Technical description and composition of the SUPRA STV-LC50T400FL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC50T400FL
Chassis / Version: HK-T.SP9202V51
Panel: T500HVN07.1 XL
T-CON: 42T34-C01
LED driver (backlight): integrated into PSU
Power Supply (PSU): SHG4202A-191S // AY156D-4SF
MainBoard: HK-T.SP9202V51
IC MainBoard: Flash GD25Q32
STV-LC50T400FL Specifications
SUPRA STV-LC50T400FL
General recommendations for TV LCD LED repair
Possible manifestations of defects
- SUPRA STV-LC50T400FT TV does not turn on and does not show any signs of turning on. There is no reaction to the control buttons and to the remote control.
In such cases, the SHG4202A-191S power supply usually fails. It is necessary to measure the secondary output supply voltages, and if they are absent, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short-circuit mode, and in case of a short circuit in the elements of the primary circuit, the mains fuse is usually cut off.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, supply, frequency setting, damper ... as well as elements of Negative Feedback of stabilization. The PWM microcircuit (PWM) can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no picture, there is sound, it reacts to the remote control, the channels are switched. In some cases, the image appears when turned on and disappears immediately.
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlighting. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 HK-T.SP9202V51 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing Flash GD25Q32 elements requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the warm-up method.
Attention! Users and owners of STV-LC50T400FT TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from trying 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-LC50T400FL, Main: HK-T.SP9202V51, Panel: T500HVN07.1
The appearance of the MainBoard HK-T.SP9202V51 is shown in the figure below:HK-T.SP9202V51
HK-T.SP9202V51 can be used in TVs:
SUPRA STV-LC48T400FL (Panel MT4761B01-1 XL2), SUPRA STV-LC50T400FL (Panel T500HVN07.1 XL).
External view of the power supply
Main features of SUPRA STV-LC50T400FL device:
Installed matrix (LED panel) T500HVN07.1 XL.
Matrix control uses Timing Controller (T-CON) 42T34-C01.
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-LC50T400FL TV is carried out by the SHG4202A-191S power module, or its analogs.
MainBoard - the main board (motherboard) is a HK-T.SP9202V51 module, using Flash GD25Q32 chips and others.
SUPRA LED TV STV-LC50T400FL with LCD T500HVN07.1, 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.This model uses an LED-panel with an edge arrangement of backlighting LEDs - Edge LED.The TV capabilities provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution in the standard 1080p (Full HD ) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. 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.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, VGA, HDMI x3, USB. 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 1148x733x260 mm, Without stand 1148x684x98 mm.
TV weight: 16 kg.
Attention! SUPRA STV-LC50T400FL LED TV panel T500HVN07.1 XL 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.