Technical description and composition of the LG 43UH619V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 43UH619V
Chassis / Version: UD65S
Panel: HC430DGN-SLNXG-211X
LED backlight: UF64_UHD_A L 43INCH UHD 1BAR 24EA TUPE REV.0.4_150408
T-CON: 6870C-0647A 43/49 / 55UHD TM120 V0.1
LED driver (backlight): integrated into PSU; 77V 600mA
Power Supply (PSU): EAX66883501 (1.5) REV2.0 EAY64388801
MainBoard: EAX66943504 (1.0) EBL61741501
IC MainBoard: CPU: LGE6551-DA, EMMC: THGBMBG5D1KBAIL, EEPROM: 24C256
Tuner: TDJM-G301D EBL61741501
Control: Wi-Fi: TWFM-B006D
Specifications 43UH619V
LG 43UH619V
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 43UH619V TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
Most often, with such manifestations, the main power supply module EAX66883501 is found to be faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible 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 most often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. IC_Power PWM controllers, in the absence of visible damage or open faults between the terminals, are checked by replacing them with new ones, or obviously working ones.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
In such cases, the most likely malfunction of the LED backlight elements. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
Without a special current source, it is impossible to check the line of series-connected LEDs, and for this purpose it is not safe to use any voltage sources above 12V. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the EAX66943504 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).
Before changing the tuner TDJM-G301D EBL61741501, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured on the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention TV owners! Self-repair attempts by LG 43UH619V are not recommended by the manufacturer and can lead to serious negative consequences!
schematic diagram -----------> LG 43UH619V Chassis UD65S.
CHASSIS : UD65S; MODEL : 43UH61**, 49UH61**, 43UH61**-ZB/ZC, 49UH61**-ZB/ZC, 43UH620*, 49UH620*, 43UH620*-ZA, 49UH620*-ZA
The appearance of the MainBoard EAX66943504 is shown in the figure below:
EAX66943504
EAX66943504 can be used in TVs:
LG 43UH619V (Panel HC430DGN-SLNXG-211X), LG 49UH603V (Panel LC490DGE (FJ)(M2)), LG 43UH603V (Panel LC430DGE (FJ)(M2)), LG 43UH610V (Panel HC430DGN-SLNX5-5112).
The appearance of the power supply
Main features of the device LG 43UH619V:
Installed matrix (LED panel) HC430DGN-SLNXG-211X.
The matrix control uses the Timing Controller (T-CON) 6870C-0647A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the LG 43UH619V TV is carried out by the EAX66883501 power supply module, or its analogs.
MainBoard - the main board (motherboard) is an EAX66943504 module using CPU chips: LGE6551-DA, EMMC: THGBMBG5D1KBAIL, EEPROM: 24C256 and others.
Tuner TDJM-G301D EBL61741501 provides the reception of television programs and tuning to channels.