Technical description and composition of the SUPRA STV-LC40LT0011F TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC40LT0011F
Chassis / Version: V3T09
Panel: C400F18-E60-S
T-CON: 40GF11BMB7S4LV0.1
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: TO-252
MainBoard: JUC7.820.00205281
IC MainBoard: CPU: MSD3663LSA-005N, SPI FLASH: 25Q64CSIG
Tuner: DVB + SAT
STV-LC40LT0011F Specifications
SUPRA STV-LC40LT0011F
General recommendations for TV LCD LED repair
Possible malfunctions
- TV SUPRA STV-LC40LT0011F does not turn on and does not give any signs of turning on, does not respond to control buttons and to the remote control.
A malfunction in such cases, first of all, should be sought in the power elements of a switching power supply (SMPS) - a mains voltage converter (AC / DC), which in this TV model is combined with the MainBoard JUC7.820.00205281 main board. Its output voltages should be measured and, if they are absent, the serviceability of the power switches (TO-252) and rectifier diodes in the converters should be checked for possible breakdown.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and, less often, the current sensor in the source of the key.
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 image, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlighting. The reason may be in the breakage of the LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the strings connectors,
It is impossible to check the LED bars for a break without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to light a single 3V LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off, or pierced in the K / Z.
- The indicator blinks or is on constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the JUC7.820.00205281 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). When repairing an MB board, you need to check its components CPU: MSD3663LSA-005N, SPI FLASH: GD25Q64B. Defective elements must be replaced. If chips with BGA soldering technology are used, the problem in its implementation is detected by local heating of the chip.
Malfunction of the DVB + SAT tuner 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.
We remind users again! Attempts to repair the SUPRA STV-LC40LT0011F TV on your own without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC40LT0011F V3T09, Main: JUC7.820.00205281, Panel: C400F18-E60-S
Main features of SUPRA STV-LC40LT0011F device:Installed matrix (LED panel) C400F18-E60-S.
The matrix control uses the 40GF11BMB7S4LV0.1 Timing Controller (T-CON).
To power the backlight LEDs, a converter combined with the JUC7.820.00205281 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 TO-252 power switches.
MainBoard - the main board (motherboard) is a JUC7.820.00205281 module, using CPU chips: MSD3663LSA-005N, SPI FLASH: 25Q64CSIG and others.
The DVB + SAT tuner provides reception of television programs and tuning to channels.
SUPRA LED TV STV-LC40LT0011F with LCD C400F18-E60-S, diagonal size 40 "(102 cm) 16: 9. The required brightness of the screen of 280 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 120,000: 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. The TV's capabilities provide for viewing broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). Supported formats multimedia files: MP3, WMA, MPEG4, DivX, MKV, JPEG.
Speaker power 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, 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.
Overall dimensions: 1005x625x160 mm.
Attention! Panel C400F18-E60-S SUPRA LED TV STV-LC40LT0011F 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.