LG 55G2 User manual

Printed in KoreaP/NO : MFL67366702 (1203-REV00)
CHASSIS : LA23G
MODEL : 55G2 55G2-UG
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED LCD TV
SERVICE MANUAL
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only

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Only for training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ................................................................................. 3
SPECIFICATION ....................................................................................... 4
ADJUSTMENT INSTRUCTION .............................................................. 10
SCREW ASSEMBLY WORKING GUIDE ............................................... 19
EXPLODED VIEW .................................................................................. 20
SCHEMATIC CIRCUIT DIAGRAM ..............................................................

- 3 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
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 1 W), keep the resistor 10 mm 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 1 MΩand 5.2 MΩ.
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 1.5 K / 10 watt resistor in parallel with a 0.15 uF 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
0.5 mA.
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
IMPORTANT SAFETY NOTICE
SAFETY PRECAUTIONS

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Only for training and service purposes
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This spec sheet is applied LCD TV with (LA23G) chassis
2. Test condition
Each part is tested as below without special notice.
1) Temperature : 25 ºC ± 5 ºC (77±9 ºF ), CST : 40±5 ºC
2) Relative Humidity: 65 % ± 10 %
3) Power Voltage
- AC 100-240 V~, 50/60 Hz
* Standard Voltage of each products is marked by models.
4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
5) The receiver must be operated for about 5 minutes prior to
the adjustment.
3. Test method
1) Performance: LGE TV test method followed
2) Demanded other specification
- Safety : UL, CSA, CE, IEC specification
- EMC: FCC, ICES, CE, IEC specification
- Wireless : WirelessHD Specification (Option)
4. General Specification
No Item Specication Remark
1 Market 1) North America
2 Broadcasting System 1) ATSC / NTSC
3 Receiving System 1) VSB/64 & 256 QAM/ NTSC-M
4 Input Voltage AC 100 ~ 240V 50/60Hz FHD + T120Hz
5 Available Channel 1) VHF : 02~13
2) UHF : 14~69
3) DTV : 02-69
4) CATV : 01~135
5) CADTV : 01~135
6 Screen Size 47/55 inche Wide(1920 × 1080)
7 Aspect Ratio 16:9
8 Tuning System FS
9 LCD Module LC470EUE-SEF1 Edge LED Module T120Hz V12
LC550EUE-SEF1 Edge LED Module T120Hz V12
10 Operating Environment 1) Temp : 0 ~ 40 deg
2) Humidity : ~ 80 %
11 Storage Environment 1) Temp : -20 ~ 60 deg
2) Humidity : ~ 85 %

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5. External input format
5.1. 2D mode
5.1.1. Component input (Y, CB/PB, CR/PR)
5.1.2. RGB Input (PC)
No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock Proposed
1. 720*480 15.73 60.00 13.5135 SDTV ,DVD 480I
2. 720*480 15.73 59.94 13.50 SDTV ,DVD 480I
3. 720*480 31.50 60.00 27.027 SDTV 480P
4. 720*480 31.47 59.94 27.00 SDTV 480P
5. 1280*720 45.00 60.00 74.25 HDTV 720P
6. 1280*720 44.96 59.94 74.176 HDTV 720P
7. 1920*1080 33.75 60.00 74.25 HDTV 1080I
8. 1920*1080 33.72 59.94 74.176 HDTV 1080I
9. 1920*1080 67.50 60.00 148.50 HDTV 1080P
10. 1920*1080 67.432 59.94 148.352 HDTV 1080P
11. 1920*1080 27.00 24.00 74.25 HDTV 1080P
12. 1920*1080 26.97 23.94 74.176 HDTV 1080P
13. 1920*1080 33.75 30.00 74.25 HDTV 1080P
14. 1920*1080 33.71 29.97 74.176 HDTV 1080P
No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock Proposed
1 640*350 31.468 70.09 25.17 EGA Х
2 720*400 31.469 70.08 28.32 DOS O
3 640*480 31.469 59.94 25.17 VESA(VGA) O
4 800*600 37.879 60.31 40.00 VESA(SVGA) O
5 1024*768 48.363 60.00 65.00 VESA(XGA) O
6 1360*768 47.712 60.015 85.50 VESA (WXGA) Х
7 1920*1080 67.5 60 148.8 WUXGA
(Reduced Blanking)
O

