Technical description and composition of the SUPRA STV-LC3225LF TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC3225LF
Chassis / Version: T.MS6M48.7A 10423
Panel: V315H4-LE2
LED backlight: V315H4-LE2-TREF3, V315H4-LE2-TLEF3
LED driver (backlight): T87D106.00
MainBoard: T.MS6M48.7A 10423
IC MainBoard: SPI Flash: MX25L3206E, DRAM: NT5TV32M16CG-25C, A / V Svitch: CBT3257AD, Hdmi: IT6633E-P, Audio: R2A15122FP
Tuner: ET-6T1E-LF-108W-A
STV-LC3225LF Specifications
SUPRA STV-LC3225LF
General recommendations for TV LCD LED repair
Repair of the SUPRA STV-LC3225LF TV should begin with a careful external examination of all its constituent elements and modules. 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. Electrolytic capacitors of filters with a swollen case, as well as ring cracks formed in the soldering of the leads of heating elements or a layer of coal on burned out resistors sometimes prompt the repairman about the causes of the malfunction and the possible consequences.
If the power supply module fails, external manifestations may be different, for example, SUPRA STV-LC3225LF does not turn on at all and there is no indication of the control lamps on the front panel. With the same symptoms, the regulator (converter) of the control processor power supply may be faulty. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. If it breaks, the power elements of the transistors and diodes of the rectifier bridge should be checked for avalanche (thermal) breakdown.
It should be remembered that in the practice of repair, usually power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the reason that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dry electrolytic capacitors or broken resistors in the primary circuit, or the PWM controller microcircuit itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the SUPRA STV-LC3225LF TV has no picture, but there is sound, a malfunction is likely in the LED backlight circuits of the V315H4-LE2 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.
In most cases when there is no backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or more LEDs do not work in one line, therefore, they are punctured and should be replaced.
An open circuit in the LED rows connected in series cannot be detected with a multimeter or tester without disassembling the panel. It takes several tens of volts to open all the junctions, and it is best to use a current source for such purposes.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or microcircuit power converters and, if necessary, update 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 - Flash MX25L3206E 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.
Owners and users of the SUPRA STV-LC3225LF TV should remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that can lead to the complete non-repairability of the device!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC3225LF, Main: T.MS6M48.7A 10423, Panel: V315H4-LE2
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).
Main features of SUPRA STV-LC3225LF device:
Installed matrix (LED panel) V315H4-LE2.
The LED driver T87D106.00 is used to power the backlight LEDs.
The required supply voltages for all nodes of the SUPRA STV-LC3225LF TV are provided by a switching power supply.
MainBoard - the main board (motherboard) is a T.MS6M48.7A module, using SPI Flash chips: MX25L3206E, DRAM: NT5TV32M16CG-25C, A / V Svitch: CBT3257AD, Hdmi: IT6633E-P, Audio: R2A15122FP and others.
Tuner ET-6T1E-LF-108W-A provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V315H4-LE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920 (2) x1080 (2), FHD
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 697.92x392.58 mm
Surface: Antiglare (Haze 14%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
SUPRA LED TV STV-LC3225LF with LCD V315H4-LE2, 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 to minimum brightness is 4000: 1 Dynamic contrast ratio 12000: 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. resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal formation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Supported media file formats: MP3, MPEG4, JPEG.
The power of the acoustic system of sound 30 W (2x15 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, 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 digital tuner is capable of receiving TV channels in DVB-T MPEG4 standards.
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-LC3225LF LED TV panel V315H4-LE2 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.
