LG 37LK457C Schematic

Internal Use Only

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LCD TV

SERVICE MANUAL

CHASSIS : LB0EC

MODEL : 37LK457C 37LK457C-TA

CAUTION

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

Printed in KoreaP/NO : MFL67400507 (1202-REV00)

CONTENTS

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

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

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

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

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

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

BLOCK DIAGRAM .................................................................................. 22

EXPLODED VIEW .................................................................................. 23

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

Only for training and service purposes

- 2 -

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Exploded View. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.

It will also protect the receiver and it's components from being damaged by accidental shorts of th e cir cuitry 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 exp ose d metallic par t. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to

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

Leakage Current Hot Check circuit

Only for training and service purposes

- 3 -

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 specification is applied to the LB0EC 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

ea ch drawing and s pe cificatio n b y p art 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

2. Broadcasting system

3. Receiving system

4. Video Input RCA PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60

5. Component Input Y/Cb/Cr, Y/Pb/Pr

6. RGB Input (1EA) RGB-PC Analog (D-sub 15PIN)

7. HDMI Input

8. Audio Input RGB/DVI audio, Component, AV

9. SPDIF out SPDIF out

10. USB For My Media(Movie/Photo/Music List) or SVC

Austrailia, New Zealand, Singapore, Malaysia, Vietnam, Indonesia, South Africa, Israel, A-ASIA

1) PAL/SECAM-B/G/D/K

2) PAL-I/II

3) NTSC-M

4) DVB-T

Analog : Upper Heterodyne Digital : COFDM(DVB-T)

HDMI1-DTV/DVI HDMI2-DTV/DVI HDMI3-DTV

only Analog for A-ASIA

PAL for NZ/SG

▪ 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

- HD Model : HDMI version 1.3

- FHD Model : HDMI version 1.4 Support HDCP

Only for training and service purposes

- 6 -

5. Component Video Input (Y, PB, PR)

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

1 720×480 15.73 60.00 SDTV, DVD 480i

2 720×480 15.63 59.94 SDTV, DVD 480i

3 720×480 31.47 59.94 480p

4 720×480 31.50 60.00 480p

5 720×576 15.625 50.00 SDTV, DVD 625 Line

6 720×576 31.25 50.00 HDTV 576p

7 1280×720 45.00 50.00 HDTV 720p

8 1280×720 44.96 59.94 HDTV 720p

9 1280×720 45.00 60.00 HDTV 720p

10 1920×1080 31.25 50.00 HDTV 1080i

11 1920×1080 33.75 60.00 HDTV 1080i

12 1920×1080 33.72 59.94 HDTV 1080i

13 1920×1080 56.250 50 HDTV 1080p

14 1920×1080 67.5 60 HDTV 1080p

6. RGB (PC)

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

1. 720*400 31.468 70.08 28.321 For only DOS mode

2. 640*480 31.469 59.94 25.17 VESA

3. 800*600 37.879 60.31 40.00 VESA

4. 1024*768 48.363 60.00 65.00 VESA(XGA)

5. 1280*768 47.78 59.87 79.5 WXGA

6. 1360*768 47.72 59.8 84.75 WXGA

7. 1280*1024 63.981 60.02 108.875 SXGA FHD Model

8. 1920*1080 66.587 59.934 138.5 WUXGA FHD Model

Input 848*480 60Hz, 852*480 60Hz → 640*480 60Hz Display

Only for training and service purposes

- 7 -

7. HDMI Input

7.1. DTV Mode

No. Resolution H-freq(kHz) V-freq.(kHz)

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

2 720*576 31.25 50 54 SDTV 576P

3 1280*720 37.500 50 74.25 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 26.97 / 27 23.97 / 24 74.17/74.25 HDTV 1080P

8 1920*1080 33.716/ 33.75 29.976/30.00 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

7.2. PC Mode

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

1 720*400 31.468 70.08 28.321 HDCP

2 640*480 31.469 59.94 25.17 VESA HDCP

3 800*600 37.879 60.31 40.00 VESA HDCP

4 1024*768 48.363 60.00 65.00 VESA(XGA) HDCP

5 1360*768 47.72 59.8 84.75 WXGA HDCP

6 1280*1024 63.981 60.02 108.875 SXGA HDCP / FHD model

7 1920*1080 67.5 60 138.5 WUXGA HDCP / FHD model

Pixel

clock(MHz)

Proposed Remarks

Only for training and service purposes

- 8 -

ADJUSTMENT INSTRUCTION

1. Application Range

This specification sheet is applied to all of the LCD TV with LB0EC chassis.