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5.1.3. HDMI Input 1 (PC/DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed
HDMI-PC
1 640*350 31.468 70.09 25.17 EGA Х
2 720*400 31.469 70.08 28.32 DOS O
3 640*480 31.469 59.94 25.17 VESA(VGA) O
4 800*600 37.879 60.31 40.00 VESA(SVGA) O
5 1024*768 48.363 60.00 65.00 VESA(XGA) O
6 1360*768 47.712 60.015 85.50 VESA (WXGA) O
7 1280*1024 63.981 60.020 108.00 VESA (SXGA) O
8 1920*1080 67.5 60 148.5 HDTV 1080P O
HDMI-DTV
1 720*480 31.50 60.00 27.027 SDTV 480P
2 720*480 31.47 59.94 27.00 SDTV 480P
3 1280*720 45.00 60.00 74.25 HDTV 720P
4 1280*720 44.96 59.94 74.176 HDTV 720P
5 1920*1080 33.75 60.00 74.25 HDTV 1080I
6 1920*1080 33.72 59.94 74.176 HDTV 1080I
7 1920*1080 67.50 60.00 148.50 HDTV 1080P
8 1920*1080 67.432 59.94 148.352 HDTV 1080P
9 1920*1080 27.00 24.00 74.25 HDTV 1080P
10 1920*1080 26.97 23.976 74.176 HDTV 1080P
11 1920*1080 33.75 30.00 74.25 HDTV 1080P
12 1920*1080 33.71 29.97 74.176 HDTV 1080P

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5.2. 3D mode
5.2.1. RF Input
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1 1920*1080 45 60 74.25 HDTV 1080I Side by Side, Top & Bottom
2 1280*720 45 60 74.25 HDTV 720P Side by Side, Top & Bottom
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Remark
1 1280*720p 45.00 60.00 74.25 Side by Side , Top & Bottom,
Single Frame Sequential
2 1920*1080i 33.75 60.00 74.25 Side by Side , Top & Bottom
3 1920*1080p 67.50 60.00 148.50 Side by Side , Top & Bottom
Checkerboard, Single Frame Sequential
Row Interleaving, Column Interleaving
4 1920*1080p 27.00 24.000 74.25 Side by Side , Top & Bottom
Checkerboard
5 1920*1080p 33.75 30.000 74.25 Side by Side, Top & Bottom
Checkerboard
5.2.5. HDMI 1.3(3D supported mode manually)
5.2.2. USB Input
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1 1920*1080 33.75 30.00 74.25 HDTV 1080p Side by Side, Top & Bottom,
Checkerboard
5.2.3. HDMI-PC Input Input
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Remark
1 1024*768 48.363 60.004 65.000 Side by Side , Top & Bottom
2 1280*768 47.776 59.870 79.500 Side by Side , Top & Bottom
3 1360*768 47.712 60.015 85.500 Side by Side , Top & Bottom
4 1280*720 45.00 60.00 74.25 Side by Side , Top & Bottom,
Single Frame Sequential
5 1920*1080 67.50 60.00 148.50 Side by Side , Top & Bottom
Checkerboard, Single Frame Sequential
Row Interleaving, Column Interleaving
5.2.4. RGB-PC Input
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Remark
1 1920*1080 67.5 60.000 148.5 Side by Side , Top & Bottom
2 1280*720 45.000 60.000 74.250 Side by Side , Top & Bottom
3 1360*768 47.712 60.015 85.50 Side by Side , Top & Bottom
4 1280*768 47.776 59.870 79.500 Side by Side , Top & Bottom
5 1024*768 48.363 60.00 65.00 Side by Side , Top & Bottom

