LG 49MS75A Schematic

Internal Use Only

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MONITOR SIGNAGE

SERVICE MANUAL

CHASSIS :

MODEL :

CAUTION

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

LW43B

49MS75A

49MS75A-5BB

MFL67237405 (1412-REV00)

Printed in KoreaP/NO :

CONTENTS

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

PRECAUTION

SERVICING PRECAUTIONS

SPECIFICATION

ADJUSTMENT INSTRUCTION

BLOCK DIAGRAM

EXPLODED VIEW

........................................................................................... 3

.................................................................... 4

....................................................................................... 6

................................................................ 8

.................................................................................. 15

.................................................................................. 16

SCHEMATIC CIRCUIT DIAGRAM

TROUBLE SHOOTING GUIDE

................................................ APPENDIX

........................................... APPENDIX

Only for training and service purposes

- 2 -

PRECAUTION

To Instrument's exposed METALLIC PARTS

AC Volt-meter

*Base on Adjustment standard

WARNING FOR THE SAFETY-RELATED COMPONENT.

• There are some special components used in LCD monitor that are important for safety. These parts are

marked on the schematic diagram and the Exploded View. It is essential that these critical parts

should be replaced with the manufacturer' s specified parts to prevent electric shock, fire or other hazard.

• Do not modify original design without obtaining written permission from manufacturer or you will void the original parts and labor guarantee.

TAKE CARE DURING HANDLING THE LCD MODULE WITH BACKLIGHT UNIT.

• Must mount the module using mounting holes arranged in four corners.

• Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

• Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel.

• Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

WARNING

BE CAREFUL ELECTRIC SHOCK !

• If you want to replace with the new backlight or inverter circuit, must disconnect the AC adapter because high voltage appears at inverter circuit about 650Vrms.

• Handle with care wires or connectors of the inverter circuit. If the wires are pressed cause short and may burn or take fire.

Leakage Current Hot Check Circuit

Good Earth Ground such as WATER PIPE,

0.15µF

1.5 Kohm/10W

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

CONDUIT etc.

• Make certain that treatment person' s body are grounded

• Do not leave the module in high temperature and in

• The module not be exposed to the direct sunlight.

• Avoid contact with water as it may a short circuit within

• If the surface of panel become dirty, please wipe it off

through wrist band.

areas of high humidity for a long time.

the module.

with a softmaterial. (Cleaning with a dirty or rough cloth may damage the panel.)

CAUTION

Please use only a plastic screwdriver to protect yourself from shock hazard during service operation.

• Replaceable batteries

CAUTION

RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS. REPLACE ONLY WITH THE SAME OR EQUIVALENT TYPE.

ADVARSEL Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til leverandøren.

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 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.

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 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.

Only for training and service purposes

- 5 -

SPECIFICATION

1. Application range

This specication is applied to the LW43B 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) 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 Monitor test method followed.

2) Demanded other specication

- Safety : CE, IEC specication

- EMC : CE, IEC

4. General Specication

4.1. General Specication

No. Item Content Remark

1 HDMI Input (2EA) HDMI Rear / support D-TV&PC

resolution

2 DVI Input (1EA) DVI

3 DP Input(1EA)/Output(1EA) DP Rear / support D-TV&PC

resolution

4 Audio Input (1EA) DVI Audio L/R Input

5 OPS Input(1EA) OPS(Open Pluggable Specication: Built-in PC) Optional Docking Port(OPS Kit

Accessory)

6 Speaker Output (1EA) Compatible with common speaker 10W*2Ch Output

7 IR&Brightness Sensor Input

(1EA)

8 Pixel Sensor Input (1EA) Pixel Sensor Optional

IR&Brightness Sensor

9 External USB (1EA) Picture, Music, Movie, SVC Device : Memory Stick, Mouse,

Keyboard, Wi-Fi USB Dongle

10 RS-232C Input(1EA)/Out-

put (1EA)

11 LAN(1EA) RJ45, 100BASE-T Network Connection for

12 Local Key 8 keys

Display Control

SuperSign-W/SuperSign-C

4.2. DVI-D, HDMI, Display Port (PC) Specication

No. Item Specication Remarks 1 Supported Sync. Type Digital

2 Operating Frequency Digital

3 Resolution Digital

Only for training and service purposes

Horizontal 30 - 83 kHz Vertical 60 Hz Only Max 1920 × 1080 @ 60 Hz Recommend 1920 × 1080 @ 60 Hz

- 6 -

5. Signal Timing (Supporting Resolution)

5.1. DVI, HDMI, Display Port (PC Mode )

No. Section Pol. Dot Clock

[MHz]

1 H(Pixels) - 25.175 31.469 800 640 16 96 48 640 x 480

V(Lines) - 59.94 525 480 10 2 33

2 H(Pixels) + 40.0 37.879 1056 800 40 128 88 800 x 600

V(Lines) + 60.317 628 600 1 4 23

3 H(Pixels) - 65.0 48.363 1344 1024 24 136 160 1024 x 768

V(Lines) - 60.0 806 768 3 6 29

4 H(Pixels) + 74.5 44.772 1664 1280 64 128 192 1280 x 720

V(Lines) + 59.855 748 720 3 5 20

5 H(Pixels) - 85.86 47.7 1800 1366 72 144 216 1366 x 768

V(Lines) - 60 795 768 1 3 23

6 H(Pixels) + 108.0 63.981 1688 1280 48 11 2 248 1280 x 1024

V(Lines) + 60.02 1066 1024 1 3 38

7 H(Pixels) - 146.25 65.290 2240 1680 104 176 280 1680 x 1050

V(Lines) + 59.954 1089 1050 3 6 30

8 H(Pixels) + 148.5 67.5 2200 1920 88 44 88 1920 x 1080

V(Lines) + 60 1125 1080 4 5 46

Frequency

[kHz]/[Hz]

Total

Cycle

(E)

Display

(A)

Front

Porch(B)

Sync.

