Haier LE50B7000 User manual

SERVICE MANUAL
LED TV
TSUMV59XU
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.
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LE50B7000

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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 (speci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
1-4. How to Read this Service Manual ............................................6
Using icons ...............................................................................................................6
Chapter 2. Specication
2-1. Specication list.........................................................................8
2-2. External pictures (four faces)....................................................9
Chapter 3. Disassemble and Assemble
3-1. .................................................................................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 denition ..............................................................................14
4-3. Power Supply Module ..............................................................15
4-3-1. Function Description .............................................................................15
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4-3-2. Connector denition ..............................................................................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. T.VST59 software update ....................................................................34
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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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.
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 re, do not expose this TV set to rain
or excessive moisture. This TV must not be exposed to dripping or splashing water, and objects
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
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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 (specied parts)
Special parts which have purposes of 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 specied parts shown in
the parts list.
Safety Component
● Components identied by mark have special characteristics important for safety.
1-3-6 Safety check after repairment
Con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
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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 ammable mixture.
Unless speci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.
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 xtures specied in this service manual.
CAUTION: Do not connect the test xture 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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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
classied as "anti-static" can generate electrical charges suf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: 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 oor can generate static electricity sufcient 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 specic 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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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 nd additional information on a specic topic.
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Model
Screen Size
50"
Aspect Ratio
16:9
Resolution
1920x1080
Brightness (cd/m²)
Contrast
00:1
Response Time (ms)
8
Angel of View
H:170°, V:160°
Color Display
16.7M
OSD Language
English,
Color System
Audio System
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)
Gross Weight (KG)
Net Dimension (MM)
x x
Packaged Dimension (MM)
TBD
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Chapter 2. Specication
2-1. Specication list
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15
LE50B7000
250
SECAM
B G
10.9
14.5
1125 685 249
Arabic,French

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2-2. External pictures (four faces)
Front Side
Up Side
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Right Side
Back Side
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Chapter 3. Disassemble and Assemble
3-1. LE50M660
3-1-1. Remove the Stand
3-1-3. Remove the Mainboard
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.
3-1-4. 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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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
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C Panel
B Board
A Board
B
LE50B7000
No.
Parts
Description
A Board
Power Supply Module
B Board
T.VST59.A5
Mainboard
C Panel
AUO
LCD Panel
HKL-500201
T500HVN07.1

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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 denition
14
IR & Key Interface
CN7
Pin number
Signal name
1
5V
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
Inverter connector CN6
Pin number
Signal name
1
12V
2
12V
3
BLO
4
ADJ
5
GND
6
GND
Speaker connector CNA1
Pin number
Signal name
1
ROUT+
2
ROUT-
3
LOUT-
4
LOUT+
LE50B7000

CON3 CON4
LED driver connector
Pin number
Signal name
1
+
2
-
3
NC
+
Backlight adjust connector
1
BL_ON
2
ADJ
3
GND
AMP power connector
1
GND
2
GND
3
VCC
4
VCC
Mainboard power supply
connector
Pin number
Signal name
1
12V
2
12V
3
GND
4
GND
5
5V
6
5V
7
GND
8
GND
9
STB
10
5VSB
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4-3. Power Supply Module
4-3-1. Function Description
To supply power for Mainboard, Panel.
4-3-2. Connector denition
CN1 is the Power cord connector.
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CON3 CON4
CON2
JP2
JP1
CON3 CON4
JP2
CON2
JP1
-
1
2
NC
3
-
CON2

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4-4. LCD Panel
Backlight Unit
LVDS CONNECTOR CN1
Connector Denition
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PSIZE
Batteries
Remote
Control
5-1.
Accessories
Service Manual
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5-2. External Equipment Connections
Antenna Connection
Connect your aerial to the back of the TV into the
ANTENNA IN socket.
Improve Your Signal
To improve picture quality in a poor signal area, use a
signal amplier (not supplied).
Connect Your PC to the TV
Connect a DVD Player or VCR to
Your TV
There are two ways in which you can connect a DVD
player or VCR to your TV. Make sure that both the TV
and DVD player or VCR are switched off before you
connect them.
HDMI Input
You can use your TV as a monitor for your personal
computer by connecting it with a VGA cable (not
supplied).
A
Connect the cable from the HDMI device to the TV
HDMI socket.
A
B
Read your computer user guide and check it has a
VGA connector.
Turn off your TV and PC.
B
C
Press the SOURCE button to select HDMI mode.
Refer to the HDMI device user guide for how to
operate.
C
Connect a D type 15-pin VGA interface cable to the
VGA video interface connector on the PC. Connect
the other end of the cable to the PC interface
connector on the TV. Tighten the screws on the
D
E
VGA connectors and connect the audio cable (not
supplied) to the audio input socket on the back of the
TV.
Turn on the TV rstly and then the PC.
Press the Source button on the TV or TV remote
control to set the video input mode to PC.
F
Once the image shows, if there is noise present,
change the PC mode to other resolutions, change the
refresh rate to other rate or adjust the brightness and
contrast on the menu until the picture is clear.
Connect a DVD Player to Your TV
Connect the DVD video outputs (Y, Pb, Pr) to the
COMPONENT (Y, Pb, Pr) IN socket on your TV.
A
B
C
Turn on the DVD player and insert a DVD disk.
Press the SOURCE button to select COMPONENT
mode.
Refer to the DVD player user guide for operating
instructions.
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