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5.2.6. HDMI 1.4a(3D supported mode automatically)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1 1280*720p 89.91 / 90.00 59.94 / 60.00 148.35 / 148.50 Mandatory Frame Packing,
2 1280*720p 44.96 / 45.00 59.94 / 60.00 74.18 / 74.25 Mandatory Top & Bottom
3 1920*1080i 33.72 / 33.75 59.94 / 60.00 74.18 / 74.25 Mandatory Side by Side (Half)
4 1920*1080p 43.94 / 54.00 23.97 / 24.00 148.35 / 148.50 Mandatory Frame Packing,
5 1920*1080p 26.97 / 27.00 23.97 / 24.00 74.18 / 74.25 Mandatory Top & Bottom
6 1280*720p 44.96 / 45.00 59.94 / 60.00 74.18 / 74.25 Primary Side by Side (Half)
7 1920*1080i 67.432 / 67.50 59.94 / 60.00 148.35 / 148.50 Primary Frame Packing
8 1920*1080p 67.43 / 67.50 59.94 / 60.00 148.35 / 148.50 Primary Top & Bottom
9 1920*1080p 26.97 / 27.00 23.97 / 24.00 74.18 / 74.25 Primary Side by Side (Half)
10 1920*1080p 67.432 / 67.50 29.976 / 30.00 148.35 / 148.50 Primary Frame Packing,
11 1920*1080p 33.716 / 33.75 29.976 / 30.00 74.18 / 74.25 Primary Top & Bottom
12 1920*1080i 33.72 / 33.75 59.94 / 60.00 74.18 / 74.25 Secondary Top & Bottom
13 1920*1080p 67.43 / 67.50 59.94 / 60.00 148.35 / 148.50 Secondary Side by Side (Half)
14 1920*1080p 33.716 / 33.75 29.976 / 30.00 74.18 / 74.25 Secondary Side by Side (Half)
15 720*480p 62.938 / 63.00 59.94 / 60.00 54.00 / 54.054 Secondary (16:9) Frame Packing,
16 720*480p 31.469 / 31.50 59.94 / 60.00 27.00 / 27.027 Secondary (16:9) Top & Bottom
17 720*480p 31.469 / 31.50 59.94 / 60.00 27.00 / 27.027 Secondary (16:9) Side by Side (Half)
18 720*480p 62.938 / 63.00 59.94 / 60.00 54.00 / 54.054 Secondary (4:3) Frame Packing,
19 720*480p 31.469 / 31.50 59.94 / 60.00 27.00 / 27.027 Secondary (4:3) Top & Bottom
20 720*480p 31.469 / 31.50 59.94 / 60.00 27.00 / 27.027 Secondary (4:3) Side by Side (Half)
21 640*480p 62.938 / 63.00 59.94 / 60.00 50.35 / 50.40 Secondary Frame Packing,
22 640*480p 31.469 / 31.50 59.94 / 60.00 25.175 / 25.20 Secondary Top & Bottom
23 640*480p 31.469 / 31.50 59.94 / 60.00 25.175 / 25.20 Secondary Side by Side (Half)
24 1280*720p 89.91 / 90.00 59.94 / 60.00 148.35 / 148.50 Line Alternative
25 1280*720p 44.96 / 45.00 59.94 / 60.00 148.35 / 148.50 Side by Side (Full)
26 1920*1080i 67.432 / 67.50 59.94 / 60.00 148.35 / 148.50 Field Alternative
27 1920*1080i 33.72 / 33.75 59.94 / 60.00 148.35 / 148.50 Side by Side (Full)
28 1920*1080p 43.94 / 54.00 23.97 / 24.000 148.35 / 148.50 Line Alternative
29 1920*1080p 26.97 / 27.00 23.97 / 24.000 148.35 / 148.50 Side by Side (Full)
30 1920*1080p 67.432 / 67.50 29.976 / 30.00 148.35 / 148.50 Line Alternative
31 1920*1080p 33.716 / 33.75 29.976 / 30.00 148.35 / 148.50 Side by Side (Full)
32 720*480p 62.938 / 63.00 59.94 / 60.00 54.00 / 54.054 16:9 Line Alternative
33 720*480p 31.469 / 31.50 59.94 / 60.00 54.00 / 54.054 16:9 Side by Side (Full)
34 720*480p 62.938 / 63.00 59.94 / 60.00 54.00 / 54.054 4:3 Line Alternative
35 720*480p 31.469 / 31.50 59.94 / 60.00 54.00 / 54.054 4:3 Side by Side (Full)
36 640*480p 62.938 / 63.00 59.94 / 60.00 50.35 / 50.40 Line Alternative
37 640*480p 31.469 / 31.50 59.94 / 60.00 50.35 / 50.40 Side by Side (Full)

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5.3. 2D to 3D Mode
- Remark: 3D Input mode
No. Side by Side Top & Bottom Checkerboard Single Frame
Sequential
Frame Packing Line
Interleaving
Column
Interleaving
1
R
L
R
LLLLL
L
R
L
5.2.7. Component Input
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1 1280*720 44.96 59.94 74.176 HDTV 720P Side by Side, Top & Bottom
2 1920*1080 33.75 60.00 74.25 HDTV 1080I Side by Side, Top & Bottom
3 1920*1080 33.72 59.94 74.176 HDTV 1080I Side by Side, Top & Bottom
4 1920*1080 67.500 60 148.50 HDTV 1080P Side by Side, Top & Bottom
5 1920*1080 67.432 59.94 148.352 HDTV 1080P Side by Side, Top & Bottom
6 1920*1080 27.000 24.000 74.25 HDTV 1080P Side by Side, Top & Bottom
7 1920*1080 26.97 23.976 74.176 HDTV 1080P Side by Side, Top & Bottom
8 1920*1080 33.75 30.000 74.25 HDTV 1080P Side by Side, Top & Bottom
9 1920*1080 33.71 29.97 74.176 HDTV 1080P Side by Side, Top & Bottom

