LG 42LT777H Schematic

Internal Use Only

North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com

LED LCD TV

SERVICE MANUAL

CHASSIS : LA2FZ

MODEL : 42LT777H 42LT777H-UA

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

Printed in KoreaP/NO : MFL67603807 (1308-REV00)

CONTENTS

CONTENTS .............................................................................................. 2

PRODUCT SAFETY ................................................................................. 3

SPECIFICATION ....................................................................................... 4

ADJUSTMENT INSTRUCTION ................................................................ 9

TROUBLESHOOTING ............................................................................. 25

BLOCK DIAGRAM .................................................................................. 26

EXPLODED VIEW .................................................................................. 27

SCHEMATIC CIRCUIT DIAGRAM ..............................................................

Only for training and service purposes

- 2 -

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

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 damage d by accidental sho rt s of the circuitr y th at 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 MΩ and 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 par t. 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

Only for training and service purposes

- 3 -

SPECIFICATION

NOTE : Specifications and others are subject to change without notice for improvement

1. Application range

This spec sheet is applied Commercial LCD TV with LA2FZ chassis

3. Test method

1) Performance: LGE TV test method followed

2) Demanded other specification

- Safety : CE, IEC specification

- EMC: CE, IEC specification

2. Test condition

Each part is tested as below without special notice.

1) Temperature : 20 ºC ± 5 ºC

2) Relative Humidity: 65 % ± 10 %

3) Power Voltage : Standard input voltage (AC 110-240 V~, 50/60 Hz) * Standard Voltage of each products is marked by models.

4) Specification and performance of each parts are followed

ea ch dr awi ng an d spe cif icat ion by pa rt nu mbe r in accordance with BOM.

5) The receiver must be operated for about 5 minutes prior to

the adjustment.

4. General Specification

No Item Specication Remark

1 Receiving System 1) ATSC / NTSC-M, 64 & 256 QAM

2 Available Channel 1) VHF : 02~13

2) UHF : 14~69

3) DTV : 02-69

4) CATV : 01~135

5) CADTV : 01~135

3 Input Voltage 1) AC 100 ~ 240V 50/60Hz Mark : 110V, 60Hz (N.America)

4 Market NORTH AMERICA

5 Screen Size 32/37/42/47/55 inches

6 Aspect Ratio 16:9

7 Tuning System FS

8 Module LC320EXN-SEA2 LGD 32LT770H-UA / 32LT777H-UA

LC370EUN-SEM2 LGD 37LT770H-UA / 37 LT777H-UA

LC420EUE-SEM1 LGD 42 LT770H-UA / 42 LT777H-UA

LC470EUE-SEM1 LGD 47 LT770H-UA / 47 LT777H-UA

9 Operating

Environment

10 Storage

Environment

LC420EUG-PFF1 / LC420EUH-PFP1 / LC420EUH-PFM1

LC470EUG-PFF1 / LC470EUH-PFP1 LGD 47 LP870H-UA

LC550EUG-PFF1 / LC550EUH-PFP1 LGD 55 LP870H-UZ

1) Temp : 0 ~ 40 deg

2) Humidity : ~ 80 %

1) Temp : -20 ~ 60 deg

2) Humidity : ~ 85 %

LGD 42 LP870H-UA

Only for training and service purposes

- 4 -

5. Supported video resolutions

5.1. RGB 2D input(PC)

No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed DDC

1 640*350 31.468 70.09 25.17 EGA X

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 1152*864 54.348 60.053 80.002 VESA O

1360*768 47.712 60.015 85.50 FHD only VESA (WXGA) X

7 1920*1080 67.5 60 148.5 FHD only HDTV 1080P O

5.2. RGB 3D input(PC) (OPTION)

No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 3D input proposed mode

1 640*350 31.468 70.09 25.17 Side by Side Top & Bottom

2 720*400 31.469 70.08 28.32 Side by Side Top & Bottom

3 640*480 31.469 59.94 25.17 Side by Side, Top and Bottom

5.3. HDMI 2D Input (PC/DTV)

No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed DDC

1 640*350 31.468 70.09 25.17 EGA X

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) X

7 1280*1024 63.981 60.020 108.00 FHD only VESA (SXGA) O

8 1920*1080 67.5 60 148.5 FHD only HDTV 1080P O

DTV

1 720*480 31.50 60 27.027 SDTV 480P

2 720*480 31.469 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 67.500 60 148.50 HDTV 1080P

