Samsung GSM40SE, GSM37SE, GSM32SE, GSM27SE, LE40S71B Service Manual

TFT-LCD TV

Chassis GSM27SE

GSM32SE

GSM37SE

GSM40SE

Model LE27S71B

LE32S71B

LE37S71B

LE40S71B

SERVICE Manual

TFT-LCD TV		Fashion Feature
		- Luxurious Slim Design
		- Supreme Picture Quality
		- Supreme Sound Quality
		- Supreme Convenience Quality
		- Convenience for Users

-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.

Samsung Electronics Co.,Ltd.

416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Gyeonggi-Do, Korea, 443-742

Printed in Korea

P/N : BN82-00139J-00

URL : http://itself.sec.samsung.co.kr/

1 Precautions

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

1-1-1 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 resistor-capacitor 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

1-1-4 Product Safety Notices

Some electrical and mechanical parts have special safety-related 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 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.

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 Fashion 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

-DNIe technology provides life-like clear images.

Dynamic Contrast

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

SRS TruSurround XT

-SRS TruSurround XT provides a virtual Dolby surround system.

Convenience

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

2-1

2 Product Specifications

2-2 LE27S71B Specifications

Item			Description
LCD Panel	LCDPanel:TFT-LCDPanel,RGBVerticalstripe,normalyblack,27-Inchviewable,0.1455(H)*0.4365(V)mmPixelPitch
Scanning Frequency	Horizontal :	30 kHz ~ 61 kHz (Automatic) / Vertical : 60 Hz ~ 75 Hz (Automatic)
Display Colors	16.7M colors
Maximum Resolution	Horizontal : 1360 Pixels
	Vertical	: 768 Pixels
Input Video 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	80 MHz
Active Display
Horizontal/Vertical	596.3 mm / 335.2 mm
AC power voltage & Frequency	AC 220 ~ 240 V, 60/50 Hz
Power Consumption	100 W 1W
Dimensions(W x D x H)
Set	769 x 226 x 526 mm(30.27 x 8.89 x 20.70 inches) After installation Stand
	769 x 79 x 471 mm(30.27 x 3.11 x 18.54 inches) Without stand
Weight
Set(After installation Stand)	10.4 kg (22.9 lbs)
TV System	Tunning		Frequency Synthesize
	System		PAL, SECEM
	Sound		MONO, STEREO, NICAM
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 %
Antena Input	75Ω
	-MAX Internal speaker Out : Right : 5W / Left : 5W
	-BASS Control Range : -8 dB ~ + 8dB
Sound Characteristic	-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

2-2

			2 Product Specifications
2-3 LE32S71B Specifications
Item			Description
LCD Panel	TFT-LCD panel, RGB vertical stripe, normaly white, 32-Inch viewable, 0.511 (H) x 0.511 (V) mm pixel pitchh
Scanning Frequency	Horizontal : 30 kHz ~ 61 kHz (Automatic) / Vertical : 60 Hz ~ 75 Hz (Automatic)
Display Colors	16,777,216 colors
Maximum Resolution	Horizontal : 1360 Pixels
	Vertical	: 768 Pixels
Input Video 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	80 MHz
Active Display
Horizontal/Vertical	556.4 mm / 339.8 mm
AC power voltage & Frequency	AC 220 ~ 240V, 50 ~ 60 Hz
Power Consumption	152 W 1W
Dimensions(W x D x H)
Set	892.5 x 249 x 615 mm(35.13 x 9.8 x 24.21 inches)After installation Stand
	892.5 x 82 x 544 mm(35.13 x 3.22 x 21.41 inches) Without stand
Weight
Set(After installation Stand)	13.9 kg (30.6 lbs)
TV System	Tunning		Frequency Synthesize
	System		PAL, SECEM
	Sound		MONO, STEREO, NICAM
Environmental	Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)
Considerations	Operating Humidity : 10 % ~ 80 %
	Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)
	Storage Humidity : 5 % ~ 95 %
Antena Input	75Ω
	-MAX Internal speaker Out : Right : 5W / Left : 5W
	-BASS Control Range : -8 dB ~ + 8dB
Sound Characteristic	-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 Specifications

