Samsung LT19C300, LT22C300, T24C300 Schematic

LED Monitor

Chassis : WVN2

Model : T19C300**

Chassis : WFB2

Model : T22C300**

T24C300**

SERVICE Manual

LED Monitor		Contents

1. Precautions

2. Product specifications

3. Disassembly and Reassembly

4. Troubleshooting

5. Wiring Diagram

LT**C300**

			Contents
1. Precautions....................................................................................................................			1-1
1-1.	Safety Precautions...............................................................................................................		1-1
1-1-1. Warnings........................................................................................................................			1-1
1-1-2.		Servicing the LED Monitor.............................................................................................	1-1
1-1-3.		Fire and Shock Hazard..................................................................................................	1-1
1-1-4.		Product Safety Notices..................................................................................................	1-1
1-2.	Servicing Precautions..........................................................................................................		1-2
1-2-1.		General Servicing Precautions......................................................................................	1-2
1-3.	Static Electricity Precautions................................................................................................		1-3
1-4.	Installation Precautions........................................................................................................		1-4

2. Product specifications..................................................................................................			2-1
2-1.	Model Comparison...............................................................................................................		2-1
2-2.	Feature & Specifications......................................................................................................		2-2
2-2-1.		Feature..........................................................................................................................	2-2
2-2-2.		Specifications................................................................................................................	2-3
2-3.	Specification Comparison to Old Models.............................................................................		2-6
2-4.	Detail Factory Option...........................................................................................................		2-7
2-5. Accessories..........................................................................................................................			2-8

3. Disassembly and Reassembly.....................................................................................	3-1
3-1. Disassembly and Reassembly.............................................................................................	3-1
4. Troubleshooting............................................................................................................	4-1
4-1. Previous check.....................................................................................................................	4-1
4-2. How to check fault symptom................................................................................................	4-2
4-2-1. No Power.......................................................................................................................	4-2
4-2-2. No video (Analog PC signal).........................................................................................	4-4
4-2-3. No video (HDMI1 - Digital signal)..................................................................................	4-7
4-2-4. No video (Tuner_CVBS)..............................................................................................	4-10
4-2-5. No video (Tuner DTV)..................................................................................................	4-14
4-2-6. No video (Video CVBS)...............................................................................................	4-18
4-2-7. No video (Component)................................................................................................	4-22
4-2-8. No sound.....................................................................................................................	4-25
4-4. Adjustment.........................................................................................................................	4-28
4-4-1. Service Instruction.......................................................................................................	4-28
4-4-2. How to Access Service Mode......................................................................................	4-28
4-4-3. Service Mode Menu.....................................................................................................	4-29
4-4-4. White Balance - Calibration.........................................................................................	4-41
4-4-5. White Balance - Adjustment........................................................................................	4-43
4-5. Software Upgrade..............................................................................................................	4-45
4-5-1. How to check the SW version......................................................................................	4-45
4-5-2. How to Upgade SW and Micom..................................................................................	4-47
5. Wiring Diagram..............................................................................................................	5-1
5-1. Wiring Diagram....................................................................................................................	5-1
5-2. Board Connection................................................................................................................	5-2
5-3. Connector Functions............................................................................................................	5-4
5-4. Cables..................................................................................................................................	5-4
A. Exploded View & Part List [TC300]............................................................................	A-1

A-1. Exploded View....................................................................................................................	A-1
A-1-1. Parts List (T19C300**).................................................................................................	A-2

A-1-2. Electrical Parts List (T19C300**)..................................................................................		A-2
A-2-1.	Parts List (T22C300**).................................................................................................	A-5
A-2-2.	Electrical Parts List (T22C300**)..................................................................................	A-5
A-3-1.	Parts List (T24C300**).................................................................................................	A-8
A-3-2.	Electrical Parts List (T24C300**)..................................................................................	A-8

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.

© 2013 Samsung Electronics Co.,Ltd. All rights reserved.

Printed in Korea

3. Disassembly and Reassemble

3. Disassembly and Reassembly

This section of the service manual describes the disassembly and reassembly procedures for the Monitor.

As this monitor has parts that are sensitive to static electricity, be careful when handling them.

WARNING

3-1. Disassembly and Reassembly

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.

CAUTION 3. Disassemble the monitor carefully as directed in the following procedures.

	Description	Inch	Picture Description	Screws
1	Place monitor face down on
	cushioned table.

All

2	stand.Remove single screw from the

All

3-1

3. Disassembly and Reassemble

	Description	Inch	Picture Description	Screws
3	cover.Remove 4 screws from the rear-
		21.5"
		24"		6003-001086

Remove 3 screws from the rearcover.

