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

TFT-LCD TV

Chassis GSM27SE

GSM32SE
GSM37SE
GSM40SE

Model LE27S71B

LE32S71B
LE37S71B
LE40S71B

Manual

SERVICE

TFT-LCD TV Fashion Feature

- Luxurious Slim Design

- Supreme Picture Quality

- Supreme Sound Quality

- Supreme Convenience Quality

- Convenience for Users

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/

- This Service Manual is a property of
Samsung Electronics Co., Ltd.
Any unauthorized use of Manual can be
punished under applicable International
and/or domestic law.

1 Precautions

1-1

1-1-1 Warnings

1. For continued safety, do not attempt to modify the
circuit board.

2. Disconnect the AC power and DC Power Jack before
servicing.

1-1-2 Ser vicing the LCD Monitor

1. When servicing the LCD Monitor Disconnect the AC
line cord from the AC outlet.

2. It is essential that service technicians have an accurate
voltage meter available at all times. Check the
calibration of this meter periodically.

1-1-3 Fire and Shock Hazard

Before returning the monitor to the user, perform the
following safety checks:

1. Inspect each lead dress to make certain that the leads
are not pinched or that hardware is not lodged between
the chassis and other metal parts in the monitor.

2. Inspect all protective devices such as nonmetallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields,
isolation 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 Precautions

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

1-1 Safety Precautions

1 Precautions

1-2

1-2-1 General Ser vicing

Precautions

1. Always unplug the units AC power cord from the AC
power source and disconnect the DC Power Jack
before attempting to:
(a) remove or reinstall any component or assembly, (b)
disconnect PCB plugs or connectors, (c) connect a test
component in parallel with an electrolytic capacitor.

2. Some components are raised above the printed circuit
board for safety. An insulation tube or tape is
sometimes used. The internal wiring is sometimes
clamped to prevent contact with thermally hot
components. Reinstall all such elements to their
original position.

3. After servicing, always check that the screws,
components and wiring have been correctly
reinstalled. Make sure that the area around the
serviced part has not been damaged.

1. Immediately before handling any semiconductor
components or assemblies, drain the electrostatic
charge from your body by touching a known earth
ground. Alternatively, wear a discharging wrist-strap
device. To avoid a shock hazard, be sure to remove the
wrist strap before applying power to the monitor.

2. After removing an ESD-equipped assembly, place it
on a conductive surface such as aluminum foil to
prevent accumulation of an electrostatic charge.

3. Do not use freon-propelled chemicals. These can
generate electrical charges sufficient to damage ESDs.

4. Use only a grounded-tip soldering iron to solder or
desolder ESDs.

5. Use only an anti-static solder removal device. Some
solder removal devices not classified as anti-static
can generate electrical charges sufficient to damage
ESDs.

4. Check the insulation between the blades of the AC
plug and accessible conductive parts (examples: metal
panels, input terminals and earphone jacks).

5. Insulation Checking Procedure: Disconnect the power
cord from the AC source and turn the power switch
ON. Connect an insulation resistance meter (500 V) to
the blades of the AC plug.

The insulation resistance between each blade of the
AC plug and accessible conductive parts (see above)
should be greater than 1 megohm.

6. Always connect a test instruments ground lead to the
instrument chassis ground before connecting the
positive lead; always remove the instruments ground
lead last.

6. Do not remove a replacement ESD from its protective
package until you are ready to install it. Most
replacement ESDs are packaged with leads that are
electrically shorted together by conductive foam,
aluminum foil or other conductive materials.

7. Immediately before removing the protective material
from the leads of a replacement ESD, touch the
protective material to the chassis or circuit assembly
into which the device will be installed.

Caution: Be sure no power is applied to

the chassis or circuit and
observe all other safety
precautions.

8. Minimize body motions when handling unpackaged
replacement ESDs. Motions such as brushing clothes
together, or lifting your foot from a carpeted floor can
generate enough static electricity to damage an ESD.

1-3 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.

1-2 Ser vicing Precautions

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

Precautions section of this manual.

Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety

precautions, always follow the safety precautions.

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

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

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

4. Bend the external antenna cable when connecting
it to the product. This is a measure to protect it
from being exposed to moisture. Otherwise, it
may cause a fire or electric shock.

5. Make sure to turn the power off and unplug the
power cord from the outlet before repositioning
the product. Also check the antenna cable or the
external connectors if they are fully unplugged.
Damage to the cord may cause fire or electric
shock.

6. Keep the antenna far away from any high-voltage
cables and install it firmly. Contact with the high­voltage cable or the antenna falling over may
cause fire or electric shock.

7. When installing the product, leave enough space
(10cm) between the product and the wall for
ventilation purposes.
A rise in temperature within the product may
cause fire.

1 Precautions

1-3

1-4 Installation Precautions

Memo

1 Precautions

1-4

2 Product Specifications

2-1

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.

