Samsung 2033HD Service Manual

LCD-Monitor

Chassis : LS20CFV

Model :

2033HD

SERVICE

Manual

TFT-LCD Monitor Contents

2033HD

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

1. Precautions

2. Product specications

3. Disassembly and Reassemble

4. Troubleshooting

5. Exploded View & Part List

6. Wiring Diagram

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

2-3. Accessories .................................................................................................................... 2-4

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

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

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

4-1. First Checklist for Troubleshooting ................................................................................ 4-1

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

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

4-4. No Video (Digital-HDMI) ................................................................................................. 4-7

4-5. No Picture (Tuner_CVBS) ............................................................................................ 4-10

4-6. No Picture (Tuner_DTV) ............................................................................................... 4-13

4-7. No Sound ...................................................................................................................... 4-16

4-8. Faults and Corrective Actions ....................................................................................... 4-19

4-9. Adjustment .................................................................................................................... 4-20

4-10. How to Access Service Mode ..................................................................................... 4-20

4-11. Service Adjustment .....................................................................................................4-21

4-12. Software Upgrade ....................................................................................................... 4-23

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

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

5-2. Parts ListService ............................................................................................................ 5-3

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

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

6-2. Wiring Diagram - MAIN Board ........................................................................................ 6-2

6-3. Wiring Diagram - IP Board .............................................................................................. 6-3

6-4. Connector Functions ...................................................................................................... 6-4

6-5. Cables ............................................................................................................................ 6-4

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: BN82-00707A-00

1-1

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).

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

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.

DEVICE UNDER TEST

(READING SHOULD) NOT BE ABOVE 0.5mA

LEAKAGE CURRENT TESTER

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

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 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.

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.

1-3

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.

1-4

1. Precautions

Memo

2-1

2. Product specications

2-1. Feature & Specications

Feature

Supreme Digital Interface & Networking

- With a built-in HD digital tuner, it supports HD broadcasting with no particular set-top box and provides simple access with a single remote control.

Excellent Picture Quality

Dynamic Contrast

- Automatically detects the input visual signal and adjusts to create optimum contrast.

DTV Tuner, HDMI, Stereo

Convenience

-The TV utilizes the HDMI system to implement perfect digital sound and picture quality.

�

Specications

Item Description

Model 2033HD

LCD Panel TFT-LCD Panel, RGB Vertical stripe, normally White,

20-Inch viewable, 0.2768 (H) x 0.2768 (V) mm Pixel Pitch

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

Vertical: 56 Hz ~ 75 Hz(Automatic)

Display Colors 16.7 Million colors

Maximum resolution

Horizontal : 1600 pixels

Vertical : 900 pixels

Input Signal Analog 0.7 Vp-p ±5% positive at 75Ω, internally terminated

Input Sync Signal Type : Seperate H/V

Level : TTL level

Maximum Pixel Clock rate 136.750 MHz

Active Display (Horizontal/Vertical)

442.8 (H) X 249.2 (V)

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

Power Consumption 51 W ＜ 2W

Dimensions Set (W x D x H)

487.8 X 323.8 X 70.5mm (Without Stand)

487.8 X 373.7 X 177.0mm (With Stand)

Weight Set

(After installation Stand)

Product : 5.0Kg / packing : 6.1Kg

TV System Tuning Frequency Synthesize

System PAL, NT443, SECAM

Sound MONO, STEREO, NICAM

2-2

2. Product specications

Specications

Item Description

Model 2033HD

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

Operating Humidity : 10% ~ 80%

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

Storage Humidity: 5% ~ 95%

Antenna Input 75Ω

Sound Characteristic -MAX Internal speaker Out : Right : 3W / Left : 3W

-BASS Control Range : -8 dB ~ + 8dB

-TREBLE Control Range : -8 dB ~ +8 dB

-Headphone Out : 10 mW MAX

-Output Frequency : RF : 80 Hz ~ 15 kHz A/V : 80 Hz ~ 20 kHz

2-3

2. Product specications

2-2. Spec Comparison to the Old Models

Model 2033HD 933HD

Design

Screen Size 20.1” 19”

Resolution 1600 X 900 60Hz 1360 x 768 60Hz

Brightness 300cd/m2 300cd/m2

Contrast Ratio 1000:1 1000:1

Response Time 5ms 5ms

Viewing Angle Left/Right/Up/Down : 85˚/85˚/80˚/80˚ Left/Right/Up/Down : 80˚/80˚/80˚/80˚

PC Input D-SUB, DVI D-SUB, DVI

Power Consumption 51W 58W

DPMS Less than 2W Less than 2W

Sound Output 3W x 2 3W x 2

DTV Resolution SD,HD(H.264 Support(France)) SD

UI Single UI Smart UI

Image Size : If the resolution is not wide resolution, this option allows the screen size to be selected as normal or wide.

