Technical description and composition of the SUPRA STV-LC4217F TV, panel type and modules used. The composition of the modules.SUPRA
Model: STV-LC4217F
Chassis / Version: CV182H-B
Panel: LC420WUE (SC) (V1)
MainBoard: CV182H-B
IC MainBoard: CPU MST6M181 / 182, Flash EN25Q32
STV-LC4217F Specifications
SUPRA STV-LC4217F
General recommendations for TV LCD repair
Repair of a SUPRA TV with a CV182H-B chassis should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Many visible changes in the state of elements make it possible to determine the further direction of troubleshooting and localization of the defect. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred layer of paint on the resistors - all this for the repairman can be a significant clue in assumptions about the causes and consequences of a malfunction.
Power supply module malfunctions can be expressed in different ways, for example, SUPRA STV-LC4217F does not turn on at all and the control lamps on its front panel do not light up or blink, all signs of operability are absent. It should be noted that the processor power regulator (converter) may be faulty with the same external manifestations. When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the secondary rectifier filter 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.
Mos-Fet switches used in switching power supplies (SMPS) rarely fail without reasons that must be looked for by checking other circuit elements. Breakdown is often caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or breakdown of resistors in stabilization circuits. The PWM controller microcircuit can also cause the breakdown of the power switch of the converter.
If the SUPRA STV-LC4217F TV does not have a picture, but there is sound, the malfunction should be sought in the backlight power converter (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overestimated ESR. If, when diagnosing a malfunction, it is required to turn off 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 they are completed, it is imperative to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
On the CV182H-B motherboard, in case of a malfunction, you should first check the operability of all stabilizers or power converters of microcircuits and, if necessary, update the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU MST6M181 / 182, Flash EN25Q32 with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
We remind users again! Attempts to repair the SUPRA STV-LC4217F TV without proper qualifications and experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC4217F, Main: CV182H-B, Panel: LC420WUE(SC)(V1)
The appearance of the MainBoard CV182H-B is shown in the figure below:
CV182H-B
CV182H-B can be used in TVs:
SUPRA STV-LC4217F (Panel LC420WUE(SC)(V1)), SUPRA STV-LC3217W (Panel HV320WX2-101).
Main features of SUPRA STV-LC4217F device:
Installed matrix (LCD panel) LC420WUE (SC) (V1).
The necessary supply voltages for all nodes of the SUPRA STV-LC4217F TV are provided by a switching power supply.
MainBoard - the main board (motherboard) is a CV182H-B module using CPU MST6M181 / 182, Flash EN25Q32 and others.
Additional technical information about the panel:
Brand: LG Display
Model: LC420WUE-SCV1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 72%
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Without Driver
Signal Interface: LVDS (2 ch, 8/10-bit), 51 pins
Voltage: 12.0V
LCD TV SUPRA STV-LC4217F with LCD LC420WUE (SC) (V1), 42 "(107 cm) 16: 9 diagonal. Screen brightness of 500 cd / m² is provided by backlighting with CCFL (EEFL) fluorescent lamps. - The ratio of maximum brightness to minimum is 3000: 1. Dynamic contrast ratio of 10000: 1 is achieved by special control of the backlight. The capabilities of the TV provide viewing of programs and films in high quality HD at a resolution of 1920x1080 pixels in graphic decomposition according to the standard 1080p (Full HD). or video signal is decoded in analog systems PAL, SECAM, NTSC Graphic processing and digital signal shaping occurs in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards Supported multimedia file formats: MP3, WMA, MPEG4, JPEG.
Speaker power 16 W (2x8 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, S-Video, component, SCART x2, RGB, VGA, HDMI x3, USB. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
The power consumed by the TV in operating mode from the network is 280 watts.
Overall dimensions: 1023x726x329 mm.
TV weight: 27.5 kg.
Attention! The LC420WUE (SC) (V1) panel of the SUPRA STV-LC4217F LCD TV is the most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel!
