Haier LE49K6500U Schematic
SERVICE MANUAL
LED TV
Model No.
MSD6586
LE49K6500U
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.
Service Manual
Model No.:
Chapter 1: General Information
1-1. Table of Contents
1. General Information...........................................................................
1-1. Table of Contents
1-2. General Guidelines
1-3. Important Notice
1-4. How to Read this Service Manual
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3. Location of Controls and Components...........................................
3-1. Board Location
3-2. Main Board & AV Board
3-3. Power board
3-4. LCD Panel 13
4. Disassemble and Assemble..........................................................
4-1 Remove the Pedestal
4-2 Remove the Back Cover 14
4-3 Remove the Adhesive
4-4 Remove the Main Board 15
Tape 14
1
1
3
3
6
6
88
8
8
11
14
14
4-5 Remove the Speaker 15
4-6 Remove the Remote Control Board 16
4-6 Remove the Power board 16
5. Installation Instructions..…....………………...........………….........
5-1 External Equipment Connections
5-2 HDMI Connections 21
6. Operation Instructions....…....………………...........………….........
6-1 Front Panel Controls
6-2 Back Panel Controls
6-3 Universal Remote Control
7. Electrical Parts…....………………...........………….........................
7-1. Block Diagram
7-2. Circuit Diagram
7-3. Wiring Connection Diagram
17
17
24
24
24
25
26
26
27
36
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Service Manual
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8. Measurements and Adjustments
8-1. How to enter into the factory model
8-2. How to update software
8-3. How to enter into the Hotel Model
........…………............................
9. Trouble-shooting…………..............................................................
9-1. Simple Check 51
9-2. Main Board Failure Check
9-3. Panel Failure
37
48
49
50
51
52
58
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Service Manual
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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
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to rain or excessive moisture. This TV must not be exposed to dripping or splashing water,
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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.
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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
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1-3-6 Safety Check after Repairment
Service Manual
Model No.:
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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.
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General Servicing Precautions
1.
Always unplug the receiver
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.
AC power cord from the
AC power source before;
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).
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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.
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CAUTION: 'R QRW FRQQHFW WKH WHVW ¿[WXUH JURXQG VWUDS WR DQ\ KHDW VLQN LQ WKLV UHFeiver.
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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Service Manual
Model No.:
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 semiconductorequipped assembly, drain off any electrostatic charge on your body by touching a known
earth ground.
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.
Alternatively, obtain and wear a commercially available discharging wrist
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
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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
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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
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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:
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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.
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Service Manual
Model No.:
.
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/
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Service Manual
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3. Location of Controls and Components
3-1 Board Location
Service Manual
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A Board
B Board
3-2 Main Board
No. Description
A Board Mainboard
B
Board
Power Supply
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3-2-1 Function Description:
Main Board
Pr
ocess signal which incept from exterior equipment then translate into signal that panel
can display.
3-2-2 Connector denition
Main board connector
Power connectors ( J 20 )
Notes:
J 20-Pin 3: Backlight on/off:
he system can turn on or turn off the backlight of TFT LCD Panel through the power
T
supply unit path.
J 20-Pin 5: System power on / standby
System board will use this pin to control system power.
J 20-Pin 3: Control the luminance of backlight
The system can generate the PWN signal to control the strength of TFT LCD Panel’s
backlight through this connector
Speaker connector (CN604)
Pin number Signal name Description
1 RSPK+ RSPK+
2 RSPK- RSPK3 LSPK- LSPK4 LSPK+ LSPK+
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Keypad and remote connector ( 2)Keypad and remote connector ( 2)Keypad and remote connector (J 2)
Service Manual
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WIFI J ACK J 25
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3-3. Power Board
3-3-1 Function Description:
Supply power for Main board, Panel.
3-3-2Connectordefinition
CON201
Pin number Signal name
1
2
3
4
5
6
7 +5V
8
9
10
11
12
13
SGND
AD
ON/BK
+5V
ON/OFF
+5VSTB
+5V
GND
GND
GND
+12V
+12V
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3-4. LED Panel
Service Manual
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LSC490FN02-W/
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Service Manual
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3-4-1.Connector de finition
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4. Disassemble and assemble
4-1 Remove the Pedestal
4-2Remove the Back Cover
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faces upward
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4-3. Remove the adhesive tape
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unit.
Remove the adhesive tape indicated on the
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4-4 Remove the Main board
Service Manual
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4-5 Remove the speaker
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Take out the speaker
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