Samsung LN-S4092D, LN-4692D Schematic

LCD-TV

Chassis GMO40KU

GMO46KU

Model LN-S4092D

LN-S4692D

SERVICE Manual

TFT-LCD TV		Fashion Feature

- RF, DVI-D, PC(Analog), Component, Video, S-Video

- Brightness : 500cd/ - Respense time : 16ms - Dynamic contrast

- PIP (on PC only)

-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 : BN82-00146A-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 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.

1-1

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 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.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

-RF, HDMI(DVI-D), PC(Analog), Component, Video, S-Video

-Brightness : 500cd/

-Respense time : 16ms

-Dynamic contrast

-PIP (on PC only)

2-1

2 Product Specifications

2-2 Specifications

2-2-1 LN-S4092D Specifications

Item				Description
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 75Ω, internally terminated
Input Sync Signal	Type : Seperate H/V
Level : TTL level
Maximum Pixel Clock rate	80 MHz
Active Display
Horizontal/Vertical	885.168 mm / 497.664 mm
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		Tunning			Frequency Synthesize
		System			ATSC, NTSC
		Sound			MONO, STEREO, SAP
Antena Input	75Ω

- 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

2-2

2 Product Specifications

2-2-2 LN-S4692D Specifications

	Item					Description
	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 75Ω, 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 %
			Tunning			Frequency Synthesize
	TV System
			System			ATSC, NTSC
			Sound			MONO, STEREO, SAP
	Antena Input	75Ω
		- 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

2-3

2 Product Specifications

2-2-4 Spec Comparison

Model	LN-R408D	LN-S4092D / LN-S4692D

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	1360 x 768 / 60 Hz	1360 x 768 / 80 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
	Normal	100W / 140W / 170W	240W / 330W
	Power Saving	< 2W	< 1W
	Input source	DVI-D	HDMI
	Difference
	PIP	PIP(PC Only)	PIP, POP
	Sound	3W / 5W / 7.5W	10W

2-4

2 Product Specifications

2-3 Option Specification

Item	Item Name	Code.No	Remark
	Remote Control &	BN59-00511A
	Batteries (AAA x 2)

Power Cord

3903-000144

Cover-Bottom BN63-01938A

Stand

BN90-00821B

Stand Screw (4 ea)

6002-001294

Owner's Instructions

BN68-01001B

Cleaning Cloth

BN63-07198A

Warranty Card /

Registration

Card /Safety Guide Manual BN68-00860A

(Not available in all locations)

2-5

2 Product Specifications

Memo

2-6

3 Alignments and Adjustments

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.

3-1

3 Alignments and Adjustments

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

Power OFF				MUTE				1				8				2				Power On

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

3-2-3 Factory Data

3-2

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

	AV/S-VIDEO
Calibration		Checksum
Option Byte		KS1406
White Balance		KS1409
W/B Movie		Dynamic Contrast
SVP-PX		EEPROM Access Count
LBE		RESET
SOUND(STV825X)
Sub Micom Download

T-BORDNUS0-0064 Dec 27 2005

T-BORDNUS5-0053 [Sec:47]

A G C_REF[A IR]

0x50

PA CK ET _ERR_T H R

0x8

CR_F_G A IN [A IR]

0xD0B

CR_L_G A IN [A IR]

0x24

EQ _ST EP[A IR]

0xB

PILO T _G A IN [A IR]

0x1612

A G C_REF[CA BLE]

0x50

CR_F_G A IN [CA BLE]

0xD 0B

CR_L_GA IN [CA BLE]

0x24

EQ _ST EP[CA BLE]

0xB

PILO T _G A IN [CA BLE]

0x1

CR_F2_G A IN [CA BLE]

0x1612

	AV/S-VIDEO
Calibration		Checksum
Option Byte		KS1406
White Balance		KS1409
W/B Movie		Dynamic Contrast
SVP-PX		EEPROM Access Count
LBE		RESET
SOUND(STV825X)

Sub Micom Download

T-BORDNUS0-0064 Dec 27 2005

T-BORDNUS5-0053 [Sec:47]

D ynam ic CE	O n
D ynam ic D im m ing	O n
LBE Y_M EA N REA D

3-7

3 Alignments and Adjustments

3-8

3 Alignments and Adjustments

3-3 White Balance - Calibration

3-3-1 White Balance -Calibration

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

3-3-2 White Balance - Adjustment

				(low light)	(hight light)
3. W/B				Sub Bright	Sub Contrast
				R offset	R gain
				G offset	G gain
				B offset	B gain
					(W/B adjustment Condition refer next page)

3-3-3 Conditions for Measurement

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.

3-9

3 Alignments and Adjustments

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	20mm
	with that of the Master equipment.	20mm
	- 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)

-White Balance Manual Adjustment (ABL Pattern)

Adjustment Coordinate

x

y

Y (cd/m2)

T(K) + MPCD

L/L

263

263

-

15000K/0

CVBS

L/L

263

263

3.8(1.1Ft)

15000K/0

Component

H/L

263

263

-

15000K/0

(720p)

L/L

263

263

4.2(1.2Ft)

15000K/0

HDMI

H/L

263

263

-

15000K/0

(1080i)

L/L

263

263

4.2(1.2Ft)

15000K/0

-Adjustment Specification

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

3-10

3 Alignments and Adjustments

3-5 Servicing Information

3-5-1 USB Download Method

1.Downloading boot code

©ç Change the boot code's file name into "boot.bin".

