Technical description and composition of the SUPRA STV-LC2625LD TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC2625LD
Chassis / Version: CV206H-C-11
Panel: V260B1-L31 Rev. 223 L0348
MainBoard: CV206H-C-11
IC MainBoard: EEPROM / FLASH: K24C32 / MX25L6405DMI-12G
Tuner: DT70WI-3R-E
STV-LC2625LD Specifications
SUPRA STV-LC2625LD
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-LC2625LD TV, as well as the external elements of the case. It often happens that visible damage to elements or connections helps determine the direction of troubleshooting. Elements with visible damage, for example, capacitors swollen after electrolyte boiling, charred resistors in certain nodes of the circuit, as well as ring cracks in the solders, will help the master to guess the causes and possible consequences of the malfunction.
In cases where the SUPRA STV-LC2625LD TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light or blink, and there are no sounds and no signs of operation when turned on, the power module is most likely faulty or there is no power processor on the motherboard (typical defect of some SUPRA TV models). Diagnostics and repair of the common power supply should always begin with checking the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the mains rectifier, as well as the large electrolytic capacitor of the mains rectifier filter.
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.
If SUPRA STV-LC2625LD has no image, but there is sound, the panel backlight LEDs V260B1-L31 Rev.223 L0348 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.
To check the health of the LEDs and contact connections in their power supply circuit, it is necessary to disassemble the panel.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
If the CV206H-C-11 motherboard is faulty, first of all, you need to check all the 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.
Complex repair of MB (SSB) is possible only in a service center with the necessary equipment. Checking or replacing EEPROM / FLASH elements: K24C32 / MX25L6405DMI-12G 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.
If there is no reception of TV channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the DT70WI-3R-E tuner.
Remember! Attempts to repair the SUPRA STV-LC2625LD TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC2625LD, Main: CV206H-C-11, Panel: V260B1-L31 Rev.223 L0348
The appearance of the MainBoard CV206H-C-11 is shown in the figure below:CV206H-C-11
CV206H-C-11 can be used in TVs:
SUPRA STV-LC3245LF (Panel 32 "), SUPRA STV-LC2625LD (Panel V260B1-L31 Rev.223 L0348), SUPRA STV-LC2625DL (Panel V260H1-L03), SUPRA STV-LC3225DL (Panel DTW015LSC02-A).
Main features of SUPRA STV-LC2625LD device:
Installed matrix (LED-panel) V260B1-L31 Rev.223 L0348.
The necessary supply voltages for all nodes of the SUPRA STV-LC2625LD TV are provided by a switching power supply.
MainBoard - the main board (motherboard) is a CV206H-C-11 module, using EEPROM / FLASH chips: K24C32 / MX25L6405DMI-12G and others.
The DT70WI-3R-E tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V260B1-L31
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
SUPRA LED TV STV-LC2625LD with LCD V260B1-L31, diagonal size 26 "(66 cm) 16: 9. The required screen brightness of 500 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum brightness to minimum brightness is 1000: 1. Dynamic contrast ratio 4000: 1 is achieved by special control of LED operation depending on the illumination of areas in the scene. The display technology of the model uses LED LED backlight. It is possible to view broadcasts, films and images in high quality HD at a resolution of 1366x768 pixels in the graphic standard 720p (HD Ready) input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC Graphic processing and digital signal shaping occurs in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards Supported media file formats: MP3 , MPEG4, JPEG.
Speaker power 16 W (2x8 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, audio x3, component, SCART x2, RGB, 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. The digital tuner is capable of receiving TV channels in DVB-T MPEG4 standards.
The power consumed by the TV in operating mode from the network is 60 watts.
Overall dimensions: 645x458x180 mm.
TV weight: 7.1 kg.
Attention! Panel V260B1-L31 Rev.223 L0348 SUPRA STV-LC2625LD LED TV 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.