2-4 LE37S71B Specifications

Item			Description
LCD Panel	TFT-LCD panel, RGB vertical stripe, normaly white, 37-Inch viewable, 0.511 (H) x 0.511 (V) mm pixel pitchh
Scanning Frequency	Horizontal :	30 kHz ~ 61 kHz (Automatic) / Vertical : 60 Hz ~ 75 Hz (Automatic)
Display Colors	16,777,216 colours
Maximum Resolution	Horizontal : 1360 Pixels
	Vertical	: 768 Pixels
Input Video 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	80 MHz
Active Display
Horizontal/Vertical	556.4 mm / 339.8 mm
AC power voltage & Frequency	AC 220 ~ 240V, 50 ~ 60 Hz
Power Consumption	170 W 1W
Dimensions(W x D x H)
Set	800 x 252 x 602.5 mm(31.5 x 9.92 x 23.72 inches)After installation Stand
	800 x 79.6 x 564 mm(31.5 x 3.13 x 22.20 inches) Without stand
Weight
Set(After installation Stand)	14.8 kg (32.6 lbs)
TV System	Tunning		Frequency Synthesize
	System		PAL, SECEM
	Sound		MONO, STEREO, NICAM
Environmental	Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)
Considerations	Operating Humidity : 10 % ~ 80 %
	Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)
	Storage Humidity : 5 % ~ 95 %
Antena Input	75Ω
	-MAX Internal speaker Out : Right : 10W / Left : 10W
	-BASS Control Range : -8 dB ~ + 8dB
Sound Characteristic	-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

2-4

			2 Product Specifications
2-5 LE40S71B Specifications
Item			Description
LCD Panel	TFT-LCD panel, RGB vertical stripe, normaly white, 40-Inch viewable, 0.648(H) x 0.216(V) mm pixel pitch
Scanning Frequency	Horizontal : 30 kHz ~ 61 kHz (Automatic) / Vertical : 60 Hz ~ 75 Hz (Automatic)
Display Colors	16,777,216 colors
Maximum Resolution	Horizontal : 1360 Pixels
	Vertical	: 768 Pixels
Input Video 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	80 MHz
Active Display
Horizontal/Vertical	556.4 mm / 339.8 mm
AC power voltage & Frequency	AC 220 ~ 240V, 50 ~ 60 Hz
Power Consumption	205 W 1W
Dimensions(W x D x H)
Set	1100.5 x 330 x 732.5 mm(43.32 x 12.99 x 28.83 inches) After installation Stand
	1100.5 x 95 x 661 mm(43.32 x 3.74 x 26.02 inches) Without stand
Weight
Set(After installation Stand)	23.7 kg (52.2 lbs)
TV System	Tunning		Frequency Synthesize
	System		PAL, SECEM
	Sound		MONO, STEREO, NICAM
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 %
Antena Input	75Ω
	-MAX Internal speaker Out : Right : 10W / Left : 10W
	-BASS Control Range : -8 dB ~ + 8dB
Sound Characteristic	-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

2-5

2 Product Specifications

2-6 Spec Comparison

Model		LE26R51B / LE32R51B / LE40R51B			LE27S71B / LE32S71B /
					LE37S71B / LE40S71B
Design
Frequency
Horizontal		30 ~ 61 kHz			30 ~ 61 kHz
Vertical		60 ~ 75 Hz			60 ~ 75 Hz
Display Color		16,777,216 colors			16,777,216 colors
PC Resolution
Maximum mode		WXGA, 1360 x 768 @ 60 Hz			WXGA, 1360 x 768 @ 60 Hz
Input Signal
Sync Signal		H/V Separate, TTL, P. or N.			H/V Separate, TTL, P. or N.
Video Signal		0.7 Vp-p @ 75ohm			0.7 Vp-p @ 75ohm
Power
Consumption		140W / 184W / 285W			100W / 152W / 170W / 205W
Normal
		< 1W			< 1W
Power Saving

2-6

2 Product Specifications

2-7 Option Specification

Item

Item Name

Code.No

Remark

Remote Control

& BN59-00507A

Batteries (AAA x 2)

Power Cord

3903-000042

Cleaning Cloth

BN63-001798A

Owner's

Instructions BN68-00983A

27" : BN90-01005A

Stand 32" : BN90-00967A 37" : BN90-00966A

40" : BN90-00966A

27" : BN63-02415B

Cover-Bottom 32" : BN63-02415B 37" : BN63-02416B

40" : BN63-02416B

2-7

2 Product Specifications

Memo

2-8

3 Alignments and Adjustments

3 Alignments and Adjustments

3-1 Service Instruction

1.Usually, a color TV-VCR 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.

3-1

3 Alignments and Adjustments

3-2 How to Access Service Mode

3-2-1 Entering Factory Mode

1.To enter "Service Mode" Press the remote -control keys in this sequence : - If you do not have Factory remote - control

INFO MENU MUTE

-If you have Factory remote - control

-The buttons are active in the service mode.

