Technical description and composition of the THOMSON T32E53U TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: T32E53U
Chassis / Version: MS82G
Panel: LVF400NE2L
LED backlight: 67-H93402-0A0
T-CON: ST3151A04-1Q
LED driver (backlight): 40-RT3210-DRF2XG
PWM LED driver: MAP3204
MOSFET LED driver: TK8P25DA
Power Supply (PSU): 40-E081C5-PWI1XG
PWM Power: OB2273A
MOSFET Power: 13A650
MainBoard: 40-MS82G0-MAC2LG
IC MainBoard: 25Q32
Tuner: TCL 18273
Control: Remote: RC3000M13
Specifications T32E53U
THOMSON T32E53U
General recommendations for TV LCD LED repair
Possible manifestations of defects
- The THOMSON T32E53U TV does not turn on, does not respond to the remote control and control panel buttons, does not light or blink indicators.
In such cases, the fault should be looked for primarily in the 40-E081C5-PWI1XG power module. Its output voltages should be measured and, in their absence, the power switches (13A650) and rectifier diodes should be checked for the probability of a short circuit in the converters.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short-circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key most often breaks off.
The breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) OB2273A, if they have no visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and immediately disappears
In some of these cases, the malfunction is caused by the lack of display backlighting. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
If THOMSON T32E53U has no picture, but there is sound, often the LVF400NE2L 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-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.
To test the LED strips, in order to open all the transitions of the LEDs, several tens of volts or more are needed; it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED junctions in forward bias, you can sometimes detect the presence of a protective zener diode PN junction by connecting the probes in the opposite direction. If the zener diode is cut off or broken in K / Z, then the LED is faulty and needs to be replaced.
- 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-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). Repair of the board and replacement of 25Q32 microcircuits are carried out if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by the warm-up method.
Before replacing the TCL 18273 tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its outputs. You also need to make sure that the tuner and processor can exchange data via the I2C bus
Attention to users! Self-repair of the THOMSON T32E53U TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON T32E53U, Main: 40-MS82G0-MAC2LG, Panel: LVF400NE2L
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 T32E53U device:
The matrix (LED panel) LVF400NE2L is installed.
Matrix control uses the ST3151A04-1Q Timing Controller (T-CON).
The LED driver 40-RT3210-DRF2XG is used to power the backlight LEDs, it is controlled by the PWM controller MAP3204. TK8P25DA keys are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the THOMSON T32E53U TV is carried out by the 40-E081C5-PWI1XG power module, or its analogs using OB2273A microcircuits and 13A650 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 T32E53U with LCD LVF400NE2L, diagonal size 32 "(81 cm) 16: 9 format. The declared brightness of the screen of 300 cd / m2 is provided by modern LED backlight LED. The ratio of maximum brightness to minimum (contrast) is not less than 4000 : 1. The LCD panel uses Edge LED backlighting. You can view in high quality HD at a resolution of 1366x768 pixels in 720p standard (HD Ready). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. The digital signal (graphic format) is formed in the 480i, 480p, 576i, 576p, 720p, 1080i standards, and the multimedia formats are supported: MP3, JPEG.
Speaker power of 10 W (2x5 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, component, 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, 1360x768.
The power consumed by the TV from the network in the operating mode is not more than 60 W.
Dimensions: with stand 730x494x183 mm, without stand 730x439x60 mm.
TV weight: 8.3 kg.
Attention! The LVF400NE2L panel of the THOMSON T32E53U 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.
