REPAIR / SERVICING TV LG 43UF680V

Technical description and composition of the LG 43UF680V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43UF680V
Chassis / Version: LC59L
Panel: LC430EGE
LED driver (backlight): integrated into PSU
Power Supply (PSU): EAX66453801 (1.7)
MainBoard: EAX66564303 (1.0)
IC MainBoard: CPU: LGE5332 (LM14A), SPI Flash: 25Q32, EEPROM: 24C256, DRAM: K4B4G1646D-BCMA
Tuner: TDJM-G301D p / n: EBL61560001
Specifications 43UF680V
LG 43UF680V
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The LG 43UF680V TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
Most likely in this case, the main switching power supply (IIPS) EAX66453801 is faulty. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches and rectifier diodes of the converters for the probability of a short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- 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.
As a rule, in such cases there is no display backlight. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the EAX66564303 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 - CPU: LGE5332 (LM14A), SPI Flash: 25Q32, EEPROM: 24C256, DRAM: K4B4G1646D-BCMA and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If a tuner TDJM-G301D p / n is suspected to be malfunctioning: EBL61560001, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary power supply voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.

 If the LG 43UF680V has no picture, but there is sound, the LC430EGG-FHM1 display backlight often 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 LC430EGG-FHM1 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 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 EAX66564303 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, 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 EAX66564303 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.

Owners and users of the LG 43UF680V TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>     LG 43UF6800 Chassis LC59L    for models  43UF680* 43UF680*-ZA, 43UF6807, 43UF680V, 43UF6857

 Main features of the device LG 43UF680V:
Installed matrix (LED-panel) LC430EGE.
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 43UF680V TV is carried out by the EAX66453801 power supply module, or its analogs.
MainBoard - the main board (motherboard) is an EAX66564303 module using CPU chips: LGE5332 (LM14A), SPI Flash: 25Q32, EEPROM: 24C256, DRAM: K4B4G1646D-BCMA and others.
Tuner TDJM-G301D p / n: EBL61560001 provides the reception of television programs and tuned to channels.


 LG 43UF680V LCD TV with LC430EGG-FHM1 LCD, 43 "(109 cm) 16: 9 format diagonal. This model uses a panel with edge LED backlighting - Edge LED.
The LC430EGG-FHM1 sensor and MainBoard EAX66564303 software are capable of realizing the highest UHD image quality at 3840x2160 4K UHD resolution.
The 43UF680V TV model has built-in SMART software and webOS operating system installed. The connection to the network can be carried out via Wi-Fi wireless connection. The input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphic processing of a digital signal is carried out in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p. Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), MKV, JPEG.
Speaker 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 x2, USB, Ethernet (RJ-45), Bluetooth, Wi-Fi, WiDi, Miracast. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is provided. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080, 3840x2160.
The digital tuner can receive TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The TV uses an EAX66453801 power supply.
Dimensions: With stand 971x628x180 mm, Without stand 971x570x56 mm.
Attention! Panel LC430EGG-FHM1 LED-TV LG 43UF680V 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.

REPAIR / SERVICING TV LG 43UF670V

Technical description and composition of the LG 43UF670V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43UF670V
Chassis / Version: 542L001F 4K UHD
Panel: LC430EQE (FH) (M2)
T-CON: V15 43UHD TM120 LGE Ver0.2 P / N: 6870C-0571B; TE12453MC, SW5O94A, RT5043A, 432FK
LED driver (backlight): integrated into PSU; 50V 1A
PWM LED driver: MC93F5616LB
MOSFET LED driver: 19NF20
Power Supply (PSU): EAX66205401 (1.8) - EAY63748601
PWM Power: UC2843B, NR134S
MainBoard: EAX66267106 (1,5) EBT63757303
IC MainBoard: LGE2134, MN864788, H27U1G8F2CTR, W25Q32FV, MX25L8035E, 24G256 (4G25), NTP7515
Tuner: TDJM-G301D EBL61560001
Specifications 43UF670V
LG 43UF670V
General repair guidelines for TV LCD LED
If the 43UF670V TV does not turn on, does not make any sounds when turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, there may be a malfunction only in standby power. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the rectifier bridge of the mains voltage and the power key (s) of the converter. The complete inoperability of the power supply unit can be caused by a short circuit in the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the binding of the PWM regulator chip UC2843B, NR134S, which it is desirable to check by replacement, are subject to verification.
If there is no image when you turn on the LG 43UF670V, or it appears and immediately disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the LC430EQE (FH) (M2) panel, or in the LED node of the driver-converter of their power supply.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
Diagnosis and repair of the EAX66267106 (1,5) EBT63757303 motherboard usually begins with a test of the performance of the stabilizers and power converters of the module chips. In some cases, a software update is required.
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements LGE2134, MN864788, H27U1G8F2CTR, W25Q32FV, MX25L8035E, 24G256 (4G25), NTP7515 requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
Malfunction of the TDJM-G301D EBL61560001 tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.