2. Designation

(1) The adjustment is according to the order which is designated

and which must be followed, according to the plan

can be changed only on agreeing. (2) Power adjustment : Free Voltage. (3) Magnetic Field Condition: Nil. (4) Input signal Unit: Product Specification 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, Service remote control. (7) Push the "IN STOP" key - For memory initialization.

Case1 : Software version up

1. After downloading S/W by USB , TV 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” key 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.

which

(4) Click "Connect" tab. If "Can't" is displayed, check connection

between computer, jig, and set.

(2)

(3)

Please Check the Speed : To use speed between from 200KHz to 400KHz

(5) Click "Auto" tab and set as below. (6) Click "Run". (7) After downloading, check "OK" message.

(4)

filexxx.bin

(5)

(7)...........OK

(6)

3. Main PCB check process

▪ APC - After Manual-Insert, executing APC

* Boot file Download

(1) Execute ISP program "Mstar ISP Utility" and then click

"Config" tab.

(2) Set as below, and then click "Auto Detect" and check "OK"

message. If "Error" is displayed, check connection between computer, jig, and set.

(3) Click "Read" tab, and then load download file(XXXX.bin)

by clicking "Read"

(1)

filexxx.bin

* USB DOWNLOAD

(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 Low, it didn't work. But your downloaded version is High, USB data is automatically detecting.

Only for training and service purposes

- 9 -

(3) Show the message "Copying files from memory".

(4) Updating is starting.

(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 "IN-START" key in service remote control. (2) Select "Tool Option 1" and push "OK" key. (3) Punch in the number. (Each model has their number)

* [Important] AU (Australia), TS (Malaysia) Suffix have to be

applied “Tool option 3 (AU,TS)” value because of Energy Saving Standard.

3.1. ADC Process

(1) ADC

- Enter Service Mode by pushing "ADJ" key,

- Enter Internal ADC mode by pushing "►" key at "6. ADC Calibration".

WUG{GvX

XUG{GvYG

UG{GvZG

UG{Gv[G

[

UG{Gv\G

UGjGnG

UGhkjGjG ඖ

]

^UG~GiG

UGXWGwG~iG

UG{GwG

WUGlkpkGkVsG

XUGzGiVjG

YUG{GzGzG

ZUlUGpGhG

lGhkq|z{

<Caution> Using "power on" key of the Adjustment remote

control, power on TV.

* ADC Calibration Protocol (RS232)

NO Item CMD 1 CMD 2 Data 0

Enter Adjust MODE

ADC adjust ADC Adjust A D 1 0

Adjust ‘Mode In’

A A 0 0

Adjust Sequence ▪ aa 00 00 [Enter Adjust Mode] ▪ xb 00 40 [Component1 Input (480i)] ▪ ad 00 10 [Adjust 480i Comp1] ▪ xb 00 60 [RGB Input (1024*768)] ▪ ad 00 10 [Adjust 1024*768 RGB] ▪ aa 00 90 End Adjust mode * Required equipment : Adjustment remote control.

hkjGj

hkjGjG[_W un

hkjGjGXW_W un

hkjGyni un

z y

When transfer the ‘Mode In’, Carry the command.

Automatically adjustment (The use of a internal pattern)

Only for training and service purposes

3.2. Function Check

* Check display and sound

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

1) TV

2) AV

3) COMPONENT (480i)

4) RGB (PC : 1024 x 768 @ 60hz)

5) HDMI

* Display and Sound check is executed by Remote control.

- 10 -

4. Total Assembly line process

4.1. Adjustment Preparation

▪ W/B Equipment condition

CA210 : CCFL/EEFL -> CH9, Test signal: Inner pattern(80IRE) LED -> CH14, Test signal: Inner pattern(80IRE)

▪ Above 5 minutes H/run in the inner pattern. ("power on" key

of Adjustment remote control)(Only EEFL)

Cool 13,000 K

Medium 9,300 K

Warm 6,500 K

▪ Edge LED W/B Table in process of aging time (Only LGD

Edge LED Module except AUO, CMI, IPS Module)

Aging

S7LR2

time

(Min)

1 0-2 279 288 295 308 319 338 2 3-5 278 286 294 306 318 336 3 6-9 277 285 293 305 317 335 4 10-19 276 283 292 303 316 333 5 20-35 274 280 290 300 314 330 6 36-49 272 277 288 297 312 327 7 50-79 271 275 287 295 311 325 8 80-149 270 274 286 294 310 324 9 Over 150 269 273 285 293 309 323

* Connecting picture of the measuring instrument

(On Automatic control) Inside PATTERN is used when W/B is controlled. Connect to auto controller or push Adjustment R/C POWER ON -> Enter the mode of White-Balance, the pattern will come out.