(D)

Back

Porch(F)

Resolution

5.2. HDMI, DisplayPort (DTV Mode ) * DVI Input dont support DTV Mode

No.

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

1 480/60P 31.5 60 EDTV 480p

2 576/50P 31.25 50 EDTV 576p

3 720/50P 37.5 50 HDTV 720p

4 720/60P 45 60 HDTV 720p

5 1080/50i 28.1 50 HDTV 1080i 50Hz For Australian

6 1080/60i 33.75 60 HDTV 1080i 60Hz

7 1080/50P 56.25 50 HDTV 1080P 50Hz

8 1080/60P 67.5 60 HDTV 1080P 60Hz

Specication Remark

Only for training and service purposes

- 7 -

ADJUSTMENT INSTRUCTION

1. Application Range

This spec sheet is applied all of the Digital Signage Product with LW43B chassis.

2. Specication

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 °C ± 5 °C of temperature and 65 % ± 10 % of relative

humidity if there is no specic designation.

4) The input voltage of the receiver must keep AC 100-240 V~, 50/60 Hz.

5) At rst 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

15.

In case of keeping module is in the circumstance of 0 °C, it should be placed in the circumstance of above 15 °C for 2 hours.

In case of keeping module is in the circumstance of below -20 °C, it should be placed in the circumstance of above 15 °C for 3 hours.

4. MAIN PCBA Adjustments

4.1. ADC Calibration [MS75A Model Digital Only Model: does not apply]

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

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

4.2. MAC Address

4.2.1. Equipment & Condition

1) Play le: keydownload.exe

4.2.2. Communication Port connection

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

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

4.2.3. Download process

1) Select the download items.

2) Mode check: Online Only

3) Check the test process : DETECT → MAC_WRITE

4) Play: START

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

4.2.4. Communication Port connection

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

Port

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 MAC Address Download

1) ADC adjustment: Digital Only [does not apply]

2) EDID / DDC Download.

3) MAC Address Download * Remark

- Above adjustment items can be also performed in Final Assembly if needed. Adjustment items in both

PCBA and nal assembly stages can be checked by using the INSTART Menu → ADJUST CHECK.

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) Ship-out mode

2) Service Option Default

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

service only)

4) ISP Download (Optional)

4.2.5. Download

Only for training and service purposes

- 8 -

4.3. LAN Inspection

4.3.1. Equipment & Condition

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

4.5 Serial number download

Connect Bar Code scan equipment and set by RS-232C cable.

1) E2PROM Data Write

4.3.2. LAN inspection solution

1) LAN Port connection with PCB

2) Network setting at MENU Mode of SET (Installer Menu →

119 → 253 → Menu)

3) Setting automatic IP

4) Setting state conrmation

→ If automatic setting is nished, you conrm IP and MAC

Address.

4.4. LAN PORT INSPECTION(PING TEST)

4.4.1. Equipment setting

1) Play the LAN Port Test PROGRAM.

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

*IP Number : 12.12.2.2

4.4.2. LAN PORT inspection(PING TEST)

1) Play the LAN Port Test Program.

2) Connect each other LAN Port Jack.

3) Play Test (F9) button and conrm OK Message.

4) Remove LAN cable.

2) E2PROM Data Read

4.6 EDID/DDC Download (EDID PCM)

4.6.1 Overview

It is a VESA regulation. A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input. It is a realization of “Plug and Play”.

4.6.2 Equipment

1) Since EDID data is embedded, EDID download JIG, HDMI cable and D-sub are not need.

2) Adjust by using remote controller.

4.6.3 Download method

1) Press Adj. key on the Adj. R/C,

2) Select EDID D/L (PCM) 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 / D-

sub Cable.

Only for training and service purposes

4.6.4. EDID DATA

1) DVI (Check Sum : 0x3C)

- 9 -

2) HDMI 1 (Check Sum : 0x3E, 0xA2)

Color Analyzer

Computer

Pattern Generator

※

※If Signage internal pattern is us ed, not needed

Signal Source

Probe

RS-232C

3) HDMI 2 (Check Sum : 0x3E, 0x92)

5. Final Assembly Adjustment

5.1. White Balance Adjustment

5.1.1. Overview

5.1.1.1. W/B adj. Objective & How-it-works

1) Objective: To reduce each Panel's W/B deviation

2) How-it-works : When R/G/B gain in the OSD is at 192, it means the panel is at its Full Dynamic Range. In order to prevent saturation of Full Dynamic range and data, one of

R/G/B is xed at 192, and the other two is lowered to nd

the desired value.

