Technical description and composition of the TV SHIVAKI STV-19LED1, type of panel and applicable modules. The composition of the modules.SHIVAKI LED
Model: STV-19LED1
Chassis / Version: T.MSD306
Panel: LQ185T1LGN3
LED driver (backlight): HQ-LED07B
PWM LED driver: HQ9001
Power Supply (PSU): Adapter 12V 5A
MainBoard: T.MSD306.3B 10196
IC MainBoard: Spi flash: 25Q32BVSIG, Audio: YD1517P
Tuner: DT82WT-3R-E
Control: LED-851
Technical Specifications STV-19LED1
SHIVAKI STV-19LED1
General repair guidelines for TV LCD LED
In the case when the STV-19LED1 does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, the Adapter 12V 5A power supply module is probably faulty in this case. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If SHIVAKI STV-19LED1 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the LQ185T1LGN3 panel, 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 filter of the backlight unit.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
On the motherboard T.MSD306.3B 10196, in the event of a malfunction, you should first check the performance of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software).
Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - Spi flash: 25Q32BVSIG, Audio: YD1517P and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If there is no reception of television channels, but the TV works properly from external devices, first of all it is necessary to check the voltage of the tuner DT82WT-3R-E and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, remind users! Attempts to independently repair the SHIVAKI STV-19LED1 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> SHIVAKI STV-19LED1, Main: T.MSD306.3B 10196, Panel: LQ185T1LGN3
The appearance of MainBoard T.MSD306.3B is shown in the figure below:T.MSD306.3B
Main features of the SHIVAKI STV-19LED1 device:
Installed matrix (LED-panel) LQ185T1LGN3.
To power the backlight LEDs, the HQ-LED07B LED driver is used, controlled by the HQ9001 PWM controller.
To power all the internal components of the SHIVAKI STV-19LED1 TV, an external adapter type 12V 12V 5A is used.
MainBoard - the main board (motherboard) is a T.MSD306.3B module, using Spi flash: 25Q32BVSIG, Audio: YD1517P, and others.
The DT82WT-3R-E tuner provides TV reception and channel tuning.
Information from an alternative source:
SHIVAKI STV-19LED1
Panel Type (Matrix): LQ185T1LGN3
Motherboard: T.MSD306.3B 10196, UOC: Under the heatsink, Spi flash: 25Q32BVSIG, Audio: YD1517P, Tuner: DT82WT-3R-E
LED Driver: HQ-LED07B, HQ9001, POWER: External, DC 12V; 5A
Remote control: LED-851
Technical description
TV SHIVAKI STV-19LED1 with LCD display LQ185T1LGN3, diagonal size 19 "(48 cm) 16: 9 format. The required brightness of the screen 250 cd / m² is provided by LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 1000: 1. LED TV backlighting technology is implemented in the technology for making the screen of this TV model. High quality HD images can be viewed at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in . Alogovyh systems PAL, SECAM, NTSC Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, JPEG.
The power of the sound system 6 W (2x3 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, VGA, HDMI x2, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
A digital tuner is capable of receiving television channels in DVB-T standards.
The power consumed by the TV in the operating mode from the network is 50 watts.
Overall dimensions: With a support of 581x406x180 mm, Without a support of 581x371x43 mm.
Attention! The LQ185T1LGN3 panel of a SHIVAKI STV-19LED1 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.
