Technical description and composition of the SUPRA STV-LC3244FL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC3244FL
Chassis / Version: T.MS6M48.7A 10423
Panel: 1080p Full HD, 1920x1080
Power Supply (PSU): LK-OP412002B
PWM Power: L6599AD (PWM Resonant), L6562A (PFC), A6251M
MOSFET Power: KF5N50, K3683
MainBoard: T.MS6M48.7A 10423
IC MainBoard: CPU: MST6E48RHS; SPI Flash MX25L3206EM2I
Tuner: ET-6T1E-LF-108W-A
STV-LC3244FL Specifications
SUPRA STV-LC3244FL
General recommendations for TV LCD LED repair
Possible malfunctions
- SUPRA STV-LC3244FL TV does not turn on, does not respond to the remote control and control panel buttons, the indicators are off or flashing.
A malfunction in such cases should be looked for in the circuits of the LK-OP412002B power supply. It is necessary to measure its secondary output voltages, and if they are absent, check the serviceability of the power switches (KF5N50, K3683) of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse 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 supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch can be PWM (PWM) L6599AD (PWM Resonant), L6562A (PFC), A6251M. It is checked only by replacing it with a known good one.
- There is no picture, there is sound, it reacts to the remote control, the channels are switched. In some cases, the image appears when turned on and disappears immediately.
Usually, in such cases, a malfunction is detected in the nodes of the backlight of the LED panel. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as 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 T.MS6M48.7A motherboard should begin with checking the stabilizers and power converters required 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 - CPU: MST6E48RHS; SPI Flash MX25L3206EM2I 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.
Before replacing the ET-6T1E-LF-108W-A tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its outputs. You also need to make sure that the tuner and processor can exchange data via the I2C bus
Remember! Attempts to self-repair the SUPRA STV-LC3244FL TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC3244FL, Main: T.MS6M48.7A 10423 , Panel: 1080p Full HD, 1920x1080
The appearance of the MainBoard T.MS6M48.7A is shown in the figure below:T.MS6M48.7A
T.MS6M48.7A can be used in TVs:
SUPRA STV-LC3244FL (Panel 1080p Full HD 1920x1080), SUPRA STV-LC2625WL (Panel TC260B306), SUPRA STV-LC3225WL (Panel TC315B601), SUPRA STV-LC2644WL (Panel T260XW06 V.4), SUPRA STV-LC4225AFL (Panel TC420F115), SUPRA STV-LC3225LF (Panel V315H4-LE2).
Additionally by PSU
According to the conditions of compliance with modern world standards for household switching power supplies, the LK-OP412002B module provides for the use of a Power Factor Correction unit. The PFC is a step-up flyback converter based on the L6562A PWM controller. The reactive resistance of the electrolytic capacitor of the mains filter at a frequency of 50-60 Hz is usually no more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering is applied.
As a result of the work of the PFC conversion, the increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, at the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the health of the PFC unit.
External view of the power supply
Main features of SUPRA STV-LC3244FL device:
Installed matrix (LED panel) 1080p Full HD, 1920x1080.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC3244FL TV is carried out by the LK-OP412002B power module, or its analogs using L6599AD (PWM Resonant), L6562A (PFC), A6251M chips and power switches of the KF5N50, K3683 type.
MainBoard - the main board (motherboard) is a T.MS6M48.7A module, using CPU chips: MST6E48RHS; SPI Flash MX25L3206EM2I and others.
Tuner ET-6T1E-LF-108W-A provides reception of television programs and tuning to channels.
LED TV SUPRA STV-LC3244FL with LCD display, diagonal size 32 "(81 cm) in 16: 9 format. The required brightness of the screen of 400 cd / m2 is provided by LED backlighting. Dynamic contrast ratio of 60,000: 1 is achieved by special control of the LEDs in depending on the illumination of the areas in the scene.This model uses an LED-panel with an edge arrangement of backlighting LEDs - Edge LED.Possibilities of the TV provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, Xvid, JPEG ...
The power of the speaker system is 18 W (2x9 W), 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 x2, audio x2, component, SCART, RGB, VGA, HDMI x3, USB. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768.
The power consumed by the TV in operating mode from the network is 90 watts.
Overall dimensions: 779x592x205 mm.
TV weight: 9.5 kg.
Attention! SUPRA STV-LC3244FL LED TV panel 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.