Technical description and composition of the LG 49UH603V TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 49UH603V
Chassis / Version: UD65S
Panel: LC490DGE (FJ) (M2)
LED backlight: 6916L-2705A, 6916L-2706A, 6916L-2707A, 6916L-2708A
T-CON: 6870C-0584B
LED driver (backlight): integrated into PSU; 115V 500mA
Power Supply (PSU): EAX66923201 (1.4) EAY64388811 LGP49LIU-16CH1
MainBoard: EAX66943504 (1.0)
IC MainBoard: CPU: LGE6551-DA, EMMC: THGBMBG5D1KBAIL, EEPROM: 24C256
Tuner: TDJM-G301D EBL61741501
Specifications 49UH603V
LG 49UH603V
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 49UH603V TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
With such manifestations, a malfunction is most likely to be detected in the EAX66923201 power module. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, it is necessary to check the serviceability of power switches and rectifier diodes for possible breakdown (short circuit).
In case of breakdowns of semiconductors in secondary circuits, the converter can usually operate abnormally in 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, 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.
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.
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 TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the EAX66943504 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).
Before replacing the TDJM-G301D EBL61741501 tuner, if there is no tuning for the channels, 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
Attention TV owners! Attempts at self-repair of LG 49UH603V are not recommended by the manufacturer and can lead to serious negative consequences!
CHASSIS : UD65S; MODEL : 43UH603V, 49UH603V, 43UH603V-ZE, 49UH603V-ZE
Service manual / schematic diagram --------------> LG 49UH603V Chassis UD65S.
The appearance of the MainBoard EAX66943504 is shown in the figure below:EAX66943504
EAX66943504 can be used in TVs:
LG 43UH619V (Panel HC430DGN-SLNXG-211X), LG 49UH603V (Panel LC490DGE (FJ)(M2)), LG 43UH603V (Panel LC430DGE (FJ)(M2)), LG 43UH610V (Panel HC430DGN-SLNX5-5112).
The appearance of the power supply
Main features of the device LG 49UH603V:
Installed matrix (LED-panel) LC490DGE (FJ) (M2).
The matrix control uses the Timing Controller (T-CON) 6870C-0584B.
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 49UH603V TV is carried out by the EAX66923201 power module, or its analogues.
MainBoard - the main board (motherboard) is an EAX66943504 module, using CPU chips: LGE6551-DA, EMMC: THGBMBG5D1KBAIL, EEPROM: 24C256 and others.
Tuner TDJM-G301D EBL61741501 provides the reception of television programs and tuning to channels.
