Samsung LA22B650T6M Schematic

LCD-TV

Chassis : N65B
Model : LA22B650T6M

SERVICE

Manual

TFT-LCD TV Contents

1. Precautions

2. Product specications

3. Disassembly and

4. Troubleshootin

5. Exploded View & Part Lis

6. Wiring Diagra

LA22B650T6M

Reassembly

g

m

t

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

Contents

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 specications ............................................................................................ 2-1

2-1. Feature & Specications ................................................................................................. 2-1

2-2. Specication Comparison to Old Models ........................................................................ 2-2

2-3. Accessories .................................................................................................................... 2-3

3. Disassembly and Reassembly ............................................................................... 3-1

3-1. Disassembly and Reassembly (LA650) .......................................................................... 3-1

4. Troubleshooting ...................................................................................................... 4-1

4-1. Troubleshooting .............................................................................................................. 4-1

4-2. Alignments and Adjustments ........................................................................................ 4-25

4-3. Factory Mode Adjustments ........................................................................................... 4-26

4-4. White Balance - Calibration .......................................................................................... 4-37

4-5. White Ratio (Balance) Adjustment ................................................................................ 4-39

4-6. Servicing Information .................................................................................................... 4-41

5. Exploded View & Part List ...................................................................................... 5-1

5-1. LA22B650T6M Exploded View ....................................................................................... 5-1

5-2. LA22B650T6M Parts List ................................................................................................ 5-3

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

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

6-2. Connector Functions ...................................................................................................... 6-4

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

GSPN (Global Service Partner Network)

Area Web Site

North America

Latin America

CIS http://cis.samsungportal.com

Europe http://europe.samsungportal.com

China http://china.samsungportal.com

Asia http://asia.samsungportal.com

Mideast & Africa

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.

http://service.samsungportal.com

http://latin.samsungportal.com

http://mea.samsungportal.com

© 2009 Samsung Electronics Co.,Ltd.
All rights reserved.

Printed in Korea
P/N: BN82-00653A-00

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 any circuitry.

1.

1-1-2. Servicing the LCD TV

When servicing the LCD TV, Disconnect the AC line cord from the AC outlet.

1.

It is essential that service technicians have an accurate voltage meter available at all times.

2.
Check the calibration of this meter periodically.

1-1-3. Fire and Shock Hazard

Before returning the LCD TV to the user, perform the following safety checks:

Inspect each lead dress to make certain that the leads are not pinched or that hardware is not lodged between the

1.
chassis and other metal parts in the LCD TV.

Inspect all protective devices such as nonmetallic control knobs, insulating materials, cabinet backs, adjustment and

2.
compartment covers or shields, isolation resistor capacitor networks, mechanical insulators, etc.

Leakage Current Hot Check (Figure 1-1):

3.
WARNING : Do not use an isolation transformer during this test.
Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI
C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit’s AC switch

4.

(READING SHOULD)
NOT BE ABOVE 0.5mA

DEVICE
UNDER
TEST

2-WIRE CORD

*ALSO TEST WITH

PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)

TEST ALL

EXPOSED METAL

SURFACES

LEAKAGE
CURRENT
TESTER

EARTH

GROUND

Figure 1-1. Leakage Current Test Circuit

rst in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit,

etc.) and all exposed metal parts, including: metal cabinets, screwheads and control shafts.
The current measured should not exceed 0.5 milliamp.
Reverse the power-plug prongs in the AC outlet and repeat the test.

1-1-4. Product Safety Notices

Some electrical and mechanical parts have special 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 identied by on schematics and parts lists. A substitute
replacement that does not have the same safety characteristics as the recommended replacement part might create

shock, re and/or other hazards. Product safety is under review continuously and new instructions are issued whenever

appropriate.

1-1

1-2

1. Precautions

1-2. Servicing Precautions

WARNING: An electrolytic capacitor installed with the wrong polarity might explode.
Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of

this manual.

Note:

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 mega ohm.

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.

If unforeseen circumstances create conict between the following servicing precautions and any of the

safety precautions, always follow the safety precautions.

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 eld-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 LCD TV.