Full White Pattern

RS-232C Communication

* Auto-control interface and directions

(1) Adjust in the place where the i nflux of light like floodlight

around is blocked. (illumination is less than 10 lux).

(2) Adhere closely the Color analyzer(CA210) to the module

less than 10 cm 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 'POWER ONLY' or the others, check the back light on.

X=0.269 (±0.002) Y=0.273 (±0.002)

X=0.285 (±0.002) Y=0.293 (±0.002)

X=0.313 (±0.002)

Inner pattern

(204gray,80IRE)

Y=0.329 (±0.002)

Cool Medium Warm

X y x y x y

269 273 285 293 313 329

CA-210

COLOR ANALYZER TYPE : CA-210

▪ 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]

MIN

CENTER

(DEFAULT)

MAX

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

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)

* Manual W/B process using adjust Remote control.

▪ After enter Service Mode by pushing "ADJ" key, ▪ Enter White Balance by pushing "►" key at "7. White

Balance".

EZ ADJUST

0. Tool Option1

1. Tool Option2

2. Tool Option3

3. Tool Option4

4. Tool Option5

5. Country Group

6. ADC Calibration

7. White Balance ►

8. 10 Point WB

9. Test Pattern

10. EDID D/L

11. Sub B/C

12. Touch Sensitivity Setting

13. Ext. Input Adjust

White Balance

Color Temp.

R-Gain G-Gain B-Gain R-Cut G-Cut B-Cut Test-Pattern Backlight Reset

Cool

172 172 192

64 64 64

100

To Set

* After you finished all adjustments, Press "In-start" key and

compare Tool option and Area option value with its BOM, if it is correctly same then unplug the AC cable. If it is not same, then correct it same with BOM and unplug AC cable. For correct it to the model's module from factory Jig model.

* Push the "IN STOP" key after completing the function

inspection.

4.2. DDC EDID Write (RGB 128Byte )

▪ Connect D-sub Signal Cable to D-Sub Jack. ▪ Write EDID DATA to EEPROM (24C02) by using DDC2B

protocol. ▪ Check whether written EDID data is correct or not. * For SVC main Ass’y, EDID have to be downloaded to

Insert Process in advance.

Only for training and service purposes

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4.3. DDC EDID Write (HDMI 256Byte)

▪ Connect HDMI Signal Cable to HDMI Jack. ▪ Write EDID DATA to EEPROM(24C02) by using DDC2B

protocol. ▪ Check whether written EDID data is correct or not. * For SVC main Ass’y, EDID have to be downloaded to Insert

Process in advance.

4.4. EDID DATA

(1) All Data : HEXA Value (2) Changeable Data :

*: Serial No : Controlled / Data:01 **: Month : Controlled / Data:00 ***: Year : Controlled ****: Check sum

4.4.1. Auto Download

▪ After enter Service Mode by pushing "ADJ" key. ▪ Enter EDID D/L menu. ▪ Enter "START" by pushing "OK" key. <Caution> Never connect HDMI && D-sub cable when EDID

downloaded.

EZ ADJUT

0. Tool Option1

1. Tool Option2

2. Tool Option3

3. Tool Option4

4. Tool Option5

5. Country Group

6. ADC Calibration

7. White Balance

8. 10 Point WB

9. Test Pattern

10. EDID D/L ►

11. Sub B/C

12. Touch Sensitivity setting

13. Ext. Input Adjust

HDMI1 HDMI2 HDMI3 RGB

EDID D/L

Start

EDID D/L

Start

NG NG NG NG

Reset

OK OK OK OK

Reset

4.4.2. Manual Download

1) Use the proper signal cable for EDID Download

- Analog EDID : Pin3 exists

- Digital EDID : Pin3 exists

2) Never connect HDMI & D-sub Cable at the same time.

3) Use the proper cables below for EDID Writing.

4) Download HDMI1, HDMI2 separately because HDMI1 is different from HDMI2.

For Analog For HDMI EDID

D-sub to D-sub DVI-D to HDMI or HDMI to HDMI

No. Item Condition Hex Data

1 Manufacturer ID GSM 1E6D

2 Version Digital : 1 01

3 Revision Digital : 3 03

(1) FHD RGB EDID data

0 1 2 3 4 5 6 7 8 9 A B C D E F

0 0 ff ff f f f f f f f f 0 1e 6d a b 10 c 1 3 68 10 9 78 0a ee 91 a3 54 4c 99 26 20 0f 50 54 a1 8 0 81 80 61 40 45 4 0 31 40 1 1 30 1 1 1 1 1 1 2 3a 80 18 71 38 2d 40 58 2c 40 45 0 a0 5a 0 0 0 1e 1 1d 0 72 51 d0 1e 20 50 6e 28 55 0 a0 5a 0 0 0 1e 0 0 0 fd 0 3a 60 3e 1e 53 10 0 0a 20 20 20 20 20 20 d 70 d 0 e

* EDID data and Model option download (RS232)

NO Item CMD 1 CMD 2 Data 0

Enter download MODE

EDID data and Model option download

Download ‘Mode In’

Download A E 00 10

A A 0 0

Only for training and service purposes

When transfer the ‘Mode In’, Carry the command.

