Technical description and composition of the SAMSUNG UE43M5500AU TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE43M5500AU
Panel: T430HVN01.6 // CY-KK043BGAV3V
LED backlight: LM41-00299A 43 SFL70 56LED
T-CON: T430HVN01.6 CTRL BD 43T01-C04
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00871C L40E1R_KDY
MainBoard: BN41-02575B BN94-11891C
IC MainBoard: CPU: SDP1604
Tuner: BN40-00331B
Control: WIFI & BLUETOOTH: WCM730Q BN59-01264A
Technical Specifications UE43M5500AU
SAMSUNG UE43M5500AU
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SAMSUNG UE43M5500AU 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.
Often in such cases, the BN44-00871C power module is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse 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 circuits are usually checked by replacement with new ones, or known to be working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Usually, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. 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 blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-02575B 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). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard - CPU: SDP1604. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
The malfunction of the tuner BN40-00331B is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention to users! Self-repair of a SAMSUNG UE43M5500AU TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard BN41-02575B is shown in the figure below:BN41-02575B
Main features of the SAMSUNG UE43M5500AU device:
Installed matrix (LED-panel) T430HVN01.6 or CY-KK043BGAV3V.
The matrix control uses the Timing Controller (T-CON) T430HVN01.6.
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 UE43M5500AU TV is carried out by the BN44-00871C power supply module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02575B module, using CPU chips: SDP1604 and others.
The tuner BN40-00331B provides the reception of television programs and tuning to channels.