Samsung UN HU7250F Series User manual

UHD TV
SERVICEManual
UHD TV Contents
1. Precautions
2. Product specications
3. Disassembly and Reassembly
4. Troubleshooting
5. Wiring Diagram
UN**HU7250F
Chassis : U8JD
Model : UN55HU7250F
UN65HU7250F

Contents
1. 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 Specications.................................................................................................2-1
2-1. Product information .............................................................................................................2-1
2-2. Product specication ...........................................................................................................2-2
2-2-1. Feature & Specications...........................................................................................2-2
2-2-2. Detailed Specications .............................................................................................2-3
2-3. Accessories ........................................................................................................................2-7
2-4. Viewing the Functions ........................................................................................................2-8
2-4-1. Using the Samsung Smart Control ...........................................................................2-8
2-4-2. Viewing the Panel...................................................................................................2-10
2-4-3. Motion Control ........................................................................................................2-14
3. Disassembly and Reassembly ....................................................................................3-1
3-1. Disassembly and Reassembly ............................................................................................3-1
3-1-1. Set Disassembly.......................................................................................................3-1
4. Troubleshooting ...........................................................................................................4-1
4-1. Troubleshooting...................................................................................................................4-1
4-1-1. Previous Check ........................................................................................................4-1
4-1-2. Simple ow 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)....................................................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..............................................................................................................4-45

4-5. RS-232C............................................................................................................................4-46
4-6. AV Control Tabe.................................................................................................................4-47
4-7. Updating the TV’s Software...............................................................................................4-53
5. Wiring Diagram.............................................................................................................5-1
5-1. Wiring Diagram....................................................................................................................5-1
5-2. Connector............................................................................................................................5-3
5-3. Connector Functions ...........................................................................................................5-7
5-4. Cables and Module..............................................................................................................5-8

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.
© 2014 Samsung Electronics Co.,Ltd.
All rights reserved.
Printed in Korea

3-1
3. Disassembly and Reassemble
3. Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the LED TV.
WARNING
This LED TV contains electrostatically sensitive devices. Use caution when handling these components.
3-1. Disassembly and Reassembly
CAUTION
Disconnect the LED TV from the power source before disassembly.1.
Follow these directions carefully; never use metal instruments to pry apart the cabinet.2.
If there is no additional coment, it is same for all inches.3.
3-1-1. Set Disassembly
Description Picture Description Screws
1
Place TV face down on cushioned table.
2
Remove 4 screws from the ASSY
GUIDE P-STAND. Torque :
9~11Kgf.cm.
6003-001208
3
Remove the ASSY STAND P-BASE.

3-2
3. Disassembly and Reassemble
Description Picture Description Screws
4
Remove screws from the ASSY COVER
P-REAR.
55 inches : 21EA / 2EA•
65 inches : 21EA / 2EA•
Torque :
7~8Kgf.cm.
6001-002755
Torque :
9~11Kgf.cm.
6003-001782
Remove the ASSY COVER P-REAR.•
5
Remove the all cables.
Speaker Cable
Power Cable
Power Cable
Panel Drive Cable
LVDS Cable
6
Remove the ASSY SPEAKER P (L/R).

3-3
3. Disassembly and Reassemble
Description Picture Description Screws
7
Remove screws from the ASSY PCB
MAIN.
55 inches : 6 EA•
65 inches : 6 EA•
Torque :
7~8Kgf.cm
6001-003016
8
Remove screws from the DC VSS-LED
TV PD BD.
55 inches : 7 EA•
65 inches : 7 EA•
Torque :
7~8Kgf.cm
6001-003016
9
Before removing the 1NET WORK-
WIFI MODULE, 2ASSY BOARD P-RF-
MODULE cable and remove the screws.
2 ASSY BOARD P-RF-MODULE
1 NETWORK-WIFI MODULE
1• NETWORK-WIFI MODULE
Remove the cable.-

3-4
3. Disassembly and Reassemble
Description Picture Description Screws
2• ASSY BOARD P-RF-MODULE
Remove the cable.-
10
Remove the screws.
T-con Board
Torque :
7~8Kgf.cm
6001-003016
Remove the T-CON cable.
NOTE
Reassembly procedures are in the reverse order of disassembly procedures.

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
WARNING
For continued safety, do not attempt to modify the circuit board.
Disconnect the AC power and DC power jack before servicing.
1-1-2. Servicing the LED TV
When servicing the LED 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. Check the calibration of this2.
meter periodically.
1-1-3. Fire and Shock Hazard
Before returning the monitor 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 the1.
chassis and other metal parts in the monitor.
Inspect all protective devices such as nonmetallic control knobs, insulating materials, cabinet backs, adjustment and2.
compartment covers or shields, isolation resistorcapacitor networks, mechanical insulators, etc.
Leakage Current Hot Check:3.
DEVICE
UNDER
TEST
(READING SHOULD)
NOT BE ABOVE 0.5mA LEAKAGE
CURRENT
TESTER
TEST ALL
EXPOSED METAL
SURFACES
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
EARTH
GROUND
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 rst 4.
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

1-2
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 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.

