Technical description and composition of the SAMSUNG UE55K5500 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE55K5500 UE55K5500BU
Chassis / Version: BN41-02534B
Panel: ST5461B07
T-CON: TT5461B07
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00872B
MainBoard: BN41-02534B
IC MainBoard: CPU: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG
Tuner: BN40-00316A
Technical Specifications UE55K5500AU
SAMSUNG UE55K5500
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE55K5500 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.
With such manifestations, a malfunction is most likely to be detected in the BN44-00872B power module. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
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.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
Usually in such cases there is no backlight LED-panel (matrix). The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, sometimes you can detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- 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 BN41-02534B 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). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If there is no reception of television channels, but the TV works properly from external devices, first of all, check the voltage of the tuner BN40-00316A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
We recommend the owners of the UE55K5500 TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
The appearance of the MainBoard BN41-02534B is shown in the figure below:BN41-02534B
BN41-02534B can be used in TVs:
SAMSUNG UE40K5500 (Panel CY-KK040BGLV1V), SAMSUNG UE32K5500 UE32K5500AW (Panel CY-KK032BGAV1V), SAMSUNG UE49K5500 UE49K5500BU (Panel CY-KK049BGLV1V).
Main features of the SAMSUNG UE55K5500 device:
Installed matrix (LED panel) ST5461B07.
The matrix control uses the Timing Controller (T-CON) TT5461B07.
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 UE55K5500 TV is carried out by the BN44-00872B power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02534B module using CPU chips: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG and others.
The tuner BN40-00316A provides the reception of television programs and tuning to channels.
