Samsung LN-S3292D Schematic

SERVICE

Manual

TFT-LCD TV

Fashion Feature

LCD-TV

Chassis

GMO32MU GMO40KU GMO46KU GMO46KU

Model

LN-S3292D LN-S4092D

LN-S4692D LN46M52BD

- RF, 2HDMI, PC(Analog), Component, Video, S-Video, Digital TV

- Brightness : 500cd/

- Contrast ratio : 3000 : 1

- Respense time : 32" - 8ms, 40"/46" - 16ms

- Dynamic contrast

- PIP

photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of Samsung Electronics Co., Ltd.

GMO32MU / GMO40KU / GMO46KU Service Manual

First edition April 2006. Printed in Korea.

Trademarks

Samsung is the registered trademark of Samsung Electronics Co., Ltd.

GMO32MU / GMO40KU / GMO46KU and MacMaster Cable Adapter are trademarks of Samsung Electronics Co., Ltd.

Macintosh, Power Macintosh are trademarks of Apple Computer, Inc.

All other trademarks are the property of their respective owners.

1 Precautions 1-1

1-1 Safety Precautions

1-1

1-2 Servicing Precautions

1-2

1-3 Electrostatically Sensitive Devices (ESD) Precautions

1-2

1-4 Installation Precautions

1-3

2 Product specifications

2-1

2-1 Fashion Feature

2-1

2-2 Specifications

2-2

2-3 Option Specification

2-6

3 Alignments and Adjustments

3-1

3-1 General Alignment Instuction

3-1

3-2 Factory Mode Adjustments

3-2

3-3 White Balance - Calibration

3-9

3-4 White Ratio (Balance) Adjustment

3-10

3-5 Servicing Information

3-11

4 Troubleshooting

4-1

4-1 No Power

4-1

4-2 No Video (Analog PC Signal)

4-2

4-3 No Video (HDMI - Digital Signal))

4-4

4-4 No Picture (Tuner_CVBS)

4-6

4-5 No Picture (Tuner DTV TS)

4-8

4-6 No Picture (Video CVBS)

4-10

4-7 No Picture(S-Video Y/C)

4-11

4-8 No Picture(Component1, 2 : 480i, 480p, 720p, 1080i [ Y, Pb, Pr] )

4-13

4-9 No Sound

4-15

5 Exploded View and Parts List

5-1

5-1 LN-S3292D Exploded View

5-1

5-2 LN-S3292D Parts list

5-2

5-3 LN-S4092D Exploded View

5-3

5-4 LN-S4092D Parts list

5-4

5-5 LN-S4692D Parts list

5-5

5-6 LN-S4692D / LN46M52BD Parts list

5-6

6 Electrical Parts List

6-1

6-1 LNS3292D Parts List

6-1

6-2 LNS4092D Parts List

6-27

6-3 LNS4692D / LN46M52BD Parts List

6-55

Contents

7 Block Diagram 7-1 8 Wiring Diagram

8-1

8-1 Wiring Diagram

8-1

9 Schematic Diagrams

9-1

10 Operating Instructions and Installation

10-1

10-1 Front

10-1

10-2 Connection Panel

10-2

10-3 Remote Control

10-4

11 Disassembly and Reassembly

11-1

11-1 Disassembly

11-1

11-2 Reassembly

11-3

12 Schematic Diagram

12-1

12-1 Main PCB Layout

12-1

12-2 LN-S3292D Power

12-2

12-2 LN-S4092D Power

12-3

12-2 LN-S4692D / LN46M52BD Power

12-4

13 Circuit Descriptions

13-1

13-1 Block description

13-1

14 Reference Infomation

14-1

14-1 Technical Terms

14-1

14-2 Pin Assignments

14-4

14-3 Timing Chart

14-6

14-4 Panel Description

14-10

Contents

Samsung Electronics Co.,Ltd.

416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Gyeonggi-Do, Korea, 443-742 Printed in Korea P/N : BN82-00146A-01 URL : http://itself.sec.samsung.co.kr/

-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.

1 Precautions

1-1

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

Ser vicing 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).

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 Precautions

Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock.

1-1 Safety Precautions

1 Precautions

1-2

1-2-1 General Ser vicing

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.

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.

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 the blades 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.

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.

1-3

Electrostatically Sensitive Devices (ESD) 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.

