Technical description and composition of the SUPRA STV-LC32S650WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC32S650WL
Chassis / Version: V1L09
Panel: MT3151A03-1 VER22
LED driver (backlight): integrated into PSU
PWM LED driver: BIT3251
Power Supply (PSU): MP123T -12N
PWM Power: PWM SOT23-6 LD7535
MainBoard: T.MS6M182.81B-1
IC MainBoard: MST6M182VS-LF-Z1, NT5TU32M16DG-AC, 5Q32BVS1G, IT6633E-P, TPA3110D2
Tuner: CDT-3SP5I2-36
Control: Remote: RCI2
STV-LC32S650WL Specifications
SUPRA STV-LC32S650WL
General recommendations for TV LCD LED repair
Possible malfunctions
- SUPRA STV-LC32S650WL does not turn on, LEDs on the front panel do not light or flash. The TV does not respond to control buttons and the remote control.
In some of these cases, the main switching power supply, the MP123T module, is faulty. Then you should measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of the power switches and rectifier diodes of the converters for a possible short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in an emergency short-circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key is often cut 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 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 LD7535, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with known good ones.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
In some of these cases, the malfunction is caused by the lack of display backlighting. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
To check the health of the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED separately with a simple Chinese multimeter (powered by 9 volts) in the P-N transition test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black one to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. The serviceability of the PN junction of the Zener diode indirectly indicates the serviceability of the LED-a
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the T.MS6M182.81B-1 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). In some cases, to repair the MB (SSB) board, it may be necessary to replace chips - MST6M182VS-LF-Z1, NT5TU32M16DG-AC, 5Q32BVS1G, IT6633E-P, TPA3110D2 with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the CDT-3SP5I2-36 tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
Once again, we remind TV users: do not attempt to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the field of electronic repair.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32S650WL V1L09, Main: T.MS6M182.81B-1, Panel: MT3151A03-1 VER22
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32S650WL V1L10, Main: T.MS6M182.81B-1 11345
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32S650WL V1L11, Main: T.MS6M182.81B-1 11345, MT315A03-1
The appearance of the MainBoard T.MS6M182.81B-1 is shown in the figure below:
T.MS6M182.81B-1
T.MS6M182.81B-1 can be used in TVs:
SUPRA STV-LC32S650WL (Panel MT3151A03-1 VER22), SUPRA STV-LC46S990FL (Panel TC460FPE5).
External view of the power supply
Main features of SUPRA STV-LC32S650WL device:
Installed matrix (LED panel) MT3151A03-1 VER22.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by a BIT3251 PWM controller.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC32S650WL TV is carried out by the MP123T power module, or its analogs using PWM SOT23-6 LD7535 microcircuits.
MainBoard - the main board (motherboard) is a T.MS6M182.81B-1 module, using MST6M182VS-LF-Z1, NT5TU32M16DG-AC, 5Q32BVS1G, IT6633E-P, TPA3110D2 and others.
The CDT-3SP5I2-36 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CSOT
Model: MT3151A03-1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: HVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 12%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
SUPRA LED TV STV-LC32S650WL with LCD MT3151A03-1, diagonal size 32 "(81 cm) 16: 9. The required screen brightness of 350 cd / m2 is provided by LED backlighting. Contrast - the ratio of maximum brightness to minimum brightness is 1200: 1 Dynamic contrast ratio of 24000: 1 is achieved by special control of LEDs depending on the illumination of areas in the scene.This model uses an LED-panel with an edge-mounted backlight LEDs - Edge LED. resolution 1366x768 pixels in the standard graphic decomposition 720p (HD Ready).
STV-LC32S650WL has built-in SMART software and pre-installed Android operating system. Internet connection can be made via Wi-Fi wireless connection. The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping takes place in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Supported media file formats: MP3, WMA, MPEG4, 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 x2, audio x2, component, SCART, RGB, VGA, HDMI x2, USB x3, Ethernet (RJ-45). 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: 800x590x215 mm.
TV weight: 13.4 kg.
Attention! Panel MT3151A03-1 VER22 SUPRA LED TV STV-LC32S650WL 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.