Technical description and composition of the TV SUPRA STV-LC24250WL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC24250WL
Chassis / Version: JUG7.820.1372 LSOD 2013-7-4
Panel: 720p HD, 1366x768
MainBoard: JUG7.820.1372 LSOD 2013-7-4
IC MainBoard: CPU TSUMV59XES-Z1, Flash 25Q32
Technical Specifications STV-LC24250WL
SUPRA STV-LC24250WL
General repair guidelines for TV LCD LED
Repair of the SUPRA STV-LC24250WL TV should begin with a fault diagnosis, which involves a careful inspection of the external and internal elements of the device. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the soldered terminals of transformers or heating elements are detected, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
In the case when the STV-LC24250WL does not turn on, does not respond to the remote control and buttons on the front panel, does not blink lights and does not show any signs of operability, the power supply module is probably defective in this case. If it is serviceable with such manifestations, it is necessary to check the power supply stabilizer (converter) of the processor on the motherboard. It is advisable to start the troubleshooting of the power supply module by checking the condition of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the binding of the PWM controller microcircuit are subject to verification, which it is desirable to verify by replacement.
If the SUPRA STV-LC24250WL TV does not have an image, but there is sound, there may be a malfunction in the LED backlight circuits of the 720p HD, 1366x768 panel. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
It is impossible to detect a break in the line of LEDs without disassembling the panel with a simple multimeter. LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes.
Repair or diagnostics of the motherboard JUG7.820.1372 LSOD 2013-7-4 should begin by checking the stabilizers or power converters of its microcircuits. If necessary, update the software (software).
Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU TSUMV59XES-Z1, Flash 25Q32 and replace failed chips with new ones. Some malfunctions can be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
Remember! Attempts to self-repair by users of the SUPRA STV-LC24250WL TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC24250WL, Main: JUG7.820.1372 LSOD 2013-7-4, Panel: 720p HD, 1366x768
The appearance of the MainBoard JUG7.820.1372 is shown in the figure below:JUG7.820.1372
Main features of the SUPRA STV-LC24250WL device:
Installed matrix (LED-panel) 720p HD, 1366x768.
The required supply voltage for all nodes of the TV SUPRA STV-LC24250WL provides a switching power supply.
MainBoard - the main board (motherboard) is a JUG7.820.1372 module, using CPU chips TSUMV59XES-Z1, Flash 25Q32 and others.
LED TV SUPRA STV-LC24250WL with LCD, diagonal size 23.6 "(60 cm) in 16: 9 format. The required brightness of the screen is 250 cd / m² LED backlight LED. Dynamic contrast ratio of 60,000: 1 is achieved by special control of the LEDs in This model uses an LED panel with an end-face illumination LED - Edge LED. You can watch broadcasts and movies and images in high quality HD at a resolution of 1366x768 pixels in the standard graphic decomposition 720p (HD Ready). Input high-frequency or the video signal is decoded in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, MPEG4, JPEG.
The power of the sound system 6 W (2x3 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, VGA, HDMI, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
Overall dimensions: With a support of 570x460x190 mm, Without a support of 570x400x45 mm.
Attention! The panel of a SUPRA STV-LC24250WL LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.