Technical description and composition of the SUPRA STV-LC32LT0060F TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC32LT0060F
Chassis / Version: V1S11
Panel: KM32F-SX-01
T-CON: 17Y_HF11_PCMMC2LV0.1
LED driver (backlight): integrated into MainBoard
PWM LED driver: SOT23-6
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: 70R900P
MainBoard: JUC7.820.00188290
IC MainBoard: SPI Flash: GD24Q64
Tuner: ST18WM-2K-E
STV-LC32LT0060F Specifications
SUPRA STV-LC32LT0060F
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- SUPRA STV-LC32LT0060F does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
In this case, the main Switching Power Supply, the AC / DC mains voltage converter, whose elements are located on the MainBoard JUC7.820.00188290 main board, may be faulty. It is necessary to measure its output supply voltages, and in their absence, check the serviceability of the power switches (70R900P) of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
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 in the event of 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 and reaction to commands from the remote control. Or the image appears immediately after switching on and disappears.
Often in such cases there is no backlighting of the LED panel. Often the cause of a malfunction is the lack of current in the LED circuit, for example, their open or short circuit, or a violation of the contact connections of the connectors.
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.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the JUC7.820.00188290 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). Repair of the board and replacement of SPI Flash: GD24Q64 microcircuits are made if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by warming up.
In cases where there is no tuning for terrestrial or cable TV channels, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the ST18WM-2K-E tuner outputs. It is also necessary to check with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.
Attention to users! Self-repair of the SUPRA STV-LC32LT0060F TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32LT0060F V1S11, Main: JUC7.820.00188290, Panel: KM32F-SX-01
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ----------> MainBoard JUC7.820.00188290
The appearance of the MainBoard JUC7.820.00188290 is shown in the figure below:JUC7.820.00188290
Main features of SUPRA STV-LC32LT0060F device:
Installed matrix (LED panel) KM32F-SX-01.
Matrix control uses Timing Controller (T-CON) 17Y_HF11_PCMMC2LV0.1.
To power the backlight LEDs, a converter combined with the JUC7.820.00188290 main board is used, controlled by the SOT23-6 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 PWM SOT23-6 microcircuits and 70R900P power switches.
MainBoard - the main board (motherboard) is a JUC7.820.00188290 module, using SPI Flash chips: GD24Q64 and others.
The ST18WM-2K-E tuner provides reception of television programs and tuning to channels.
SUPRA LED TV STV-LC32LT0060F with LCD KM32F-SX-01, 32 "(81 cm) 16: 9 diagonal. The required screen brightness of 260 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 100,000: 1 is achieved special control of the LEDs depending on the illumination of the areas in the scene.The LED-panel uses direct pixel backlighting with the rear-positioned LEDs - Direct LED. Full HD) Supported media file formats: MP3, MPEG4, MKV, JPEG.
Speaker power 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, VGA, HDMI x3, USB. A headphone output is provided. The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV in operating mode from the network is 60 watts.
Dimensions: with stand 735x465x210 mm, without stand 735x410x79 mm.
TV weight: with stand: 4.3 kg, without stand: 4.2 kg.
Attention! Panel KM32F-SX-01 SUPRA LED TV STV-LC32LT0060F 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.