16 20 58
0x06 2C 25 00 C4 8E 21 00 00 9E 4E 1F 00 80 51 00 1E
0x07 30 40 80 37 00 BC 88 21 00 00 18 00 00 00 00
Serial No
Month/Year
C/S
1D
* HDMI EDID DATA

DISASSEMBLY
- 12 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Push down slightly to disassembly it.
2. After push the cable management like above fig.(Downward),
Disassembly the Cable management with pulling it upward.
3. Disassembly Cable Holder.
Disassembly Stand base.
Remove base body Like a picture. Push 2 letches Like a picture.
Push the button.
Hold the stand base.
# 1
# 4
# 2
# 5
# 3
# 6

- 13 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
# 7
# 9
# 8
# 10
Pull base body to separate from set during pressing 2 letches.
Remove the screws.
# 11
Pull the connector.
Disassembly back cover.
1. Remove the screws.
2. Disassembly Hinge Cover.

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
ADJUSTMENT
1. Application Range
This document is applied to 22" LCD Monitor TV which is
manufactured in TV(or Monitor) Factory or is produced on the
basis of this data.
2. Specification.
1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer.
However, the use of isolation transformer will help to
protect test instruments
2) Adjustment must be done in the correct sequence.
3) The adjustment must be performed at 25±5°C temperature
and 65±10% relative humidity if there is no specified
designation.
4) The input voltage of the receiver must be kept between
100-220V~, 50/60Hz.
5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. Channel Memory
3.1. Setting up the LGIDS
1) Press ADJ key in Adjust remote control.
2) Select “Channel Recover”by using D/E(CH+/-) key, and
press G(VOL+).
3) When Channel Recover is completed, set will be turned off
and LED light go to stand-by mode.
4. EDID
* Caution
* Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
-> Caution : - Never connect HDMI & D-sub Cable at the
same time.
Use the proper cables below for EDID
Writing.
4.1. EDID Data
4.2. Data
(1) ANALOG (128 bytes)
(2) HDMI 1 (256 bytes)
=> Detail EDID Options are below (a, b, c, d, e-1, e-2)
(a) Product ID
(b) Serial No: Controlled on production line.
(c) Month, Year: Controlled on production line:
ex) Monthly : ‘08’-> ‘08’
Year : ‘2007’-> ‘11’
(d) Model Name(Hex):
(e-1, e-2, f) Checksum
5. Substrate ADC Calibration
5.1. ADC Calibration Mode
(1) Adjustment of RF / AV
Model : 202 / Pattern : 65
(2) Adjustment of Component
Model : 215 / Pattern : 65
D-sub to D-sub DVI-D to HDMI or HDMI or HDMI
For HDMI EDID
For Analog EDID
No Item Content 16bit Data
1 Manufacturer ID GSM 1E6D
2 Product ID 22128(Analog) 5670
22129(HDMI) 5671
3 Year 2007 11
4 Version Analog : 1 01
Digital : 1
5 Revision Analog : 3
Digital : 3 03
6 Model Name M228WD-BZ
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D
0x01 01 03 08 2F 1E 78 EA AE C5 A2 57 4A 9C 25
0x02 12 50 54 A7 6B 80 95 0F 95 00 81 80 81 40 71 4F
0x03 01 01 01 01 01 01 7C 2E 90 A0 60 1A 1E 40 30 20
0x04 36 00 D9 28 11 00 00 1A 21 39 90 30 62 1A 27 40
0x05 68 B0 36 00 D9 28 11 00 00 1C 00 00 00 FD 00 38
0x06 4B 1E 53 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
0x07 00 4D 32 32 38 57 44 20 42 5A 0A 20 20 20 00 -1
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00 FF FF FF FF FF FF 00 1E 6D
0x01 01 03 80 2F 1E 78 0A AE C5 A2 57 4A 9C 25
0x02 12 50 54 A7 6B 80 71 4F 81 80 81 40 01 01 01 01
0x03 01 01 01 01 01 01 7C 2E 90 A0 60 1A 1E 40 30 20
0x04 36 00 D9 0A 11 00 00 1A 21 39 90 30 62 1A 27 40
0x05 68 B0 36 00 D9 0A 11 00 00 1C 00 00 00 FD 00 38
0x06 4B 1E 53 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
0x07 00 4D 32 32 38 57 44 2D 42 5A 0A 20 20 20 01 2
0x00 02 03 21 F1 4E 81 02 03 15 12 13 04 14 05 20 21
0x01 22 1F 10 23 09 07 07 83 01 00 00 65 03 0C 00 10
0x02 00 01 1D 00 80 51 D0 1C 20 40 80 35 00 BC 88 21
0x03 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 13
0x04 8E 21 00 00 18 02 3A 80 18 71 38 2D 40 58 2C 45
0x05 00 06 44 21 00 00 1E 01 1D 80 18 71 1C 16 20 58
0x06 2C 25 00 C4 8E 21 00 00 9E 4E 1F 00 80 51 00 1E
0x07 30 40 80 37 00 BC 88 21 00 00 18 00 00 00 00