Attention to users! Self-repair of the LG 43UF670V TV without the appropriate qualifications and experience can lead to its complete non-repairability!

Firmware W25Q32FV, MX25L8035E, 24G256 (4G25) ------------------->  LG 43UF670V, Main: EAX66267106 (1,5) EBT63757303, Panel: LC430EQE (FH)(M2)

 The appearance of the MainBoard EAX66267106 is shown in the figure below:
EAX66267106
The appearance of the power supply
Main features of the device LG 43UF670V:
Installed matrix (LED-panel) LC430EQE (FH) (M2).
The matrix control uses the Timing Controller (T-CON) V15.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the MC93F5616LB PWM controller. As power elements of the LED driver, keys of the 19NF20 type are used.
The necessary supply voltages for all nodes of the LG 43UF670V TV are generated by the EAX66205401 power supply module or its analogs using UC2843B, NR134S microcircuits.
MainBoard - the main board (motherboard) is an EAX66267106 module, using LGE2134, MN864788, H27U1G8F2CTR, W25Q32FV, MX25L8035E, 24G256 (4G25), NTP7515 and others microcircuits.
The TDJM-G301D EBL61560001 tuner provides TV reception and channel tuning.

REPAIR / SERVICING TV LG 43LJ610V

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.

REPAIR / SERVICING TV LG 43LJ595V

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.

REPAIR / SERVICING TV LG 43LJ594V

Technical description and composition of the LG 43LJ594V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43LJ594V
Chassis / Version: UD63P EAX66804605
Panel: HC430DUN-SLTL1-911X
LED backlight: 43INCH UHD_LED ARRAY_A / B-TYPE_161024
LED driver (backlight): integrated into PSU
MOSFET LED driver: TO-252
Power Supply (PSU): EAX67264001 (1.5) EAY64530001 LGP43DJ-17F1
PWM Power: PFC, PWM
MOSFET Power: TO-252
MainBoard: EAX66804605 (1.1) EBT64202213
Tuner: TDJN-G301D
Specifications 43LJ594V
LG 43LJ594V
General repair guidelines for TV LCD LED
Possible manifestations of defects
- LG 43LJ594V does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
In such cases, the fault should be sought first in the EAX67264001 power supply module. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of power switches (TO-252) of converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM) PFC, PWM, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- 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
The faulty usually in these cases is the backlight matrix (LED-panel). The reason may be a break in the LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the strings,
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the EAX66804605 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).
The TDJN-G301D tuner malfunction is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.

It should be remembered! Attempts to independently repair the LG 43LJ594V TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

The appearance of the MainBoard EAX66804605 is shown in the figure below:
EAX66804605
The appearance of the power supply
Main features of the device LG 43LJ594V:
Installed matrix (LED panel) HC430DUN-SLTL1-911X.
To power the backlight LEDs, a converter is used, combined with a power supply. As power elements of the LED driver, keys of the TO-252 type are used.
The necessary supply voltages are generated for all nodes of the LG 43LJ594V TV by the EAX67264001 power module or its analogs using PFC, PWM microcircuits, and TO-252 type power switches.
MainBoard - the main board (motherboard) is an EAX66804605 module.
The TDJN-G301D tuner provides TV reception and channel tuning.

