Technical description and composition of the LG 43UK6300 TV, panel type and modules used. The composition of the modules.LG LED
Model: 43UK6300
Panel: HC430DGG-SLTL5-9111 / AC430DGG SLJM1_RA
LED driver (backlight): integrated into PSU
PWM LED driver: 8 pin
MOSFET LED driver: TO-252
Power Supply (PSU): EAX67209001 EAY64529501 LGP43DJ-17U1
PWM Power: PFC, PWM
MOSFET Power: N-FET TO-220F, TO-252
MainBoard: EAX67872805 (1.1)
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: TDJA-G601D
Specifications 43UK6300
LG 43UK6300
General recommendations for TV LCD LED repair
Possible manifestations of defects
- The LG 43UK6300 TV does not turn on, does not respond to the remote control and control panel buttons, the indicators do not light up or flash.
Most likely, in this case, the main switching power supply (SMPS) EAX67209001 is faulty. Then we recommend measuring its output voltages and, if they are absent, you should check the serviceability of the power switches (N-FET TO-220F, TO-252) and the 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 in the event of 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, PWM, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with known good ones.
- There is no picture, but there is sound and reaction to the remote control. Or, for a second, the image may appear immediately after switching on.
Often in such cases, there is no backlighting of the LED panel. 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.
Without a special current source, it is impossible to check the line of series-connected LEDs, and it is unsafe for them to use any voltage sources over 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Typically, Chinese multimeters with a 9V power supply lightly light up one 3-volt LED if you connect the probes to it in the forward direction, the red probe to the anode, and the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or pierced in the K / Z.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the EAX67872805 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). Complicated MB (SSB) repair is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements of CPU, eMMC, DRAM, AUDIO, DC / DC requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the warm-up method.
Before replacing the TDJA-G601D tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its outputs. You also need to make sure that the tuner and processor can exchange data via the I2C bus.
Attention to users! Self-repair of the LG 43UK6300 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> CHASSIS : UA83P FOR MODEL 43UK6300PUE
Additional MainBoard RepairThe MainBoard EAX67872805 is shown in the figure below:
EAX67872805
External view of the power supply
The main features of the LG 43UK6300 device:
Installed matrix (LED panel) HC430DGG-SLTL5-9111 / AC430DGG SLJM1_RA.
A converter combined with a power supply is used to power the backlight LEDs, it is controlled by an 8 pin PWM controller. 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 43UK6300 TV is carried out by the EAX67209001 power module, or its analogues using PFC, PWM microcircuits and power switches of the N-FET TO-220F, TO-252 type.
MainBoard - the main board (motherboard) is an EAX67872805 module using CPU, eMMC, DRAM, AUDIO, DC / DC chips and others.
Tuner TDJA-G601D provides reception of television programs and tuning to channels.
LG 43UK6300 TV with LCD HC430DGG-SLTL5-9111, 42.5 "(108 cm) 16: 9 diagonal size. The required screen brightness of 200 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 1200: 1. The LCD panel is based on the principle of direct display backlighting with rear-mounted LEDs - Direct LED.
HC430DGG-SLTL5-9111 sensor and MainBoard EAX67872805 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 43UK6300 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 x3, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi 802.11ac, Miracast.
The digital tuner can receive TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The power consumed in the operating mode from the network is 95 W. EAX67209001 power supply.
Dimensions: with stand 977x629x216 mm, without stand 977x575x81 mm.
TV weight: with stand: 8.4 kg, without stand: 8.3 kg.
Attention! The HC430DGG-SLTL5-9111 panel of the LG 43UK6300 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.