Samsung S19A100N, S22A100N Schematic

LCD-Monitor

Chassis : L1S19NS-WVA7

Model : S19A100N

Chassis : L1S22NS-WDA3

Model : S22A100N

Manual

SERVICE

TFT-LCD Monitor Contens

1. Precautions

2. Product specications

3. Disassembly and Reassemble

4. Troubleshooting

5. Wiring Diagram

S19A100N / S22A100N

Contents

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

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

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

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

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

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

3-1. 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 ............................................................................................... 4-4

4-4. Error Examples and Actions ........................................................................................... 4-7

4-5. Adjustment ...................................................................................................................... 4-8

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

5-1. Wiring Diagram - Main Board ......................................................................................... 5-1

5-2. Board Connection ........................................................................................................... 5-3

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

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

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

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.1.

Disconnect the AC power and DC power jack before servicing.2.

1-1-2. Servicing the LCD Monitor

When servicing the LCD 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 1. chassis 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 (Figure 1-1):3.

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

2-WIRE CORD

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

TEST ALL EXPOSED METAL SURFACES

LEAKAGE CURRENT TESTER

EARTH GROUND

Figure 1-1. Leakage Current Test Circuit

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

1-2

1. Precautions

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. Servicing Precautions

An electrolytic capacitor installed with the wrong polarity might explode.

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

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

precautions, always follow the safety precautions.

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 1. 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. 2. 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 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.

1-3

1. 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 1. 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 2. accumulation 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 6. 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 7. to 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.

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.

1-4. 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 5.

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 6. 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. 7.

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

2. Product specications

2-1. Feature & Specications

Brightness(Typical) : 200 cd/m ሪ

Response Time(Typical) : 5ms ሪ

Contrast Ratio(Typical) : 600:1 ሪ

Viewing Angle (Horizontal/Vertical) : 90˚/65˚ (CR>10) ሪ

Stand by Power(DPMS) : 0.3W(Typical) ሪ

Special Features : One key operation, MagicTune operation ሪ

Item Description

Model S22A100N S19A100N

2. Product specications

Feature

Specications

LCD Panel

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

Display Colors 16.7 Million colors

Maximum resolution

Input Signal Analog

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

Maximum Pixel Clock rate 185 MHz 95 MHz

Active Display (Horizontal / Vertical)

Power Consumption 28 W 17 W

Dimensions Set (W x H x D)

Weight Set 2.6 kg (Product Weight )

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

21.5” Wide

0.24825mm(H) x 0.24825(V) pixel pitch

Vertical: 56 Hz ~ 75 Hz

Horizontal: 1920 Pixels

Vertical: 1080 Pixels

Level:TTL level

476.64(H) x 268.11(V) 409.8(H) x 230.4(V)

510.2 x 404.6 x 239.2 mm (with stand)

510.2 x 323.4 x 59.8 mm (without stand)

4 kg (Shipment Weight)

18.5” Wide

0.3 mm(H) x 0.3 mm(V) pixel pitch

Horizontal: 1366 Pixels

Vertical: 768 Pixels

443.4 x 366.6 x 214.2 mm (with stand)

443.4 x 283.0 x 60.1 mm (without stand)

2.1 kg (Product Weight )

3.3 kg (Shipment Weight)

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

Operating Humidity : 10% ~ 80%

Storage Temperature: -20˚C ~ 60˚C(-4˚F ~ 140˚F)

Storage Humidity: 5% ~ 95%

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

Input Analog Analog

Response Time 5ms 5ms

Viewing Angle 90/65(CR>10) 90/65(CR>10)

Brightness 200 cd/m² 200 cd/m²

Contrast 600:1 600:1

S19A100N / S22A100N

S22A100N : 1920 x 1080

[SA100]

S19A10N : 1366 x 768

[SA10]

S19A10N

1366 x 768

Feature

What is MagicTune? ሪ

MagicTune is a software program that helps with monitor adjustments by providing comprehensive descriptions of monitor functions and easy-to-understand guidelines.

Users can adjust the product with the mouse and the keyboard without using the operating buttons of the product.