REPAIR / SERVICING TV LG 43LJ519V

Technical description and composition of the LG 43LJ519V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43LJ519V
Chassis / Version: LD76H
Panel: HC430DUN-ABVX2-2144
LED backlight: 43LH51_FHD_A, 43LH51_FHD_B
T-CON: HV430FHB-N1D 47-6021141
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP3378E
MOSFET LED driver: AOD2922
Power Supply (PSU): Adapter 19V 3.42A
MainBoard: EAX67041506 (1.2)
IC MainBoard: LGE6351, H27U1G8F
Tuner: TDJA-G501D
Specifications 43LJ519V
LG 43LJ519V
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 43LJ519V does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In such cases, the adapter power supply is usually faulty.
The external adapter 19V 3.42A power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is necessary to measure its output supply voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often 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 reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
Often in such cases, there is no LED backlight. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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
- 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 EAX67041506 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements LGE6351, H27U1G8F. BGA chip malfunctions are usually easy to detect by warming up.
The TDJA-G501D tuner malfunction is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.

Attention TV owners! Self-repair attempts by LG 43LJ519V are not recommended by the manufacturer and can lead to serious negative consequences!

To reduce the backlight current in LED drivers with the MP3378E PWM controller, it is necessary to proportionally increase the total resistance of the resistors from pin 3 (RISET) to the chassis. Calculation of current in milliamperes and resistance in kilo-ohms 977 / Rset for each channel. Parallel channels are summed. For example, for four parallel channels and a RISET 10 KOhm resistance, the total current will be 97.7 * 4 = 391 mA.



The appearance of the MainBoard EAX67041506 is shown in the figure below:
EAX67041506
Main features of the device LG 43LJ519V:
Installed matrix (LED-panel) HC430DUN-ABVX2-2144.
The matrix control uses the Timing Controller (T-CON) HV430FHB-N1D.
To power the backlight LEDs, a converter is used, combined with the EAX67041506 main board, controlled by the MP3378E PWM controller. As power elements of the LED driver, keys of the AOD2922 type are used.
To power all the internal components of the LG 43LJ519V TV, an external adapter type 19V 3.42A is used.
MainBoard - the main board (motherboard) is an EAX67041506 module, using LGE6351, H27U1G8F chipsets and others.
The TDJA-G501D tuner provides television reception and channel tuning.

REPAIR / SERVICING TV LG 43LJ515V

Technical description and composition of the LG 43LJ515V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43LJ515V
Chassis / Version: LD76H
Panel: LC430DUE-FJA1
LED backlight: 6916L-2743B 43 V16.5 ART3 2743 Rev0.02
T-CON: 6870C-0532C
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): Adapter 19V
MainBoard: EAX67041505 (1.0)
IC MainBoard: CPU: LGE6351, Audio: NTP7515D, NAND FLASH: H27U1G8F2CTR
Tuner: TDJA-G501D
Control: IR: EBR83592901 LJ51_Ver1.0
Specifications 43LJ515V
LG 43LJ515V
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 43LJ515V TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
With such manifestations, the Adapter power module usually fails.
This TV model is equipped with an external power adapter type Adapter 19V, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes there is a certain sense to open it and eliminate simple typical defects typical of IPS. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good 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 some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. 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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the EAX67041505 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 some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU: LGE6351, Audio: NTP7515D, NAND FLASH: H27U1G8F2CTR with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
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 EAX67041505 is shown in the figure below:
EAX67041505
Main features of the device LG 43LJ515V:
Installed matrix (LED-panel) LC430DUE-FJA1.
The matrix control uses the Timing Controller (T-CON) 6870C-0532C.
To power the backlight LEDs, a converter is used, combined with the main board EAX67041505.
To power all the internal components of the LG 43LJ515V TV, an external adapter 19V type source is used.
MainBoard - the main board (motherboard) is an EAX67041505 module, using CPU chips: LGE6351, Audio: NTP7515D, NAND FLASH: H27U1G8F2CTR and others.
The TDJA-G501D tuner provides television reception and channel tuning.

