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SERVICE MANUAL
LED TV
Model No.
TP.S512.PB83
LE40B7000TF
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 w arnings 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 ex perienced professional technicians. Any attempt to service or repair
the product or products dealt w ith in this service infor mation by anyone else could result in serious injury or death.
Document format: Adobe PDF
Author: shouwang.wen
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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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).
LE40B7000TF
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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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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1-3-7. Ordering Spare Parts
1-3-8. Photo used in this manual
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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
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.)
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.
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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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
Screen Size 40"
Aspect Ratio 16:9
Resolution 1920x1080
Brightness (cd/m²) 280
Contrast 1500:1
Response Time (ms) 8
Angel of View H:170°, V:160°
Color Display 16.7M
OSD Language English, French ect
Color System PAL/SECAM/DVB-T/C
Audio System BG/DK/I/L
Audio Output Power (Built-in) (W) 8W×2
Audio Output Power (outer) (W) No
Total Power Input (W) 100W
Voltage Range (V) AC100V~240V
Power Frequency (Hz) 50~60Hz
Time of Sleep Timer (MINS) 240Min
Net Weight (KG) 6.85
Gross Weight (KG) 8.70
Net Dimension (MM) 883.86*548.05*248.5
Packaged Dimension (MM) 972*604*156
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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.
3-1-1. Remove the Stand
3-1-2. Remove the Back Cabinet
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1. Lay down the TV set .
2. Remove the four screws from the stand which
in the picture above.
3. Remove the stand.
1.Remove the fifteen screws indicated with red
circles.
2. Flip machine, panel side up.
3.Carefully raise the Front shell from
bottom.
3-1-3. Remove the power-main board.
1. Remove the six screws indicated with red circles.
2. Then remove the side metal board and down metal board.
3. Remove the four screws indicated with red circles.
4. Remove the power-main board.
3-1-4. Remove the Speaker
Remove the speaker directly
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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 byred circle in below picture.
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Chapter 4. Location of Controls and Components
4-1. Board Location
13
B Panel
No. Parts number Description
A Board power-main board
B Panel LCD Panel
DH1U71D0M04M
2002CM39500630
A 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
IR & Key Interface
CN7
Pin number Signal name
1
2 K7
3 K6
4 K5
5 K4
6 K3
7 K2
8 K1
9 K0
10 GND
11 IR
12 GRE
13 RED
14 5V
14
GND
LED Backlight interface
CN804/CN805
Pin number Signal name
1
2
3
LED+
NC
LED-
Speaker connector CN18
Pin number Signal name
1
2 ROUT-
3 LOUT4 LOUT+
ROUT+
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4-3. LCD Panel
Backlight Unit
16
LVDS CONNECTOR CNF1
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Chapter 5. Installation Instructions
5-1. Accessories
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Remote Control
Batteries
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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 amplifier (not supplied).
Connect Your PC to the TV
You can use your TV as a monitor for your personal
computer by connecting it with a VGA cable (not
supplied).
Read your computer user guide and check it has a
A
VGA connector.
Turn off your TV and PC.
B
Connect a D type 15-pin VGA interface cable to the
C
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
VGA connectors and connect the audio cable (not
supplied) to the audio input socket on the back of the
TV.
Turn on the TV firstly and then the PC.
D
Press the Source button on the TV or TV remote
E
control to set the video input mode to PC.
Once the image shows, if there is noise present,
F
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.
Turn on the DVD player and insert a DVD disk.
A
Press the SOURCE button to select COMPONENT
B
mode.
Refer to the DVD player user guide for operating
C
instructions.
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
A
Connect the cable from the HDMI device to the TV
HDMI socket.
Press the SOURCE button to select HDMI mode.
B
Refer to the HDMI device user guide for how to
C
operate.
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Chapter 6. Operation Instructions
6-1. Front Panel Controls
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POWER
CH-
CH+
VOL-
Press to turn the TV on and off.
TV channel down.
TV channel up.
Press to decrease
the volume.
VOL+
MENU
SOURCE
Press to increase
Press to select the main menu.
Press to select the input source.
the volume.
