Technical description and composition of the TV SUPRA STV-LC22T880FL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC22T880FL
Chassis / Version: CV512L-B24 V1P11
Panel: LC215DTBA
LED driver (backlight): integrated into MainBoard
PWM LED driver: BIT3267
MOSFET LED driver: D4454
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: CV512L-B24
IC MainBoard: SPI FLESH: 25Q64C, Sound: YD1517P
Tuner: DMI21-C5I2RH
Technical Specifications STV-LC22T880FL
SUPRA STV-LC22T880FL
General repair guidelines for TV LCD LED
Possible malfunctions
- The SUPRA STV-LC22T880FL TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
In this case, first of all, you should check the operability of the main power source - AC / DC network voltage converter, all of whose elements are located on the MainBoard CV512L-B24 board. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
For any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM SOT23-6 PWM chips are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It should be remembered that it is not possible to determine the break 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. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEds are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a malfunction, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the CV512L-B24 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Board repair and chip replacement SPI FLESH: 25Q64C, Sound: YD1517P are made with the necessary equipment, and the corresponding hardware base. Malfunctions associated with the application of the soldering technology of the BGA processor can be localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner DMI21-C5I2RH may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention TV owners! Self-repair attempts by SUPRA STV-LC22T880FL are not recommended by the manufacturer and can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC22T880FL, Main: CV512L-B24, Panel: LC215DTBA
The appearance of the MainBoard CV512L-B24 is shown in the figure below:CV512L-B24
CV512L-B24 can be used in TVs:
BBK 28LEM-1021/T2C (Panel SV275SHD HX010403 X41), BBK 22LEM-1026/FT2C (Panel M215HGE-P02), SUPRA STV-LC24T880WL (Panel HV236WHB-N00), SUPRA STV-LC22T880FL (Panel LC215DTBA).
Main features of the SUPRA STV-LC22T880FL device:
Installed matrix (LED-panel) LC215DTBA.
To power the backlight LEDs, a converter is used, combined with the main board CV512L-B24, controlled by the BIT3267 PWM controller. As power elements of the LED driver, keys of the D4454 type are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is a CV512L-B24 module, using microchips SPI FLESH: 25Q64C, Sound: YD1517P and others.
The DMI21-C5I2RH tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: PANDA
Model: LC215DTBA
Type: a-Si TFT-LCD, CELL
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare, Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 5.6% (with Polarizer)
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV SUPRA STV-LC22T880FL with LCD display LC215DTBA, diagonal size 22 "(56 cm) 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 depending on the illuminated areas in the plot. The model’s display manufacturing technology uses LED LED backlighting. The TV’s capabilities include viewing broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution according to the 1080p standard (Full HD). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV, 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, component, SCART, VGA, HDMI, USB x2. 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, 1280x1024, 1360x768, 1920x1080. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: With stand 1235x758x284 mm, Without stand 713x435x86 mm.
Attention! The LC215DTBA panel of a SUPRA STV-LC22T880FL 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.