8 1920*1080 67.43 59.94 148.352 HDTV 1080P

9 1920*1080 27.000 24.000 74.25 HDTV 1080P

10 1920*1080 26.97 23.97 74.176 HDTV 1080P

11 1920*1080 33.75 30.000 74.25 HDTV 1080P

12 1920*1080 33.716 29.976 74.176 HDTV 1080P

Only for training and service purposes

- 5 -

5.4. HDMI 3D Input(1.4b) (OPTION)

No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 3D input proposed mode Proposed

62.938 / 63

1 640*480

31.469 / 31.5

62.938 / 63

2 720*480

31.469 / 31.5

89.91 / 90

3 1280*720

44.96 / 45

67.432 / 67.5

4 1920*1080

33.72 / 33.75

53.946 / 54

5 1920*1080

26.973 / 27

67.432 / 67.5

6 1920*1080

33.716 / 33.75

7 1920*1080 67.43 / 67.5 59.94 / 60 148.35/148.50

59.94/ 60

59.94 / 60

23.976 / 24

29.97 / 30.00

50.35/50.4

50.35/50.4 Side-by-side(Full)

25.175/25.2

54.001/54.054

54.001/54.054 Side-by-side(Full)

27.00/27.027

148.351/148.5

148.351/148.5 Side-by-side(Full)

74.17/74.25

148.35/148.5

148.35/148.5 Side-by-side(Full)

74.17/74.25

148.351/148.5

148.351/148.5 Side-by-side(Full)

74.176/74.25

148.35/148.5

148.35/148.5 Side-by-side(Full)

74.175/74.25

Frame packing Line alternative

Top-and-Bottom Side-by-side(half)

Frame packing Line alternative

Top-and-Bottom Side-by-side(half)

Frame packing Line alternative

Top-and-Bottom Side-by-side(half)

Frame packing Field alternative

Top-and-Bottom Side-by-side(half)

Frame packing Line alternative

Top-and-Bottom Side-by-side(half)

Frame packing Line alternative

Top-and-Bottom Side-by-side(half)

(SDTV 480P) (SDTV 480P) Secondary(SDTV 480P) Secondary(SDTV 480P)

(SDTV 480P) Secondary(SDTV 480P) Secondary(SDTV 480P)

Primary(HDTV 720P) (HDTV 720P) (HDTV 720P) Primary(HDTV 720P) Primary(HDTV 720P)

Primary(HDTV 1080I) (HDTV 1080I) (HDTV 1080I) Secondary(HDTV 1080I) Primary(HDTV 1080I)

Primary(HDTV 1080P) (HDTV 1080P) (HDTV 1080P) Primary(HDTV 1080P) Primary(HDTV 1080P)

(HDTV 1080P) (HDTV 1080P) (HDTV 1080P) (HDTV 1080P) Secondary(HDTV 1080P)

Primary(HDTV 1080P) Secondary(HDTV 1080P)

5.5. HDMI-PC 3D Input (OPTION)

No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 3D input proposed mode

1 1024*768 48.363 60.004 65.000 Side by Side , Top & Bottom

2 1360*768 47.712 60.015 85.500 Side by Side , Top & Bottom

1920*1080 67.50 60.00 148.50

- 6 -

Only for training and service purposes

Side by Side , Top & Bottom Checkerboard, Single Frame Sequential Row Interleaving, Column Interleaving

