Technical description and composition of the TV SUPRA STV-LC2410F, type of panel and applicable modules. The composition of the modules.SUPRA
Model: STV-LC2410F
Chassis / Version: V1K07
Panel: M236MWF1
Inverter (backlight): integrated into PSU
PWM Inverter: TL494C
MOSFET Inverter: ME4542
Power Supply (PSU): IP0220430 REV: 00
PWM Power: LD7750
MainBoard: JUG7.820.638-2 LS07
IC MainBoard: TSUMV26KU-LF, EN25F40, 24C32, TDA1517P,
Tuner: TAF6-C2121V11
Technical Specifications STV-LC2410F
SUPRA STV-LC2410F
General repair guidelines for TV LCD
Possible manifestations of defects
- The SUPRA STV-LC2410F TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
With such manifestations, a malfunction is most likely to be detected in the IP0220430 power module. It is necessary to measure its output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. In the absence of visible damage or open faults between the terminals, the LD7750 PWM controllers are checked by replacing them with new ones, or those that are obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the JUG7.820.638-2 motherboard should be started by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - TSUMV26KU-LF, EN25F40, 24C32, TDA1517P, with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the TAF6-C2121V11 tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention! For users and owners of STV-LC2410F TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against 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-LC2410F Cpu: TSUMV26KU-LF Panel: M236MW
The appearance of the MainBoard JUG7.820.638-2 is shown in the figure below:JUG7.820.638-2
The appearance of the power supply
Key Features of SUPRA STV-LC2410F:
The matrix (LCD panel) M236MWF1 is installed.
To power the backlight, a converter is used, combined with a power supply, controlled by a TL494C PWM controller. Keys of type ME4542 are used as power elements of the inverter.
The necessary supply voltages for all nodes of the TV SUPRA STV-LC2410F are generated by the IP0220430 power module or its analogs using LD7750 microcircuits.
MainBoard - the main board (motherboard) is a JUG7.820.638-2 module, using TSUMV26KU-LF, EN25F40, 24C32, TDA1517P, and others.
The TAF6-C2121V11 tuner provides television reception and channel tuning.
Information from an alternative source:
SUPRA STV-LC2410F Version V1K03 / Version V1J11 Same chassis as: CHANGHONG L22C699A
Panel Type (Matrix): M236MWF1
Motherboard: 1UG7.820.638-3 LS07 / JUG7.820.638-2, TSUMV26KE-LF, 25Q40T, 24C32B, YD1517P, Tuner: CH TAF6-C2I21VH 1110BB
T-con: PWB VER: 1.2 M236 not removable, MTD00-LF-10, AAT1176
PSU: IP0220430, ND7575BOS, SVD7N60F, TL494C, ME4542 x2
Additional technical information about the panel:
Brand: IVO
Model: M236MWF1 R0
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 521.28x293.22 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LCD TV SUPRA STV-LC2410F with LCD M236MW, diagonal size 24 "(60 cm) 16: 9 format. The brightness of the screen 300 cd / m² is provided by fluorescent lights CCFL (EEFL). Contrast - the ratio of maximum brightness to minimum is 1000: 1. Dynamic contrast ratio of 4000: 1 is achieved by special control of the backlight. TV features include viewing programs and movies in high quality HD with a resolution of 1920x1080 pixels in the graphic resolution of 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.
The power of the sound system 4 W (2x2 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, S-Video, component, 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.
The power consumed by the TV in the operating mode from the network is 65 watts.
Overall dimensions: 640x471x145 mm.
Mass of the TV: 6.5 kg.
Attention! The M236MW panel of a SUPRA STV-LC2410F LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen surface to avoid permanent damage to the LCD panel!
