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LED TV
Chassis : U8JA
Model : UN40HU6950F
UN50HU6950F
UN55HU6950F
SERVICE Manual
LED TV Contents
1. Precautions
2. Product specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Wiring Diagram
UN**HU6950F
Contents
1. Precautions ...................................................................................................................1-1
1-1. Safety Precautions ..............................................................................................................1-1
1-1-1. Warnings...................................................................................................................1-1
1-1-2. Servicing the LED TV ...............................................................................................1-1
1-1-3. Fire and Shock Hazard .............................................................................................1-1
1-1-4. Product Safety Notices .............................................................................................1-2
1-2. Servicing Precautions ..........................................................................................................1-3
1-2-1. General Servicing Precautions .................................................................................1-3
1-3. Static Electricity Precautions ...............................................................................................1-4
1-4. Installation Precautions .......................................................................................................1-5
2. Product Specifications.................................................................................................2-1
2-1. Product information .............................................................................................................2-1
2-2. Product specification ...........................................................................................................2-2
2-2-1. Detailed Specifications .............................................................................................2-2
2-2-2. Feature & Specifications ...........................................................................................2-6
2-3. Accessories .........................................................................................................................2-7
2-4. Viewing the Functions .........................................................................................................2-8
3. Disassembly and Reassembly ....................................................................................3-1
3-1. Disassembly and Reassembly ............................................................................................3-1
4. Troubleshooting ...........................................................................................................4-1
4-1. Troubleshooting ...................................................................................................................4-1
4-1-1. Previous Check ........................................................................................................4-1
4-1-2. Simple flow chart of malfunction ...............................................................................4-3
4-2. How to Check Fault Symptom .............................................................................................4-4
4-2-1. NO Power .................................................................................................................4-4
4-2-2. No Video (HDMI 1, 2, 3, 4 - Digital Signal) ...............................................................4-7
4-2-3. No Video (Tuner_CVBS) ........................................................................................4-10
4-2-4. No Video (Tuner DTV) ............................................................................................4-13
4-2-5. No Video (Video AV) ...............................................................................................4-16
4-2-6. No Video (COMPONENT) ......................................................................................4-19
4-2-7. No Sound (1.Speaker 2.Monitor_out 3.Optical)_NT14U ....................................4-22
4-3. Factory Mode Adjustments ................................................................................................4-25
4-3-1. Detail Factory Option ..............................................................................................4-25
4-3-2. Entering Factory Mode ...........................................................................................4-26
4-3-3. Factory Data ...........................................................................................................4-27
4-4. White Balance ...................................................................................................................4-43
4-4-1. Calibration ..............................................................................................................4-43
4-4-2. Service Adjustment .................................................................................................4-43
4-4-3. Adjustment ..............................................................................................................4-44
4-5. RS-232C ............................................................................................................................4-45
4-6. AV Control Tabe .................................................................................................................4-46
4-7. Software Upgrade..............................................................................................................4-52
4-7-1. How to Check the Software Version .......................................................................4-52
4-7-2. How to Upgade Software ........................................................................................4-53
5. Wiring Diagram .............................................................................................................5-1
5-1. Wiring Diagram ....................................................................................................................5-1
5-2. Connector ............................................................................................................................5-2
5-3. Connector Functions ...........................................................................................................5-5
This Service Manual is a property of Samsung Electronics Co.,Ltd. © 2014 Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable All rights reserved.
International and/or domestic law.
Printed in Korea
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.
Disconnect the AC power and DC power jack before servicing.
WARNING
1-1-2. Servicing the LED TV
1. When servicing the LED TV, 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 ADAPTER EARTH
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
Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL
WARNING 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
1. Precautions
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.
1-2
1. Precautions
1-2. Servicing Precautions
An electrolytic capacitor installed with the wrong polarity might explode.
WARNING
Before servicing units covered by this service manual, read and follow the Safety Precautions section of
this manual.
CAUTION
If unforeseen circumstances create conflict between the following servicing precautions and any of the
safety precautions, always follow the safety precautions.
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 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.
1-3
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.
1-4
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 dispose of used batteries according to
the instructions.
· Do not dispose of batteries in a fire.
· Do not short circuit, disassemble or overheat the batteries.
CAUTION · Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent
type.
· Do not be exposed to excessive heat such as sunshine, fire or the like.