REPAIR / SERVICING TV LG 43LJ510V

Technical description and composition of the LG 43LJ510V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43LJ510V
Chassis / Version: LD76H
Panel: LC430DUE (FJ) (A1)
LED backlight: 6916L-2743B 43 V16.5 ART3 2743 Rev0.02
T-CON: 6870C-0532B
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP3378E
MOSFET LED driver: AOD2922
Power Supply (PSU): Adapter 19V 3.42A
MainBoard: EAX67041506 (1.2) RS7DL31F1C
IC MainBoard: LGE6351, H27U1G8F
Tuner: TDJA-G501D
Control: IR: EBR83592901 UJ51_Ver1.0
Specifications 43LJ510V
LG 43LJ510V
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 43LJ510V does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
In such cases, the adapter power supply is usually faulty.
The external adapter 19V 3.42A power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. 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 the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM), if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- 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
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- 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 EAX67041506 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 - LGE6351, H27U1G8F 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 changing the tuner TDJA-G501D, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages that must be measured at 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 to users! Self-repair of the LG 43LJ510V TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!

To reduce the backlight current in LED drivers with the MP3378E PWM controller, it is necessary to proportionally increase the total resistance of the resistors from pin 3 (RISET) to the chassis. Calculation of current in milliamperes and resistance in kilo-ohms 977 / Rset for each channel. Parallel channels are summed. For example, for four parallel channels and a RISET 10 KOhm resistance, the total current will be 97.7 * 4 = 391 mA.

FIRMWARE SPI FLASH, NAND FLASH ----->  LG LD76H Main: EAX67041506 (1.2)

 The appearance of the MainBoard EAX67041506 is shown in the figure below:
EAX67041506
Main features of the device LG 43LJ510V:
Installed matrix (LED-panel) LC430DUE (FJ) (A1).
The matrix control uses the Timing Controller (T-CON) 6870C-0532B.
To power the backlight LEDs, a converter is used, combined with the EAX67041506 main board, controlled by the MP3378E PWM controller. As power elements of the LED driver, keys of the AOD2922 type are used.
To power all the internal components of the LG 43LJ510V TV, an external adapter type 19V 3.42A is used.
MainBoard - the main board (motherboard) is an EAX67041506 module, using LGE6351, H27U1G8F chipsets and others.
The TDJA-G501D tuner provides television reception and channel tuning.

REPAIR / SERVICING TV LG 43LJ500V

Technical description and composition of the LG 43LJ500V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43LJ500V ZB
Panel: TPT430H3-DUYSHA.G
LED backlight: GJ-2K16-430-D510-V4
T-CON: 6870C-0532A
LED driver (backlight): integrated into PSU
PWM LED driver: PF7909S
MOSFET LED driver: AOTF4126
Power Supply (PSU): 715G7574-P01-W07-0H2H
PWM Power: LD7591T, SSC3S121A
MOSFET Power: TK12A60W, AOTF12N65
MainBoard: 715G8524-M0F-B00-004T EBT64601901
IC MainBoard: NAND: W29N01GVSIAA
Tuner: TDQS-A751F (L) & TDSY-G430D
Control: IR: 715G8638-R01-000-004T
Specifications 43LJ500V
LG 43LJ500V
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 43LJ500V TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
In some of these cases, a malfunction is detected in the 715G7574-P01-W07-0H2H power supply module. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of the power switches (TK12A60W, AOTF12N65) and rectifier diodes for possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) LD7591T, SSC3S121A, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. 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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 715G8524-M0F-B00-004T 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). When repairing an MB board, you must check its NAND components: W29N01GVSIAA. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the TDQS-A751F (L) & TDSY-G430D 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.

It should be remembered! Attempts to independently repair the LG 43LJ500V TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

The appearance of the MainBoard 715G8524-M0F-B00-004T is shown in the figure below:
715G8524-M0F-B00-004T
Main features of the device LG 43LJ500V:
Installed matrix (LED panel) TPT430H3-DUYSHA.G.
The matrix control uses the Timing Controller (T-CON) 6870C-0532A.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the PF7909S PWM controller. As power elements of the LED driver, keys of the AOTF4126 type are used.
The necessary supply voltages for all nodes of the LG 43LJ500V TV are generated by the power module 715G7574-P01-W07-0H2H, or its analogs using microcircuits LD7591T, SSC3S121A and power switches of the type TK12A60W, AOTF12N65.
MainBoard - the main board (motherboard) is a module 715G8524-M0F-B00-004T, using NAND chips: W29N01GVSIAA and others.
The TDQS-A751F (L) & TDSY-G430D tuner provides TV reception and channel tuning.

