Technical description and composition of the SUPRA STV-LC32T500WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC32T500WL
Chassis / Version: TP.SIS231.PT71
Panel: LC320TU3A
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
MainBoard: TP.SIS231.PT71
IC MainBoard: Flash 25Q64
STV-LC32T500WL Specifications
SUPRA STV-LC32T500WL
General recommendations for TV LCD LED repair
Repair of the SUPRA STV-LC32T500WL TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. According to some external signs of a change in the state of some elements, sometimes it becomes possible to make assumptions about the nature of the defect, as well as to determine the further direction of troubleshooting. Experienced repairers often guess about the causes of the defect and the possible consequences, for example, by ring cracks in the soldering of the element terminals, as well as by swollen capacitors or resistors burnt out to coal dust and other external indirect signs.
In the case when the STV-LC32T500WL does not turn on, does not respond to the remote control and front panel buttons, does not blink lights and does not show any signs of operability, the power module is probably faulty in this case. If it is working properly with such manifestations, it is necessary to check the processor power regulator (converter) on the motherboard. Diagnostics and repair of the common power supply should always begin with checking the mains fuse and the state 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.
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, when turning on the TV, the image appears and immediately disappears, or is absent initially when turned on, but there is sound and other functions work, there is a high probability of a malfunction of the LED driver (the power converter for the LED backlight of the LC320TU3A panel). In such cases, the common power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
A malfunction in the backlight circuits often occurs due to an open circuit in the power supply circuit of the LED lines. It is required to disassemble the panel and check the LEDs themselves, the ration of their outputs, as well as the reliability of the connections in the connectors and the ration of the connector pins.
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.
Repair or diagnostics of the TP.SIS231.PT71 motherboard should begin with checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
In some cases, to repair the MB (SSB) board, it may be necessary to replace the Flash 25Q64 chips with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
Attention to the owners! Attempts to repair the SUPRA STV-LC32T500WL TV yourself are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32T500WL, Main: TP.SIS231.PT71, Panel: LC320TU3A
The appearance of the MainBoard TP.SIS231.PT71 is shown in the figure below:TP.SIS231.PT71
TP.SIS231.PT71 can be used in TVs:
Haier LE40B7000C (Panel V390HJ1-PE1), HAIER LE39B7000C (Panel T390XVN01.0 ), SUPRA STV-LC32T500WL (Panel LC320TU3A), SUPRA STV-LC40T900WL (Panel 720p HD 1366x768).
Main features of SUPRA STV-LC32T500WL device:
The matrix (LED-panel) LC320TU3A is installed.
To power the backlight LEDs, a converter combined with the TP.SIS231.PT71 main board is used.
The power module is combined with the MainBoard and is made according to the AC / DC flyback converter circuit.
MainBoard - the main board (motherboard) is a TP.SIS231.PT71 module, using Flash 25Q64 chips and others.
Additional technical information about the panel:
Brand: PANDA
Model: LC320TU3A
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: UV2A, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare, Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.9% (with Polarizer)
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 7 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
SUPRA LED TV STV-LC32T500WL with LCD LC320TU3A, 32 "(81 cm) 16: 9. depending on the illumination of the areas in the scene.This model uses an LED-panel with an edge arrangement of backlighting LEDs - Edge LED.It is possible to view broadcasts, films and images in high quality HD at a resolution of 1366x768 pixels in the standard graphic resolution 720p (HD Ready). 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. Supported multimedia file formats: MP3, MPEG4, JPEG.
Speaker power of 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, component, SCART, VGA, HDMI x3, USB x2. 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, 1360x768. The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: With stand 736x497x180 mm, Without stand 736x444x76 mm.
Attention! The LC320TU3A panel of the SUPRA STV-LC32T500WL 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.