Samsung UN55MU850DF User manual

UHD TV
SERVICEManual
UHD TV Contents
1. Precautions
2. Product specications
3. Disassembly and Reassembly
4. Troubleshooting
5. Wiring Diagram
UN**MU850DF
Chassis : UWU71
Model : UN55MU850DF
UN65MU850DF

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 Specications.................................................................................................2-1
2-1. Product information .............................................................................................................2-1
2-2. Product specication ...........................................................................................................2-2
2-3. Accessories ........................................................................................................................2-3
2-4. Viewing the Functions .........................................................................................................2-5
2-4-1. 2017' Concept ................................................................................................2-5
2-4-2. TV Plus.....................................................................................................................2-6
2-4-3. Smart Features.........................................................................................................2-7
2-4-4. The Samsung Smart Remote.................................................................................2-10
3. Disassembly and Reassembly....................................................................................3-1
3-1. Disassembly and Reassembly ............................................................................................3-1
4. Troubleshooting ...........................................................................................................4-1
4-1. Previous Check ..................................................................................................................4-1
4-2. How to Check Fault Symptom.............................................................................................4-2
4-2-1. Power .......................................................................................................................4-2
4-2-2. Video.........................................................................................................................4-9
4-2-3. One Connect ..........................................................................................................4-10
4-2-4. Troubleshooting Video Problems............................................................................4-11
4-2-5. Audio.......................................................................................................................4-15
4-2-6. Network...................................................................................................................4-16
4-2-7. Smart Hub ..............................................................................................................4-17
4-2-8. Bluetooth / WiFi Module .........................................................................................4-19
4-3. Factory Mode.....................................................................................................................4-20
4-4. Factory Mode Adjustments................................................................................................4-25
4-4-1. Detail Factory Option..............................................................................................4-25
4-4-2. Factory Data...........................................................................................................4-27
4-5. AV Control Tabe.................................................................................................................4-40
4-6. Dimensions........................................................................................................................4-47
4-7. Updating the TV’s Software...............................................................................................4-48

5. Wiring Diagram.............................................................................................................5-1
5-1. Wiring Diagram....................................................................................................................5-1
5-2. Connector............................................................................................................................5-5
5-2-1. Main Board ...............................................................................................................5-5
5-2-2. One Connect Board................................................................................................5-10
5-2-3. SMPS Board...........................................................................................................5-12
ANNEX. Exploded View & Part List [UN55MU850DFXZA FA01]........................ANNEX-1
1-1. Exploded View.......................................................................................................... ANNEX-1
1-1-1. Parts List........................................................................................................ ANNEX-1
1-2. ONE CONNECT Exploded View.............................................................................. ANNEX-2
1-2-1. Parts List........................................................................................................ ANNEX-2
2-1. Electrical Parts List................................................................................................... ANNEX-3
ANNEX. Exploded View & Part List [UN65MU850DFXZAAA02] .......................ANNEX-1
1-1. Exploded View.......................................................................................................... ANNEX-1
1-1-1. Parts List........................................................................................................ ANNEX-1
1-2. ONE CONNECT Exploded View.............................................................................. ANNEX-2
1-2-1. Parts List........................................................................................................ ANNEX-2
2-1. Electrical Parts List................................................................................................... ANNEX-3

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.
© 2017 Samsung Electronics Co.,Ltd.
All rights reserved.
Printed in Korea

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 theAC 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**MU850DF
Front View
W
D
* W : Width H : High D : Depth
H
Detail View
Color Front : CHARCOAL BLACK / Stand : CHARCOAL BLACK
Dimensions
(W x H x D)
55" Without Stand 48.2 x 28.1 x 3.9 inches (1224.8 x 712.6 x 98.4 mm)
With Stand 48.2 x 30.9 x 9.8 inches (1224.8 x 783.6 x 247.9 mm)
65"
Without Stand 56.8 x 32.9 x 4.5 inches (1441.5 x 835.4 x 114.7 mm)
With Stand 56.8 x 36.0 x 11.5 inches (1441.5 x 913.2 x 291.3 mm)
Weight
55" Without Stand 38.6 lbs (17.5 kg)
With Stand 39.5 lbs (17.9 kg)
65"
Without Stand 54.7 lbs (24.8 kg)
With Stand 56.2 lbs (25.5 kg)
Flash 8GB (eMMC 5.0)
DDR LPDDR4 64bit @1.6GHz

