Technical description and composition of the LG 43LJ595V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 43LJ595V
Chassis / Version: LD75M / LD75H
Panel: HC430DUN-SLTL3-211X
LED backlight: LC43490058A lnnotek 17Y 43inch
T-CON: 6870C-0532A 6871L-3806D
LED driver (backlight): integrated into PSU
Power Supply (PSU): EAX67264001 (1.5) EAY64530001 PLDF-L602A
MainBoard: EAX67129603 (1.0)
IC MainBoard: SEC 725 8031 KLW4G1FEPD, FT24C256A, K4B4G164GE x2, R5F100GEAFB, DTA2010M
Tuner: TDJA-G501D EBL61840901
Control: IR: EBR83592701 UJ65_V1.0, Wi-Fi: LGSWFAC7
Specifications 43LJ595V
LG 43LJ595V
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 43LJ595V TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Most often, with such manifestations, the main power supply module EAX67264001 is found to be faulty. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually 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 microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, but there is sound and all other functions work. Sometimes when you turn on the image for a second appears and disappears.
The faulty usually in these cases is the backlight matrix (LED-panel). More often the reason for this is the breakdown of the LEDs, or poor contact in the connectors of the strips, less often the LED driver may be faulty.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the EAX67129603 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 cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - SEC 725 8031 KLW4G1FEPD, FT24C256A, K4B4G164GE x2, R5F100GEAFB, DTA2010M which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If the TV works normally from external devices, but does not tune into television channels, the TDJA-G501D EBL61840901 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.
Once again, remind users! Attempts to self-repair the LG 43LJ595V TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard EAX67129603 is shown in the figure below:EAX67129603
The appearance of the power supply
Main features of the device LG 43LJ595V:
The matrix (LED panel) HC430DUN-SLTL3-211X is installed.
The matrix control uses the Timing Controller (T-CON) 6870C-0532A.
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 43LJ595V TV is carried out by the EAX67264001 power module, or its analogues.
MainBoard - the main board (motherboard) is an EAX67129603 module, using SEC 725 8031 KLW4G1FEPD, FT24C256A, K4B4G164GE x2, R5F100GEAFB, DTA2010M and others.
The TDJA-G501D EBL61840901 tuner provides TV reception and channel tuning.