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ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet applies to L9(LG1152) Chassis applied LCD
TV all models manufactured in TV factory
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 protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25 ±5 °C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 100~240V,
50/60Hz.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15 °C
In case of keeping module is in the circumstance of 0°C, it
should be placed in the circumstance of above 15°C for 2
hours
In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above
15°C for 3 hours.
[Caution]
When still image is displayed for a period of 20 minutes or
longer (especially where W/B scale is strong.
Digital pattern 13ch and/or Cross hatch pattern 09ch), there
can some afterimage in the black level area
3. Adjustment items
3.1. Final assembly adjustment
▪ EDID/DDC check
▪ White Balance adjustment
▪ ADC Adjustment check
▪ RS-232C functionality check
▪ Factory Option setting per destination
▪ Ship-out mode setting (In-Stop)
3.2. Etc
▪ Ship-out mode
▪ Tool option menu
▪ USB Download(S/W Update, Option, Service only)
3.3. Automatic Adjustment
3.3.1. Overview
ADC adjustment is needed to find the optimum black level and
gain in Analog-to-Digital device and to compensate RGB
deviation
3.3.2. Equipment & Condition
1) Jig (RS-232C protocol)
2) Inner Pattern
- Resolution : 1080p (Inner Pattern)
- Resolution : 1024*768 RGB (Inner Pattern)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
3.3.3 Adjustment
3.3.3.1. Adjustment method
▪ Using RS-232, adjust items listed in 3.1 in the other shown in
“4.1.3.3”
3.3.3.2. Adj. protocol
3.3.3.3 Adj. order
▪ aa 00 00 [Enter ADC adj. mode]
▪ xb 00 40 [Change input source to Component1(480i)]
▪ ad 00 10 [Adjust 480i Comp1]
▪ xb 00 60 [Change input source to RGB(1024*768)]
▪ ad 00 10 [Adjust 1024*768 RGB]
▪ ad 00 90 End adj.
Ref) ADC adj. RS232C Protocol_Ver1.0
Protocol Command Set ACK
Enter adj. mode aa 00 00 a 00 OK00x
Source change xb 00 40
xb 00 60
b 00 OK40x (Adjust 480i Comp1 )
b 00 OK60x (Adjust 1024*768 RGB)
Begin adj. ad 00 10
Return adj. result OKx (Case of Success)
NGx (Case of Fail)
Read adj. data (main)
ad 00 20
(sub )
ad 00 21
(main)
000000000000000000000000007c007b006dx
(Sub)
000000070000000000000000007c00830077x
Conrm adj. ad 00 99 NG 03 00x (Fail)
NG 03 01x (Fail)
NG 03 02x (Fail)
OK 03 03x (Success)
End adj. aa 00 90 a 00 OK90x

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4. Manual Adjustment
4.1. MAC Address, ESN Key and Widevine
Key download
4.1.1. Equipment & Condition
1) Play file: keydownload.exe
4.1.2. Communication Port connection
1) Key Write: Com 1,2,3,4 and 115200 (Baudrate)
2) Barcode: Com 1,2,3,4 and 9600 (Baudrate)
4.1.3. Download process
1) Select the download items.
2) Mode check: Online Only
3) Check the test process
- US, Canada models: DETECT -> MAC_WRITE ->
WIDEVINE_WRITE
- Korea, Mexico models: DETECT -> MAC_WRITE ->
WIDEVINE_WRITE
4) Play : START
5) Check of result: Ready, Test, OK or NG
6) Printer out (MAC Address Label)
4.1.4. Communication Port connection
1) Connect: PCBA Jig -> RS-232C Port == PC -> RS-232C
Port
4.1.5. Download
1) US, Canada, Mexico models (12Y LCD TV + MAC +
Widevine + ESN Key)
2) Korea, Mexico models (11Y LCD TV + MAC + Widevine
Only)
4.1.6. Inspection
- In INSTART menu, check these keys.

