Technical description and composition of the THOMSON 32HU5253 TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: 32HU5253 32HU5253W
Chassis / Version: MT10B
Panel: 08-SS32TML-LC225AA
T-CON: LSC320AN01-803
LED driver (backlight): 40-RT3210-DRF2XG
PWM LED driver: MAP3204
MOSFET LED driver: TK8P25DA
Power Supply (PSU): 40-P081C0-PWD1XG
PWM Power: VIPER17L, FAN6754
MainBoard: 40-MT10B2-MAC2HG
IC MainBoard: MT5310CHOU-BMSL
Tuner: TDTK-G931D
Control: CPU: MT5310CHOU-BMSL, SPI FLASH: MX25L6445E, EEPROM: M24C32WP, H5TQ1G63DFR, TAS6707
Specifications 32HU5253
THOMSON 32HU5253
General recommendations for TV LCD LED repair
Possible malfunctions
- The THOMSON 32HU5253 TV does not turn on, does not respond to the remote control and control panel buttons, does not light or blink indicators.
Usually, with similar manifestations, the defect is caused by faulty elements in the main power module 40-P081C0-PWD1XG. Its output voltages should be measured and, in their absence, the serviceability of the power switches and rectifier diodes in the converters should be checked for possible breakdown.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse 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) VIPER17L, FAN6754, in the absence of external damage and a 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
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlight. 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.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
- 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-MT10B2-MAC2HG 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). If it is not possible to replace the MB (SSB) board, it is necessary to check the serviceability of its elements - MT5310CHOU-BMSL. Defective components must be replaced.
The malfunction of the TDTK-G931D tuner is established after checking the software and all supply voltages at its outputs. The data exchange of the tuner with the processor via the I2C bus can be monitored with an oscilloscope.
If THOMSON 32HU5253 has no picture, but there is sound, often the display backlight 08-SS32TML-LC225AA 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 LCD panel 08-SS32TML-LC225AA - 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-MT10B2-MAC2HG 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 trace the passage of LVDS signals from the MainBoard 40-MT10B2-MAC2HG with an oscilloscope, as well as synchronizing 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.
Once again, we remind TV users: you should not try to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repairs to professionals with sufficient experience in the field of electronic repair.
Additional MainBoard RepairThe appearance of the MainBoard 40-MT10B2-MAC2HG is shown in the figure below:
40-MT10B2-MAC2HG
External view of the power supply
The main features of the THOMSON 32HU5253 device:
Installed matrix (LED panel) 08-SS32TML-LC225AA.
Matrix control uses Timing Controller (T-CON) LSC320AN01-803.
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 32HU5253 TV is carried out by the 40-P081C0-PWD1XG power module, or its analogs using VIPER17L, FAN6754 microcircuits.
MainBoard - the main board (motherboard) is a 40-MT10B2-MAC2HG module, using MT5310CHOU-BMSL chips and others.
Tuner TDTK-G931D provides reception of television programs and tuning to channels.
LED TV THOMSON 32HU5253 with LCD 08-SS32TML-LC225AA, diagonal size 32 "(81 cm) 16: 9 format. The declared brightness of the screen 350 cd / m2 is provided by modern LED backlighting. The design of the LCD panel uses backlighting with an edge arrangement of LEDs - Edge LED. It is possible to view 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. Formation of a digital signal (graphic format) is made in standards 480i, 480p, 576i, 576p, 720p, 1080i Media formats are supported: MP3, WMA, MPEG4, JPEG.
Speaker power of 10 W (2x5 W) is provided by two speakers. Uses the NICAM stereo signal processing system and the Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), audio x2, component, SCART, 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 digital tuner has the ability to receive television channels in the DVB-T MPEG4, DVB-C standards.
Dimensions: with stand 720x510x210 mm, without stand 720x455x80 mm.
TV weight: with stand: 12.5 kg, without stand: 10.8 kg.
Attention! Panel 08-SS32TML-LC225AA LED TV THOMSON 32HU5253 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.