LG 22LG3000 User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LD84A
MODEL : 22LG3000 22LG3000-ZA
MODEL : 22LG3010 22LG3010-ZB
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only

Copyright©2008 LG Electronics.Inc.All right reserved - 2 - LGE Internal Use Only
Only for training and service purposes
CONTENTS
CONTENTS ......................................................................................................................................2
PRODUCT SAFETY .......................................................................................................................3
SPECIFICATION ...............................................................................................................................6
DOWNLOAD METHOD...................................................................................................................11
ADJUSTMENT INSTRUCTION.......................................................................................................21
TROUBLE SHOOTING ................................................................................................................23
BLOCK DIAGRAM.........................................................................................................................27
EXPLODED VIEW ...............……………………………................................................................... 29
REPLACEMENT PARTS LIST ............................…...............……………………………................ 32
SVC. SHEET .................................................................................................................................

LGE Internal Use OnlyCopyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 3 -
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 Exploded View.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩ and 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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SERVICING PRECAUTIONS
ٛ.

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SPECIFICATION
NOTE: Specifications and others are subject to change without notice for improvement.
1. Application range
1.1 This spec sheet is applied all of the 22" LCD TV
1.2 Not included spec and each product spec in this spec sheet apply correspondingly to the following each country
standard and requirement of Buyer
2. Specification
Each part is tested as below without special appointment.
2.1 Temperature: 25±5 °C
2.2 Relative Humidity: 10 to 90%
2.3 Power Voltage: input voltage (90 ~ 264 V，50/60 Hz ±3 Hz)
* Standard Voltage of each product is marked by models
2.4 Specification and performance of each parts are followed each drawing and specification by part number in
accordance with BOM.
2.5 The receiver must be operated for about 30 minutes prior to the adjustment.
3. General Specification (TV)
No Item Specification
1 Receiving system PAL /SECAM
2 Input voltage AC 90 ~ 264 V/ 50,60 Hz
3 Market Europe
4 Screen size 22 inch wide
5 Aspect Ratio 16:9
6 LCD Module M220Z1-L03 CMO
7 Operating Environment Temp: 5 ~ 35 deg Humidity: 10 to 90%
8 Storage Environment Temp:-20 ~ 50 deg Humidity: 10 to 90%
9 Input Signal D-sub / Composite / S-Video / Component / SCART / HDMI / CI Slot /
SPDIF
10 Power consumption
Normal on < 65 W ( Depend on screen size )
Standby < 1W at 240Vac mains, RC standby mode.
Switch off < 1W at 240Vac mains, RC in-active
6. Vertical refresh rate 56 - 75 Hz
7. Horizontal frequency 31 - 75 KHz

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4. Optical Feature
22″LCD Module-CMO
5. External Input Format
5-1. RGB Input
2 LED colors Blue/Red for Power on / sleeping / switch off
Preset timings are as below
No Resolution H-freq(kHz) V-freq.(Hz) Pixel
clock(MHz) Proposed Remarks
1. 720*400 31.468 70.08 28.321
2. 640*480
31.469
37.684
59.94
75.00
25.17
31.50 VESA
Input 848*480
60Hz, 852*480
60Hz
Î640*480 60Hz
Display
3 800*600
37.879
46.875
60.31
75.00
40.00
49.50 VESA
4. 832*624 49.725 74.55 57.283 Macintosh
5 1024*768
48.363
56.470
60.123
60.00
70.00
75.029
65.00
75.00
78.75
VESA(XGA)
6 1152*864 75 WXGA
7 1280*720 60 WXGA
8 1280X800 75 WXGA
9 1280X1024 60 WSXGA
10 1280X1024 75 WSXGA

