Technical description and composition of the SUPRA STV-LC50ST910FL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC50ST910FL
Chassis / Version: V1N12
Panel: LC490DUJ-SGE1
T-CON: 6870C-0481A
LED driver (backlight): integrated into PSU
Power Supply (PSU): AY089D-4SF 06 AY1445A013981 YS-E5010-01000102
MainBoard: CV9202H-CSM & R.RK3066TVP.A12
IC MainBoard: CPU: SPV9202, SPI Flash: 25Q64, AUDIO: TPA3110LD2
Tuner: NoName
STV-LC50ST910FL Specifications
SUPRA STV-LC50ST910FL
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- SUPRA STV-LC50ST910FL does not turn on, indicators on the front panel do not light or flash. The TV does not respond to control buttons and the remote control.
Often in such cases, the power module AY089D-4SF06 is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for possible partial or complete breakdown.
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 is most often cut off.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. PWM controllers, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or knowingly working properly.
- 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.
As a rule, in such cases there is no display backlight. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- 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 CV9202H-CSM 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: SPV9202, SPI Flash: 25Q64, AUDIO: TPA3110LD2 which may require replacement 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 (indicated by warming up).
If there is no reception of TV channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the NoName tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
Attention! Users and owners of STV-LC50ST910FL TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that may lead to complete non-repairability of the device.
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC50ST910FL V1N12, Main: CV9202H-CSM & R.RK3066TVP.A12, Panel: LC490DUJ-SGE1
The appearance of the MainBoard CV9202H-CSM is shown in the figure below:CV9202H-CSM
External view of the power supply
Main features of SUPRA STV-LC50ST910FL device:
Installed matrix (LED panel) LC490DUJ-SGE1.
Matrix control uses the Timing Controller (T-CON) 6870C-0481A.
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 SUPRA STV-LC50ST910FL TV is carried out by the AY089D-4SF power module, or its analogs.
MainBoard - the main board (motherboard) is a CV9202H-CSM module, using CPU chips: SPV9202, SPI Flash: 25Q64, AUDIO: TPA3110LD2 and others.
Tuner NoName provides reception of television programs and tuning to channels.
LED TV SUPRA STV-LC50ST910FL with LCD display LC490DUJ-SGE1, diagonal size 50 "(127 cm) 16: 9. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 150,000: 1 is achieved by special control operation of LEDs depending on the illumination of areas in the scene.The display technology of the model uses LED LED backlighting.Capabilities of the TV provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD).
STV-LC50ST910FL has built-in SMART software and pre-installed Android operating system. Internet connection can be made via Wi-Fi wireless connection. The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping takes place in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Supported media file formats: MP3, MPEG4, MKV, JPEG.
Speaker power of 16 W (2x8 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, VGA, HDMI x2, USB x3, Ethernet (RJ-45), Wi-Fi 802.11n. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080. The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: With stand 1235x758x284 mm, Without stand 713x435x86 mm.
Attention! The LC490DUJ-SGE1 panel of the SUPRA STV-LC50ST910FL LED TV is an expensive and unreliable element.
Do not allow any impacts 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.