Technical description and composition of the LG 43LF510V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 43LF510V
Chassis / Version: LD55A / LD55B
Panel: HC430DUN-SLNX1-212X
LED backlight: LF51_FHD_A, COB43LF51 FHD Rev0.2 A-Type (15.3,13) LEDAZ; LF51_FHD_B, COB43LF51 FHD Rev0.2 B-Type (15.3.13) LEDAZ
T-CON: 6870C-0532A
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): DA-65F19 Adapter 19V
MainBoard: EAX66408103 (1.0), RD5D811E67
Tuner: TDJN-G101D
Control: IR EBR80772102, LF5100, UF6400
Specifications 43LF510V
LG 43LF510V
General repair guidelines for TV LCD LED
In the absence of any signs of operability, when the LG 43LF510V does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the adapter 19V power supply module of the TV. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
Power switches in pulsed power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If the LG 43LF510V does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the HC430DUN-SLNX1-212X panel is likely. LEDs or their power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the backlight assembly.
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
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
Repair or diagnostics of the motherboard EAX66408103 (1.0), RD5D811E67 should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update the software (software).
Before replacing the TDJN-G101D tuner, if there is no tuning for 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
Remember! Attempts to self-repair by users of the LG 43LF510V TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
SCHEMATIC DIAGRAM -----------> LG CHASSIS LD55A / LD55B, MODEL 43LF5100, 43LF5100-ZA, 43LF510V 43LF510V-ZA
The appearance of the MainBoard EAX66408103 is shown in the figure below:EAX66408103
The appearance of the power supply
Main features of the device LG 43LF510V:
Installed matrix (LED-panel) HC430DUN-SLNX1-212X.
The matrix control uses the Timing Controller (T-CON) 6870C-0532A.
To power the backlight LEDs, a converter is used, combined with the main board EAX66408103.
To power all the internal components of the LG 43LF510V TV, an external source such as DA-65F19 Adapter 19V is used.
MainBoard - the main board (motherboard) is an EAX66408103 module.
The TDJN-G101D tuner provides TV reception and channel tuning.