LG 49UX340C Schematic

Internal Use Only

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LED TV

SERVICE MANUAL

CHASSIS : LA5CP

MODEL : 49UX340C 49UX340C-UA

MODEL : 49UX340H 49UX340H-UA

CAUTION

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

Printed in KoreaP/NO : MFL69152116 (1506-REV00)

CONTENTS

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

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

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

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

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

TROUBLESHOOTING GUIDE ................................................................ 14

BLOCK DIAGRAM .................................................................................. 23

EXPLODED VIEW .................................................................................. 24

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 mod-

ule 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 solder

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 spec sheet is applied LED TV with LA5CP 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 specification

4. General Specification

No Item Specication Result Remark

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

2. Available Channel 1) VHF : 02~13

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

4. Market NORTH AMERICA

5. Screen Size 60/65 inch Wide (1920 × 1080) FHD + 120Hz All models without HD models

6. Aspect Ratio 16:9

7. Tuning System FS

8. Module Direct LC430EQE-FHM2 LGD 43UX340C/H-UA

9. Operating Environment 1) Temp : 0 ~ 40 deg

10. Storage Environment 1) Temp : -20 ~ 60 deg

2) UHF : 14~69

3) DTV : 02-69

4) CATV : 01~135

5) CADTV : 01~135

42/43/49/55 inch Wide (1920 × 1080) FHD + 60Hz All models without HD models

28/32 inch Wide (1366 × 768) HD + 60Hz

LC490EQE-FHM2 LGD 49UX340C/H-UA

LC550EQE-FHM2 LGD 55UX340C/H-UA

LC650EQF-FHM2 LGD 65UX340C/H-UA

LC790EQF-FHM1 LGD 79UX340C/H-UA

2) Humidity : ~ 80 %

2) Humidity : ~ 85 %

Only for training and service purposes

- 6 -

5. Supported video resolutions

5.1. RGB Input (PC)

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

1. 640*350 31.46 70.09 25.17 EGA X

2. 720*400 31.46 70.08 28.32 DOS O

3. 640*480 31.46 59.94 25.17 VESA(VGA) O

4. 800*600 37.87 60.31 40.00 VESA(SVGA) O

5. 1024*768 48.36 60.00 65.00 VESA(XGA) O

6. 1152*864 54.34 60.05 81.62 VESA O

7. 1360*768 47.71 60.01 85.50 VESA (WXGA) O

8. 1280*1024 63.98 60.02 108.0 VESA (SXGA) O

9. 1920*1080 67.50 60.00 148.5 HDTV 1080P O

5.2. Component input(Y, CB/PB, CR/PR)

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

1. 720*480 15.73 60.00 13.513 SDTV ,DVD 480I

2. 720*480 15.73 59.94 13.500 SDTV ,DVD 480I

3. 720*480 31.50 60.00 27.027 SDTV 480P

4. 720*480 31.47 59.94 27.000 SDTV 480P

5. 1280*720 45.00 60.00 74.250 HDTV 720P

6. 1280*720 44.96 59.94 74.176 HDTV 720P

7. 1920*1080 33.75 60.00 74.250 HDTV 1080I

8. 1920*1080 33.72 59.94 74.176 HDTV 1080I

9. 1920*1080 67.50 60.00 148.500 HDTV 1080P

10. 1920*1080 67.432 59.94 148.352 HDTV 1080P

11. 1920*1080 27.00 24.00 74.250 HDTV 1080P

12. 1920*1080 26.97 23.976 74.176 HDTV 1080P

13. 1920*1080 33.75 30.00 74.250 HDTV 1080P

14. 1920*1080 33.71 29.97 74.176 HDTV 1080P

Only for training and service purposes

- 7 -

5.3. HDMI Input 1 (PC/DTV)

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

PC (DVI) DDC

1. 640*350 31.46 70.09 25.17 EGA X

2. 720*400 31.46 70.08 28.32 DOS O

3. 640*480 31.46 59.94 25.17 VESA(VGA) O

4. 800*600 37.87 60.31 40.00 VESA(SVGA) O

5. 1024*768 48.36 60.00 65.00 VESA(XGA) O

6. 1152*864 54.34 60.05 81.62 VESA O

7. 1360*768 47.71 60.01 85.50 VESA (WXGA) O

8. 1280*1024 63.98 60.02 108.0 VESA (SXGA) O

9. 1920*1080 67.50 60.00 148.5 HDTV 1080P O

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 67.43 59.94 148.352 HDTV 1080P

