SAMSUNG LED
Model: UE65MU9000U
Chassis/Version: AA01
Panel: CY-UM065FLAV1V
LED driver (backlight): integrated into PSU
PWM LED driver: SOP-20
MOSFET LED driver: TO-252
Power Supply (PSU): BN44-00912A L65E8NR_MHS
PWM Power: PFC, PWM
MOSFET Power: TO-220
MainBoard: BN41-02570A BN94-11610B
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC/DC
MainBoard: One connect BN94-11965C
Specifications UE65MU9000U
SAMSUNG UE65MU9000U
General recommendations for LCD LED TV repair
Possible problems
- SAMSUNG UE65MU9000U TV does not turn on, does not respond to the remote and the control panel buttons, LEDs are not lit or blinking.
With such manifestations the fault is likely to be found in the power supply module BN44-00912A. It is necessary to measure its output voltages and in case of their absence check the power switches (TO-220) and the rectifier diodes for possible short circuits in the converters.
If there is a breakdown in the secondary circuits, the inverter can usually be short-circuited, and if there is a short circuit in the power elements of the primary circuit, the mains fuse usually blows.
Breakdown of power switches (MosFet) in pulsed sources, sometimes caused by faults in other circuit elements, for example, in the circuits that feed the PWM controller, frequency-retaining or damping circuits, as well as in the negative feedback (negative feedback) stabilization circuits. PWM regulators (PFC) PFC, PWM, if they do not have visible case damage and outright short circuit between pins, are usually checked by replacement.
- No picture, sound is present, the remote control responds, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
Faulty usually in these cases is the backlight of the matrix (LED panel). Often the cause is a faulty LED (breakage, short circuit...), or connectors of the bars (strings), less often faulty is the LED-driver.
Without special power supply it is impossible to check the line of LEDs in series, and it is not safe to use any voltage sources over 12v for this purpose. Then you only have to open the panel and check each LED separately. Usually Chinese multimeters with 9V power supply will light up one 3 volt LED a bit if you connect the probes to it in forward direction, red probe to anode, black probe to cathode. For twin 6-volt LEDs the PN junction of its faulty regulator can be a good indicator. If the LED is faulty, its regulator will either be open or shorted.
- LED on the front panel is blinking, the TV set does not turn on in the working mode, the remote control is unresponsive.
Repair or diagnostic of the mother board BN41-02570A should begin with checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (firmware). Often the MB (SSB) board must be replaced if it has complex faults that are difficult to detect. If you try to repair, you should check its elements - CPU, eMMC, DRAM, AUDIO, DC/DC and replace faulty chips with new ones. Some faults may be associated with the use of modern Main Board BGA soldering technology. Usually such defects are detected by local heating of the chip.
The One connect BN94-11965C tuner malfunction is detected after checking the software and all the supply voltages on its pins. The data exchange between the tuner and the processor via I2C can be checked with an oscilloscope.
If the SAMSUNG UE65MU9000U has no picture but has sound, often the CY-UM065FLAV1V display backlight simply does not work. Moreover, in LED TVs usually fail LEDs inside the panel, less often the LED-driver.
In such cases you can see faintly visible image when external light hits the screen.
To replace the LEDs requires disassembly of the LCD panel CY-UM065FLAV1V - a process which requires the master of experience and expertise. I do not recommend to perform such works by yourself to owners of TV sets and craftsmen who have no experience in LCD panel repair
If there is no image, but backlighting works - the screen becomes slightly lighter when the TV is switched on, and in the open TV you can see the light through the holes in the body of the panel.
In this case the panel may be defective - damage to the strips, cables, for example, as a consequence of moisture after an unsuccessful washing of the screen, the T-CON board (Timing Controller) may be defective. But quite often the MainBoard BN41-02570A is defective and so is the software.
Then first it is necessary to check the panel power 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 normal limits, it is necessary to trace by oscilloscope the LVDS signals from MainBoard BN41-02570A, as well as synchronizing signals to the driver stubs.