5.6. HDMI 3D Input(1.3) (OPTION)

No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode

1280*720 45.00 60.00 74.25 HDTV 720P

2 1920*1080 33.75 60.00 74.25 HDTV 1080I Side by Side, Top & Bottom

1920*1080 67.50 60.00 148.5 HDTV 1080P

4 1920*1080 27.00 24.00 74.25 HDTV 1080P Side by Side, Top & Bottom, Checkerboard

5 1920*1080 33.75 30.00 74.25 HDTV 1080P Side by Side, Top & Bottom, Checkerboard

Side by Side, Top & Bottom, Single Frame Sequential

Side by Side, Top & Bottom, Checkerboard Single Frame Sequential, Row Interleaving, Column Interleaving

No Side by Side Top & Bottom Checkerboard Single Frame

Sequential

Frame Packing 2D to 3D

5.6. USB Input (OPTION)

5.6.1. 3D Auto detection

No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) 3D input proposed mode Proposed

1 1920*1080 33.75 30.000 74.25 Side by Side

Top & Bottom

Checkerboard

MPO(Photo)

5.6.1. 3D Auto detection

No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) 3D input proposed mode Proposed

1 1920*1080 33.75 30.000 74.25 Side by Side

Top & Bottom

Single Frame Sequential

Row Interleaving

Column Interleaving

[Photo: Side by Side(half)

Top & Bottom]

HDTV 1080P

Only for training and service purposes

- 7 -

5.7. RF 3D Input(DTV) (OPTION)

No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode

1 1280*720 45.000 60 74.25 HDTV 720P Side by Side, Top & Bottom

2 1920*1080 33.75 60 74.25 HDTV 1080I Side by Side, Top & Bottom

5.8. DLNA Input (OPTION)

5.8.1. 3D Auto detection

No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) 3D input proposed mode Proposed

1 1920*1080 33.75 30.000 74.25 Side by Side

Top & Bottom

Checkerboard

5.8.2. 3D Manual

No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) 3D input proposed mode Proposed

1 1920*1080 33.75 30.000 74.25 Side by Side

Top & Bottom

Checkerboard

Single Frame Sequential

Row Interleaving

Column Interleaving

[Photo: Side by Side(half)

Top & Bottom]

HDTV 1080P

Only for training and service purposes

- 8 -

ADJUSTMENT INSTRUCTION

1. Application Range

This spec. sheet applies to LA2FZ Chassis applied LED 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

4. MAIN PCBA Adjustments

4.1. ADC Calibration

- An ADC calibration is not necessary because MAIN SoC (LGE35230) is already calibrated from IC Maker

- If it needs to adjust manually, refer to appendix.

4.2. MAC Address, ESN Key and Widevine Key download

4.2.1. Equipment & Condition

1) Play file: keydownload.exe

4.2.2. Communication Port connection

1) Key Write: Com 1,2,3,4 and 115200 (Baudrate)

2) Barcode: Com 1,2,3,4 and 9600 (Baudrate)

4.2.3. Download process

1) Select the download items.

2) Mode check: Online Only

3) Check the test process

- US , C anada m o d els: D E T E CT - > M AC_WRI T E -> WIDEVINE_WRITE

- Korea, Me xic o mo del s: D ETE CT - > MA C_W RIT E -> WIDEVINE_WRITE

4) Play : START

5) Check of result: Ready, Test, OK or NG

4.2.4. Communication Port connection

1) Connect: PCBA Jig -> RS-232C Port == PC -> RS-232C

Port

3. Adjustment items

3.1. Main PCBA Adjustments

(1) ADC adjustment: Component 480i, 1080p / RGB-PC 1080p (2) EDID downloads for HDMI and RGB-PC

3.2. Final assembly adjustment

(1) White Balance adjustment (2) RS-232C functionality check (3) Factory Option setting per destination (4) Shipment mode setting (IN-STOP) (5) GND and HI-POT test

3.3. Appendix

(1) Tool option menu, USB Download (S/W Update, Option and

Service only) (2) Manual adjustment for ADC calibration and White balance. (3) Shipment conditions, Channel pre-set

Only for training and service purposes

- 9 -

4.2.5. Download

4.2.6. Inspection

- In INSTART menu, check these keys.

4.3. LAN Inspection

4.3.1. Equipment & Condition

▪ Each other connection to LAN Port of IP Hub and Jig

4.4. LAN PORT INSPECTION(PING TEST)

4.4.1. Equipment setting

1) Play the LAN Port Test PROGRAM.

2) Input IP set up for an inspection to Test Program.

*IP Number : 12.12.2.2.

4.4.2. LAN PORT inspection (PING TEST)

1) Play the LAN Port Test Program.

2) connect each other LAN Port Jack.

3) Play Test (F9) button and confirm OK Message.

4) remove LAN CABLE

4.3.2. LAN inspection solution

▪ LAN Port connection with PCB ▪ Network setting at MENU Mode of TV (Installer Menu -> 119

-> 253 -> Menu)

▪ setting automatic IP ▪ Setting state confirmation

- If automatic setting is finished, you confirm IP and MAC Address.

Only for training and service purposes

- 10 -

4.5. Model name & Serial number Download

4.5.1. Model name & Serial number D/L

■ Press “Power on” key of service remocon.(Baud rate :

115200 bps)

■ Connect RS232 Signal Cable to RS-232 Jack.

■ Write Serial number by use RS-232.

■ Must check the serial number at Instart menu

4.5.2. Method & notice

A. Serial number D/L is using of scan equipment. B. Setting of scan equipment operated by Manufacturing

Technology Group.

C. Serial number D/L must be conformed when it is produced

in production line, because serial number D/L is mandatory by D-book 4.0

※ Manual Download (Model Name and Serial Number) If th e TV set is do wnl oaded By OTA or Servic e man, Sometimes model name or serial number is initialized.( Not always) There is impossible to download by bar code scan, so It need Manual download. a. Press the ‘instart’ key of ADJ remote controller. b. Go to the menu ‘16.Model Number D/L’ like below photo. c. Input the Factory model name(ex 47LM960V-ZA) or Serial

number like photo.

4.6. EDID Download

4.6.1. 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”.

4.6.2. Equipment

(1) Since EDID data is embedded, EDID download JIG, HDMI

cable and D-sub cable are not need.

(2) Adjust by using remote controller.

4.6.3. 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.

4.6.4. EDID DATA

4.6.4.1. PCM(US) _ XvYcc : 0n

d. Check the model name Instart menu -> Factory name

displayed (ex 47LM960V-ZA)

e. Check the Diagnostics (DTV country only) -> Buyer model

displayed (ex 47LM960V-ZA)

Only for training and service purposes

- 11 -

▪Reference

- HDMI1 ~ HDMI3 / RGB

- In the data of EDID, bellows may be different by S/W or Input mode.

ⓐ Product ID

HEX EDID Table DDC Function

0001 0100 Analog

0001 0100 Digital

ⓑ Serial No: Controlled on production line. ⓒ Month, Year: Controlled on production line:

ex) Monthly : ‘01’ -> ‘01’ Year : ‘2012’ -> ‘16’ ⓓ Model Name(Hex): LGTV

Chassis MODEL NAME(HEX)

LA2FF/ LA2FZ/

LA3BF

00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20

ⓔ Checksum(LG TV): Changeable by total EDID data.

ⓔ1 ⓔ2 ⓔ3

HDMI1 43 B5 X

HDMI2 43 A5 X

HDMI3 43 95 X

RGB X X 5C

ⓕ Vendor Specific(HDMI)

INPUT MODEL NAME(HEX)

HDMI1 67 03 0C 00 10 00 80 2D

HDMI2 67 03 0C 00 20 00 80 2D

HDMI3 67 03 0C 00 30 00 80 2D

ⓕ Vendor Specific(HDMI)

INPUT MODEL NAME(HEX)

HDMI1 67 03 0C 00 10 00 80 2D

HDMI2 67 03 0C 00 20 00 80 2D

HDMI3 67 03 0C 00 30 00 80 2D

4.6.4.2. PCM(US) _XvYcc : off

▪Reference

- HDMI1 ~ HDMI3 / RGB

- In the data of EDID, bellows may be different by S/W or Input mode.

ⓐ Product ID

HEX EDID Table DDC Function

0001 0100 Analog

0001 0100 Digital

ⓑ Serial No: Controlled on production line. ⓒ Month, Year: Controlled on production line:

ex) Monthly : ‘01’ -> ‘01’ Year : ‘2012’ -> ‘16’ ⓓ Model Name(Hex): LGTV

Chassis MODEL NAME(HEX)

LA2FF/ LA2FZ/

LA3BF

00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20

5. Final Assembly Adjustment

5.1. White Balance Adjustment

5.1.1. Overview

5.1.1.1. 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%

- Before White balance adjustment, Keep power on status, don’t power off

5.1.1.2. 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 Pow er ON status during 5

Minutes.

- In case of LCD, Back-light on should be checked using no

signal or Full-white pattern.

5.1.2. 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) Vid eo Sign al Gene rator MSP G-925 F 720p/20 4-Gray

(Model: 217, Pattern: 49)

※ Color Analyzer Matrix should be calibrated using CS-1000

ⓔ Checksum(LG TV): Changeable by total EDID data.

ⓔ1 ⓔ2 ⓔ3

HDMI1 43 68 X

HDMI2 43 58 X

HDMI3 43 48 X

RGB X X 5C

Only for training and service purposes

- 12 -

5.1.3. Equipment connection

If TV internal pattern is used, not needed

Color Analyzer

Probe

※

RS-232C

Signal Source

※

Pattern Generator

RS-232C

Computer

RS-232C

5.1.4. Adjustment Command (Protocol)

(1) RS-232C Command used during auto-adj.

RS-232C COMMAND

CMD DATA ID

Explanation

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)

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

Data Range (Hex.)

5.1.5. Adjustment method

5.1.5.1 Auto WB calibration (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

5.1.7. Reference (White Balance Adj. coordinate and color temperature)

※ LT Series (don’t use G Gain fix(172))

▪ Luminance: 204 Gray ▪ Standard color coordinate and temperature using CS-1000

(over 26 inch)

Mode

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 0.0000

▪ St a n d a r d color coord i n a t e a n d t emperatu r e u s i n g

CA-210(CH 14)

(1) LGD

Mode

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

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

▪ St a n d a r d color coord i n a t e a n d t emperatu r e u s i n g

CA-210(CH-14) – by aging time

(1) Edge LED models (applied only LGD Module) in LGERS

GP4

1 0-2 279 288 295 308 319 338

2 3-5 278 286 294 306 318 336

3 6-9 277 285 293 305 317 335

4 10-19 276 283 292 303 316 333

5 20-35 274 280 290 300 314 330

6 36-49 272 277 288 297 312 327

7 50-79 271 275 287 295 311 325

8 80-149 270 274 286 294 310 324

9 Over 150 269 273 285 293 309 323

Coordinate

X Y

Aging time

(Min)

Temp △uv

Coordinate

Cool Medium Warm

X Y X Y X Y

269 273 285 293 313 329

Temp △uv

5.1.6. Reference (White Balance Adj. coordinate and color temperature)

(1) Luminance: 204 Gray, 80IRE (2) Standard color coordinate and temperature using CS-1000

(over 26 inch)

Only for training and service purposes

- 13 -

5.2. Tool Option selection

▪ Method: Press Adj. key on the Adj. R/C, then select Tool

option

Model 32LT777H-UA

tool option 1 4100 5 6 7

tool option 2 8389 8389 8389 8389

tool option 3 9229 9229 9229 9229

tool option 4 13006 13006 13004 13004

tool option 5 4315 4187 4187 4187

tool option 6 1305 1305 1305 1305

Tool option 7 128 128 4224 4224

Commercial

Tool Option

Country Group 02 02 02 02

(LGD)

1555 1555 1555 1555

● Tool option can be reconstructed by Software

37LT777H-UA 42LT777H-UA 47LT777H-UA

5.4. Wi-Fi MAC Address Check

5.4.1. Using RS232 Command

Command Set ACK

Transmission [A][l][][Set ID][][20][Cr] [O][K][x] or [N][G]

5.4.2. Check the menu on in-start

5.3. EYE-Q Check

Step 1) Turn on the TV.. Step 2) Press 'EY E bu tto n' on the adj ustment rem ote -

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.

