Technical description and composition of the THOMSON T40E53DHU TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: T40E53DHU
Chassis / Version: MT10T
Panel: LVF400NE2L SJUW00
LED driver (backlight): 40-RT4311-DRA2XG
PWM LED driver: MAP3204
Power Supply (PSU): 40-E371C4-PWG1XG PE371C4
PWM Power: FAN7930C, FSFR1700XS, VIPER17L
MainBoard: 40-MT10T2-MAB2HG
IC MainBoard: MT5310CDOU, MT5135AE, H5T02G63DFR, MX25L12845EMI-10G, CXD2820R
Tuner: DT21WN
Specifications T40E53DHU
THOMSON T40E53DHU
General recommendations for TV LCD LED repair
Possible manifestations of defects
- THOMSON T40E53DHU does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
In such cases, you should start looking for a fault in the 40-E371C4-PWG1XG power supply circuits. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short-circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and, less often, the current sensor in the source of the key.
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 and reaction to commands from the remote control. Or the image appears immediately after switching on and disappears.
In some of these cases, the malfunction is caused by the lack of display backlighting. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
It should be remembered that it is not possible to determine an open circuit in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then you need to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow opening the LED in the forward direction or dual LEds are used, then the PN transition of the emergency zener diode can indirectly serve as an indicator of serviceability. In the event of a malfunction of the LED-a, the PN-junction of the zener diode will either be cut off or broken into the K / Z.
- The indicator blinks or is on constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 40-MT10T2-MAB2HG 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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its MT5310CDOU, MT5135AE, H5T02G63DFR, MX25L12845EMI-10G, CXD2820R and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
In cases where there is no tuning to terrestrial or cable TV channels, you should make sure that the software is correct, as well as that the supply voltages on the DT21WN tuner terminals are in compliance. 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.
If THOMSON T40E53DHU has no picture, but there is sound, often the LVF400NE2L SJUW00 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 LVF400NE2L LCD panel - a process that requires experience and qualifications from the master. 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 you can see light 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-MT10T2-MAB2HG often turns out to be faulty, a software failure is also possible.
Then, first of all, it is necessary to check the panel supply voltage, 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 trace the passage of LVDS signals from MainBoard 40-MT10T2-MAB2HG with an oscilloscope, 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.
Users and owners of TVs should remember that attempts to self-repair a THOMSON T40E53DHU TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 440-E371C4-PWA1XG Power supply
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON T40E53DHU MT10T, Main: 40-MT10T2-MAB2HG, Panel: LVF400NE2L SJUW00
The appearance of the MainBoard 40-MT10T2-MAB2HG is shown in the figure below:40-MT10T2-MAB2HG
40-MT10T2-MAB2HG can be used in TVs:
MYSTERY MTV-3225LT2 (Panel 720p HD 1366x768), THOMSON T32E53DU (Panel LVW320NEAL CJUW01 V2), THOMSON T40E53DHU (Panel LVF400NE2L SJUW00).
External view of the power supply
The main features of the THOMSON T40E53DHU device:
Installed matrix (LED panel) LVF400NE2L SJUW00.
The LED driver 40-RT4311-DRA2XG is used to power the backlight LEDs and is controlled by the MAP3204 PWM controller.
The formation of the necessary supply voltages for all nodes of the THOMSON T40E53DHU TV is carried out by the 40-E371C4-PWG1XG power module, or its analogs using FAN7930C, FSFR1700XS, VIPER17L microcircuits.
MainBoard - the main board (motherboard) is a 40-MT10T2-MAB2HG module, using MT5310CDOU, MT5135AE, H5T02G63DFR, MX25L12845EMI-10G, CXD2820R and others.
The DT21WN tuner provides reception of television programs and tuning to channels.
LED TV THOMSON T40E53DHU with LCD LVF400NE2L, diagonal size 40 "(102 cm) 16: 9 format. The declared brightness of the screen of 400 cd / m2 is provided by modern LED backlight LED. - Edge LED. The design and technical capabilities of the TV allow viewing in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Digital signal formation (graphic format ) is produced in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported multimedia formats: MP3, MPEG4, JPEG.
Speaker power 16 W (2x8 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), component, SCART, RGB, VGA, HDMI x3, USB. A headphone jack is provided. A standard VGA (D-Sub 15) connector is used to connect a laptop or computer. This interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768. The digital tuner has the ability to receive television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV from the network in operating mode is not more than 90 watts.
Attention! The LVF400NE2L SJUW00 panel of the THOMSON T40E53DHU 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.