Samsung 2032BW, 2232BW Schematic

PEBBLE

LCD-Monitor

Chassis : LPE20BS

LPE22BS

Model : 2032BW

2232BW

Manual

SERVICE

TFT-LCD Monitor Contens

1. Precautions

2. Product specications Disassembly and Reassemble

3. Troubleshooting

4. Exploded View & Part List

5. Wiring Diagram

6. Schematic Diagram

2032BW / 2232BW

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 Reassemble ............................................................................... 3-1

3-1. Disassembly ...................................................................................................................3-1

3-2. Stand ....................................................................................

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

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

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

4-3. No Video (Analog) ..........................................................................................................4-3

4-4. No Video (DVI) ................................................................................................................4-5

4-5. Faults and Corrective Actions .........................................................................................4-7

4-6. Adjustment ......................................................................................................................4-8

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

5. Exploded View and Parts List ................................................................................ 5-1

5-1. Exploded View ................................................................................................................5-1

5-2. LS20PEBSFV/EDC Parts List ........................................................................................5-3

5-3. LS22PEBSFV/EDC Parts List ......................................................................................5-10

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

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

6-2. Connector Functions ......................................................................................................6-3

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

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

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

7-2. Schematic Diagrams ...................................................................................

...................7-2

GSPN (Global Service Partner Network)

Area Web Site

North America http://service.samsungportal.com

America http://latin.samsungportal.com

Latin CIS http://cis.samsungportal.com Europe http://europe.samsungportal.com China http://china.samsungportal.com Asia http://asia.samsungportal.com Mideast

This

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

& Africa http://mea.samsungportal.com

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

Printed in Korea P/N: BN82-00138Y-00

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.

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

2. 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

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. 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: 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

1. 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

2. 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

3. 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,

4. input 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. 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.

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

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

7. 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.

2. 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 2032BW / 2232BW

Feature

Minimalism Design Something New

�

Boltless Model (Clean Cut & Soft Surface)

�

New Ball Hinge

�

Fast Response Time

�

Dynamic Contrast

�

Specications

Item Description

Model 2032BW 2232BW

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

2. Product specications

20-Inch viewable, 0.258 (H) x 0.258 (V) mm pixel pitch

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

Vertical : 56 Hz ~ 75 Hz (UXGA : 60 Hz)

Display Colors 16.2 Million colors

Maximum resolution Horizontal: 1680 Pixels

Vertical: 1050 Pixels

Input Signal Analog / Digital

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

Level: TTL level

Maximum Pixel Clock rate 146 MHz

Active Display

Horizontal/Vertical 459.4(H) x 296.4(V) 459.4(H) x 296.4(V)

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

Power Consumption 45 W (Max) 50 W (Max)

Dimensions

Set (W x D x H) 476 x 344 x 70 mm (With Stand) 517 x 372 x 70 mm (With Stand)

Weight (Set) 4.4 kg 4.5 kg

20-Inch viewable, 0.27675 (H) x 0.27675 (V) mm pixel pitch

Environmental Considerations Operating Temperature : 50˚F ~ 104˚F (10˚C ~ 40˚C)

Operating Humidity : 10% ~ 80%

Storage temperature : -13˚F ~ 113˚F (-25˚C ~ 45˚C)

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 Pebble (2032BW/2232BW) Pebble (206BW/226BW)

Design

Resolution 1680 x 1050 1680 x 1050

Input D-Sub, DVI-D D-Sub

Response Time 2ms(G to G) 2ms(G to G)

Viewing Angle 160/160(CR=10) 160/160(CR=10)

Brightness 300cd/m² 300cd/m²

Contrast 1000:1 700:1

MagicBright 6 step 6 step

Pivot X X

Wall mount X X

Feature

Magic Color

Magic Bright3

Magic Tune (Premium)

Magic Color

Magic Bright3

Magic Tune(Premium)

2-3. Accessories

Product Description Ccde. No Remark

2. Product specications

Quick Setup Guide BH68-00376L

Warranty Card

(Not available in all locations)

User’s Guide,

Monitor Driver

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

Power Cord 3903-000042

2-4. Accessories (Sold separately)

Product Description Ccde. No Remark

DVI-D Cable BN39-00246F

BH68-00633A

BN59-00585T

Samsung Electronics

Service center

Samsung Electronics

Service center

2-3

2. Product specications

Memo

2-4

3. Disassembly and Reassemble

This section of the service manual describes the disassembly and reassembly procedures for the LS57BPP LCD monitor.

WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components.

3-1. Disassembly

Cautions: 1. Disconnect the monitor from the power source before disassembly.

