LG 28LH4530-PU Schematic

Download

Page 1

Internal Use Only

LED TV

SERVICE MANUAL

CHASSIS :

MODEL :

CAUTION

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

LU60A

28LH4530 28LH4530-PU

P/NO :

MFL69169513 (1611-REV00)

Page 2

CONTENTS

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

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

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

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

ADJUSTMENT INSTRUCTION ................................................................ 8

TROUBLE SHOOTING ........................................................................... 12

BLOCK DIAGRAM .................................................................................. 16

EXPLODED VIEW .................................................................................. 17

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

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LGE Internal Use Only

Page 3

AC Volt-meter

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 1W), keep the resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock.

Leakage Current Cold Check(Antenna Cold Check)

With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check. Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to

0.5mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.

Leakage Current Hot Check circuit

Good Earth Ground such as WATER PIPE,

To Instrument's exposed METALLIC PARTS

When 25A is impressed between Earth and 2nd Ground for 1 second, Resistance must be less than 0.1

*Base on Adjustment standard

0.15µF

1.5 Kohm/10W

CONDUIT etc.

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LGE Internal Use Only

Page 4

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 conflict 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 specified 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 flammable mixture. Unless specified 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 fixtures specified in this service manual.

CAUTION: Do not connect the test fixture 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 field-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 classified as "anti-static" can generate electrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient 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 floor can generate static electricity sufficient 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 1.25cm) 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 flows 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.

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Page 5

IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat 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.

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.

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.

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.

3. Solder the connections.

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.

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Page 6

SPECIFICATION

NOTE : Specications and others are subject to change without notice for improvement.

1. Application Range

This spec sheet is applied all of the TV used LU60A chassis.

2. Specication

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 (100 V - 240 V ~, 50 / 60 Hz)

· Standard Voltage of each products is marked by models

4) Specication and performance of each parts are followed

each drawing and specication by part number in accord-

ance 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 specication

- Safety : UL

- EMI : FCC

4. Model general specication

No Item Specication Remarks

1 Market AMERICA, CANADA, MEXICO LH4530 series is US only

MT48x Series is Mexico only.

2 Receiving system ATSC / NTSC-M / 64 & 256 QAM

3 Available Channel VHF 2-13, UHF 14-69, CATV 1-135, DTV 2-69, CADTV 1-135

4 Interface RF / Composite(CVBS) / Component / HDMI / D-Sub / USB 22,24LH4530 serise : RF/ HDMI/

USB(SVC only) 28LH4530 : RF/ HDMI/USB MT48x serise : RF, Component/ CVBS/ HDMI/ DSUB/ USB

5. Feature and Function

No Item Specication Remarks

1 RF Input Analog NTSC

DTV ATSC

2 HDMI Input (Rear) HDMI version 1.4/ support PC

Support HDCP

3 Component Input

(Rear, 1EA)

4 CVBS Input ATSC/NTSC-M common port with Component.

Y/Pb/Pr LH4530 not support

Rear : 1EA

5 USB (Side, 1EA) For My Media(Photo/Music List) 22,24LH4530 not support

Picture + Music

6 D-Sub RGB-PC LH4530 not support

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Page 7

5. External Input Support Format

- RGB/HDMI (PC) *LH4530 doesn’t support RGB

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

1 720*400 31.468 70.080 28.321

2 640*480 31.469 59.940 25.175

3 640*480 37.500 75.000 31.500

4 800*600 37.879 60.317 40.000

5 800*600 46.875 75.000 49.500

6 1024*768 48.363 60.004 65.000

7 1024*768 60.023 75.029 78.750

8 1280*800 49.702 59.81 83.500

9 1366*768 47.717 59.79 85.5

- HDMI (DTV)

