Technical description and composition of the TV SUPRA STV-LC19T880WL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC19T880WL
Chassis / Version: CV9202L-T
Panel: LC185TT7A
MainBoard: CV9202L-T
IC MainBoard: Cpu: Sunplus SPV9202BD, DDRAM: W6310GKB-12, Spi Flash: 25Q64
Tuner: ST03WS-2A-E
Technical Specifications STV-LC19T880WL
SUPRA STV-LC19T880WL
General repair guidelines for TV LCD LED
Repair of TVs, as well as other devices, it is advisable to start with an external examination. From the visible external changes in the state of the components, it is often possible to determine the further direction of the troubleshooting before making the necessary measurements. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
In the absence of any signs of operability, when the SUPRA STV-LC19T880WL does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. You should also check the rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter.
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 checked by replacing it with a known good one.
If the SUPRA STV-LC19T880WL does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the LC185TT7A panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
It should be remembered that it is not possible to determine the break in the LED lines without disassembling the panels with 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.
Repair of the CV9202L-T motherboard must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Testing or replacing Flash 25Q64F elements requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
Attention! For users and owners of STV-LC19T880WL TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL Main Board ------------------> CV9202L-T
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC19T880WL , Main: CV9202L-T, Panel: LC185TT7A
The appearance of the MainBoard CV9202L-T is shown in the figure below:CV9202L-T
The MainBoard CV9202L-T uses the SPV9202BD processor, W6310GKB-12 RAM, and SPI FLASH 8Mb ROM.CV9202L-T can be used in TVs:
It is advisable to start the repair of the motherboard by checking all voltage converters and linear stabilizers necessary to provide power to the nodes and chips in operating and standby mode. The processor core is powered by + 1V. Also, for the operation of the SPV9202BD, voltages + 2.5V and + 3.3V are required. Check the power supply of the LCD panel (depending on the type, + 5V or + 12V) it is convenient to measure directly on the LVDS connector. If the TV does not exit Stand-by mode, if it has the necessary supply voltage, does not respond to the Remote Control and control buttons, the SPI Flash 25Q64 firmware should be updated.
AIWA 24LE7020 (Panel V236BJ1-P01), BBK 22LEM-1006/FT2C (Panel M215HTN01.1 KM215N19-AU-01), DEXP 19A3100 (Panel CX185LEDM), DEXP 22A7100 (Panel T215HVN01.0 M215HVN01.0), FUSION FLTV-24T22 (Panel M236HGE-P02), FUSION FLTV-22T22 (Panel 720p HD 1366x768), SHIVAKI STV-24LED14 (Panel V236BJ1-P01 / CX236LEDM), SUPRA STV-LC24T410FL (Panel M236HGE-P01), SUPRA STV-LC19T410WL (Panel HK185WLEDM CH25H), SUPRA STV-LC22T410FL (Panel LC215DT5A), SUPRA STV-LC24T410WL (Panel HK236WLEDM-CH24H), SUPRA STV-LC19T880WL (Panel LC185TT7A).
Main features of the SUPRA STV-LC19T880WL device:
Installed matrix (LED-panel) LC185TT7A.
The required supply voltage for all nodes of the TV SUPRA STV-LC19T880WL provides a switching power supply.
MainBoard - the main board (motherboard) is a CV9202L-T module using Cpu chips: Sunplus SPV9202BD, DDRAM: W6310GKB-12, Spi Flash: 25Q64 and others.
The ST03WS-2A-E tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: PANDA
Model: LC185TT7A
Type: a-Si TFT-LCD, CELL
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare, Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.4% (with Polarizer)
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC)
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV SUPRA STV-LC19T880WL with LCD display LC185TT7A, diagonal size 18.5 "(47 cm) 16: 9 format. The required brightness of the screen 250 cd / m² is provided by LED backlight LED. Dynamic contrast ratio of 20,000: 1 is achieved by special control of the LEDs depending on the illuminated areas in the plot. The model’s display technology uses LED LED backlighting. 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 PAL, SECAM, NTSC systems. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV, 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, USB x2. 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, 1360x768. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: With stand 1235x758x284 mm, Without stand 713x435x86 mm.
Attention! The LC185TT7A panel of a SUPRA STV-LC19T880WL 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.
