Technical description and composition of the SAMSUNG UE43RU7100U TV, panel type and modules used. The composition of the modules.SAMSUNG LED
Model: UE43RU7100U
Chassis / Version: BN41-02703A
Panel: CY-NN043HGAB1V
LED backlight: V8N1-430SM0-R0
LED driver (backlight): integrated into PSU
PWM LED driver: SOP-16
MOSFET LED driver: TO-220F
Power Supply (PSU): BN44-00947J L43E7_RSM
PWM Power: PFC, PWM
MOSFET Power: TO-252
MainBoard: BN41-02703A BN94-14189M
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: BN40-00331B
Specifications UE43RU7100U
SAMSUNG UE43RU7100U
General recommendations for TV LCD LED repair
Possible malfunctions
- SAMSUNG UE43RU7100U TV does not turn on at all. Control lamps do not light up or blink. The TV on the remote control and control panel buttons does not respond.
In some of these cases, the main switching power supply, the BN44-00947J module, is faulty. Its output voltages should be measured and, in their absence, the power switches (TO-252) and rectifier diodes should be checked for the probability of a short circuit in the converters.
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 a 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 and reaction to commands from the remote control. Or the image appears immediately after switching on and disappears.
The most likely problem in these cases is a malfunction of the LED backlight. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power supply (LED driver).
It should be remembered that it is not possible to determine an open circuit in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then you need to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow opening the LED in the forward direction or dual LEds are used, then the PN transition of the emergency zener diode can indirectly serve as an indicator of serviceability. In the event of a malfunction of the LED-a, the PN-junction of the zener diode will either be cut off or broken into 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). In cases of attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - CPU, eMMC, DRAM, AUDIO, DC / DC which may need to be replaced with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its pins with the board (detected by warming up).
If you suspect a malfunction of the BN40-00331B tuner, first of all, you need to make sure that the software is correct, as well as the presence of the necessary levels of supply voltages and pulses of data exchange with the processor via the I2C bus on the corresponding terminals of the tuner.
Remember! Attempts to self-repair the SAMSUNG UE43RU7100U TV, 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 UE43RU7100U device:
The matrix (LED-panel) CY-NN043HGAB1V is installed.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by the SOP-16 PWM controller. TO-220F switches are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE43RU7100U TV is carried out by the BN44-00947J power module, or its analogs using PFC, PWM microcircuits and power switches of the TO-252 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 UE43RU7100UXRU model from the manufacturer:Latest firmware updates (latest firmwares):File type File name Version Date SizeUpdate file (USB) T-MSLDEUC.zip 1360.9 07/14/2020 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 MbInstruction PDF MUSDVBEUR-3.0.0_EM_MUSE_EU_ENG_190820.0.pdf 3.0.0 24.10.2019 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 UE43RU7100UXRU model.
SAMSUNG UE43RU7100U TV with LCD CY-NN043HGAB1V, diagonal size 42.5 "(108 cm) 16: 9 format. The display technology of this model is implemented with LED backlighting.
CY-NN043HGAB1V sensor and MainBoard BN94-14884R software are capable of realizing images in the highest UHD quality at 3840x2160 resolution in 4K UHD, HDR standard. Image processing is performed using modern High Dynamic Range (HDR) technology with an extended range of brightness gradations.
The UE43RU7100U 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 120 W. Power supply BN44-00947J.
Dimensions: with stand 970x636x210 mm, without stand 970x563x58 mm.
TV weight: with stand: 9.8 kg, without stand: 9.6 kg.
Attention! Panel CY-NN043HGAB1V LED TV SAMSUNG UE43RU7100U 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.
