Technical description and composition of the SUPRA STV-LC3285FL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC3285FL
Chassis / Version: V1J12
Panel: CLAA315FAH03
MainBoard: 5800-A8M890-0020
IC MainBoard: SPI FLASH: EN25B64
Tuner: DTT-10B1C / GW12B5CU
Control: Login to service: SOURCE 2580
STV-LC3285FL Specifications
SUPRA STV-LC3285FL
General recommendations for TV LCD LED repair
It is advisable to start repairing a SUPRA STV-LC3285FL TV with a careful external examination of both internal and external elements. Many visible changes in the state of elements make it possible to determine the further direction of troubleshooting and localization of the defect. If ring cracks are found in the soldering of the terminals of the elements or broken connecting tracks, swollen capacitors or charred resistors - all this may be characteristic signs of the causes or consequences of an already known typical malfunction.
In the absence of any signs of operability, when the SUPRA STV-LC3285FL does not turn on and does not signal anything with the control 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 general, first of all, it is necessary to check the electrolytic capacitors of the filters of the secondary rectifiers and the fuse at the mains input. If it is cut off, then the diodes of the rectifier bridge and the key transistor of the converter, which can be located either on a separate heatsink or integrated with a PWM controller into a common microcircuit, should be checked for a breakdown of PN junctions. Options are possible.
It should be borne in mind that in the practice of repair, it is extremely rare for key transistors in switching power supplies (SMPS) to fail without reasons that should be looked for by checking other components, for example, a key breakdown can provoke faulty elements of damper circuits, or dried electrolytic capacitors or broken primary resistors power supply circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM regulator microcircuit are subject to verification, which it is desirable to check by replacement.
Sometimes the SUPRA STV-LC3285FL TV does not have a picture, but there is sound, or the picture appears and disappears immediately. In this case, there is a high probability of malfunction of the CLAA315FAH03 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).
In most cases when there is no backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or more LEDs do not work in one line, therefore, they are punctured and should be replaced.
It should be remembered that it is not possible to determine an open circuit in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
If the 5800-A8M890-0020 motherboard is faulty, first of all it is necessary to check all linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes it is possible to check the health of the MB only by replacing it.
Often the MB (SSB) board needs to be replaced in case of complex malfunctions that are difficult to detect. When attempting to repair, you should check its elements - SPI FLASH: EN25B64 and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
Before replacing the DTT-10B1C / GW12B5CU tuner, if there is no tuning to the channels, you must first check the supply voltage at its terminals, including the supply of varicaps (30-33V).
Attention to users! Self-repair of the SUPRA STV-LC3285FL TV without appropriate qualifications and experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC3285FL (V1J12), Main 5800-A8M890-0020, Panel: CLAA315FAH03
The appearance of the MainBoard 5800-A8M890-0020 is shown in the figure below:5800-A8M890-0020
Main features of SUPRA STV-LC3285FL device:
The matrix (LED panel) CLAA315FAH03 is installed.
The required supply voltages for all nodes of the SUPRA STV-LC3285FL TV are provided by a switching power supply.
MainBoard - the main board (motherboard) is a 5800-A8M890-0020 module, using SPI FLASH chips: EN25B64 and others.
The DTT-10B1C / GW12B5CU tuner provides reception of television programs and tuning to channels.
SUPRA LED TV STV-LC3285FL with LCD CLAA315FAH03, diagonal size 32 "(81 cm) 16: 9. The required screen brightness of 450 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum brightness to minimum is 6000: 1. Dynamic contrast ratio of 24000: 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 power 10 W (2x5 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 x3, component, SCART, VGA, HDMI x3, USB. 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. The digital tuner is capable of receiving TV channels in DVB-T standards.
The power consumed by the TV in operating mode from the network is 80 watts.
Overall dimensions: 848x648x242 mm.
TV weight: 12.8 kg.
Attention! Panel CLAA315FAH03 LED TV SUPRA STV-LC3285FL 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.