Haier LE50D3505 Schematic
SERVICE MANUAL
LED TV
Model No. LE50D3505
MSD3393LU
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.
©2013 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.
Service Manual
Model No.: LE50D3505
CONTENTS
Chapter 1. General Information
1-1. Document Information ..............................................................3
1-2. General Guidelines.....................................................................3
1-3. Important Notice.........................................................................3
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 (specified 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
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. .................................................................................11
50D3505b
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. Power Supply Module ..............................................................15
4-3-1. Function Description .............................................................................15
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Model No.: LE50D3505
4-3-2. Connector definition ..............................................................................15
4-4. LCD Panel ..................................................................................16
Chapter 5. Installation Instructions
5-1. Accessories ..............................................................................18
5-2. External Equipment Connections............................................19
Chapter 6. Operation Instructions
6-1. Front Panel Controls.................................................................20
6-2. Back Panel Controls .................................................................21
6-3. Setting Up Your Remote Control .............................................22
Chapter 7. Electrical Parts
7-1. Block Diagram............................................................................23
7-2. Circuit Diagram..........................................................................30
Chapter 8. Measurements and Adjustments
8-1. Service Mode ............................................................................31
8-1-1.How to enter into Service Mode............................................................ 31
8-1-2.How to exit ............................................................................................31
8-2. Measurements and Adjustments ............................................31
8-2-1. The Main Menu ....................................................................................31
8-2-2. General Setting ....................................................................................32
8-2-3. Picture ..................................................................................................32
8-2-4. Sound................................................................................................... 33
8-2-5. Debug...................................................................................................33
8-3. Software Update ......................................................................34
8-3-1. software update ....................................................................34
3393.72B
Chapter 9. Trouble shooting
9-1. Simple check ...........................................................................35
9-2. Mainboard IC Introduction......................................................38
9-3. Mainboard Failure Check........................................................39
9-4. Pannel Failure..........................................................................45
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Service Manual
Model No.: LE50D3505
Chapter 1. General Information
1-1. Document Information
Document format: Adobe PDF
Author: Gao Bingbing
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.
1-3-2. Be careful to the electrical shock
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)
This symbol indicates that there are important operating and maintenance instructions
in the literture accompanying the appliance.
To prevent damage which might result in electric shock or fire, do not expose this TV set to rain
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such
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Service Manual
Model No.: LE50D3505
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
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
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Model No.: LE50D3505
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 nonabrasive 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.
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.
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Model No.: LE50D3505
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.
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Model No.: LE50D3505
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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Chapter 2. Specification
2-1. Specification list
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Model LE50D3505
Screen Size 50"
Aspect Ratio 16:9
Resolution 1920x1080
Brightness (cd/m²) 300
Contrast 3000:1
Response Time (ms) 8
Angel of View H:178°, V:168°
Color Display 16.7M
OSD Language English,French,Spanish.
Color System NTSC
Audio System M
Audio Output Power (Built-in) (W) 10W×2
Audio Output Power (outer) (W) No
Total Power Input (W) 150W
Voltage Range (V) AC100V~240V
Power Frequency (Hz) 50~60Hz
Time of Sleep Timer (MINS) 240Min
Net Weight (KG) 33.7
Gross Weight (KG) 38.7
Net Dimension (MM) 44.92" x 27.05" x 2.76"
Packaged Dimension (MM) TBD
Service Manual
Model No.: LE50D3505
2-2. External pictures (four faces)
Front Side
Up Side
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Right Side
Back Side
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Model No.: LE50D3505
Chapter 3. Disassemble and Assemble
3-1. LE50D3505
3-1-1. Remove the Stand
1. Remove the six screws indicated with red
circles.
2. Remove the Mainbord.
1. Lay down the TV set .
2. Remove the four screws from the stand which
in the picture above.
3. Remove the stand.
3-1-3. Remove the Mainboard
3-1-4. Remove the Power Supply Module
3-1-2. Remove the Back Cabinet
1. Remove the six screws indicated with
red circles in below picture.
2. Remove the Power Supply Module.
3-1-5. Remove the Speaker
Remove the Speaker indicated by red circle in
below picture.
1.Remove the twenty-six screws indicated with red
circles.
2. Flip machine, panel side up.
3.Carefully raise the Front shell from
bottom.
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Model No.: LE50D3505
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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Model No.: LE50D3505
Chapter 4. Location of Controls and Components
4-1. Board Location
13
A Board
No. Parts number Description
A Board Power Supply Module
B Board Mainboard
C Panel LCD Panel
6007460228
DH1TKRM0002M
712-500E8-V4280
C Panel
B Board
Service Manual
Model No.: LE50D3505
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
IR & Key Interface
CN6
Pin number Signal name
1
2 RED
3 GRE
4 IR
5 GND
6 K0
7 K1
8 K2
9 K3
10 K4
11 K5
12 K6
13 K7
14 GND
14
5V
Inverter connector CN2
Pin number Signal name
1
2
3
4
5
6
12V
12V
BLO
ADJ
GND
GND
Speaker connector CN18
Pin number Signal name
1
2 ROUT-
3 LOUT-
4 LOUT+
ROUT+
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Model No.: LE50D3505
4-3. Power Supply Module
4-3-1. Function Description
To supply power for Mainboard, Panel.
4-3-2. Connector definition
CN6
CN5
CN1
CN4
CN9
Mainboard power supply
connector CN5
Pin number Signal name
1 12V
2 12V
3 GND
4 GND
5 5V
6 5V
7 GND
8 GND
9 STB
10 5VSB
CN1 is the Power cord connector.
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LED driver connector
CN9
Pin number Signal name
1 +
2 3 NC
4 +
5 -
Backlight adjust connector
CN6
1 BL_ON
2 ADJ
3 GND
AMP power connector CN4
1 GND
2 GND
3 VCC
4 VCC
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