Technical description and composition of the TV SUPRA STV-LC1911WD, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC1911WD
Chassis / Version: V1L07
Panel: HT190WG1-600
MainBoard: JUG7.820.510-2
IC MainBoard: CPU: MST718BE-LF, Flash: Winb25X40 (A) (U24), Eeprom - 24C32 (U23)
Tuner: TAF6-C2121VH
Technical Specifications STV-LC1911WD
SUPRA STV-LC1911WD
General repair guidelines for TV LCD LED
TV SUPRA STV-LC1911WD, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. In some cases, faulty elements can be seen with the naked eye, for example, carbonized resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
Sometimes the SUPRA STV-LC1911WD TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. If it is working properly, it is necessary to check the processor batteries on the SSB (Main Board). When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the rectifier bridge of the mains voltage and the power switch (s) of the converter.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
In cases where the SUPRA STV-LC1911WD TV has lost its image and the sound is there and all other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the HT190WG1-600 panel). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the soldering of their outputs, as well as the reliability of the connections in the connectors and the soldering of the conclusions of the connectors.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source.
In cases of attempts to repair the JUG7.820.510-2 motherboard, it is necessary to check the operability 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 some cases, it is necessary to check or replace (if necessary) the elements of the MB (SSB) board - CPU: MST718BE-LF, Flash: Winb25X40 (A) (U24), Eeprom - 24C32 (U23). In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before changing the tuner TAF6-C2121VH, if it is not possible to tune to television channels, make sure that there are supply voltages, including varicap supply (30-33V), which must be measured on the corresponding tuner pins.
We recommend the owners of the STV-LC1911WD TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC1911WD V1L07, Main: JUG7.820.510-2, Panel: HT190WG1-600
The appearance of the MainBoard JUG7.820.510-2 is shown in the figure below:JUG7.820.510-2
JUG7.820.510-2 can be used on TVs:
SUPRA STV-LC1904W (Panel HT190WG1-600), SUPRA STV-LC2204W (Panel CLAA216WA01), SUPRA STV-LC1911WD (Panel HT190WG1-600).
Key Features of SUPRA STV-LC1911WD:
Installed matrix (LED panel) HT190WG1-600.
The required supply voltage for all nodes of the TV SUPRA STV-LC1911WD provides a switching power supply.
MainBoard - the main board (motherboard) is a JUG7.820.510-2 module, using CPU chips: MST718BE-LF, Flash: Winb25X40 (A) (U24), Eeprom - 24C32 (U23) and others.
The TAF6-C2121VH tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: BOE
Model: HT190WG1-600
Type: a-Si TFT-LCD, Panel
Diagonal size: 19.0 inch
Resolution: 1440x900, WXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 408.24x255.15 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LCD TV SUPRA STV-LC1911WD with LCD display HT190WG1-600, diagonal size 19 "(48 cm), 16: 9 format. The brightness of the screen is 300 cd / m² with CCFL (EEFL) fluorescent lamps. Contrast is the ratio of maximum brightness to a minimum of 1000: 1. You can watch broadcasts and movies and images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and generation digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: MP3, MPEG4, VideoCD, SVCD, Picture CD, JPEG.
The power of the sound system 4 W (2x2 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, audio x2, S-Video, component, VGA. 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.
The power consumed by the TV in the operating mode from the network is 60 watts.
Overall dimensions: 522x455x145 mm.
TV Weight: 7.5 kg.
Attention! The HT190WG1-600 panel of a SUPRA STV-LC1911WD LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen surface to avoid permanent damage to the LCD panel!
