Samsung T200, T220 Schematic

LCD-Monitor

Chassis : LTW22HS / LTW22GS

LTW20HS / LTW20GS

Model :

SERVICE

TFT-LCD Monitor Contens

T220 / T220G T220N / T220GN T200 / T200G T200N / T200GN

Manual

T220 / T220G / T220N / T220GN T200 / T200G / T200N / T200GN

1. Precautions

2. Product specications

3. Disassembly and Reassemble

4. Troubleshooting

5. Exploded View & Part List

6. Wiring Diagram

7. Schematic Diagram

Refer to the service manual in the GSPN (see the rear cover) for the more information.

Contents

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

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

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

1-3. Static Electricity Precautions .......................................................................................... 1-2

1-4. Installation Precautions .................................................................................................. 1-3

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

2-1. Feature & Specications ................................................................................................. 2-1

2-2. Spec Comparison to the Old Models .............................................................................. 2-2

2-3. Accessories .................................................................................................................... 2-3

2-4. Accessories (Sold separately) ........................................................................................ 2-3

3. Disassembly and Assembly ................................................................................... 3-1

3-1. SIMPLE STAND Disassembly ........................................................................................ 3-1

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

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

4-2. When the Power Does Not Turn On ............................................................................... 4-2

4-3. When the screen is blank (Analog) .................................................................................4-4

4-4. When a blank screen is displayed (Digital) .....................................................................4-7

4-5. Error Examples and Actions ......................................................................................... 4-10

4-6. Adjustment .................................................................................................................... 4-11

5. Exploded View & Part List ...................................................................................... 5-1

5-1. Exploded View-T200 / T200(G) ...................................................................................... 5-1

5-2. Parts List-T200 / T200(G) ............................................................................................... 5-3

5-3. Exploded View-T220 / T220(G) ...................................................................................... 5-4

5-4. Parts List-T220 / T220(G) ............................................................................................... 5-6

6. Wiring Diagram ........................................................................................................ 6-1

6-1. Wiring Diagram - Main Board ......................................................................................... 6-1

6-2. Wiring Diagram - IP Board .............................................................................................. 6-2

6-3. Connector Functions ...................................................................................................... 6-3

6-4. Cables ............................................................................................................................ 6-3

7. Schematic Diagram ................................................................................................. 7-1

7-1. Circuit Descriptions ......................................................................................................... 7-1

7-2. Schematic Diagrams (Scaler Part) ................................................................................. 7-2

7-3. Schematic Diagrams (Power Flowchart) ........................................................................ 7-2

7-4. Schematic Diagrams (IP Board) ..................................................................................... 7-3

7-5. Schematic Diagrams (Main PBA) .................................................................................. 7-5

GSPN (Global Service Partner Network)

Area Web Site

North America http://service.samsungportal.com

Latin America http://latin.samsungportal.com

CIS http://cis.samsungportal.com

Europe http://europe.samsungportal.com

China http://china.samsungportal.com

Asia http://asia.samsungportal.com

Mideast & Africa http://mea.samsungportal.com

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 P/N: BN82-00357A-01

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.

Disconnect the AC power and DC power jack before servicing.

1-1-2. Servicing the LCD Monitor

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

It is essential that service technicians have an accurate voltage meter available at all times. Check the calibration of this 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 and other metal parts in the monitor.

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

Leakage Current Hot Check (Figure 1-1): WARNING : Do not use an isolation transformer during this test. Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

(READING SHOULD) NOT BE ABOVE 0.5mA

DEVICE UNDER TEST

TEST ALL

EXPOSED METAL

SURFACES

2-WIRE CORD

*ALSO TEST WITH

PLUG REVERSED (USING AC ADAPTER PLUG AS REQUIRED)

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

LEAKAGE CURRENT TESTER

EARTH

GROUND

Figure 1-1. Leakage Current Test Circuit

rst in 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.

1-1

1-2

1. Precautions

1-2. Servicing Precautions

WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of

this manual.

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: (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 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 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 terminals and earphone jacks).

Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. 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; always remove the instrument’s ground lead last.

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 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 of an electrostatic charge.

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

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

Use only an anti-static solder removal device. Some solder removal devices not classied as “anti-static” can generate 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 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 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.

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

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

1. Precautions

1-4. Installation Precautions

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

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

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

temperature 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 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 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

antenna falling over may cause re or electric shock.

When installing the product, leave enough space (10cm) between the product and the wall for ventilation purposes.

