REPAIRING / SERVICING TV SAMSUNG UE40K6500

Technical description and composition of the SAMSUNG UE40K6500 TV, panel type and modules used. The composition of the modules.

SAMSUNG LED
Model: UE40K6500 UE40K6500AU

Chassis / Version: FA01

Panel: CY-VK040BGLV1V

T-CON: BN41-02481A LS400HN02 SK98BN950

LED driver (backlight): integrated into PSU

PWM LED driver: SLC7015R02

Power Supply (PSU): BN44-00871A L40E1_KDY

PWM Power: FA1A50N, FA6A21N

MOSFET Power: 60R580P

MainBoard: BN41-02534B BN94-10994T

IC MainBoard: CPU: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG

Tuner: BN40-00318A

Control: IR: BN41-02515A, WiFi: WCK720Q

UE40K6500AU Specifications
SAMSUNG UE40K6500
General recommendations for TV LCD LED repair
Possible manifestations of defects

- TV SAMSUNG UE40K6500 does not turn on and does not show any signs of operability at all. No response to the remote control and front panel control buttons.

With such manifestations, the power module BN44-00871A usually fails. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches (60R580P) and rectifier diodes for a possible short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse is usually cut off.
Breakdown of Mos-Fet keys used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) FA1A50N, FA6A21N are usually checked by replacing them with new ones, or known to be working properly.

- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately

Usually, in such cases, a malfunction is detected in the LED panel backlight nodes. The reason can sometimes be in the power supply of the LEDs, but more often in their malfunction (breakdown or open circuit), sometimes in the violation of the contact connections of the LED strips.
When diagnosing, it must be borne in mind that it is impossible to check for an open in the circuit of the 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, you can check each LED separately. Typically, Chinese multimeters will lightly light one 3-volt LED if you connect the probes to it in the forward direction. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the SC.

- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.

Repair or diagnostics of the BN41-02534B motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) elements of the MainBoard - CPU: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG. In cases where a BGA processor is used, its malfunction is usually detected by the local warm-up method.

If the TV operates normally from external devices, but does not tune to TV channels, the BN40-00318A tuner may be faulty. In such cases, first of all, you should make sure that the supply voltage is present at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the reason for the inoperability of the tuner may be a software failure.

If SAMSUNG UE40K6500AU has no picture, but there is sound, often the display backlight CY-VK040BGLV6V simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.

Replacing the LEDs requires disassembling the LCD panel CY-VK040BGLV6V - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels

If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV, light is visible through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard BN41-02534B often turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, it is necessary to trace the passage of LVDS signals from the MainBoard BN41-02534B with an oscilloscope, as well as synchronization signals to the loops with drivers.

Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.

Users and owners of TVs should remember that attempts to self-repair a SAMSUNG UE40K6500 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences! Do not attempt self-repair without the relevant knowledge, experience and necessary qualifications!

Additional MainBoard Repair

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).


External view of the power supply

Main features of SAMSUNG UE40K6500 device:

Installed matrix (LED-panel) CY-VK040BGLV1V.
Matrix control uses the BN41-02481A Timing Controller (T-CON).
To power the backlight LEDs, a converter combined with a power supply is used, controlled by the SLC7015R02 PWM controller.

The formation of the necessary supply voltages for all nodes of the SAMSUNG UE40K6500 TV is carried out by the BN44-00871A power module, or its analogs using FA1A50N, FA6A21N microcircuits and power switches of the 60R580P type.
MainBoard - the main board (motherboard) is a BN41-02534B module, using CPU chips: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG and others.
Tuner BN40-00318A provides reception of television programs and tuning to channels.



Instructions and updates

There are files to download for the UE40K6500AUXTK  model from the manufacturer:

Latest firmware updates (latest firmwares):
File type File name Version Date Size
Update instruction 2016_TV_Firmware_Upgrade_Instruction_1.0_T-HKMFKDEUC.pdf 1.0 27.11.2018 0.35 Mb
Update file (USB) T-HKMFKDEUC.zip 1242.0 02/18/2020 991.11 Mb
Update file (USB) T-HKMFKDEUC_1242.0.exe 1242.0 02/18/2020 990.9 Mb
Update file (USB) T-HKMFKDEUC_1242.0_RU.exe 1242.0 18.02.2020 990.9 Mb

User Manuals and Instructions:
File type File name Version Date Size
User manual K6300_EN_BN68-07871H-00_2016.05.16.pdf 00 09.11.2016 20.99 Mb
Installation Guide K6300_CIS_QSG_BN68-07991R_01_160603.0.pdf 01 09.11.2016 3.58 Mb
Instruction PDF ENG-HMFDVBEUK-1.0.8.pdf 1.0.8 16.12.2016 21.56 Mb
Instruction PDF RUS-HMFDVBEUK-1.0.8.pdf 1.0.8 16.12.2016 21.71 Mb

Files can be downloaded from the manufacturer's website for the UE40K6500AUXTK  model.


SAMSUNG UE40K6500AU TV with LCD CY-VK040BGLV6V, diagonal size 40 "(102 cm) 16: 9 format. The display technology of this model is implemented with LED backlighting.
The CY-VK040BGLV6V matrix and the software of the MainBoard BN41-02534B provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphics decomposition at 1080p (Full HD).
The UE40K6500AU TV is equipped with SMART software, built-in applications and the ability to work on the Internet. The connection to the network can be carried out via Wi-Fi wireless connection. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x3, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi. The digital tuner is capable of receiving television channels in the DVB-T, DVB-T2, DVB-C, DVB-S2 standards.

The power consumed when operating from the network is 95 W. BN44-00871A power supply.

Dimensions: with stand 916x607x251 mm, without stand 916x541x89 mm.

TV weight: with stand: 10.1 kg, without stand: 9 kg.

Attention! Panel CY-VK040BGLV6V of LED TV SAMSUNG UE40K6500AU is an expensive and unreliable element.
Avoid any impacts on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.