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 sufcient 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 classied as “anti-static” can generate
electrical charges sufcient 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 oor can generate enough static electricity to damage an ESD.

1. Precautions

1-4. Installation Precautions

For safety reasons, more than a people are required for carrying the product.

1.

Keep the power cord away from any heat emitting devices, as a melted covering may cause re or electric shock.

2.

Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal

3.

temperature may cause re.

Bend the external antenna cable when connecting it to the product. This is a measure to protect it from being exposed

4.

to moisture. Otherwise, it may cause a re or electric shock.

Make sure to turn the power off and unplug the power cord from the outlet before repositioning the product. Also check

5.

the antenna cable or the external connectors if they are fully unplugged. Damage to the cord may cause re or electric

shock.

Keep the antenna far away from any high-voltage cables and install it rmly. Contact with the highvoltage cable or the

6.

antenna falling over may cause re or electric shock.

When installing the product, leave enough space (0.4m) between the product and the wall for ventilation purposes.

7.

A rise in temperature within the product may cause re.

1-3

1. Precautions

Memo

1-4

2. Product specications

2-1. Feature & Specications

Model LA22B650T6M

Feature

Digital-TV, RF, 2-HDMI, 2-Component, 1-A/V, 1-USB2.0, D-SUB

�

Brightness : 400cd/m

�

Contrast Ratio : 800:1

�

Response time : 5ms

�

Item Description

LCD Panel 22inch HD 60Hz

Scanning Frequency Horizontal : 60 kHz ~ 73 kHz (Automatic)

Display Colors 16.7M color

Maximum resolution Horizontal : 1366 Pixels

2

Specications

Vertical : 40 Hz ~ 75 Hz (Automatic)

Vertical : 768 Pixels

2. Product specications

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 82MHz

Active Display
Horizontal/Vertical 18.96 x 10.73 inches (481.5 (H) x 272.5 (V) mm)

AC power voltage & Frequency AC 110V ~ 220V, 60 Hz

Power Consumption Under 60W (Under 1W , Stand by)

Dimensions

Set (W x D x H)

Weight (Set) 11.24 lbs (5.1kg)_with stand

TV System Tuning Frequency Synthesize (Refer to detailed Frequency Table)

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

21.3 x 7.5 x 15.9 inchs (540.0 x 189.5 x 403.1 mm)_with stand

21.3 x 2.5 x 13.8 inchs (540.0 x 63.4 x 351.0 mm)_without stand

10.58 lbs (4.8kg)_without stand

System PAL, NTSC4.43, NTSC3.58, SECAM

Sound MONO, STEREO, NICAM, MPEG2, DOLBY

Operating Humidity: 10% to 80%, non-condensing
Storage Temperature: -20°C to 45°C (-4°F to 113°F)
Storage Humidity: 5% to 95%, non-condensing

Audio Spec. - MAX Internal Audio Output Power : Each 3W(Left/Right)

- Equalizer : 5band

- Output Frequency : RF : 20 Hz ~ 15.4 kHz
AV/Componet/HDMI : 20 Hz ~ 20 kHz

Note: Trusurround HD, Game Mode, Film Mode, Energy Saving

2-1

2. Product specications

2-2. Specication Comparison to Old Models

Model LB6T(LA22B650T6M) Jade(LN**A330J1DXZA)

Design

Display Type LCD TV LCD TV

Built-in Tuner O O

Resolution 1366 x 768 1680 X 1050

LCD Panel TFT LCD Panel 60Hz TFT LCD Panel 60Hz

Screen Size 22” 22”

Picture ratio 16 : 9 16 : 9

Dimensions (W x H x D) 22.0 x 17.2 x 8.5 inchs_with stand 24.2 x 17.4 x 9.1 inchs_with stand

Weight 14.33 lbs_with stand 16.5 lbs_with stand

Brightness 400 cd 400 cd

Contrast Ratio 800:1 800:1

Picture Enhacer DNIe (Saturn4) DNIe (FBE3)

Equalizer 5 band 5 band

Auto Volume Control O O

Surround Sound SRS TruSurround HD SRS TruSurround XT

Speaker Output 3W + 3W 3W + 3W

Caption O O

Energy Saving O O

Antenna 1 (Cable/Air) 1 (Cable/Air)

