Samsung FX2490HD Schematic

LCD-Monitor

Chassis : LS24F9DSM

Model : FX2490HD

Manual

SERVICE

TFT-LCD Monitor Contents

1. Precautions

2. Product specications

3. Disassembly and Reassemble

4. Troubleshooting

5. Exploded View & Part List

6. Wiring Diagram

FX2490HD

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

Contents

1. Precautions

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

4. Troubleshooting

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

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

4-3. PC (ANALOG) No Screen ............................................................................................ 4-7

4-4. DVI/HDMI No Screen ................................................................................................... 4-10

4-5. Faults and Corrective Actions ....................................................................................... 4-13

4-6. Adjustment .................................................................................................................... 4-14

4-7. How to Access Service Mode ....................................................................................... 4-14

4-8. White Balance - Calibration .......................................................................................... 4-16

4-9. White Ratio (Balance) Adjustment ................................................................................4-17

4-10. Servicing Information .................................................................................................. 4-18

4-11. Software Upgrade ....................................................................................................... 4-19

4-12. Micom Program Upgrade .......................................................................................... 4-20

5. Exploded View & Part List

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

5-2. Parts List ......................................................................................................................... 5-2

6. Wiring Diagram

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

6-2. Board Connection - Main Board ..................................................................................... 6-2

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

6-4. Cables ............................................................................................................................ 6-3

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: BN82-01109A-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.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 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

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 4.

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.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 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, 8.

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.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 3.

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 4.

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 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.

1. Precautions

Memo

1-4

2. Product specications

2-1. Feature & Specications

Feature

Supreme Digital Interface & Networking ሪ

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

Excellent Picture Quality ሪ

Dynamic Contrast ሪ

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

ATV Tuner, HDMI, Stereo, SRS Trusurround HD support ሪ

Convenience ሪ

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

2-1

2-2

2. Product specications

Specications

Item Description

LCD Panel TFT-LCD Panel, RGB Vertical stripe, normally White, 24.0-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 (Automatic)

Display Colors 16.7 Million colors

Maximum resolution

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

Input Sync Signal Type : Seperate H/V

Maximum Pixel Clock rate 148.5 MHz

Active Display (Horizontal/Vertical)

AC power voltage & Frequency

Power Consumption 35W <0.3W

Dimensions Set (W x D x H)

Weight Set

(After installation Stand)

TV System Tuning: Frequency Synthesize,

Environmental Considerations

Horizontal: 1920 pixels

Vertical: 1080 pixels

Level : TTL level

476.64(H) X 268.11(V)

AC 110 ~ 240V, 50 ~ 60 Hz

579.0 x 436.0 x 216.0 mm (with Stand)

579.0 x 363.0 x 36.5 mm (without Stand)

5.3 Kg (with Stand)

7.5 Kg (Package)

System: NT4.43 , PAL , SECAM , DVB-T/C

Sound: BG,DK,I,L,L’

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: 5W/ Left: 5W

- 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

Design

Screen Size 24” 24”

Resolution 1920X1080(FHD) 60Hz 1920X1080(FHD) 60Hz

Brightness 250cd/m

Contrast Ratio 1000:1 1000:1

Response Time 5ms 5ms

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

PC Input D-SUB, DVI(HDMI) D-SUB, DVI(HDMI)

90-MFM

FX2490HD

30-MFM

B2430HD

300cd/m2

Power Consumption 35W<0.3W 39W<0.3W

DPMS Less than 0.3W Less than 2W

Sound Output 5W x 2 3W x 2

Dynamic Contrast Ratio MEGA DCR:1 70000:1

Sound Effect

Dolby Digital Plus

Dolby Digital Pulse

DTS

SRS Theater sound

Dolby Digital Plus

Dolby Digital Pulse

DTS

SRS Theater sound

2-4

2. Product specications

2-3. Accessories

Product Description Code. No Remark

Remote Control

Batteries (AAA x 2)

Power Cord 3903-000525

Stand Base BN96-15180B

D-Sub Cable BN39-00244H

BN59-01012A

4301-000121

Samsung Electronics

Service center

User Manual BN59-01118A

Quick Setup Guide BN68-00226R

Warranty Card

(Not available in all locations)

