Technical description and composition of the THOMSON LE40D3260 TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: LE40D3260
Chassis / Version: MA1
Panel: LTA400HM13
T-CON: AMLCD L0F6041T0B-01
Power Supply (PSU): 40-E461C0-PWG1XG
PWM Power: FAN7930C, FSFR1700XS, VIPER17L
MOSFET Power: K12A50D
MainBoard: 40-MS48S1-MAD2XG
IC MainBoard: Cpu - MST6M48RVS-LF-Z1-TZ, SPI Flash: Q32-100HIP, EEPROM: 24C64
Tuner: F25WT-38-E
Specifications LE40D3260
THOMSON LE40D3260
General recommendations for TV LCD LED repair
Possible manifestations of defects
- THOMSON LE40D3260 TV does not turn on at all. No response to the remote control and front panel control buttons. Indicator lamps do not light up or flash.
Most likely, in this case, the main switching power supply (SMPS) 40-E461C0-PWG1XG is faulty. It is then necessary to measure its output voltages and, if they are absent, the power switches (K12A50D) and rectifier diodes of the converters should be checked for the probability of a short circuit.
In the event of diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse and / or the current sensor in the source of the key usually breaks off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) FAN7930C, FSFR1700XS, VIPER17L, in the absence of external damage and short circuit between the terminals, are checked by replacing them with known good ones.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
Often in such cases, there is no backlighting of the LED panel. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and it is unsafe for them to use any voltage sources above 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Usually, Chinese multimeters with 9V power supply lightly light one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the K / Z.
- The TV does not turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the 40-MS48S1-MAD2XG motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Often the MB (SSB) board must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - Cpu - MST6M48RVS-LF-Z1-TZ, SPI Flash: Q32-100HIP, EEPROM: 24C64 and replace failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
If THOMSON LE40D3260 has no picture, but sound, often the LTA400HM13 display backlight simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the LTA400HM13 LCD panel, a process that requires experience and qualifications from the technician. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV, light can be seen through the holes in the panel case.
In this case, the panel may also be faulty - damage to the strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard 40-MS48S1-MAD2XG often turns out to be faulty; a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, it is necessary to use an oscilloscope to trace the passage of LVDS signals from MainBoard 40-MS48S1-MAD2XG, as well as synchronization signals to loops with drivers.
Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.
If there is no tuning for terrestrial or cable TV channels, you should make sure that the software is correct, as well as that the supply voltages on the terminals of the F25WT-38-E tuner match. It is also necessary to check with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.
We remind users again! Attempts to repair a THOMSON LE40D3260 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON LE40D3260 MA1, Main: 40-MS48S1-MAD2XG, Panel: LTA400HM13
40-MS48S1-MAD2XG
External view of the power supply
The main features of the THOMSON LE40D3260 device:
Installed matrix (LED panel) LTA400HM13.
Matrix control uses the AMLCD Timing Controller (T-CON).
The formation of the necessary supply voltages for all nodes of the THOMSON LE40D3260 TV is carried out by the 40-E461C0-PWG1XG power module, or its analogs using FAN7930C, FSFR1700XS, VIPER17L microcircuits and K12A50D power switches.
MainBoard - the main board (motherboard) is a 40-MS48S1-MAD2XG module, using Cpu chips - MST6M48RVS-LF-Z1-TZ, SPI Flash: Q32-100HIP, EEPROM: 24C64 and others.
The F25WT-38-E tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400HM13
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare
Brightness: 400 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
THOMSON LE40D3260 LED TV with LCD LTA400HM13, diagonal size 40 "(102 cm) 16: 9. The LCD panel uses edge LED backlighting. You can view it in high quality HD at a resolution of 1366x768 pixels. in the 720p standard (HD Ready) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. The digital signal formation (graphic format) is performed in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Multimedia formats are supported: MP3, MPEG4, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. Uses the NICAM stereo signal processing system and the Sound Surround function.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), SCART, HDMI x2, USB. A standard VGA (D-Sub 15) connector is used to connect a laptop or computer. This interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768.
Overall dimensions: without stand 951x591x57 mm.
TV weight: without stand: 18.5 kg.
Attention! The LTA400HM13 panel of the THOMSON LE40D3260 LED TV is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.