Technical description and composition of the TV SUPRA STV-LC2244FL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC2244FL
Chassis / Version: CVMV26L-B-20
Panel: MT215DW02 V.0
MainBoard: CVMV26L-B-20
IC MainBoard: CPU: TSUMV36KE-LF, Flash: EN25F40
Tuner: F21WT-3BAR-E
Technical Specifications STV-LC2244FL
SUPRA STV-LC2244FL
General recommendations for TV LCD LED repair
Repair of electronic equipment usually begins with its external examination and diagnosis of a malfunction. In this case, you should inspect all the internal components of the SUPRA STV-LC2244FL TV, as well as the external elements of the case. 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. Experienced repairers often guess about the causes of the defect and the possible consequences, for example, by ring cracks in the soldering of the element terminals, as well as by swollen capacitors or resistors burned out to coal dust and other external indirect signs.
If SUPRA STV-LC2244FL does not turn on, no indicator lamps on the front panel will light up or blink, therefore, there is a very high probability of a power module malfunction. In some cases, only the processor power supply regulator may be faulty. When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself for no reason that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If, when SUPRA STV-LC2244FL is turned on, there is no image, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the MT215DW02 V.0 panel backlight LED circuit, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the common power supply.
Often, in the absence of backlighting, disassembly of the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of contact connections in the rulers and connectors.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter; a voltage of the order of several tens of volts is required.
Repair or diagnostics of the CVMV26L-B-20 motherboard should begin by checking the stabilizers or power converters of its microcircuits. If necessary, update the software (software).
When repairing an MB board, you need to check its components CPU: TSUMV36KE-LF, Flash: EN25F40. Defective elements must be replaced. If BGA chips are installed, their failure is usually localized by warming up.
Before replacing the F21WT-3BAR-E tuner, if there is no tuning to the channels, you must first check the supply voltage at its terminals.
It should be remembered! Attempts to repair the TV SUPRA STV-LC2244FL, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC2244FL, Main: CVMV26L-B-20, Panel: MT215DW02 V.0
The appearance of the MainBoard CVMV26L-B-20 is shown in the figure below:CVMV26L-B-20
CVMV26L-B-20 can be used in TVs:
ERISSON 19LEJ02 (Panel LM185WH2 (TL)(A1)), ERISSON 19LEJ10 (Panel 720p HD 1366x768), FUSION FLTV-15W7 (Panel LTN156AT05), HYUNDAI H-LEDVD24V2 (Panel M236MWF1), HYUNDAI H-LEDVD22V2 (Panel M215H1-L01), SUPRA STV-LC2225WL (Panel MT215DW01 V.1), SUPRA STV-LC2425WL STV-LC2225WL (Panel M236MWF1 M216H1-L01), SUPRA STV-LC1925WL (Panel MT185GW01 V.1), SUPRA STV-LC1925W (Panel MT185GW01 V.1), SUPRA STV-LC22390FD (Panel HM215WU1-300), SUPRA STV-LC2244FL (Panel MT215DW02 V.0).
Main features of SUPRA STV-LC2244FL device:
Installed matrix (LED-panel) MT215DW02 V.0.
The required supply voltage for all nodes of the TV SUPRA STV-LC2244FL provides a switching power supply.
MainBoard - the main board (motherboard) is a CVMV26L-B-20 module, using CPU chips: TSUMV36KE-LF, Flash: EN25F40 and others.
The F21WT-3BAR-E tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: MT215DW02 V.0
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 14S8P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV SUPRA STV-LC2244FL with LCD MT215DW02, diagonal size 22 "(56 cm) 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 20,000: 1 is achieved by special control of LED operation depending on the illumination of the areas in the scene.This model uses an LED panel with an edge LED backlighting - Edge LED.The TV capabilities provide viewing of programs and films in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC.Graphic processing and digital signal shaping takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the sound system of 6 W (2x3 W) is provided by two speakers. The NICAM STEREO audio processing system 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, RGB, VGA, HDMI. A headphone output 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 operating mode from the network is 40 watts.
Overall dimensions: 531x380x165 mm.
TV Weight: 3.1 kg.
Attention! SUPRA STV-LC2244FL LED TV panel MT215DW02 V.0 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.