Technical description and composition of the TV SUPRA STV-LC2477FLD, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC2477FLD
Chassis / Version: CV181L-Y
Panel: HK236WLEDM-IH61H
MainBoard: CV181L-Y
IC MainBoard: 25Q32BVS1G, X5DV330, U4-AS7805D, RT8296AH, 1517P
Tuner: CDT-3SP512-37
Technical Specifications STV-LC2477FLD
SUPRA STV-LC2477FLD
General repair guidelines for TV LCD LED
Diagnostics of malfunctions and repairs SUPRA STV-LC2477FLD, as well as other electronic devices, it is recommended to start with an external examination of the external and internal elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Electrolytic capacitors of filters with a swollen body, as well as ring cracks or a layer of coal on burned-out resistors formed in the soldered terminals of the heating elements, sometimes tell the repairman the causes of the malfunction and possible consequences.
If the SUPRA STV-LC2477FLD does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. In some cases, only the processor power regulator may be faulty. 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.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the SUPRA STV-LC2477FLD 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 HK236WLEDM-IH61H 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.
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.
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.
Repair of the CV181L-Y motherboard should 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.
When repairing an MB board, you need to check its components 25Q32BVS1G, X5DV330, U4-AS7805D, RT8296AH, 1517P. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
The malfunction of the tuner CDT-3SP512-37 is established after checking the software and all the supply voltages at its terminals.
Attention to the owners! Attempts to repair the TV SUPRA STV-LC2477FLD yourself are not recommended by the manufacturer and can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC2477FLD, Main: CV181L-Y, Panel: HK236WLEDM-IH61H
The appearance of the MainBoard CV181L-Y is shown in the figure below:The CV181L-Y motherboard uses the MST6M181VG processor, combined with a scaler and installed using the BGA technology.
It is advisable to start the repair of this MainBoard by checking the linear stabilizers and voltage converters necessary to provide power to the processor nodes: 1.2V, 2.5V, 3.3V. If there is no image, but the display backlight is working, it is necessary to check the power of the 5V or 12V LCD panel, depending on the type of panel used, which should be measured directly on the LVDS connector. If the TV does not exit Stand-by mode and does not respond to the remote control and control buttons, if the necessary supply voltages are available, the SPI Flash software should be updated.CV181L-Y can be used in TVs:
FUSION FLTV-19L16B (Panel M185B3-PA1), SUPRA STV-LC1977WLD (Panel M185BGE-P02), SUPRA STV-LC2477FLD (Panel HK236WLEDM-IH61H), THOMSON T22E32HU (Panel LM215WF4 (TL)(E7)).
Key Features of SUPRA STV-LC2477FLD:
Installed matrix (LED panel) HK236WLEDM-IH61H.
The required supply voltage for all nodes of the TV SUPRA STV-LC2477FLD provides a switching power supply.
MainBoard - the main board (motherboard) is a CV181L-Y module, using 25Q32BVS1G, X5DV330, U4-AS7805D, RT8296AH, 1517P and other chips.
The tuner CDT-3SP512-37 provides the reception of television programs and tuning to channels.
Information from an alternative source:
SUPRA STV-LC2477FLD Version V3K07
Panel Type (Matrix): M236H1-P01
Motherboard: CV181L-A, Tuner: AFT7 / W110G
LED Driver: MP3389-HK230M4CH, MP3389EF, ME15N10-6, POWER: DC 12V; 5A
LED TV SUPRA STV-LC2477FLD with LCD HK236WLEDM-IH61H, diagonal size 24 "(61 cm) 16: 9 format. The required brightness of the screen 250 cd / m² is provided by LED backlight LED. Contrast - the ratio of maximum brightness to minimum is 800: 1. Dynamic contrast ratio of 16000: 1 is achieved by special control of the LEDs depending on the lighting in the plot. The model’s display technology uses LED LED backlighting. TV features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in graphic format according to the standard 1080p (Full HD). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, DivX, VideoCD, SVCD, Picture CD, 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 x2, component, SCART, VGA, HDMI. 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, 1920x1080.
The power consumed by the TV in the operating mode from the network is 60 watts.
Overall dimensions: 580x371x187 mm.
TV Weight: 4.8 kg.
Attention! The HK236WLEDM-IH61H panel of a SUPRA STV-LC2477FLD 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.