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4.2. PING Test
* LAN card can be verified by using PING test
4.2.1 Adjustment Method(Board)
(1) Connect LAN to the board and power on.
(Default IP can be set to automatic setting. When power
ON, IP can be automatically be achieved from the router)
(2) Press ADJ key in the adjustment remote control.
(3) Check Network status by pressing 13. ACAP PING TEST
in EZ ADJUST. If it operates properly, it will show “Network
is operating properly.” If it does not, it will show “Network is
not working properly.”
4.2.2 Adjustment Method(Manufacturer)
(4) Connect the PC with PING Test program installed and the
LAN port of the SET via Cross LAN Cable. (The IP setting
of the PC has to be 12.12.2.3)
(5) After the PING Test program has been executed, check the
program setting. (IP of the set will be 12.12.2.2. Double
check the setting. Do not check the Modem because it will
not be used.)
(6) Press the Power Only Key in Adjustment remote control.
(IP of the set will be set)
(7) Upon pressing “RUN” in the program, it will show “OK” or
“NG” according to the test result.
● After all the adjustments, to disable the IP setting, press
INSTOP key.
4.3 EDID Download
4.3.1 Overview
▪ It is a VESA regulation. A PC or a MNT will display an optimal
resolution through information sharing without any necessity
of user input. It is a realization of “Plug and Play”.
4.3.2 Equipment
▪ Since embedded EDID data is used, EDID download JIG,
HDMI cable and D-sub cable are not need.
▪ Adjust remocon
4.3.3 Download method
1) Press Adj. key on the Adj. R/C,
2) Select EDID D/L menu.
3) By pressing Enter key, EDID download will begin
4) If Download is successful, OK is display, but If Download is
failure, NG is displayed.
5) If Download is failure, Re-try downloads.
※Caution) When EDID Download, must remove RGB/HDMI
Cable.
4.3.3.1. EDID DATA
# HDMI 1(C/S : 43 30)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 16 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1F 52 10 00 0A 20 20 20 20 20 20 00 00 00 FC
70 | 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 43
EDID Block 1, Bytes 128-255 [80H-FFH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 2E F1 48 90 22 20 05 04 03 02 01 23 09 57
10 | 07 78 03 0C 00 10 00 B8 2D 20 C0 0E 01 4F 00 FE
20 | 08 10 06 10 18 10 28 10 38 10 E3 05 00 00 02 3A
30 | 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E
40 | 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A 00 00
50 | 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 A0 5A
60 | 00 00 00 1E 26 36 80 A0 70 38 1F 40 30 20 25 00
70 | A0 5A 00 00 00 1A 00 00 00 00 00 00 00 00 00 30

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# HDMI 2(C/S : 43 20)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 16 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1F 52 10 00 0A 20 20 20 20 20 20 00 00 00 FC
70 | 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 43
EDID Block 1, Bytes 128-255 [80H-FFH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 2E F1 48 90 22 20 05 04 03 02 01 23 09 57
10 | 07 78 03 0C 00 20 00 B8 2D 20 C0 0E 01 4F 00 FE
20 | 08 10 06 10 18 10 28 10 38 10 E3 05 00 00 02 3A
30 | 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E
40 | 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A 00 00
50 | 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 A0 5A
60 | 00 00 00 1E 26 36 80 A0 70 38 1F 40 30 20 25 00
70 | A0 5A 00 00 00 1A 00 00 00 00 00 00 00 00 00 20
# HDMI 3(C/S : 43 10)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 16 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1F 52 10 00 0A 20 20 20 20 20 20 00 00 00 FC
70 | 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 43
EDID Block 1, Bytes 128-255 [80H-FFH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 2E F1 48 90 22 20 05 04 03 02 01 23 09 57
10 | 07 78 03 0C 00 30 00 B8 2D 20 C0 0E 01 4F 00 FE
20 | 08 10 06 10 18 10 28 10 38 10 E3 05 03 01 02 3A
30 | 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E
40 | 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A 00 00
50 | 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 A0 5A
60 | 00 00 00 1E 26 36 80 A0 70 38 1F 40 30 20 25 00
70 | A0 5A 00 00 00 1A 00 00 00 00 00 00 00 00 00 10
# HDMI 4(C/S : 43 00)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 16 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1F 52 10 00 0A 20 20 20 20 20 20 00 00 00 FC
70 | 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 43
EDID Block 1, Bytes 128-255 [80H-FFH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 02 03 2E F1 48 90 22 20 05 04 03 02 01 23 09 57
10 | 07 78 03 0C 00 40 00 B8 2D 20 C0 0E 01 4F 00 FE
20 | 08 10 06 10 18 10 28 10 38 10 E3 05 03 01 02 3A
30 | 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E
40 | 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A 00 00
50 | 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 A0 5A
60 | 00 00 00 1E 26 36 80 A0 70 38 1F 40 30 20 25 00
70 | A0 5A 00 00 00 1A 00 00 00 00 00 00 00 00 00 00
# RGB(C/S : 5C)
EDID Block 0, Bytes 0-127 [00H-7FH]
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 | 01 16 01 03 68 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 | 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 | 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 | 45 00 A0 5A 00 00 00 1E 66 21 50 B0 51 00 1B 30
50 | 40 70 36 00 A0 5A 00 00 00 1E 00 00 00 FD 00 3A
60 | 3E 1E 53 10 00 0A 20 20 20 20 20 20 00 00 00 FC
70 | 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 5C

