Technical description and composition of the TCL LED43D2930 TV, panel type and applicable modules. The composition of the modules.TCL LED
Model: LED43D2930
Chassis / Version: TP.MS6308.PB775
Panel: LVF430AUOT E32 V1
LED backlight: OEM43LB06_LED3030F2.1 V1.2_20160513
T-CON: T420HVN06.3 CTRL BD 42T34-C03
LED driver (backlight): integrated into MainBoard
PWM LED driver: GB98AERN
Power Supply (PSU): integrated into MainBoard
MainBoard: TP.MS6308.PB775 MS08B / G / E / FP1
IC MainBoard: Nand Flash: 29F4G08ABADA, Audio: TPA3110D
Tuner: NoName
Technical Specifications LED43D2930US
TCL LED43D2930
General repair guidelines for TV LCD LED
Possible malfunctions
- TCL LED43D2930 does not turn on, does not respond to buttons and remote control, indicators on the front panel do not light up and do not blink.
In this case, first of all, you should check the operability of the main power source - AC / DC network voltage converter, all of whose elements are located on the MainBoard TP.MS6308.PB775 board. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
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, the screen is black, there is sound, with external illumination of the screen, you can sometimes see barely noticeable outlines of the image.
The faulty usually in these cases is the backlight matrix (LED-panel). The reason may be a break in the LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the thong connectors,
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the TP.MS6308.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). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - Nand Flash: 29F4G08ABADA, Audio: TPA3110D with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the NoName tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
TV users and owners must remember that attempts to self-repair a TCL LED43D2930 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of MainBoard TP.MS6308.PB775 is shown in the figure below:TP.MS6308.PB775
Main features of the TCL LED43D2930 device:
Installed matrix (LED-panel) LVF430AUOT E32 V1.
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.MS6308.PB775, controlled by the GB98AERN PWM controller.
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 module TP.MS6308.PB775, using Nand Flash chips: 29F4G08ABADA, Audio: TPA3110D and others.
The NoName tuner provides television reception and channel tuning.
TCL LED43D2930US TV with LVF430AUOT LCD, diagonal size 43 "(109 cm) in 16: 9 format. LED TV backlighting is implemented in the technology for producing this TV model. You can watch movies in the highest possible quality UHD at a resolution of 3840x2160 pixels in 4K standard UHD.
LED43D2930US is equipped with SMART software, built-in applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. Supported media file formats: MP3, MPEG4, MKV, JPEG.
The power of the sound system 16 W (2x8 W) provide 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, component, VGA, HDMI x3, USB, Ethernet (RJ-45), Wi-Fi. 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 975x622x195 mm, without stand 975x565x74 mm.
TV Weight: with stand: 7.6 kg, without stand: 7.5 kg.
Attention! The panel of the LVF430AUOT E32 V1 LED-TV TCL LED43D2930US 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.