©è Copy the "boot.bin" into the path "/bordeaux/us" in USB flash driver. ©é Turn off LCD TV.

©ê Insert the USB flash driver into the service 1 jack of LCD TV. ©ë Turn on LCD TV.

©ì The banner osd "Updating SW..." is displayed.

©í The banner osd "Completed..." is displayed when the updating is completed. ©î Turn off and remove the USB flash driver from LCD TV

©ï Check the program version.

2.Downloading application code

©ç Change the application code's file name into "appl.rom".

©è Copy the "appl.rom" into the path "/bordeaux/us" in USB flash driver. ©é Turn off LCD TV.

©ê Insert the USB flash driver into the service 1 jack of LCD TV. ©ë Turn on LCD TV.

©ì The banner osd "Updating SW..." is displayed.

©í The banner osd "Completed..." is displayed when the updating is completed. ©î Turn off and remove the USB flash driver from LCD TV

©ï Check the program version.

3-11

3 Alignments and Adjustments

Memo

3-12

4 Troubleshooting

4 Troubleshooting

4-1 No Power

LAMP Off, power indicator LED red color ?

Yes

Does proper Stand-By DC A6.2V appear at C156 ?

Yes

Does proper Main DC

B12V,B5V,B12VS appear at

C106, C115, C119?

Yes

Does proper Inverter DC 24V appear at CNM802, CNM803 in SMPS?

Yes

Does proper DC A5V,A3.3V appear at C154, C151 ?

Yes

Does proper DC B9V,B8V,VCC5P,B3.3V_1,B3.3V_2, B5V_VCC appear at C108, C110, C123, C128, C135, C133 ?

Yes

Does proper DC 1.8V appear at C1103, C1154, C364, C1011 ?

Yes

Does proper DC 2.5V appear at C1214, C1746 ?

Yes

A power is supplied to set ?

	No		Check a connection power cable.
	Yes	No	P/N: BN39-00691B
			Change the Main Power Ass'y
			26": BN96-03060A
			32": BN96-03057A
			40": BN44-00134A
		No
		No
		No	Check IC106, IC107
			Change the Main Ass'y
			BN94-00850A
		No	Check
			IC101, IC102, IC103, IC104, IC105
			Change the Main Ass'y BN94-00850A
		No
			Check IC1101, IC1102, IC304, IC1001
			Change the Main Ass'y BN94-00850A
		No
			Check IC1201, IC1702
			Change the Main Ass'y BN94-00850A
			Check a other function (No picture part)
		No	Replace a LCD Panel
			26": BN07-00254A
			32": BN07-00253A
			40": BN07-00264A

4-1

4 Troubleshooting

4-2 No Video (Analog PC Signal)

Power Indicator is off.

Lamp on, no video

Yes

Check a PC source and check the connection of DSUB?

Yes

Does the signal appear at 1 #30,#22,#38,#41,#42

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

Yes

Does the digital data appear at 2 output of R1034~7, R1039?

Yes

Does the digital data 3 appear at output of R1010~5, R1024~7?

Yes

Check a LVDS cable? Replace a LCD panel?

No	Input a analog PC signal.
	Check a connected cable.

No	Check JA801, PC cable.
	Change a PC cable. Change a main
	PCB ass'y

No	Check IC901

Change a main PCB ass'y

No	Check IC1002

Change a main PCB ass'y

No

Please, Call to Samsung Co. LTD

4-2

4 Troubleshooting

WAVEFORMS

1 2

3

4-3

4 Troubleshooting

4-3 No Video (HDMI - Digital Signal)

Power Indicator is off.

Lamp on, no video.

Yes

Check a HDMI source and check the connection of HDMI cable?

Yes

Does the signal appear at R874,R876,R878,R879,R88

42,R883,R886-R891(Data), R884-5,R892-3(Clk+/-) ?

Yes

Does the digital data 5 appear at output of

R901-8 ?

Yes

Does the digital data

6 appear at output of R1034- 7, R1039 ?

Yes

Does the digital data

7 appear at output of R1010- 5, R1024-7 ?

Yes

Check a LVDS cable ? Replace a LCD panel ?

No	Input a HDMI signal.

Check a connected cable.

No	Check JA802, JA804, HDMI cable.
	Change a HDMI cable. Change a
	main PCB ass'y

No	Check IC805
	Change a main PCB ass'y

No	Check IC901

Change a main PCB ass'y

No	Check IC1002
	Change a main PCB ass'y

No

Please, Call to Samsung Co. LTD.

4-4

4 Troubleshooting

WAVEFORMS

4 5

4-5

4 Troubleshooting

4-4 No Picture (Tuner_CVBS)

Power Indicator is off.

Lamp on, no picture.

Yes

Check a RF source and check the connection of RF cable ?

Yes

	Does the signal appear at
	the main splitter cable ?
		Yes
	Does the signal appear at
8
	C912 ?

No	Input a RF signal.
	Check a connected cable.

Check CN501.

No Check splitter cable connection. Change a main PCB ass'y or splitter

cable.

No	Check TU501.
	Change a main PCB ass'y or tuner.

Yes

Does the digital data

9appear at output of R1034-7, R1039 ?

Yes

Does the digital data

10 appear at output of R1010- 5, R1024-7 ?

Yes

Check a LVDS cable ? Replace a LCD panel ?

No	Check IC901

Change a main PCB ass'y

No	Check IC1002

Change a main PCB ass'y

No

Please, Call to Samsung Co. LTD.

4-6