Technical description and composition of the SUPRA STV-LC4225AFL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC4225AFL
Chassis / Version: T.MS6M48.7A
Panel: TC420F115
LED driver (backlight): integrated into PSU
Power Supply (PSU): BSF-P1420401A
MainBoard: T.MS6M48.7A
IC MainBoard: CPU: MST6E48RHS; SPI Flash W25Q32BV
Tuner: ET-6T1E-LF-108W-A
STV-LC4225AFL Specifications
SUPRA STV-LC4225AFL
General recommendations for TV LCD LED repair
Repair of electronic equipment usually begins with its external examination and diagnosis of a malfunction. In this case, you should inspect all the internal components of the SUPRA STV-LC4225AFL TV, as well as the external elements of the case. Visible damage to elements can sometimes indicate the direction of searching for a defect even before the necessary measurements are taken. In some cases, defective elements are visible with the naked eye, for example, charred resistors or swollen sintered capacitors, or electrolytic ones in rectifier filters. The formed ring cracks in the soldering of the terminals of transformers or heating circuit elements are also frequent sources of many malfunctions with a variety of external manifestations.
In the absence of any signs of operability, when SUPRA STV-LC4225AFL does not turn on and does not signal anything with indicator lamps on the panel, there is a possibility of a malfunction of the TV power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. In the absence of swollen capacitors of the secondary rectifier filter, diagnostics of the power supply should begin with checking the fuse and, if it breaks, it is necessary first of all to check all power semiconductor elements of the primary circuit - diodes and transistors for the likelihood of an avalanche or thermal breakdown.
Mos-Fet switches used in switching power supplies (SMPS) rarely fail without reasons that must be looked for by checking other circuit elements. Breakdown is often caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or breakdown of resistors in stabilization circuits. The PWM controller microcircuit can also cause the breakdown of the power switch of the converter.
If SUPRA STV-LC4225AFL has no image, but there is sound, the TC420F115 panel backlight LEDs or their power converter may be faulty. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are in good working order.
It is often necessary to disassemble the panel to check the health of the LEDs, as well as the contact connections in the connectors and solders.
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.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or microcircuit power converters and, if necessary, update the software (software).
Board repair and replacement of CPU chips: MST6E48RHS; SPI Flash W25Q32BV are produced with the necessary equipment and the corresponding element base. Malfunctions associated with the use of BGA soldering technologies can be localized by warming up.
Attention to users! Self-repair of the SUPRA STV-LC4225AFL TV without appropriate qualifications and experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC4225AFL, Main: T.MS6M48.7A, Panel: TC420F115
The appearance of the MainBoard T.MS6M48.7A is shown in the figure below:T.MS6M48.7A
T.MS6M48.7A can be used in TVs:
SUPRA STV-LC3244FL (Panel 1080p Full HD 1920x1080), SUPRA STV-LC2625WL (Panel TC260B306), SUPRA STV-LC3225WL (Panel TC315B601), SUPRA STV-LC2644WL (Panel T260XW06 V.4), SUPRA STV-LC4225AFL (Panel TC420F115), SUPRA STV-LC3225LF (Panel V315H4-LE2).
External view of the power supply
Main features of SUPRA STV-LC4225AFL device:
Installed matrix (LED panel) TC420F115.
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-LC4225AFL TV is carried out by the BSF-P1420401A power module, or its analogs.
MainBoard - the main board (motherboard) is a T.MS6M48.7A module, using CPU chips: MST6E48RHS; SPI Flash W25Q32BV and others.
Tuner ET-6T1E-LF-108W-A provides reception of television programs and tuning to channels.
SUPRA LED TV STV-LC4225AFL with LCD TC420F115, 42 "(107 cm) 16: 9 diagonal. The required screen brightness of 450 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum to minimum brightness is 3500: 1. Dynamic contrast ratio of 70,000: 1 is achieved by special control of the LEDs depending on the illumination of areas in the scene.This model uses an LED-panel with an edge LED backlighting - Edge LED. 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 formation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. multimedia file formats: MP3, WMA, MPEG4, JPEG.
Speaker sound system power 20 W (2x10 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 x2, audio x2, component, SCART, VGA, HDMI x3, USB. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768, 1920x1080.
The power consumed by the TV in operating mode from the network is 150 watts.
Overall dimensions: 1020x687x225 mm.
TV weight: 15.8 kg.
Attention! SUPRA STV-LC4225AFL LED TV panel TC420F115 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 non-repairable.