REPAIR / SERVICING TV LG 43LH615V

Technical description and composition of the LG 43LH615V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43LH615V ZE
Chassis / Version: LD66H
Panel: LC430DUE (FJ) (M4)
LED driver (backlight): integrated into PSU
Power Supply (PSU): EAX66793101 (1.6) EAY64229501 LGP43DI-16CH1
MainBoard: EAX66769505 (1.0)
Tuner: TDJA-G301D
Control: AKB74915324
Specifications 43LH615V
LG 43LH615V
General repair guidelines for TV LCD LED
In the case when the 43LH615V does not turn on, does not respond to the remote control and buttons on the front panel, does not blink lights and does not show any signs of operability, the EAX66793101 (1.6) EAY64229501 LGP43DI-16CH1 power supply module is probably defective. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should begin by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or broken resistors in its bundle.
If the LG 43LH615V TV does not have an image, but there is sound, a malfunction in the backlight circuits of the LED panel LC430DUE (FJ) (M4) is likely.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the health of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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
The motherboard EAX66769505 (1.0) must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the TDJA-G301D tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.

Remember! Attempts to self-repair by users of the LG 43LH615V TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!

SCHEMATIC DIAGRAM --------------->  LG 43LH615V Chassis LD66H

CHASSIS : LD66H; MODEL : 43LH60**, 43LH60**-ZA/ZB/ZF, 43LH615V, 43LH615V-ZE

 The appearance of the MainBoard EAX66769505 is shown in the figure below:
EAX66769505
The appearance of the power supply
Main features of the device LG 43LH615V:
Installed matrix (LED-panel) LC430DUE (FJ) (M4).
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 43LH615V TV is carried out by the EAX66793101 power module, or its analogues.
MainBoard - the main board (motherboard) is an EAX66769505 module.
The TDJA-G301D tuner provides TV reception and channel tuning.

REPAIR / SERVICING TV LG 43LH590V

Technical description and composition of the LG 43LH590V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43LH590V
Chassis / Version: LD66L
Panel: HC430DUN-SLVX1-511X
LED backlight: LG lnnotek 15.5Y 43inch_FHD LED_ARRAY_Rev0.0_151013 = 43LH51_FHD_A
T-CON: 6870C-0532A
LED driver (backlight): integrated into PSU
Power Supply (PSU): EAX66851301 (1.5) EAY64310501 G690RGLN REV-02 LGP43DS1-16CH1
MainBoard: EAX66873003 (1.0) RS71L51ENJ
Tuner: TDJA-G301D
Control: Remote: AKB74915330, IR: EBR80772102 LF5100 UF640, Wi-Fi: EAT61813903 TWFM-B006D BEJTWFMB006D
Specifications 43LH590V
LG 43LH590V
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 43LH590V TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In some of these cases, the main switching power supply, the EAX66851301 module, is faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
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.
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 EAX66873003 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 the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the TDJA-G301D tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.

It should be remembered! Attempts to independently repair the LG 43LH590V TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

The appearance of the MainBoard EAX66873003 is shown in the figure below:
EAX66873003
EAX66873003 can be used in TVs:
LG 43LH570V (Panel HC430DUN-SLVX1-511X), LG 43LH590V (Panel HC430DUN-SLVX1-511X).
The appearance of the power supply
Main features of the device LG 43LH590V:
Installed matrix (LED panel) HC430DUN-SLVX1-511X.
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 43LH590V TV is carried out by the EAX66851301 power module, or its analogues.
MainBoard - the main board (motherboard) is an EAX66873003 module.
The TDJA-G301D tuner provides TV reception and channel tuning.

REPAIR / SERVICING TV LG 43LH570V

Technical description and composition of the LG 43LH570V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43LH570V
Chassis / Version: LD66L / Z LA66L
Panel: HC430DUN-SLVX1-511X
LED backlight: 43LH51 FHD A Type L / R
T-CON: 6870C-0532A
LED driver (backlight): integrated into PSU
Power Supply (PSU): EAX66851301 (1.5) EAY64310501 LGP43DS1-16CH1
MainBoard: EAX66873003 (1.0)
Tuner: TDJA-G301D
Control: Wi-Fi: TWFM-B006D
Specifications 43LH570V
LG 43LH570V
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 43LH570V TV does not turn on, the indicators on the front panel do not light or flash. The remote control does not respond to the control buttons.
Often in such cases, the EAX66851301 power module is faulty. It is necessary to measure the secondary output voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power key may be PWM IC_Power. It is checked only by replacement with a known good one.
- There is no image, there is sound, it responds to the remote. Or the image may appear for a second when turned on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the EAX66873003 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).
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.