3) Adjustment condition : normal temperature

- Surrounding Temperature : 25 °C ± 5 °C

- Warm-up time: About 5 Min

- Surrounding Humidity : 20 % ~ 80 %

- Before White balance adjustment, Keep power on

status, don’t power off

5.1.1.2. Adj. condition and cautionary items

1) Lighting condition in surrounding area surrounding lighting should be lower 10 lux. Try to isolate adj. area into dark surrounding.

2) Probe location: Color Analyzer (CA-210) probe should be within 10cm and perpendicular of the module surface (80°~ 100°)

3) Aging time

- After Aging Start, Keep the Power ON status during 5

Minutes.

- In case of LCD, Back-light on should be checked us-

ing no signal or Full-white pattern.

4) DP (Check Sum : 0x3C, 0xA2)

5) OPS (Check Sum : 0x3E, 0x82)

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/204Gray(Model:217, Pattern:49)

* Only when internal pattern is not available * Color Analyzer Matrix should be calibrated using CS-1000.

5.1.3. Equipment connection MAP

Only for training and service purposes

- 10 -

5.1.4. Adj. Command (Protocol)

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

RS-232C COMMAND

[CMD ID DATA]

wb 00 00 Begin White Balance adjustment

wb 00 ff

End White Balance adjustment (internal pattern disappears )

Explantion

Ex) wb 00 00 -> Begin white balance auto-adj. wb 00 10 -> Gain adj. ja 00 ff -> Adj. data jb 00 c0 ... ...

wb 00 1f → Gain adj. completed *(wb 00 20(Start), wb 00 2f(end)) → Off-set adj. wb 00 ff → End white balance auto-adj.

▪ Adj. Map

Cool

Medium

Warm

Adj. item

R Gain j G 00 C0

G Gain j H 00 C0

B Gain j I 00 C0

R Cut

G Cut

B Cut

R Gain j A 00 C0

G Gain j B 00 C0

B Gain j C 00 C0

R Cut

G Cut

B Cut

R Gain j D 00 C0

G Gain j E 00 C0

B Gain j F 00 C0

R Cut

G Cut

B Cut

Command

(lower caseASCII)

CMD1 CMD2 MIN MAX

Data Range

(Hex.)

Default

(Decimal)

5.1.5. Adj. method

5.1.5.1 Auto WB calibration

1) Set 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 nish as end command “wb 00 ff”, and Adj. offset

if need

5.1.5.2 Manual adjustment Method.

1) Set 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 → White-

Balance then press the cursor to the right (KEY►). When KEY (►) is pressed 204 Gray (80IRE) internal patterns will

be displayed.

4) Adjust Cool modes

- Fix the one of R/G/B gain to 192 (default data) and decrease the others. ( If G gain is adjusted over 172 and R and B gain less than 192 , Adjust is O.K.)

- If G gain is less than 172, Increase G gain by up to 172, and then increase R gain and G gain same amount of increasing G gain.

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

5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of

color temperature.

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

Remote controller.

▪ If internal pattern is not available, use RF input. In

EZ Adj. menu 6.White Balance, you can select one of 2 Test-pattern : ON, OFF. Default is inner (ON). By selecting OFF, you can adjust using RF signal in 206 Gray pattern.

5.1.5.3 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: 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.

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

▪ Luminance : 204 Gray (80IRE) ▪ Standard color coordinate and temperature using CA-210 (CH14)

: [applied only LGD Module]

Mode

Cool 0.271±0.002 0.270±0.002 13,000K -0.003

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

▪ Standard color coordinate and temperature using CA-210(CH

14) – by aging time

1) Egde LED models (applied only LGD Module) in LGEKR (GUMI) And LGERS

Net

Aging time

Cast

(Min)

3.0

1 0-2 276 278 291 297 318 337 2 3-5 275 276 290 295 317 335 3 6-9 274 275 289 294 316 334 4 10-19 273 274 288 293 315 333 5 20-35 272 273 287 292 314 332 6 36-49 272 272 287 291 314 331 7 50-79 271 271 286 290 313 330 8 80-119 271 270 286 289 313 329 9 Over 120 271 270 286 289 313 329

Coordinate

x y

Cool Medium Warm

X y x y x y

271 270 286 289 313 329

Temp ∆uv

Only for training and service purposes

- 11 -

2) Egde Direct LED models (applied only LGD Module) in LGEKR (GUMI for Winter Season)

Net

Aging time

Cast

(Min)

3.0

1 0-2 280 282 295 301 322 341 2 3-5 279 281 294 300 321 340 3 6-9 278 280 293 299 320 339 4 10-19 277 279 292 298 319 338 5 20-35 276 277 291 296 318 336 6 36-49 274 275 289 294 316 334 7 50-79 273 273 288 292 315 332 8 80-119 272 271 287 290 314 320 9 Over 120 271 270 286 289 313 329

Cool Medium Warm

X y x y x y

271 270 286 289 313 329

▪ Standard color coordinate and temperature using CA-

210(CH-14) – by aging time

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

▪ After nal inspection, press In-Stop key of the Adj. R/C and

check that the unit goes to Stand-by mode

6. Audio

6.1. Audio input condition

1) Only DVI PC Input

5) HI-POT test (Auto)

- If Test is failed, Buzzer operates.

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

7.3. 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

8. EYE Q Green Inspection

8.1 Method

1) Connect the Power and IR+Brightness Sensor cable to the

set.