18.5"

4	Remove the one screw in
	interface area.

18.5"	6003-001782
21.5"
24"

3-2

3. Disassembly and Reassemble

		Description	Inch	Picture Description	Screws
5	Detach the front from monitor.
		: locking point (14 point)

All

6	Lift up the rear-cover.

All

7	Remove the 4 screws of main
	board and 3 screws SMPS

board.

6003-000115

All

3-3

3. Disassembly and Reassemble

	Description	Inch	Picture Description	Screws
8	speaker.Remove the left and right
		All

9 Remove the panel bracket.

All

10 Lift up the panel bracket.

All

11	Lift up the panel.
		: locking point

All

3-4

3. Disassembly and Reassemble

How to disassembly Function & IR ASSY

Description

Inch

Picture Description

Screws

1	There is no clip.	All
2	Heat the Function Assy by Heat
	Gun and Lift up the Function
	Assy.

All

NOTE

Reassembly procedures are in the reverse order of disassembly procedures.

3-5

1. Precautions

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.

WARNING	Disconnect the AC power and DC power jack before servicing.

1-1-2. Servicing the LED Monitor

1.When servicing the LED 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:

	(READING SHOULD)
	NOT BE ABOVE 0.5mA	LEAKAGE
	DEVICE
		CURRENT
	UNDER
		TESTER
	TEST
	TEST ALL
	EXPOSED METAL
	SURFACES
	2-WIRE CORD
	ALSO TEST WITH PLUG
	REVERSED (USING AC	EARTH
	ADAPTER PLUG AS
	REQUIRED)	GROUND

Do not use an isolation transformer during this test.

		Use a leakage current tester or a metering system that complies with American National Standards
	WARNING	Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication
		UL1410, 59.7).

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

CAUTION

NOTE

An electrolytic capacitor installed with the wrong polarity might explode.

Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual.

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 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.

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.

1-2

1. Precautions

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.

Be sure no power is applied to the chassis or circuit and observe all other safety precautions.

CAUTION

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

1. Precautions

1-4. Installation Precautions

1.For safety reasons, more than a 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 (0.4m) between the product and the wall for ventilation purposes.

A rise in temperature within the product may cause fire.

8.If an equipment is provided with a replaceable battery, and if replacement by an incorrect type could result in an explosion (for example, with some lithium batteries), the following applies:

RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.

CAUTION	DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.

1-4

2. Product specifications

2. Product specifications

2-1. Model Comparison

TC300

Front View

Detail View

Front Color	Semitransparent Rose Black
Panel Type	TN
Internal Memory	None
DDR	256 Mbtye
Feature	Media Play(MOVIE)

2-1

2. Product specifications

2-2. Feature & Specifications

2-2-1. Feature

•RF, 1-HDMI, 1-Component, 1-A/V, 1-USB2.0, D-SUB

•Brightness: 250cd/m2

•High Contrast Ratio: 1,000

•Response Time: 5ms

•Excellent Picture Quality

•Dynamic Contrast

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

•Monitor Tuner, HDMI, Stereo, SRS Trusurround support

•Convenience

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

2-2

2. Product specifications

2-2-2. Specifications

Model Name			T19C300**
	Item		Description
LCD Panel			19 inch HD 60Hz
Scanning Frequency			Horizontal: 31 kHz ~ 80 kHz (Automatic)
			Vertical: 50 Hz ~ 75 Hz (Automatic)
Display Colors			16.7 Million colors
Maximum resolution			Horizontal : 1366 Pixels
			Vertical : 768 Pixels
Input Signal			Analog 0.7 Vp-p ± 5% positive at 75Ω, internally terminated
Input Sync Signal			H/V Separate, TTL, P. or N.
Maximum Pixel Clock rate			85 MHz
Active Display (Horizontal/Vertical)			409.8 (H) x 230.4 (V) (mm) / 16.1 (H) x 9.1 (V) (inches)
AC power voltage & Frequency			AC 90V~240V, 60/50Hz ± 3Hz
Power Consumption			Under 35 W(Under 0.5 W, Stand by)
Dimensions		With Stand	444.7 x 356.4 x 187 (mm) / 17.5 x 14.0 x 7.4 (inches)
(WxHxD)
		Without Stand	444.7 x 278.2 x 48.5 (mm) / 17.5 x 11.0 x 2.0 (inches)
Weight		With Stand	3.2 (kg) / 7.05 (lbs)
		Without Stand	3.05 (kg) / 6.72 (lbs)
TV System		Tuning	Frequency Synthesize
		System	NTSC, PAL
		Sound	NTSC, PAL
Audio Specifications			MAX Internal Audio Output Power : Each 5W(Left/Right)
			Equalizer : 5band
			Output Frequency
			• RF : 20 Hz ~ 15.4 kHz
			• AV/Componet/HDMI : 20 Hz ~ 20 kHz
Environmental		Operating	Operating Temperature : 50°F - 104°F (10°C - 40°C)
considerations			Humidity : 10% - 80 %
		Storage	Storage Temperature : -4°F - 113°F (-20°C - 45°C)
			Humidity : 5% - 95%

