Technical description and composition of the SUPRA STV-LC3245LF TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC3245LF
Chassis / Version: V2J11
Panel: TC315F1H2
T-CON: V420H2-CH1; CM2669A, TPS65161, MAXIM9669E, RT8255, G5657A
LED driver (backlight): integrated into PSU
Power Supply (PSU): TE32-21 DXTE32-21
PWM Power: L6599D, L6562D, Q0270R (Stb)
MainBoard: T.MSD309.9B 10345
IC MainBoard: MSD309BT-Z1, 25Q32B, K4T51163QI-HCF7, AIC2857, R2A15122
Tuner: DT82WT-3R-E // XDTT-6F1C / T1146
STV-LC3245LF Specifications
SUPRA STV-LC3245LF
General recommendations for TV LCD LED repair
Repair of electronic equipment usually begins with its external examination and diagnosis of a malfunction. In this case, you should inspect all the internal components of the SUPRA STV-LC3245LF TV, as well as the external elements of the case. Visible damage to elements can sometimes indicate the direction of searching for a defect even before the necessary measurements are taken. If ring cracks are found in the soldering of the element terminals or broken connecting paths, swollen capacitors or charred resistors - all this may be characteristic signs of the causes or consequences of an already known typical malfunction.
If the TV does not turn on, none of the indicators on its front panel are on or blinking. Also, if the TV does not respond to the remote control and buttons, does not emit any sounds or any signs of operability when turned on, there is a certain probability that the power module is faulty and needs repair. Sometimes a problem with similar manifestations can occur only in the absence of processor power, which is typical for certain SUPRA models. In the absence of swollen capacitors of the secondary rectifier filter, diagnostics of the power supply should begin with checking the fuse and, if it breaks, it is necessary first of all to check all power semiconductor elements of the primary circuit - diodes and transistors for the likelihood of an avalanche or thermal breakdown.
The reasons for the breakdown of the power switch in switching power supplies (SMPS) can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of a PWM controller microcircuit or breaks in resistors in its strapping.
If, when turning on the TV, the image appears and immediately disappears, or is absent initially when turned on, but there is sound and other functions work, there is a high probability of a malfunction of the LED driver (the power converter for the TC-315F1H2 panel backlight LEDs). In such cases, the common power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
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.
It should be remembered that it is not possible to determine an open circuit in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
In cases of attempts to repair the motherboard T.MSD309.9B 10345, it is necessary to check the performance of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
In cases of attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - CPU: MSD309BT-Z1, spi FLASH: 25Q32B which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its pins with the board (indicated by heating)
Before replacing the XDTT-6F1C / T1146 tuner, if there is no tuning to the channels, you must first check the supply voltage at its terminals, including the supply of varicaps (30-33V).
Attention to the owners! Attempts to repair the SUPRA STV-LC3245LF TV by yourself are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Chassis MSD309B Schematic diagram
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> Supra STV-LC3245LF Main Board CV206H-C-11
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> Supra STV-LC3245LF Main Board: T.MSD309.9B 10345, Panel: TC-315F1H2, SPI Flash: Winb25Q32
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> W25Q32, 25X40BV Supra STV-LC3245LF - Version V2J11 - Main Board: T.MSD309.9B 10345, Panel: TC315F1H2
The appearance of the MainBoard T.MSD309.9B is shown in the figure below:
T.MSD309.9B
The MainBoard T.MSD309.9B uses the MSD309B processor, DDRAM random access memory (RAM) in BGA design and SPI Flash ROM of the 25Q32 type (4Mb).
It is advisable to start repairing the motherboard with checking the voltage converters and linear stabilizers necessary to provide power to the nodes in the operating and standby mode. The processor core is powered by + 1.5V. Also, the processor requires + 2.5V and + 3.3V voltages.
If the display backlight is working properly and there is no image, it is necessary to check the panel power supply (depending on the type, + 5V or + 12V), which is more convenient to measure directly at the LVDS connector. If, with all the supply voltages present, the TV does not go into operation, does not respond to the Remote Control and control buttons, you should update the SPI Flash firmware.
T.MSD309.9B can be used in TVs:BBK LEM3242DT (Panel LC320EXN SDA1), BBK LEM3241FDT (Panel 32 "), BBK LEM2687FDT (Panel V260H1-LE1), IZUMI TLE32D400B (Panel V315H3-LE4), SUPRA STV-LC3245LF (Panel TC-315F1H2), SUPRA STV-LC39T820FL (Panel TC390FP01-B), SUPRA STV-LC46T810FL (Panel 1080p Full HD 1920x1080), SUPRA STV-LC39T810FL (Panel TC390FP01-A).
External view of the power supply
Main features of SUPRA STV-LC3245LF device:
Installed matrix (LED-panel) TC315F1H2.
Matrix control uses Timing Controller (T-CON) V420H2-CH1 ;.
A converter combined with a power supply is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC3245LF TV is carried out by the TE32-21 power module, or its analogs using the L6599D, L6562D, Q0270R (Stb) microcircuits.
MainBoard - the main board (motherboard) is a T.MSD309.9B module using MSD309BT-Z1, 25Q32B, K4T51163QI-HCF7, AIC2857, R2A15122 and others.
Tuner DT82WT-3R-E // XDTT-6F1C / T1146 provides reception of television programs and tuning to channels.
SUPRA LED TV STV-LC3245LF with LCD TC-315F1H2, 32 "(81 cm) 16: 9 format diagonal. The required screen brightness of 450 cd / m2 is provided by LED backlighting. Contrast - the ratio of maximum brightness to minimum 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. The TV's capabilities provide for viewing programs and films in high quality HD at 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! The panel TC-315F1H2 of the SUPRA STV-LC3245LF LED TV 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.