2) Turn on the Signage SET.

3) Press “P-Only→ Exit → EYE” Button on the adjustment of

R/C.

6.2. Specication

No. Item Min Typ Max Unit Remark

Audio practical max Output, L/R

1.

(Distortion=10%

max Output)

Speaker (8Ω

2. Impedance)

9.0 10.0 12.0 W

8.5 8.9 9.8 Vrms

10.0 14.0 W

Measurement condition EQ Off AVL Off Clear Voice Off

7. GND and HI-POT Test

7.1. GND & HI-POT auto-check preparation

1) Check the POWER CABLE and SIGNAL CABE insertion condition

7.2. 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)

4) Green Eye-Check Box on the screen after 3 seconds.

5) Cover the IR+Brightness Cable Assy with your hands, hold it for 3 second

6) If normal operation is indicated the "OK " on the screen

7) If the "NG ", replace the IR+Brightness Cable Assy or Sensor.

8) Please test again after changing the cable.

9) Please Press the In-Stop Button after completing the test.

[Note] Check the sensor data on the screen, make certain that

data is below 20. If data isn’t below 20 in 3 seconds, EYE Q sensor would be bad. You should change EYE Q sensor.

8.2 Pixel Sensor Inspection Manual

* Pixel Sensor Kit Parts

- SET / Power Cord / IR+Brightness Cable Assy / Remote

Control

Only for training and service purposes

- 12 -

* Method

Power Cord Connection

IR+Brigntness Cable Connection

Pixel Sensor Cable

Connection

1

2

3

a

b

c

1) Connect the cable Assy[Power Cord] on the set.

2) Connect the cable Assy[IR+Brightness Cable] on the set.

5) As follows: the remote control operation.

a. Press " P-ONLY " on the adjustment of R/C.

b. Press " EXIT " on the adjustment of R/C.

3) Connect the cable Assy[Pixel Sensor Cable] on the set.

c. Press “EYE Button” on the adjustment of R/C

- Please Check the R,G,B pattern on the Screen.

4) Turn on the Signage SET.

- Check the sensor data on the screen

- Please check RGB Sensor-Check On the screen.

OK : Pass . NG : Fail [Re-Run]

Only for training and service purposes

- 13 -

9. USB S/W Download(Service only)

1) Put the USB Stick to the USB socket

2) Automatically detecting update le in USB Stick

- If your downloaded program version in USB Stick is lower than that of Signage set, it didn’t work. Otherwise USB data is automatically detected.

3) Updating is staring.

4) Updating Completed, The Signage will restart automatically

5) If your Signage is turned on, check your updated version

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

* If downloading version is more high than your Signage

have, Signage 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)

7) Press OK in Comp 1080p menu

8) If ADC Comp is successful, “ADC Component Success” is displayed.

9) If ADC calibration is failure, “ADC Component Fail” is displayed.

10) If ADC calibration is failure, after rechecking ADC pattern

or condition, retry calibration

10.2. Manual White balance Adjustment

10.2.1. 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 us-

ing no signal or Full-white pattern.

10.2.2. 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)

10. Optional adjustments

10.1. Manual ADC Calibration

10.1.1. Equipment & Condition

1) Adjustment Remocon

2) 801GF (802B, 802F, 802R) or MSPG925FA Pattern Generator

- Resolution: 480i Comp1 (MSPG-925FA: model-209,

pattern-65)

- Resolution: 1080p Comp1 (MSPG-925FA: model-225,

pattern-65)

- Resolution : 1080p RGB (MSPG-925FA: model-225,

pattern-65)

- Pattern: Horizontal 100% Color Bar Pattern

- Pattern level: 0.7±0.1 Vp-p

10.1.2 Adjust method

10.1.2.1 ADC 480i/1080p Comp

[MS75A Model Digital Only Model: does not apply]

1) Check connected condition of Comp cable to the equipment

2) Give a 480i Mode, Horizontal 100% Color Bar Pattern to

Comp1. (MSPG-925FA → Model: 209, Pattern: 65)

3) Change input mode as Component1 and picture mode as “Standard”

4) Press the In-start Key on the ADJ remote after at least 1 min of signal reception. Then, select 7.External ADC. And Press OK or Right Button for going to sub menu.

5) Press OK in Comp 480i menu

6) Give a 1080p Mode, Horizontal 100% Color Bar Pattern to

Comp1. (MSPG-925FA → Model: 225, Pattern: 65)

10.2.3. Adjustment [MS75A Model Digital Only Model: does not apply]

1) Set 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 → WhiteBalance then press the cursor to the right (KEY►). When KEY(►) is pressed 216 Gray internal pattern will be

displayed.

4) One of R Gain / G Gain / B Gain should be xed at 192,

and the rest will be lowered to meet the desired value.

5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of color temperature.

▪ If internal pattern is not available, use RF input. In EZ Adj.

menu 6.White Balance, you can select one of 2 Test-pattern: ON, OFF. Default is inner(ON). By selecting OFF, you can adjust using RF signal in 216 Gray pattern.

Only for training and service purposes

- 14 -

BLOCK DIAGRAM

Only for training and service purposes

- 15 -

LV1

400

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.