2-2

2-3. Accessories

Product Description Code. No Remark

2. Product specications

Remote Control & Batteries

(AAA x 2)

Power Cord 3903-000461

Stand Base BN96-11163A

Stand body BN96-10168B

Owner’s Instructions BN68-01029M

Cleaning Cloth BN63-01798B

BN59-00865A

Samsung Electronics

Service center

2-3

3. Disassembly and Reassembly

3. Disassembly and Reassembly

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

WARNING: This LCD TV contains electrostatically sensitive devices. Use caution when handling these components.

3-1. Disassembly and Reassembly (LA650)

Cautions: 1. Disconnect the LCD TV from the power source before disassembly.

2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.

Description Picture Description Screws

1. Place monitor face down on cushioned table.
Remove 4 screws from the stand.

2. Lift up the rear-cover.

3. Remove the left and right speaker.

4. Remove the 4screws of main board and
4 screws of IP board.

3-1

3. Disassembly and Reassembly

Description Picture Description Screws

5. Remove the 3 screws of panel’s BKLT.

6. Lift up the panel’s BKLT.

7. Lift up the panel.

Reassembly procedures are in the reverse order of disassembly procedures.

※

3-2

4. Troubleshooting

4-1. Troubleshooting

Check the various cable connections rst.

1.

• 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.

Check the power input to the Main Board.

2.

4. Troubleshooting

4-1

4. Troubleshooting

4-1-1. No Power

-

Symptom

Major

checkpoints

-

-

The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are
improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:

-

-

-

-

The LEDs on the front panel do not work when connecting the power cord.
The SMPS relay does not work when connecting the power cord.
The units appears to be dead.

Check the internal cable connection status inside the unit.
Check the fuses of each part.
Check the output voltage of SMPS.
Replace the Main Board.

Diagnostics

Lamp(Backlight) Off,

power indicator LED is on?

Yes

Does proper Stand-By DC

A5V, A13V appear at CN1001?

Yes

Does proper Main DC B5V

appear at IC1002?

Yes

Does proper DC A3.3V

appear at IC1009?

Yes

Does proper DC B3.3V, A1.2V,

DDR1.9V appear at

IC1004, IC2004?

Yes

Change the LVDS Cable

BN96-07252B

Lamp(Backlight) on, no video

No

No

No

No

No

No

Check a connetion power code.

Change Main Power Assy

BN44-00232A

Change the Main Assy

BN94-02990A

Check a other function

(No picture part)

4-2

Caution

Make sure to disconnect the power before working on the IP board.

4. Troubleshooting

4-3

4. Troubleshooting

4-1-2. No Video (Analog PC signal)

Symptom Audio is normal but no picture is displayed on the screen.-

Check the PC source

Major

checkpoints

-

Check MSD237HCG.

-

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

-

Diagnostics

Power indicator LED is off.

Lamp(Backlight) on, no video?

Yes

Check the PC source and

check the connection of D-SUB?

Yes

1

2

Does the signal appear at

IC4010?

Yes

Does the digital data appear at

CN109 (LVDS Data clk)

of LVDS connector?

Yes

Check the LVDS cable?

Replace the LCD panel?

No

No

No

No

No

Check a set in the

‘Stand-by mode’ or ‘DPMS mode’.

Input the analog

PC signal properly.

Check CN5001, PC cable.

Change the Main Assy

BN94-02572B

Check IC4010 (Saturn4)

Change the Main Assy

BN94-02990A

Please, Contact Tech support.

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

4-4

4. Troubleshooting

4-5

4. Troubleshooting

WAVEFORMS

1

2

PC input (V-sink , H-sink , R/G/B )

LVDS output

4-6

4-1-3. No video (HDMI - Digital signal)

Symptom Audio is normal but no picture is displayed on the screen.-

Check the HDMI source

Major

checkpoints

-

Check the MSD237HCG.

-

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

-

4. Troubleshooting

Diagnostics

Power Indicator is off.

Lamp(Backlight) Off, no video?

