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HL40XSL2a
Schematic
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Haier HL40XSL2a Schematic

SERVICE MANUAL
LED LCD TV
Model No.
HL40XSL2
Service mode HL40XSL2a
MTK5305
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.
Haier Group
CONTENTS
Chapter 1.General Information
Service Manual
Model No.: LEA40T3
1-1. Document Information 1-2. General Guidelines 1-3. Important Notice
1-3-1. Follow the regulations and warnings .....................................................3
1-3-2. Be careful to the electrical shock ...........................................................3
1-3-3. Electro static discharge (ESD) ...............................................................3
1-3-4. About lead free solder (PbF) ..................................................................4
1-3-5. Use the genewing parts (specifi ed parts) ..............................................4
1-3-6. Safety check after repairment ................................................................4
1-3-7. Ordering Spare Parts .............................................................................6
1-3-8. Photo used in this manual .....................................................................6
...................................................................................3
1-4. How to Read this Service Manual
1-4-1. Using icons: ...........................................................................................7
.......................................................................3
..............................................................................3
..................................................7
Chapter 2. Specifi cation
2-1. Specifi cation list 2-2. External pictures (four faces)
...................................................................................8
..........................................................9
Chapter 3. Disassemble and Assemble
3-1. Remove the Stand 3-2. Remove the Power Cord 3-3. Remove the Back Cover 3-4. Remove the Mainboard 3-5. Remove the speaker 3-6. Remove the Keypad 3-7. Remove the Remote Control Board 3-8. Remove the Stand backstop 3-9. Remove the indicator light
.............................................................................10
................................................................ 11
.................................................................. 11
................................................................... 11
........................................................................ 11
.........................................................................12
...........................................12
.........................................................12
............................................................12
Chapter 4. Location of Controls and Components
4-1. Board Location 4-2. Main Board
4-2-1. Function Description: ...........................................................................14
4-2-2. Connector defi nition .............................................................................14
4-3. Power Supply Board
...................................................................................13
..........................................................................................13
.........................................................................14
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Service Manual
4-4
h
2
2
27-3
2
2
3-4
Model No.: LEA40T3
4-3-1. Function description:............................................................................14
4-3-2. Connector defi nition: ............................................................................14
4-4. LCD Panel
4
4-4-1. Function Description: Display the signal. .............................................16
4
4-4-2. Connector defi nition: ............................................................................16
Chapter 5. Installation Instructions
C
.............................................................................................15
5-1. External Equipment Connections
5-
5-2. HDMI Connections
5-
Chapter 6. Operation Instructions
C
6-1. Get to know your TV
6-
6-2. Get to know your remote control
6-
Chapter 7. Electrical Parts
C
7-1. Block Diagram
7-
7-2. Circuit Diagram
7-
7-3. Wiring Connection Diagram
Chapter 8. Measurements and Adjustments
C
8-1. Service Mode
-
8-1-1.How to enter into Service Mode............................................................46
8-1-2.How to exit ............................................................................................46
8-2. Measurements and Adjustments
-
8-2-1. The Main Menu ....................................................................................46
8-2-2. Video ....................................................................................................47
8-2-3. Audio ....................................................................................................48
8-2-4. Software UpDate .................................................................................48
......................................................................................46
.............................................................................24
.........................................................................27
.....................................................................................29
...................................................................................31
...........................................................45
................................................20
.................................................28
..................................................46
Chapter 9. Trouble shooting
C
9-1. Simple check
-
9-2. Power Supply Board Failure Check.
-
9-3. Mainboard Failure Check
-
9-4. Pannel Failure
2
.......................................................................................49
...............................................................51
.....................................................................................52
...........................................50
Service Manual
Model No.: LEA40T3
Chapter 1.General Information
1-1. Document Information
Document format: Adobe PDF Author: 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
kind 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 fi lled 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
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Service Manual
Model No.: LEA40T3
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 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 (specifi ed parts)
Special parts which have purposes of fi re retardant (resistors), high-quality sound (capacitors), low noise (resistors), etc. are used.
When replacing any of components, be sure to use only manufacture's specifi ed parts shown in the parts list.
Safety Component
● Components identifi ed by mark have special characteristics important for safety.
1-3-6. Safety check after repairment
Confi rm 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:
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Service Manual
Model No.: LEA40T3
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:
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 non­abrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99% strength).
CAUTION:
Unless specifi ed 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.
A wrong part substitution or incorrect polarity installation of electrolytic capacitors
This is a fl ammable mixture.
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 fi xtures specifi ed in this service manual.
CAUTION:
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.
Do not connect the test fi xture ground strap to any heat sink in this receiver.
12. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
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Service Manual
Model No.: LEA40T3
13. Use only an anti-static type solder removal device. Some solder removal devices not classifi ed as "anti-static" can generate electrical charges suffi cient 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:
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 fl oor can generate static electricity suffi cient to damage an ES device.)
Be sure no power is applied to the chassis or circuit, and observe all other safety
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.
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1-4. How to Read this Service Manual
1-4-1. 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.
Service Manual
Model No.: LEA40T3
Reference:
A “reference” guides the reader to other places in this binder or in this manual, where he/she will fi nd additional information on a specifi c topic.
