Technical description and composition of the TV SUPRA STV-LC1985WL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC1985WL
Chassis / Version: V3L05
Panel: V185B1-LE1
LED driver (backlight): 5800-P22DT0-0010 TZ126017M
Power Supply (PSU): Adapter 12V
MainBoard: 5800-A8M260-0020 TZ126018M
IC MainBoard: CPU: MST6E181VS-LF-Z1, / FLASH: MX25L3206E
Tuner: HFT2-8F / 115CW
Technical Specifications STV-LC1985WL
SUPRA STV-LC1985WL
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should inspect all the internal components of the TV SUPRA STV-LC1985WL, as well as the external elements of the housing. Based on visible external changes in the state of the components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before making the necessary measurements. Electrolytic capacitors of filters with a swollen body, as well as ring cracks or a layer of coal on burned-out resistors formed in soldered terminals of heating elements, sometimes tell the repairman the causes of the malfunction and possible consequences.
In the absence of any signs of operability, when the SUPRA STV-LC1985WL 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. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
In cases where the SUPRA STV-LC1985WL TV has lost its image, and the sound is there and all the other functions are operational, there is a possibility of a malfunction of the LED driver (a converter for powering the 720p HD panel backlight LEDs). 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.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
An open in the LED lines connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
Diagnostics and repair of the motherboard 5800-A8M260-0020 is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required.
If it is not possible to replace the MB (SSB) card, you must check the health of its elements - CPU: MST6E181VS-LF-Z1, / FLASH: MX25L3206E. Defective components should be replaced.
Before changing the HFT2-8F / 115CW tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured on the corresponding tuner pins.
Attention! For users and owners of STV-LC1985WL 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.
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC1985WL V3L05, Main: 5800-A8M260-0020, Panel: V185B1-LE1
The appearance of the MainBoard 5800-A8M260-0020 is shown in the figure below:5800-A8M260-0020
5800-A8M260-0020 can be used in TVs:
ERISSON 32LES61 (Panel V320BJ2-P01 REV.C1), ERISSON 19LES62 (Panel SEL185V3-SD0X 720p HD), ERISSON 32LES62 (Panel 720p), SUPRA STV-LC1985WL (Panel V185B1-LE1), SUPRA STV-LC2485FL (Panel V236H1-LE4).
Key Features of SUPRA STV-LC1985WL:
Installed matrix (LED-panel) V185B1-LE1.
The LED driver 5800-P22DT0-0010 is used to power the backlight LEDs.
To power all the internal components of the SUPRA STV-LC1985WL TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a 5800-A8M260-0020 module, using CPU chips: MST6E181VS-LF-Z1, / FLASH: MX25L3206E and others.
The HFT2-8F / 115CW tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V185B1-LE1
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 13S8P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV SUPRA STV-LC1985WL with LCD display V185B1-LE1, diagonal size 19 "(48 cm) 16: 9 format. The required brightness of the screen is 250 cd / m² LED backlight LED. Contrast - the ratio of maximum brightness to minimum is 1000: 1. Dynamic contrast ratio 4000: 1 is achieved by special control of the LEDs depending on the lighting in the plot.In this model, an LED panel with the end-face LEDs is used - Edge LED. You can watch programs and movies and images in high quality HD with Resolution 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 digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported formats multimedia files: MP3, WMA, MPEG4, JPEG.
The power of the acoustic system of sound 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, audio x3, component, VGA, HDMI, 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. The digital tuner is capable of receiving television channels in DVB-T MPEG4 standards.
The power consumed by the TV in the operating mode from the network is 25 watts.
Overall dimensions: 490x370x108 mm.
TV Weight: 3.87 kg.
Attention! The V185B1-LE1 panel of a SUPRA STV-LC1985WL 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.