2-2
2. Product specications
2-2. Product specication
NOTE
Design and specications are subject to change without prior notice.
Item UN**MU850DFXZA
General Information Product UHD
Series 8
Country UNITED STATES
Display Screen Size 55"/65"
PVI Site : no data
- Will add -

2-3
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.•
Image Product Inches Code. No
Samsung Smart Remote• All BN59-01266A
Batteries (AA x 2)• All 4301-000101
Power Cord• All 3903-001188
User Manual• All BN68-08436A
Regulatory Guide• All BN68-08114Q
One Connect• All BN91-18726A
One Connect Cable• All BN39-02210C
CLEAN BACK TERMINAL• All BN63-16527A
CLEAN BACK AC INLET• All BN63-16488A

2-4
2. Product specications
Image Product Inches Code. No
Wall Mount Adapter• All BN59-01266A

2-5
2. Product specications
2-4. Viewing the Functions
2-4-1. 2017' Concept
[Quick Setting] [Sources]
[Apps] [Live TV]

2-6
2. Product specications
2-4-2. TV Plus
[TV Shows]
[Movies]
[Samsung Check-Out]

2-7
2. Product specications
2-4-3. Smart Features
NOTE
The image on your TV may differ from the image above depending on your model and geographical area.•
Smart Hub
View descriptions of Smart Hub's basic functions.
After pressing the button on your remote control, you can surf the web and download apps with Smart Hub.
Some of the • Smart Hub services are paid services.
To use• Smart Hub, the TV must be connected to the Internet.
Some • Smart Hub features may not be available depending on the service provider, language, or region.
Smart Hub• service outages can be caused by disruptions in your Internet service.
You can view the entire text of the • Terms & Policy document by navigating to £ Settings £ Support £
Terms & Policy. If you want to stop using Smart Hub, you can cancel the agreement.
To cancel the Smart Hub service agreement though it is a required one, select • £ Settings £ Start Setup, and
then press the right directional button at the Smart Hub Terms & Conditions, Privacy Policy step.

2-8
2. Product specications
APPS
Download and run various apps from Smart Hub.
£š Apps
You can enjoy a wide range of content including news, sports, weather, and games by installing the corresponding apps
on your TV.
To use this feature, the TV must be connected to the Internet.•
When Smart Hub is launched for the rst time, the default apps are automatically installed. The default apps may •
differ with the geographical area.

2-9
2. Product specications
Pictures/Video/Music
Play media content stored on your TV, USB devices, smartphones, cameras, PCs, etc.
£s Source
You can play media content saved on storage devices, such as USB devices, mobile devices, and cameras, on the TV.
You cannot play media content if the content or the storage device is not supported by the TV. For more information, •
refer to "Read Before Playing Photo, Video, or Music Files."
To connect the TV to a computer, refer to "Connecting a Computer."•
Backup important les before connecting a USB device. Samsung is not responsible for damaged or lost les.•
To connect the TV to a mobile device, refer to "Connecting a Mobile Device."•