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Service Manual
Model No.: LEA40T3
Chapter 2. Specifi cation
2-1. Specifi cation list
Model LEA40T3 Screen size 40 inch Aspect ratio 16:9 Resolution 1920*1080 Response Time(ms) 6 ms Angel of view 178 Contrast 5000:1 Brightness 450cd/m2 OSD language English etc. Color system ATSC Audio system BTSC Audio output power(Built-in)(W) 9W*2 Audio output power(outer)(W) No Total power input(W) 120W Voltage range(V) 108-132V Power frequency(Hz) 60HZ Net weight(KG) 18.4 Gross weight(KG) 26 Net dimension(MM) 989*280*689 Packaged dimension(MM) 1360*290*760
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2-2. External pictures (four faces)
Service Manual
Model No.: LEA40T3
Front Side
Left Side
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Service Manual
Model No.: LEA40T3
Chapter 3. Disassemble and Assemble
3-1. Remove the Stand
1. Lay down the unit so that back cover faces
upward
Back Side
2. Remove the Five screws from the back cover which are indicated with the circles in the picture above.
3. Remove the stand
10
3-2. Remove the Power Cord
Remove the screw indicated by the red
circles in below picture.
Then remove the power cord.
Service Manual
Model No.: LEA40T3
2. Then remove the back cover from the
unit.
3-3. Remove the Back Cover
1. Remove the twenty-two screws indicated by the red circles in below picture.
3-4. Remove the Mainboard
Remove the five screws indicated by the red
circles in below picture.
Then remove the mainboard.
3-5. Remove the speaker
Remove the screw indicated by the red
circles in below picture.
Then remove the speaker.
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Service Manual
Model No.: LEA40T3
3-6. Remove the Keypad
The Keypad is conglutinated with front frame
, just uncover the keypad gently.
Then remove the keypad.
3-8. Remove the Stand backstop
Remove the six screws indicated by the red
circles in below picture.
Take out the stand backstop.
3-7. Remove the Remote Control Board
Remove the screw indicated by the red
circles in below picture.
Take out the remote control board.
3-9. Remove the indicator light
The indicator light is buckled into the front frame,remove the clasp indicated by the red circles in below picture.
Take out the indicator light.
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Service Manual
Model No.: LEA40T3
Chapter 4. Location of Controls and Components
4-1. Board Location
A
B
C
No. Parts number Description
A Board CPANEL
B Board /Power Board
C Board MMainboard
4-2. Main Board
CND3
CNA1
CNE2
CND4
CND5
CON2
CNE1
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Service Manual
Model No.: LEA46T3
4-2-1. Function Description:
Main Board Process signal which incept from exterior equipment then translate into signal that panel can display.
4-2-2. Connector defi nition
Main board connector
Speaker connector (CON2)
Pin number Signal name
1 LOUT+ 2 LOUT­3 ROUT­4 ROUT+
12V/5V Connector (CNA1)
Pin number Signal name
1 +12V 2 +12V 3 GND 4 +12V 5 GND 6 GND 7 5VSTB 8/
9 GND 10 PW-ON/OFF 11 PB-ADJUS 12 PB-ON/OFF
Keypad Connector (CNE2)
Pin number Signal name
1 GND 2 KEY1 3 KEY0 4 3.3VS
Rom connector (CNE1)
Pin number Signal name
1 5VS 2IR 3 LED-R 4 LED-G 5 GND
4-3. Power Supply Board
4-3-1. Function description:
To supply power for Mainboard, Panel.
4-3-2. Connector defi nition:
INPUT CONNECTOR (CN10)
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Service Manual
Model No.: LEA40T3
Pin number Signal name
1 +12V 2 +12V 3 GND 4 +12V 5 GND 6 GND 7 +5VSB 8 EXT_DIM
9 GND 10 PS-ON 11 INT_DIM 12 BL_ON
CNM801
4-4. LCD Panel
CN2
CN1
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Service Manual
Model No.: LEA40T3
4-4-1. Function Description: Display the signal.
4-4-2. Connector defi nition:
CN1 Connector
Pin number Symbol Description
1 12V DC Power Supply
2 12V DC Power Supply
3 12V DC Power Supply
4 12V DC Power Supply
5 12V DC Power Supply
6NC NC
7 GND Ground
8 GND Ground
9 GND Ground
st ,5th
10 Rx1[0]N 1
11 Rx1[0]P 1
12 Rx1[1]N 1
13 Rx1[1]P 1
14 Rx1[2]N 1
15 Rx1[2]P 1
LVDS Signal -
st ,5th
LVDS Signal +
st ,5th
LVDS Signal -
st ,5th
LVDS Signal +
st ,5th
LVDS Signal -
st ,5th
LVDS Signal +
16 GND Ground
st ,5th
17 Rx1CLK- 1
18 Rx1CLK+ 1
LVDS Clock -
st ,5th
LVDS Clock +
16
19 GND Ground
st ,5th
20 Rx1[3]N 1
21 Rx1[3]P 1
22 Rx1[4]N 1
23 Rx1[4]P 1
LVDS Signal -
st ,5th
LVDS Signal +
st ,5th
LVDS Signal -
st ,5th
LVDS Signal +
24 GND Ground
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