Note: Dolby Digital +, Game Mode, Film Mode, Energy Saving

2-3

2. Product specifications

Model Name			T22C300**
	Item		Description
LCD Panel			21.5 inch FHD 60Hz
Scanning Frequency			Horizontal: 31 kHz ~ 80 kHz (Automatic)
			Vertical: 50 Hz ~ 75 Hz (Automatic)
Display Colors			16.7 Million colors
Maximum resolution			Horizontal: 1920 Pixels
			Vertical: 1080 Pixels
Input Signal			Analog 0.7 Vp-p ± 5% positive at 75Ω, internally terminated
Input Sync Signal			H/V Separate, TTL, P. or N.
Maximum Pixel Clock rate			85 MHz
Active Display (Horizontal/Vertical)			476.6 (H) x 268.1 (V) (mm) / 18.8 (H) x 10.6 (V) (inches)
AC power voltage & Frequency			AC 90V~240V, 60/50Hz ± 3Hz
Power Consumption			Under 35 W(Under 0.5 W, Stand by)
Dimensions		With Stand	509.7 x 396.6 x 195 (mm) / 20.1 x 15.6 x 7.7 (inches)
(WxHxD)
		Without Stand	509.7 x 318.2 x 47 (mm) / 20.1 x 12.5 x 1.9 (inches)
Weight		With Stand	3.95 (kg) / 8.7 (lbs)
		Without Stand	3.7 (kg) / 8.16 (lbs)
TV System		Tuning	Frequency Synthesize
		System	NTSC, PAL
		Sound	NTSC, PAL
Audio Specifications			MAX Internal Audio Output Power : Each 5W(Left/Right)
			Equalizer : 5band
			Output Frequency
			• RF : 20 Hz ~ 15.4 kHz
			• AV/Componet/HDMI : 20 Hz ~ 20 kHz
Environmental		Operating	Operating Temperature : 50°F - 104°F (10°C - 40°C)
considerations			Humidity : 10% - 80 %
		Storage	Storage Temperature : -4°F - 113°F (-20°C - 45°C)
			Humidity : 5% - 95%

Note: Dolby Digital +, Game Mode, Film Mode, Energy Saving

2-4

2. Product specifications

Model Name			T24C300**
	Item		Description
LCD Panel			24 inch FHD 60Hz
Scanning Frequency			Horizontal: 31 kHz ~ 80 kHz (Automatic)
			Vertical: 50 Hz ~ 75 Hz (Automatic)
Display Colors			16.7 Million colors
Maximum resolution			Horizontal: 1920 Pixels
			Vertical: 1080 Pixels
Input Signal			Analog 0.7 Vp-p ± 5% positive at 75Ω, internally terminated
Input Sync Signal			H/V Separate, TTL, P. or N.
Maximum Pixel Clock rate			85 MHz
Active Display (Horizontal/Vertical)			531.36 (H) x 298.89 (V) (mm) / 20.92 (H) x 11.77 (V) (inches)
AC power voltage & Frequency			AC 90V~240V, 60/50Hz ± 3Hz
Power Consumption			Under 40 W(Under 0.5 W, Stand by)
Dimensions		With Stand	569.2 x 428 x 195 (mm) / 22.4 x 16.9 x 7.7 (inches)
(WxHxD)
		Without Stand	569.2 x 349.4 x 49 (mm) / 22.4 x 13.8 x 1.9 (inches)
Weight		With Stand	4.45 (kg) / 9.81 (lbs)
		Without Stand	4.15 (kg) / 9.15 (lbs)
TV System		Tuning	Frequency Synthesize
		System	NTSC, PAL
		Sound	NTSC, PAL
Audio Specifications			MAX Internal Audio Output Power : Each 5W(Left/Right)
			Equalizer : 5band
			Output Frequency
			• RF : 20 Hz ~ 15.4 kHz
			• AV/Componet/HDMI : 20 Hz ~ 20 kHz
Environmental		Operating	Operating Temperature : 50°F - 104°F (10°C - 40°C)
considerations			Humidity : 10% - 80 %
		Storage	Storage Temperature : -4°F - 113°F (-20°C - 45°C)
			Humidity : 5% - 95%

Note: Dolby Digital +, Game Mode, Film Mode, Energy Saving

2-5

2. Product specifications

2-3. Specification Comparison to Old Models

				O : application, X : non-application
Model		TC300		TB300 / TB350 / TB530 /TB531
		(T**C300)		(T**B300 / T**B350 / T**B530/T**B531)