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

1-3

1. Precautions

Memo

1-4

2. Product specications

2-1. Feature & Specications

Model T220 / T220G / T200N / T220GN

T200 / T200G / T200N / T200GN

Feature

Panel Specications: 300cd/m2, 2ms, CR 1000:1(DC), 170/160(CR>10)

�

DPMS : <1W

�

Magic Bright3, Magic Tune, Windows Vista authentication

�

DC 20,000: 1 applied

�

Supports xed vertical and horizontal ratios

�

Supports camera effect mode: Black and white/Sepia/Aqua/Green

�

Specications

Item Description

Model T220 / T220G / T200N / T220GN T200 / T200G / T200N / T200GN

2. Product specications

LCD Panel

Scanning Frequency Horizontal : 30 kHz ~ 81 kHz (Automatic)

Display Colors 16.7 Million colors

Maximum resolution Horizontal: 1680 Pixels

Input Signal 22” Dual 20” Dual

Input Sync Signal Seperate H/V sync, Composite H/V, Sync-on-Green

Maximum Pixel Clock rate 135 Mhz

Active Display (Horizontal/Vertical)

AC power voltage & Frequency AC 110V~130V, 60Hz & AC, 200V~240V 50Hz

Power Consumption 45 W 40W

Dimensions Set (W x D x H)

Weight (Set/Package) Set : 5.8kg, Package : 7.5Kg

TFT-LCD panel, RGB vertical stripe, normally white transmissive,

22”wide Viewable 0.258(H) mm x

0.258(V) mm pixel pitch

Vertical: 56 Hz ~ 75 Hz(WSXGA+ : 60Hz)

Vertical: 1050 Pixels

Level: TTL level

473.76(H) x 296.1(V)

520 x 215 x 442 mm 486 x 215 x 422 mm

(With Stand)

20”wide Viewable 0.258(H) mm x

0.258(V) mm pixel pitch

Set : 5.4kg, Package : 7.0Kg (With Stand)

Environmental Considerations Operating Temperature: 10˚C ~ 50˚C(50˚F ~ 122˚F)

Operating Humidity : 10% ~ 90%

Operating Temperature: -20˚C ~ 45˚C(-4˚F ~ 113˚F)

Operating Humidity: 5% ~ 90%

Note: Designs and specications are subject to change without prior notice.

2-1

2-2

2. Product specications

2-2. Spec Comparison to the Old Models

Model

Design

Resolution 1680 x 1050 1440 x 900

Input

Response Time 2ms 5ms(W to B)

Viewing Angle 170/160(CR>10) 170/160(CR>10)

Brightness 300cd/m² 300cd/m²

T220 / T220G / T200N / T220GN T200 / T200G / T200N / T200GN

T220, T220G, T200, T200G :

Analog / DVI Digital

T220N, T220GN, T200N, T200GN :

Analog

Mckinley(943BW)

Analog / Digital with HDCP

Contrast 20,000:1(DC) 1000:1

MagicBright 7 step 7 step

Feature

Magic Color Color Effect

Image Size

Magic Bright3

Magic Tune (Premium)

Magic Color Color Effect

Image Size

Magic Bright3

Magic Tune (Premium)

*Color Effect

- Grey scale: Images are displayed in a grey tone on the screen.

- Green: Images are displayed in a green tone on the screen.

- Aqua: Images are displayed in a blue tone on the screen.

- Sepia: Images are displayed in a brown tone on the screen. Image Size : If the resolution is not wide resolution, this option allows the screen size to be selected as normal or wide.

2-3

2. Product specications

2-3. Accessories

Product Description Ccde. No Remark

Quick Setup Guide BH68-00907A

Warranty Card

(Not available in all locations)

User’s Guide,

Monitor Driver,

Natural Color Pro Software

D-Sub(15 Pin) Cable BN39-00244G

Power Cord 3903-000042

2-4. Accessories (Sold separately)

Product Description Ccde. No Remark

DVI Cable BN39-00246L

BH68-00633B

BN59-00716A

Samsung Electronics

Service center

Samsung Electronics

Service center

2. Product specications

Memo

2-4

3. Disassembly and Assembly

This section describes the disassembly and reassembly sequences for this monitor.

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

3-1. Disassembly

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

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

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

Description Photo Screws

1. Place a soft cloth on the table and place the monitor onto it with the front part facing downwards. Hold the monitor set with one hand and hold and pull the stand body backwards with the other hand to remove the stand body from the monitor set.

2. Insert both hands into the groove and then lift up and remove the cover.

3. Remove the four (2) screws.

3-1

3-2

3. Disassembly and Assembly

Description Photo Screws

4. Remove the cover and the LCD panel using the provided jig on both grooves at the bottom.

5. Remove the INVERTER wire, LVDS cable, and FUNCTION cable, and then remove the SHIELDCOVER.

INVERTER,

LVDS

FUNCTION

Description Photo Screws

6. After disconnecting SHIELD-LAMP of left side, disassemble lamp wire between panel and IP Board.

3. Disassembly and Assembly

7. Removethefour(4)screwsshowninthegure

and remove the Bracket support.

8. Remove the two (2) screws and then remove the holders from the four (4) snaps designated in the

rightgureusingtheprovidedjig.

3-3

3-4

3. Disassembly and Assembly

Description Photo Screws

9. Remove the connectors.

Caution : Servicing is not supported for the PCB.

▶Assembly

10. The assembly is in the reverse order of the disassembly.

11. Connect the disassembled snap and the LED module again.

12.Fixtheconnectingwirewithlamenttape

Caution : If the wire is damaged when closing the

cover, an operating error may occur. Therefore, make sure to close the

coverafterxingitwithlamenttape.

lamenttape

Description Photo Screws

13. The assembly is in the reverse order of the disassembly. Insert the cover into the groove and then press both sides.

※The assembly is in the reverse order of disassembly.

3. Disassembly and Assembly

3-5

3. Disassembly and Assembly

Memo

3-6

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