Samsung LT19C300, LT22C300, T24C300 Schematic

LED Monitor

Chassis : WVN2

Model : T19C300**

Chassis : WFB2

Model : T22C300**

T24C300**

SERVICE

LED Monitor Contents

1. Precautions

2. Product specications

3. Disassembly and Reassembly

4. Troubleshooting

5. Wiring Diagram

Manual

LT**C300**

Contents

1. Precautions ...................................................................................................................1-1

1-1. Safety Precautions ..............................................................................................................1-1

1-1-1. Warnings .......................................................................................................................1-1

1-1-2. Servicing the LED Monitor ............................................................................................1-1

1-1-3. Fire and Shock Hazard .................................................................................................1-1

1-1-4. Product Safety Notices .................................................................................................1-1

1-2. Servicing Precautions ..........................................................................................................1-2

1-2-1. General Servicing Precautions .....................................................................................1-2

1-3. Static Electricity Precautions ...............................................................................................1-3

1-4. Installation Precautions .......................................................................................................1-4

2. Product specications .................................................................................................2-1

2-1. Model Comparison ..............................................................................................................2-1

2-2. Feature & Specications ......................................................................................................2-2

2-2-1. Feature ..........................................................................................................................2-2

2-2-2. Specications ................................................................................................................2-3

2-3. Specication Comparison to Old Models.............................................................................2-6

2-4. Detail Factory Option ........................................................................................................... 2-7

2-5. Accessories .........................................................................................................................2-8

3. Disassembly and Reassembly ....................................................................................3-1

3-1. Disassembly and Reassembly ............................................................................................3-1

4. Troubleshooting ...........................................................................................................4-1

4-1. Previous check ....................................................................................................................4-1

4-2. How to check fault symptom ................................................................................................4-2

4-2-1. No Power ......................................................................................................................4-2

4-2-2. No video (Analog PC signal) .........................................................................................4-4

4-2-3. No video (HDMI1 - Digital signal) ..................................................................................4-7

4-2-4. No video (Tuner_CVBS) .............................................................................................4-10

4-2-5. No video (Tuner DTV) .................................................................................................4-14

4-2-6. No video (Video CVBS) ..............................................................................................4-18

4-2-7. No video (Component) ................................................................................................4-22

4-2-8. No sound .....................................................................................................................4-25

4-4. Adjustment .........................................................................................................................4-28

4-4-1. Service Instruction ......................................................................................................4-28

4-4-2. How to Access Service Mode .....................................................................................4-28

4-4-3. Service Mode Menu ....................................................................................................4-29

4-4-4. White Balance - Calibration ........................................................................................4-41

4-4-5. White Balance - Adjustment ........................................................................................4-43

4-5. Software Upgrade ..............................................................................................................4-45

4-5-1. How to check the SW version .....................................................................................4-45

4-5-2. How to Upgade SW and Micom ..................................................................................4-47

5. Wiring Diagram .............................................................................................................5-1

5-1. Wiring Diagram .................................................................................................................... 5-1

5-2. Board Connection ................................................................................................................ 5-2

5-3. Connector Functions ...........................................................................................................5-4

5-4. Cables .................................................................................................................................5-4

A. Exploded View & Part List [TC300] ........................................................................... A-1

A-1. Exploded View ................................................................................................................... A-1

A-1-1. Parts List (T19C300**) ................................................................................................. A-2

A-1-2. Electrical Parts List (T19C300**) ................................................................................. A-2

A-2-1. Parts List (T22C300**) ................................................................................................. A-5

A-2-2. Electrical Parts List (T22C300**) ................................................................................. A-5

A-3-1. Parts List (T24C300**) ................................................................................................. A-8

A-3-2. Electrical Parts List (T24C300**) ................................................................................. A-8

This Service Manual is a property of Samsung Electronics Co.,Ltd.

Any unauthorized use of Manual can be punished under applicable International and/or domestic law.

Printed in Korea

3. Disassembly and Reassemble

3. Disassembly and Reassembly

This section of the service manual describes the disassembly and reassembly procedures for the Monitor.

As this monitor has parts that are sensitive to static electricity, be careful when handling them.

WARNING

3-1. Disassembly and Reassembly

Turn the monitor off before beginning the disassembly process.1.

When disassembling the monitor, do not use any metal tools except for the provided jig.2.

CAUTION

Place monitor face down on

cushioned table.

Disassemble the monitor carefully as directed in the following procedures.3.

Description Inch Picture Description Screws

Remove single screw from the

stand.

All

3-1

3-2

3. Disassembly and Reassemble

3-3

3. Disassembly and Reassemble

Description Inch Picture Description Screws

Remove 4 screws from the rear-

cover.