- 15 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
(3) Adjustment of RGB
Model : 3 / Pattern : 65
6. ADC Calibration (The case where
does not become Substrate ADC
Calibration)
6.1. Adjustment of RF/AV
* Required Equipments
- Remote controller for adjustment
- MSPG-925FS Pattern Generator (Which has Video Signal
: 7 Color Bar Pattern shown in Fig. 1)
=> Model: 202 / Pattern: 65
(1) Method of Auto RF/AV Color Balance.(PAL_BGDHI)
1) Input the Video Signal : 7 Color Bar signal into AV1 or
AV2.
2) Set the PSM to Dynamic mode in the Picture menu.
[Fig.1]
3) Press IN-START key on R/C for adjustment.
4) Press the G(Vol.+) key to operate the set, then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
6.2. Adjustment of Component
* Required Equipments
- Remote controller for adjustment
- MSPG-925FS Pattern Generator (Which has 720p/50Hz
YPbPr output Pattern shown in Fig.2)
=> Model : 215 / Pattern : 65
(1) Method of Auto Component Color Balance
1) Input the Component 720p/50Hz 7 Color Bar(MSPG-
925FS model : 215, pattern : 65) signal into Component.
2) Set the PSM to Dynamic mode in the Picture menu
[Fig.2]
3) Press the IN-START key on R/C for adjustment.
4) Press the G (Vol.+) key to operate the set , then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
6.3 Adjustment of RGB
* Required Equipments
- Remote controller for adjustment
- MSPG-925F Pattern Generator
(Which has XGA [1024*768] 60Hz 8 Color Bar 100%
pattern shown in Fig.3)
(1) Method of Auto RGB Color Balance
1) Input the PC 1024x768@60Hz 7 Color Bar (MSPG-925F
model : 60, pattern : 65) signal into RGB (Using D-sub to
D-sub cable)
2) Set the PSM to Dynamic mode in Picture menu.
3) Press the IN-START key on R/C for adjustment
[Fig.3]
4) Press the G (Vol.+) key operate To set , then it becomes
automatically.
5) Auto-RGB OK means adjustment is completed.
* Before adjusting White-balance, the AV ADC should be
done.

- 16 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
7. White Balance
* Test Equipment
Color Analyzer (CA-210/CH.9)
-> When you adjust LCD color temperature, on Color
analyzer (CA-210), you should use Channel 9 which is
Matrix compensated (White, Red, Green, Blue revised) by
CS-1000 and adjust in accordance with White balance
adjustment coordinate which is specified on the next.
* Color temperature standards according to CSM and Module
Cool : 9,300k
Medium : 8,000k
Warm : 6,500k
* White balance adjustment coordinate and color temperature
- PC (for communication through RS-232C)
-> UART Baud rate : 115200 bps
- Luminance Y AV : upper 100 cd/m2(Typ : 250 cd/m2)
-> Applying to Cool, Medium, Warm mode
* Connecting picture of the measuring instrument (On
Automatic control )
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push control R/C IN-START
-> Enter the mode of White-Balance, the pattern will come
out.
* Auto adjustment Map (RS-232C)
* Auto-control interface and directions
1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10ux).
2) Adhere closely the Color Analyzer ( CA-210 ) to the
module less than 10cm distance, keep it with the surface
of the Module and Color Analyzer’s Prove
vertically.(80~100°).
3) Aging time
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 15 minutes.
- Using ‘no signal’or ‘full white pattern’or the others,
check the back light on.
7.1. Auto white Balance (Set:RS-232,
Host:PC, Baud Rate:115200bps,
Download:Cortez)
- Inside pattern is used when balance is controlled. Connect
as below figure and click the start button on W/B execution
program. W/B is automatically processing Cool -> Medium ->
Warm in order.
When W/B is completed, you can see ‘OK’on PC monitor.
7.2. Manual white Balance
- One of R Gain / G Gain / B Gain should be kept on 80, and
others are controlled lowering from 80
1) Press ‘power on’of the control R/C, set heat run to white by
pressing G, and heat run over 15 minutes. (Set : RS-233
Host : PC, Baud Rate : 115200bps, Download : Cortez)
2) Zero Calibrate CA-210, and when controlling, stick the
sensor to the center of LCD module surface.
3) Double click In-start key on Controlling R/C and get in
‘white balance’.
Cool CS-1000 CA-210(CH 9)
x 0.285 0.285±0.002
y 0.293 0.293±0.002
∆uv 0.000 0.000
Medium CS-1000 CA-210(CH 9)
x 0.295 0.295±0.002
y 0.305 0.305±0.002
∆uv 0.000 0.000
Warm CS-1000 CA-210(CH 9)
x 0.313 0.313±0.002
y 0.329 0.329±0.002
∆uv 0.004 0.004
<Fig. 2> Connecting picture (On Automatic Control)
Type LD73B
Baud Rate Data bit Stop bit Parity
115200 8 1 None
Index Cmd 1 Cmd 2 Data Min Value Max Value
R-Gain_Normal j a 00(00) 128(80)
G-Gain_Normal j b 00(00) 128(80)
B-Gain_Normal j c 00(00) 128(80)
R-Gain_Warm j d 00(00) 128(80)
G-Gain_Warm j e 00(00) 128(80)
B-Gain_Warm j f 00(00) 128(80)
R-Gain_Cool j g 00(00) 128(80)
G-Gain_Cool j h 00(00) 128(80)
B-Gain_Cool j i 00(00) 128(80)
R-Offset_Normal l j 00(00) 128(80)
G-Offset_Normal l k 00(00) 128(80)
B-Offset_Normal l l 00(00) 128(80)
R-Offset_Warm l m 00(00) 128(80)
G-Offset_Warm l n 00(00) 128(80)
B-Offset_Warm l o 00(00) 128(80)
R-Offset_Cool l p 00(00) 128(80)
G-Offset_Cool l q 00(00) 128(80)
B-Offset_Cool l r 00(00) 128(80)
Internal Pattern signal w b 00 Starting W/B ADJ
Internal Pattern signal w b 10 Using internal Pattern
Internal Pattern signal w b ff Ending W/B ADJ

