Technical description and composition of the SAMSUNG UE50RU7100U TV, panel type and modules used. The composition of the modules.SAMSUNG LED
Model: UE50RU7100U
Chassis / Version: AA07
Panel: CY-NN050HGAV1H
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00932Q REV1.2 L55E7_RHS
PWM Power: PFC, PWM
MOSFET Power: TO-252, TO-220F
MainBoard: BN41-02703A BN94-14756K
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: BN40-00331B
Specifications UE50RU7100U
SAMSUNG UE50RU7100U
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- TV SAMSUNG UE50RU7100U does not turn on, does not respond to the remote control and control panel buttons, does not light or blink indicators.
Most often, with similar manifestations, the main power module BN44-00932Q turns out to be faulty. It is then necessary to measure its output voltages and, in their absence, the power switches and rectifier diodes of the converters should be checked for the probability of a short circuit.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short-circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key most often breaks off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) PFC, PWM, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with known good ones.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
A malfunction is usually in these cases most likely in the backlight units of the display matrix. Often the reason is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the strips (strings), less often the LED driver turns out to be faulty.
It is impossible to check the line of series-connected LEDs without a special current source, and it is unsafe for them to use any voltage sources above 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Typically, Chinese multimeters with a 9V power supply lightly light up one 3-volt LED if you connect the probes to it in the forward direction, the red probe to the anode, and the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the K / Z.
- 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 BN41-02703A motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Repair of the board and replacement of CPU, eMMC, DRAM, AUDIO, DC / DC microcircuits are made if the necessary equipment and the corresponding element base are available. Failures associated with the use of BGA soldering technologies can be localized by warming up.
Before replacing the BN40-00331B tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. You also need to make sure that the tuner and processor can exchange data via the I2C bus
Remember! Attempts to repair the SAMSUNG UE50RU7100U TV yourself, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Additional MainBoard RepairThe appearance of the MainBoard BN41-02703A is shown in the figure below:
BN41-02703A
External view of the power supply
Main features of the SAMSUNG UE50RU7100U device:
The matrix (LED panel) CY-NN050HGAV1H is installed.
A converter combined with a power supply is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE50RU7100U TV is carried out by the BN44-00932Q power module, or its analogs using PFC, PWM chips and power switches of the TO-252, TO-220F type.
MainBoard - the main board (motherboard) is a BN41-02703A module using CPU, eMMC, DRAM, AUDIO, DC / DC and others.
Tuner BN40-00331B provides reception of television programs and tuning to channels.
There are files to download for the UE50RU7100UXRU model from the manufacturer:Latest firmware updates (latest firmwares):File type File name Version Date SizeUpdate file (USB) T-MSLDEUC.zip 1360.9 14.07.2020 1281.07 MbUpdate instruction 2019_TV_Firmware_Upgrade_Instruction_T-MSLDEUC.pdf 1.0 16.06.2020 0.49 MbUpdate file (USB) T-MSLDEUC_1360.9.exe 1360.9 07/14/2020 1280.78 MbUpdate file (USB) T-MSLDEUC_1360.9_RU.exe 1360.9 14.07.2020 1280.78 MbUser Manuals and Instructions:File type File name Version Date SizeUser manual BN68-09495D-00_URU7100H_EN_L02_190215.1.pdf 00 13.03.2019 0.86 MbBrief instructions BN68-09510A-00_QSG_URU7100H_CIS_190208.0.pdf 00 03/13/2019 0.45 MbUser manual BN68-09495S-00_URU7100H_CE_L05_190516.0.pdf 00 05.06.2019 1.95 MbPDF manual MUSDVBEUR-3.0.0_EM_MUSE_EU_ENG_190820.0.pdf 3.0.0 10.24.2019 22.14 MbPDF instruction MUSDVBEUR-3.0.0_EM_MUSE_EU_RUS_190820.0.pdf 3.0.0 10.24.2019 22.12 MbFiles can be downloaded from the manufacturer's website for the UE50RU7100UXRU model.
SAMSUNG UE50RU7100U TV with LCD CY-NN050HGAV1H, diagonal size 50 "(127 cm) 16: 9 format. The display technology of this model is implemented with LED backlighting.
CY-NN050HGAV1H sensor and MainBoard BN41-02703A software are capable of realizing images in the highest UHD quality at a resolution of 3840x2160 pixels in 4K UHD, HDR standard. Image processing is performed using modern High Dynamic Range (HDR) technology with an extended range of brightness gradations.
The UE50RU7100U 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, HEVC (H.265), MKV, JPEG.
Speaker sound system 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, Miracast.
The digital tuner can receive TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The power consumed when operating from the network is 135 W. BN44-00932Q power supply.
Dimensions: with stand 1125x729x261 mm, without stand 1125x650x59 mm.
TV weight: with stand: 13.9 kg, without stand: 13.6 kg.
Attention! Panel CY-NN050HGAV1H LED TV SAMSUNG UE50RU7100U is an expensive and unreliable element.
Do not allow any impact 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.
