Technical description and composition of the THOMSON T24E20DH-01W TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: T24E20DH-01W T24E20DH-01B
Chassis / Version: TP.MS3463S.PA583
Panel: LVW240CMDX E8 V11
LED backlight: TCL-240D-2X4 1028 4CT-LB240T-DL1
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP3398A
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: TP.MS3463S.PA583 3MS463LC1EU-01
IC MainBoard: SPI FLASH: GD25Q64
Tuner: CDT-9NT372-RF01
Specifications T24E20DH-01W
THOMSON T24E20DH-01W
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- THOMSON T24E20DH-01W does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
A malfunction in such cases should be looked for in the elements of the power supply - the mains voltage converter (AC / DC), which is located on the main board MainBoard TP.MS3463S.PA583. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (TO-252) and rectifier diodes for possible partial or complete breakdown.
In the event of diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse and / or the current sensor in the source of the key usually 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 regulators (PWM) PWM SOT23-6, if they do not have visible damage to the case and an open short circuit between the pins, are usually checked by replacing.
- There is no picture, but there is sound and all other TV functions are working. The image sometimes appears for a second immediately after switching on and disappears.
Often in such cases, there is no backlighting of the LED panel. Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips, but sometimes the LED driver is also faulty.
To check the LED strips for breakage without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter; a voltage of the order 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 TP.MS3463S.PA583 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). Repair of the board and replacement of SPI FLASH: GD25Q64 microcircuits are made if the necessary equipment and the corresponding element base are available. Failures associated with the use of BGA soldering technologies can be localized by warming up.
Before replacing the CDT-9NT372-RF01 tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus.
If THOMSON T24E20DH-01W has no picture, but there is sound, often the backlight of the LVW240CMDX E8 V11 display 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 LVW240CMDX 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 TP.MS3463S.PA583 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 MainBoard TP.MS3463S.PA583 with an oscilloscope, as well as synchronizing signals to 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.
Attention to users! Self-repair of the THOMSON T24E20DH-01W TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON T24E20DH-01W, T24E20DH-01B, Main: TP.MS3463S.PA583, Panel: V236BJ1-P01
To reduce the backlight current, you should proportionally increase the total resistance of the resistors relative to the case at the ISET pin of the MP3398A controller. ISET (Current Setting) - Pin 8 in SOIC-20 package or Pin 6 in SOIC-16 package.
Additional MainBoard RepairThe appearance of the MainBoard TP.MS3463S.PA583 is shown in the figure below:
TP.MS3463S.PA583
The main features of the THOMSON T24E20DH-01W device:
Installed matrix (LED-panel) LVW240CMDX E8 V11.
To power the backlight LEDs, a converter combined with the main board TP.MS3463S.PA583 is used, it is controlled by the PWM controller MP3398A. TO-252 switches are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using SOT23-6 PWM microcircuits and TO-252 type power switches.
MainBoard - the main board (motherboard) is a TP.MS3463S.PA583 module, using SPI FLASH chips: GD25Q64 and others.
The CDT-9NT372-RF01 tuner provides reception of television programs and tuning to channels.
LED TV THOMSON T24E20DH-01W with LCD LVW240CMDX, diagonal size 24 "(61 cm) 16: 9 format. The declared brightness of the screen 180 cd / m2 is provided by modern LED backlight LED. The ratio of maximum brightness to minimum (contrast) is not less than 3000: 1 LCD panel uses direct backlighting with LED backlighting - Direct LED Can be viewed in HD quality at 1366x768 pixels in 720p standard (HD Ready) Media formats supported: MP3, MPEG4, HEVC (H. 265), Xvid, MKV, JPEG.
The power of the sound system is 6 W (2x3 W), 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), SCART, VGA, HDMI, MHL, USB. A headphone jack is provided. The digital tuner has the ability to receive television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: with stand 553x380x134 mm, without stand 553x332x80 mm.
TV weight: without stand: 2.65 kg.
Attention! The LVW240CMDX E8 V11 panel of the THOMSON T24E20DH-01W 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.