Technical description and composition of the SUPRA STV-LC42T410FL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC42T410FL
Chassis / Version: 35019753
Panel: V420HJ2-XR01 // V420HJ2-P01 REV.C1
LED backlight: KL42GT618 35017847 REV-00
T-CON: V420HJ2-XR01, V420HJ2-XC01 // V420HJ2-P01; CM2801B, CM501, CM601
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM
MainBoard: 35019753 // 35018086 REV-01
IC MainBoard: SPI Flash 25Q32
Control: IR: 32611 35016976
STV-LC42T410FL Specifications
SUPRA STV-LC42T410FL
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-LC42T410FL TV, as well as the external elements of the case. Visible damage to elements can sometimes indicate the direction of searching for a defect even before the necessary measurements are taken. If ring cracks are found in the soldering of the terminals of the elements or broken connecting tracks, swollen capacitors or charred resistors - all this may be characteristic signs of the causes or consequences of an already known typical malfunction.
In cases when the SUPRA STV-LC42T410FL TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operation when turned on, the power module is most likely faulty or power is missing processor on the motherboard (typical defect of some SUPRA TV models). When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the secondary rectifier filter and check the fuse and, if it is broken, the cause must be identified. Often in such cases an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes and transistors in the primary circuit.
Power switches in switching power supplies (SMPS) fail for no reason very rarely and, in case of their breakdown, it is necessary to look for a malfunction in the stabilization circuits, checking electrolytic capacitors, semiconductor devices and resistors in the primary circuit. The reason may be a malfunction of the PWM regulator microcircuit, which can only be checked by replacing it with a new or known good one.
If the SUPRA STV-LC42T410FL TV does not have a picture, but there is sound, a malfunction is likely in the LED backlight circuits of the V420HJ2-XR01 panel. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overestimated ESR.
It is often necessary to disassemble the panel to check the health of the LEDs, as well as the contact connections in the connectors and solders.
When diagnosing, it must be borne in mind that it is impossible to check for an open in the circuit of the LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally a current source.
The motherboard 35019753 must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or is on continuously. In such cases, if the converters or power regulators of the microcircuits are working, it may be necessary to update the software.
In some cases, it is necessary to check or replace (if necessary) elements of the MB (SSB) board - Flash 25Q32. In cases where a BGA processor is used, its malfunction is usually detected by the local warm-up method.
Attention to the owners! Attempts to repair the SUPRA STV-LC42T410FL TV yourself are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC42T410FL, Main: 35019753, Panel: V420HJ2-XR01
The appearance of MainBoard 35019753 is shown in the figure below:35019753
Main features of SUPRA STV-LC42T410FL device:
Installed matrix (LED-panel) V420HJ2-XR01 or V420HJ2-P01 REV.C1.
Matrix control uses Timing Controller (T-CON) V420HJ2-XR01.
A converter combined with the main board 35019753 is used to power the backlight LEDs.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using PWM microcircuits.
MainBoard - the main board (motherboard) is a 35019753 module, using SPI Flash 25Q32 chips and others.
SUPRA LED TV STV-LC42T410FL with LCD V420HJ2-XR01, 42 "(107 cm) 16: 9 diagonal. The required screen brightness of 380 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 100,000: 1 is achieved by special control operation of LEDs depending on the illumination of areas in the scene.This model uses an LED-panel with an edge arrangement of backlighting LEDs - Edge LED.The TV capabilities provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution in 1080p (Full HD ) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, MKV, JPEG.
Speaker power of 10 W (2x5 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 x2, component, VGA, HDMI x2, USB. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080. The digital tuner is capable of receiving television channels in DVB-T MPEG4, DVB-T2 standards.
Dimensions: With stand 736x496x180 mm, Without stand 736x444x75 mm.
Attention! SUPRA STV-LC42T410FL LED TV panel V420HJ2-XR01 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 unrepairable.