1-5
2. Product specifications
2. Product Specifications
2-1. Product information
Model UN**HU6950F
W
Front View H
* W : Width H : High D : Depth D
Detail View
Front Color Clear / Black
Body 916.9 X 538.4 X 68.4 mm
40"
With stand 916.9 X 585.9 X 258.0 mm
Dimensions Body 1127.9 X 657.2 X 69.0 mm
50"
(W x H x D) With stand 1127.9 X 703.1 X 275.1 mm
Body 1239.7 X 719.2 X 69.0 mm
55"
With stand 1239.7 X 765.0 X 275.1 mm
Body 8.7 kg
40"
With stand 11.4 kg
Body 14.0 kg
Weight 50"
With stand 17.0 kg
Body 16.8 kg
55"
With stand 19.8 kg
Panel Type Black
Internal Memory 4GB
DDR 2GB
Instant On, TTS/Zoom, History Digital Clean View, PIP, USB HID,
Feature
TV soundConnect, One Connect (Ready)
2-1
2. Product specifications
2-2. Product specification
2-2-1. Detailed Specifications
NOTE
Design and specifications are subject to change without prior notice.
Item UN**HU6950FXZA
General Information Product LED
Series 6
Country UNITED STATES
Display Inch 40" / 50" / 55"
Resolution 3,840 x 2,160
Ultra Clear Panel Yes
Video Clear Motion Rate 240
Micro Dimming Micro Dimming Pro
Precision Black (Local Dimming) N/A
Wide Color Enhancer (Plus) Yes
Color Accuracy N/A
Auto Depth Enhancer N/A
Auto Motion Plus 60HzHz
Film Mode Yes
Audio Dolby MS10 / MS110 MS11
DTS Studio Sound / DNSe+ DTS Studio Sound
DTS Premium Sound / DTS Premium Sound 5.1 DTS Premium Sound 5.1
3D Sound N/A
Auto Volume Leveler Yes
Sound Customizer No
Sound Output (RMS) 20W (Left 10W, Right 10W)
Speaker Type Down Firing
Woofer N/A
HD Audio N/A
Smart TV Smart Hub Yes
Samsung SMART TV Yes
On TV Yes
Movies & TV Shows Yes
Multimedia Yes
Apps Yes
Game Yes(US)
Multi-Screen (Dual / Quad Screen) Quad
Web Browser Yes
2-2
2. Product specifications
Item UN**HU6950FXZA
Smart Interaction Voice Interaction Yes
Camera Built-in N/A
Motion control Ready
Smart Convergence Contents Streaming Yes
Screen Mirroring Yes
ISP Bound Service No
RUI No
RVU Yes (US Only, DIRECTV Ready)
Samsung SMART View Yes
Smart Home Yes
Tuner/Broadcasting DTV Tuner ATSC / Clear QAM
Analog Tuner Yes
Connectivity HDMI 4 (HDMI 2.0 / HDCP2.2)
USB 3
Component In (Y/Pb/Pr) 1
Composite In (AV) 2(1Common Use for Component Y)
Ethernet (LAN) Yes
Headphone No
Audio Out (Mini Jack) Yes
Digital Audio Out (Optical) 1
PC In (D-sub) N/A
PC/DVI Audio In (Mini Jack) N/A
RF In (Terrestrial / Cable input) 1/1(Common Use for Terrestrial)/0
Ex-Link ( RS-232C ) 1
One Connect (Jack) Yes
WiFi Direct Yes
MHL Yes
HDMI 1.4 3D Auto Setting N/A
HDMI 1.4 A/Return Ch. Support Yes
Wireless LAN Built-in Yes
Anynet+ (HDMI-CEC) Yes
Design Design T-shape
Bezel Type NNB
Light Effect (Deco) N/A
Stand Type T-Shape
Swivel (Left/Right) No
Camera Type N/A
Additional Feature Samsung 3D N/A
2-3
2. Product specifications
Item UN**HU6950FXZA
Additional Feature 3D Converter N/A
Instant On Yes
Quad Core+ No
Digital Clean View Yes
Auto Channel Search Yes
Auto Power Off Yes
Clock&On/Off Timer Yes
Sleep Timer Yes
BD Wise Plus Yes
Caption (Subtitle) Yes
AC/DC TV N/A
Embeded POP Yes
EPG Yes
Game Mode Yes
History N/A
IP Video Closed Caption Yes
OSD Language English, Spanish, French
Picture-In-Picture Yes
Multi Tasking Yes
BT HID Built-in Yes
USB HID Support Yes
Smart Evolution Support Yes
TV SoundConnect Yes
Teletext (TTXT) No
Time Shift No
V-Chip Yes
Eco Feature Eco Label N/A
Eco Sensor Yes
Accessory 3D Active Glasses (Included) N/A
Remote Controller Model TM1460A
Batteries (for Remote Control) Yes
Samsung Smart Touch Control (Included) Yes
Ultra Slim Wall Mount Supported Yes
Mini Wall Mount Supported Yes