1.Remote - Control Key : Power, Arrow Up, Arrow Down, Arrow Left

Arrow Right, Menu, Enter, Number Key(0~9) 2. Function - Control Key : Power, CH +, CH -, VOL +, VOL -,

Menu, TV/VIDEO(Enter)

3-2-2 Panel Check

Specially for LE26,32R7**, You have to check Panel Maker Because of different adjustments as follows. First of all, Check the label rating!

1) Label Rating File

PANEL MAKER

If Panel Mark is "A", Set the factory mode				Panel BOM(Bill of material) : BN07-00247A
indicating as follows.				Connector between Panel and Power Unit
				: BN39-00603M (300mm)
Panel BOM(Bill of material) : BN07-00289A				* Option Byte
Connector between Panel and Power Unit				1. Gamma "AMLCD"
: BN39-00603M (300mm)				2. Panel Option "AMLCD_INT"
				If Panel Mark is "C" , Set the Factory mode
* Option Byte				indicating as follows.
1. Gamma "AUO"				Panel BOM(Bill of Material) : BN07-00207A
2. Panel Option "AUO"				Connecotor between Panel and Powe Unit :
				BN39-00659A(200mm)
If Panel Mark is "S" or not printed.				* Option Byte
Set the factory mode indicating as follows.				1. Gamma " CMO "
				2. Panel Option " CMO "
				Others are same shown below.
3-2

3 Alignments and Adjustments

3-3 Factory Data

1.	Calibration
2.	Option Table	XXXX XXXX

3.White Balance

4.SVP-FX

5.Option Block

6.STV8257/STA323W

7.YC Delay

8.Adjust

9.I2C Check

10.W/B MOVIE

11.Checksum

12.Reset

13.Spread Spectrum

T-MILMPEU-1006 (Main Micom Ver)

T-MILMPEUS-1002 (Sub Micom Ver)

Month / Day / Year / Hour / Min. / Sec.

1.Calibration

1)AV Calibration

2)DTV Calibration

3)PC Calibration

2. Option Table	XXXX XXXX
Inch Option	32"	Carrier Mute	ON	TTX Group	Auto
Gamma	OFF	Language	English	Auto Power	ON
Panel Option	AMLCD_INT	Auto FM	ON	----	OFF
2HDMI	OFF	High Deviation	OFF	----	G
Brt.Sensor	OFF	TTX	ON	----	OFF
EnergySave	ON	TTX List	ON	Debug	OFF
LBE/FBE	OFF	ACR	OFF	Ch.Table	SUWON
FRC(Micronas)	OFF	Dynamic CE	ON	iDTV_Cntry	UK
FRC(Samsung)	OFF	Dynamic Dimming	ON	Dynamic Contrast	OFF
LNA	OFF	Tuner TOP	10

3-3

3 Alignments and Adjustments

3-4

3 Alignments and Adjustments

3-5

3 Alignments and Adjustments

3-4 Service Adjustment

3-4-1 White Balance - Calibration

If picture color is wrong, do calibration first.

Equipment : CA210, Patten : chess pattern

Execute calibration in Factory Mode

Source AV : PAL composite, Component : 1280*720/60Hz

PC : 1024*768/60Hz

( chess patten )

3-4-2 White Balance - Adjustment

If picture color is wrong, check White Balance condition.

Equipment : CA210, Patten : Toshiba

Adjust W/B in Factory Mode

Sub brightness and R/G/B Offset controls low light region

Sub contrast and R/G/B Gain controls high light region

Source AV : PAL composite, Component : 1280*720/60Hz

HDMI[DVI] : 1280*720/60Hz

[ Test Pattern : MSPG-945 Series Pattern #16 ]

*Color temperature

1500K +/-500, -6 ~-20 MPCD

	*Color coordinate
	H/L : 267/263 +/- 2	35.0 Ft +/- 2.0Ft
	L/L : 270/260 +/- 3	1.5 Ft +/- 0.2Ft
	Toshiba Patten

3-6

3 Alignments and Adjustments

3-4-3 Conditions for Measurement

1.On the basis of toshiba ABL pattern : High Light level (57 IRE) - INPUT SIGNAL GENERATOR : MSPG-925LTH

* Mode	NO	2	: 744X484@60 Hz
	NO	6	: 1280X720@60 Hz
	NO 21		: 1024X768@60 Hz
* Pattern	NO	36	: 16 Color Pattern
	NO	16	: Toshiba ABL Pattern

2.Optical measuring device : CA210 (FL)

Please use the MSPG-925 LTH generator for model LE26M51B/LE32M51B/LE40M51B/LE46M51B.

