Technical description and composition of the ERISSON 43ULEA99T2 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 43ULEA99T2 43ULEA99T2SM
Chassis / Version: MSD6586-T8E2
Panel: K430WD9
LED backlight: K420WD7 A3 4708-K420WD-A3213K01
T-CON: 6870C-0726A V17_43 / 49UHD_SONY T-CON_60Hz_Ver0.3
LED driver (backlight): integrated into PSU
Power Supply (PSU): K-PL-L03 LYP03663B0 (X)
PWM Power: PWM SOT23-6 OB2273
MainBoard: MSD6586-T8E2
Tuner: CDT-9NT372-62
Control: IR: 4707-43L73F-A1233K01, WiFi: BL-R8188NU3
Smart Specifications
ERISSON 43ULEA99T2
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The ERISSON 43ULEA99T2 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In some of these cases, a fault is detected in the K-PL-L03 power module. 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 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 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) PWM SOT23-6 OB2273, 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 and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips, but sometimes the LED driver also turns out to be faulty.
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 blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard MSD6586-T8E2 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 the TV works normally from external devices, but does not tune into television channels, the tuner CDT-9NT372-62 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.
Attention to users! Self-repair of the ERISSON 43ULEA99T2 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard MSD6586-T8E2 is shown in the figure below:
MSD6586-T8E2
The appearance of the power supply
Main features of the ERISSON 43ULEA99T2 device:
Installed matrix (LED-panel) K430WD9.
The matrix control uses the Timing Controller (T-CON) 6870C-0726A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the TV ERISSON 43ULEA99T2 are formed by the power module K-PL-L03, or its analogs using PWM SOT23-6 OB2273 microcircuits.
MainBoard - the main board (motherboard) is an MSD6586-T8E2 module.
The tuner CDT-9NT372-62 provides the reception of television programs and tuning to channels.