Vesa Wall Mount Supported Yes
IR Extender Cable (Included) Yes
Wireless Keyboard (Included) No
User Manual Yes
2-4
2. Product specifications
Item UN**HU6950FXZA
Accessory E-Manual Yes
Power Cable Yes
Slim Gender Cable N/A
2-5
2. Product specifications
2-2-2. Feature & Specifications
Feature
· Digital-TV, RF, 4-HDMI, 1-Component,1-A/V, 3-USB (2-USB 2.0, 1-USB3.0) : Media Play, LAN, WIFI
· PIP(in HDMI 1, 2, 3, 4 Component and Sub picture is available only in TV mode(DTV/ATV))
· CMR 240
· Dolby MS11, DTS Premium Sound 5.1, DTS Studio Sound
Specifications
Model UN**HU6950F
Item Description
Screen Size (Diagonal) 40 inch 50 inch 55 inch
LCD Panel UHD 60Hz
Scanning Frequency Horizontal : 60 kHz ~ 136 kHz
Vertical : 56 Hz ~ 75 Hz
Display Resolution 3840 X 2160
Input Signal Analog 0.7 Vp-p ± 5% positive at 75 , internally terminated
Input Sync Signal H/V Separate, TTL, P. or N.
Maximum Pixel Clock Rate 138 MHz
AC Power Voltage & Frequency AC110-120V 50/60Hz
Environmental Considerations Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)
Operating Humidity : 10% ~ 80%, non-condensing
Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)
Storage Humidity : 5% ~ 95%, non-condensing
Sound (Output) 10W X 2
Note : AllShare, SMART Guide, Web Browser, USB HID, IR Blaster, Smart Control
2-6
2. Product specifications
2-3. Accessories
NOTE
· The items' colors and shapes may vary depending on the model.
· Cables not included in the package contents can be purchased separately.
· The part code for some accessories may differ depending on your region.
Product Code. No Product Code. No
· Samsung Smart Control BN59-01185F · Power Cord 3903-000853
· Batteries (AA x 2) 4301-000101 · User Manual BN68-06501A
Image Product Code. No
· IR Extender Cable BN96-31644A
2-7
2. Product specifications
2-4. Viewing the Functions
Samsung Smart Control
Microphone: Use the microphone with the Voice
Control and Voice functions.
· The Voice Control function can be affected
by unclear pronunciation, voice level, or
MUTE: Cuts off the sound surrounding noise.
temporarily.
Turns the TV on and off.
SEARCH: Launches the Search function.
MIC KEYPAD: Displays the On-Screen Remote. See the
e-Manual chapter, Using the Remote Control and
Peripherals > Using the Samsung Smart Control >
TV
Displaying and Using the On-Screen Remote.
SOURCE: Displays and lets you select video sources.
SEARCH KEYPAD SOURCE
VOICE: Takes your voice commands and lets you
enter text using your voice.
VOL VOICE CH
Changes channels.
Adjusts the volume.
Touch pad
Place a finger on the touch pad and move the
Samsung Smart Control. The pointer on the screen
moves in the direction you moved the Samsung
Smart Control.
RETURN
EXIT
GUIDE
CH.LIST Press the touch pad to run the focused item.
SMART HUB
Press and hold the touch pad to display the Context-
Sensitive Menus.
: Moves the cursor, selects the on-screen
P.SIZE MTS CC INFO
menu items, and changes the values seen on the
TV's menu.
MENU M.SCREEN
RETURN: Returns to the previous menu.
SMART HUB: Brings up Smart Hub applications. See
the e-Manual chapter, Smart Features > Smart Hub.
· To exit an application quickly, press the button.
GUIDE: Displays the EPG (Electronic Program Guide).
Use these buttons with a specific feature and
according to the directions on the TV's screen.
MENU: Displays the menu on the screen.
M.SCREEN: You can split the TV screen and enjoy multiple activities - such as watching
TV, surfing the web, and watching a video - all at the same time.
P.SIZE: Lets you choose the picture size.
