Kivi 40U710KB User manual

SERVICE MANUAL
LED TV
Model No.
40U710KB
MSD6886
Chassis
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

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Chapter 1: General Information
1-1. Table of Contents
1. General Information...........................................................................1
1-1. Table of Contents 1
1-2. General Guidelines 3
1-3. Important Notice 3
1-4. How to Read this Service Manual 6
2. Specifications.................................................................................... 6
3. Location of Controls and Components...........................................
8
3-1. Board Location 8
3-2. Main Board & AV Board 8
3-3. Power Board 11
3-4. LCD Panel 12
4. Disassemble and Assemble.......................................................... 15
4-1 Remove the Pedestal 15
4-2 Remove the Back Cover 15
4-5 Remove the Power Module 16
4-6 Remove the Main Board 16
4-7 Remove the Speaker 17
4-8 Remove the Remote Control Board 17
5. Installation Instructions..…....………………...........………….........
18
5-1 External Equipment Connections 18
5-2 HDMI Connections 21
6. Operation Instructions....…....………………...........………….........
24
6-1 Front Panel Controls 24
6-2 Back Panel Controls 24
6-3 Universal Remote Control 25
7. Electrical Parts…....………………...........…………......................... 26
7-1. Block Diagram 26
7-2. Circuit Diagram 27
7-3. Wiring Connection Diagram 37

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8. Measurements and Adjustments........…………............................ 38
8-1. How to enter into the factory model 49
8-2. How to update software 50
8-3. How to enter into the hotel model 51
9. Trouble-shooting………….............................................................. 52
9-1. Simple Check 52
9-2. Main Board Failure Check 53
9-3. Panel Failure 60
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1-2. General Guidelines
When servicing, observe the original lead dress. If a short circuit is found, replace all parts
which have been overheated or damaged by the short circuit.
After servicing, see to it that all the protective devices such as insulation barriers, insulation
papers shields are properly installed.
After servicing, make the following leakage current checks to prevent the customer from
being exposed to shock hazards.
1) Leakage Current Cold Check
2) Leakage Current Hot Check
3) Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive
1-3. Important Notice
1-3-1. Follow the regulations and warnings
Most important thing is to list up the potential hazard or risk for the service personnel to open
the units and disassemble the units. For example, we need to describe properly how to
avoid the possibility to get electrical shock from the live power supply or charged electrical
parts (even the power is off).
This symbol indicates that high voltage is present inside.It is dangerous to
make any king of contact with any inside part of this product.
This symbol indicates that there are important operating and maintenance
instructions in the literture accompanying the appliance.
1-3-2. Be careful to the electrical shock
To prevent damage which might result in electric shock or fire, do not expose this TV set
to rain or excessive moisture. This TV must not be exposed to dripping or splashing water,
and objects filled with liquid, such as vases, must not be placed on top of or above the TV.
1-3-3. Electro static discharge (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such
components commonly are called Electrostatically Sensitive (ES) Devices. The following
techniques should be used to help reduce the incidence of component damage caused by
electros static discharge (ESD).
1-3-4. About lead free solder (PbF)
This product is manufactured using lead-free solder as a part of a movement within the
consumer products industry at large to be environmentally responsible. Lead-free solder
must be used in the servicing and repairing of this product.
1-3-5. Use the genewing parts (specified parts)
Special parts which have purposes of fire retardant (resistors), high-quality sound
(capacitors), low noise (resistors), etc. are used.
When replacing any of components, be sure to use only manufacture's specified parts
shown in the parts list.
Safety Component
/ :omponents identified by mark have special characteristics important for safety.
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1-3-6 Safety Check after Repairment
:onfirm that the screws, parts and wiring which were removed in order to service are put
in the original positions, or whether there are the positions which are deteriorated around the
serviced places serviced or not. Check the insulation between the antenna terminal or
external metal and the AC cord plug blades. And be sure the safety of that.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power source before;
a. Removing or reinstalling any component, circuit board module or any other receiver
assembly.
b. Disconnecting or reconnecting any receiver electrical plug or other electrical
connection.
c. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic
capacitors may result in an explosion hazard.
2. Test high voltage only by measuring it with an appropriate high voltage meter or other
voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage
probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its assemblies.
4. Unless specified otherwise in this service manual, clean electrical contacts only by
applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or
comparable non-abrasive applicator; 10% (by volume) Acetone and 90% (by volume)
isopropyl alcohol (90%-99% strength).
CAUTION: This is a Qammable mixture.
Unless specified otherwise in this service manual, lubrication of contacts is not required.
Capacitors may result in an explosion hazard.
5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this
service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its electrical assemblies unless
all solid-state device heat sinks are correctly installed.
7. Always connect the test receiver ground lead to the receiver chassis ground before
connecting the test receiver positive lead.
Always remove the test receiver ground lead last. Capacitors may result in an explosion
hazard.
8. Use with this receiver only the test fixtures specified in this service manual.
CAUTION: Jo not connect the test fixture ground strap to any heat sink in this receiver.
9. Remove the antenna terminal on TV and turn on the TV.
10. Insulation resistance between the cord plug terminals and the eternal exposure metal
should be more than Mohm by using the 500V insulation resistance meter.
11. If the insulation resistance is less than M ohm, the inspection repair should be required.
If you have not the 500V insulation resistance meter, use a Tester. External exposure
metal: Antenna terminal Headphone jack
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Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily by static electricity.
Such components commonly are called Electrostatically Sensitive (ES) Devices.
Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques should be used to help reduce
the ncidence of component damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-
equipped assembly, drain off any electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear a commercially available discharging wrist
strap device, which should be removed to prevent potential shock reasons prior to applying
power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly
on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static type solder removal device. Some solder removal devices not
classified as Yanti-staticY can generate electrical charges sufficient to damage ES devices.
5. Jo not use freon-propelled chemicals. These can generate electrical charges sufficient
to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately
before you are ready to install it.
(Most replacement ES devices are packaged with leads electrically shorted together by
conductive foam, aluminum foil or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement
ES device, 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 bodily motions when handling unpackaged replacement ES devices.
(Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting
of your foot from a carpeted Qoor can generate static electricity sufficient to damage an ES
device.)
1-3-7. Ordering Spare Parts
Please include the following informations when you order parts. (Particularly the Version
letter)
1. Model number, Serial number and Software Version
The model number and Serial number can be found on the back of each product and the
Software Version can be found at the Spare Parts List.
2. Spare Part No. and Description
You can find them in the Spare Parts List
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1-3-8. Photo used in this manual
The illustration and photos used in this Manual may not base on the final design of
products, which may differ from your products in some way.
1-4. How to Read this Service Manual
Using Icons:
Icons are used to attract the attention of the reader to specific information. The meaning of
each icon is described in the table below:
Note:
A “note” provides information that is not indispensable, but may nevertheless be valuable
to the reader, such as tips and tricks.
Caution:
A “caution” is used when there is danger that the reader, through incorrect manipulation,
may damage equipment, loose data, get an unexpected result or has to restart(part of) a
procedure.
Warning:
A “warning” is used when there is danger of personal injury.
Reference:
A “reference” guides the reader to other places in this binder or in this manual, where he/
she will find additional information on a specific topic.
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2. Specifications
Model
40U710KB
Screen Size
40 inch
Aspect Ratio
16:9
Resolution
3840x2160
Response Time (ms)
TYP:9.5 (GRAY TO GRAY
Angel of View
89°
Colors
1.07G
No. of Preset Channels
1000
OSD Language
English
Color System
PAL/SECAM
Audio System
DK, BG, I, M, L, L'
Audio Output Power
(Built-in) (W)
8
W×2
Audio Output Power
(outer) (W)
No
Total Power Input (W)
78 W
Voltage Range (V)
AC100V-240V
Power Frequency (Hz)
50~60Hz
Net Weight (KG)
6.6
7Gross Weight (KG)
Net Dimension (MM)
Packaged Dimension
(MM)
7
GRAY)
985*137*612
966*64*560