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No Resolution H-freq(kHz) V-freq.(Hz) Pixel
clock(MHz) Proposed Remarks
11 1680*1050 65.16 59.94 147.00 WSXGA
* RGB-PC EDID DATA
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 00 22 40 E2 01 00
10 04 12 01 03 1C 2F 1E 78 2A 78 F5 A6 55 48 9B 26
20 12 50 54 A5 6F 00 71 4F 81 C0 81 80 01 01 01 01
30 01 01 01 01 01 01 21 39 90 30 62 1A 27 40 68 B0
40 36 00 D6 2C 11 00 00 1C 02 3A 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FC 00 32
60 32 4C 47 33 30 30 30 0A 20 20 20 20 00 00 00 FD
70 00 38 4E 1F 50 11 00 0A 20 20 20 20 20 20 00 FF
5-2. HDMI mode
HDMI video input should support timings defined in CEA 861-B specification with extended EDID blocks
Timing requirements
No Resolution H-freq(kHz) V-freq.(kHz) Pixel
clock(MHz) Proposed Remarks
1 640*480 60 SDTV 480P 4:3
2 720*480 15.734 / 15.6 59.94 / 60 27.00 SDTV 480P 4:3
3 720*480 31.469 / 31.5 59.94 / 60 27.00/27.03 SDTV 480P 16:9
4 720*576 15.625 50 27(54) SDTV 576I 4:3
5 720*576 31.25 50 54 SDTV 576P 16:9
6 1280*720 37.500 50 74.25 HDTV 720P
7 1280*720 44.96 / 45 59.94 / 60 74.17/74.25 HDTV 720P
8 1920*1080 33.72 / 33.75 59.94 / 60 74.17/74.25 HDTV 1080I
9 1920*1080 28.125 50.00 74.25 HDTV 1080I
10 1920*1080 26.97 / 27 23.97 / 24 74.17/74.25 HDTV 1080P
11 1920*1080 25 74.25 HDTV 1080P
12 1920*1080 33.716 /
33.75
29.976 /
30.00
74.25 HDTV 1080P
13 1920*1080 56.250 50 148.5 HDTV 1080P
14 1920*1080 67.43 / 67.5 59.94 / 60 148.35/148.50 HDTV 1080P

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HDMI is major for video input. It also can support RGB mode on above timing.(Just only rear HDMI) The video mode is
first priority. RGB timing is design in. The color temperature value will copy from TV mode, no need to check
No Resolution H-freq(kHz) V-freq.(Hz) Pixel
clock(MHz) Proposed Remarks
1. 720*400 31.468 70.08 28.321
2. 640*480 31.469
37.684
59.94
75.00
25.17
31.50 VESA
Input 848*480 60Hz, 852*480
60Hz
Î640*480 60Hz Display
3 800*600 37.879
46.875
60.31
75.00
40.00
49.50 VESA
4. 832*624 49.725 74.55 57.283 Macintosh
5 1024*768
48.363
56.470
60.123
60.00
70.00
75.029
65.00
75.00
78.75
VESA(XGA)
6 1152*864 75 WXGA
7 1280*720 60 WXGA
8 1280X800 75 WXGA
9 1280X1024 60 WSXGA
10 1280X1024 75 WSXGA
11 1680*1050 65.16 59.94 147.00 WSXGA
* HDMI EDID DATA
HDMI1 on the Side
Block 0
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 00 22 01 01 01 01
10 04 12 01 03 80 2F 1E 78 2A 78 F5 A6 55 48 9B 26
20 12 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
30 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28
40 55 00 C4 8E 21 00 00 1E 00 00 00 FF 00 31 31 31
50 31 31 31 31 31 31 31 31 31 31 00 00 00 FD 00 38
60 4E 1E 50 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 32 32 4C 47 33 30 30 30 0A 20 20 20 20 01 A1
Block 1
00 02 03 21 F1 4E 81 02 03 15 12 13 04 14 05 20 21
10 22 1F 10 23 15 07 50 83 01 00 00 65 03 0C 00 20
20 00 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 34 CD 31
30 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 34
40 CD 31 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55
50 00 34 CD 31 00 00 1E 01 1D 80 D0 72 1C 16 20 10
60 2C 25 80 34 CD 31 00 00 9E 8C 0A D0 90 20 40 31
70 20 0C 40 55 00 34 CD 31 00 00 18 00 00 00 00 F5

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HDMI2 on the Rear Cover
Block 0
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 00 22 01 01 01 01
10 04 12 01 03 80 2F 1E 78 2A 78 F5 A6 55 48 9B 26
20 12 50 54 A5 6F 00 71 4F 81 C0 81 80 01 01 01 01
30 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28
40 55 00 C4 8E 21 00 00 1E 21 39 90 30 62 1A 27 40
50 68 B0 36 00 AE 0E 11 00 00 1C 00 00 00 FD 00 38
60 4E 1E 50 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 32 32 4C 47 33 30 30 30 0A 20 20 20 20 01 D9
Block 1
00 02 03 21 F1 4E 81 02 03 15 12 13 04 14 05 20 21
10 22 1F 10 23 15 07 50 83 01 00 00 65 03 0C 00 10
20 00 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 34 CD 31
30 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 34
40 CD 31 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55
50 00 34 CD 31 00 00 1E 01 1D 80 D0 72 1C 16 20 10
60 2C 25 80 34 CD 31 00 00 9E 8C 0A D0 90 20 40 31
70 20 0C 40 55 00 34 CD 31 00 00 18 00 00 00 00 05
6. Mechanical specification
22LG3000
NO. Item Content Unit Remark
Width(W) Length(L) Height(H) mm
Before packing 522.2 189.2 431.4 mm With Stand
1 Product
Dimension
After packing 603 163 471 mm Box Out Size
Only Set 5.4 kg
2 Product
With Box 7.6 kg

