Technical description and composition of the SUPRA STV-LC32T700WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC32T700WL
Chassis / Version: V1R08
Panel: C320X16-E7-B (G01)
LED backlight: JL.D32061330-002KS-M
T-CON: HV320WHB-N81
LED driver (backlight): integrated into MainBoard
PWM LED driver: SO-8
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-252
MainBoard: TP.MS3463T.PB751
IC MainBoard: SPI Flash GD25Q64C, Audio: TPA3110LD2
Tuner: XF-3SDT-H
STV-LC32T700WL Specifications
SUPRA STV-LC32T700WL
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- SUPRA STV-LC32T700WL TV does not turn on. There are no signs of operability. The indicators on the front panel do not light up or blink, the TV does not respond to the control buttons.
In such cases, the AC / DC converter of the mains voltage, which is combined with the main board TP.MS3463T.PB751, is often faulty. Its output voltages should be measured, and if they are absent, check the serviceability of the power switches (TO-252) of the converters and rectifier diodes for the probability of a short circuit.
In the event of diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor in the source of the key usually breaks off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) PWM SOT23-6, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with a known good one.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
In such cases, the most likely malfunction of the LED panel backlighting elements. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and a voltage of several tens of volts is required to open their junctions. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Usually, Chinese multimeters lightly light up one 3-volt LED if you connect the probes to it in the forward direction (red probe to the anode, black to the cathode). For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or broken into the K / Z.
- The TV does not turn on, the indicator signals standby or operating mode, or blinks.
Repair or diagnostics of the TP.MS3463T.PB751 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Often the MB (SSB) board needs to be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SPI Flash GD25Q64C, Audio: TPA3110LD2 and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.The XF-3SDT-H tuner malfunction is established after checking the software and all supply voltages at its terminals. The I2C bus data exchange between the tuner and the processor can be monitored with an oscilloscope.
Owners of the STV-LC32T700WL TV are advised to contact only qualified specialists with the necessary experience for repair! Attempts to repair yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32T700WL V1R08, Main: TP.MS3463T.PB751, Panel: C320X16-E7-B (G01)
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32T700WL V1S05, Main: TP.MS3463T.PB751, Panel: C320X16-E7-B (G01)
The appearance of MainBoard TP.MS3463T.PB751 is shown in the figure below:TP.MS3463T.PB751
Main features of SUPRA STV-LC32T700WL device:
Installed matrix (LED panel) C320X16-E7-B (G01).
Matrix control uses the HV320WHB-N81 Timing Controller (T-CON).
To power the backlight LEDs, a converter combined with the TP.MS3463T.PB751 main board is used, controlled by the SO-8 PWM controller. TO-252 switches 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 SOT23-6 PWM microcircuits and TO-252 power switches.
MainBoard - the main board (motherboard) is a TP.MS3463T.PB751 module, using SPI Flash GD25Q64C chips, Audio: TPA3110LD2 and others.
Tuner XF-3SDT-H provides reception of television programs and tuning to channels.
SUPRA LED TV STV-LC32T700WL with LCD C320X16-E7-B, 32 "(81 cm) in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 80000: 1 is achieved special control of the LEDs depending on the illumination of areas in the scene. The display technology of the model uses LED LED backlight. It is possible to view programs and films and images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). Supported file formats multimedia: MP3, WMA, MPEG4, MKV, 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, audio x2, component, VGA, HDMI x2, USB x2. A headphone output is provided. The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: With stand 1235x758x284 mm, Without stand 713x435x86 mm.
Attention! Panel C320X16-E7-B (G01) SUPRA STV-LC32T700WL 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.