Remove 3 screws from the rearcover.

21.5" 24"

18.5"

6003-001086

Remove the one screw in

interface area.

18.5"

21.5" 24"

6003-001782

Description Inch Picture Description Screws

3-3

3. Disassembly and Reassemble

3-3

3. Disassembly and Reassemble

Detach the front from monitor.

: locking point (14 point)

All

Lift up the rear-cover.

Remove the 4 screws of main

board and 3 screws SMPS board.

All

6003-000115

All

3-4

3. Disassembly and Reassemble

3-5

3. Disassembly and Reassemble

Description Inch Picture Description Screws

Remove the left and right

speaker.

Remove the panel bracket.

All

Lift up the panel bracket.

Lift up the panel.

: locking point

All

How to disassembly Function & IR ASSY

3-5

3. Disassembly and Reassemble

3-5

3. Disassembly and Reassemble

Description Inch Picture Description Screws

There is no clip.

Heat the Function Assy by Heat

Gun and Lift up the Function Assy.

All

NOTE

Reassembly procedures are in the reverse order of disassembly procedures.

1. Precautions

1-1. Safety Precautions

Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock.

1-1-1. Warnings

For continued safety, do not attempt to modify the circuit board.

WARNING

1-1-2. Servicing the LED Monitor

When servicing the LED Monitor, Disconnect the AC line cord from the AC outlet.1.

It is essential that service technicians have an accurate voltage meter available at all times. Check the calibration of this 2. meter periodically.

1-1-3. Fire and Shock Hazard

Before returning the monitor to the user, perform the following safety checks:

Inspect each lead dress to make certain that the leads are not pinched or that hardware is not lodged between the chassis 1. and other metal parts in the monitor.

Inspect all protective devices such as nonmetallic control knobs, insulating materials, cabinet backs, adjustment and 2. compartment covers or shields, isolation resistorcapacitor networks, mechanical insulators, etc.

Leakage Current Hot Check:3.

Disconnect the AC power and DC power jack before servicing.

(READING SHOULD)

DEVICE UNDER

TEST

ALSO TEST WITH PLUG REVERSED (USING AC ADAPTER PLUG AS REQUIRED)

NOT BE ABOVE 0.5mA

EXPOSED METAL

2-WIRE CORD

TEST ALL

SURFACES

LEAKAGE

CURRENT

TESTER

EARTH

GROUND

Do not use an isolation transformer during this test.

Use a leakage current tester or a metering system that complies with American National Standards

WARNING

Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit’s AC switch rst in 4.

the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including: metal cabinets, screwheads and control shafts. The current measured should not exceed 0.5 milliamp. Reverse the power-plug prongs in the AC outlet and repeat the test.

1-1-4. Product Safety Notices

Some electrical and mechanical parts have special safetyrelated characteristics which are often not evident from visual inspection. The protection they give may not be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identied by on schematics and parts lists. A substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock,

re and/or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate.

1-2 1-3

1. Precautions 1. Precautions

1-2. Servicing Precautions

An electrolytic capacitor installed with the wrong polarity might explode.

WARNING

Before servicing units covered by this service manual, read and follow the Safety Precautions section of

CAUTION

NOTE

1-2-1. General Servicing Precautions

Always unplug the unit’s AC power cord from the AC power source and disconnect the DC Power Jack before attempting to: 1. (a) remove or reinstall any component or assembly, (b) disconnect PCB plugs or connectors, (c) connect a test component in parallel with an electrolytic capacitor.

Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The 2. internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.

After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the 3. area around the serviced part has not been damaged.

Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input 4. terminals and earphone jacks).

Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. 5. Connect an insulation resistance meter (500 V) to theblades of the AC plug. The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm.

Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; 6. always remove the instrument’s ground lead last.

this manual.

If unforeseen circumstances create conict between the following servicing precautions and any of the

safety precautions, always follow the safety precautions.

1-3. Static Electricity Precautions

Some semiconductor (solid state) devices can be easily damaged by static electricity. Such components are commonly

called Electrostatically Sensitive Devices (ESD). Examples of typical ESD are integrated circuits and some eld-effect

transistors. The following techniques will reduce the incidence of component damage caused by static electricity.

Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your body 1. by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. To avoid a shock hazard, be sure to remove the wrist strap before applying power to the monitor.

After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent accumulation 2. of an electrostatic charge.

Do not use freon-propelled chemicals. These can generate electrical charges sufcient to damage ESDs.3.

Use only a grounded-tip soldering iron to solder or desolder ESDs.4.