401

510

A2

200

315

300

541

540

530

Only for training and service purposes

- 16 -

M14(Signage) Training Manual

LGE Internal Use Only

1. Power Block Diagram LPB

LGE Internal Use Only

2-1. Block Diagram

LGE Internal Use Only

2-2. I2C Map

LGE Internal Use Only

2-3. Main Power Block

LGE Internal Use Only

3. Model Cable Dressing Tapes

No

Part No

Description

Qty

Specification

①

RAB33632804

TAPE,POLYESTER

5 EA

POLYESTER 100% FR(FIRE RESISTANCE)/// GRAY 200UM 20mM 80mM

SERVEONE CO., LTD.

②

RAB33632803

TAPE,POLYESTER

1 EA

POLYESTER 100% FR(FIRE RESISTANCE)// GRAY 200UM 30mM 120mM

SERVEONE CO., LTD.

•Wearing the Wrist strap while the working.

•* Using the clean gloves.(None pollution)

•Scrub the tape about 2~3 timesfor protecting

come off the tape.

•* Be careful the taping position.

49MS75A

1

2

LGE Internal Use Only

M14 Repair Process

LGE Internal Use Only

Contents of Monitor Signage Standard Repair Process

No. Error symptom (High category) Error symptom (Mid category) Page Remarks

1

A. Video error

No video/Normal audio 2

2 No video/No audio 3 3 Color error 4

4

Vertical/Horizontal bar, residual image, light spot, external device color error

5

B. Power error

No power 6

6 Off when on, off while viewing, power auto on/off 7

7

C. Audio error

No audio/Normal video 8

8 Wrecked audio/discontinuation/noise 9 9

D. Function error

Remote control & Local switch checking

10 10 External device recognition error 11 11 E. Noise Circuit noise, mechanical noise 12 12 F. Exterior error Exterior defect 13

First of all, Check whether there is SVC Bulletin in GCSC System for these model.

7

LGE Internal Use Only

Normal

audio

Y

N

Move to No

video/No audio

No video

Normal audio

Check Back Light

On with naked eye

On

Y

N

Check Power Board

12v,3.5v etc.

Normal

voltage

Y

N

Replace T-con Board

or module

And Adjust VCOM

Repair Power Board

or parts

Check Power Board 24v output

Normal voltage

Y

Replace Inverter

or module

N

Repair Power

Board or parts

End

Always check & record S/W Version and White

Balance value before replacing the Main Board

Replace Main Board

Re-enter White Balance value

※Precaution

Established date

Standard Repair Process

Revised date

1/13

Signage Monitor

Error symptom

A. Video error

No video/ Normal audio

☞A4 ☞A1

☞A2

☞A7 & A3

First of all, Check whether all of cables between board is inserted properly or not.

(Main B/D↔ Power B/D, Power Cable, FFC LVDS Cable, Key Cable,,,)

8

LGE Internal Use Only

Normal

voltage?

Check various voltages

of Power Board

( 3.5V,12V,or 24V…)

No Video/

No audio

Check and

replace

MAIN B/D

Y

Replace Power

Board and repair

parts

N

End

Standard Repair Process

A. Video error

No video/ No audio

☞A4

Established

date

Revised date

2/13

Error

symptom

9

Signage Monitor

LGE Internal Use Only

Color

error?

Y

N

※ Check and

replace Link

Cable

(LVDS) and

contact

condition

Y

N

Replace Main B/D

Color

error?

Check error color

input mode

Check color by input

-External Input

-HDMI

-Display Port

-DVI

Y

External device

/Cable

normal

External Input/

HDMI

error

Check

external

device and

cable

Y

External device

/Cable

normal

DP/DVI

error

Check external

device and

cable

Replace Main B/D

N

A. Video error

Color error

☞A8

N

Y

End

Replace module

Request repair

for external

device/cable

Color

error?

Check Test pattern

☞A12

☞ A10

Standard Repair Process

Established

date

Revised date

4/13

Error

symptom

10

Signage Monitor

LGE Internal Use Only

Screen

normal?

N

Y

Check external

device

connection

condition

Y

N

Check and

replace Link

Cable

Normal?

Y

N

Screen

normal?

Replace

module

Check color condition by input

-External Input

-HDMI / DP / DVI

End

Vertical/Horizontal bar, residual image, light spot

Request repair

for external

device

A. Video error

Vertical / Horizontal bar, residual image,

light spot, external device color error

☞A12

External device screen error-Color error

External

Input error

Connect other

external device

and cable

(Check normal operation of

External Input, Component,

and HDMI/DVI/DP by

connecting Jig, pattern

Generator ,Set-top Box etc.

N

Y

Replace

Main B/D

Screen

normal?

Check screen condition by input

-External Input

-HDMI / DP/ DVI

Request repair for external device

RGB

error

HDMI

DP

DVI error

Connect other external

device and cable

(Check normal operation of

External Input, Component,

and HDMI/DVI/DP by

connecting Jig, pattern

Generator ,Set-top Box etc.

Replace

Main B/D

Screen

normal?

N

Y

Check S/W Version

Y

N

Check

version

S/W Upgrade

Y

N

Normal

screen?

End

Y

N

Replace Main B/D

Replace

Module

Screen

normal?

