Technical description and composition of the LG 43LJ610V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 43LJ610V
Chassis / Version: LD75M (LD75H)
Panel: LC430DUE (FK) (M3)
LED backlight: 43 V17 ART3 2867 REV0.3
T-CON: 6870C-0532D
LED driver (backlight): integrated into PSU
Power Supply (PSU): EAX67147201 (1.4) REV1.0 LGP43D-17F1
MainBoard: EAX67129604 (1.0)
IC MainBoard: EEPROM: IC100 - 24C256
Tuner: TDJA-G501D
Control: LGSWFA071, EBR8359230
Specifications 43LJ610V
LG 43LJ610V
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 43LJ610V TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light up and do not blink.
Usually with such manifestations, the defect is caused by faulty elements in the main power supply module EAX67147201. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
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.
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. PWM controllers, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the EAX67129604 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - EEPROM: IC100 - 24C256 and replace failed chips with new ones. Some malfunctions can be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
Before replacing the TDJA-G501D tuner, if there is no tuning to 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
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.
The appearance of the MainBoard EAX67129604 is shown in the figure below:EAX67129604
The appearance of the power supply
Main features of the device LG 43LJ610V:
Installed matrix (LED-panel) LC430DUE (FK) (M3).
The matrix control uses the Timing Controller (T-CON) 6870C-0532D.
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 43LJ610V TV is carried out by the EAX67147201 power module, or its analogues.
MainBoard - the main board (motherboard) is an EAX67129604 module, using EEPROM chips: IC100 - 24C256 and others.
The TDJA-G501D tuner provides television reception and channel tuning.