Use only an anti-static solder removal device. Some solder removal devices not classied as “anti-static” can generate 5. electrical charges sufcient to damage ESDs.

Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs are 6. packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive materials.

Immediately before removing the protective material from the leads of a replacement ESD, touch the protective material to 7. the chassis or circuit assembly into which the device will be installed.

Be sure no power is applied to the chassis or circuit and observe all other safety precautions.

CAUTION

Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, 8.

or lifting your foot from a carpeted oor can generate enough static electricity to damage an ESD.

1. Precautions 1. Precautions

1-4. Installation Precautions

For safety reasons, more than a people are required for carrying the product.1.

Keep the power cord away from any heat emitting devices, as a melted covering may cause re or electric shock.2.

Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal temperature 3.

may cause re.

Bend the external antenna cable when connecting it to the product. This is a measure to protect it from being exposed to 4.

moisture. Otherwise, it may cause a re or electric shock.

Make sure to turn the power off and unplug the power cord from the outlet before repositioning the product. Also check the 5.

antenna cable or the external connectors if they are fully unplugged. Damage to the cord may cause re or electric shock.

Keep the antenna far away from any high-voltage cables and install it rmly. Contact with the highvoltage cable or the 6. antenna falling over may cause re or electric shock.

When installing the product, leave enough space (0.4m) between the product and the wall for ventilation purposes. 7.

A rise in temperature within the product may cause re.

If an equipment is provided with a replaceable battery, and if replacement by an incorrect type could result in an 8. explosion (for example, with some lithium batteries), the following applies:

RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.

CAUTION

DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.

1-4 PB

2. Product specications

2-1. Model Comparison

Front View

Detail View

2. Product specications

TC300

Front Color Semitransparent Rose Black

Panel Type TN

Internal Memory None

DDR 256 Mbtye

Feature Media Play(MOVIE)

2-1

2-2

2. Product specications

2-3

2. Product specications

2-2. Feature & Specications

2-2-1. Feature

RF, 1-HDMI, 1-Component, 1-A/V, 1-USB2.0, D-SUB•

Brightness: 250cd/m•

High Contrast Ratio: 1,000 •

Response Time: 5ms •

Excellent Picture Quality•

Dynamic Contrast •

Automatically detects the input visual signal and adjusts to create optimum contrast. -

Monitor Tuner, HDMI, Stereo, SRS Trusurround support •

Convenience •

The Monitor utilizes the HDMI system to implement perfect digital sound and picture quality. -

2-3

2. Product specications

2-3

2. Product specications

2-2-2. Specications

Model Name T19C300**

Item Description

LCD Panel 19 inch HD 60Hz

Scanning Frequency Horizontal: 31 kHz ~ 80 kHz (Automatic)

Vertical: 50 Hz ~ 75 Hz (Automatic)

Display Colors 16.7 Million colors

Maximum resolution Horizontal : 1366 Pixels

Vertical : 768 Pixels

Input Signal Analog 0.7 Vp-p ± 5% positive at 75Ω, internally terminated

Input Sync Signal

Maximum Pixel Clock rate 85 MHz

Active Display (Horizontal/Vertical) 409.8 (H) x 230.4 (V) (mm) / 16.1 (H) x 9.1 (V) (inches)

AC power voltage & Frequency AC 90V~240V, 60/50Hz ± 3Hz

Power Consumption Under 35 W(Under 0.5 W, Stand by)

Dimensions (WxHxD)

Weight With Stand 3.2 (kg) / 7.05 (lbs)

TV System Tuning Frequency Synthesize

Audio Specications MAX Internal Audio Output Power : Each 5W(Left/Right)

Environmental

considerations

With Stand 444.7 x 356.4 x 187 (mm) / 17.5 x 14.0 x 7.4 (inches)

Without Stand 444.7 x 278.2 x 48.5 (mm) / 17.5 x 11.0 x 2.0 (inches)

Without Stand 3.05 (kg) / 6.72 (lbs)

System NTSC, PAL

Sound NTSC, PAL

Operating Operating Temperature : 50°F - 104°F (10°C - 40°C)

H/V Separate, TTL, P. or N.

