LCD-MonitorChassis :LPE20BS/LPE20JS

LPE22BS/LPE22JSLPE22YS

Model :2032BW/2032GW2232BW/2232GW2232GWPlus

SERVICE ManualTFT-LCD Monitor Contens

2032BW/2032GW/2232BW/2232GW/2232GWPlus

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

PEBBLE

1.Precautions

2. Product specifications

3.DisassemblyandReassemble

4.Troubleshooting

5.ExplodedView&PartList

6.WiringDiagram

7.SchematicDiagram

Contents1.Precautions.............................................................................................................. 1-1

1-1. Safety Precautions ......................................................................................................... 1-11-2. Servicing Precautions ..................................................................................................... 1-21-3. Static Electricity Precautions .......................................................................................... 1-21-4. Installation Precautions .................................................................................................. 1-3

2. Product specifications............................................................................................ 2-12-1. Feature & Specifications ................................................................................................. 2-12-2. Spec Comparison to the Old Models .............................................................................. 2-22-3. Accessories .................................................................................................................... 2-32-4. Accessories (Sold separately) ........................................................................................ 2-3

3.DisassemblyandReassemble............................................................................... 3-13-1. Disassembly ................................................................................................................... 3-13-2. Stand .............................................................................................................................. 3-4

4.Troubleshooting...................................................................................................... 4-14-1. Troubleshooting .............................................................................................................. 4-14-2. No Power ........................................................................................................................ 4-24-3. No Video (Analog) .......................................................................................................... 4-34-4. No Video (DVI) ................................................................................................................ 4-54-5. Faults and Corrective Actions ......................................................................................... 4-74-6. Adjustment ...................................................................................................................... 4-8

5.ExplodedViewandPartsList................................................................................ 5-1

6.WiringDiagram........................................................................................................ 6-16-1. Wiring Diagram ............................................................................................................... 6-16-2. Connector Functions ...................................................................................................... 6-36-3. Cables ............................................................................................................................ 6-3

7.SchematicDiagram................................................................................................. 7-17-1. Circuit Descriptions ......................................................................................................... 7-17-2. Schematic Diagrams ...................................................................................................... 7-2

1-1

1. Precautions

1. Precautions

1-1. Safety PrecautionsFollow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock.

1-1-1. WarningsFor 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 MonitorWhen 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 HazardBefore 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).

With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the units 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 NoticesSome 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.

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DEVICEUNDERTEST

(READING SHOULD) NOT BE ABOVE 0.5mA

LEAKAGECURRENTTESTER

TEST ALLEXPOSED METALSURFACES

2-WIRE CORD

*ALSO TEST WITHPLUG REVERSED(USING AC ADAPTERPLUG AS REQUIRED) EARTH

GROUND Figure 1-1. Leakage Current Test Circuit

1-2

1. Precautions

1-2. Servicing PrecautionsWARNING: 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 PrecautionsAlways unplug the units 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 instruments ground lead to the instrument chassis ground before connecting the positive lead; always remove the instruments ground lead last.

1-3. Static Electricity PrecautionsSome 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.

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 sufficient 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 classified as anti-static can generate electrical charges sufficient 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 floor can generate enough static electricity to damage an ESD.

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1-3

1. Precautions

1-4. Installation PrecautionsFor 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 fire 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 fire.

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.

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.

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.

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.

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1. Precautions

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2-1

2. Product specifications

2. Product specifications

2-1. Feature & SpecificationsModel 2032BW / 2032GW / 2232BW / 2232GW/ 2232GW Plus

Feature

Minimalism Design Something NewBoltless Model (Clean Cut & Soft Surface)New Ball HingeFast Response TimeDynamic Contrast

Specifications

Item Description

Model 2032BW / 2032GW 2232BW / 2232GW / 2232GW Plus

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

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

22-Inch viewable, 0.27675 (H) x 0.27675 (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 PixelsVertical: 1050 Pixels

Input Signal Analog / Digital

Input Sync Signal Seperate H/V sync, Composite H/V, Sync-on-GreenLevel: TTL level

Maximum Pixel Clock rate 146 MHz

Active DisplayHorizontal/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 : 50F ~ 104F (10C ~ 40C)Operating Humidity : 10% ~ 80%Storage temperature : -13F ~ 113F (-25C ~ 45C)Storage Humidity : 5% ~ 95%

Note: Designs and specifications are subject to change without prior notice.