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 conict between the following servicing precautions and any of the
safety precautions, always follow the safety precautions.
1-2-1. General Servicing Precautions
Always unplug the unit’s AC power cord from the AC power source and disconnect the DC Power Jack before1.
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.
Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used.2.
The internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements
to their original position.
After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that3.
the area around the serviced part has not been damaged.
Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input4.
terminals and earphone jacks).
Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. Connect5.
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.
Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead;6.
always remove the instrument’s ground lead last.
1-3
1. Precautions
1-2. Servicing 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.
Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your1.
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.
After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent2.
accumulation of an electrostatic charge.
Do not use freon-propelled chemicals. These can generate electrical charges sufcient to damage ESDs.3.
Use only a grounded-tip soldering iron to solder or desolder ESDs.4.
Use only an anti-static solder removal device. Some solder removal devices not classied as “anti-static” can generate 5.
electrical charges sufcient to damage ESDs.
Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs6.
are packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive
materials.
Immediately before removing the protective material from the leads of a replacement ESD, touch the protective material7.
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.
Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, or8.
lifting your foot from a carpeted oor can generate enough static electricity to damage an ESD.
1-4
1. Precautions
1-3. Static Electricity 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 temperature3.
may cause re.
Bend the external antenna cable when connecting it to the product. This is a measure to protect it from being exposed4.
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 check5.
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.
If an equipment is provided with a replaceable battery, and if replacement by an incorrect type could result in an8.
explosion (for example, with some lithium batteries), the following applies:
CAUTION
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 re.•
Do not short circuit, disassemble or overheat the batteries.•
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, re or the like.•
1-5
1. Precautions
1-4. Installation Precautions

2-1
2. Product specications
2. Product Specications
2-1. Product information
Model UN**HU7250F
Front View
W
D
* W : Width H : High D : Depth
H
Detail View
Color Front Color : BLACK / Stand Color : BLACK
Dimensions
(W x H x D)
55"
Without Stand 48.5 x 28.1 x 4.3 inches (1233.0 x 714.6 x 111.4 mm)
With Stand 48.5 x 29.9 x 11.6 inches (1233.0 x 760.4 x 294.9 mm)
65"
Without Stand 57.1 x 33.0 x 5.2 inches (1451.2 x 839.9 x 134.6 mm)
With Stand 57.1 x 34.6 x 11.7 inches (1451.2 x 881.0 x 298.5 mm)
Weight
55"
Without Stand 41.6 lbs (18.9 kg)
With Stand 48.0 lbs (21.8 kg)
65"
Without Stand 61.7 lbs (28.0 kg)
With Stand 69.8 lbs (31.7 kg)
Panel Type Black
Internal Memory 4G
DDR 2G
Feature Instant On, TTS/Zoom, History Digital Clean View, PIP, USB HID, TV soundConnect,
One Connect(Ready)

2-2
2. Product specications
2-2. Product specication
2-2-1. Feature & Specications
Feature
Digital-TV, RF, 4-HDMI, 1-Component, 1-A/V, 3-USB (2-USB 2.0, 1-USB3.0), Media Play, CI+(1.3), LAN, WIFI•
PIP (in HDMI 1, 2, 3, 4 Component and Sub picture is available only in TV mode(DTV/ATV))•
Dolby MS11, DTS Premium Sound 5.1, DTS Studio Sound•
Specications
Model UN55HU7250F UN65HU7250F
Item Description
Screen Size (Diagonal) 55 inches 65 inches
LCD Panel UHD 60Hz
Scanning Frequency Horizontal : 60~136kHz
Vertical : 56~75Hz
Display Colors 1.07B
Display Resolution 3840 x 2160
Input Signal RGB 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 138MHz
AC Power Voltage & Frequency AC110-120V 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) 20W (Left 10W, Right 10W)
Note : AllShare, SMART Guide, Web Browser, USB HID, IR Blaster, Smart Control

2-3
2. Product specications
2-2-2. Detailed Specications
NOTE
Design and specications are subject to change without prior notice.
Item UN**HU7250FXZA
General Information Product LED
Series 7
Country UNITED STATES
Display Inch 55"/65"
Resolution 3,840 x 2,160
Ultra Clear Panel Yes
Screen Curvature 4,200R
Video Clear Motion Rate 960
Micro Dimming UHD Dimming
Precision Black (Local Dimming) N/A
Wide Color Enhancer (Plus) Yes
Color Accuracy N/A
Auto Depth Enhancer No
Auto Motion Plus 120HzHz
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

2-4
2. Product specications
Item UN**HU7250FXZA
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
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
Wireless LAN Built-in Yes
Anynet+ (HDMI-CEC) Yes
Design Design T-shape
Bezel Type VNB
Light Effect (Deco) N/A
Stand Type T-shape
Swivel (Left/Right) No
Camera Type N/A
Additional Feature Samsung 3D N/A
3D Converter N/A
Instant On Yes

2-5
2. Product specications
Item UN**HU7250FXZA
Additional Feature 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 Energy Star 6.1
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 N/A
Mini Wall Mount Supported Yes
Vesa Wall Mount Supported Yes
IR Extender Cable (Included) Yes
Wireless Keyboard (Included) No
User Manual Yes
E-Manual Yes
Power Cable Yes

2-6
2. Product specications
Item UN**HU7250FXZA
Accessory Slim Gender Cable N/A

2-7
2. Product specications
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.•
The provided accessories may vary depending on the model.•
Product Code. No Product Code. No
Samsung Smart Control• BN59-01185F User Manual• BN68-06542A
Batteries (AA x 2)• 4301-000101 Regulatory guide• BN68-04972A
Power Cord• 3903-000853
Image Product Code. No
IR Extender Cable• BN96-31644A
Wall Mount Adapter• BN61-07295A