Haier LE75H9000U User manual

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This service informationis designedfor experiencedrepair technicians onlyandis not designedfor use by the general
public.
It does not contain warnings or cautions to advise non-technical individuals of potentialdangers 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.
Haier SERVICE MANUAL
LED TV
Model No.LE75H9000U
Main chipset:MS6488E
© 2013 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and
distribution is a violation of law
WARNING

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CONTENTS
Chapter 1. General Information
1-1. Document Information ..............................................................4
1-2. General Guidelines.....................................................................4
1-3. Important Notice.........................................................................4
1-3-1. Follow the regulations and warnings ......................................................... 4
1-3-2. Be careful to the electrical shock .................................................................4
1-3-3. Electro static discharge (ESD)................................................................... .4
1-3-4. About lead free solder (PbF).........................................................................5
1-3-5. Use the genewing parts (specified parts) .................................................. 5
1-3-6 Safety check after repairment..................................................................... 5
1-3-7. Ordering Spare Parts................................................................................. 6
1-3-8. Photo used in this manual ...........................................................................6
1-4. How to Read this Service Manual ............................................6
Using icons .....................................................................................................................6
Chapter 2. Specification
2-1. Specification list.........................................................................8
2-2. External pictures (four faces)....................................................9
Chapter 3. Disassemble and Assemble
3-1. LE75H9000U ...........................................................................11
3-1-1. Remove the Stand......................................................................................11
3-1-2. Remove the Back Cabinet .........................................................................11
3-1-3. Remove the Mainboard..............................................................................11
3-1-4. Remove the Power Supply Module ...........................................................11
3-1-5. Remove the Speaker..................................................................................11
3-1-6. Remove the Remote Control Board ..........................................................12
3-1-7. Remove the Key Board..............................................................................12
Chapter 4. Location of Controls and Components
4-1. Board Location ........................................................................13
4-2. Mainboard ................................................................................14
4-2-1. Function Description .................................................................................14
4-2-2. Connector definition ..................................................................................14
4-3.LED Panel ...............................................................................15
4-3. LED Panel LVDS Interface Connections…............................16
Chapter 5. Installation Instructions
5-1. Accessories .............................................................................17
5-2. Base Stand Assembly Instruction..........................................18

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Chapter 6. Operation Instructions
6-1. Front Panel Controls.....................................................................19
6-2. Back Panel Controls .....................................................................20
6-3. Setting Up Your Remote Control .................................................21
Chapter 7. Electrical Parts
7-1. Circuit Diagram...............................................................................22
Chapter 8. Measurements and Adjustments
8-1. Software Update ............................................................................22
Chapter 9. Trouble shooting
9-1.PowerTroubleshooting ..................................................................27

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Chapter 1. General Information
1-1. Document Information
Document format: Adobe PDF
Author: Gaobingbing
Compiler:
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).
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

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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.
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
● Components identified by mark have special characteristics important for safety.
1-3-6 Safety check after repairment
Confirm 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 flammable 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.

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CAUTION: Do 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.
12. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
13. Use only an anti-static type solder removal device. Some solder removal devices not
classified as "anti-static" can generate electrical charges sufficient to damage ES devices.
14. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to
damage ES devices.
15. 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).
16. 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.
17. 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 floor 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 cover of each product. Software
version can be found in the Spare Parts List.
2. Spare part No. and description
Spare part No. and description can be found in the Spare Parts List.
1-3-8. Photo used in this manual
The illustration and photos used in this Service 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

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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.
Chapter 2. Specification
2-1. Specification list
Model
LE75U9000U
Screen Size
75"
Aspect Ratio
16:9
Resolution
3840x2160
Brightness (cd/m²)
300
Contrast
3500:1
Response Time (ms)
6.5
Angel of View
H:170°, V:170°
Color Display
1.07G
OSD Language
English,Arabic,farsi,French,Portu
guese,Russian.
,
,French,.
Color System
PAL/SECAM
Audio System
BG/DK/L/I
Audio Output Power (Built-in) (W)
10W×2
Audio Output Power (outer) (W)
No
Total Power Input (W)
350W
Voltage Range (V)
AC100V~240V
Power Frequency (Hz)
50~60Hz
Time of Sleep Timer (MINS)
240Min
Net Weight (KG)
30.3
Gross Weight (KG)
31.3
Net Dimension (MM)
1685x973x84mm
Packaged Dimension (MM)
1923x322x1210mm

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2-2. External pictures (four faces)
Front Side

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Up Side
Right Side

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Back Side
Chapter 3. Disassemble and Assemble
3-1. LE75H9000U
3-1-1. Remove the Stand 3-1-3. Remove the Mainboard
1. Remove the four screws indicated .
2. Remove the Power Supply Module.
1. Lay down the TV set .
2. Remove the four screws from the stand which
in the picture above,
3. Remove the stand.
3-1-5. Remove the Speaker
Remove the Speaker indicated by red
circle in below picture.
3-1-2. Remove the Back Cabinet

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1.Remove the fourteen screws .
2.Flip machine, panel side up.
3.Carefully raise the Front shell from bottom.
3-1-6. Remove the Remote Control Board And the Key Board
Remove the Remote Control Board and the Key Board indicated by
red circle in below picture.

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Chapter 4. Location of Controls and Components
4-1. Board Location
C Panel
B Main Board
No.
Parts Type
Description
A Board
HKL-750203
Power board
B Board
20177（6488+6M60）
Main board
C Panel
SAMSUNG LSC750FF01
LED Panel
APower Board

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4-2. Mainboard
4-2-1. Function Description
Process signal which incept from exterior equipment then translate into signal that panel can
display.
4-2-2. Connector definition

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4-3. LED Panel
LE75H9000U
Backlight
Unit
LVDS Connector

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4-4. LED Panel LVDS Interface Connections

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Chapter 5. Installation Instructions
5-1. Accessories

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5-2

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Chapter 6. Operation Instructions
6-1. Front Panel Controls

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6-2. Back Panel Controls
6-3. Setting Up Your Remote Controls

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Chapter 7. Electrical Parts