Technical description and composition of the THOMSON T40E53HU TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: T40E53HU
Panel: LVF400NEAL
LED driver (backlight): 40-RT4611-DRB2XG
PWM LED driver: MAP3204T
MOSFET LED driver: D4454
Power Supply (PSU): 40-E371C6-PWG1XG
PWM Power: VIPER17L, FAN7930, NCP1397AG
MOSFET Power: MDF12N50
MainBoard: 40-MS82G0-MAC2LG
IC MainBoard: 25Q32
Tuner: TCL 18273
Control: RC3000R13
Specifications T40E53HU
THOMSON T40E53HU
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- THOMSON T40E53HU 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.
With similar manifestations, in some cases, the power module 40-E371C6-PWG1XG is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (MDF12N50) and rectifier diodes for possible partial or complete breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and less often the current sensor in the source of the key.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of the PWM regulator, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) VIPER17L, FAN7930, NCP1397AG are usually checked by replacing them with new ones, or knowingly working.
- There is no image, there is sound, it reacts to the remote control, the channels are switched. In some cases, the image appears when turned on and disappears immediately.
A malfunction is usually in these cases most likely in the backlight units of the display matrix. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is required to open PN junctions connected in series.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals the standby mode.
If the THOMSON T40E53HU has no picture, but there is sound, often the LVF400NEAL 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 LVF400NEAL 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-MS82G0-MAC2LG 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 the MainBoard 40-MS82G0-MAC2LG with an oscilloscope, as well as synchronization signals to the 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.
Repair or diagnostics of the 40-MS82G0-MAC2LG 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 25Q32 chips and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
If you suspect a malfunction of the TCL 18273 tuner, first of all, you need to make sure that the software is correct, as well as the presence of the necessary levels of supply voltages and pulses of data exchange with the processor via the I2C bus on the corresponding terminals of the tuner.
Owners of the T40E53HU TV are advised to contact only qualified specialists with the necessary experience for repair! Attempts to repair yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON T40E53HU , Main: 40-MS82G0-MAC2LG, Panel: LVF400NEAL
The appearance of the MainBoard 40-MS82G0-MAC2LG is shown in the figure below:40-MS82G0-MAC2LG
40-MS82G0-MAC2LG can be used in TVs:
THOMSON T40E53HU (Panel LVF400NEAL), THOMSON T32E53U (Panel LVF400NE2L).
External view of the power supply
The main features of the THOMSON T40E53HU device:
The matrix (LED-panel) LVF400NEAL is installed.
The LED driver 40-RT4611-DRB2XG is used to power the backlight LEDs and is controlled by the MAP3204T PWM controller. D4454 keys are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the THOMSON T40E53HU TV is carried out by the 40-E371C6-PWG1XG power module, or its analogs using VIPER17L, FAN7930, NCP1397AG microcircuits and MDF12N50 power switches.
MainBoard - the main board (motherboard) is a 40-MS82G0-MAC2LG module, using 25Q32 microcircuits and others.
Tuner TCL 18273 provides reception of television programs and tuning to channels.
LED TV THOMSON T40E53HU with LCD LVF400NEAL, diagonal size 40 "(102 cm) 16: 9 format. The design of the LCD panel uses edge LED backlighting - Edge LED. The design and technical capabilities of the TV provide 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 performed in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Multimedia formats supported: MP3, WMA, MPEG4, Xvid, 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), AV x2, audio x3, component, VGA, HDMI, USB, Bluetooth. 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.
Attention! The LVF400NEAL panel of the THOMSON T40E53HU 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.