Equalizer : 5band

Output Frequency

RF : 20 Hz ~ 15.4 kHz•

AV/Componet/HDMI : 20 Hz ~ 20 kHz•

Humidity : 10% - 80 %

Storage Storage Temperature : -4°F - 113°F (-20°C - 45°C)

Humidity : 5% - 95%

Note: Dolby Digital +, Game Mode, Film Mode, Energy Saving

2-4

2. Product specications

2-5

2. Product specications

Model Name T22C300**

Item Description

LCD Panel 21.5 inch FHD 60Hz

Scanning Frequency Horizontal: 31 kHz ~ 80 kHz (Automatic)

Vertical: 50 Hz ~ 75 Hz (Automatic)

Display Colors 16.7 Million colors

Maximum resolution Horizontal: 1920 Pixels

Vertical: 1080 Pixels

Input Signal Analog 0.7 Vp-p ± 5% positive at 75Ω, internally terminated

Input Sync Signal

Maximum Pixel Clock rate 85 MHz

Active Display (Horizontal/Vertical) 476.6 (H) x 268.1 (V) (mm) / 18.8 (H) x 10.6 (V) (inches)

AC power voltage & Frequency AC 90V~240V, 60/50Hz ± 3Hz

Power Consumption Under 35 W(Under 0.5 W, Stand by)

Dimensions (WxHxD)

Weight With Stand 3.95 (kg) / 8.7 (lbs)

TV System Tuning Frequency Synthesize

Audio Specications MAX Internal Audio Output Power : Each 5W(Left/Right)

Environmental

considerations

With Stand

Without Stand 509.7 x 318.2 x 47 (mm) / 20.1 x 12.5 x 1.9 (inches)

Without Stand 3.7 (kg) / 8.16 (lbs)

System NTSC, PAL

Sound NTSC, PAL

Operating Operating Temperature : 50°F - 104°F (10°C - 40°C)

H/V Separate, TTL, P. or N.

509.7 x 396.6 x 195 (mm) / 20.1 x 15.6 x 7.7 (inches)

Equalizer : 5band

Output Frequency

RF : 20 Hz ~ 15.4 kHz•

AV/Componet/HDMI : 20 Hz ~ 20 kHz•

Humidity : 10% - 80 %

Storage Storage Temperature : -4°F - 113°F (-20°C - 45°C)

Humidity : 5% - 95%

Note: Dolby Digital +, Game Mode, Film Mode, Energy Saving

2-5

2. Product specications

2-5

2. Product specications

Model Name T24C300**

Item Description

LCD Panel 24 inch FHD 60Hz

Scanning Frequency Horizontal: 31 kHz ~ 80 kHz (Automatic)

Vertical: 50 Hz ~ 75 Hz (Automatic)

Display Colors 16.7 Million colors

Maximum resolution Horizontal: 1920 Pixels

Vertical: 1080 Pixels

Input Signal Analog 0.7 Vp-p ± 5% positive at 75Ω, internally terminated

Input Sync Signal

Maximum Pixel Clock rate 85 MHz

Active Display (Horizontal/Vertical) 531.36 (H) x 298.89 (V) (mm) / 20.92 (H) x 11.77 (V) (inches)

AC power voltage & Frequency AC 90V~240V, 60/50Hz ± 3Hz

Power Consumption Under 40 W(Under 0.5 W, Stand by)

Dimensions (WxHxD)

Weight With Stand 4.45 (kg) / 9.81 (lbs)

TV System Tuning Frequency Synthesize

Audio Specications MAX Internal Audio Output Power : Each 5W(Left/Right)

Environmental

considerations

With Stand 569.2 x 428 x 195 (mm) / 22.4 x 16.9 x 7.7 (inches)

Without Stand 569.2 x 349.4 x 49 (mm) / 22.4 x 13.8 x 1.9 (inches)

Without Stand 4.15 (kg) / 9.15 (lbs)

System NTSC, PAL

Sound NTSC, PAL

Operating Operating Temperature : 50°F - 104°F (10°C - 40°C)

H/V Separate, TTL, P. or N.

Equalizer : 5band

Output Frequency

RF : 20 Hz ~ 15.4 kHz•

AV/Componet/HDMI : 20 Hz ~ 20 kHz•

Humidity : 10% - 80 %

Storage Storage Temperature : -4°F - 113°F (-20°C - 45°C)

Humidity : 5% - 95%

Note: Dolby Digital +, Game Mode, Film Mode, Energy Saving

2-6

2. Product specications

2-7

2. Product specications

2-3. Specication Comparison to Old Models

O : application, X : non-application

Model

TC300

(T**C300)

TB300 / TB350 / TB530 /TB531

(T**B300 / T**B350 / T**B530/T**B531)

Design

Diplay Type LCD LCD

Built-in Tuner 1 1

Resolution

1920 x 1080 (21.5", 24")

1366 x 768 (18.5")

1920 x 1080 (21.5", 23", 23.6", 24", 27")

1366 x 768 (18.5")

LCD Panel TFT LED PANEL TFT LED PANEL

Screen Size 19" / 22" / 24" 19" / 22" / 23" / 23.6" / 24" / 27"

