Technical description and composition of the THOMSON 24FU5253C TV, panel type and modules used. The composition of the modules.THOMSON
Model: 24FU5253C
Chassis / Version: MT31L1
Panel: V240AE1N01-1
Inverter (backlight): 40-RC2411-DRC2LG
PWM Inverter: MP3391
Power Supply (PSU): PE061C1
PWM Power: FAN6754
MOSFET Power: MDF10N65B
MainBoard: 40-MT31L1-MAF2HD
IC MainBoard: MT5531THNT, 25Q64, Audio: STA381BW
Tuner: DT21CN-2-E 07-350AI3-NA0G
Specifications 24FU5253C
THOMSON 24FU5253C
General recommendations for TV LCD repair
Possible manifestations of malfunctions
- The THOMSON 24FU5253C 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 PE061C1 power supply usually fails. Then we recommend measuring its output voltages and, if they are absent, you should check the serviceability of the power switches (MDF10N65B) and the rectifier diodes of the converters for a possible short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency mode in a short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse usually breaks off.
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 controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. FAN6754 PWM chips are usually checked by replacing them with new ones, or known to be working.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and immediately disappears
The defect can be caused by problems in the nodes or elements of the display backlight, or in the power supply of the lamps or the inverter.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protective circuits must be restored immediately after the repair is completed.
- The TV does not turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the 40-MT31L1-MAF2HD 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 some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - MT5531THNT, 25Q64, Audio: STA381BW with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
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 DT21CN-2-E 07-350AI3-NA0G 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.
If the THOMSON 24FU5253C has no image, but there is sound, the backlight of the V240AE1N01-1 display often 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 V240AE1N01-1 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 the light through the holes in the panel case.
In this case, the panel may also be faulty - damage to 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 often the main board MainBoard 40-MT31L1-MAF2HD also 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 normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard 40-MT31L1-MAF2HD 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 cables and panel strips.
Owners and users of the THOMSON 24FU5253C TV should remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that can lead to complete non-repairability of the device!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON 24FU5253C, Main: 40-MT31L1-MAF2HD, Panel: V240AE1N01-1
The main features of the THOMSON 24FU5253C device:
Installed matrix (LCD panel) V240AE1N01-1.
To power the backlight lamps, an inverter 40-RC2411-DRC2LG is used, controlled by the PWM controller MP3391.
The formation of the necessary supply voltages for all nodes of the THOMSON 24FU5253C TV is carried out by the PE061C1 power module, or its analogs using FAN6754 microcircuits and MDF10N65B power switches.
MainBoard - the main board (motherboard) is a 40-MT31L1-MAF2HD module using MT5531THNT, 25Q64, Audio: STA381BW and others.
Tuner DT21CN-2-E 07-350AI3-NA0G provides reception of television programs and tuning to channels.
LED TV THOMSON 24FU5253C with LCD V240AE1N01-1, diagonal size 24 "(61 cm) 16: 9 format. The design of the LCD panel uses backlighting with edge LEDs - 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 Media formats supported: MP3, JPEG.
Speaker power of 1 W (2x2 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), audio x2, component, SCART, VGA, HDMI, 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, 1920x1080. The digital tuner has the ability to receive television channels in the DVB-T MPEG4, DVB-C standards.
Dimensions: with stand 585x425x145 mm, without stand 585x380x45 mm.
TV weight: with stand: 5.15 kg, without stand: 4 kg.
Attention! The panel V240AE1N01-1 of the THOMSON 24FU5253C 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.