The LED TV screens that are flooded or poorly washed can be repaired in about half of the cases, usually if there is no significant damage to the cables and panel strips.
The owners of the UE65MU9000U TV set should address only to the qualified specialists with the necessary experience for the repair! The attempts of repair without proper knowledge and skills can lead to irreversible negative consequences!
More on MainBoard Repair
The exterior of the MainBoard BN41-02570A is shown in the illustration below:
BN41-02570A
MainBoard Appearance
The main features of the SAMSUNG UE65MU9000U:
A matrix (LED panel) CY-UM065FLAV1V is installed.
To power the LED backlight used converter, combined with the power supply, controlled by a PWM controller SOP-20. As the power elements of LED-driver are used switches type TO-252.
The power supply module BN44-00912A or its analogues with the use of PFC, PWM chips and TO-220-type power keys generates the necessary supply voltages for all the components of SAMSUNG UE65MU9000U TV.
MainBoard - the main board (motherboard) is a module BN41-02570A, using CPU, eMMC, DRAM, AUDIO, DC/DC and other chips.
The One connect BN94-11965C tuner provides TV program reception and channel tuning.
Instructions and updates
There are download files for UE65MU9000UXRU from the manufacturer:
Latest software updates, firmwares (latest firmwares):
File type File name Version Date Size
Update file (USB) T-KTMDEUC.zip 1280.5 14.11.2019 1281.95 Mb
Manual update 2017_TV_Firmware_Upgrade_Instruction_1.0_T-KTMDEUC.pdf 1.0 28.11.2018 0.28 Mb
Update file (USB) T-KTMDEUC_1280.5.exe 1280.5 14.11.2019 1281.65 Mb
Instructions and user manuals (User Manuals):
File Type File Name Version Date Size
Installation Guide QSG_UMU9000A_CIS_BN68-08455C-01_170719.0.pdf 01 02.08.2017 0.85 Mb
Instruction PDF ENG_KTMDVBEUL-3.0.7_180111.1.pdf 3.0.7 23.01.2018 13.11 Mb
You can download the files from the manufacturer's website for the UE65MU9000UXRU model.
Technical description
SAMSUNG UE65MU9000U TV with LCD CY-UM065FLAV1V, measuring 64.5" (164 cm) diagonally in 16:9 aspect ratio. This model uses a panel with an end arrangement of LEDs in the display backlight - Edge LED.
Matrix CY-UM065FLAV1V and MainBoard software BN41-02570A are able to realize the image in the highest quality UHD at 3840x2160 pixels in 4K UHD, HDR. Image processing is made by modern technology High Dynamic Range (HDR) with an extended range of brightness gradation.
Model UE65MU9000U TV has built-in software (software) SMART and installed the operating system Tizen. Connection to the network can be made via wireless Wi-Fi connection. Supported media formats: MP3, WMA, MPEG4, HEVC (H.265), DivX, MKV, JPEG.
The sound system has a capacity of 40 watts (2x10 + 2x10 watts) provided by 4 speakers. NICAM stereo sound processing system and Sound Surround surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), HDMI x4, USB x3, Ethernet (RJ-45), Bluetooth, Wi-Fi 802.11ac, WiDi, Miracast. The digital tuner is capable of receiving DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2 TV channels.
The power consumption of the worker in mains mode is 164 W. Power supply BN44-00912A.
Overall dimensions: with stand 1443x927x407 mm, without stand 1443x838x59 mm.
TV weight: with stand 29kg, without stand 26.4kg.
Warning. The panel CY-UM065FLAV1V LED-TV SAMSUNG UE65MU9000U is an expensive and unreliable part of it.
Do not allow any impact on the glass and pressure on the surface of the screen to avoid damage to the LED-panel!
Also it is not safe to get liquid on the screen. Sometimes one drop is enough if it drips down the glass onto the cables and the TV becomes unrepairable.