2-4

2. Product specications

2-3. Accessories

Product Description Ccde. No Remark

Remote Control

Batteries (AAA x 2)

BN59-00865A

Samsung Electronics

Service center

Power Cord 3903-000085

Stand Body BN96-07605D

Stand Base BN96-07604A

D-Sub Cable BN39-00244G

User’s Guide,

Monitor Driver,

Natural Color Pro Software

BN59-00905A

Cleaning Cloth BN63-1798B

3-1

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. Remove the signal cable and the power cord before beginning the disassembly.

Description Photo Screws

1. Place monitor face down on cushioned table. Remove Stand, then remove 4 marked screws from the rear cover.

Caution : If you do not tilt the stand and use too

much force to remove it, the connection pin may break.

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

Caution : Remove the cover and the LCD panel

using the provided jig on both grooves at the bottom. If you disassemble the product with only one side opened, it may be damaged.

3-2

3. Disassembly and Assembly

Description Photo Screws

3. Insertaatscrewdriverintothegrooveandthen

lift up and remove the cover.

4. After remove COVER-REAR, then disconnect SPEAKER , FUNCTION wire.

5. Disconnect LVDS cable from panel.

3-3

3. Disassembly and Assembly

Description Photo Screws

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

7. Remove 4 screws of PC and DVI connector. Then, upset the shield.

8. Remove 7 marked SCREW of left picture. Disconnect IP board.

※ Reassembly procedures are in the reverse order

of disassembly procedures.

3-4

3. Disassembly and Assembly

Description Photo Screws

9. Remove the LCD panel.

10. Remove the WIRE-CONNECTOR from the LED PCB MODULE.

11. Remove the IR-PCB from the HOOK.

12. Remove the KNOB-CONTROL from the COVERFRONT.

13. Remove the FUNCTION PCB MODULE.

※ The assembly is in the reverse order of disassembly.

4-1

4. Troubleshooting

4-1. First Checklist for Troubleshooting

Check the various cable connections rst.

- Check to see if there is a burnt or damaged cable.

- Check to see if there is a disconnected cable connection or a connection is too loose.

- Check to see if the cables are connected according to the connection diagram.

Check the power input to the Main Board.

Check the following circuits.

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

• 55V develop but no screen: Main PBA

• 5V does not develop: I/P PBA

Check the voltage in and out between the IP↔ Main Board, between the IP↔ Panel, and between the Main LVDS Boards.

4-2

4. Troubleshooting

4-2. No Power

Symptom Though the power swtich on, the LED power off and the screen is blank.-

Major

checkpoints

Check Power cable.

Check whether the Lamp connector is connected correctly to the IP.

Check whether the power cable is connected correctly to the MAIN.

Check whether the Function cable is connected correctly to the MAIN.

Diagnostics

Main Board Front

Yes

LAMP off, power indicator

LED red color?

Check a connection a

power cable.

Yes

Does proper 5V appear

at BD1021.

Change a Assy PCB Power.

Yes

Does proper DC14.5V appear

at C1070?

Change a Assy PCB Power.

Yes

Does proper DC3.3V, 1.2v appear

at BD1014, C1105?

Check IC1004, IC1010.

Change a main PBA.

A power is supplied to set?

Check a other function.(No picture

part) Replace a lcd panel.

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

4-3

4. Troubleshooting

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

4-4

4. Troubleshooting

4-3. No Video (Analog PC)

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

Major

checkpoints

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

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

Main Board Front

R802 R803 R807

IC4010

RA4000,RA4001

Yes

Check a PC source and check

the connection of DSUB cable?

Input a analog PC signal and

connected cable(DPMS).

Yes

① Does the sigmal appear at

R802, R803, R807?

PC cable. Change a PC

cable. Change a main PCB ass’y.

Yes

Does the digital data appear at the

output of RA4000, RA4001?

Check IC4010.

Change a main PBA.

Check a LVDS cable?

Replace a lcd panel?

Please, Call to Samsung Co. LTD.

Yes

Power Indicator is off.

Lamp on, no video.

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

4-5

4. Troubleshooting

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

on the monitor

4-6

4. Troubleshooting

4-3-2. Waveforms when no screen is displayed (Analog PC)

①

R,G,B Output Signal of IC4010

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