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2. Product specifications

2-2. Spec Comparison to the Old Models

ModelPebble

(2032BW/2032GW/2232BW/2232GW/2232GW Plus)

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/m 300cd/m

Contrast 1000:1 700:1

MagicBright 6 step 6 step

Pivot X X

Wall mount X X

FeatureMagic Color

Magic Bright3Magic Tune (Premium)

Magic Color Magic Bright3

Magic Tune(Premium)

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2. Product specifications

2-3. AccessoriesProduct Description Ccde. No Remark

Quick Setup Guide BH68-00376L

Samsung Electronics Service center

Warranty Card(Not available in all locations) BH68-00633A

Users Guide,Monitor Driver BN59-00585T

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

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2. Product specifications

Memo

4-1

4. Troubleshooting

4. Troubleshooting

4-1. TroubleshootingBefore 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 (Enter/Source) button for 5 seconds, the monitor automatically returns to factory reset.

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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.-

Major checkpoints

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.

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Diagnostics

Yes

Check function assy.Yes

Replace IP board.NoWhen Pin 4 of CN600 is 0V,

Does proper DC 14V appear at pin 5 of CN600?

When Pin 1 of IC 702 is DC 14V,Does proper DC5V appear at pin1 of

IC601

Check IC 701 and related circuit.

No

Yes

Check IC 601 and related circuit.

NoWhen pin 1 of IC 601 is DC 5V,Proper DC 3.3V appear at pin 3 of IC

601Yes

Check IC 602 and related circuit.

NoWhen 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.

Main Board Front

4-3

4. Troubleshooting

4-3. No Video (Analog)

Symptom -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 IP board.

Diagnostics

Yes

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Check signal cable connection and power.

Yes

Replace or check related circuit.

NoX1 oscillate proprely?

Is there R,G,B input atR111,R114 and R118?

Check input part.No

Yes

Is there Hsync, Vsync waveform at Pin 32,33 of IC200?

Check IC200 and related circuit.

No

Yes

Does the output signal appearat Pin 17~20, 22~27 of CN400?

Check CN400 and related circuit.

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Yes

There are DC 5V at Pin 1,2 and 3 of CN400?

NoCheck PANEL_EN SIGNAL

at R223 is High(On:High) and BL_EN signal at R601(ON:

Low) is Low

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Yes

Replace LCD Panel.

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

Main Board Front

4-4

4. Troubleshooting

4-3-1. Circuit diagrams and waveforms (Analog) when no screen is displayed on the monitor

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4. Troubleshooting

4-4. No Video (DVI)

Symptom - The LED power turns on but the screen is blank when the DVI cable is connected.

Majorcheckpoints

- Check the DVI 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 IP board.

Diagnostics

Yes

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Check signal cable connection and power.

Yes

Replace or check related circuit.

NoX1 oscillate properly?

Is there R, G, B input at R100,R101,R102,R106

and R108?

Check input part.No

Yes

Does the output signal appearat Pin 17~20, 22~27 of CN400?

Check IC400 and related circuit.

No

Yes

There are DC 5V at Pin 1,2 and 3 of CN400?

Check the PANEL_EN signal at R222 and BL_EN signal at

R603.

No

Yes

Replace LCD Panel.

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

Main Board Front

4-6

4. Troubleshooting

4-4-1. Circuit diagrams and waveforms (DVI) when no screen is displayed on the monitor

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4. Troubleshooting

4-5. Faults and Corrective ActionsFault Photo Symptoms and Corrective Actions Remarks

Symptoms: DVI signals are not recognized.

