Technical description and composition of the TV SUPRA STV-LC1925W, type of panel and applicable modules. The composition of the modules.SUPRA
Model: STV-LC1925W
Chassis / Version: V1J08
Panel: MT185GW01 V.1
Inverter (backlight): HTX-LP261202C
PWM Inverter: MP3389EF
Power Supply (PSU): Adapter
MainBoard: CVMV26L-B-20
IC MainBoard: TSUMV26KE-LF, EEPROM: K24C32, FLASH: F40-100GP, Audio: TDA1517P
Tuner: F21WT-3BAR-E
Technical Specifications STV-LC1925WL
SUPRA STV-LC1925W
General repair guidelines for TV LCD
It is recommended that you start diagnostics and repair of SUPRA with the V1J08 chassis, as well as other electronic devices, with an external inspection of the external and internal elements. Often, according to the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In cases where the SUPRA STV-LC1925W TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely faulty or there is no power processor on the motherboard (a typical defect of some models of SUPRA TVs). 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.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the binding of the PWM controller microcircuit are subject to verification, which it is desirable to verify by replacement.
In cases where the SUPRA STV-LC1925W TV has lost its image, and the sound is there and all other functions are operational, there is a possibility of an inverter (converter for powering the backlight) malfunction. When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power. When diagnosing a malfunction of the inverter with the protection turned off, special care must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
In case of a malfunction on the CVM26L-B-20 motherboard, first of all, check the operability of all stabilizers or power converters of the microcircuits and, if necessary, update the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements TSUMV26KE-LF, EEPROM: K24C32, FLASH: F40-100GP, Audio: TDA1517P requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technology can be diagnosed by warming up.
It should be remembered! Attempts to repair the SUPRA STV-LC1925W TV, 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-LC1925W, Main СVM26L-B-20, Panel MT185GW01 V.1
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).
Key Features of SUPRA STV-LC1925W:
Installed matrix (LCD panel) MT185GW01 V.1.
The HTX-LP261202C inverter is used to power the backlight, controlled by the MP3389EF PWM controller.
The SUPRA STV-LC1925W uses an external adapter type to power all the internal components of the SUPRA STV-LC1925W.
MainBoard - the main board (motherboard) is a CVMV26L-B-20 module, using TSUMV26KE-LF chips, EEPROM: K24C32, FLASH: F40-100GP, Audio: TDA1517P and others.
The F21WT-3BAR-E tuner provides television reception and channel tuning.
Information from an alternative source:
SUPRA STV-LC1925WL Version V1J08
Panel Type (Matrix): MT185GW01 V.1
Motherboard: CVMV26L-B-20, TSUMV26KE-LF, TDA1517P, Tuner: F21WT-3BAR-E / TCL100509533 12 00
T-con: MT185GW01V1 C1-B Not Removable
LED Driver: HTX-LP261202, POWER: DC 12V; 5A
Additional technical information about the panel:
Brand: INNOLUX
Model: MT185GW01 V.1
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 (6-bit + Hi-FRC), CIE1931 68%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12S3Px2CN WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV SUPRA STV-LC1925WL with LCD display MT185GW01, diagonal size 19 "(48 cm) 16:10 format. The required brightness of the screen is 300 cd / m² LED backlight LED. Contrast - the ratio of maximum brightness to minimum is 1500: 1. Dynamic contrast ratio of 20,000: 1 is achieved by special control of the LEDs depending on the illuminance of sections 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 1440x900 pixels in the standard 720p graphic resolution (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 the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, JPEG. Stereo audio implemented by two built-in speakers. Audio NICAM STEREO.
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, 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 power consumed by the TV in the operating mode from the network is 60 watts.
Overall dimensions: 459x338x175 mm.
TV Weight: 3.6 kg.
Attention! The MT185GW01 V.1 panel of a SUPRA STV-LC1925WL 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.