Technical description and composition of the SAMSUNG UE43KU6500U TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE43KU6500U
Chassis / Version: AA01
Panel: CY-VK043HGAV4V T430QVR01.0
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00875A L40E6_KSM PSLF141E08A
MainBoard: BN41-02528A BN94-10783A / BN94-10783D
IC MainBoard: SDP1531, 25Q40, 25Q80, 24C512, K4F8E304H, K4F2E3S4H
Tuner: BN40-00323A
Control: WIFI: BN59-01239A WCK730B
Technical Specifications UE43KU6500U
SAMSUNG UE43KU6500U
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE43KU6500U TV does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up and do not blink.
With such manifestations, a malfunction is most likely to be detected in the BN44-00875A power supply 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 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.
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 key parameters. 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. Or the image may appear for a second when turned on and immediately disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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.
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. Usually, 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 a health indicator. In the event of a LED malfunction, its 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 BN41-02528A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). When repairing an MB board, you need to check its components SDP1531, 25Q40, 25Q80, 24C512, K4F8E304H, K4F2E3S4H. 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.
Before changing the tuner BN40-00323A, if it is not possible to tune to television channels, 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! For users and owners of UE43KU6500U TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
The appearance of the MainBoard BN41-02528A is shown in the figure below:BN41-02528A
BN41-02528A can be used in TVs:
SAMSUNG UE43KU6650U (Panel CY-VK043HGAV5V), SAMSUNG UE43KU6000W UE43KU6000 (Panel CY-GK043HGEV1H), SAMSUNG UE55KU6400 UE55KU6400U (Panel CY-KK055HQLV4H), SAMSUNG UE49KU6670 UE49KU6670U (Panel CY-VK049HGLV4V), SAMSUNG UE40KU6000U (Panel LSF400FN05-L03 CY-GK040HGLV4V), SAMSUNG UE40KU6300U (Panel CY-WK040HGLV1V), SAMSUNG UE43KU6500U (Panel CY-VK043HGAV4V T430QVR01.0), SAMSUNG UE40KU6402U (Panel CY-KK040HGNV4H).
The appearance of the power supply
Main features of the SAMSUNG UE43KU6500U device:
Installed matrix (LED panel) CY-VK043HGAV4V T430QVR01.0.
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 SAMSUNG UE43KU6500U television is carried out by the power module BN44-00875A, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02528A module, using microchips SDP1531, 25Q40, 25Q80, 24C512, K4F8E304H, K4F2E3S4H and others.
The tuner BN40-00323A provides the reception of television programs and tuning to channels.