9 1920*1080 27.00 24.00 74.25 HDTV 1080P

10 1920*1080 26.97 23.97 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

Only for training and service purposes

- 8 -

ADJUSTMENT INSTRUCTION

1. Application

This spec. sheet applies to LA5CP 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 ºC 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) At first Worker must turn on the SET by using Power Only

key. (6) The receiver must be operated for about 5 minutes prior to

the adjustment when module is in the circumstance of over

ºC

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. Main PCBA Adjustments

(1) ADC adjustment : ADC adjustment is OTP (Auto ADC) (2) EDID download : HDMI

■ 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-Start Menu (1.Adjust Check).

Component 1080p and RGB-PC Adjust will be calculated by

480i adjust value

4. MAIN PCBA Adjustments

4.1. ADC Adjustment

4.1.1. Overview

▪ ADC adjustment is needed to find the optimum black level

and gain in Analog-to-Digital device and to compensate RGB deviationI

4.1.2. Equipment & Condition

(1) Protocol: RS-232C (2) Inner Pattern

- Resolution : 1024*768(RGB)

- Pattern : Horizontal 100% Color Bar Pattern

- Pattern level : 0.7±0.1 Vp-p

4.1.3. Adjustment

4.1.3.1. Adjustment method

- Connect to Jig by using RS-232(USB), adjust RGB

* Manual adj (If needed in Final Assembly)

- Required equipment : Adjustment R/C

- Enter Service Mode by pushing “ADJ” key,

- Start ‘OTP’ ADC Type by pushing ‘►’ key at [7. ADC

Calibration]

4.1.3.2. Adj. protocol (only Internal patten)

Protocol CMD 1 CMD 2 Data 1 Data 2 Remark

Enter adj mode

Start ADC adj

4.1.3.3. ADC RGB (1) Press the In-start Key on the ADJ remote after at least 1

min of signal reception. Then, select ADC Calibration. And Press OK Button on the menu “Start”. The adjustment will start automatically.

(2) If ADC RGB is successful, “ADC RGB Success” is

displayed and ADC RGB is completed. If ADC calibration is failure, “ADC RGB Fail” is displayed.

(3) If ADC calibration is failure, after rechecking ADC pattern

or condition, retry calibration

a a 00 00 When transfer the

‘Mode In’,Carry the command.

a d 00 10 Automatically

adjustment (Use internal pattern)

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) Shipment conditions (2) Tool option menu (3) USB Download (S/W Update, Option and Service only) (4) Preset CH Information

Only for training and service purposes

- 9 -

4.2. EDID Download

4.2.1. 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”.

4.2.2. Equipment

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

cable is not need.

(2) Adjust by using remote controller

4.2.3. 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 HDMI

Cable.

4.2.3.1. Models for EDID Data DTS

Ver 0.10

RGB 87 FF FF

HDMI1 6E8D E68D E646

HDMI2 6E7D E67D E636

PCM Ver 0.10

RGB 87 FF FF

HDMI1 6E08 E608 E6C1

HDMI2 6EF8 E6F8 E6B1

AC3 Ver 0.10

RGB 87 FF

HDMI1 6E96 E696

HDMI2 6E86 E686

not Deep Color, DTS + AC3 + PCM

8Bit_HD 8Bit_FHD 10Bit_FHD

not Deep Color, PCM

8Bit_HD 8Bit_FHD 10Bit_FHD

not Deep Color, AC3 + PCM

8Bit_HD 8Bit_FHD 10Bit_FHD

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.