1-2 Ser vicing 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 Precautions

1-3

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 Precautions

1-4

Memo

2 Product Specifications

2-1

2 Product Specifications

2-1 Fashion Feature

- RF, 2HDMI, PC(Analog), Component, Video, S-Video, Digital TV

- Brightness : 500cd/

- Contrast ratio : 3000 : 1

- Respense time : 32" - 8ms, 40"/46" - 16ms

- Dynamic contrast

- PIP

2 Product Specifications

2-2

2-2 Specifications

2-2-1 LN-S3292D Specifications

LCD Panel

TFT-LCD panel, RGB vertical stripe, normaly white, 32-Inch viewable, 0.1460 (H) x 0.4365(V)mm pixel pitch

Scanning Frequency Horizontal : 30 kHz ~ 61 kHz (Automatic)

Vertical : 60 Hz ~ 75 Hz (Automatic) Display Colors 16.7 Million colors Maximum Resolution Horizontal : 1360 Pixels

Vertical : 768 Pixels

Input Video Signal Analog 0.7 Vp-p

5% positive at 75 , internally terminated

Input Sync Signal Type : Seperate H/V

Level : TTL level

Maximum Pixel Clock rate

80 MHz

Active Display Horizontal/Vertical

AC power voltage & Frequency

AC 110, 60Hz Power Consumption < 150 W ( < 1W, stand by ) Dimensions(W x D x H)

Set 804 X 131.1 X 563.1 mm_without stand

804 X 249 X 622.5 mm_ with stand Weight

Set(With stand) 19.2 Kg

Environmental Considerations

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

Operating Humidity : 10 % ~ 80 %

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

Storage Humidity : 5 % ~ 95 %

TV System

Antena Input

- MAX Internal speaker Out : Right => 10W, Left => 10W

Sound Characteristic

- 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

System ATSC, NTSC

Item

Description

596.256 mm / 335.232 mm

Tunning Frequency Synthesize

Sound MONO, STEREO, SAP

2 Product Specifications

2-3

2-2-2 LN-S4092D Specifications

LCD Panel

TFT-LCD panel, RGB vertical stripe, normaly white, 40-Inch viewable, 0.648 (H) x 0.648(V)mm pixel pitch

Scanning Frequency Horizontal : 30 kHz ~ 61 kHz (Automatic)

Vertical : 60 Hz ~ 75 Hz (Automatic) Display Colors 16.7 Million colors Maximum Resolution Horizontal : 1360 Pixels

Vertical : 768 Pixels

Input Video Signal Analog 0.7 Vp-p

5% positive at 75 , internally terminated

Input Sync Signal Type : Seperate H/V

Level : TTL level

Maximum Pixel Clock rate

80 MHz

Active Display Horizontal/Vertical

AC power voltage & Frequency

AC 110~120 ,60Hz Power Consumption < 240 W ( < 1W, stand by ) Dimensions(W x D x H)

Set 1004 X 115 X 680 mm_without stand

1004 X 330 X 749 mm_ with stand Weight

Set(With stand) 27.5 Kg

Environmental Considerations

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

Operating Humidity : 10 % ~ 80 %

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

Storage Humidity : 5 % ~ 95 %

TV System

Antena Input

- MAX Internal speaker Out : Right => 10W, Left => 10W

Sound Characteristic

- 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

System ATSC, NTSC

Item

Description

885.168 mm / 497.664 mm

Tunning Frequency Synthesize

Sound MONO, STEREO, SAP

2 Product Specifications

2-4

2-2-3 LN-S4692D / LN46M52BD Specifications

LCD Panel

TFT-LCD panel, RGB vertical stripe, normaly white, 46-Inch viewable, 0.7455 (H) x 0.2495(V)mm pixel pitch

Scanning Frequency Horizontal : 30 kHz ~ 61 kHz (Automatic)

Vertical : 60 Hz ~ 75 Hz (Automatic) Display Colors 16.7 Million colors Maximum Resolution Horizontal : 1360 Pixels

Vertical : 768 Pixels

Input Video Signal Analog 0.7 Vp-p

5% positive at 75 internally terminated

Input Sync Signal Type : Seperate H/V

Level : TTL level

Maximum Pixel Clock rate

80 MHz

Active Display Horizontal/Vertical 1018.353 mm / 572.544 mm

AC power voltage & Frequency

AC 110V~120V, 60Hz Power Consumption < 330W (< 1W, stand by ) Dimensions(W x D x H)

Set 1126 X 140 X 752 mm_without stand

800 X252 X 603 mm) With stand

Weight Set(With stand) 37.0 kg

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

Operating Humidity : 10 % ~ 80 %

Storage Temperature : -4

F ~ 113

F (-20 C ~ 45 C)

Storage Humidity : 5 % ~ 95 %

TV System

Antena Input

- MAX Internal speaker Out : Right => 10W, Left => 10W

Sound Characteristic

- 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

System ATSC, NTSC

Item

Description

Tunning Frequency Synthesize

Sound MONO, STEREO, SAP

2 Product Specifications

2-5

2-2-4 Spec Comparison

LN-S3292D / LN-S4092D / LN-S4692D

2 Product Specifications

2-6

Item Item Name

Remote Control &

Batteries (AAA x 2)

Power Cord

Cover-Bottom

Stand

Stand Screw (4 ea)