End

Established

date

Revised date

5/13

Error symptom

Standard Repair Process

☞A8

☞ A10

Check Test pattern

11

Signage Monitor

LGE Internal Use Only

B. Power error

No power

Power LED

On?

Y

N

DC Power on

by pressing Power Key

On Remote control

Y

N

Normal

operation?

Check Power

On ‘”High”

Check Power cord

was inserted properly

Check

Power LED

Replace

Power

B/D

Measure voltage of each output of Power B/D

N

Y

Normal

voltage?

Replace Main B/D

Y

OK?

Replace Main B/D

N

Y

Normal?

Check ST-BY 3.5V

Replace Power B/D

N

Y

Normal

voltage?

Replace Power

B/D

Y

☞A18

☞A19

☞A4

Standard Repair Process

Established

date

Revised date

6/13

Error

symptom

Close

12

Signage Monitor

LGE Internal Use Only

B. Power error

Off when on, off while viewing, power auto on/off

Error?

N

Y

Check Power Off

Mode

Check A/C cord

Replace Main B/D

CPU

Abnormal

(If Power Off mode is

not displayed)

Check Power B/D

voltage

Y

N

Replace Main B/D

Normal

voltage?

Replace Power B/D

N

Y

Normal?

End

※ Caution

Check and fix exterior

of Power B/D Part

☞A22

☞A19

Established

date

Revised date

7/13

Error

symptom

Standard Repair Process

Status Power off List Explanation

Normal

"POWEROFF_REMOTEKEY" Power off by REMOTE CONTROL "POWEROFF_OFFTIMER" Power off by OFF TIMER "POWEROFF_SLEEPTIMER" Power off by SLEEP TIMER "POWEROFF_INSTOP" Power off by INSTOP KEY "POWEROFF_AUTOOFF" Power off by AUTO OFF

"POWEROFF_ONTIMER" Power off by ON TIMER

"POWEROFF_RS232C" Power off by RS232C "POWEROFF_RESREC" Power off by Reservated Record "POWEROFF_RECEND" Power off by End of Recording "POWEROFF_SWDOWN" Power off by S/W Download "POWEROFF_UNKNOWN" Power off by unknown status except listed case

Abnormal

"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal

* Please refer to the all cases which

can be displayed on power off mode.

Abnormal

1

13

Signage Monitor

Check for all 3- phase power out

Check outlet

Fix A/C cord and

Outlet and check each 3 phase out

LGE Internal Use Only

No audio

Screen normal

Check user

menu >

Speaker Out

Off

N

Y

Cancel OFF

Check audio B+ 24V

of Power Board

Normal voltage

Y

N

Replace Power Board and repair parts

Check Speaker

disconnection

N

Y

Replace Speaker

Replace MAIN Board

End

C. Audio error

No audio/ Normal video

☞A24 ☞A25

Disconnection

Established

date

Revised date

8/13

Error

symptom

Standard Repair Process

14

Signage Monitor

LGE Internal Use Only

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

C. Audio error

Wrecked audio/ discontinuation/noise

Wrecked audio/

Discontinuation/

Noise for

all audio

Check and replace

speaker and

connector

Wrecked audio/

Discontinuation/

Noise only

for D-TV

Wrecked audio/

Discontinuation/

Noise only

for Analog

Wrecked audio/

Discontinuation/

Noise only

for External Input

Connect and check

other external device

N

Y

Normal

audio?

Check and fix external device

Replace Power B/D

N

Y

Normal

voltage?

Check input

signal

-RF

-External Input

signal

Signal

normal?

(When RF signal is not

received)

Request repair to external

cable/ANT provider

Y

Check audio

B+ Voltage (24V)

Replace Main B/D

(In case of External

Input signal error)

Check and fix

external device

Replace Main B/D

N

End

Established

date

Revised date

9/13

Error

symptom

Standard Repair Process

☞A25

15

Signage Monitor

LGE Internal Use Only

D. General Function Problem

Remote control & Local switch checking

Y

N

Check R/C itself

Operation

Normal

operating?

Normal

operating?

Y

Close

Replace R/C

If R/C operate, Explain the customer cause is interference

from light in room.

Check R/C Operating

When turn off light

in room

Check & Replace

Baterry of R/C

Check & Repair

Cable connection

Connector solder

Normal

operating?

Check B+ 3.5V

On Main B/D

☞A27

Normal

Voltage?

Close

N

Check 3.5v on Power B/D

Replace Power B/D or

Replace Main B/D

(Power B/D don’t have problem)

☞A4

Check IR

Output signal

Normal

Signal?

N

Y

Repair/Replace

IR B/D

N

☞A27

Replace

Main B/D

Y

☞A27

Standard Repair Process

Established

date

Revised date

10/13

Error

symptom

16

Y

1. Remote control(R/C) operating error

Signage Monitor

LGE Internal Use Only

Check technical

information

- Fix information

- S/W Version

N

Y

Technical

information?

Check

input

signal

Signal

input?