- Case : Cool Mode To adjust the white balance without the saturation, G gain should be adjust at least 172 and change the others (R,B Gain) * When R or B gain is over 255, G gain can be adjust

below 172)

- Case : Medium / Warm Mode To adjust the white balance without the saturation, Fix the one of R/G/B gain to 192 (default data) and decrease the others.

(3) Adj. condition: normal temperature

- Surrounding Temperature: 25±5 ºC

- 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 Power 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) Video Signal Generator MSPG-925F 720p/204-Gray

(Model:217, Pattern:49)

→ Only when internal pattern is not available

※ Color Analyzer Matrix should be calibrated using

CS-1000

Only for training and service purposes

- 10 -

5.1.3. Equipment connection

Color Analyzer

Probe

RS- 232C

Pattern Generator

Signal Source

* If TV internal pattern is used, not needed

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

Wb 00 00 Begin White Balance adj.

Wb 00 ff End White Balance adj.

(internal pattern disappears )

(2) Adjustment Map

Command

Adj. item

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

(lower case ASCII)

CMD1 CMD2 MIN MAX

Explanation

Data Range

(Hex.)

Default

(Decimal)

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.

5.1.5.2. 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 -> 6. White-

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

(When KEY(►) is pressed 204 Gray(80IRE) internal

pattern will be displayed)

(4) Adjust modes (Cool) : Fix the G gain at least 172 and

change the others (R/B Gain). * If R or B gain is over 255, G gain can be adjust below 172 (5) Adjust two modes ( Medium / Warm) : Fix the one of R/G/B

gain to 192 (default data) and decrease the others

※ CASE First adjust the coordinate far away from the target value(x, y). (1) x, y > target (2) x, y < target (3) x >target , y < target (4) x < target , y > target

- Every 4 case have to fit y value by adjusting B Gain and then

fit x value by adjusting R-Gain

- In this case, increasing/decreasing of B Gain and R Gain can

be adjusted.

► How to adjust

(1) Fix G gain at least 172 Adjust R, B Gain (In Case of Mostly Blue Gain Saturation) (2) When R or B Gain > 255, Release Fixed G Gain and

Readjust

※ CASE Medium / Warm First adjust the coordinate far away from the target value(x, y). (1) x, y > target i) Decrease the R, G. (2) x, y < target i) First decrease the B gain, ii) Decrease the one of the others. (3) x > target , y < target i) First decrease B, so make y a little more than the target. ii) Adjust x value by decreasing the R (4) x < target , y > target i) First decrease B, so make x a little more than the target. ii) Adjust x value by decreasing the G

Only for training and service purposes

- 11 -

5.1.6. Reference (White Balance Adj. coordinate and color

temperature)

▪ Luminance: 204 Gray, 80IRE ▪ Standard color coordinate and temperature using

CA-210(CH-14) – by aging time

Mode

Cool 0.271 0.270 13,000K 0.0000

Medium 0.286 0.289 9,300K 0.0000

Warm 0.313 0.329 6,500K 0.0000

▪ Standard color coordinate and temperature using CA-210

(1) LGD , 65”AUO and 50” AUO module

Mode

Cool 0.269±0.002 0.273±0.002 13,000K 0.0000

Medium 0.286±0.002 0.289±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 0.286±0.002 0.289±0.002 9,300K 0.0000

Warm 0.313±0.002 0.329±0.002 6,500K 0.0000

▪ Normal line (March ~ December) ▪ Standard color coordinate and temperature using

CA-210(CH-14) – by aging time

Aging

5.0

time

(Min)

1 0-2 282 289 297 308 324 348 2 3-5 281 287 296 306 323 346 3 6-9 279 284 294 303 321 343 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

▪ LGD TN Module(

spec 286 289 295 305 313 329

target 286 289 295 305 313 329

Coordinate

x y

Coordinate

x y

Coordinate

x y

Cool Medium Warm

x y x y x y

271 270 286 289 313 329

Cool temp Spec is

Cool Medium Warm

x y x y x y

Temp △uv

6500K)

5.2. Option selection per country

5.2.1. Overview

(1) Tool option selection is only done for models in Non-USA

North America due to rating (2) Applied model: LA4AA Chassis applied to CANADA and