Design

Diplay Type		LCD		LCD
Built-in Tuner	1		1
Resolution		1920 x 1080 (21.5", 24")		1920 x 1080 (21.5", 23", 23.6", 24", 27")
		1366 x 768 (18.5")		1366 x 768 (18.5")
LCD Panel		TFT LED PANEL		TFT LED PANEL
Screen Size	19" / 22" / 24"		19" / 22" / 23" / 23.6" / 24" / 27"
Picture ratio	16:9		16:9
Brightness		250 cd/m2		250 cd/m2
Contrast Ratio	1,000		1,000
Picture Enhancer		HyperReal Engine (X9)		HyperReal Engine (X9)
Equalizer		5 Band		5 Band
Auto Volume Control		O		O
Surround Sound		Dolby Digital Plus/Pulse		Dolby Digital Plus/Pulse
Speaker Output		5W X 5W		5W X 5W
PIP		O		O
Double Window		O		O
Caption		O		O
Entertainment Mode		X		X
Game Mode		O		O
Energy Saving		O		O
Anynet+		X		X
Antenna		1(Cable/Air)		1(Cable/Air)

2-6

2. Product specifications

2-4. Detail Factory Option

If you replace the main board with new one, please change the factory option as well. The options you must change are “Type”

TC300

	Model Name			T19C300**	T22C300**	T24C300**
			Vendor	AML	CMI	AUO
Panel			CODE	BN07-01043A	BN07-01076A	BN07-00929A
			SPEC	LTM185AT05-V	M215HGE-L21	M240HW01-VB
SMPS			PD Board	BN44-00504A	BN44-00505A	BN44-00505A
Byte			Item
0		Factory Reset
1			Type	19A6TH1E	22D6TF0E	24L6TF0E
2		Local Set			EU
3			Model		TC300
4		SVC Model			300
4			Tuner	AUTO/SI_ATC2/SEC_TC/SEC_ISDB/DVB_TCS2/
				DVB_T2C/DVB_T2CS2/ECHO_CD/NO_TUNER
5		Ch Table			NONE
6		Front Color			NONE

2-7

2. Product specifications

2-5. Accessories
Product	Description	Code. No	Remark
	Remote Control &	AA59-00622A
	Batteries
		4301-000121
	(AAA x 2)
	Quick Setup Guide	BN68-04796A
	Cloth clean	BN63-01798B
	Owners Manual	BN46-00319A
			Samsung Electronics
			Service Center
			(The part code for some
	Power Cord	3903-000525	accessories may differ
			depending on your
			region.)
	D-Sub Cable	BN39-00244H
	Stereo Cable	BN39-01286A
	Stand Base	-
	Stand Body & Screw	-
	(1EA)
2-8

4. Troubleshooting

4. Troubleshooting

4-1. Previous check

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 or loose cable connection.

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

2.Check the power input to the Main Board.

	LVDS Cable
SMPS Assy	Main Assy
	14P Cable

Speaker

Speaker

Main Assy

1	B5V	8	GND
2	SW_POWER	9	B12VS
3	B5V	10	SW_INVERTER
4	A5V	11	B13V
5	GND	12	NC
6	GND	13	B13V
7	B12VS	14	PWM_DIMM

SMPS Assy

1	B13V	8	PWM_DIMM
2	B13V	9	NC
3	Vamp	10	BLU_ON
4	Vamp	11	GND
5	GND	12	GND
6	B5V	13	A5V
7	B5V	14	PS_ON

4-1

4. Troubleshooting

4-2. How to check fault symptom

4-2-1. No Power

	Symptom	The LED on the front panel of the monitor does not work when the power is connected and the Power
		button is pressed.

•Check if the Power switch on the rear panel of the monitor has been turned on.

Major	• Check the SMPS fuse and output power of power adapter.
checkpoints	• Check the power part of the Main Board and check if a similar symptom appears at another output
	terminal.
		Power indicator LED on?								Check an AC power connection.
							No
			Yes
		Check the 14P power cable.								Change 14p power cable and
							No
										SMPS.
			Yes
		Check the ‘Stand-By 5V’, DCA5V appear
							No
		at BD207?
			Yes							Change SMPS.
		Check the ‘Power input of Main Ass’y’ ?
		DC B13V, B5V appear at BD209(B13V),
							No
		BD213/208(B5V)?
Diagnostics			Yes
		Check the ‘Power input of submicom
		IC(A3.3V)’ ?
		Check the ‘Power of nand flash
		IC(B3.3V)’ , ‘Power of main IC(B2.5V,								Change the Main Assy.
							No
		B1.1V)’, ‘Power of DDR IC(B1.5V)’
		appear at IC202(#5), L201 (B3.3V),
		BD1008/9/10/11 (B2.5V), BD1002
		(B1.2V), BD1012 (B1.5V)?
			Yes
		Check ‘Power of LVDS (13V)’ appear								Reconnect of Change the LVDS
		at LVDS connector Pin #1~5 of T-con
							No
										cable.
		board?
			Yes
		Please, Contact tech support.

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

4-2