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

1 720* 480 31.469 / 31.5 59.94 / 60 27.00/ 27.03 SDTV 480P

2 720*576 31.25 50.00 27.864 SDTV 576P

3 1280*720 37.50 50.00 74.250 HDTV 720P

4 1280* 720 44.96 / 45 59.94 / 60 74.17/ 74.25 HDTV 720P

5 1920* 1080 33.72 / 33.75 59.94 / 60 74.17/ 74.25 HDTV 1080I

6 1920* 1080 28.125 50.00 74.25 HDTV 1080I

7 1920* 1080 27.00 24 74.25 HDTV 1080P

8 1920* 1080 33.75 30.00 74.25 HDTV 1080P

9 1920* 1080 56.250 50 148.5 HDTV 1080P

10 1920* 1080 67.43 / 67.5 59.94 / 60 148.35/ 148.50 HDTV 1080P

- Component *LH4530 doesn’t support RGB

1 720x480 15.730 59.940 720x480i

2 15.750 60.000

3 31.470 59.940 720x480p

4 31.500 60.000

5 720x576 15.625 50.000 720x576p

6 31.250 50.000

7 1280x720 44.960 59.940 1280x720p

8 37.500 50.000

9 1920x1080 33.720 59.940 1920x1080i

10 33.750 60.000

11 28.125 50.000 1920x1080p

12 56.250 50.000

13 67.432 59.940

14 67.500 60.000

- Video Color Format : YcbCr 444, 422 (xvYcc is not supported)

Resolution H-freq(kHz) V-freq(Hz)

Specication

45.000 60.000

Remark

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Page 8

ADJUSTMENT INSTRUCTION

(2)

(6)

(5)

1. Application Range

This document is applied all of monitor TV models with LU60A chassis..

2. Designation

1) The adjustment is according to the order which is designat-

ed and which must be followed, according to the plan which can be changed only on agreeing.

2) Power adjustment : Free Voltage.

3) Magnetic Field Condition: Nil.

4) Input signal Unit: Product Specication Standard.

5) Reserve after operation: Above 5 Minutes (Heat Run)

Temperature : at 25 °C ± 5 °C Relative humidity : 65 % ± 10 %

Input voltage : 220 V, 60 Hz

6) Adjustment equipments : Color Analyzer (CA-210 or CA-

110), DDC Adjustment Jig equipment, SVC remote controll.

7) Push The "IN STOP KEY" – For memory initialization

Case1 : Software version up

1) After downloading S/W by USB , Multi-vision set will reboot automatically

2) Push "In-stop" key

3) Push "Power on" key

4) Function inspection

5) After function inspection, Push "In-stop" key.

Case2 : Function check at the assembly line

1) When TV set is entering on the assembly line, Push "In-

stop" ke y at rst.

2) Push "Power on" key for turning it on.

→ If you push "Power on" key, TV set will recover channel

information by itself.

3) After function inspection, Push "In-stop" key.

4) Click “Read” tab, and then load download le(XXXX.bin) by

clicking “Read”

(4)

filexxx.bin

5) Click “Auto” tab and set as below

6) Click “Run”.

7) After downloading, check “OK” message.

(5)

(7) ……….OK

* USB DOWNLOAD

1) Make New folder named “LG_DTV” and put ISP le(*.bin)

in the folder.

2) Put the USB Stick to the USB socket.

3) 3 Automatically detecting update le in USB Stick

- If your downloaded program version in USB Stick is Low, it didn’t work. But your downloaded version is High, USB data is automatically detecting.

4) TV Software Upgrade feature will be displayed.

3. Main PCB check process

* APC - After Manual-Insult, executing APC

* Boot le Download

1) Execute ISP program “Mstar ISP Utility” and then click

“Cong” tab.

2) Set as below, and then click “Auto Detect” and check “OK” message. If display “Error”, Check connect computer, jig, and set.

3) Click “Connect” tab. If display “Can’t ”, Check connect computer, jig, and set.

(1) (3)

Please Check the Speed :

Use the speed under

200KHz.

5) Updating is starting.