MEXICO

5.2.2. Country Group selection

(1) Press ADJ key on the Adj. R/C, and then select Country

Group Menu (2) Depending on destination, select US, then on the lower

Country option, select US, CA, MX. Selection is done using +, - KEY

5.2.3. Tool Option inspection

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

5.3. 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. GND and HI-POT Test

6.1. GND & HI-POT auto-check preparation

(1) Check the POWER CABLE and SIGNAL CABE insertion

condition

6.2. GND & HI-POT auto-check

(1) Pallet moves in the station. (POWER CORD / AV CORD is

tightly inserted) (2) Connect the AV JACK Tester. (3) Controller (GWS103-4) on. (4) GND Test (Auto)

- If Test is failed, Buzzer operates.

- If Test is passed, execute next process (Hi-pot test).

(Remove A/V CORD from A/V JACK BOX)

(5) HI-POT test (Auto)

- If Test is failed, Buzzer operates.

- If Test is passed, GOOD Lamp on and move to next

process automatically

6.3. 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

Only for training and service purposes

- 12 -

7. AUDIO output check

5HFRPPHQGHG,QSXW6LJQDO

 5)N+]6LQHZDYH

7.1. Audio input condition

(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation (2) CVBS, Component: 1KHz sine wave signal (0.4Vrms) (3) RGB PC: 1KHz sine wave signal (0.7Vrms)

7.2. Specification

No Item Min Typ Max Unit Remark

1 Audio practi-

cal max Output, L/R (Distortion=10% max Output)

2 Audio practi-

cal max Output, L/R (Distortion=10% max Output)

9.0

8.5

9.0

8.5

10.0

8.9

10.0

8.9

12.0

9.9WVrms

12.0

9.9WVrms

(1) Measurement

condition

- EQ/AVL/Clear Voice: Off

(2) Speaker (8Ω

Impedance)

(3) 32/37/42/47/55/60

INCH

(1) Measurement

condition

- EQ/AVL/Clear

Voice: Off

(2) Speaker (8Ω

Impedance)

(3) 26 INCH

8. 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”

9. Test factor for commercial model

9.1. RJP TEST (Only US model)

RJP port

9.1.1. Overview

▪ Jig(Commercial Check JIG) ▪ RJ45 cable ▪ Power only mode

9.1.2. Test sequence

(1) Operate JIG(Commercial Check JIG) as shown on picture1 (2) Turn on TV and press “P-ONLY” key on adjustment

remocon. (3) Connect RJ45 cable into RJP port of the TV set. (4) Connect RJ45 cable into the JIG. (5) If shown “OK” it’s normal, “NG” it’s defect. (6) If defect, check the connection once again as done above. (7) If the signal power is no good, check the connection of RF

cable.

10. External Speaker Out

(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.

* 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.)

Only for training and service purposes

- 13 -

(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) Check Both of the signal in speaker. (Power only mode -> Fived 1W Default)

-> Check the input signal(1KHZ, Sine wave) and the wave

of output by utilizing oscilloscope

TROUBLE SHOOTING

1. No video (Main IC Block)

Audio

Check Audio (Speaker out)

Audio NG

Next page (Back-end block)

Check stand-by voltage 3.5V

P401/P402 5,7,8 pin

Check stand-by voltage 3.5V

L400,L401,ZD400,C400,C407

Check X-TAL X101 Replace X101

Check POWER ON signal

P401/P402 1 pin

High

Check multi voltage 12V, 24V

P401/P402 11,12,13,14,15p : 12V

P401/P402 18,19,20,21p : 24V

NG NG NG

Low

Check Power connector

L400,L401,ZD400,C400,C407

Download software (Main)

Check Power connector

(24pin/28pin)

Replace

(24pin/28pin)

Short check

stand-by voltage 3.5V

Replace IC101

or Main Board

Short check

multi voltage 12V, 24V

Replace

Power board.

Replace

Power board.

Check Main IC power block

IC404 : 1.5V , Q406 : 3.3V

IC403 : 1.1V

Only for training and service purposes

Replace IC404, Q406, IC403

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