MTS: Press to choose stereo, mono, or Separate Audio Program (SAP broadcast).
CC: Controls the caption decoder and displays captions on the screen.
INFO: Displays information on the TV screen.
2-8
3. Disassembly and Reassemble
3. Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the LED TV.
This UHD TV contains electrostatically sensitive devices. Use caution when handling these components.
WARNING
3-1. Disassembly and Reassembly
1. Disconnect the UHD TV from the power source before disassembly.
2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.
CAUTION 3. If there is no additional coment, it is same for all inches.
40" / 50" / 55"
Description Picture Description Screws
1 Remove screws from the Stand.
Remove stand. Torque :
9~11Kgf.cm.
6003-001208
3-1
3. Disassembly and Reassemble
Description Picture Description Screws
2 Remove the screws of rear-cover.
(In this step, Two types of screws are
Torque :
7~8Kgf.cm.
used.)
· 40" : 11EA / 2EA
· 50" : 16EA / 2EA
· 55" : 16EA / 2EA 6001-002755
Torque :
9~11Kgf.cm.
6003-001782
3 Remove the Main Board and the Power
Board.
NOTE
Applied to Double locking.
1. Flip up the locking tab on top of the
connector.
2. Squeeze the edge of the connector
to release the second tab lock and
gently pull the connector away.
3-2
3. Disassembly and Reassemble
Description Picture Description Screws
4 Remove the screws of main board. Torque :
7~8Kgf.cm
6001-003016
Remove the screws of IP board.
Remove the IP board.
5 Remove the BT Module.
3-3
3. Disassembly and Reassemble
Description Picture Description Screws
6 Remove the Wi-Fi module.
7 Remove the Speakers.(R/L)
8 Remove the screws of T-con.
Torque :
7~8Kgf.cm
T-con Board
6001-003016
Unlock the locking of T-con cable.
3-4
3. Disassembly and Reassemble
Description Picture Description Screws
9 Completed disassembly.
· Panel
NOTE
Reassembly procedures are in the reverse order of disassembly procedures.
3-5
4. Troubleshooting
4. Troubleshooting
4-1. Troubleshooting
4-1-1. 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.
Main Board Power Board
Power Cable
LVDS Cable
T-con Board
Speaker
3. How to distinguish if the problem is caused by Main Board or T CON
- No Video
If the problem is No Video but BLU is on and Indication LED is blinking repeatedly and faster than nomal booting,
replace the T-CON board.
- Distorted Picture
Check the inner patterns.
· For All mode
NT14U NT72323BG FRC Picture Problem
OK OK NG Main Board or Signal Source
NG OK NG Main Board
NG NG NG Main Board or LVDS cable or T CON or Panel
· Only for HDMI mode (additional check)
HDMI Picture Problem
OK NG There is no problems after HDMI IC check HDMI source or HDMI jack.
NG NG There is no problems before HDMI IC check X12 pattern or LVDS cable or T CON
4-1
4. Troubleshooting
How to check inner pattern?
1. Enter the service mode Choose `SVC' Check the `internal pattern.'
2. Enter `Service Mode.'
- If you do not have Factory remote control
Power OFF INFO MENU MUTE Power On
- If you have Factory remote control
INFO Factory
3. Choose `SVC Test pattern'.
Option
Control
Debug
SVC Test Pattern Test Pattern Sel.
ADC/WB
Advanced
4. Check inner patterns.
4-2
4. Troubleshooting
4-1-2. Simple flow chart of malfunction
Does the TV turn Yes
on?
No
Can you see Yes
anything on the
screen?
No
Can you see Yes
OSD menu running
on the screen?
No
Can you see Digital
Check LVDS cable Channel broadcast ?
Check the Power Cord. connected to Main Board.
If necessary, replace the
Main Board.
No
Yes
Replace the Main Board.
Check the LVDS
Is any sound of Yes Cable connected. No
TV when RF signal Change the Main Board.
If necessary replace the
connected? T-CON Board.
No
A5V appear at No Check 24p Cable.
the pin 4 of CN201? If necessary, replace the
SMPS Board.
Yes
B13V appear at No
the pin 11, 12, 13 of Change the Main Board.
CN201?
Yes
Please, contact Tech
support.
4-3
4. Troubleshooting
4-2. How to Check Fault Symptom
4-2-1. NO Power
Note
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
· The LEDs on The front panel do not work when connecting The power cord.
Symptom · The SMPS relay does not work when connecting The power cord.