6) Updating Completed, The TV will restart automatically.

* After downloading, have to adjust TOOL OPTION again.

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Page 9

3.1. EDID Process

012345678

9AB

CDE

FFFFFFFFFF

1E6DC8

111

1101191

331D78EA62

75A355

2720125054

314F454F614F81

011

11111

662156AA5101E3046

01E000FD0

384B1E

2020202020

000FC0

44204844204C472054

560A20

000

2020202020202020202020

200B1

012345678

9AB

CDE

FFFFFFFFFF

111

1101191

331D78EA62

75A355

125054

314F454F614F81

0113011111

662156AA5101E3046

01E000FD0

384B1E

2020202020

000FC0

44204844204C472054

560A20

000

2020202020202020202020

20196

012345678

9AB

221011

131214

1F716

23957766

30C0100801

51D01E203888150565021

8018711C1620582C250565021

09E1

1D80D0721C

1620102C25

80C48E5021

09E2

3A80D0

382D40

102C45

01E2

801871

382D40

582C70

450565021

01E0000000

3.1.1. EDID download

1) Press “Power only” key of service remote controll.

2) Press the “ADJ” Key of service remote controll.

3) Enter EDID D/L mode by pushing “►” key at “EDID D/L”.

4) Select “Start” menu to download EDID data.

5) Check the “OK” message.

6) Press EXIT key on R/C.

→ Caution: Do not connect HDMI Cable when download

EDID

* Edid data and Model option download (RS232)

NO Item CMD 1CMD 2Data 0

- HDMI : Checksum : 96 F0

Enter

download

MODE

EDID data and

Model option

download

Download ‘Mode In’

Download A E 00 10 Automatically download

A A 0 0 When transfer the

→ Caution

* Use the proper signal cable for EDID Download

- Analog EDID : Pin3 exists

- Digital EDID : Pin3 exists

3.1.2. EDID Data

- a. RGB : Checksum – B1

‘Mode In’,

Carry the command.

(The use of a internal

Data)

3.2. Function Check

3.2.1. Check display and sound

*Check Input and Signal items. (cf. work instructions)

1) TV

2) AV (SCART/CVBS)

3) COMPONENT (480i)

4) HDMI * Display and Sound check is executed by Remote controll.

→ Caution : Not to push the INSTOP KEY after completion if

the function inspection.

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Page 10

4. Total Assembly line process

*Connection

4.1. Tool option & ADC Check

1) Press “Power on” key of service remote control.

2) Connect D-SUB cable D-SUB jack for RS232.

3) Check the 'Tool Option' (Refer to the BOM Comments or Adjustment spec)

4) Check the ‘ADC’ is ok

4.2. Model name & Serial number Download

4.2.1. Model name & Serial number D/L

1) Press "Power on" key of service remote control.

2) Connect RS232 Signal Cable to RS-232 Jack.

3) Write Serial number by use RS-232.

4) Must check the serial number at the Diagnostics of SET UP menu.

4.2.2. Method & notice

1) Model Name & 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

4) Check the model name Instart menu → Factory name

displayed (ex 24LN4500)

5) Check the Diagnostics (DTV country only) → Buyer model

displayed (ex 24LN4500)

4.3. Function Check

4.3.1. Check display and sound

*Check Input and Signal items. (cf. work instructions)

1) TV

2) AV (SCART/CVBS)

3) COMPONENT (480i)

4) HDMI

* Display and Sound check is executed by Remote controll.

4.4. White balance adjustment

-Equipment

1) Color Analyzer: CA-210 (LED Module : CH 14)

2) Adj. Computer(During auto adj., RS-232C protocol is needed)

3) Adjust Remocon

RGB_Gains are xed data for each model.

Insert RS-232C Jack which is connected with PC for White Balance or equivalent device. * Total Assembly line should be check whether the color

coordinate(x,y) data refer to below table were meet or not. Color coordinate is differ from panel’s characteristics of color temperature. Please check panel characteristics about color temperature.