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3. Location of Controls and Components
3-1 Board Location
No.
Description
A Board
Main board
B Board
Power board
3-2 Main Board
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3-2-1 Function Description:
Main Board
Process signal which incept from exterior equipment then translate into signal that panel
can display.
3-2-2 :onnector definition
Main board connector
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1.DC POWER CONNECTOR (CN18)
2.TROMPETTE CONNECTOR(CN601)
1.DC POWER CONNECTOR (CN18)

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3.KEY AND IR CONTRAL CONNECTOR(CN7)
4. WIFI AND BT CONNECTOR(CN20)

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3-3. Power Board
3-3-1 Function Description:
Supply power for Main board, Panel.
3-3-2Connectordefinition
QDPH
1
+12V
2
+12V
3
GND
4
GND
5
GND
6
NC
7
NC
】
8 +5VSB
9 ON/OFF
10 +5V
11 NC
12 NC

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3-4. LCD Panel( LSC400FN05-8)

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4. Disassemble and assemble
4-1 Remove the Pedestal
Lay down the unit so that rear cover faces upward
Remove the four screw from the rear cover indicated with Then remove the pedestal
4-2Remove the Back Cover
Remove the these screw indicated on figure above by Then remove the back cover from the
unit.

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4-3 Remove the power module
Remove the four screw indicated on the figure above by Then remove the power
module
4-4 Remove the Main board
Remove the two screw indicated on the figure above by Disconnected the coupler
Remove the Main board
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4-5 Remove the speaker
Take out the speaker
4-6 Remove the remote control
take out the remote control board

Service Manual
5. Installation Instructions
5-1 External Equipment Connections
INSTALLATION
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5-2 HDMI Connections
When the source device supports HDM
How To Connect
1. Connect the source device to HDMI port of this TV with an HDMI cable(not supplied
with this product).
2. No separated audio connection is necessary.
How To Use
If the source device supports Auto HDMI function, the output resolution of the source
device will be automatically
set to 1280x720p.
If the source device does not support Auto HDMI, you need to set the output resolution
appropriately.
To get the best picture quality, adjust the output resolution of the source device to
1280x720p.
Select HDMI input source in input source option of Select Main source menu.
When the source devicesupports DVI
How To Connect
1. Connect the source device to HDMI port of this TV with a HDMI-to-DVI cable(not
supplied with this product).
2. A separated audio connection is necessary.
3. If the source device has an analog audio output connector, connect the source device
audio output to DVI Audio In port located on the PC port.
How To Use
If the source device supports Auto DVI function, the output resolution of the source device
will be automatically
set to 1280x720p.
If the source device does not support Auto DVI, you need to set the output resolution
appropriately.
To get the best picture quality, adjust the output resolution of the source device to
1280x720p.
Press the INPUT button to select HDMI input source in input source option of Select Main
source menu.
Installat