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.

SCHEMATIC DIAGRAM --------------->  LG 43LH570V Chassis LA66L/Z

CHASSIS : LA66L; MODEL : 43LH570*, 43LH570*-U*, 49LH570*, 49LH570*-U*

The appearance of the MainBoard EAX66873003 is shown in the figure below:
EAX66873003
EAX66873003 can be used in TVs:
LG 43LH570V (Panel HC430DUN-SLVX1-511X), LG 43LH590V (Panel HC430DUN-SLVX1-511X).
The appearance of the power supply
Main features of the device LG 43LH570V:
Installed matrix (LED panel) HC430DUN-SLVX1-511X.
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 43LH570V TV is carried out by the EAX66851301 power module, or its analogues.
MainBoard - the main board (motherboard) is an EAX66873003 module.
The TDJA-G301D tuner provides TV reception and channel tuning.

REPAIR / SERVICING TV LG 43LH541V

Technical description and composition of the LG 43LH541V TV, type of panel and applicable modules. The composition of the modules.
LG LED
Model: 43LH541V 43LH541V-ZD
Chassis / Version: LD68T-LB67T
Panel: HC430EUN-SLES8-213X (5112)
LED backlight: MAK63207801
T-CON: 6870C-0532A
LED driver (backlight): integrated into PSU; 117V, 250mA
Power Supply (PSU): EAX66822701 (1.5) EAY64308601 LGP43BI-16CH1
MainBoard: EAX66748005 (1.0)
IC MainBoard: LGE6351, 24C256 (4G25), MX25L8035E, NAND: H27U1G8F2CTR
Tuner: TDJA-G301D
Control: Remote: AKB74475490
Specifications 43LH541V
LG 43LH541V
General repair guidelines for TV LCD LED
Possible malfunctions
- LG 43LH541V does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
With such manifestations, a malfunction is most likely to be detected in the EAX66822701 power supply module. 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 any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the EAX66748005 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements LGE6351, 24C256 (4G25), MX25L8035E, NAND: H27U1G8F2CTR requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If the TV works normally from external devices, but does not tune into television channels, the TDJA-G301D 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.

 If LG 43LH541V has no picture, but there is sound, often the display backlight HC430EUN-SLES8-213X (5112) 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 HC430EUN-SLES8-213X 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 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 often the main board MainBoard EAX66748005 turns out to be faulty, a software failure is also possible.
Then, first of all, it is necessary to check the panel supply voltage, 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 EAX66748005 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.

Attention to users! Self-repair of the LG 43LH541V TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!

The appearance of the MainBoard EAX66748005 is shown in the figure below:
EAX66748005
The appearance of the power supply
Main features of the device LG 43LH541V:
Installed matrix (LED panel) HC430EUN-SLES8-213X (5112).
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 43LH541V TV is carried out by the EAX66822701 power module, or its analogues.
MainBoard - the main board (motherboard) is an EAX66748005 module, using chips LGE6351, 24C256 (4G25), MX25L8035E, NAND: H27U1G8F2CTR and others.
The TDJA-G301D tuner provides TV reception and channel tuning.


 LG 43LH541V TV with HC430EUN-SLES8 LCD, 43 "(109 cm) 16: 9 format diagonal. This model uses a panel with edge LED backlighting - Edge LED.
The HC430EUN-SLES8 sensor and MainBoard EAX66748005 software provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD). The input analog video signal is decoded in PAL, SECAM, NTSC systems. The graphic processing of the digital signal is carried out in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
Speaker power 10 W (2x5 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), component, HDMI x2, USB. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is provided. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
The digital tuner can receive TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The TV uses an EAX66822701 power supply.
Dimensions: With stand 1106x701x325 mm, Without stand 1106x647x37 mm.
Attention! Panel HC430EUN-SLES8 LED TV LG 43LH541V 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.