- Cool Panel

Color Temperature

Luminance (cd/m²)

*Note : *Note : x,y coordinates are drifted about 0.005 after

▪ White Balance Default value

MT48

LH4530

Cool 13,000 °K X=0.276 (±0.04)

Medium 9,300k °K X=0.291 (±0.04)

Warm 6,500k °K X=0.318 (±0.04)

Cool Min : 80 Typ : 110 <Test Signal>

Medium Min : 80 Typ : 110

Warm Min : 70 Typ : 110

Y=0.275 (±0.04)

Y=0.294 (±0.04)

Y=0.334 (±0.04)

<Test Signal> Inner pattern (204gray,80IRE)

Inner pattern (204gray,80IRE)

30 mins heat-run. So checking color coordinate within 5-min at total assembly line, consider x,y coordinates might be up to 0.005 than x,y target of each color temperature

Gain Cut

R G B R G B

22MT48

22LH4530

24MT48

24LH4530

28MT48

28LH4530

LGD

Cool 121 126 192 128 128 128

(AH-

Medium 165 172 210 128 128 128

IPS / FHD)

Warm 186 185 192 128 128 128

CMI

Cool 171 172 208 128 128 128

LE2

Medium 192 192 188 128 128 128

(VA /

HD)

Warm 192 162 122 128 128 128

BOE

Cool 182 172 222 140 140 140

(VA /

Medium 192 173 192 140 140 140

HD)

Warm 192 168 130 140 140 140

→ Caution : Not to push the INSTOP KEY after completion if

the function inspection.

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Page 11

*Auto-control interface and directions

Color Analyze r

Comput er

Pattern Generator

※

※If TV internal pattern is used, not needed

Signal Source

Probe

RS-232C

DFT JIG

RGB Cable

1) Adjust in the place where the inux of light like oodlight

around is blocked. (Illumination is less than 10ux).

2) Adhere closely the Color Analyzer ( CA210 ) to the module less than 10cm distance, keep it with the surface of the Module and Color Analyzer’s Prove vertically.(80~100°).

3) Aging time

- After aging start, keep the power on (no suspension of

power supply) and heat-run over 5 minutes.

- Using ‘no signal’ or ‘full white pattern’ or the others,

check the back light on.

* When doing Adjustment, Please make circumstance as

below.

4.5. Model Name & SW Version & Adjust check.

* Press the ‘Instart’ key of ADJ remote controll

4.5.1. Model Name& SW Version Check

1) Check ‘Model Name’.

2) Check ‘S/W Version’ (Refer to the IC Ver. in the BOM)

* Auto adjustment Map(RS-232C) RS-232C COMMAND [ CMD ID DATA ] Wb 00 00 White Balance Start Wb 00 ff White Balance End

RS-232C COMMAND

[CMD ID DATA]

Cool Mid Warm Cool Mid Warm

R Gain jg Ja jd 00 172 192 192 192

G Gain jh Jb je 00 172 192 192 192

B Gain ji Jc jf 00 192 192 172 192

R Cut 64 64 64 128

G Cut 64 64 64 128

B Cut 64 64 64 128

MIN CENTER

(DEFAULT)

MAX

** Caution ** Color Temperature : COOL, Medium, Warm. One of R Gain/G Gain/ B Gain should be kept on 0xC0, and adjust other two lower than C0. (when R/G/B Gain are all C0, it is the FULL Dynamic Range of Module)

*Note : Manual W/B process using adjusts Remote control.

1) After enter Service Mode by pushing "ADJ" key,

2) Enter "White Balance" by pushing "►" key at "White Bal-

ance".

4.5.2. Adjust Check

1) Check ‘Country Group’

2) Check ‘Area Option’

3) Check ‘Tool Option’ (Refer to the BOM Comments)

4) Check ‘EDID[RGB&HDMI]’ is OK. * After check all, Press the 'EXIT' key of ADJ remote controll

to go out SVC menu.

