Technical description and composition of the DEXP F43C8000H TV, type of panel and applicable modules. The composition of the modules.DEXP LED
Model: F43C8000H
Chassis / Version: RSAG7.820.6610
Panel: NC430DUE-VUEX1
LED backlight: LM41-00211B
T-CON: T430HVN01.0 CTRL BD 43T01-C0B
LED driver (backlight): integrated into MainBoard
PWM LED driver: HOZ1GN (AP3843C)
MOSFET LED driver: 4N50C
Power Supply (PSU): integrated into MainBoard
PWM Power: OZ531TGN,
MOSFET Power: AOB7S65
MainBoard: RSAG7.820.6610
IC MainBoard: E-nand H26M31001HPR
Tuner: NoName
Control: WiFi: WN4640R
Technical Specifications F43C8000H
DEXP F43C8000H
General repair guidelines for TV LCD LED
Possible malfunctions
- The DEXP F43C8000H TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
In such cases, the main power source - the AC / DC voltage converter, which is combined with the MainBoard RSAG7.820.6610 board, may turn out to be faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (AOB7S65) 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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chips OZ531TGN are usually checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately 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.
To check the LED lines for breaks 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 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 RSAG7.820.6610 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - E-nand H26M31001HPR. Defective components should be replaced.
The failure of the NoName tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> RSAG7.820.6610 Power supply & Led-driver
The appearance of the MainBoard RSAG7.820.6610 is shown in the figure below:RSAG7.820.6610
Main features of the DEXP F43C8000H device:
Installed matrix (LED-panel) NC430DUE-VUEX1.
The matrix control uses the Timing Controller (T-CON) T430HVN01.0.
To power the backlight LEDs, a converter is used, combined with the main board RSAG7.820.6610, controlled by the HOZ1GN PWM controller (AP3843C). As power elements of the LED driver, keys of the 4N50C type are used.
The power module is combined with the MainBoard and is designed according to a flyback AC / DC voltage converter with the use of OZ531TGN microcircuits, and power switches of the AOB7S65 type.
MainBoard - the main board (motherboard) is an RSAG7.820.6610 module, using E-nand H26M31001HPR chips and others.
The NoName tuner provides television reception and channel tuning.
DEXP F43C8000H TV with LCD display NC430DUE-VUEX1, diagonal size 43 "(109 cm) in 16: 9 format. The required brightness of the screen is 250 cd / m² LED backlight LED. Contrast - the ratio of maximum brightness to minimum is 3000: 1. The LCD panel uses direct pixel illumination with rear LEDs - Direct LED.The TV features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in the graphic resolution of the standard 1080p (Full HD).
The F43C8000H is equipped with SMART software, embedded applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
The power of the speaker system of sound 14 W (2x7 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, HDMI x3, MHL, USB x2, 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.
The power consumed by the TV working in the network mode is 80 watts.
Overall dimensions: with stand 971x611x192 mm, without stand 971x570x87 mm.
TV Weight: with stand: 9.2 kg, without stand: 9.1 kg.
Attention! The NC430DUE-VUEX1 panel of a DEXP F43C8000H 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.
