Technical description and composition of the SAMSUNG UE55F9000 TV, type of panel and modules used. Module composition.
SAMSUNG LED
Model: UE55F9000 UE55F9000AT
Panel: CY-KF550FSLV1H // CY-KF550FSLV2J
LED backlight: BN96-29071A 29071A V5LE-550SMA-R2 V5LE-550SMB-R2
T-CON: VD_5565EU22BC6LV0.1
LED driver (backlight): integrated into PSU
PWM LED driver: SOP-20
MOSFET LED driver: TO-252
Power Supply (PSU): BN44-00675A L65D2L_DSM PSLF371D05A
PWM Power: PFC, PWM
MOSFET Power: TO-220
MainBoard: BN41-02116A & BN41-02076B
IC MainBoard: SDP1201, SDP1202, SDP1210, SDP1211
MainBoard: One connect
Specifications UE55F9000
SAMSUNG UE55F9000
General recommendations for LCD LED TV repair
Possible Faults
- SAMSUNG UE55F9000 TV does not turn on at all. No reaction to the remote control and the control buttons on the front panel. Indicator lights are not lit or blinking.
In such cases the power supply unit BN44-00675A usually appears to be defective. Then we recommend to measure its output voltage and in case of its absence you should check the serviceability of the power switches (TO-220) and the inverter rectifier diodes for the probable short circuit.
If there is a breakdown in the secondary circuits, the inverter can usually be short-circuited, and a short in the power elements of the primary circuit will usually blow the mains fuse.
Mos-Fet switches used in switching power supplies usually fail due to the failure of other elements that can take it out of key mode, or cause it to exceed the maximum current or voltage. These may be the circuits feeding the PWM controller, the damping or frequency-retaining circuits, or the negative feedback elements in the stabilization circuit. PWM controllers (PFC) PFC, PWM, if there is no external damage and short circuit between the pins, are checked by replacing with known good ones.
- No picture, but there is sound and reaction to remote control commands. Or the image appears just after switching on and disappears.
As a rule, in this case the LED panel backlight is defective. The cause of the malfunction is usually in the broken LEDs or in the connectors of the LED strips BN96-29071A 29071A V5LE-550SMA-R2 V5LE-550SMB-R2, but sometimes the LED driver is at fault.
It is impossible to check the LED lines for breakage without disassembling the panel with a multimeter or a tester. For this purpose, you need to open all the series-connected PN-junctions and will need a voltage of about tens of volts, and ideally - a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to light up a single 3 volt LED slightly in the forward direction. In the case of twin 6 volt LEDs, the PN junction of its safety regulator may be a good indicator. Faulty LEDs will either have a broken regulator or a short circuit.
- The TV does not go into the operating mode, the remote control does not respond. Front panel LED is either on continuously or is blinking.
If the SAMSUNG UE55F9000 has no picture but has sound, often the CY-KF550FSLV1H display backlight simply does not work. Moreover, in LED TVs usually fail the LEDs inside the panel, less often the LED-driver.
In such cases you can see a faintly visible image when external light hits the screen.
To replace the LEDs requires disassembly of the LCD panel CY-KF550FSLV1H - a process which requires a master of experience and skill. We do not recommend to perform such works by yourself to owners of TV sets and masters 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 turned 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 BN41-02116A 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 BN41-02116A, as well as synchronizing signals to driver stubs.
Filled or unsuccessfully washed LED TV screens can be restored in about half of the cases, usually, if there is no significant damage in the cables and panel bars.
Repair or diagnostic of main board BN41-02116A should be started with checking stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, software (software) should be updated or replaced. In cases of MB (SSB) complex repairs and with the necessary skills and equipment sometimes it may be necessary to replace its chips SDP1201, SDP1202, SDP1210, SDP1211 and other possible defective components. Faults associated with the use of BGA soldering techniques are usually easily diagnosed by the heating method.
If there is no TV channel reception, but the TV works fine with external devices, the first thing to do is to check the power supply voltage of the One connect tuner and update the software. I2C communication pulses should be monitored with an oscilloscope.
Warning to the users! Unauthorized repair of SAMSUNG UE55F9000 TV without the appropriate qualification and experience can lead to its complete unrepairability!
More on MainBoard Repair
The exterior of the MainBoard BN41-02116A is shown in the figure below:
BN41-02116A
MainBoard Appearance
The main features of the SAMSUNG UE55F9000:
A matrix (LED panel) CY-KF550FSLV1H or CY-KF550FSLV2J is installed.
The matrix is controlled by the Timing Controller (T-CON) VD_5565EU22BC6LV0.1.
A converter combined with a power supply is used to power the LED backlight and is controlled by a SOP-20 PWM controller. The power elements of the LED driver are used as TO-252-type switches.
The formation of the necessary supply voltages for all components of the TV SAMSUNG UE55F9000 performs power supply module BN44-00675A, or its analogues using PFC, PWM chips and power switches such as TO-220.
MainBoard - the main board (motherboard) is a module BN41-02116A, using microcircuits SDP1201, SDP1202, SDP1210, SDP1211 and others.
The One connect tuner allows you to receive TV programs and tune to channels.
Instructions and updates
There are downloads available for the UE55F9000STXXU model from the manufacturer:
Latest software updates, firmwares (latest firmwares):
File Type File Name Version Date Size
Firmware Update User Manual 2013_TV_Firmware_Upgrade_Instruction.pdf 1.0 09.12.2013 0.41 Mb
Update file (USB) T-FXP9DEUC_2237.0.exe 2237.0 05.12.2019 757.02 Mb
Instructions and user manuals (User Manuals):
File Type File Name Version Date Size
Installation Guide UF9000-QSG-BN68-05118W-00-0724.pdf 1.0 02.09.2015 2.5 Mb
User manual [ENG]FPDVBEUF-1.004-0401.pdf 1.0 13.04.2013 5.08 Mb
You can download the files for the model UE55F9000STXXU from the manufacturer's website.
SAMSUNG UE55F9000 LCD TV CY-KF550FSLV1H, measuring diagonally 55" (140 cm) in 16:9 aspect ratio. In the manufacturing technology of the display of this model is implemented LED backlighting.
There is support for 3D images with an active (shutter) technology to separate the right and left channels.
Matrix CY-KF550FSLV1H and MainBoard software BN41-02116A able to realize the image in the highest quality UHD at a resolution of 3840x2160 pixels in 4K UHD standard.
UE55F9000 TV is equipped with SMART software, built-in applications and internet connectivity. Connection to the network can be made via Wi-Fi wireless communication. Input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphical processing of a digital signal is done in 480i, 480p, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
The sound system capacity of 70 W (2x15 2x20 W) is 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), AV x2, component, SCART, RGB, HDMI x4, MHL, USB x3, Ethernet (RJ-45), Wi-Fi. To connect a computer or laptop to this model of TV there is a VGA (D-Sub 15) connector. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080. The digital tuner is able to receive DVB-T, DVB-C, DVB-S2 TV channels.
The power supply BN44-00675A is used.
Dimensions: with stand 1246x764x220 mm, without stand 1246x717x39 mm.
Attention! The CY-KF550FSLV1H panel of the SAMSUNG UE55F9000 LED TV 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.
