Technical description and composition of the THOMSON T32E04DU TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: T32E04DU T32E04DU-01B
Chassis / Version: HK-T.SP9202V54
Panel: A320HE2A04-11
T-CON: T-CON MT3151A04-1-XC-9
LED driver (backlight): integrated into PSU
PWM LED driver: MP3394S
MOSFET LED driver: APM1105N, AOD442
Power Supply (PSU): SHG3206A-101H
PWM Power: LD7750RGR, MC34063A
MainBoard: HK-T.SP9202V54
IC MainBoard: CPU: SPV9202BD, Spi Flash: 25Q32BSIG
Tuner: NoName
Specifications T49D21SF-01B
THOMSON T32E04DU
General recommendations for TV LCD LED repair
Possible manifestations of defects
- THOMSON T32E04DU does not turn on, indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Often in such cases, the SHG3206A-101H power supply module is faulty. It is then necessary to measure its output voltages and, in their absence, the power switches and rectifier diodes of the converters should be checked for the probability of a short circuit.
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.
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) LD7750RGR, MC34063A, 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 image, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlight. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
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.
If THOMSON T32E04DU has no picture, but there is sound, often the 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 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 often the main board MainBoard 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 normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard 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.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the HK-T.SP9202V54 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) elements of the MainBoard - CPU: SPV9202BD, Spi Flash: 25Q32BSIG. In cases where a BGA processor is used, its malfunction is usually detected by a local warm-up method.
Before changing the tuner NoName, if it is not possible to tune to television channels, you should make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be monitored with an oscilloscope
Attention! Users and owners of T32E04DU TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that can lead to complete non-repairability of the device.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON T32E04DU T32E04DU-01B, Main: HK-T.SP9202V54, Panel: A320HE2A04-11
To reduce the backlight current in LED drivers with an MP3394S (MP3394) controller, increase the resistance of the resistor from pin 6 (ISET) to the case. The maximum current in each channel (in milliamperes) for the resistor Rset (in kilo-ohms) is determined from the ratio 790 * 1.23V / (Rset + 0.4).
Additional MainBoard RepairThe appearance of the MainBoard HK-T.SP9202V54 is shown in the figure below:
HK-T.SP9202V54
HK-T.SP9202V54 can be used in TVs:
THOMSON T40E04DHU-01B (Panel LVF400SSDX E7 V3), THOMSON T50E80DHU (Panel V500HJ1-LE1 REV.C1), THOMSON T32E04DU T32E04DU-01B (Panel A320HE2A04-11).
External view of the power supply
The main features of the THOMSON T32E04DU device:
Installed matrix (LED panel) A320HE2A04-11.
Matrix control uses the T-CON Timing Controller (T-CON).
A converter combined with a power supply is used to power the backlight LEDs, and is controlled by the MP3394S PWM controller. As the power elements of the LED driver, keys of the APM1105N, AOD442 types are used.
The formation of the necessary supply voltages for all nodes of the THOMSON T32E04DU TV is carried out by the SHG3206A-101H power module, or its analogs using LD7750RGR, MC34063A microcircuits.
MainBoard - the main board (motherboard) is a HK-T.SP9202V54 module, using CPU chips: SPV9202BD, Spi Flash: 25Q32BSIG and others.
Tuner NoName provides reception of television programs and tuning to channels.
LED TV THOMSON T32E04DU with LCD, diagonal size 49 "(124 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 4000: 1 LCD panel uses Direct LED backlighting The design and technical capabilities of the TV allow viewing in high quality HD at a resolution of 1920x1080 pixels in graphics resolution in 1080p (Full HD). Supported media formats: MP3 , MPEG4, HEVC (H.265), Xvid, MKV, JPEG.
Speaker power of 10 W (2x5 W) is provided by two speakers. Uses NICAM stereo processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, VGA, HDMI x3, USB x2. A headphone jack is provided. The digital tuner has the ability to receive television channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
Overall dimensions: 1106x701x274 mm.
TV weight: 10.7 kg.
Attention! The panel of the THOMSON T32E04DU 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.