- 14 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.4. White Balance Adjustment
4.4.1. Overview
▪ W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel’s W/B deviation
(2) How-it-works: When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range. In order to
prevent saturation of Full Dynamic range and data, one of
R/G/B is fixed at 192, and the other two is lowered to find
the desired value.
(3) Adj. condition: normal temperature
- Surrounding Temperature: 25±5 °C
- Warm-up time: About 5 Min
- Surrounding Humidity: 20% ~ 80%
4.4.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adj. Computer (During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(4) Video Signal Generator MSPG-925F 720p/204-Gray
(Model: 217, Pattern: 49)
※Color Analyzer Matrix should be calibrated using CS-1000
4.4.3. Equipment connection
4.4.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj.
RS-232C COMMAND Explanation
CMD DATA ID
Wb 00 00 Begin White Balance adj.
Wb 00 ff End White Balance adj.
(internal pattern disappears )
(2) Adjustment Map
Adj. item Command
(lower caseASCII)
Data Range
(Hex.)
CMD1 CMD2 MIN MAX
Cool R Gain j g 00 C0
G Gain j h 00 C0
B Gain j i 00 C0
Medium R Gain j a 00 C0
G Gain j b 00 C0
B Gain j c 00 C0
Warm R Gain j d 00 C0
G Gain j e 00 C0
B Gain j f 00 C0
4.4.5. Adj. method
4.4.5.1. Auto adj. method
(1) Set TV in ADJ mode using P-ONLY key (or POWER ON
key)
(2) Place optical probe on the center of the display
- It need to check probe condition of zero calibration before
adjustment.
(3) Connect RS-232C Cable
(4) Select mode in ADJ Program and begin a adjustment.
(5) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode (Cool, Medium,
Warm)
(6) Remove probe and RS-232C cable.
▪ W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need
4.4.5.2. Manual adj. method
(1) Set TV in Adj. mode using POWER ON
(2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface..
(3) Press ADJ key -> EZ adjust using adj. R/C -> 9. White-
Balance then press the cursor to the right (KEY►). When
KEY(►) is pressed 216 Gray internal pattern will be
displayed.
(4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
(5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature.
▪ If internal pattern is not available, use RF input. In EZ Adj.
menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner (ON). By selecting OFF, you can
adjust using RF signal in 216 Gray pattern.
▪ Adj. condition and cautionary items
(1) Lighting condition in surrounding area
Surrounding lighting should be lower 10 lux. Try to isolate
adj. area into dark surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface (80°~
100°)
(3) Aging time
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.

- 15 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.4.6. Reference (White Balance Adj. coordinate and
color temperature)
▪ Luminance: 204 Gray
▪ Standard color coordinate and temperature using CS-1000
(over 26 inch)
Mode Coordinate Temp △uv
X Y
Cool 0.269 0.273 13,000K 0.0000
Medium 0.285 0.293 9,300K 0.0000
Warm 0.313 0.329 6,500K +0.0030
▪ Standard color coordinate and temperature using CA-210(CH
18)
Mode Coordinate Temp △uv
X Y
Cool 0.269±0.002 0.273±0.002 13,000K 0.0000
Medium 0.285±0.002 0.293±0.002 9,300K 0.0000
Warm 0.313±0.002 0.329±0.002 6,500K 0.0000
(2) O/S Module(AUO, CMI, Sharp,IPS…)
Mode Coordinate Temp △uv
X Y
Cool 0.271±0.002 0.276±0.002 13,000K 0.0000
Medium 0.287±0.002 0.296±0.002 9,300K 0.0000
Warm 0.315±0.002 0.332±0.002 6,500K 0.0000
▪ Standard color coordinate and temperature using
CA-210(CH-18) – by aging time
GP4 Aging time
(Min)
Cool Medium Warm
X Y X Y X Y
269 273 285 293 313 329
1 0-2 283 293 299 313 320 339
2 3-5 282 291 298 311 319 337
3 6-9 281 290 297 310 318 336
4 10-19 279 289 295 309 316 335
5 20-35 277 284 293 304 314 330
6 36-49 274 279 290 299 311 325
7 50-79 271 277 287 297 308 323
8 80-149 270 274 286 294 307 320
9 Over 150 269 273 285 293 306 319
4.5. Option selection per country
4.5.1. Overview
(1) Press ADJ key on the Adj. R/C, and then select Country
Group Menu.
(2) Depending on destination, select KR or US, then on the
lower Country option, select US, CA, MX. Selection is done
using +, - KEY
4.6. Tool Option Inspection
▪ Method: Press Adj. key on the Adj. R/C, then select Tool option.
Model Tool 1 Tool 2 Tool 3 Tool 4 Tool 5 Tool 6 Tool 7
47G2-UG 32903 8258 30472 12332 18441 1322 5771
55G2-UG 32905 8258 30472 12332 18441 1322 5771
4.7. Local Dimming Inspection (Optional)
(1) Press ‘TILT” key of the Adj. R/C and check moving
patterns. The black bar patterns moves from top to bottom.
If a local dimming function does not work, a whole screen
shows full white
4.8. Ship-out mode check (In-stop)
▪ After final inspection, press In-Stop key of the Adj. R/C and
check that the unit goes to Stand-by mode.
▪ After final inspection, Always turn on the Mechanical S/W.
4.9. WIFI MAC ADDRESS CHECK
a. Using RS232
Command Set ACK
Transmission [A][l][][Set ID][][20][Cr] [O][K][x] or [N][G]
b. check the menu on in-start
Note that there are Wi-Fi MAC and MAC address.
Wi-Fi MAC is used for wireless network and MAC address is used
for wired network