One key operation

Magic Tune

One key operation

Magic Tune

2-3

2. Product specications

2-3. Accessories

Product Description Code. No Remark

Installation Manual BN68-03796A

Warranty Card

(Not available in all locations)

Power Cord 3903-000382

Adapter BN44-00394A

D-Sub Cable BN39-00244H

BN68-00226R

Samsung Electronics

Service center

3. Disassembly and Assembly

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

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

3-1. Disassembly

Turn the monitor off before beginning the disassembly process.1. When disassembling the monitor, do not use any metal tools except for the 2.

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

Description Photo Screws

1. Turn the monitor over and insert your hands into the top of the monitor at the center and separate the front cover in the direction of the arrow as

shown in the gure.

3. Disassembly and Assembly

2. Turn the monitor over again to remove the back cover.

3. Remove the LVDS, LAMP wire, FUNCTION cable, and then remove the SHIELD-COVER.

3-1

3. Disassembly and Assembly

Description Photo Screws

4. Remove the LCD panel.

5. Remove the two screws shown in the gure and

remove the Bracket support.

6. Remove the main PCB from the Shield Cover.

Reassembly procedures are in the reverse order of disassembly procedures. N

3-2

4. Troubleshooting

4-1. Troubleshooting

Set custom mode as follows before beginning a repair.1.

S22A100N

Resolution: 1920 X 1080 -

S19A100N

Resolution: 1366 X 768 -

If the screen is blank, check whether the power cord is connected correctly.2.

The circuits to check:3.

When the raster does not appear: The Function PCB, Main PCB, Adapter -

When 5V is generated but a blank screen is displayed: Main PCB -

When 5V is not generated: Adapter -

“Press the MENU button and hold down the, “4. (Enter, Source)” button for more than ve (5) seconds to return the monitor to factory mode.

4-1

4-2

4. Troubleshooting

4-2. When the Power Does Not Turn On

Symptom

Major

checkpoints

When turning on the Power button after connecting the power cable, the LED at the front of the monitor does not operate.

Check the IC601 power fuse and the adapter. -

Check the connections for the CN600 and the Main board inside the monitor. -

Check the Main board power part and also check whether there is any abnormal output at any of the other output terminals.

IC601

Diagnostics

Is DC 5V measured at pins 4, 5 of

the CN600 connector when pins 1, 2, 3

Is DC 3.3V measured at pin 5 of

IC601 when pin 4 is DC 5V?

Check and replace the Main board.

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

CN600

are 0V?

Yes

Check the connection status for

the function assy.

Replace the Adapter.

Check the circuits related to

IC601.

4-3

4. Troubleshooting

4-2-1. Circuit diagrams when the power does not turn on

4-4

4. Troubleshooting

4-3. When the screen is blank

Symptom Even though the LED power turns on, the screen is blank when connecting the VGA cable. -

Major

checkpoints

Check the D-sub cable connections. -

Check whether the LVDS cable is connected correctly to the panel. -

Check whether the lamp connector of the panel is connected correctly to the Main board. -

CN400

IC601

IC400

X401

R107 ~ R112

CN600

Diagnostics

Check the signal cables and their

connections.

Yes

1 Is X401 oscillating correctly?

Yes

Do the RGB inputs appear at

R107~R112?

Yes

Do the 2 Hsync and 3 Vsync

waveforms appear at pins 38, 39 of

IC400, respectively?

Yes

Do output signals appear at pins 13,14,

16,17,19,20,22,23,25,26 of CN400?

Yes

Is DC 5V measured at pins 1 ~ 5

of the CN400?

Yes

Check and replace the circuits

related to X401.

Check the R107~R112 input

terminals.

Check the circuits related to

IC400.

Check the circuits related to

CN400.

Check the +5V_Panel signal

and the BL_EN signal.

Check and replace the panel.

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

4-5

4. Troubleshooting

4-3-1. When a blank screen is displayed

4-6

4. Troubleshooting

4-3-2. Waveforms when no screen is displayed

4-7

4. Troubleshooting

4-4. Error Examples and Actions

Error Appearance Symptoms and Actions Remarks

Symptom: A full white screen is displayed regardless of the signals when turning on the monitor.

Cause: This error occurs when only lamp power is

supplied and the video signals are not input to the

panel due to an LVDS cable connection error.

Action: Replace the LVDS cable or connect the cable

correctly so that the video signals can be supplied to

the panel.

A Full White pattern is a feature of •

a TN panel when no video signals

are supplied.

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