Technical description and composition of the LG 43UJ651V TV, panel type and modules used. The composition of the modules.LG LED
Model: 43UJ651V ZA
Chassis / Version: LJ7 Chassis
Panel: HC430DGN-ABSR2-211X
LED backlight: 43UJ65_UHD_L
T-CON: 47-6021117 HV430 / 550QUB-N4D
PWM LED driver: SO-14
MOSFET LED driver: TO-252
Power Supply (PSU): EAX67267601 (1.6) REV1.0 EAY64529301
PWM Power: PFC (SO-8), PWM (17pin)
MOSFET Power: TO-252
MainBoard: EAX67166104 (1.0) EBU64553906
IC MainBoard: CPU, NAND, DRAM, AUDIO, DC / DC
Tuner: TDJN-G501D
Specifications 43UJ651V
LG 43UJ651V
General recommendations for TV LCD LED repair
Possible malfunctions
- LG 43UJ651V does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
Most likely in this case, the main switching power supply (SMPS) EAX67267601 is faulty. Then you should measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of the power switches (TO-252) and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work in an emergency in the short-circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) PFC (SO-8), PWM (17pin), in the absence of external damage and short circuit between the terminals, are checked by replacing them with a known good one.
- There is no picture, but there is sound and all other functions work. Sometimes when you turn it on, the image appears and disappears for a second.
In some of these cases, the malfunction is caused by the lack of display backlighting. Most often, the reason for this is a break in the LEDs, or poor contact in the connectors of the brackets, less often the LED driver may be faulty.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
If LG 43UJ651V has no picture, but there is sound, often the HC430DGN-ABSR2-211X display backlight simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the HC430DGN-ABSR2-211X LCD panel - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV you can see the light through the holes in the panel case.
In this case, the panel may also be faulty - damage to the strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard EAX67166104 often turns out to be faulty, a software failure is also possible.
Then, first of all, it is necessary to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard EAX67166104 with an oscilloscope, as well as synchronization signals to the loops with drivers.
Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the EAX67166104 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software).
If there is no reception of TV channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the TDJN-G501D tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
Users and owners of TVs should remember that attempts to self-repair the LG 43UJ651V TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> CHASSIS : UD74P for models 43UJ65** 43UJ65**-ZA, 43UJ6517, 43UJ651V
Additional MainBoard RepairThe appearance of the MainBoard EAX67166104 is shown in the figure below:
EAX67166104
External view of the power supply
Main features of the LG 43UJ651V device:
Installed matrix (LED panel) HC430DGN-ABSR2-211X.
Matrix control uses Timing Controller (T-CON) 47-6021117.
A converter controlled by the SO-14 PWM controller is used to power the backlight LEDs. TO-252 switches are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the LG 43UJ651V TV is carried out by the EAX67267601 power module, or its analogs using PFC (SO-8), PWM (17pin) microcircuits and TO-252 power switches.
MainBoard - the main board (motherboard) is an EAX67166104 module using CPU, NAND, DRAM, AUDIO, DC / DC chips and others.
Tuner TDJN-G501D provides reception of television programs and tuning to channels.
There are files to download for the 43UJ651V model from the manufacturer:Files with updates and instructions:
File Description File Name Type Date Size
SW File (Version 05.80.50). Update instructions TV_Software_Update_Guide_v3.pdf PDF 01/22/2020 2014K
SW File (Version 05.80.50). Firmware (USB) Software_File (Version_05.80.50) .zip ZIP 01/22/2020 831673K
for models 43UJ620V-ZA, 43UJ6307-ZA, 43UJ6309-ZA, 43UJ630V-ZA, 43UJ631V-ZA, 43UJ634V-ZD, 43UJ635V-ZF, 43UJ639V-ZE, 43UJ6517-ZA, 43UJ6519-ZA, 43UJ651V-ZA, 43UJ655V-ZC, 43UJ670V-ZD, 43UJ675V-ZC, 43UJ701V-ZC, 49UJ620V-ZA, 49UJ6307-ZA, 49UJ6309-ZA, 49UJ630V-ZA, 49UJ631V-ZA, 49UJ634V-ZD, 49UJ635V-ZF, 49UJ639V-ZE, 49UJ6517-ZA, 49UJ6519-ZA, 49UJ651V-ZA, 49UJ655V-ZC, 49UJ670V-ZD, 49UJ675V-ZC, 49UJ701V-ZC, 55UJ620V-ZA, 55UJ6307-ZA, 55UJ6309-ZA, 55UJ630V-ZA, 55UJ634V-ZD, 55UJ635V-ZF, 55UJ6517-ZA, 55UJ6519-ZA, 55UJ651V-ZA, 55UJ655V-ZC, 55UJ670V-ZD, 55UJ675V-ZC, 55UJ701V-ZC, 55UK6100PLA, 55UK6100PLB, 60UJ6307-ZA, 60UJ6309-ZA, 60UJ630V-ZA, 60UJ634V-ZD, 60UJ6517-ZA, 60UJ6519-ZA, 60UJ651V-ZA, 65UJ620V-ZA, 65UJ6307-ZA, 65UJ6309-ZA, 65UJ630V-ZA, 65UJ634V-ZD, 65UJ6517-ZA, 65UJ6519-ZA, 65UJ651V-ZA, 65UJ655V-ZC, 65UJ670V-ZD, 65UJ675V-ZC, 65UJ701V-ZC, 65UK6100PLA, 65UK6100PLB, 70UJ675V-ZA, 75UJ651V-ZB, 75UJ675V-ZA.
User Manuals and Instructions:
File type File name Language Date Size
User manual UJ651_ (ENG) .pdf English 09/21/2017 17685K
Quick Start Guide w3.5_mr_e05_c.zip English, Estonian, Latvian, Lettish, Lithuanian, Russian 10/31/2019
Quick setup instruction Web_OS_3.5_Smart_QSG_RUS.pdf Russian 28.12.2017 4888K
Files can be downloaded from the manufacturer's website for the 43UJ651V model.
LG 43UJ651V TV with LCD HC430DGN-ABSR2-211X, 42.5 "(108 cm) 16: 9 format diagonal. The LCD panel implements the principle of direct backlight display with rear LEDs - Direct LED.
The HC430DGN-ABSR2-211X sensor and MainBoard EAX67166104 software are capable of realizing images in the highest UHD quality at a resolution of 3840x2160 pixels in 4K UHD, HDR. Image processing is performed using modern High Dynamic Range (HDR) technology with an extended range of brightness gradations.
TV model 43UJ651V has built-in SMART software and webOS operating system installed. The connection to the network can be carried out via Wi-Fi wireless connection. Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), DivX, MKV, JPEG.
Speaker sound system power 20 W (2x10 W) is provided by two speakers. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x4, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi 802.11ac, WiDi, Miracast. A headphone jack is provided.
The digital tuner can receive TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The TV uses an EAX67267601 power supply.
Dimensions: With stand 974x681x219 mm, Without stand 974x625x79 mm.
Attention! The HC430DGN-ABSR2-211X panel of the LG 43UJ651V LED TV is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.