Automatically download (The use of a internal data)

(2) FHD HDMI EDID data

0 1 2 3 4 5 6 7 8 9 A B C D E F

0 0 ff ff ff ff ff ff 0 1e 6d a b 10 c 1 3 80 10 9 78 0a ee 91 a3 54 4c 99 26 20 0f 50 54 a1 8 0 71 4f 81 80 1 1 1 1 1 1 30 1 1 1 1 1 1 2 3a 80 18 71 38 2d 40 58 2c 40 45 0 a0 5a 0 0 0 1e 1b 21 50 a0 51 0 1e 30 50 48 88 35 0 a0 5a 0 0 0 1c 0 0 0 fd 0 3a 60 3e 1e 53 10 0 0a 20 20 20 20 20 20 d 70 d 1 e 80 2 3 26 f1 4e 10 1f 84 13 5 14 3 2 12 20 21 90 22 15 1 26 15 7 50 9 57 7 f A0 f e3 5 3 1 1 1d 80 18 71 1c 16 20 58 2c B0 25 0 a0 5a 0 0 0 9e 1 1d 0 72 51 d0 1e 20

C0 6e 28 55 0 a0 5a 0 0 0 1e 2 3a 80 18 71 38 D0 2d 40 58 2c 45 0 a0 5a 0 0 0 1e 1 1d 0 bc E0 52 d0 1e 20 b8 28 55 40 a0 5a 0 0 0 1e 0 0 F0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 e

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(3) Detail EDID Options are below

a. Product ID

MODEL NAME HEX EDID Table DDC Function

HD/FHD Model 0001 01 00 Analog/Digital

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

ex) Week : '01' -> '01'

Year : '2012' -> '16' fix

d. Model Name(Hex):

cf) TV set’s model name in EDID data is below.

MODEL NAME MODEL NAME(HEX)

LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)

e. Checksum: Changeable by total EDID data.

EDID C/S data

HDMI RGB

Block 0 E2 1C

check sum (Hex)

Block 1

99 (HDMI1)

-89 (HDMI2)

79 (HDMI3)

f. Vendor Specific(HDMI)

Input Model name(HEX)

HDMI1 67030C001000B82D

HDMI2 67030C002000B82D

HDMI3 67030C003000B82D

4.5.2. Comand Set

* Description

FOS Default write : <7mode data> write Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0, Phase Data write : Model Name and Serial Number write in EEPROM,.

Adjust mode CMD(hex) LENGTH(hex) Description

EEPROM WRITE A0h 84h+n n-bytes Write (n = 1~16)

4.5.3. Method & notice

(1) Serial number D/L is using of scan equipment. (2) Sett ing of sca n eq uipment o perated b y Ma nufac turing

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.

* 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.

1) Press the "Instart" key of Adjustment remote control.

2) Go to the menu "6.Model Number D/L" like below photo.

3) Input the Factory model name or Serial number like photo.

4.5. Model name & Serial number D/L

▪ Press "Power on" key of service remote control.

(Baud rate : 115200 bps) ▪ Connect RS232 Signal Cable to RS-232 Jack. ▪ Write Serial number by use RS-232. ▪ Must check the serial number at the Product/Service info..

(menu key -> red key -> select product/Service info)

4.5.1. Signal Table

CMD LENGTH ADH ADL DATA_1 . . . Data_n CS DELAY

CMD : A0h LENGTH : 85~94h (1~16 bytes) ADH : EEPROM Sub Address high (00~1F) ADL : EEPROM Sub Address low (00~FF) Data : Write data CS : CMD + LENGTH + ADH + ADL + Data_1 +...+ Data_n Delay : 20ms

4) Check the model name Instart menu. → Factory name displayed.

5) Check the Product/Service info..(Menu key → Red key → Select product/Service info) → Buyer model displayed.

4.5.4. Outgoing condition Configuration

■ When pressing IN-STOP key by SVC remocon, Red LED are blinked alternatively. And then automatically turn off.

(Must not AC power OFF during blinking)

4.6. Hi-Pot Test

Confirm whether is normal or not when between power board's ac block and GND is impacted on 1.5 kV(dc) or 2.2 kV(dc) for one second.

Only for training and service purposes

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