- 16 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5. GND and Internal Pressure check
5.1. Method
(1) GND & Internal Pressure auto-check preparation
- Check that Power Cord is fully inserted to the SET.
(If loose, re-insert)
(2) Perform GND & Internal Pressure auto-check
- Unit fully inserted Power cord; Antenna cable and A/V
arrive to the auto-check process.
- Connect D-terminal to AV JACK TESTER
- Auto CONTROLLER (GWS103-4) ON
- Perform GND TEST
- If NG, Buzzer will sound to inform the operator.
- If OK, changeover to I/P check automatically.
(Remove CORD, A/V form AV JACK BOX)
- Perform I/P test
- If NG, Buzzer will sound to inform the operator.
- If OK, Good lamp will lit up and the stopper will allow the
pallet to move on to next process.
5.2. Checkpoint
(1) Test voltage
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
(2) TEST time: 1 second
(3) TEST POINT
- GND Test = POWER CORD GND and SIGNAL CABLE
GND.
- Hi-pot Test = POWER CORD GND and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
6. EYE-Q Operation check
Step 1) Turn on the TV..
Step 2) Press 'EYE button' on the adjustment remote-
controller.
Step 3) Cover 'Eye Q sensor' on the front of set with your
hands, hold it for 6 seconds.
Step 4) Check "the Sensor Data" on the screen, make certain
that Data is below 10. If Data isn’t below 10 in 6
seconds, Eye Q sensor would be bad. You should
change Eye Q sensor.
Step 5) Uncover your hands from Eye Q sensor, hold it for 6
seconds.
Step 6) Check "Back Light(xxx)" on the screen, check data
increase . You should change Eye Q sensor.
7. QWERTY Remote Control Inspection
- Required Instruments: Inspection RF-remote control,
Inspection IR-KEY-CODE remote control.
- Prior to the test, AA battery for the RF-remote control should
be adequate. Change the battery for each LOT is
recommended)
- Test procedures
(1) Press the ‘START’ key on the controller to pair with the
set.
(2) Press the ‘OK’ key in the controller and check whether
the cursor appears on the set.
(3) Press ‘Vol+ (STOP)’ key to de-pair with the set.
8. Audio
No Item Min Typ Max Unit Remark
1 Audio
practical
max Output,
L/R
9.0 10.0 12.0 W Measurement
condition
(TBD)
8.5 8.9 9.8 Vrms
2 Speaker
(8Ω Imped-
ance)
10.0 15.0 W Measurement
condition
(TBD)
Measurement condition:
(1) RF input: Mono, 1 KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1 KHz sine wave signal 0.4Vrms
(3) RGB PC: 1 KHz sine wave signal 0.7Vrms
<Step 2>
<Step 5> <Step 6>
<Step 3>
<Step 4>

- 17 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
9. 3D function test
9.1 Test equipment
(1) Pattern Generator MSHG-600 or MSPG-6100 (HDMI 1.4
support)
(2) Pattern: HDMI mode (model No. 872, pattern No. 83)
9.2 Test method
(1) Input 3D test signal as Fig.1.
(2) Press ‘OK” key as a 3D input OSD is shown.
(3) Check pattern as Fig2 without 3D glasses. (3D mode
without 3D glasses)
Fig.2
<OK in 3D mode without 3D glasses>
10. IR Blaster Function Test
10.1. Test equipment
(1) IR Blaster Jig
(2) Test Mode : Power Only Mode
10.2 Test method
(1) Input IR Blaster Jig to IR Blaster Phone Jack
(2) Press MPX Key
(3) Checked LED Lighting of IR Blaster Jig.
11. USB S/W Download
(optional, Service only)
(1) Put the USB Stick to the USB socket
(2) Automatically detecting update file in USB Stick
- If your downloaded program version in USB Stick is lower
than that of TV set, it didn’t work. Otherwise USB data is
automatically detected.
(3) Show the message “Copying files from memory”
(5) Updating Completed, The TV will restart automatically
(6) If your TV is turned on, check your updated version and
Tool option.
* If downloading version is more high than your TV have, TV
can lost all channel data. In this case, you have to channel
recover. If all channel data is cleared, you didn’t have a DTV/
ATV test on production line.
* After downloading, TOOL OPTION setting is needed again.
(1) Push "IN-START" key in service remote controller.
(2) Select "Tool Option 1" and Push “OK” button.
(3) Punch in the number. (Each model has their number.)
(5) Updating Completed, The TV will restart automatically
(6) If your TV is turned on, check your updated version and
Tool option.
* If downloading version is more high than your TV have, TV
can lost all channel data. In this case, you have to channel
recover. If all channel data is cleared, you didn’t have a DTV/
ATV test on production line.
* After downloading, TOOL OPTION setting is needed again.
(1) Push "IN-START" key in service remote controller.
(2) Select "Tool Option 1" and Push “OK” button.
(3) Punch in the number. (Each model has their number.)
(4) Updating is staring.

