Technical description and composition of the SUPRA STV-LC32T430WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC32T430WL
Chassis / Version: V1R08
Panel: C320X16-E9-B (G01)
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-LC32T430WL Specifications
SUPRA STV-LC32T430WL
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- TV SUPRA STV-LC32T430WL does not turn on and does not show any signs of turning on, does not respond to control buttons and to the remote control.
In such cases, the main power supply, the AC / DC converter of the mains voltage, which is combined with the MainBoard TP.MS3463T.PB751, may be faulty. Then we recommend measuring its output voltages and, if they are absent, check the serviceability of the power switches (TO-252) and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key is most often cut 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 and all other functions work. Sometimes, when turned on, the image appears and disappears for a second.
In such cases, the most likely malfunction of the LED panel backlighting elements. The reason can sometimes be in the power supply of the LEDs, but more often in their malfunction (breakdown or breakage), sometimes in the violation of the contact connections of the LED strips.
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. By opening the panel, you can check each LED separately. Typically, Chinese multimeters light up one 3-volt LED slightly if the probes are connected to it in the forward direction. 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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its SPI Flash GD25Q64C, Audio: TPA3110LD2 chips and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
Before changing the XF-3SDT-H tuner, if it is not possible to tune to TV channels, you should make sure that there are supply voltages, which must be measured at the corresponding tuner terminals and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be monitored with an oscilloscope
Attention to TV owners! Attempts to repair SUPRA STV-LC32T430WL yourself are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32T430WL V1R08, Main: TP.MS3463T.PB751, Panel: C320X16-E9-B (G01)
The appearance of MainBoard TP.MS3463T.PB751 is shown in the figure below:TP.MS3463T.PB751
Main features of SUPRA STV-LC32T430WL device:
Installed matrix (LED panel) C320X16-E9-B (G01).
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-LC32T430WL with LCD C320X16-E9-B, 32 "(81 cm) 16: 9 format diagonal. The required screen brightness of 250 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 80,000: 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, component, VGA, HDMI x3, USB. 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-E9-B (G01) SUPRA STV-LC32T430WL 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 unrepairable ................................ .........................................