Technical description and composition of the SAMSUNG UE40K5100 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40K5100 UE40K5100BU
Chassis / Version: DB02
Panel: CY-FK040BNNV4V
LED backlight: V6LF_395SFB_LED21_-3-11_R3, V6LF_395SFA_LED21_-3-11_R3
T-CON: V400HJ6-PE1 REV.C8
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00867A L40PFP_KSM REV1.2
MainBoard: BN41-02527A BN94-10854S
IC MainBoard: CPU: SENK 17, EEPROM: 24C256, NAND Flash: F59L1G81MA-25TI, SPI Flash: 25Q40CLSIP
Tuner: BN40-00323B
Control: IR: A39802B EZAHA31-IK
Technical Specifications UE40K5100AU
SAMSUNG UE40K5100
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE40K5100 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.
Most likely in this case, the main switching power supply (IIP) BN44-00867A 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 main 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 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 should be remembered that it is not possible to determine the break 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, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-02527A 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board: CPU: SENK 17, EEPROM: 24C256, NAND Flash: F59L1G81MA-25TI, SPI Flash: 25Q40CLSIP. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner BN40-00323B and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, remind users! Attempts to self-repair a SAMSUNG UE40K5100 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard BN41-02527A is shown in the figure below:BN41-02527A
The appearance of the power supply
Main features of the SAMSUNG UE40K5100 device:
Installed matrix (LED panel) CY-FK040BNNV4V.
The matrix control uses the Timing Controller (T-CON) V400HJ6-PE1.
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 UE40K5100 TV is carried out by the power module BN44-00867A, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02527A module, using CPU chips: SENK 17, EEPROM: 24C256, NAND Flash: F59L1G81MA-25TI, SPI Flash: 25Q40CLSIP and others.
The tuner BN40-00323B provides the reception of television programs and tuning to channels.