Technical description and composition of the TCL LED43D2900 TV, panel type and applicable modules. The composition of the modules.TCL LED
Model: LED43D2900
Chassis / Version: TP.S512.PB775
Panel: T430HVN02.0 // LVF430AUOT
T-CON: T420HVN06.3 CTRL BD 42T34 C03
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
MainBoard: TP.S512.PB775
IC MainBoard: 25Q64CSIG, GB98AERN, TPA3110LD2, RT5047B
Tuner: R840 Rafael Micro
Technical Specifications LED43D2900
TCL LED43D2900
General repair guidelines for TV LCD LED
Possible malfunctions
- The TCL LED43D2900 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In such cases, the AC / DC converter of the mains voltage, which is combined with the main board TP.S512.PB775, is often faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the TP.S512.PB775 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements 5Q64CSIG, GB98AERN, TPA3110LD2, RT5047B. BGA chip malfunctions are usually easy to detect by warming up.
If you suspect a malfunction of the R840 Rafael Micro tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Once again, remind users! Attempts to self-repair a TV TCL LED43D2900 without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH ---------------------> TCL LED43D2900, Main: TP.S512.PB775, Panel: LVF430AUOT
The appearance of MainBoard TP.S512.PB775 is shown in the figure below:TP.S512.PB775
TP.S512.PB775 can be used in TVs:
TCL LED40D2900 (Panel LVF400SSOT), TCL LED32D2900 LED32D2900S (Panel ST3151A05-8 Ver.2.4).
Main features of the TCL LED43D2900 device:
Installed matrix (LED-panel) T430HVN02.0 or LVF430AUOT.
The matrix control uses the Timing Controller (T-CON) T420HVN06.3.
To power the backlight LEDs, a converter is used, combined with the main board TP.S512.PB775.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit.
MainBoard - the main board (motherboard) is a TP.S512.PB775 module, using 25Q64CSIG, GB98AERN, TPA3110LD2, RT5047B and other chips.
The R840 Rafael Micro tuner provides TV reception and channel tuning.
TCL LED43D2900 TV with T430HVN02.0 LCD display, diagonal size 43 "(109 cm) in 16: 9 format. LED TV backlighting is implemented in the technology of manufacturing this TV model’s screen. The TV’s design and technical capabilities include watching broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic decomposition according to the standard 1080p (Full HD). Supported media file formats: MP3, MPEG4, MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, VGA, HDMI x2, USB x2. An output for connecting headphones is provided.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: with stand 972x619x191 mm, without stand 972x565x74 mm.
TV Weight: with stand: 7.6 kg, without stand: 7.5 kg.
Attention! The T430HVN02.0 panel of the TCL LED43D2900 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.