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6-2. Back Panel Controls
1 2 3 4 5 6 7 8
9 10 11 12 13 14
1 Mini AV
2 Mini YPbPr
3 Coaxial
4 SCART
5 PC Audio
6 VGA input
7 RF
8 Earphone
9 HDMI1
10 HDMI2(ARC)
11 HDMI3
12 USB1 IN
13 USB2 IN
intput
intput
input
input
input
input
output
input
input
input
input
input
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6-3. Setting Up Your Remote Control
When using the remote control, aim it towards the remote sensor on the TV.
The way to the factory mode menu:
Step 1: Press Menu,
Step 2: Input “8893”,
System will be into the factory mode menu when 2 steps above are done.
Into Version of the main factory menu, you can see the edition of the software,
like this" BUILD TIME
Kernel Version SVN1358 ”.
8-1-2.How to exit
If you want to exit this factory menu, please press the button ”Exit” on the remote.
system will be out the factory mode menu.
8-2. Measurements and Adjustments
20140716_223045
8-2-1. The Main Menu
In factory mode menu,press up/down
button to choose the up/down item,press
right or OK button to the submenu.press
MENU button to go back.
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8-2-2. Picture Mode
Adjust the Picture Mode,Picture Curve:
4)Color;
5)Tint
8-2-3. ColorTmp Mode
4)R Offset;
5)G Offset;
6)B Offset;
7)Gamma Table.
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1)Brightness;
2)Contrast;
3)Sharpness;
Adjust the ColorTmp Mode, White Balance :
1)R Gain;
2)G Gain;
3)B Gain;
8-2-4. Audio Mode
Adjust the values of Audio Mode,
1) Treble;
2) Bass.
8-2-5. Misc
1)Burn In;
2)IF AGC;
3)IF AGC_L;
4)ATS;
5)WSS;
6)DTG Scan;
7)ADC White Balance;
8)Auto Power On;
9)Back Light;
10)LCN Switch;
11)AGC Mode.
8-2-5. VersionUsed to view detailed information of the software,
including:
1) Build Time;
2) Kernel Version;
3) BootRom Version;
4) 8051Rom Version;
5) AudioRom Version;
6) Customer SW Version;
7) HDCP Key;
8) CI Key.
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8-3. Software Update
8-3-1. SIS231C1CI software update
1. Copy the software files to a USB disk on the root directory;
2. Insert the USB disk when the AC power is off;
3. Turn on the AC power in turn to begin;
4. Turn off the AC power until the indicator light fast twinkling;
5. Pull out the USB disk and power on the television.
Note:
Do not turn off the TV while it is updating.
8-3-2. Hotel Mode
Please press MENU key first,and then press number key “1001” to enter into Hotel Mode.
Hotel lock : Set Hotel mode on/off.
Lock channel : Lock the channel which you want.
Set source : Set to the default source.
Dtv Channel Number : Set to the default channel of the DTV source.
Atv Channel Number : Set to the default channel of the ATV source. Picture Lock : Lock the picture. Key Lock : Lock the keyboard. Max Volume : Set max volume limited,this option allows you to set the max volume level. Source Lock : Lock the source menu.
Backup to USB : Backup hotel settings to USB device. Restore from USB : Restore hotel settings from USB device. Clear Lock : Clear all lock. Standby Light Power : Select the status of power on.
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Chapter 9. Trouble shooting
9-1. Simple check
No picture/ No sound
Blank screen
No sound
Poor sound
No picture on some channel
No color for some channel
program (black and white)
Spots with some or all pictures
Television is not working
Television out of control
35
Verify if the television is properly plugged
Verify if the television is properly supplied power
Verify if electricity is available.
Verify if correct signals are input
Press SOURCE button to change signal input to TV
input
Restart the television of power supply is interrupted
Press the MUTE button and verify that Mute mode is
active.
Switch to another channel to check whether the same
problem occurs.
Press the VOL+ button to see if the problem can be
solved.
Verify that the sound system is correct. Refer to the
user manual for instructions on how to adjust it.
Verify if correct channel is selected.
Adjust the antenna.
Make adjustments by Fine Tune and MANUAL Scan.
Verify that the same problem exists on other channels.
Check the picture and sound systems.
Refer to the relevant instructions in the manual to
adjust the colour.
Verify if the antennal is correctly connected.
Verify if the antennal is in good condition.
Make fine adjustment of channel.
Disconnect the television from the power supply for
10 seconds, then reconnect the television. If the
problem persists, contact an authorised after-sales
service provider for technical assistance.