Y

N

External Input

Recognition error

Check and fix

external device/cable

HDMI/ DP

DVI, Optical

Recognition error

Replace Main B/D

Fix in

accordance

with technical

information

D. Function error

External device recognition error

Established

date

Revised date

11/13

Error

symptom

Standard Repair Process

17

Signage Monitor

LGE Internal Use Only

Check

location of

noise

Identify

noise

type

Circuit

noise

Replace PSU(with LED driver)

Replace LED driver

Mechanical

noise

Check location of

noise

OR

※ When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description)

OR

※ If there is a “Tak Tak” noise from the cabinet, refer to the KMS fix information and then proceed as shown in the solution manual (For models without any fix information, provide the description)

OR

※ Mechanical noise is a natural phenomenon, and apply the 1st level description. When the customer does not agree, apply the process by stage. ※ Describe the basis of the description in “Part related to nose” in the Owner’s Manual.

E. Noise

Circuit noise, mechanical noise

Established

date

Revised date

12/13

Error

symptom

Standard Repair Process

18

Signage Monitor

LGE Internal Use Only

Replace module

Zoom part

with exterior

damage

Module

damage

Cabinet

damage

Replace cabinet

Replace remote controller

Remote

controller

damage

Stand

dent

Replace stand

F. Exterior defect

Exterior defect

Established

date

Revised date

13/13

Error

symptom

Standard Repair Process

19

Signage Monitor

LGE Internal Use Only

Contents of LCD TV Standard Repair Process Detail Technical Manual

No. Error symptom Content Page Remarks

1

A. Video error_ No video/Normal audio

Check LCD back light with naked eye A1 2 LED driver B+ 24V measuring method A2 3 Check White Balance value A3 4 Power Board voltage measuring method A4 5

A. Video error_Color error

LCD-TV Version checking method

A7

6 LCD TV connection diagram A8

7 Check Link Cable (LVDS) reconnection condition A10

8 Adjustment Test pattern - ADJ Key A12

9

A. Video error_Vertical/Horizontal bar, residual image, light spot

Check Link Cable (LVDS) reconnection condition

A10

A11 10 Adjustment Test pattern - ADJ Key A12 11 <Appendix>

Defected Type caused by Main/ Inverter/ Module

Exchange LED driver Board (PSU) A-3/5

12 Exchange Module itself (1) A-4/5 13 Exchange Module itself (2) A-5/5

LGE Internal Use Only

Contents of LCD TV Standard Repair Process Detail Technical Manual

No. Error symptom Content Page Remarks

14

B. Power error_No power

Check power input Voltage & ST-BY 5V

A18

15 Checking method when power is ON A19

16

B. Power error_Off when on, off while viewing

POWER OFF MODE checking method A22

17

C. Audio error_No audio/Normal video

Checking method in menu when there is no audio

A24

18

Voltage and speaker checking method when

there is no audio

A25

19

D. Function error_ No response in remote controller, key error

Remote controller operation checking method A27

Continued from previous page

LGE Internal Use Only

Established date

Standard Repair Process Detail Technical Manual

Revised date

A1

Error

symptom

Content

Check LCD back light with naked eye

A. Video error_No video/Normal audio

After turning on the power and disassembling the case, check with the naked eye, whether you can see light from module holes.

A1

Signage Monitor

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

LED driver B+ 24V measuring method

A. Video error_No video/Normal audio

A2

Established

date Revised date

Error

symptom

Content

A2

Check the DC 24V

24 Pin

2, 3, 4 24V

1. Measure DC 24V applying to inverter PCB from Power Board.

2. Output 24V from Power Board -> supply to inverter PCB. Check Pin contacting statement and connection statement.

Signage Monitor

LGE Internal Use Only

Entry method

1. Press the ADJ button on the remote controller for adjustment.

2. Enter into White Balance of item 6.

3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re- enter the value after replacing the MAIN BOARD.

Standard Repair Process Detail Technical Manual

Check White Balance value

A. Video error_No video/Normal audio

A3

Established

date Revised date

Error

symptom

Content

A3

Entry method

1. Press the ADJ button on the remote controller for adjustment.

2. Enter into White Balance of item 10.

3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), reenter the value after replacing the MAIN BOARD.

Signage Monitor

LGE Internal Use Only

24 Pin (Power Board ↔ Main Board)

SMAW200-H24S2

1

Power on

2

24V

3

24V

4

24V

5

GND

6

GND

7

GND

8

GND

9

3.5V

10

3.5V

11

3.5V

12

3.5V

13

GND

14

GND

15

GND

16 N.C

17 12V 18

Inverter On

19 12V 20

PWM#1

21 12V 22

PWM#2

23 N.C 24

ERROR

Standard Repair Process Detail Technical Manual

Power Board voltage measuring method

A. Video error_No video/ Audio

A4

Established

date Revised date

Error

symptom

Content

A4

Check the DC 3.5V, 12V, 24V.

Signage Monitor

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

LCD-TV Version checking method

A. Video error_Video error, video lag/stop

1. Checking method for remote controller for adjustment

Press the IN-START with the remote controller for adjustment

Version

A7

Established

date Revised date

Error

symptom

Content

A7

Signage Monitor

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

LCD TV connection diagram

A. Video error _Vertical/Horizontal bar, residual

image, light spot

As the part connecting to the external input, check the screen condition by signal

A8

Established

date Revised date

Error

symptom

Content

A8

[MS75A]

Signage Monitor

HDMI2

/OPS

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

Check Link Cable reconnection condition

A. Video error_Color error

Check the contact condition of the Link Cable, especially dust or mis insertion.