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Download Method
1. How to Enter the Service Menu
1) Turn on the TV set.
2) After displaying, press ‘Menu’ key.
3) Press ‘0’ key (Number key ‘zero’) four times slowly.
4) Showing the Service Menu.
2. F/W Download Method
Please refer to the attached F/W download SOP file: “S/W download SOP”, MTK Tool, S/W.
Connect the serial cable from PC RS232 port to TV RS-232 port.
1) Run the MTK tool (as picture 1), and select “MTK 538*”, “COM 1”.
2) Press the “Browse”, and select the correct S/W. (as picture 2, e.g.L32W981 bin path)
3) Press “Upgrade” to start S/W upgrade. (can’t in PC mode, can’t plug off when upgrade)
4) When it displays 100% finished, it is OK (about 10 minutes). (as picture 3)
5) After download the S/W, press “MENU+1999” to reset the TV.
Picture 1
Picture 2

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Picture 3
3. EDID Download Method
1) System Connection
Tool list: 715G2005-C 1PCS
Printercable 1PCS
12V ADAPTER 1PCS
DVI-HDMIcable 1PCS
VGAcable 1PCS
This system should be connected as shown below
EDID JIG (LGE P/No. : AGF73711301)
P/No. : AGF73711301

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This system should be connected as shown below
Note: Do not connect VGA and DVI-HDMI cable with ISP board at the same time
DDC connect for HDMI (DVI-HDMI cable) DDC connect for VGA
2) Preparations
Running Port95nt.exe to install Driver LINK Port I/O Driver, and restart PC. (as picture 4)
Picture 4
Connect to PC Connect to TV
HDMI port
12V
Connect to
TV VGA port

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Check the TV model name, find the corresponding EDID date (as picture 5)
Picture 5
Turn on TV, press “menu”+1998 to enter EDID ISP mode. you will see the following menu. And then EDID ISP mode on,
if this menu disappear, EDID ISP mode will turn off automatically.

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3) VGA EDID update
①Open the VGA file, and running WinDDC.exe, you will see the following table (e.g.19LG3000)
②Check the connection below is right, and TV should in EDID ISP mode, if the EDID ISP mode menu disappear
please enter it again.
Connect to PC
Connect to
TV VGA port
12V

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③Click “Write EDID”, appear the dialog box. Key in correct serial number according to rating label of back cover, and
click “OK” (as picture 6)
Picture 6
④Appear “write ok” on the screen that indicate you are successful to write.
Click here
Key in correct
serial numbe
r

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⑤Appear “IIC Communication Error” on the screen that indicate fail to write. Please check whether the connection is
OK and whether the EDID ISP mode menu is disappear.
4). HDMI EDID update
Notice: Please write or read the VGA EDID firstly by Winddc.exe
①Open the HDMI file, and running DDC20.exe, you will see the following DOS table. (e.g.19LG3000)

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②Check the connection below is right, and TV should in EDID ISP mode, if the EDID ISP mode menu disappear
please enter it again.
③“1” means write. “2” means read. Key in “2” and press “Enter” on keyboard can read the HDMI EDID date of this TV.
Key in “1” and press “Enter” can update HDMI EDID date, key in correct serial number according to rating label of back
cover, and press “Enter” (as picture 7)
Picture 7
Connect to PC Connect to TV
HDMI port
12V
Key in “1” and
p
ress “Enter”
Key in correct
serial numbe
r

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④If the screen shows “data compare OK”, it means the EDID writing process is OK. Press “Ctrl”+ “C”to exit
DOS mode.
⑤If the screen shows as below, it means the EDID writing process is fail. Please check whether the connection is OK
and whether the EDID ISP mode menu is disappear.

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4. Serial Number Download Method
Please refer to the attached Serial number scan file: “Scan serial number SOP” and “LG Serial Number”.
Connect the serial cable from PC RS232 port to TV RS-232 port.
1) Open the program “WBadjust.exe”, press the “Config” option, if serial port displays fail (as picture 8), then you must
check whether Com2 exist. After that press the “Program” option to start scanning serial number process.
2) If adjust successfully, display ; If adjust fail, display .
Picture 8