· The units appears to be dead.
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:
Major · Check the internal cable connection status inside the unit.
checkpoints · Check the fuses of each part.
· Check the output voltage of SMPS.
· Replace the Main Board.
Power indicator LED is on? No Check the power cord connection.
Yes
Check the backlight on,
No
when 24p cable unconnected ?
Yes
Check `Stand-By 5V' ?
No
- BD213 : A5.3V Replace 24p Power Cable.
Yes Replace Main Power Ass'y.
Check `Power input of Main Ass'y' ?
- BD206~BD208 : B13VS
No
- BD200~BD205 : B13V
Diagnostics
- BD228 : B5V
Yes
Check `Power IC output of Main Ass'y' ?
- IC209 : A3.3V
- BD2208~BD2212 : B2.5V /
L204 : B5V No Change the Main Ass'y.
- BD1900, BD2206 : B3.3V /
BD2203~BD2205 : B1.5V
- BD2214~BD2216 : B1.12V
Yes
Check Input power of `T CON Board' ? Reconnect or Change.
No
- F1(T-CON) : PANEL_13V_PW the LVDS cable.
4-4
4. Troubleshooting
Yes
Check Power of `T CON Board'.
- CD220(T-CON) : VIN_12V No Change the T CON Board.
Diagnostics - BT1(T-CON) : VCC_1.15V
Yes
Please, Contact tech support.
Caution Make sure to disconnect the power before working on the IP Board.
4-5
4. Troubleshooting
Location of Parts
Main Board_Front
A B
C
D
Detail
BD228 : B5V
IC209 : A3.3V
BD206~BD208: B13VS
A B
BD200~BD205: B13V
BD213 : A5.3V
L204 : B5V
BD2203 : B1.5V
C D
BD2208~BD2212: B2.5V
BD1900 : B3.3V
BD2214 : B1.12V
4-6
4. Troubleshooting
4-2-2. No Video (HDMI 1, 2, 3, 4 - Digital Signal)
Note
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
Symptom · Audio is normal but no picture is displayed on the screen.
· Check the HDMI source.
Major · Check the HDMI switch.
checkpoints · This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
Power indicator LED is off.
No Check a set in the `Stand-by mode'.
Lamp(Backlight) on, no video ?
Yes
Check the HDMI source and check the
No Input the HDMI signal properly.
connection of HDMI cable ?
Yes
Check the signal at Input of Main Board ?
- HDMI1 Clk
Pin #10, #12 of CN801
· DATA
Pin #7, #9, #4, #6, #1, #3 of
CN801
- HDMI2 Clk
Pin #10, #12 of CN701
Check CN700,701,800,801
· DATA
Check HDMI cable.
Pin #7, #9, #4, #6, #1, #3 of
Change the Main Ass'y
1 CN701 No
or
Diagnostics - HDMI3 Clk Check IC1400(NT14U).
Pin #10, #12 of CN700 Change the Main Ass'y.
· DATA
Pin #7, #9, #4, #6, #1, #3 of
CN700
- HDMI4 Clk
Pin #10, #12 of CN800
· DATA
Pin #7, #9, #4, #6, #1, #3 of
CN800
Yes
Check the Vby1 signal at output of
Main board.(TX) Check IC1400(NT14U).
2 No
- TX6_CLK : TCON SDA Change the Main Ass'y.
- TX8_DATA : TCON SCL
Yes
Check the LVDS cable?
No Please, Contact tech support.
Replace the T CON / LCD panel?
Caution Make sure to disconnect the power before working on the IP Board.
4-7
4. Troubleshooting
Location of Parts
Main Board_Front
A
B
Detail
CN700 : HDMI3
CN800 : HDMI4
A CN701 : HDMI2 B
CN801 : HDMI1
4-8
4. Troubleshooting
Waveforms
1 HDMI input (RX_Data, RX_Clk) 2 LVDS output
4-9
4. Troubleshooting
4-2-3. No Video (Tuner_CVBS)
Note
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
Symptom · Audio is normal but no picture is displayed on the screen.
· Check the Tuner CVBS source.
Major · Check the Tuner.
checkpoints · This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
Power indicator LED is off.
No Check a set in the `Stand-by mode'.
Lamp(Backlight) on, no video ?
Yes
Check the RF source and check the
No Input the RF source properly.
connection of RF cable.
Yes
Check the Power of Tuner ?