Yes

Check the HDMI source and check

the connection of HDMI cable?

Yes

Does the signal appear at

3

2

CN6009 (Pin#12 , #7 )(HDMI1)

(HDMI RX_Clk , RX_Data)?

Yes

Does the digital data appear at

CN109 (LVDS Data clk)

of LVDS connector?

Yes

Check the LVDS cable?

Replace the LCD panel?

No

No

No

No

No

Check a set

in the ‘Stand-by mode’.

Input the HDMI signal properly

Check CN6009

Check HDMI cable

Change the Main Assy

BN94-02990A

Check IC4010 (Saturn4)

Change the Main Assy

BN94-02990A

Please, Contact Tech support

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

4-7

4. Troubleshooting

4-8

WAVEFORMS

4. Troubleshooting

3

2

HDMI input (RX_Data, RX_Clk)

LVDS output

4-9

4. Troubleshooting

4-1-4. No Video (Tuner_CVBS)

Symptom Audio is normal but no picture is displayed on the screen.-

Check the Tuner CVBS source

Major

checkpoints

-

Check the MSD237HCG.

-

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

-

Diagnostics

Power indicator LED is off.

Lamp(Backlight) on, no video?

Yes

Check the RF source and

check the connection of RF cable?

Yes

Does the DC TU5V_PW, TU33V_PW

appear at #3, #5 Pin of Tuner?

Yes

4

2

Does the CVBS data appear at

#9 pin of Tuner?

Yes

Does the digital data appear at

CN109 (LVDS Data clk)

of LVDS connector?

Yes

No

No

No

No

No

Check a set

in the ‘Stand-by mode’.

Input the RF source properly.

Change the Main Assy

BN94-02990A

Check Tuner

Change the Main Assy

BN94-02990A

Check IC4010 (Saturn4)

Change the Main Assy

BN94-02990A

Check the LVDS cable?

Replace the LCD panel?

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

No

4-10

Please, Contact Tech support

4. Troubleshooting

4-11

4. Troubleshooting

WAVEFORMS

CVBS OUT (Grey Bar)

4

LVDS output

2

4-12

4-1-5. No Video (Tuner DTV)

Symptom Audio is normal but no picture is displayed on the screen.-

Check the DTV source

Major

checkpoints

-

Check the MSD237HCG.

-

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

-

4. Troubleshooting

Diagnostics

Power indicator LED is off.

Lamp(Backlight) on, no video?

Yes

Check the connection of RF cable?

Yes

Check the ‘signal strength’

in Self Diagnosis menu

Strength is enough?

Yes

Does the DC TU5V_PW, TU33V_PW

appear at #3, #5 Pin of Tuner?

Yes

Does the digital data appear at

2

CN109 (LVDS Data clk)

of LVDS connector?

Yes

Check the LVDS cable?

Replace the LCD panel?

No

No

No

No

No

No

Check a set

in the ‘Stand-by mode’.

Input the RF cable properly.

Check the D-TV source.

Change the Main Assy

BN94-02990A

Check IC4010 (Saturn4)

Change the Main Assy

BN94-02990A

Please, Contact Tech support

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

4-13

4. Troubleshooting

4-14

WAVEFORMS

4. Troubleshooting

2

LVDS output

4-15

4. Troubleshooting

4-1-6. No Video (Video CVBS)

Symptom Audio is normal but no picture is displayed on the screen.-

Check the Video CVBS source

Major

checkpoints

-

Check the MSD237HCG.

-

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

-

Power indicator LED is off.

Lamp(Backlight) on, no video?

Yes

Diagnostics

4

2

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

Check the video source and

check the connection of video cable?

Yes

Does the CVBS data appear at

CN7005?

Yes

Does the digital data appear at

CN109 (LVDS Data clk)

of LVDS connector?

Yes

Check the LVDS cable?

Replace the LCD panel?

No

No

No

No

No

Check a set

in the ‘Stand-by mode’.

Input the video source properly.

Check CN7005

Change the Main Assy

BN94-02990A

Check IC4010 (Saturn4)

Change the Main Assy

BN94-02990A

Please, Contact Tech support

4-16

4. Troubleshooting

4-17