Owner's Instructions

Cleaning Cloth

Warranty Card /

Registration

Card /Safety Guide Manual

(Not available in all locations)

32" : BN59-00511A &

4301-000121

40"/46" : BN59-00511A

32" : 3903-000144

40"/46" : 3903-000144

32" : BN63-01947A

40"/46" : BN63-01938A

32" : BN90-00828B

40"/46" : BN90-00821B

32" : 6002-001294

40"/46" : 6002-001294

32" : BN68-01001D

40"/46" : BN68-01001B

32" : BN63-01798A

40"/46" : BN63-07198A

BN68-00860A

Code.No Remark

2-3 Option Specification

3 Alignments and Adjustments

3-1

3 Alignments and Adjustments

3-1 General Alignment Instuction

1. Usually, a color LCD-TV needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync.

2. Use the specified test equipment or its equivalent.

3. Correct impedance matching is essential.

4. Avoid overload. Excessive signal from a sweep generator might overload the front-end of the TV. When inserting signal markers, do not allow the marker generator to distort test result.

5. Connect the TV only to an AC power source with voltage and frequency as specified on the backcover nameplate.

6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts.

7. To protect aganist shock hazard, use an isolation transform.

3 Alignments and Adjustments

3-2

3-2 Factory Mode Adjustments

3-2-1 Entering Factory Mode

To enter 'Service Mode' Press the remote -control keys in this sequence :

- If you do not have Factory remote - control

3-2-2 How to Access Service Mode

¡áUsing the Customer Remote

1.Turn the power off and set to stand-by mode

2.Press the remote buttons in this order; POWER OFF-MUTE-1-8-2-POWER ON to turn the set on.

3.The set turns on and enters service mode.

4.Press the Power button to exit and store data in memory. ¡ØIf you fail to enter service mode, repeat steps 1 and 2 above.

5.Initial SERVICE MODE DISPLAY State

Power OFF 1 8 2 Power OnMUTE

3-2-3 Factory Data

3 Alignments and Adjustments

3-3

3 Alignments and Adjustments

3-4

3 Alignments and Adjustments

3-5

3 Alignments and Adjustments

3-6

3 Alignments and Adjustments

3-7

AV/ S-VI DEO Cal i brat i on Checksum Option Byte KS1406 Whi t e Ba l ance KS1409 W/BMovi e Dynamic Contrast SVP-PX EEPROMAccess Count LBE RESET SOUND(STV8 2 5 X) Sub MicomDownl oad

T-BORDNUS0-0064 Dec 27 2005

T-BORDNUS5-0053 [ Sec : 47

]

AGC_REF[AIR] 0x50 PACKET_ERR_ THR 0x8 CR_F_GAIN[AIR] 0xD0B CR_L_GAIN[AIR] 0x24 EQ_STEP[AIR] 0xB PILOT_GAIN[AIR] 0x1612 AGC_REF[CABLE] 0x50 CR_F_GAIN[CABLE] 0xD0B CR_L_GAIN[CABLE] 0x24 EQ_STEP[CABLE] 0xB PILOT_GAIN[CABLE] 0x1 CR_F2_GAIN[CABLE] 0x1612

AV/ S-VI DEO Cal i br at i on Checksum Option Byte KS1406 Whi t e Bal anc e KS1409 W/B Movi e Dynamic Contrast SVP-PX EEPROMAccess Count LBE RESET SOUND(STV8 2 5 X) Sub MicomDownl oad

T-BORDNUS0-0064 Dec 27 2005

T-BORDNUS5-0053 [ Sec : 47

]

Dynamic CE On Dynamic Dimming On LBE Y_MEAN READ

3 Alignments and Adjustments

3-8

3 Alignments and Adjustments

3-9

3-3 White Balance - Calibr ation

3-3-2 White Balance - Adjustment

3-3-1 White Balance -Calibration

3-3-3 Conditions for Measurement

1. Calibration

DTV Calibration PC Calibration (Calibration Condition refer to next page)

3. W/B

(low light) (hight light)

1. On the basis of toshiba ABL pattern : High Light level (57 IRE)

- INPUT SIGNAL GENERATOR : MSPG-925LTH * Mode NO 1 : 744X484@60 Hz

NO 6 : 1280X720@60 Hz (Component 720P) NO 21 : 1024X768@60 Hz

Pattern

NO 15 : Color bar NO 16 : Toshiba ABL Pattern NO 17 : 16 gray

2. Optical measuring device : CA210 (FL) Please use the MSPG-925 LTH generator for model LN-S4092D, LN-S4692D, LN46M52BD.

