Technical description and composition of the SAMSUNG UE65KS8000U TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE65KS8000U
Chassis / Version: BN41-02504A
Panel: CY-QK065FLLV4V
LED backlight: Edge LED 2 String
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00880A REV1.0 L65E8N_KSM
PWM Power: PFC, PWM
MOSFET Power: N-FET TO-220F
MainBoard: BN41-02504A BN94-10770A
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: One connect BN94-10924E
Technical Specifications UE65KS8000U
SAMSUNG UE65KS8000U
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE65KS8000U does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
In some of these cases, a fault is detected in the BN44-00880A power supply module. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (N-FET TO-220F) and rectifier diodes of the converters for possible short circuit.
In case of diode breakdowns 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.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) PFC, PWM, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound and all other functions of the TV work. The image sometimes for a second appears immediately after turning on and disappears.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power (LED driver).
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-02504A 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). Often, the MB (SSB) card needs to be replaced in case of complex faults that are difficult to detect. When trying to repair, you should check its elements - CPU, eMMC, DRAM, AUDIO, DC / DC and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
The malfunction of the tuner One connect BN94-10924E is established after checking the software and all the 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 TV owners! Attempts to self-repair SAMSUNG UE65KS8000U are not recommended by the manufacturer and can lead to serious negative consequences!
The appearance of the MainBoard BN41-02504A is shown in the figure below:BN41-02504A
The appearance of the power supply
Main features of the SAMSUNG UE65KS8000U device:
Installed matrix (LED panel) CY-QK065FLLV4V.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SAMSUNG UE65KS8000U TV are generated by the BN44-00880A power module or its analogs using PFC, PWM microcircuits, and N-FET TO-220F type power switches.
MainBoard - the main board (motherboard) is a BN41-02504A module, using CPU, eMMC, DRAM, AUDIO, DC / DC and other chips.
The One connect BN94-10924E tuner provides TV reception and channel tuning.