Causes: This fault occurs when the PC does not recognize the mode information because the DVI DDC has not been input to the monitor.

Corrective Actions: Input the DVI DDC to the monitor.

* Refer to the Training Manual for information on inputting the DVI DDC.

Symptoms: When the monitor is turned on, only a full white pattern is displayed continually regardless of the signals.

Causes: This fault occurs when only the lamp power is supplied and no video signals are input to the panel due to a fault or incorrect connections of the LVDS cable.

Corrective Actions: Replace or reconnect the LVDS cable correctly so that video signals can be supplied to the panel.

* A full white pattern is a feature of the TN panel and is displayed when no video signals are supplied.

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4. Troubleshooting

4-6. Adjustment

4-6-1. Service Adjustment ConditionsPrecautions before starting Service Adjustments 1) Check whether the adjustment devices are working correctly. 2) Ensure a sufficient work space for disassembling the monitor. 3) Prepare a soft support for disassembling the monitor.

Entering Service Mode

Entering: Menu Brightness 0 Contrast 0 Hold down the Enter button for five seconds

Exiting: Power OFF Power ON

Basic Service Items to perform after Replacing a Board 1) Check the state of the PC color adjustment. 2) Enter the DDC data. (Enter both analog and digital data.) 3) Check whether the MCU code that corresponds to the model has been entered. 4) After completing your work in service mode, reset the monitor and switch it off.

How to execute DDC 1) Enter the DDC EDID data when the AD board is replaced. 2) Download the DDC input program and the DDC file that corresponds to the model from the Quality Department of

Samsung and install it using a jig as shown in the figure below, and then enter the data.

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MTI-2031DDC

Parallel Connector

(25P Cable)Connect Monitor(Signal Cable)

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4. Troubleshooting

4-6-2. Service Function Spec.

Service Mode (Entering)1. Set both the brightness and contrast to 0.2. Hold down the (Enter, Source) button for five (5) seconds.3. The SVC Function OSD will appear.- To exit the SVC Function OSD, you have to turn off the power.

The SVC Function OSD consists of a 29 (width) X 12 (height) grid.The SVC Function OSD shows the information, software version and Micom checksum.

Service Mode (Moving around)1. Each time the + button is pressed, menu is selected. Then, you can adjust sub menu with - button

Panel Information

MCU Version

Checksum

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4. Troubleshooting

Service Mode (Replacing the Panel)- When replacing the panel

After replacing the panel, select the Panel item and then hold down the Menu button for five (5) seconds. The Ch. No. of the panel will increase by one (1) and the time information will change to 0.

Service Mode (Hot plug Menu)

- HDCP Hotplug : used when HDCP Video contents are not displayed. In case that monitor is connected to some bad device which does not comply with standard.

- HotPlug Time : If Hotplug is turn on, when monitor power off/on or changing to the DVI, hotplug pin goes to the low. This function controls this time duration. Though Hotplug is turn on monitor cant displayed, adjust this time duration

- Default is 9(means 0.9 sec), can control 5 to 50.

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4. Troubleshooting

How to execute DDC

1) Click the Open icon 2) Select Two EDID 3) Select a DDC file. 4) Select week 5) Click Next (OK).

6) Enter the serial number and press the Enter key.After entering the analog data, repeat the procedure above 2 to 5 times to enter digital data.

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4. Troubleshooting

How to Execute MCU Code

1) Options Checking. -. Manufacture : MSTAR -. Device Type:TSUM16_ROM128K_ext_flash -. Communication Port: DSUB15 (Analog) -. External Memory: PMC25LV010E

2) After click the LoadFile button , choose MCU code.

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4. Troubleshooting

3) Auto Program button choice.

4) After the Program and Verify completed, execute hard power off/on.

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4. Troubleshooting

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