Technical description and composition of the SUPRA STV-LC3244WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC3244WL
Chassis / Version: T.MS6M182.81B 11224
Panel: LTA320AN01
MainBoard: T.MS6M182.81B 11224,
IC MainBoard: MST6E182VS-LF-21, 25Q32, NT5TU32M16DG-AC
STV-LC3244WL Specifications
SUPRA STV-LC3244WL
General recommendations for TV LCD LED repair
Repair and diagnostics of any electronic device, in particular SUPRA STV-LC3244WL, it is advisable to begin with a careful external examination of the internal and external elements. It often happens that visible damage to elements or connections helps determine the direction of troubleshooting. Elements with visible damage, for example, capacitors swollen after electrolyte boiling, charred resistors in certain nodes of the circuit, as well as ring cracks in the solders, will help the master to guess the causes and possible consequences of the malfunction.
In the case when the STV-LC3244WL does not turn on, does not respond to the remote control and front panel buttons, does not blink lights and does not show any signs of operability, the power module is probably faulty in this case. If it is working properly with such manifestations, it is necessary to check the processor power regulator (converter) on the motherboard. When repairing a power supply, it is advisable to start diagnostics with checking the mains fuse and electrolytic capacitors of the filters of the converter's secondary rectifiers. In the event of a break in the fuse, the cause should be sought in the power semiconductor elements of the pulse converter of the main power supply unit. It is necessary first of all to check the diodes of the rectifier bridge of the mains voltage and the power switch (s) of the converter.
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, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If SUPRA STV-LC3244WL has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the LED circuit of the LTA320AN01 panel backlight or their power converter - LED driver. Sometimes, when turned on, the image appears and immediately disappears. In such cases, it is necessary to check the electrolytic capacitors of the power supply filter of the LED driver itself, including in the secondary rectifier of the main power supply unit.
Often, in the absence of backlighting, disassembly of the panel is required. It is necessary to check the serviceability of the LED transitions, as well as the reliability of the contact connections in the lines and connectors.
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.
If the motherboard T.MS6M182.81B 11224 is faulty, first of all, it is necessary to check all linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes it is possible to check the health of the MB only by replacing it.
Repair of the board and replacement of microcircuits MST6E182VS-LF-21, 25Q32, NT5TU32M16DG-AC are performed 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.
Attention! Users and owners of STV-LC3244WL TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from trying to repair themselves in order to avoid negative consequences that can lead to complete non-repairability of the device.
Additional MainBoard Repair
The appearance of the MainBoard T.MS6M182.81B is shown in the figure below:
T.MS6M182.81B
T.MS6M182.81B can be used in TVs:
DIGITAL DLE-2610 (Panel V260CD1B23-2), FUSION FLTV-32H17 (Panel LC320WXE (SB)(V2)), SUPRA STV-LC3244WL (Panel LTA320AN01), SUPRA STV-LC3244WLD (Panel LTA320AN01 ), SUPRA STV-LC3219W (Panel LC320WXE), SUPRA STV-LC32S650WL (Panel MT3151A03-1 VER22), SUPRA STV-LC46S990FL (Panel TC460FPE5).
Main features of SUPRA STV-LC3244WL device:
The matrix (LED-panel) LTA320AN01 is installed.
The necessary supply voltages for all nodes of the SUPRA STV-LC3244WL TV are provided by a switching power supply.
MainBoard - the main board (motherboard) is a T.MS6M182.81B module, using MST6E182VS-LF-21, 25Q32, NT5TU32M16DG-AC microcircuits and others.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320AN01-D
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 20 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
LED TV SUPRA STV-LC3244WL with LCD display LTA320AN01, 32 "(81 cm) 16: 9 diagonal. The required brightness of the screen 450 cd / m² is provided by LED backlight. Dynamic contrast ratio of 60,000: 1 is achieved by special control of LED operation 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.It is possible to view broadcasts, films and images in high quality HD at a resolution of 1366x768 pixels in a graphic resolution of 720p (HD Ready) 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, 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, 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 90 watts.
Overall dimensions: 779x592x205 mm.
TV weight: 9.5 kg.
Attention! The LTA320AN01 panel of SUPRA STV-LC3244WL LED TV is an expensive and unreliable component.
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.