Technical description and composition of the SUPRA STV-LC3225WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC3225WL
Chassis / Version: V5L07
Panel: TC315B601
LED driver (backlight): integrated into PSU
PWM LED driver: BIT3251
MOSFET LED driver: AOD478, AOD452A
Power Supply (PSU): MP123T -24TI
PWM Power: LD7550
MainBoard: T.MS6M48.7A
IC MainBoard: TPA3110LD2 25Q32BVS
Tuner: CDT-3SP51I2-37
STV-LC3225WL Specifications
SUPRA STV-LC3225WL
General recommendations for TV LCD LED repair
It is advisable to start repairing a SUPRA STV-LC3225WL dblack TV with a careful external inspection of both internal and external elements. In some cases, visible external damage to elements can suggest directions for troubleshooting and localizing a defect even before the necessary measurements are taken at the control points of electronic circuit assemblies. Swollen electrolytic or sintered capacitors, charred resistors, ring cracks in the soldering of the element terminals - all this can significantly help the master to determine the causes and consequences of the malfunctions in the TV.
If SUPRA STV-LC3225WL does not turn on, none of the control lamps on the front panel will light up or blink, therefore, there is a very high probability of malfunction of the MP123T-24TI power supply module. In some cases, only the processor power supply regulator may be faulty. The first step is to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse in the power supply is broken, in most cases a breakdown of the power switch (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. You should also check the diodes of the rectifier bridge and the electrolytic capacitor of the mains rectifier filter.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (SMPS) it does not fail by itself without reasons that should be looked for by checking other elements of the primary circuit - electrolytic capacitors, PWM controller LD7550R BIT3251 led drive, which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the SUPRA STV-LC3225WL TV does not have a picture, but there is sound, a malfunction is likely in the LED backlight circuits of the TC315B601 panel. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overestimated ESR.
To check the health of the LEDs, as well as the contact connections in the ruler circuit, the panel must be disassembled.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
When repairing the MB board, you need to check its components TPA3110LD2 25Q32BVS. Defective elements must be replaced. If BGA chips are installed, their failure is usually localized by warming up. If chips with BGA soldering technology are used, the problem in its implementation is detected by local heating of the chip.
The malfunction of the CDT-3SP51I2-37 tuner is established after checking the software and all supply voltages at its terminals, including the supply voltage of the varicaps (30-33V).
Remember! Attempts to self-repair the SUPRA STV-LC3225WL TV by users without appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA LC3225WL, Main MS6M48.7A 10423, Panel TC315B506
photo ------------ foto MP123T-24TL
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> MP123T-24TL Schematic
In cases where there was a failure in the SPI FLASH software produced by Winbond, we recommend replacing the microcircuit with a new one. Often faulty Winbond microcircuits can temporarily restore their operability after temperature exposure, for example, when a soldering station is heated by a hairdryer. Sometimes this is enough to read the standard software content.Additional MainBoard Repair
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).
External view of the power supply
Main features of SUPRA STV-LC3225WL device:
Installed matrix (LED panel) TC315B601.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by the BIT3251 PWM controller. The keys of the type AOD478, AOD452A are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC3225WL TV is carried out by the MP123T power supply module, or its analogs using LD7550 microcircuits.
MainBoard - the main board (motherboard) is a T.MS6M48.7A module, using TPA3110LD2 25Q32BVS chips and others.
The CDT-3SP51I2-37 tuner provides reception of television programs and tuning to channels.
LED TV SUPRA STV-LC3225WL with LCD TC315B601, 32 "(81 cm) in 16: 9 format. The required screen brightness of 450 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum brightness to minimum is 3000: 1. Dynamic contrast ratio of 10000: 1 is achieved by special control of the LEDs depending on the illumination of areas in the scene.This model uses an LED panel with an edge LED backlighting - Edge LED.It is possible to view programs and films and images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported formats multimedia files: MP3, WMA, MPEG4, JPEG.
The power of the acoustic system of sound 30 W (2x15 W) is provided by two speakers. Uses NICAM stereo signal processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, component, SCART x2, RGB, VGA, HDMI x3, USB. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
The power consumed by the TV in operating mode from the network is 120 watts.
Overall dimensions: 870x630x280 mm.
TV weight: 14.3 kg.
Attention! SUPRA STV-LC3225WL LED TV panel TC315B601 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.