Sunday 12 July 2020

REPAIR / SERVICING TV SUPRA STV-LC24500FL

Technical description and composition of the TV SUPRA STV-LC24500FL, type of panel and applicable modules. The composition of the modules.
SUPRA LED
Model: STV-LC24500FL
Chassis / Version: T.VST59.11
Panel: 1080p Full HD, 1920x1080
MainBoard: T.VST59.11
IC MainBoard: CPU TSUMV59XE-Z1, Flash 25Q32BS
Technical Specifications STV-LC24500FL
SUPRA STV-LC24500FL
General repair guidelines for TV LCD LED
It is advisable to start repairing electronic devices, including the SUPRA STV-LC24500FL TV, with an external examination of its external and internal elements. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before starting the necessary measurements. Electrolytic capacitors of filters with a swollen body, as well as ring cracks or a layer of coal on burned-out resistors formed in the soldered terminals of the heating elements, sometimes tell the repairman the causes of the malfunction and possible consequences.
In cases when the SUPRA STV-LC24500FL TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely faulty or there is no power processor on the motherboard (a typical defect of some models of TVs SUPRA). It is advisable to start the troubleshooting of the power supply module by checking the state 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-LC24500FL does not have an image, but there is sound, the backlight LEDs of the 1080p Full HD panel, 1920x1080, or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
When trying to identify 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.
If the motherboard T.VST59.11 is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
When repairing an MB board, it is necessary to check its components CPU TSUMV59XE-Z1, Flash 25Q32BS. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
Owners and users of the SUPRA STV-LC24500FL TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!


FIRMWARE FOR SPI FLASH  ----------->   SUPRA STV-LC24500FL, Main: T.VST59.11, Panel: 1080p Full HD, 1920x1080

 The appearance of MainBoard T.VST59.11 is shown in the figure below:
T.VST59.11
It is advisable to start the repair of the T.VST59.11 motherboard, made on the basis of the TSUMV59Xxx multifunction processor, by checking the operability of the linear voltage stabilizers or converters necessary to provide power to the processor nodes - 1.2V core power, DDR 1.8V memory and Stand-by 3.3V mode . If there is no image, but if the display backlight is working properly, you should check the power supply voltage of the LCD panel 5V or 12V, depending on the type of panel used.
T.VST59.11 can be used on TVs:
SUPRA STV-LC19500WL (Panel HK185WLDEM-HH76H), FUSION FLTV-19L31B (Panel HK185WLEDM-HH75H), FUSION FLTV-22L31B (Panel LC215DT5A), SUPRA STV-LC24500FL (Panel 1080p Full HD 1920x1080), FUSION FLTV-24LF31B (Panel HK236WLEDM-BH56H).
Main features of the SUPRA STV-LC24500FL device:
Installed matrix (LED-panel) 1080p Full HD, 1920x1080.
The required supply voltage for all nodes of the TV SUPRA STV-LC24500FL provides a switching power supply.
MainBoard - the main board (motherboard) is a T.VST59.11 module, using CPU chips TSUMV59XE-Z1, Flash 25Q32BS and others.
LED TV SUPRA STV-LC24500FL with LCD, diagonal size 24 "(61 cm) 16: 9 format. The required brightness of the screen 250 cd / m² is provided by LED backlight LED. Dynamic contrast ratio of 60,000: 1 is achieved by special control of the LEDs in This model uses a LED panel with an end-face illumination LED - Edge LED. The TV features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution of 1080p (Full HD) standard. Input high-frequency or video signal is decoded in analog 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, MKV, JPEG.
The power of the acoustic system of sound 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, SCART, RGB, VGA, HDMI, USB. 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, 1920x1080.
The power consumed by the TV in the operating mode from the network is 40 watts.
Overall dimensions: With a support 562x394x160 mm, Without a support 562x347x74 mm.
Attention! The panel of a SUPRA STV-LC24500FL 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.