Technical description and composition of the SAMSUNG UE43KU6670U TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE43KU6670U UE43KU6670
Chassis / Version: BN41-02528A
Panel: CY-VK043HQAV4V
LED backlight: EDGE LED 7030 Curved
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00875A L40E6_KSM REV1.1 PSLF141E08A
PWM Power: PFC, PWM
MOSFET Power: TO-252 N-FET
MainBoard: BN41-02528A BN94-11054A
IC MainBoard: SDP1531, 25Q40, 25Q80, 24C512, K4F8E304H, K4F2E3S4H
Tuner: BN40-00323A
Technical Specifications UE43KU6670U
SAMSUNG UE43KU6670U
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE43KU6670U TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the control buttons.
In some of these cases, the main switching power supply, the BN44-00875A module, turns out to be faulty. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches (TO-252) of the converters and rectifier diodes for a short circuit probability.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key 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, PWM, PWM microchips are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and all the other functions of the TV work. The image sometimes for a second appears immediately after turning on and disappears.
Failure in most such cases is detected in the nodes and backlight elements of the 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 thong connectors,
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a malfunction, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements SDP1531, 25Q40, 25Q80, 24C512, K4F8E304H, K4F2E3S4H. BGA chip malfunctions are usually easy to detect by warming up.
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 UE43KU6670U 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-repairability 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 UE43KU6670U device:
Installed matrix (LED panel) CY-VK043HQAV4V.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SAMSUNG UE43KU6670U TV are generated by the BN44-00875A power supply module or its analogs using PFC, PWM microcircuits and TO-252 N-FET power switches.
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.