Cleaning Cloth BN63-01798B

BN68-03169A

2-5

2. Product specications

Product Description Code. No Remark

Holder-Wire BN96-06529A

DC-Adapter BN44-00399A

Stereo Cable

SCART Gender BN39-01154F

Composite Video,Audio Gender BN39-01154H

Component Video Gender BN39-01154C

BN39-01286A

Samsung Electronics

Service center

2. Product specications

Memo

2-6

5. Exploded View & Part List

F001A

PANEL

CB07A

P002A

M0014

R001A

SB01A

RS01A

SB04A

5-1. LS24F9DSM/EN - Exploded View

5. Exploded View & Part List

5-1-1. Parts List

Location No. Code No. Description & Specication Q’ty SA/SNA Remark

CB07A BN96-15179A ASSY BRACKET P-PCB;90-MFM,SECC,T0.8 1 SNA

F001A BN96-15176E ASSY COVER P-FRONT;90-MFM,EUROPE,PC+PC V 1 SA

M0014 BN94-03900C ASSY PCB MAIN;LS24F9DSM/EN 1 SA

P002A BN44-00396A AC VSS-LED DRIVER;90Series 24"(LED drive 1 SA

PANEL BN07-00794A LCD-PANEL;M240HW01 V6,AU24016,6bit Hi-FR 1 SA

R001A BN96-15182A ASSY COVER P-REAR;90-MFM,EUROPE,PC+ABS,V 1 SA

RS01A BN96-15178A ASSY COVER P-REAR SUB;90-MFM,USA,PC+ABS, 1 SA

SB01A BN96-15861B ASSY STAND P-BODY;90-MFM,PC+ABS,V0,BR002 1 SA

SB04A BN96-15180B ASSY STAND P-BASE;90-MFM,EUROPE,PC+ABS,V 1 SA

BN96-15862A ASSY BRACKET P-AV;90-MFM,PCM 0.35,BLK 1 SNA

5-1

5-2

5. Exploded View & Part List

5-2. LS24F9DSM/EN - Parts List

Service Bom (SA: SERVICE AVAILABLE, SNA: SERVICE NOT AVAILABLE)