2-10
2. Product specications
2-4-4. The Samsung Smart Remote
English - 10
02 The Samsung Smart Remote
(Power)
Press to turn the TV on or off.
(Number pad)
Ǯ˵ʪΧθʪϑϑʪʒࡡɇЇɵʪθϑϩθΧ
appears on the bottom of the
screen. Select numbers and then
select Done to enter a numeric
value. Use to change the channel,
enter a PIN, enter a ZIP code, etc.
(Return)
Returns to the previous menu.
Ǯ˵ʪΧθʪϑϑʪʒ˙ͱθߢϑʪʀͱʒͱθͱθʪࡡ
the running function is terminated.
Ǯ˵ʪΧθʪϑϑʪʒи˵ʪцͱЇɇθʪ
watching a program, the previous
channel appears.
(Play/pause)
Ǯ˵ʪΧθʪϑϑʪʒࡡϩ˵ʪΧɇцɵɇʀ
controls appear. Using these
controls, you can control the media
content that is playing.
(Smart Hub)
Returns to the Home Screen.
VOL (Volume)
Move the button up or down to
adjust the volume. To mute the
ϑͱЇʒࡡΧθʪϑϑϩ˵ʪɵЇϩϩͱࢋǮ˵ʪ
pressed for 1 second or more, the
Accessibility Shortcuts menu
appears.
CH (Channel)
Move the button up or down to
change the channel. To see the
Guide screen, press the button.
Directional pad (up/down/left/
right)
Moves the focus and changes the
values seen on the TV's menu.
Select
Selects or runs a focused item.
Ǯ˵ʪΧθʪϑϑʪʒи˵ʪцͱЇɇθʪ
watching content, detailed program
˙ͱθɇϩͱɇΧΧʪɇθϑࢋǮ˵ʪΧθʪϑϑʪʒ
again, you can select or run any of
the functions displayed.
(Voice Interaction)
Runs Voice Interaction. Press the
button, say a voice command, and
then release the button to run
Voice InteractionࢋǮ˵ʪΧθʪϑϑʪʒ
once, the guide to Voice Interaction
appears.
[Keep the remote more than
0.6 inches from your face when
using Voice Interaction through
the mic on the remote.
4 Color buttons
Use these colored buttons to access
ɇʒʒϩͱɇͱΧϩͱϑϑΧʪʀѣʀϩͱϩ˵ʪ
feature in use.
Pairing the TV to the Samsung Smart Remote
Pairing the TV to the Samsung Smart Remote
Ǯ˵ʪцͱЇϩЇθͱϩ˵ʪƟǤ˙ͱθϩ˵ʪѣθϑϩϩʪࡡϩ˵ʪSamsung Smart Remote pairs
to the TV automatically. If the Samsung Smart Remote does not pair to the TV
automatically, point it at the remote control sensor of the TV, and then press
and hold the buttons labeled and ɇϑϑ˵ͱиϩ˵ʪѣ˝Їθʪͱϩ˵ʪʪ˙ϩ
simultaneously for 3 seconds or more.
Installing batteries into the Samsung Smart Remote
To install the batteries, push the rear cover open in the direction of the arrow, and then insert the batteries as shown
ϩ˵ʪѣ˝ЇθʪࢋđɇʪϑЇθʪϩ˵ɇϩϩ˵ʪΧͱϑϩЭʪɇʒʪ˝ɇϩЭʪʪʒϑɇθʪ˙ɇʀ˝ϩ˵ʪʀͱθθʪʀϩʒθʪʀϩͱࢋ
׃Alkaline batteries are recommended for longer battery life.
English - 11
When you turn on the TV for the rst time, the Samsung Smart Remote pairs
to the TV automatically. If the Samsung Smart Remote does not pair to the TV
automatically, point it at the remote control sensor of the TV, and then press and hold
the buttons labeled and as shown in the gure on the left simultaneously for
3 seconds or more.

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.
CAUTION
Disconnect the LED TV from the power source before disassembly.1.
Follow these directions carefully.2. Use the Samsung Service tool to disassemble the cabinet.-
Recommend to use the Samsung Service tool.•
Recommended Torque for Cabinet/Stand screws : 22.0 ~ 26.5lbf-
A strength of Torque can be changed depending on the situation.•
Required Jigs & Tools
Open Jig Tool• BN81-14946A
3-1. Disassembly and Reassembly
Description & Screws Picture Description
1
Carefully position the TV so that the screen is
facing downwards. Make sure to place the TV
upon a soft cushion or any material that will
prevent damage to the screen.
Place TV face down on the Protective Cushion.•
2
Remove the ASSY STAND P-BOTTOM (R/L)
with pulling it down.