- 17 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4) Set test-pattern on and display inside pattern. Control is
carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times.)
5) When the R/G/B GAIN is 80 on OSD, it is the FULL
DYNAMIC Range of the Module. In order to control white
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be kept
on 80, and other two is controlled lowering from 80.
* Color Temperature : Cool, Medium, Warm
1) When R GAIN is set to 80
- Control G GAIN and B GAIN by lowering from 80.
2) When B GAIN is set to 80
- Control R GAIN and G GAIN by lowering from 80.
3) When G GAIN is set to 80
- Control R GAIN and B GAIN by lowering from 80.
One of R Gain / G Gain / B Gain should be kept on 80,
and adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL DYNAMIC
Range of Module)
8. Set information(Serial No & Model name)
(1) Setting up like bottom figure (After setting white balance,
this is set)
(Press ADJ Key in the Adjust remocon.)
- Select “System Control 2”by using D/E(CH+/-) key, and
press A (ENTER).
Using Adjust remocon, RS-232 Host & Baud Rate &
Download value change (RS-232 Host : PC, Baud
Rate:115200bps, Download:Cortez)
(2) Bar-code scanning
1) Push the menu button in DTV mode.
Select the STATION -> Diagnostics -> To set
2) Check the Serial Number.
System Control 2
System 4-SYS
Spread En On
RS-232 Host PC
Baud rate 115200bps
Download Cortez
AGC-L 0140
Audio Delay 0
DVI EQ 2
EQ Gain OFF
10% Dimming OFF
LD73D
Cortez 2.00
Sti 5100 4.17
UTT 0
------------------------------------------
Tool Option 1 196
Tool Option 2 65
Area Option 3 0
OPTION 1 14
2
1
OPTION 2
OPTION 3
OPTION 4 192
System Control 1
System Control 2
System Control 3
BlkLine Detector
Power-off History
Panel Control
Fan Control
Channel Recover

- 18 -
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

- 19 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TROUBLESHOOTING
1. Power Board
1-1. The full flowchart for the voltage output
Start check
Manufacture’s model
passage
1. Check the Power Off
status.
Does the whole
screen appear?
Is it
identical to when the
power is off?
No
Yes
No
Yes
Yes
Yes
Yes
2. Check the Interface
signal status.
Is the Interface
signal operating?
Yes
3. Check the St-by 5V
signal circuit.
Does the
low pressure output
appear?
Does the
St-by 5V signal
appear?
No
No
Yes
4. Check the 5V Monitor
signal circuit.
Does the
5V Monitor signal
appear?
No
7. Check the VSC Vs-ON
signal
Does the
high tension output
appear?
Does the
VSC signal Vs-ON
appear?
No
No
Does the
high tension
output voltage
occur?
When
removing the Y B/D
Module input connector,
does output voltage
drop?
When the
Y, Z B/D Module
input connector, does Power
Board high tension
output voltage drop?
No No No
9. Check the Power
Board Output high
tension circuit
Yes
10. Check the Z B/D
Module output circuit
Yes
When
removing the Z B/D
Module input connector,
does output voltage
drop?
11. Check the Y B/D
Module output circuit
Yes
Yes
8. Check the Vs, Va
voltage output circuit.
Does the
Vs, Va voltage output
appear?
No
Yes
Yes
5. Check the VSC RL-ON
signal.
Does the
VSC signal RL-ON
appear?
No
6. Check the VSC low
pressure output
Does the
VSC low pressure
output appear?
No

- 20 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. No Power
(1) Symptom
1) Does not minute discharge at module.
2) Non does not come into the front LED.
(2) Procedure check
Is the power cord plugged in? Plug in the power cord.
Yes
No
Is the Line Filter and Power
Board Cable connected? Connect the Cable.
Yes
No
Is the appropriate Fuse(F101) on
the Power Board? Replace the Fuse.
Yes
No
Is the Power Board and 13P of
VSC Board Cable connected? Connect the Cable.
Yes
No
After removing the cables, connect them to the Power Board(except the
SC101 connection cable), and change the AC voltage marking to manual.
When ST-BY 5V does not operate, replace the Power Board.