Technical description and composition of the SUPRA STV-LC32T871WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC32T871WL
Chassis / Version: TP.SIS231.PT85
Panel: JHD315GH-E31
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: AOD4454
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM
MainBoard: TP.SIS231.PT85
IC MainBoard: CPU: SIS231, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2
STV-LC32T871WL Specifications
SUPRA STV-LC32T871WL
General recommendations for TV LCD LED repair
A malfunction of the power supply is often trite - the TV does not turn on, does not make any sounds, does not shine or blink with any indicators. 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.
The reasons for the breakdown of the power switch in switching power supplies (SMPS) can be different, for example, malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as failure of the PWM microcircuit of the PWM regulator or breaks of resistors in its strapping.
If SUPRA STV-LC32T871WL has no image, but there is sound, there may be a malfunction of the JHD315GH-E31 panel backlight LEDs or their power converter - LED driver.
To check the health of the LEDs and contact connections in their power supply circuit, it is necessary to disassemble the panel.
When trying to detect a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
Diagnostics and repair of the TP.SIS231.PT85 motherboard usually begins with checking the functionality of the stabilizers and power converters of the module chips. In some cases, a software update is required.
Complex repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the SPI Flash 25Q64 elements. Malfunctions in BGA chips are usually easy to detect by warm-up.
Attention to the owners! Attempts to repair the SUPRA STV-LC32T871WL TV by yourself are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL -------> Power supply Chassis TP.SIS231.PT85
The appearance of the MainBoard TP.SIS231.PT851 is shown in the figure below:TP.SIS231.PT851
TP.SIS231.PT85 can be used in TVs:
DNS M39DM8 (Panel V390HJ1-P02 Rev C1), DNS S32DC1 (Panel T320XVD01.0), DNS E32D18 (Panel ST3151A05-5 CX315DLEDM), DNS V32D8100S (Panel LSC320HN04-002), ERISSON 40LEP92 (Panel LSC400HN01 G01), ROLSEN RL-39S1502T2C (Panel V390BJ1-L01-D00), RUBIN RB-40D5FT2C (Panel 390HJ5-XCPE1), RUBIN RB-40SE9FT2C (Panel CX400DLEDM), SUPRA STV-LC32T871WL (Panel JHD315GH-E31), SUPRA STV-LC40T871FL (Panel JHD400GF), TELEFUNKEN TF-LED32S26T2 (Panel MT3151A05).
Main features of SUPRA STV-LC32T871WL device:
Installed matrix (LED panel) JHD315GH-E31.
The backlight LEDs are powered by a converter combined with the TP.SIS231.PT85 main board, controlled by the OB3350CP PWM controller. The keys of the AOD4454 type are used as power elements of the LED driver.
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 TP.SIS231.PT85 module, using CPU: SIS231, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2 and others.
SUPRA LED TV STV-LC32T871WL with LCD JHD315GH-E31, 32 "(81 cm) 16: 9. The required screen brightness of 300 cd / m² is provided by LED backlight. Dynamic contrast ratio of 90,000: 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.It is possible to view broadcasts and films and images in high quality HD at a resolution of 1366x768 pixels in the standard graphic resolution 720p (HD Ready) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal formation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV , JPEG.
Speaker power 12 W (2x6 W) is provided by two speakers. Uses NICAM stereo signal processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, RGB, VGA, HDMI x3, 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, 1360x768. The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 738x443x209 mm.
TV weight: 4.9 kg.
Attention! The panel JHD315GH-E31 of the SUPRA STV-LC32T871WL 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.