Technical description and composition of the TV SUPRA STV-LC22T550FL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC22T550FL
Chassis / Version: TP.MS3463S.PA63
Panel: T215HVN01
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN51DP
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: TP.MS3463S.PA63
IC MainBoard: SPI FLASH: GD25Q64
Tuner: XF-3SDT-H
Technical Specifications STV-LC22T550FL
SUPRA STV-LC22T550FL
General repair guidelines for TV LCD LED
Possible malfunctions
- The SUPRA STV-LC22T550FL TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
The malfunction in such cases should be sought in the elements of the power source - mains voltage converter (AC / DC), which is located on the MainBoard TP.MS3463S.PA63 main board. It is necessary to measure its output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the mains fuse and, less often, the current sensor at the source of the key are most often cut off.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) PWM SOT23-6, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
Often in such cases, there is no LED backlight. 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.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can test each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the TP.MS3463S.PA63 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the SPI FLASH elements: GD25Q64. BGA chip malfunctions are usually easy to detect by warming up.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the XF-3SDT-H tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Once again, remind users! Attempts to self-repair a TV SUPRA STV-LC22T550FL without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC22T550FL, Main: TP.MS3463S.PA63, Panel: T215HVN01
The appearance of MainBoard TP.MS3463S.PA63 is shown in the figure below:TP.MS3463S.PA63
TP.MS3463S.PA63 can be used in TVs:
ERISSON 22LES76T2 (Panel ST2151B01-1-XC-3), SUPRA STV-LC19T550WL (Panel HM185WX3-401), SUPRA STV-LC22T550FL (Panel T215HVN01).
Main features of the SUPRA STV-LC22T550FL device:
The matrix (LED panel) T215HVN01 is installed.
To power the backlight LEDs, a converter is used, combined with the TP.MS3463S.PA63 main board, controlled by the SN51DP PWM controller.
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 TP.MS3463S.PA63 module, using SPI FLASH chips: GD25Q64 and others.
The XF-3SDT-H tuner allows you to receive television programs and tune to channels.
LED TV SUPRA STV-LC22T550FL with LCD T215HVN01, diagonal size 22 "(56 cm) 16: 9 format. The required brightness of the screen 220 cd / m² is provided by LED backlight LED. Dynamic contrast ratio 80000: 1 is achieved by special control of the LEDs depending on the illuminated areas in the plot, this model uses an LED panel with the end position of the backlight LEDs - Edge LED. The TV features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution according to the standard 1080p (Full HD). The input high-frequency or 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, 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, 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, 1280x1024, 1360x768, 1920x1080. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 565x370x120 mm.
Attention! The T215HVN01 panel of a SUPRA STV-LC22T550FL 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.