Level Location No. Code No. Description & Specication Q’ty SA/SNA Remark

0.1 AA01-00004A FOIL;2000,2000,NTR,SEH 1 SNA

0.1 T0603 AA69-00926C PALLET;,WOOD,1100MM,1300MM,120MM,7KG,TIN 1 SNA

0.1 T0077 BH68-00329D LABEL BAR CODE-02;NO CE,NO WT`Y,MPRII,LA 1 SNA

0.1 T0527 BH68-40364A LABEL-SUMMARY;G52,G72,ART,100G,WHT,BLK,W 1 SNA

0.1 PANEL BN07-00794A LCD-PANEL;M240HW01 V6,AU24016,6bit Hi-FR 1 SA

0.1 EC29 BN39-00244H CBF SIGNAL-D-SUB TO D-SUB;D-sub cable,15 1 SA

0.1 P002A BN44-00396A AC VSS-LED DRIVER;90Series 24"(LED drive 1 SA

0.1 P001A BN44-00399A DC VSS(A);AD-6314C,90SERIES MFM,110/230V 1 SA

0.1 T0527 BN68-00129A LABEL SHIPPING-00;LABEL SHIPPING,ART-PAP 1 SNA

0.1 CCM1 BN68-01570A LABEL RATING;ALL,SS,PE,T0.05,90,45,Dark 1 SNA

0.1 BN69-02114A PAD PACKING-EDGE;CB,B800,W200,L2200,YEL, 1 SNA

0.1 BN69-03934A WRAP STRETCH FILM;All,HDPE,0.012,500,300 1 SNA

0.1 BN81-02321A BAG-AIR;LIGHT FLEX PLASTIK,PE WHITE,L120 1 SNA

0.1 M0014 BN94-03900C ASSY PCB MAIN;LS24F9DSM/EN 1 SA

..2 0202-001557 SOLDER-CREAM;LST57-A,D38-63,42SN/57BI/1A 3 SNA

..2 0202-001608 SOLDER-WIRE FLUX;LFC7-107,D0.8,99.3Sn/0. 0.25 SNA

..2 3701-001698 CONNECTOR-DSUB;15P,3ROW,FEMALE,ANGLE,NI 1 SA

..2 HB01A 3711-000058 HEADER-BOARD TO CABLE;BOX,4P,1R,2.5MM,AN 1 SA

..2 CN906 3711-004105 CONNECTOR-HEADER;BOX,8P,1R,2.5mm,ANGLE,S 1 SA

..2 DRVCN1 3711-004379 HEADER-BOARD TO CABLE;BOX,4P,1R,2mm,STRA 1 SA

..2 3722-003128 JACK-DC POWER;4P,6.7PI,SN,BLK 1 SNA

..2 ET01 BN40-00196A TUNER;DTOS40FVH082A,DTOS40FVH082A,DVB-T/ 1 SA

..2 BN97-04732C ASSY SMD;LS24F9DSM/EN,BN94-03900C 1 SNA

...3 0202-001477 SOLDER-CREAM;LST309-M,D20~45um,96.5Sn/3A 4.854 SNA

...3 DS01A 0401-001056 DIODE-SWITCHING;MMBD4148SE,100V,200mA,SO 12 SA

...3 0403-001180 DIODE-ZENER;BZX84C6V2,5.8-6.6V,350mW,SOT 1 SA

...3 0403-001783 DIODE-ZENER;BZB84-C6V2,5.8/6.6V,300mW,SO 16 SNA

...3 D0254 0404-001404 DIODE-SCHOTTKY;BAT721C,40V,200mA,SOT-23, 1 SA

...3 T0139 0406-001200 DIODE-TVS;RCLAMP0504F,6/-/-V,150W,SC-70 1 SA

...3 T0139 0406-001271 DIODE-TVS;RCLAMP0524P,6/-/-V,150W,SLP251 4 SNA

...3 SD3 0407-000114 DIODE-SWITCHING;KDS184,80V,100mA,SOT-23, 2 SNA

...3 KQ1 0501-000279 TR-SMALL SIGNAL;KSA1182-Y,PNP,150mW,SOT- 1 SA

...3 Q101 0501-000445 TR-SMALL SIGNAL;KTC3875S-Y,NPN,150mW,SOT 9 SA

...3 PQ02 0501-002080 TR-SMALL SIGNAL;2SC2412K,NPN,200mW,SC-59 2 SA

...3 CEQ2 0505-000110 FET-SILICON;2N7002,N,60V,115mA,7.5ohm,0. 2 SA

...3 0505-001844 FET-SILICON;SI4435DDY-T1-GE3,P,-30V,-11. 3 SA

...3 M0215 0801-002198 IC-CMOS LOGIC;74LVC14,INVERTER,SOP,14P,1 1 SA

...3 IC104 0801-002630 IC-CMOS LOGIC;74AHCT1G08,2-INPUT AND GAT 1 SA

...3 IC104 0801-003330 IC-CMOS LOGIC;Octal buffer,DQFN,20P,4.5x 2 SA

...3 IC104 0802-001012 IC-CMOS LOGIC;74LCX245,TRANSCEIVER,DQFN, 1 SNA

...3 1006-001266 IC-LINE TRANSCEIVER;3232,TSSOP,16P,174MI 1 SA

...3 1006-001474 IC-LINE DRIVER;DRV604PWP,HPSSOP,28P,9.8x 1 SA

...3 IC112 1103-000129 IC-EEPROM;24C02,2Kbit,256x8,SOP,8P,5x4mm 2 SA

...3 IC112 1103-001310 IC-EEPROM;24LC02B,256X8BIT,SOIC,8P,3.91X 2 SA

...3 1103-001487 IC-EEPROM;AT24C256C-SSHL-T,256Kbit,32Kx8 1 SA

...3 1105-002153 IC-DDR2 SDRAM;K4T1G164QF-BCF8,DDR2,1Gbit 2 SNA

...3 1201-002994 IC-POWER AMP;NTP-7300S,QFN,56P,8x8mm,DUA 1 SA

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