4.6. Outgoing condition Conguration

* After all function test., press IN-STOP Key by SVC Remote

controll. And make Outgoing Condition

4.7. Ship-out mode check (In-stop)

▪ After nal inspection, if monitor is power only mode, In-stop

process is started automatically when PC is turned off by command.

Check that the unit goes to Stand-by mode.

▪ For manual in-stop, press In-Stop key of the Adj. R/C and

check that the unit goes to Stand-by mode.

▪ In-stop time

- total required time : around 10 second.(Maximum 12 second)

; time to display “In-stop OSD” : 8 second. ; time to turn on RED LED : 2 second.

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1. No Power

Replace X300

Check C500

Voltage Level (19V)

Check Power connector

OK ?

Replace Adapter

Check IC501 Output

Voltage Level (3.3V)

Replace IC501 &

Recheck

Check X300 Clock

24MHz

Replace IC405 Flash

Memory

Check IC503 Output

Voltage Level (5V)

Replace IC503 &

Recheck

Check IC502 Output

Voltage Level (1.15V)

Replace IC502 &

Recheck

TROUBLE SHOOTING

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2. No Picture

Replace Cable

Module Back Light On?

Check IC700 & Q700

Replace LED Driver IC or FET

Check Panel Power 1 2V (P401 #30 )

Check IC500 Output 12V

Replace IC500 &

Recheck

Check Panel input Clock

P401 (#9, #10 )

Check IC300

Repair Main B/D

Check FFC Cable for Damage or

Open Conductors

Check LED Driver Output

(C706)

Replace T-Con Board or Module

Check IC300

Replace Mai n SOC

Check WLED_ENABL E Hig h?

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3. No Video - Digital TV

Check RF Cable

1. Check RF IC(L200) Power (3.3V)

2. Check IC501 Output voltage(3.3V)

Replace IC501 &

Recheck

Check SCL/SDA Line(TU200 #3, #4)

Replace TU200 or

IC300(=> Main Scaler

)

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4. No Video - HDMI

Replace Main

Scaler

(IC300)

Check input signal format

Is it supported?

Check JK100 for proper

connection or Damage

Replace Connector

Check I2C Signal

(JK100)

Re Download EDID Data

Check HDMI Cable for Damage or

Open Connector

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BLOCK DIAGRAM

172mV

540mV

M1L

(128 Pin)

RS-23 2C( Phone j ack)

DEMOD

X -tal

Serial Flash

8M x 8bit

DDR 2

64Mbit

HDMI 1

TMDS/ DDC

Vide o

Fro nt

End

Audio

Fro nt

End

HDMI

LVD S out

FHD or HD

HD/SD

Vide o

Enco der

BM 28720MUV

( Digital AMP)

I2S

M CLK

Audio

DSP

UART

RX/ TX

A i r /Ca bl e

C an tuner

Side USB

USB2 .0

LVDS

Co n.

FHD

A nalog

De mod

E EP ROM

64K x 8bi t

XTAL : 24MHz

TMDS

22in ch :148.5MHz(FH D)

20/24/28i nch : 85.5M Hz(HD)

22in ch : L VDS 2ch, 1920x1080,60hz , 175MHz

20/24/28i nch : L VDS 1ch, 1366x768,60hz, 82MHz

DDR : 800MHz

MT48, 28LH 4530 : Fo r user

22/24LH 4530 : Ser vice o nl y

MT48, 28LH 4530 : Use(Serv ice on ly )

22/24LH 4530 : Not u se

MT48 : TDSS-H 701F(LG IT/Hal f NIM)

LH4530 : VA4S1UB1388(Shar p/Half NIM)

I F (ATS C)

I F (NTSC)

S D A/SCL

(24MHz)

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LV1

EXPLODED VIEW

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.

400

900

401

730

200

300

541

120

540

831

832

510

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