3-4-4 Method of Adjustment

1. Adjust the white balance of AV, Component and DVI Modes.

(AV Component)

a) Set the input to the mode in which the adjustment will be made (RF DTV PC DVI).

*Input signal - VIDEO Mode : Model #2 (744*484 Mode), Pattern #16

-DTV,DVI Mode : Model #6 (1280*720 Mode), Pattern #16

-HDMI Mode: Model #6(1280*720 Mode), Pattern #16

b)Enter factory color control, confirm the data.

c)Adjust the low light. (Refer to table 1, 2 in adjustment position by mode)

-Adjust sub - Brightness to set the 'Y' value.

-Adjust red offset ('x') and blue offset ('y') to the color coordinates.

Picture 4-2 Toshiba ABL Pattern

Low light

Measurement point

*Do not adjust green offset data.

d)Adjust the high light. (Refer to table 1, 2 in adjustment position by mode) - Adjust red gain ('x') and blue gain ('y') to the color coordinates.

*Do not adjust the green gain and sub-contrast (Y) data.

3-7

3 Alignments and Adjustments

d)Adjust the high light. (Refer to table 1, 2 in adjustment position by mode) - Adjust red gain ('x') and blue gain ('y') to the color coordinates.

* Do not adjust the green gain and sub-contrast (Y) data.

Picture 4-3 Toshiba ABL Pattern

High light

Measurement point

3-8

3 Alignments and Adjustments

3-5 Software Upgrade

3-5-1 How to Update Flash ROM

1.Installthe Flash Downloader

ConnectSet(Service Jack)and Jig Cable to execute Program Update.

2.Flash Downloader program update

-Before Turning on the set,Click "connect"which is under of OSD Screen! -Turn on the Set.

3-9

3 Alignments and Adjustments

Memo

3-10

4 Troubleshooting

4 Troubleshooting

4-1 First Checklist for Troubleshooting

1.Check the various cable connections first.

-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.

2.Check the power input to the Main Board.

3.Check the voltage in and out between the SMPSMain Board, between the SMPS INVERTER Board, and between the Main LVDS Boards.

4-1

4 Troubleshooting

4-2 Checkpoints by Error Mode

4-2-1 No Power

LAMP off, power indicator LED red color?

Yes

Does proper DC 12V appear at CN800?

Yes

Does proper DC A3.3V, A5V appear at C854, C866?

Yes

Does proper DC 5V, 3.3V, 1.8V appear at C811, C853, C833?

Yes

A power is supplied to set?

No

Check a connection a power cable.

No

Change a Assy PCB Power.

No	Check a IC809, IC802.
	Change a main PCB ass'y.

No	Check a IC803, IC805, IC813, IC307.
	Change a main PCB ass'y

No	Check a other function.
	(No picture part)
	Replace a lcd panel.

4-2

4 Troubleshooting

4-2-2 No Video (Analog PC)

Power Indicator is off.

Lamp on, no video.

Yes

Check a PC source and check the connection of DSUB cable?

Yes

Does the signal appear at 1 #30, 22, 38(R, G, B) of IC500?

Yes

Does the digital data appear at the output of

LVDS (R563_OP~R572_OP)?

Yes

Check a LVDS cable?

Replace a lcd panel?

No

No

No

No

Input a analog PC signal and connected cable(DPMS).

PC cable. Change a PC cable. Change a main PCB ass'y.

Check a IC500 Change a main PCB ass'y.

Please, Call to Samsung Co. LTD.

4-3

4 Troubleshooting

WAVEFORMS

1 R,G,B Output Signal of IC500

4-4

4 Troubleshooting

4-2-3 No Video (Digital-HDMI)

Power Indicator is off.

Lamp on, no video.

Yes

Check the connection of HDMI cable?

Yes

Does the digital data appear at 3 R503~R510?

Yes

2 Does the digital data appear at output of IC500

LVDS(R563_OP~R572_OP)?

Yes

Check a LVDS cable?

Replace lcd panel?

No

Input a HDMI cable.

No	Check a a IC 500
	Change a main PCB ass'y.

No	Check a IC500
	Change a main PCB ass'y.

No

Please, Call to Samsung Co. LTD.

4-5

4 Troubleshooting

2		Digital Output Data of IC500			3		Signal of HDMI(Data)

4-6