2-2 LE27S71B Specifications

LCD Panel

LCD Panel : TFT-LCD Panel, RGB Vertical stripe, normaly black, 27-Inch viewable, 0.1455(H)*0.4365(V)mm Pixel Pitch

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 Product Specifications

2-2

Item

Description

2 Product Specifications

2-3

2-3

LE32S71B Specifications

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

Item

Description

2 Product Specifications

2-4

2-4 LE37S71B Specifications

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

Item

Description

2 Product Specifications

2-5

2-5

LE40S71B Specifications

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

Item

Description

2 Product Specifications

2-6

2-6 Spec Comparison

LE26R51B / LE32R51B / LE40R51BModel

Design

Frequency

Horizontal
Vertical
Display Color

30 ~ 61 kHz

60 ~ 75 Hz

16,777,216 colors

30 ~ 61 kHz

60 ~ 75 Hz

16,777,216 colors

PC Resolution

Maximum mode

Input Signal

Sync Signal
Video Signal

Power
Consumption

Normal
Power Saving

140W / 184W / 285W

< 1W

100W / 152W / 170W / 205W

< 1W

H/V Separate, TTL, P. or N.

0.7 Vp-p @ 75ohm

H/V Separate, TTL, P. or N.

0.7 Vp-p @ 75ohm

WXGA, 1360 x 768 @ 60 Hz WXGA, 1360 x 768 @ 60 Hz

LE27S71B / LE32S71B /

LE37S71B / LE40S71B

2 Product Specifications

2-7

2-7 Option Specification

Item Item Name

Remote Control

&

Batteries (AAA x 2)

Power Cord

Cleaning Cloth

Owner's

Instructions

Stand

Cover-Bottom

BN59-00507A

3903-000042

BN63-001798A

BN68-00983A

27" : BN90-01005A
32" : BN90-00967A
37" : BN90-00966A
40" : BN90-00966A

27" : BN63-02415B
32" : BN63-02415B
37" : BN63-02416B
40" : BN63-02416B

Code.No Remark

Memo

2 Product Specifications

2-8

3 Alignments and Adjustments

3-1

3 Alignments and Adjustments

3-1 Ser vice Instr uction

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 Alignments and Adjustments

3-2

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

- 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

If Panel Mark is "A", Set the factory mode
indicating as follows.

Panel BOM(Bill of material) : BN07-00289A
Connector between Panel and Power Unit
: BN39-00603M (300mm)

* Option Byte

1. Gamma "AUO"

2. Panel Option "AUO"

If Panel Mark is "S" or not printed.
Set the factory mode indicating as follows.

Panel BOM(Bill of material) : BN07-00247A
Connector between Panel and Power Unit
: BN39-00603M (300mm)
* Option Byte

1. Gamma "AMLCD"

2. Panel Option "AMLCD_INT"
If Panel Mark is "C" , Set the Factory mode
indicating as follows.
Panel BOM(Bill of Material) : BN07-00207A
Connecotor between Panel and Powe Unit :
BN39-00659A(200mm)
* Option Byte

1. Gamma " CMO "

2. Panel Option " CMO "

Others are same shown below.

PANEL MAKER

INFO

MENU MUTE

3 Alignments and Adjustments

3-3

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 Alignments and Adjustments

3-4

3 Alignments and Adjustments

3-5

3 Alignments and Adjustments

3-6

3-4 Ser vice 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

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

Toshiba Patten

[ 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

( chess patten )

3 Alignments and Adjustments

3-7

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.

* 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.

Picture 4-2 Toshiba ABL Pattern

Low light
Measurement point

3 Alignments and Adjustments

3-8

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 Alignments and Adjustments

3-9

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.

Memo

3 Alignments and Adjustments

3-10

4 Troubleshooting

4-1

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 SMPS Main Board, between the SMPS

INVERTER Board, and between the Main LVDS Boards.

4 Troubleshooting

4-2

4-2-1 No Power

4-2 Checkpoints by Error Mode

Does proper DC 12V

appear at CN800?

Change a Assy PCB Power.

Yes

Yes

No

Check a connection a power cable.

No

Does proper DC A3.3V,

A5V appear at

C854, C866?

Check a IC809, IC802.

Change a main PCB ass'y.

Yes

No

Does proper DC 5V, 3.3V,

1.8V appear at C811, C853,
C833?

Check a IC803, IC805, IC813, IC307.

Change a main PCB ass'y

Yes

A power is supplied to set?

Check a other function.

(No picture part)

Replace a lcd panel.

No

No

LAMP off, power indicator

LED red color?

4 Troubleshooting

4-3

4-2-2 No Video (Analog PC)

Check a PC source and check

the connection of DSUB cable?

Input a analog PC signal and

connected cable(DPMS).

Yes

Does the signal appear at

#30, 22, 38(R, G, B) of IC500?

PC cable. Change a PC

cable. Change a main PCB ass'y.

Yes

Power Indicator is off.

Lamp on, no video.

No

No

1

Does the digital data appear

at the output of

LVDS (R563_OP~R572_OP)?

Check a IC500

Change a main PCB ass'y.

Yes

Check a LVDS cable?

Replace a lcd panel?

Please, Call to Samsung Co. LTD.

Yes

No

No

4 Troubleshooting

4-4

WAVEFORMS

1

R,G,B Output Signal of IC500

4 Troubleshooting

4-5

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

Check the connection

of HDMI cable?

Input a HDMI cable.

Yes

Does the digital data appear at

R503~R510?

Check a a IC 500

Change a main PCB ass'y.

Yes

Does the digital data

appear at output of IC500

LVDS(R563_OP~R572_OP)?

Check a IC500

Change a main PCB ass'y.

Yes

Check a LVDS cable?

Replace lcd panel?

Please, Call to Samsung Co. LTD.

Yes

Power Indicator is off.

Lamp on, no video.

No

No

No

No

3

2

4 Troubleshooting

4-6

2

Digital Output Data of IC500

3

Signal of HDMI(Data)