Technical description and composition of the SAMSUNG UE55RU7300U TV, panel type and modules used. The composition of the modules.
SAMSUNG LED
Model: UE55RU7300U
Chassis / Version: FA04
Panel: CY-CN055HGLV9H
LED backlight: EDGE-LED
LED driver (backlight): integrated into PSU
PWM LED driver: SO-16
MOSFET LED driver: TO-220
Power Supply (PSU): BN44-00932N REV1.1 L55E7_RSM
PWM Power: PFC SO-8, PWM SO-16
MOSFET Power: TO-220, TO-252
MainBoard: BN41-02703A BN94-14277M
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: BN40-00331B
UE55RU7300U Specifications
SAMSUNG UE55RU7300U
General recommendations for TV LCD LED repair
Possible malfunctions
- SAMSUNG UE55RU7300U does not turn on, indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In such cases, the BN44-00932N power supply usually fails. Its output voltages should be measured, and in their absence, check the serviceability of the power switches (TO-220, TO-252) of the converters and rectifier diodes for the probability of a short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and, less often, the current sensor in the source of the key.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) PFC SO-8, PWM SO-16, if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no image, there is sound, it reacts to the remote control. Or the image may appear for a second when turned on and disappear immediately.
Usually, in such cases, there is no backlighting of the LED panel (matrix). Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips EDGE-LED, but sometimes the LED driver is also faulty.
To check the LED strips for breakage without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter; a voltage of the order of several tens of volts is required.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals the standby mode.
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). If it is not possible to replace the MB (SSB) board, you need to check the serviceability of its elements - CPU, eMMC, DRAM, AUDIO, DC / DC. Defective components must be replaced.
In cases where there is no tuning for terrestrial or cable TV channels, you should make sure that the software is correct, as well as that the supply voltages on the terminals of the BN40-00331B tuner match. It is also necessary to check with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.
Attention to users! Self-repair of the SAMSUNG UE55RU7300U TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Additional MainBoard Repair
The appearance of the MainBoard BN41-02703A is shown in the figure below:
BN41-02703A
Main features of the SAMSUNG UE55RU7300U device:
The matrix (LED-panel) CY-CN055HGLV9H is installed.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by an SO-16 PWM controller. TO-220 switches are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE55RU7300U TV is carried out by the BN44-00932N power module, or its analogs using PFC SO-8, PWM SO-16 microcircuits and power switches of the TO-220, 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 UE55RU7300UXRU model from the manufacturer:
Latest firmware updates (latest firmwares):
File type File name Version Date Size
Update file (USB) T-MSLDEUC.zip 1360.9 07/14/2020 1281.07 Mb
Update instruction 2019_TV_Firmware_Upgrade_Instruction_T-MSLDEUC.pdf 1.0 16.06.2020 0.49 Mb
Update file (USB) T-MSLDEUC_1360.9.exe 1360.9 07/14/2020 1280.78 Mb
Update file (USB) T-MSLDEUC_1360.9_RU.exe 1360.9 14.07.2020 1280.78 Mb
User Manuals and Instructions:
File type File name Version Date Size
User manual BN68-09494E-00_URU7300R_EN_L02_190215.1.pdf 00 11.03.2019 0.84 Mb
Brief instructions BN68-09509A-00_QSG_URU7300R_CIS_190213.0.pdf 00 11.03.2019 0.51 Mb
PDF instruction MUSDVBEUR-3.0.0_EM_MUSE_EU_ENG_190820.0.pdf 3.0.0 24.10.2019 22.14 Mb
PDF instruction MUSDVBEUR-3.0.0_EM_MUSE_EU_RUS_190820.0.pdf 3.0.0 10.24.2019 22.12 Mb
------- >Files can be ------- > downloaded from the manufacturer's website for the UE55RU7300UXRU model.
TV SAMSUNG UE55RU7300U with LCD, diagonal size 54.6 "(139 cm) 16: 9 format. The display technology of this model is implemented with LED backlighting.
The design and technical capabilities of the TV are capable of realizing the image in the highest UHD quality at a resolution of 3840x2160 pixels in the 4K UHD, HDR standard. Image processing is performed using modern High Dynamic Range (HDR) technology with an extended range of brightness gradations.
The UE55RU7300U 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 mains is 145 W.
Dimensions: with stand 1236x794x261 mm, without stand 1236x715x104 mm.
TV weight: with stand: 18.1 kg, without stand: 17.8 kg.
Attention! The panel of the SAMSUNG UE55RU7300U LED TV 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.