- 18 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
12. Optional adjustments
12.1. Manual ADC Calibration
12.1.1. Equipment & Condition
(1) Adjustment Remocon
(2) 801GF (802B, 802F, 802R) or MSPG925FA Pattern
Generator
- Resolution : 480i Comp1 (MSPG-925FA: model-209,
pattern-65)
- Resolution : 1080p Comp1 (MSPG-925FA: model-225,
pattern-65)
- Resolution : 10 8 0 p RGB (MSPG- 9 25FA: m o d el-225 ,
pattern-65)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
12.1.2. Adjust method
12.1.2.1 ADC 480i/1080p Comp1, RGB
(1) Check connected condition of Comp1/RGB cable to the
equipment
(2) Give a 480i Mode, Horizontal 100% Color Bar Pattern to
Comp1. (MSPG-925FA -> Model: 209, Pattern: 65)
(3) Change input mode as Component1 and picture mode as
“Standard”
(4) Press the In-start Key on the ADJ remote after at least 1
min of signal reception. Then, select 7.External ADC. And
Press OK or Right Button for going to sub menu.
(5) Press OK in Comp 480i menu
(6) Give a 1080p Mode, Horizontal 100% Color Bar Pattern to
Comp1. (MSPG-925FA -> Model: 225, Pattern: 65)
(7) Press OK in Comp 1080p menu
(8) Perform (6) and (7) in RGB-PC
(9) If ADC Comp is successful, “ADC Component Success” is
displayed. If ADC calibration is failure, “ADC Component
Fail” is displayed.
(10) If ADC calibration is failure, after rechecking ADC pattern
or condition, retry calibration
(11) If ADC RGB calibration is successful, “ADC RGB
Success” is displayed. If ADC calibration is failure, “ADC
RGB Fail” is displayed.
(12) If ADC calibration is failure, after recheck ADC pattern or
condition, retry calibration
12.2. Manual White balance Adjustment
12.2.1. Adj. condition and cautionary items
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux. Try to isolate adj. area into dark
surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface
(80°~ 100°)
(3) Aging time
▪ After Aging Start, Keep the Power ON status during 5
Minutes.
▪ In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
12.2.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adj. Computer (During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(4) Video Signal Generator MSPG-925F 720p/216-Gray
(Model: 217, Pattern: 78)
12.2.3. Adjustment
(1) Set TV in Adj. mode using POWER ON
(2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface.
(3) Press ADJ key -> EZ adjust using adj. R/C -> 6. White-
Balance then press the cursor to the right (KEY►).
When KEY(►) is pressed 216 Gray internal pattern will be
displayed.
(4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
(5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature.
▪ If internal pattern is not available, use RF input. In EZ Adj.
menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner(ON). By selecting OFF, you can
adjust using RF signal in 216 Gray pattern.

- 19 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
SCREW WORKING GUIDE
•FAB31339402
(M3*L4.5, BK, Machine)
•12EA
•FAB31339201
(M3*L10, BK, Taptite)
•8EA
•FAB30016122
(M4*L20, BK, Taptite)
•4EA
DD
D
D
D
DD
D
D
D
D
D
■Screw specification and application situation
C
C
A
AA
AA
AA
A
A
A
A
A
A
A
A
A
A
A
A
A
B
B
C
CC
CC
CC
CC
CC
CC
C
•FAB30078812
(M6*L10, BK, Machine)
4EA
B
B
B
B
B
B
A
A
A
A
AC
※Warning
Check Screw Type When Screw is assembled
at Part. If Screw is used at the part
Module will get damaged
A
AC
※Warning
Check Screw Type When Screw is assembled
at Part. If Screw is used at the part
Module will get damaged
A

- 20 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
EXPLODED VIEW
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 X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
A7
A2
A10
AG1 900
300
200
400
540
521
530
800
810
910
120
* Set + Stand * Stand Base + Body
LV1
560
570