Technical description and composition of the SUPRA STV-LC3214W TV, panel type and modules used. The composition of the modules.SUPRA
Model: STV-LC3214W
Chassis / Version: JUG7.820.767-2
Panel: LCG315B1-L01
Inverter (backlight): integrated into PSU
PWM Inverter: SG3525, AS358A, F2222
Power Supply (PSU): MIP320F
PWM Power: LD7535 (PWM 6 pin St-By + 5V), L6562D (PFC), SG3525 (+ 12V)
MOSFET Power: STD5N52U, F2HNK60Z
MainBoard: JUG7.820.767-2 LS08
IC MainBoard: Video TDA9885TS; Sound STA5598W; SDRAM H5PS5162FFR; Flash AT26DF321; EEPROM 24LC32B
Tuner: CDT-3LC4I1-00
STV-LC3214W Specifications
SUPRA STV-LC3214W
General recommendations for TV LCD repair
Repair and diagnostics of any electronic device, in particular SUPRA with JUG7.820.767-2 chassis, it is advisable to begin with a careful external examination of the internal and external elements. Based on visible changes in the state of components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before taking the necessary measurements. In most cases, the repairman can guess about the causes of the defect and the possible consequences by the characteristic signs of typical defects in TVs, for example, the formed ring cracks in the soldering of the element terminals, swollen capacitors of the rectifier filter, charred resistors and other circuit elements.
In the case when the STV-LC3214W does not turn on, does not respond to the remote control and front panel buttons, does not blink the lights and does not show any signs of operability, the MIP320F power supply 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. primary circuit - diodes and transistors for the probability of avalanche or thermal breakdown.
It should be borne in mind that in the practice of repair, it is extremely rare for key transistors in switching power supplies (SMPS) to fail without reasons that should be looked for by checking other components, for example, a key breakdown can provoke faulty elements of damper circuits, or dried electrolytic capacitors or broken primary resistors power supply circuits involved in the stabilization process. In this case, all semiconductor elements of the piping of the PWM regulator chip LD7535 (St-By + 5V) L6562D (PFC) are subject to verification; SG3525 (+ 12V), which should be checked by replacement.
Sometimes the SUPRA STV-LC3214W TV does not have a picture, but there is sound, or the picture appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or the lamps themselves, which can be checked by replacing. In such cases, it is necessary to make sure that all electrolytic capacitors of the filter are in good working order for the power supply of the inverter itself, including the power supply unit (power supply unit). When disabling the protection of the inverter (to enable diagnostics), special care must be taken due to the risk of failure of the power elements. After the completion of all repair work, it is imperative to restore the protection circuits for the full and safe further operation of the TV by the user.
Owners of the STV-LC3214W TV are advised to contact only qualified specialists with experience for repair! Attempts to repair yourself without the appropriate knowledge and skills can lead to serious negative consequences!Diagnostics and repair of the JUG7.820.767-2 LS08 motherboard is carried out by checking the functionality of the stabilizers or power converters of the module chips. In some cases, a software update is required. 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 - Video TDA9885TS; Sound STA5598W; SDRAM H5PS5162FFR; Flash AT26DF321; EEPROM 24LC32B and defective chips replace 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.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC3214W, Main: JUG7.820.767-2, Panel: LCG315B1-L01
The appearance of the MainBoard JUG7.820.767-2 is shown in the figure below:JUG7.820.767-2
Additionally by PSU
The STV-LC3214W TV has a MIP320F power supply module using a PFC (Power Factor Correction) circuit that acts as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the L6562D PWM regulator does not allow connecting the electrolytic capacitor of the input rectifier filter to the network directly through open diodes, when the charge current is determined by its reactance (about 15-30 ohms at a frequency of 50 Hz). As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current follows the phase and shape of the sinusoid of the input voltage. Checking the health of the PFC unit is carried out by measuring the DC voltage across the capacitor of the mains rectifier. In working mode, it should be about 380V, in standby about 300V.
Main features of SUPRA STV-LC3214W device:
Installed matrix (LCD panel) LCG315B1-L01.
A converter combined with a power supply is used to power the backlight lamps, it is controlled by a PWM controller SG3525, AS358A, F2222.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC3214W TV is carried out by the MIP320F power module, or its analogs using LD7535 (PWM 6 pin St-By + 5V), L6562D (PFC), SG3525 (+ 12V) power switches and power switches of the STD5N52U type , F2HNK60Z.
MainBoard - the main board (motherboard) is a JUG7.820.767-2 module, using Video TDA9885TS chips; Sound STA5598W; SDRAM H5PS5162FFR; Flash AT26DF321; EEPROM 24LC32B and others.
The CDT-3LC4I1-00 tuner provides reception of television programs and tuning to channels.
SUPRA LCD TV STV-LC3214W with LCG315B1-L01 LCD, 32 "(81 cm) 16: 9 diagonal. Screen brightness of 500 cd / m² is provided by CCFL (EEFL) fluorescent lighting. Contrast is the ratio of maximum brightness to a minimum of 1200: 1. Dynamic contrast ratio of 5000: 1 is achieved by a special control of the backlight.It is possible to view broadcasts and films and images in high quality HD at a resolution of 1366x768 pixels in the graphic resolution 720p (HD Ready) .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 multimedia file formats: MP3, MPEG4, 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, audio x4, component x2, SCART x2, RGB, VGA, HDMI x3, USB x2. 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, 1360x768.
The power consumed by the TV in operating mode from the network is 150 watts.
Overall dimensions: 885x680x180 mm.
TV weight: 15 kg.
Attention! The LCG315B1-L01 panel of the SUPRA STV-LC3214W LCD TV is the most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel!