LG 49LX761H-ZA Schematic

Internal Use Only

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LED TV

SERVICE MANUAL

CHASSIS : LD5GG

MODEL : 49LX761H 49LX761H-ZA

CAUTION

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

Printed in KoreaP/NO : MFL69380404 (1508-REV00)

CONTENTS

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

SAFETY PRECAUTIONS ........................................................................ 3

SERVICING PRECAUTIONS ................................................................... 4

SPECIFICATION ...................................................................................... 6

ADJUSTMENT INSTRUCTION ..............................................................10

TROUBLE SHOOTING GUIDE ................................................................20

BLOCK DIAGRAM ..................................................................................27

EXPLODED VIEW ...................................................................................28

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

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 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 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 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

Only for training and service purposes

- 3 -

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 conict 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.

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. Do not spray chemicals on or near this receiver or any of its assemblies.

4. Unless specied 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 ammable mixture. Unless specied otherwise in this service manual, lubrication

of contacts in not required.

5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this service manual might be equipped.

6. 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.

7. 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.

8. Use with this receiver only the test xtures specied in this

service manual.

CAUTION: Do not connect the test xture 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 eld-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 sol-

der removal devices not classied as “anti-static” can generate electrical charges sufcient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate

electrical charges sufcient 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 oor can generate static electricity sufcient to damage an ES device.)

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 wirebristle (0.5 inch, or 1.25 cm) 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 circuit

board 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 ows 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.

Only for training and service purposes

- 4 -

IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent at 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.

3. Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.

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.

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.

Only for training and service purposes

- 5 -

SPECIFICATION

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

1. Application range

This specification is applied to the LED TV used LD5GG chassis.

2. Requirement for Test

Each part is tested as below without special appointment.

1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C

2) Relative Humidity: 65 % ± 10 %

3) Power Voltage : Standard input 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 : CE, IEC specification

- EMC : CE, IEC

4. Model General Specification

No. Item Specication Remarks

1 Market EU(PAL Market-37Countries) DTV & Analog (Total 37 countries)

DTV (MPEG2/4, DVB-T) : 26 countries Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria, France, Spain, , Belgium, Luxemburg, Greece, Czech, Turkey, Moroco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania, Bosnia, Slovakia, Beralus

DTV (MPEG2/4, DVB-T2) : 11 countries UK(Ireland), Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan Russia, Italy, Croatia, Serbia

DTV (MPEG2/4, DVB-C) : 37 countries Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria, France, Spain, Italy, Belgium, Russia, Luxemburg, Greece, Czech, Croatia, Turkey, Moroco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania, Bosnia, Serbia, Slovakia, Beralus, UK, Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan

DTV (MPEG2/4,DVB-S) : 37 countries Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria, France, Spain,Belgium, Luxemburg, Greece, Czech, Turkey, Moroco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania, Bosnia, Slovakia, Beralus, UK(Ireland), Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan, Russia, Italy, Croatia, Serbia

Only for training and service purposes

- 6 -

2 Television system 1) Digital TV

- DVB-T/T2

- DVB-C

- DVB-S/S2

2) Analogue TV

- PAL/SECAM B/G/I/D/K,

- SECAM L/L’

3 Program coverage 1) Digital TV

- VHF, UHF

- C-Band, Ku-Band

2) Analogue TV

- VHF : E2 to E12

- UHF : E21 to E69

- CATV : S1 to S20

- HYPER : S21 to S47

4 Receiving system Analog : Upper Heterodyne

Digital : COFDM, QAM

Supported satellite : 35 satellites ABS1 75.0E , AMOS 4.0W , ASIASAT3S 105.5E , ASTRA

19.2E , ASTRA 23.5E , ASTRA 28.2E , ASTRA 4.8E, ATLANTIC BIRD2 8.0W , ATLANTIC BIRD3 5.0W , BADR 26.0E , DIRECTV-1R 56.0E , EUROBIRD 9A 9.0E , EUROBIRD3

33.0E , EUTELSAT 36 A/B 36.0E , EUTELSAT W2A 10.0E , EUTELSAT W3A 7.0E , EUTELSAT7WA 7.3W EUTELSAT 16.0E , EXPRESS AM1 40.0E , EXPRESS AM3

140.0E , EXPRESS AM33 96.5E , HELLASSAT 39.0E , HISPASAT 1CDE 30.0W HOTBIRD 13.0E , INTELSAT10&7 68.5E , INTELSAT15 85.2E , INTELSAT1R 50.0W, INTELSAT903 33.5W , INTELSAT904

60.0E , NILESAT 7.0W , NSS12 57.0E , THOR 0.8W , TURKSAT

42.0E , YAMAL201 90.0E , OTHER

▶ DVB-T

- Guard Interval(Bitrate_Mbit/s) 1/4, 1/8, 1/16, 1/32

- Modulation : Code Rate QPSK : 1/2, 2/3, 3/4, 5/6, 7/8 16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8 64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8 ▶ DVB-T2 (Model : *L*V*-Z* (T2 only Model))

- Guard Interval(Bitrate_Mbit/s) 1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256,

- Modulation : Code Rate QPSK : 1/2, 2/5, 2/3, 3/4, 5/6 16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6 64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6 256-QAM : 1/2, 2/5, 2/3, 3/4, 5/6 ▶ DVB-C

- Symbolrate :

4.0Msymbols/s to 7.2Msymbols/s

- Modulation : 16QAM, 64-QAM, 128-QAM and 256-QAM ▶ DVB-S/S2

- symbolrate DVB-S2 (8PSK / QPSK) : 2 ~ 45Msymbol/s DVB-S (QPSK) : 2 ~ 45Msymbol/s

- viterbi DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8 DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10

Only for training and service purposes

- 7 -

Scart (1EA) PAL, SECAM Scart jack is Full scart and support

ATV/DTV-OUT (not support DTV Auto AV)

6 Head phone out Antenna, AV, HDMI1, HDMI2, USB1,

USB2

7 HDMI Input (2EA) HDMI1-DTV

HDMI2-DTV

8 SPDIF out (1EA) SPDIF out

9 USB (2EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD

10 Ethernet Connect (2EA) Ethernet Connect

Support HDCP

11 PCMCIA Card slot

(1EA)

12 Speaker Out (2EA) External Volume,

13 LAN LAN

* RF receiving coverage

Televison System DVB-T/T2

Programme Coverage VHF, UHF

Maximum number of

storable programmes

External Antenna Impedance 75 Ω

PCMCIA slot

External Volume Control

AUX LAN

Digital TV

(Depending on Country)

DVB-C

DVB-S/S2

C-Band, Ku-Band

DVB-T/T2/C & Analogue TV : 1,500

Analogue TV

(Depending on Country)

PAL/SECAM B/G/I/D/K

SECAM L/L’

VHF:E2 to E12, UHF : E21 to E69,

CATV : S1 to S20, HYPER : S21 to S47

DVB-S/S2 : 6,000

Only for training and service purposes

- 8 -

5. External Input Support Format

5.1. HDMI input

No. Resolution H-freq(kHz) V-freq.(Hz) Proposed Remark

DTV

1 720*480 31.47 59.94 SDTV 480P

2 720*480 31.5 60 SDTV 480P

3 720*576 31.25 50 SDTV 576P

4 1280*720 44.96 59.94 HDTV 720P

5 1280*720 45 60 HDTV 720P

6 1280*720 37.5 50 HDTV 720P

7 1920*1080 28.125 50 HDTV 1080I

8 1920*1080 33.72 59.94 HDTV 1080I

9 1920*1080 33.75 60.00 HDTV 1080I

10 1920*1080 26.97 23.976 HDTV 1080P

11 1920*1080 27.00 24.000 HDTV 1080P

12 1920*1080 33.71 29.97 HDTV 1080P

13 1920*1080 33.75 30.00 HDTV 1080P

14 1920*1080 56.25 50.00 HDTV 1080P

15 1920*1080 67.432 59.94 HDTV 1080P

16 1920*1080 67.5 60.00 HDTV 1080P

1 640 x 350 @70Hz 31.46 70.09 EGA

2 720 x 400 @70Hz 31.46 70.08 DOS

3 640 x 480 @60Hz 31.46 59.94 VESA(VGA)

4 800 x 600 @60Hz 37.87 60.31 VESA(SVGA)

5 1024 x 768 @60Hz 48.36 60.00 VESA(XGA)

6 1152 x 864 @60Hz 54.34 60.05 VESA

7 1280 x 1024 @60Hz 63.98 60.02 VESA(SXGA) FHD only

8 1360 x 768 @60Hz 47.71 60.01 VESA(WXGA)

9 1920 x 1080 @60Hz 67.5 60.00 WUXGA(CEA 861D) FHD only

Only for training and service purposes

- 9 -

ADJUSTMENT INSTRUCTION

1. Application Range

This specification sheet is applied to all of the LED TV with LD5GG chassis.

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℃ 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℃

▪ 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. Automatic Adjustment

4.1. MAC address D/L , CI+ key D/L , Widevine key D/L, ESN D/L,

HDCP14/20 D/L

▪ Connect: USB port

4.1.1. Communication Prot connection

▪ Com 1,2,3,4 and 115200(Baudrate)

Mode check: Online Only

▪ check the test process

DETECT -> MAC -> ESN -> Widevine -> CI -> HDCP14 -> HDCP20

▪.Play : Press Enter key ▪ Result: Ready, Test, OK or NG ▪ Printer Out (MAC Address Label)

3. Adjustment items

3.1.Main PCB check process

▪ MAC Address Download ▪ CI+ Key Download ▪ Widevine key Download ▪ ESN Download ▪ HDCP(1.4/2.0) Download

Above adjustment items can be also performed in Final Assembly if needed. Both Board-level and Final assembly adjustment items can be check using In-Star Menu ‘1. ADJUST CHECK’.

3.2. Final assembly adjustment

▪White Balance adjustment ▪RS-232C functionality check ▪ PING Test ▪Factory Option setting per destination ▪Ship-out mode setting (In-Stop)

3.3 Etc

▪Ship-out mode ▪Service Option Default ▪USB Download(S/W Update, Option, Service only) ▪ISP Download(Option)

4.2. LAN Inspection

4.2.1. Equipment & Condition

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

4.2.2. LAN inspection solution

▪ LAN Port connection with PCB ▪ Network setting at MENU Mode of TV ▪ Setting automatic IP

Only for training and service purposes

- 10 -

▪ If you want manual connection, enter Network connection

at the HOTEL MENU. Press the Instart button first and blue button after press the etc button, then Network Menu will be appeared.

4.3. LAN PORT INSPECTION(PING TEST)

Connect SET -> LAN port == PC -> LAN Port

4.3.1. 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

(1) (2) (3)

4.2.3. WIDEVINE Key Inspection

- Confirm Key input Data at the “IN START” MENU Mode

4.3.2. 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.

4.4. Model name & Serial number Download

4.4.1. Model name & Serial number D/L

▪

Press “P-ONLY” key of service remote control.(Baud rate :

115200 bps)

▪

Connect RS-232C Signal to USB Cable to USB.

▪

Write Serial number by use USB port.

▪

Must check the serial number at Instart menu.

4.4.2 Method & notice

(1) Serial number D/L is using of scan equipment. (2) Setting of scan equipment operated by Manufacturing

Technology Group.

(3) 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

Only for training and service purposes

- 11 -

※ Manual Download (Model Name and Serial Number)

- If the TV set is downloaded By OTA or Service 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 control. b. Go to the menu ‘7.Model Number D/L’ like below photo. c. Input the Factory model name(ex 55LF630V-ZA) or

Serial number like photo.

d. Check the model name Instart menu → Factory name displayed (ex 55LF630V-ZA) e. Check the Diagnostics (DTV country only) → Buyer model displayed (ex 55LF630V-ZA)

4.5. CI+ Key checking method (check the Section 4.2)

Check whether the key was downloaded or not at ‘In Start’ menu. (Refer to below).

=> Check the Download to CI+ Key value in LGset.

4.5.1. check the method of CI+ Key value

(1) check the method on Instart menu (2) check the method of RS232C Command

1) into the main ass’y mode (RS232 : aa 00 00)

CMD 1 CMD 2 Data 0

A A 0 0

2) check the key download for transmitted command (RS232 : ci 00 10)

CMD 1 CMD 2 Data 0

C I 1 0

(3) result value

- normally status for download : OKx

- abnormally status for download : NGx

4.5.2. check the method of CI+ Key value (RS232)

(1) into the main ass’y mode (RS232 : aa 00 00)

CMD 1 CMD 2 Data 0

A A 0 0

(2) check the mothed of CI+ key by command (RS232 : ci 00 20)

CMD 1 CMD 2 Data 0

C I 2 0

(3) result value

i 01 OK 1d1852d21c1ed5dcx

CI+ Key Value

4.6. WIFI MAC ADDRESS CHECK

(1) Using RS232 Command

Command Set ACK

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

(2) check the menu on in-start

5. Manual Adjustment

5.1. ADC adjustment is not needed because of OTP(Auto ADC adjustment)

5.2. EDID DATA

5.2.1 2D EDID

▪Reference

- HDMI1 ~ HDMI2

- In the data of EDID, below 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 : ‘2015’ → ‘19’ ⓓ Model Name(Hex): LGTV

Chassis MODEL NAME(HEX)

LD5GG 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

8bit

HDMI1 40 1B

HDMI2 40 B

Only for training and service purposes

ⓕ Vendor Specific(HDMI)

INPUT MODEL NAME(HEX)

HDMI1 67 03 0C 00 10 00 80 1E

HDMI2 67 03 0C 00 20 00 80 1E

- 12 -

5.3. White Balance Adjustment

5.3.1 Overview

▪ W/B adj. Objective & How-it-works

- Objective: To reduce each Panel’s W/B deviation

- 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.

- Adj. condition : normal temperature.

1) Surrounding Temperature: 25±5℃

2) Warm-up time: About 5 Min

3) Surrounding Humidity: 20% ~ 80%

4) Before White balance adjustment, Keep power on

status, don’t power off

5.3.2 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

1) After Aging Start, Keep the Power ON status during 5

Minutes.

2) In case of LCD, Back-light on should be checked using

no signal or Full-white pattern.

5.3.3 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 Remote control (4) Video Signal Generator MSPG-925F 720p/204-Gray

(Model: 217, Pattern: 49) ※ Color Analyzer Matrix should be calibrated using CS-1000

5.3.4 Equipment connection MAP

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|ziGGyzTYZYjG

zG

୔pG{}GGGGSGG

5.3.5. Adj. Command (Protocol)

START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS A STOP

- LEN: Number of Data Byte to be sent

- CMD: Command

- VAL: FOS Data value

- CS: Checksum of sent data

- A: Acknowledge Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]

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jG

୔G

wGnG

yzTYZYjG

▪RS-232C Command used during auto-adj.

RS-232C COMMAND

Explanation

[CMD ID DATA]

wb 00 00 Begin White Balance adj.

wb 00 10 Gain adj.(internal white pattern)

wb 00 1f Gain adj. completed

wb 00 20 Offset adj.(internal white pattern)

wb 00 2f Offset adj. completed

wb 00 ff End White Balance adj.

(internal pattern disappears )

Ex) wb 00 00 -> Begin white balance auto-adj. wb 00 10 -> Gain adj. ja 00 ff -> Adj. data jb 00 c0 ... ... wb 00 1f -> Gain adj. complete *(wb 00 20(start), wb 00 2f(endc)) -> Off-set adj. wb 00 ff ->End white balance auto adj.

▪Adj. Map

Adj. item Command

(lower

Data Range (Hex.)

Default (Decimal)

caseASCII)

CMD1 CMD2 MIN MAX

Cool R Gain J g 00 C0 TBD

G Gain J h 00 C0 TBD

B Gain J i 00 C0 TBD

R Cut TBD

G Cut TBD

B Cut TBD

Medium R Gain J a 00 C0 TBD

G Gain J b 00 C0 TBD

B Gain J c 00 C0 TBD

R Cut TBD

G Cut TBD

B Cut TBD

Warm R Gain J d 00 C0 TBD

G Gain J e 00 C0 TBD

B Gain J f 00 C0 TBD

R Cut TBD

G Cut TBD

Only for training and service purposes

- 13 -

5.3.6. Adj. method

5.3.6.1. 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.

5.3.6.2 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 à EZ adjust using adj. R/C à 11. White-

Balance then press the cursor to the right (KEY▶).

- When KEY(▶) is pressed 206 Gray internal pattern will

be displayed.

(4) Adjust Cool modes

1) Fix the one of R/G/B gain to 192 (default data) and decrease the others.

(If G gain is adjusted over 172 and R and B gain less than 192 , Adjust is O.K.)

2) If G gain is less than 172,

Increase G gain by up to 172, and then increase R gain and G gain same amount of increasing G gain.

3) If R gain or B gain is over 255,

Readjust G gain less than 172, Conform to R gain is 255 or B gain is 255

(5) Adjust two modes (Medium / Warm) Fix the one of R/G/B

gain to 192 (default data) and decrease the others.

(6) Adj. is completed, Exit adjust mode using “EXIT” key on

Remote control.

▪ 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

- PDP: Color Analyzer (CA-100, CA-100+, CA210) probe

should be firmly attached to the Module

- LCD: Color Analyzer (CA-210) probe should be within

10cm and perpendicular of the module surface (80°~ 100°)

5.3.7. 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 0.271 0.270 13000K 0.0000

Medium 0.286 0.289 9300K 0.0000

Warm 0.313 0.329 6500K 0.0000

▪ Standard color coordinate and temperature using

CA-210(CH 14)

Mode Coordinate Temp △uv

x y

Cool 0.271±0.002 0.270±0.002 13000K 0.0000

Medium 0.286±0.002 0.289±0.002 9300K 0.0000

Warm 0.313±0.002 0.329±0.002 6500K 0.0000

5.3.8. LED White balance table

▪ Edge LED module change color coordinate because of

aging time

▪ Apply under the color coordinate table, for compensated

aging time

- Only march to December.

NC4.0 Aging

time

(Min)

1 0-2 282 289 297 308 324 348

2 3-5 281 287 296 306 323 346

3 6-9 279 284 294 303 321 333

4 10-19 277 280 292 299 319 339

5 20-35 275 277 290 296 317 336

6 36-49 274 274 289 293 316 333

7 50-79 273 272 288 291 315 331

8 80-119 272 271 287 290 314 330

9 Over 120 271 270 286 289 313 329

Cool Medium Warm

X y x y x y

271 270 286 289 313 329

Only for training and service purposes

- 14 -

- Only January to Febuary.

NC4.0 Aging

time

(Min)

1 0-5 286 295 301 314 328 354

2 6-10 284 290 299 309 326 349

3 11-20 282 287 297 306 324 346

4 21-30 279 283 294 302 321 342

5 31-40 276 278 291 297 318 337

6 41-50 274 275 289 294 316 334

7 51-80 273 272 288 291 315 331

8 81-119 272 271 287 290 314 330

9 Over 120 271 270 286 289 313 329

Cool Medium Warm

X y x y x y

271 270 286 289 313 329

5.5. HDMI ARC Function Inspection

5.5.1. Test equipment

- Optic Receiver Speaker

- MSHG-600 (SW: 1220 ↑)

- HDMI Cable (for 1.4 version)

5.5.2. Test method

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

master equipment (HDMI1)

- O/S Module (AUO, INX, Sharp, CSOT, BOE) (SPEC : Cool 13000K)_DV

Cool med warm

x y x y x y

spec 271 270 286 289 313 329

target 278 280 293 299 320 339

5.4. Magic Remote control test

- Results are automatically marked in Instart OSD after through the AP/Magic Remote control Equipment on the line.

(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.

Only for training and service purposes

- 15 -

5.6. EYE-Q Green Function Inspection

(1) Turn on the TV.. (2) Press 'EYE button' on the adjustment remote control. (3) Cover 'Eye Q sensor' on the front of set with your hands,

hold it for 6 seconds.

(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.

(5) Uncover your hands from Eye Q sensor, hold it for 6

seconds.

(6) Check "Back Light(xxx)" on the screen, check data

increase.

- You should change Eye Q sensor.

5.7. Wi-Fi Test

(1) Turn on TV (2) Select Wi-Fi Connection option in Network Menu. Press the Instart button first and blue button after press the etc button, then Network Menu will be appeared.

(1) (2) (3)

(3) Click Off Button to On in Wi-Fi Connection.

Only for training and service purposes

- 16 -

(4) The system finds any AP like blow PIC.

(5) Select the AP you want to connect.

5.8. LNB voltage and 22KHz tone check (only for DVB-S/S2 model)

5.8.1. Test method

(1) Set TV in Adj. mode using POWER ON. (2) Connect cable between satellite ANT and test JIG. (3) Press Yellow Key (ETC+SWAP) in Adj Remote control to

make LNB on. (4) check LED light ‘ON’ at 18V menu. (5) check LED light ‘ON’ at 22KHz tone menu. (6) Press Blue Key (ETC+PIP INPUT) in Adj Remote control

to make LNB off. (7) check LED light ‘OFF’ at 18V menu. (8) check LED light ‘OFF’ at 22KHz tone menu.

5.8.2. Test result

(1) After press LNB On key, ‘18V LED’ and ‘22KHz tone LED’

should be ON. (2) After press LNB OFF key, ‘18V LED’ and ‘22KHz tone

LED’ should be OFF.

6. Ship-out mode and GND/Hi-pot check

6.1. 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.

6.2. GND and Hi-pot auto-check

6.2.1 Method

(1) GND & Hi-pot auto-check preparation

- Check that Power Cord is fully inserted to the SET. (If loose, re-insert)

(2) Perform GND & Hi-pot 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.

7. Audio

No Item Min Ty p Max Unit Remark

1. Audio practi-

cal max Output,

L/R

(Distor-

tion=10%

max

Output)

2. Speaker

(6Ω

Imped-

ance)

9 10 12 W EQ Off

8.10 10.8 Vrms

4.5 5 6 W EQ Off

5.5 6 Vrms

9 10 12 W EQ Off

4.5 5 6 W EQ Off

AVL Off

Clear

Voice Off

AVL Off

Clear

Voice Off

AVL Off

Clear

Voice Off

AVL Off

Clear

Voice Off

40/43/49/55 LX761H-ZA

32LX761H-ZA

40/43/49/55 LX761H-ZA

32LX761H-ZA

- Measurement condition:

1) RF input: Mono, 1KHz sine wave signal, 100% Modulation

2) CVBS, Component: 1KHz sine wave signal 0.5Vrms

8. USB S/W Download (option, Service only)

(1) Put the USB Stick to the USB socket (2) Go to General menu then enter to About This TV

(3) Enter the USB EXPERT MODE

6.2.2 Checkpoint

▪ TEST voltage

(1) DQA Test

- GND : AC 1.5KV/1min, Cut off current not exceed 100mA

- SIGNAL : AC 3.0KV/1min, Cut off current not exceed 100mA

(2) Mass Production Line Test

- GND : AC 1.5KV/1sec, Cut off current not exceed 100mA

▪ TEST time: DQA 1min, Mass Production Line 1 sec ▪ TEST POINT

- GND TEST = POWER CORD GND & SIGNAL CABLE METAL GND

- Hi-pot TEST = POWER CORD GND & LIVE & NEUTRAL

▪ LEAKAGE CURRENT: At 0.5mArms

Only for training and service purposes

- 17 -

(4) Updating is staring. (5) Updating Completed, The TV will restart automatically (6) If your TV is turned on, check your updated version and

Tool option. (explain the Tool option, next stage)

* 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, have to adjust TOOL OPTION again.

1) Push "ADJ" key in service Remote control.

2) Select "Tool Option 1" and Push “OK” button.

3) Punch in the number. (Each model has their number.)

9. Check Commercial features

Commercial Feature

inch IR Out DC Power

32/40/43/

49/55

O O O X O X

Out

(5V/12V)

9.1. External SPK Out

Ext

SPK

Out

RJP

(RJ-45

interface)

Pro:Idiom b-LAN

9.2. IR Out & DC Power Outlet(5V/12V)

9.2.1. IR Out Equipment & Condition

▪ Simple Jig (commercial check JIG) ▪ Power only mode

(1) Connect each other RS232C port on the Commercial

Check JIG (2) Press any key on SVC Remote-control (3) Check the LED status of the Check JIG.

- IR LED(OK condition: blinking) (LED #1)

9.1.1. Equipment & Condition

▪ Jig (Speaker out JIG) or Oscilloscope

9.1.2. Check the speaker out

(1) Connect external speaker to speaker out port with phone

jack on TV side as below.

(2) Check the Max. speaker output is 1W or not. Sine wave

with 1KHz will be displayed.

(3) Press Vol. control button up/down in turns and check the

waveform of Oscilloscope.

Button of Vol. control Waveform of Oscilloscope

UP(+)

DOWN(-)

9.2.2. DC Power Outlet Equipment & Condition

▪ Simple Jig (commercial check JIG)

(1) Connect JIG for inspection to RS-232C port on TV as

below. (2) Enter the Configuration Setup mode in pressing Remote

control keys.

The method to enter Configuration Setup mode IN-START

→ MENU → Configuration Setup → OK

1) Select 5V DC Power Outlet and change the setting : Off

→ 5V. After that, check LED color in JIG.(LED #1)

2) After checking 5V DC Power Outlet, change the setting :

5V → Off

3) Please check 12V DC Power Outlet in the same procedure.

▪ Power only mode

1) Connect JIG for inspection to RS-232C port on TV

2) Press red key on SVC Remote control with etc key.

3) Check the LED status of check JIG.

- LED status of the check JIG (5V -> 12V -> Off)

Only for training and service purposes

- 18 -

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