1 - Pin #1 of Tuner : A3.3V_Tuner No Change the Main Ass'y.
- Pin #4 of Tuner : A1.8V_Tuner
Yes
Diagnostics Check the CVBS data out of IC1400 ?
- L903 : Tuner CVBS_OUT Check IC1400(NT14U).
2 No
- CVBS_OUT_TP : IC1400 CVBS_ Change the Main Ass'y.
OUT
Yes
Check the LVDS clk signal at output of
Main board. (TX) Check IC1400(NT14U).
2 No
- TX6_CLK : TCON SDA Change the Main Ass'y.
- TX8_DATA : TCON SCL
Yes
Check the LVDS cable?
No Please, Contact tech support.
Replace the T CON / LCD panel?
Caution Make sure to disconnect the power before working on the IP Board.
4-10
4. Troubleshooting
Location of Parts
Main Board_Front
B C
A
Detail
CVBS_OUT_TP: IC1400 CVBS OUT
L903: TUNER CVBS OUT
A B
Pin #4 : B3.3V
Pin #1 : A3.3V
C
4-11
4. Troubleshooting
Waveforms
1 CVBS OUT (Grey Bar) 2 LVDS output
4-12
4. Troubleshooting
4-2-4. No Video (Tuner DTV)
Note
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
Symptom · Audio is normal but no picture is displayed on the screen.
· Check the DTV source.
Major · Check the Tuner.
checkpoints · This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
Power indicator LED is off.
No Check a set in the `Stand-by mode'.
Lamp(Backlight) on, no video ?
Yes
Check the RF source and check the
No Input the RF source properly.
connection of RF cable.
Yes
Check the `signal strength' in Self
1 No Check the D-TV source.
Diagnosis menu Strength is enough ?
Yes
Diagnostics Check the Power of Tuner ?
2 - Pin #1 of Tuner : A3.3V_Tuner No Change the Main Ass'y.
- Pin #4 of Tuner : A1.8V_Tuner
Yes
Check the LVDS clk signal at output of
Main board. (TX) Check IC1400(NT14U)
2 No
- TX6_CLK : TCON SDA Change the Main Ass'y.
- TX8_DATA : TCON SCL
Yes
Check the LVDS cable?
No Please, Contact tech support.
Replace the T CON / LCD panel?
Caution Make sure to disconnect the power before working on the IP Board.
4-13
4. Troubleshooting
Location of Parts
Main Board_Front
B
A
Detail
A B
Pin #4 : B3.3V
Pin #1 : A3.3V
4-14
4. Troubleshooting
Waveforms
1 LVDS output 2 CH_CLK, CH_VALID
2 CH_CLK, CH_VALID
4-15
4. Troubleshooting
4-2-5. No Video (Video AV)
Note
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
Symptom · Audio is normal but no picture is displayed on the screen.
· Check the Video CVBS source.
Major
checkpoints · This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
Power indicator LED is off.
No Check a set in the `Stand-by mode'.
Lamp(Backlight) on, no video ?
Yes
Check the video source and check the
No Input the video source properly.
connection of video cable?
Yes
Diagnostics
Check the LVDS clk signal at output of
Main board. (TX) Check IC1400(NT14U).
2 No
- TX6_CLK : TCON SDA Change the Main Ass'y.
- TX8_DATA : TCON SCL
Yes
Check the LVDS cable?
No Please, Contact tech support.
Replace the T CON / LCD panel?
Caution Make sure to disconnect the power before working on the IP Board.
4-16
4. Troubleshooting
Location of Parts
Main Board_Front
A
B
Detail
A B
R1019, C1011 : COMP2_Y_CVBS
4-17
4. Troubleshooting
Waveforms
1 CVBS OUT (Grey Bar) 2 LVDS output
4-18
4. Troubleshooting
4-2-6. No Video (COMPONENT)
Note
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
Symptom · Audio is normal but no picture is displayed on the screen.
· Check the Component source
Major
checkpoints · This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
Power indicator LED is off.
No Check a set in the `Stand-by mode'.
Lamp(Backlight) on, no video ?
Yes
Check the component source and check
the connection of component cables ? No Input the component source properly.
Y, Pb, Pr
Yes
Does the component data appear at ?
- COMP2_Y_CVBS : R505 Check CN502.
1 No
Diagnostics - Pb : R504 Change the Main Ass'y.
- Pr : R502
Yes
Check the LVDS clk signal at output of
Main Board. (TX) Check IC1400(NT14U).
2 No