REPAIR / SERVICING TV LG 43LH520V

Technical description and composition of the LG 43LH520V TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 43LH520V
Chassis / Version: LD67C
Panel: LC430DUE (FJ) (A1)
LED backlight: 6916L-2743A V16.5 ART3 2743
T-CON: 6870C-0532C
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP3378E
MOSFET LED driver: AOD2922
Power Supply (PSU): DA-65F19 Adapter 19V 3.42A
MainBoard: EAX66805906 (1.0)
IC MainBoard: LGE6351, H27U1G8F, MX25L8035E, LCX244, MP2315 (TSOT23-8 Marking: AGCG), DT1803A, SN1406035, NTP7515D
Tuner: TDJA-G301D
Control: LF5100-UF6400_VER.1.0
Specifications 43LH520V
LG 43LH520V
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 43LH520V TV does not turn on and does not show any signs of operability; it does not respond to the control buttons or to the remote control. The indicators do not light or flash.
In some of these cases, a malfunction is detected in the power module (adapter) of the DA-65F19.
An external power adapter such as an adabter - DA-65F19 is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to eliminate the simple typical defects inherent in all converters of pulsed sources. It is necessary to measure its output voltage of 19V and, in case of its absence, it is necessary to check the serviceability of power switches and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or a low-resistance current sensor at the source of the key often breaks.
The breakdown of power switches (MosFet) in pulsed sources is most often caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWMs), if they do not have visible damage to the case and frank short-circuit between the terminals, are usually checked by replacing with a known-good one.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
The most likely in these cases is a malfunction of the LED backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200-300V. 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. For dual 6-volt LEDs, the health of the PN junction of the protective zener diode may indirectly indicate the health of the LED.
- 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 EAX66805906 motherboard should begin by checking the stabilizers and converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. BGA chip malfunctions are usually detected by local warming.
If the TV does not catch or tune to channels, the TDJA-G301D tuner malfunction is established after checking the software and all the necessary supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope. Sometimes the tuner is restored after replacing the software.

Attention to users! Self-repair of the LG 43LH520V TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!

FIRMWARE SPI FLASH LG 43LH520V LD67C, Main: EAX66805906, Panel: LC430DUE (FJ)(A1)

 To reduce the backlight current in LED drivers with the MP3378E PWM controller, it is necessary to proportionally increase the total resistance of the resistors from pin 3 (RISET) to the chassis. Calculation of current in milliamperes and resistance in kilo-ohms 977 / Rset for each channel. Parallel channels are summed. For example, for four parallel channels and a RISET 10 KOhm resistance, the total current will be 97.7 * 4 = 391 mA.

 The appearance of the MainBoard EAX66805906 is shown in the figure below:
EAX66805906
EAX66805906 can be used in TVs:
LG 32LH510U (Panel HC320DXN-VSVS1 - 511X), LG 43LH513V (Panel HC430DUN-SLVX1 - 511X), LG 32LH520U (Panel HC320DXN-ABVS2-5112), LG 43LH520V (Panel LC430DUE (FJ)(A1)), LG 32LH513U LG 32LH513U-ZE (Panel HC320DXN-VHVS1-214X), LG 49LH520V (Panel LC490DUE (FJ)(A1)).
The appearance of the power supply
Main features of the device LG 43LH520V:
Installed matrix (LED-panel) LC430DUE (FJ) (A1).
The matrix control uses the Timing Controller (T-CON) 6870C-0532C.
To power the backlight LEDs, a converter is used, combined with the EAX66805906 main board, controlled by the MP3378E PWM controller. As power elements of the LED driver, keys of the AOD2922 type are used.
To power all the internal components of the LG 43LH520V TV, an external source such as DA-65F19 Adapter 19V 3.42A is used.
MainBoard - the main board (motherboard) is an EAX66805906 module using LGE6351, H27U1G8F, MX25L8035E, LCX244, MP2315 (TSOT23-8 Marking: AGCG), DT1803A, SN1406035, NTP7515D and others microcircuits.
The TDJA-G301D tuner provides TV reception and channel tuning.