Technical description and composition of the SUPRA STV-LC4225FL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC4225FL
Chassis / Version: V1K08
Panel: TC420F115
LED backlight: Edge LED
LED driver (backlight): integrated into PSU
Power Supply (PSU): HTX-PI420402A 110611904560
MainBoard: T.MS6M48.7A
IC MainBoard: CPU: MST6E48RHS, SPI FLASH: 25Q32BVSIG, Audio: R2A15122FP
Tuner: ET-6T1E-LF-108W-A
STV-LC4225FL Specifications
SUPRA STV-LC4225FL
General recommendations for TV LCD LED repair
SUPRA STV-LC4225FL TV, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. It often happens that visible damage to elements or connections helps to determine the direction of troubleshooting. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred layer of paint on the resistors - all this for the repairman can be a significant clue in assumptions about the causes and consequences of a malfunction.
In the absence of any signs of operability, when SUPRA STV-LC4225FL 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. When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the secondary rectifier filter and check the fuse and, if it is broken, the cause must be identified. Often in such cases an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes and transistors in the primary circuit.
In most cases, breakdowns of keys in switching power supplies (SMPS) do not occur without reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as broken resistors or punctured semiconductor elements in the stabilization circuits. Possible defect of the PWM chip from the manufacturer.
Sometimes the SUPRA STV-LC4225FL TV has no picture, but there is sound, or the picture appears and disappears immediately. In this case, there is a high probability of malfunction of the TC420F115 panel backlight LED converter, or an open circuit in the LED circuit is possible. In such cases, first of all, it is necessary to make sure that all electrolytic capacitors of the filter are in good working order for the power supply of the LED driver itself, including the power supply unit (power supply unit).
To check the health of the LEDs, as well as the contact connections in the ruler circuit, the panel must be disassembled.
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.
On the CV182H-K motherboard, in the event of a malfunction, you should first check the operability of all stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Complex repair of MB (SSB) is possible only in a service center with the necessary equipment. Checking or replacing Flash W25Q32 elements requires the necessary training and professional skills to repair modules at the component level. Problems associated with BGA soldering technologies can be diagnosed by the warm-up method.
Once again, we remind TV users: do not attempt to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repairs only to professionals with sufficient experience in the field of electronic repair.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC4225FL V1K08, Main: T.MS6M48.7A, Panel: TC420F115
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC4225FL, Main: CV-182H-K, 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-LC4225FL 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-LC4225FL TV is carried out by the HTX-PI420402A power module, or its analogs.
MainBoard - the main board (motherboard) is a T.MS6M48.7A module, using CPU chips: MST6E48RHS, SPI FLASH: 25Q32BVSIG, Audio: R2A15122FP and others.
Tuner ET-6T1E-LF-108W-A provides reception of television programs and tuning to channels.
LED TV SUPRA STV-LC4225FL with LCD TC420F115, 42 "(107 cm) diagonal 16: 9. 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. The TV's capabilities provide viewing of programs 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 formation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. multimedia file formats: MP3, WMA, MPEG4, JPEG.
Speaker 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-LC4225FL 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.