Disconnect the television from power supply and 10
seconds later, connect the television to the power
supply. If the problem still exists, contact authorized
after-sales service for technical assistance.
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9-2. Mainboard IC Introduction
Top view
1
9
8
7
5 2 3 6 4
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Bottom view
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1. Voltage convertor 5V to 3.3V for SIS231C1CI (U1)—LC1117CLTR33(UL1)
2. DC/DC convertor 12V-5V for SIS231C1CI (U1)/Tuner/DDR/USB—RT7257GHZSP(UD1)
3. DC/DC convertor 12V-1.0V for SIS231C1CI (U1)—RT7237CHGSP(UD4)
4. DDR—NT5CB64M16FP-DH(U2)
5. Mainchip—SIS231C1CI (U1)
6. Main Flash Memory— (U5)
7. voltage convertor 5V to 1.5V_DDR —LC1117CLTRAD (UL61)
8. voltage convertor 5V to 3.3V for tuner—LC1117CLTR33(UL11)
Tuner —BW21S7511A01TF(RFT1)
9. Audio Amplifier—TPA3110LD2PWPR (UA11)
Please check the Schematic Diagram for the particular support
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9-3. Mainboard Failure Check
No picture but have sound
Check the power output
Yes
No
No
Check the CN6 (INVERTER)
Backlight on/off
Change the Power Board
There’s something wrong
with FRC
Yes
Verify if the DC/DC
convertor can output the
right Voltage
No
Change the corresponding
DC/DC
Yes
No
Verify if QM2
Change the QM2
output
Yes
Still having
Change Panel
problems
Change LVDS wire
39
Yes
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No sound but have picture
Verify if the speakers are
broken
Verify if the main board has the
right input ,according to the source
you connect.
TV/COMPONENT/AV/VGA/HDMI etc.
Verify if UA1 has the right
output
Check CN17 input is right
Still having problems
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Yes
No
No
Yes
Change Mainboard
No
Change the speakers
Check the corresponding audio
input circuit you connect.
Verify if U31 has the right power in
No
Change UA1
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No sound No picture
No
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41
Verify if the Power has
5Vstb output
Yes
Verify if CN4 Pin3/4 has 5V
input
Yes
Verify if CN4 Pin1 has 12V
input
Yes
Verify if DC/DC convertors have
the right output
Yes
Change the software
No
No
No
Change the
Power supply
Change Power board
Change Power board
Change corresponding
DC/DC convertor
Still having
Problems
Change
Mainboard
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Poor sound
Poor sound
Verify if sound system is
correct .
No
Change sound
system
For ease of use, recommend that customer format the picture and
sound settings in the automatic option.
Still having
problems
Updata the software and
make the reboot; or
change the maiboard
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No color for some channel program (black and white)
No color for some chann
el program (black and w
hite)
Verify if the same
problem exists in other
channels
Yes
check out of picture
No
No
and sound system
Check out of picture and sound
system of this channel
Change the channel to the right sound
system (PAL-BG SECAM/L)
43
Yes
Refer to relative
instructions in the
Manual for color adjust
Still having
problems
Updata the software and
make the reboot; or
change the maiboard
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How to know whether the Power board is broken?
Check if the power cord co
nnect well?
Yes
Check if the Power board
No
No
Reconnect the power cord with the
outlet or Power board.
Replace the Power board pls.
output 5V and 12V ?
Still having
problems
Check if Main board / LVDS wire / Panel are in
good condition
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9-4. Pannel Failure
Failure Mode
:TCP lead cracking
:ACF bonding short
:Awful environment and
into LCD
something electric enter
Dim or L/D :TCP Sunken
Block Defect :TCP cracking or cracking
Name Description Phenomena Failure cause
V B/D Vertical bar
V Dim Vertal gray line
Part
45
Panel
:Mis-align between TCP and
:TCP failure
:Panel failure
dark forever)
Vertical color line(light or
V L/D
TCP
H B/D Horizontal bar
H Dim Horizontal gary line
dark forever)
Horizontal line(light or
H L/D
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Description Phenomena Failure Cause
Part Name
top glass
Bladder between Polarizer and
Bladder in Polarizer
Bright dot dark dot in pannel Incoming Inspection Standard