2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.

Description Picture Description Screws

1. Placeasoftclothontheoorandplacethe

monitor on it so that the front of the monitor is on the cloth. Lean the top of the stand backwards until it is at an angle of 5° to 10° and hold and push the top of the monitor downwards.

Caution: If you try to forcefully remove the monitor

without leaning the stand backwards, the connecting pin may break. Be careful.

Fragile: Do not break

5° to 10°

2. Turn the monitor so the front section is facing upwards. Remove the marked parts from the

frontcover,asshowninthegurebelow.

3. Remove the marked part from the top edge of

thefrontcover,asshowninthegurebelow.

4. Remove the marked parts from both sides of the

frontcover,asshowninthegurebelow.

3-1

3-2

3. Disassembly and Reassemble

Description Picture Description Screws

5. Remove the marked part from the front cover, as showninthegurebelow.

Caution: Do not lift the front cover over position (1),

which may cause damage to it.

6. Turn the monitor so the back of it is facing upwards. Lift up and remove the back cover.

(A)

7. Use the jig to remove the shield lamp. (Be careful Shield.)

8. Disconnect cables. (LVDS, INVERTER and FUNCTION cable)

9. Lift up the LCD panel.

LVDS

INVERTER

FUNCTION

Description Picture Description Screws

10. Remove 4 screws.

11. Remove 5 screws and Lift up the Bracket Support.

3. Disassembly and Reassemble

Bracket Support

12. Lift up the Main PCB and IB Board.

13. Main PCB and IB Board.

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

3-3

3-4

3. Disassembly and Reassemble

3-2. Stand

3-2-1. Installing the Stand

A: Monitor

B: Connecting pin

C: Stand

Caution

When lifting up or moving the monitor, do not

lift the monitor upside down while holding only

the stand, as this may cause the monitor to

fall, leading to damage

or personal injury.

Description Picture Description

1. Insert the connecting pin into the stand.

2. Standthescrewhandlesupandtightenthescrewsrmly

by turning them.

3. Place the screw handles back down.

Description Picture Description

4. Turn the stand so mark on the connecting pin is facing the front.

5. Check the connecting part between the monitor and the stand.

6. Tilt the monitor upwards at an angle of 5 ° to 10° so that the base is closer to you than the top. Then hold the monitor on the stand by its top parts and push them downwards.

3. Disassembly and Reassemble

(You can assemble it more easily by pushing it down while

wriggling it a little to the left and right.)

7. When the monitor is assembled correctly, the straight groove line at the back of the connecting pin will not be visible when the monitor is erected at 90°.

3-5

3. Disassembly and Reassemble

3-2-2. Removing the Stand

Description Picture Description

1. Place a soft cloth or cushion on the table and place the monitor with the front facing downwards.

2. Hold the monitor and lean the stand upwards.

3. Hold the monitor, and then twist the stand strongly to the left and pull it out.

4. Stand the screw handles up and unfasten the screws by turning them.

5. Remove the connecting pin from the stand.

3-6

4. Troubleshooting

4-1. Troubleshooting

Before troubleshooting, setup the PC ‘s display as below.

• Resolution: 1280 x 1024

• H-frequency: 65 kHz

• V-frequency: 60 Hz

If no picture appears, make sure the power cord is correctly connected.

Check the following circuits.

• No raster appears: Function PBA, Main PBA, I/P PBA

• 5V develop but no screen: Main PBA

• 5V does not develop: I/P PBA

If you select Brightness adjust menu and push the “ returns to factory reset.

(Enter/Source)” button for 5 seconds, the monitor automatically

4. Troubleshooting

4-1

4. Troubleshooting

4-2. No Power

Symptom

Major

checkpoints

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

Check the IP board power fuse and the IP board output power. Check the connections for the IP board and the Main board inside the monitor. Check the Main board power part and check also whether there is any abnormal output at other

output terminals.

Main Board Front

Diagnostics

When Pin 4 of CN600 is 0V,

Does proper DC 14V appear at pin 5 of

CN600?

Yes

When Pin 1 of IC 702 is DC 14V,

Does proper DC5V appear at pin1 of

IC601

Yes

When pin 1 of IC 601 is DC 5V,

Proper DC 3.3V appear at pin 3 of IC

601

Yes

When pin 3 of IC 602 is DC 5V,

Proper DC 1.8V appear at pin 2 of IC

602

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

Yes

Check function assy.

Replace IP board.

Check IC 701 and related

circuit.

Check IC 601 and related

circuit.

Check IC 602 and related

circuit.

4-2

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