A10

Established

date Revised date

Error

symptom

Content

A10

Signage Monitor

LGE Internal Use Only

Standard Repair Process Detail Technical Manual

Adjustment Test pattern - ADJ Key

A. Video error_Color error

You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..)

4.Video error (Classification of MODULE or Main-B/D!)

A12

Established

date Revised date

Error

symptom

Content

A12

Signage Monitor

LGE Internal Use Only

Solder defect, CNT Broken

T-Con Defect, CNT Broken

Solder defect, CNT Broken

Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section Solder defect, Short/Crack

Appendix : Exchange LVDS Cable or Main B/D (1)

LGE Internal Use Only

Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section

Solder defect, Short/Crack

Fuse Open, Abnormal power section

Noise GRADATION GRADATION

Abnormal Display

Appendix : Exchange LVDS Cable or Main B/D (2)

LGE Internal Use Only

No picture/Sound Ok

Appendix : Exchange Power Board

No Light

Dim Light

A - 3/5

LGE Internal Use Only

Appendix : Exchange the Module (1)

Panel Mura, Light leakage

Press damage

Crosstalk

Press damage

Panel Mura, Light leakage

Press damage

A - 4/5

Un-repairable Cases In this case please exchange the module.

LGE Internal Use Only

Vertical Block Source TAB IC Defect

Horizontal Block

Gate TAB IC Defect

Vertical Line Source TAB IC Defect

Vertical Block Source TAB IC Defect

Horizontal Block Gate TAB IC Defect

Horizontal line Gate TAB IC Defect

Gate TAB IC Defect

Horizontal Block Gate TAB IC Defect

Appendix : Exchange the Module (2)

A - 5/5

Un-repairable Cases In this case please exchange the module.

LGE Internal Use Only

24 Pin (Power Board ↔ Main Board)

SMAW200-H24S2

1

Power on

2

24V

3

24V

4

24V

5

GND

6

GND

7

GND

8

GND

9

3.5V

10

3.5V

11

3.5V

12

3.5V

13

GND

14

GND

15

GND

16 N.C

17 12V 18

Inverter On

19 12V 20

PWM#1

21 12V 22

PWM#2

23 N.C 24

ERROR

Standard Repair Process Detail Technical Manual

Check power input voltage and ST-BY 3.5V

B. Power error _No power

A18

Established

date Revised date

Error

symptom

Content

A18

Check DC 3.5V

Signage Monitor

LGE Internal Use Only

24 Pin (Power Board ↔ Main Board)

SMAW200-H24S2

1

Power on

2

24V

3

24V

4

24V

5

GND

6

GND

7

GND

8

GND

9

3.5V

10

3.5V

11

3.5V

12

3.5V

13

GND

14

GND

15

GND

16 N.C

17 12V 18

Inverter On

19 12V 20

PWM#1

21 12V 22

PWM#2

23 N.C 24

ERROR

Standard Repair Process Detail Technical Manual

Checking method when power is ON

B. Power error _No power

A19

Established

date Revised date

Error

symptom

Content

A19

Check “power on(Pin 1)” pin is high(about 3.3V)

Signage Monitor

LGE Internal Use Only

Entry method

1. Press the IN-START button of the remote controller for adjustment

2. Check the entry into adjustment item 3

Standard Repair Process Detail Technical Manual

POWER OFF MODE checking method

B. Power error _Off when on, off whiling viewing

A22

Established

date Revised date

Error

symptom

Content

A22

Signage Monitor

LGE Internal Use Only

Checking method

1. Press the MENU button on the remote controller for five seconds.

2. A balloon is marked to a screen.

3. Select the Speaker of Signage Setup

4. Select “ON”

Standard Repair Process Detail Technical Manual

Checking method in menu when there is no audio

C. Audio error_No audio/Normal video

A24

Established

date Revised date

Error

symptom

Content

A24

Signage Monitor

5 Sec

LGE Internal Use Only

24 Pin (Power Board ↔ Main Board)

SMAW200-H24S2

1

Power on

2

24V

3

24V

4

24V

5

GND

6

GND

7

GND

8

GND

9

3.5V

10

3.5V

11

3.5V

12

3.5V

13

GND

14

GND

15

GND

16 N.C

17 12V 18

Inverter On

19 12V 20

PWM#1

21 12V 22

PWM#2

23 N.C 24

ERROR

Checking order when there is no audio

① Check the contact condition of or 24V connector of Main Board

② Measure the 24V input voltage supplied from Power Board

(If there is no input voltage, remove and check the connector)

③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND

and output terminal, the speaker is normal.

Standard Repair Process Detail Technical Manual

Voltage and speaker checking method when there is no audio

C. Audio error_No audio/Normal video

A25

Established

date Revised date

Error

symptom

Content

A25

[MS75A]

< Main Ass’y>

①

②

Signage Monitor

LGE Internal Use Only

Checking order

1. Check IR cable condition between IR & Main board

2. Check the st-by 3.5V on the terminal M1.

3. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all.

Standard Repair Process Detail Technical Manual

Remote controller operation checking method

D. Function error_ No response in remote controller,

key error

A27

Established

date Revised date

Error

symptom

Content

A27

JK1401

M7

GND

M4

+3.5V_ST

M3

NC

M1

IR

M6

SCL

M5

SDA

JK1401

[MS75A Model]

Signage Monitor

LGE Internal Use Only