Samsung 2032BW, 2232BW Schematic

LCD-Monitor

PEBBLE	Chassis	: LPE20BS
		LPE22BS
	Model	: 2032BW
		2232BW

SERVICE Manual

TFT-LCD Monitor		Contens

1. Precautions

2. Product specifications

3. Disassembly and Reassemble

4. Troubleshooting

5. Exploded View & Part List

6. Wiring Diagram

7. 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 specifications.............................................................................................	2-1
	2-1. Feature & Specifications.................................................................................................	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...............................................................................................................................	3-4
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
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
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.

© 2007 Samsung Electronics Co.,Ltd. All rights reserved.

Printed in Korea

P/N: BN82-00138Y-00

1. Precautions

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

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

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

1-1-2. Servicing the LCD Monitor

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

2.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:

1.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.

2.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.

3.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

				LEAKAGE
DEVICE
				CURRENT
UNDER
				TESTER
TEST
	TEST ALL
	EXPOSED METAL
	SURFACES
2-WIRE CORD

*ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)	EARTH
	GROUND	Figure 1-1. Leakage Current Test Circuit

4.With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit’s AC switch first 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 identified 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, fire and/or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate.

1-1

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 conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions.

1-2-1 General Servicing Precautions

1.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.

2.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.

3.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.

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

5.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.

6.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.

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

1.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.

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

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

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

5.Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ESDs.

6.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.

7.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.

8.Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting your foot from a carpeted floor can generate enough static electricity to damage an ESD.

1-2

1. Precautions

1-4. Installation Precautions

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

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

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

4.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 fire or electric shock.

5.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 fire or electric shock.

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

7.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 fire.

1-3

1. Precautions

Memo

1-4

2. Product specifications

2. Product specifications

2-1. Feature & Specifications

Model	2032BW / 2232BW

Feature

Minimalism Design Something New

Boltless Model (Clean Cut & Soft Surface)

New Ball Hinge

Fast Response Time

Dynamic Contrast

Specifications

Item	Description
Model	2032BW	2232BW
LCD Panel	TFT-LCD panel, RGB vertical stripe, normally white transmissive,
	20-Inch viewable, 0.258 (H) x 0.258 (V)	20-Inch viewable, 0.27675 (H) x 0.27675
	mm pixel pitch	(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
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 specifications are subject to change without prior notice.

2-1

2. Product specifications

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 Color
	Magic Bright3	Magic Bright3
	Magic Tune (Premium)	Magic Tune(Premium)

2-2

			2. Product specifications
2-3. Accessories
Product	Description	Ccde. No	Remark
	Quick Setup Guide	BH68-00376L
	Warranty Card	BH68-00633A
	(Not available in all locations)
			Samsung Electronics
	User’s Guide,	BN59-00585T	Service center
	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	Samsung Electronics
			Service center

2-3

2. Product specifications

Memo

2-4

3. Disassembly and Reassemble

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 floor and place the
monitor on it so that the front of the monitor is on
the cloth. Lean the top of the stand backwards
			5° to 10°
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

2.Turn the monitor so the front section is facing upwards. Remove the marked parts from the front cover, as shown in the figure below.

3.Remove the marked part from the top edge of the front cover, as shown in the figure below.

4.Remove the marked parts from both sides of the front cover, as shown in the figure below.

3-1

3. Disassembly and Reassemble

Description

Picture Description

Screws

5.Remove the marked part from the front cover, as shown in the figure below.

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

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

8. Disconnect cables.

(LVDS, INVERTER and FUNCTION cable)

LVDS

INVERTER

FUNCTION

9. Lift up the LCD panel.

3-2

3. Disassembly and Reassemble

Description

Picture Description

Screws

10.Remove 4 screws.

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

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. Disassembly and Reassemble

3-2. Stand

3-2-1. Installing the Stand

A: Monitor

B: Connecting pin

	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
C: Stand	or personal injury.

Description

Picture Description

1. Insert the connecting pin into the stand.

2.Stand the screw handles up and tighten the screws firmly by turning them.

3. Place the screw handles back down.

3-4

3. Disassembly and Reassemble

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.

(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. Troubleshooting

4-1. Troubleshooting

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

•Resolution: 1280 x 1024

•H-frequency: 65 kHz

•V-frequency: 60 Hz

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

3.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

4.If you select Brightness adjust menu and push the “ (Enter/Source)” button for 5 seconds, the monitor automatically returns to factory reset.

4-1

4. Troubleshooting

4-2. No Power

	Symptom	- 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.
	Major	- Check the connections for the IP board and the Main board inside the monitor.
	checkpoints	- Check the Main board power part and check also whether there is any abnormal output at other
		output terminals.

				Main Board Front
Diagnostics				Yes
							Check function assy.
	When Pin 4 of CN600 is 0V,			No
	Does proper DC 14V appear at pin 5 of						Replace IP board.
	CN600?
		Yes
	When Pin 1 of IC 702 is DC 14V,			No			Check IC 701 and related
	Does proper DC5V appear at pin1 of						circuit.
	IC601
		Yes
	When pin 1 of IC 601 is DC 5V,			No			Check IC 601 and related
	Proper DC 3.3V appear at pin 3 of IC						circuit.
	601
		Yes
	When pin 3 of IC 602 is DC 5V,			No			Check IC 602 and related
	Proper DC 1.8V appear at pin 2 of IC						circuit.
	602
Caution	Make sure to disconnect the power before working on the IP board.

4-2