5.5. Wi-Fi Test

Step 1) Turn on TV Step 2) Select Network Connection option in Network Menu. Installer menu -> 119 -> 253 -> Menu

Step 3) Select Start Connection Button in Network Connection.

Only for training and service purposes

- 14 -

Step 4) If the system finds any AP like blow PIC, it is working

well

5.6. HDMI ARC Function Inspection

5.6.1. Test equipment

- Optic Receiver Speaker

- MSHG-600 (SW: 1220 ↑)

- HDMI Cable (for 1.4 version)

5.6.2. Test method

(1) Insert the HDMI Cable to the HDMI ARC port from the

master equipment (HDMI1)

6. Check Commercial features

Model info. Commercial Feature

Name inch IR Out DC

Power

(12V)

LT770H-UA 32/37/42/47/55 O O O O O

6.1. External SPK Out

6.1.1. Equipment & Condition

▪ Jig (Speaker out JIG) or Oscilloscope ▪ Power only mode

6.1.2. Check the speaker out

1) Connect the External Speaker : check the sound Connect oscilloscope, you can see this waveform

Out

Ext

SPK

Out

RJP

(RJ-45

interface)

Pro:Idiom

(2) Check the sound from the TV Set

(3) Check the Sound from the Speaker or using AV & Optic

TEST program (It’s connected to MSHG-600)

* Remark: Inspect in Power Only Mode and check SW version

in a master equipment

6.2. IR Out and DC Power Outlet (12V)

6.2.1. Equipment & Condition

▪ Jig (commercial check JIG) ▪ Special 232C Cable for commercial check Jig ▪ Power only mode ▪ PCB Mode (installer menu -> 118 -> 9 )

Only for training and service purposes

- 15 -

6.2.2. Check the power out & IR out – commercial check jig

(1) Connect each other RS232c port on the Commercial Check

JIG

(2) Press RED Color Button on SVC Remote-controller in

power only mode (or PCB Mode)

(3) Check the LED of jig board

- +12V LED (OK condition: Turn On)

- IR LED (OK condition: blinking)

6.2.3. Check the power out & IR out – mini jig

(1) Connect mini jig on RS232c port (2) Press RED Color Button on SVC Remote-controller in

power only mode (or PCB Mode)

(3) Check the LED of mini jig

6.3. RJP Check

6.3.1. Initial setting

(1) Select Power switch ( up ) as the picture (2) Set the Switch No.5 to ON (up) as the picture Others should be set to OFF (down)

6.3.2. Checking Guide

(1) Press the P-ONLY key of R/C (2) Press the Exit key of R/C (3) Connect with the TV through RJP cable (wait for the JIG

on) (4) RJP Pin check is carried out automatically (5) The result is shown as below (6) If RJP Pin check finished or you check other function, must

remove the RJP cable from TV

6.2.4. Check the power out & IR out – New jig

(1) Of the DFT process performance tests showing Waite

Massage automatically scan pause

(2) Adjust the remote control Press any Key IR Out Make sure

that only Nomal LED blinks. (3) ETC Key -> red Pressing the Info Key i) 5V Out Output 3 seconds ii) 5V output OFF iii) 12V Out Output 3 seconds iv) 12V output OFF(Given the ST output time adjustable) (4) Nomal LED, 5V LED, 12V LED flicker worker using the

PASS. (5) After the check is complete automatic test is initiated.

Only for training and service purposes

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* RJP Cable : Direct LAN Cable

+ 36 hidden pages