(W/B adjustment Condition refer next page)

Sub Bright Sub Contrast R offset R gain G offset G gain B offset B gain

3 Alignments and Adjustments

3-10

3-4 White Ratio (Balance) Adjustment

1. You can adjust the white ratio in factory mode (1:Calibration, 3:White-Balance).

2. Since the adjustment value and the data value vary depending on the input source, you have to adjust these in CVBS, Component 1 and HDMI 1 modes.

3. The optimal values for each mode are configured by default. (Refer to Table 1, 2.)

It varies with Panel's size and Specification.

- Equipment : CS-1000

- Pattern: Master MSPG925 #16 "ABL Pattern" as standard

- Use other equipment only after comparing the result with that of the Master equipment.

- Set Aging time : 30min

- Calibration and Manual setting for WB adjustment. HDMI: No Calibration Manual adjustment at #16 pattern (720p) COMP: Calibration at #24 Chessboard Pattern Manual adjustment at #16 pattern (720p) CVBS: Calibration at #24 Chessboard Pattern Manual adjustment at #16 pattern (NTSC) PC : Calibration at #24 Chessboard Pattern No Manual adjustment (1024x768@60Hz)

CVBS

L/L

H/L

L/L

H/L

L/L

T(K) + MPCD

Y (cd/m

)

3.8(1.1Ft)

4.2(1.2Ft)

263

Adjustment Coordinate

263

15000K/0

Component

(720p)

HDMI

(1080i)

-White Balance Manual Adjustment (ABL Pattern)

-Adjustment Specification White Balance : High light ( 2), Low light ( 3) Luminance : High light (Don't care), Low light ( 0.2 Ft/L)

20mm

3 Alignments and Adjustments

3-11

3-5 Ser vicing Infor mation

3-5-1 USB Download Method

1. Downloading boot code Change the boot code's file name into "boot.bin". Copy the "boot.bin" into the path "/bordeaux/us" in USB flash driver. Turn off LCD TV. Insert the USB flash driver into the service 1 jack of LCD TV. Turn on LCD TV. The banner osd "Updating SW..." is displayed. The banner osd "Completed..." is displayed when the updating is completed. Turn off and remove the USB flash driver from LCD TV Check the program version.

2. Downloading application code Change the application code's file name into "appl.rom". Copy the "appl.rom" into the path "/bordeaux/us" in USB flash driver. Turn off LCD TV. Insert the USB flash driver into the service 1 jack of LCD TV. Turn on LCD TV. The banner osd "Updating SW..." is displayed. The banner osd "Completed..." is displayed when the updating is completed. Turn off and remove the USB flash driver from LCD TV Check the program version.

3 Alignments and Adjustments

3-12

Memo

4 Troubleshooting

4-1

4 Troubleshooting

4-1 No Power

Does proper Stand-By DC A6.2V

appear at C156 ?

Change the Main Power Ass'y

32" : BN96-03057A 40" : BN63-01649A 46" : BN63-02062A

Yes

Check a connection power cable.

P/N: BN39-00691B

Does proper Main DC

B12V,B5V,B12VS appear at

C106, C115, C119?

Yes

Does proper Inverter DC 24V appear at CNM802,

CNM803 in SMPS?

Check IC106, IC107

Change the Main Ass'y

BN94-00850A

Yes

Does proper DC A5V,A3.3V

appear at C154, C151 ?

Check

IC101, IC102, IC103, IC104, IC105

Change the Main Ass'y BN94-00850A

Yes

Does proper DC

B9V,B8V,VCC5P,B3.3V_1,B3.3V_2,

B5V_VCC appear at C108, C110,

C123, C128, C135, C133 ?

Does proper DC 1.8V appear at

C1103, C1154, C364, C1011 ?

Does proper DC 2.5V appear at

C1214, C1746 ?

A power is supplied to set ?

Check a other function (No picture part)

Replace a LCD Panel

32": BN07-00324A 40" : BN07-00245A 46" : BN07-00282A

Check IC1101, IC1102, IC304, IC1001

Change the Main Ass'y BN94-00850A

Check IC1201, IC1702

Change the Main Ass'y BN94-00850A

LAMP Off, power indicator LED

red color ?

4 Troubleshooting

4-2

4-2 No Video (Analog PC Signal)

Check a PC source and check the connection of

DSUB?

Input a analog PC signal.

Check a connected cable.

Yes

Does the signal appear at

#30,#22,#38,#41,#42

(R,G,B,H,V) of IC901?

Check JA801, PC cable.

Change a PC cable. Change a main

PCB ass'y

Yes

Does the digital data appear at

output of R1034~7, R1039?

Check IC901

Change a main PCB ass'y

Yes

Does the digital data

appear at output of

R1010~5, R1024~7?

Check IC1002

Change a main PCB ass'y

Yes

Check a LVDS cable?

Replace a LCD panel?

Please, Call to Samsung Co. LTD

Yes

Power Indicator is off.

Lamp on, no video

4 Troubleshooting

4-3

WAVEFORMS

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