Technical description and composition of the SAMSUNG UE49K6550AU TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE49K6550AU
Panel: CY-VK049BGLV6V
LED backlight: U6EY 400SM0 LED52 R5
T-CON: LSF490HN02-L
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00871B L40E1_KDY BN44-00871A L40E1N_KDY
MainBoard: BN41-02534B BN94-10994T
IC MainBoard: CPU: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG
Tuner: BN40-00316A
Control: IR: BN41-02515A, WIFI: WCK720Q BN59-01240A
Technical Specifications UE49K6550AU
SAMSUNG UE49K6550AU
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE49K6550AU 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.
Usually with such manifestations, the defect is caused by faulty elements in the main power module BN44-00871B. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches and rectifier diodes of the converters for the probability of a short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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 microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- 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). Board repair and replacement of CPU chips: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
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.
It should be remembered! Attempts to self-repair a SAMSUNG UE49K6550AU TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete failure of the device!
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 UE49K6550AU device:
Installed matrix (LED panel) CY-VK049BGLV6V.
The matrix control uses the Timing Controller (T-CON) LSF490HN02-L.
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 UE49K6550AU TV is carried out by the power module BN44-00871B, 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.