Picture ratio 16:9 16:9

Brightness 250 cd/m

250 cd/m

Contrast Ratio 1,000 1,000

Picture Enhancer HyperReal Engine (X9) HyperReal Engine (X9)

Equalizer 5 Band 5 Band

Auto Volume Control O O

Surround Sound Dolby Digital Plus/Pulse Dolby Digital Plus/Pulse

Speaker Output 5W X 5W 5W X 5W

PIP O O

Double Window O O

Caption O O

Entertainment Mode X X

Game Mode O O

Energy Saving O O

Anynet+ X X

Antenna 1(Cable/Air) 1(Cable/Air)

2-7

2. Product specications

2-7

2. Product specications

2-4. Detail Factory Option

If you replace the main board with new one, please change the factory option as well. The options you must change are “Type”

TC300 

Model Name T19C300** T22C300** T24C300**

Vendor AML CMI AUO

Panel

SMPS PD Board BN44-00504A BN44-00505A BN44-00505A

Byte Item

0 Factory Reset

1 Type 19A6TH1E 22D6TF0E 24L6TF0E

2 Local Set EU

3 Model TC300

4 SVC Model 300

4 Tuner

5 Ch Table NONE

6 Front Color NONE

CODE BN07-01043A BN07-01076A BN07-00929A

SPEC LTM185AT05-V M215HGE-L21 M240HW01-VB

AUTO/SI_ATC2/SEC_TC/SEC_ISDB/DVB_TCS2/

DVB_T2C/DVB_T2CS2/ECHO_CD/NO_TUNER

2. Product specications

2-5. Accessories

Product Description Code. No Remark

Remote Control &

Batteries

(AAA x 2)

Quick Setup Guide BN68-04796A

Cloth clean BN63-01798B

Owners Manual BN46-00319A

AA59-00622A

4301-000121

Samsung Electronics

Service Center

Power Cord 3903-000525

D-Sub Cable BN39-00244H

Stereo Cable BN39-01286A

Stand Base -

(The part code for some

accessories may differ

depending on your

region.)

2-8

Stand Body & Screw

(1EA)

4. Troubleshooting

4-1. Previous check

Check the various cable connections rst.1.

Check to see if there is a burnt or damaged cable. -

Check to see if there is a disconnected or loose cable connection. -

Check to see if the cables are connected according to the connection diagram. -

Check the power input to the Main Board.2.

4. Troubleshooting

LVDS Cable

SMPS Assy

14P Cable

Speaker

Main Assy

1 B5V 8 GND

2 SW_POWER 9 B12VS

3 B5V 10 SW_INVERTER

4 A5V 11 B13V

5 GND 12 NC

6 GND 13 B13V

7 B12VS 14 PWM_DIMM

Main Assy

Speaker

SMPS Assy

1 B13V 8 PWM_DIMM

2 B13V 9 NC

3 Vamp 10 BLU_ON

4 Vamp 11 GND

5 GND 12 GND

6 B5V 13 A5V

7 B5V 14 PS_ON

4-1

4-2

4. Troubleshooting

4-3

4. Troubleshooting

4-2. How to check fault symptom

4-2-1. No Power

Symptom

Major

checkpoints

Diagnostics

The LED on the front panel of the monitor does not work when the power is connected and the Power

button is pressed.

Check if the Power switch on the rear panel of the monitor has been turned on.•

Check the SMPS fuse and output power of power adapter.•

Check the power part of the Main Board and check if a similar symptom appears at another output • terminal.

Power indicator LED on?

Yes

Check the 14P power cable.

Yes

Check the ‘Stand-By 5V’, DCA5V appear

at BD207?

Yes

Check the ‘Power input of Main Ass’y’ ?

DC B13V, B5V appear at BD209(B13V),

BD213/208(B5V)?

Yes

Check the ‘Power input of submicom

IC(A3.3V)’ ?

Check the ‘Power of nand ash

IC(B3.3V)’ , ‘Power of main IC(B2.5V,

B1.1V)’, ‘Power of DDR IC(B1.5V)’

appear at IC202(#5), L201 (B3.3V),

BD1008/9/10/11 (B2.5V), BD1002

(B1.2V), BD1012 (B1.5V)?

Check an AC power connection.

Change 14p power cable and

SMPS.

Change SMPS.

Change the Main Assy.

Yes

Check ‘Power of LVDS (13V)’ appear

at LVDS connector Pin #1~5 of T-con

board?

Yes

Please, Contact tech support.

Caution Make sure to disconnect the power before working on the SMPS board.

Reconnect of Change the LVDS

cable.

+ 51 hidden pages