Technical description and composition of the SUPRA STV-LC39520WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC39520WL
Chassis / Version: CV59SH-J
Panel: V390HJ1-P02
MainBoard: CV59SH-J
IC MainBoard: CPU: TSUMV59XUS-Z1; SPI Flash: GD25Q32BSIG; SOUND: TPA3110D2
Tuner: CDT-3NP5I2-10
STV-LC39520FL Specifications
SUPRA STV-LC39520WL
General recommendations for TV LCD LED repair
Repair and diagnostics of any electronic device, in particular SUPRA STV-LC39520WL, it is advisable to begin with a careful external examination of the internal and external elements. From visible external changes in the state of components, it is often possible to determine the further direction of troubleshooting before taking the necessary measurements. Swollen electrolytic or sintered capacitors, charred resistors, ring cracks in the soldering of the element terminals - all this can significantly help the master to determine the causes and consequences of the malfunctions in the TV.
In cases where the SUPRA STV-LC39520WL TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light or blink, and there are no sounds and no signs of operation when turned on, the power module is most likely faulty or there is no power processor on the motherboard (typical defect of some SUPRA TV models). When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. If it breaks, the power elements of the transistors and diodes of the rectifier bridge should be checked for avalanche (thermal) breakdown.
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, when you turn on the TV, the image appears and immediately disappears, or is absent initially when turned on, but there is sound and other functions work, there is a high probability of a malfunction of the LED driver (the V390HJ1-P02 panel backlight LED power converter). In such cases, the common power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
A malfunction in the backlight circuits often occurs due to an open circuit in the power supply circuit of the LED lines. It is required to disassemble the panel and check the LEDs themselves, the ration of their outputs, as well as the reliability of the connections in the connectors and the ration of the connector pins.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or microcircuit power converters and, if necessary, update the software (software).
In some cases, it is necessary to check or replace (if necessary) elements of the MB (SSB) - Flash 25Q32 board. In cases where a BGA processor is used, its malfunction is usually detected by the local warm-up method.
We remind users again! Attempts to self-repair the SUPRA STV-LC39520WL TV without the appropriate qualifications and experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC39520WL , Main: CV59SH-J, Panel: V390HJ1-P02
The MainBoard CV59SH-J is shown in the figure below:CV59SH-J
Main features of SUPRA STV-LC39520WL device:
Installed matrix (LED panel) V390HJ1-P02.
The necessary supply voltages for all nodes of the SUPRA STV-LC39520WL TV are provided by a switching power supply.
MainBoard - the main board (motherboard) is a CV59SH-J module, using CPU chips: TSUMV59XUS-Z1; SPI Flash: GD25Q32BSIG; SOUND: TPA3110D2 and others.
The CDT-3NP5I2-10 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V390HJ1-P02
Type: a-Si TFT-LCD, CELL
Diagonal size: 39 inch
Resolution: 1920x1080, FHD
Display Mode: MVA, Normally Black, Transmissive
Active Area: 853.92x480.33 mm
Surface: Antiglare (Haze 3.5%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 5.8% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
SUPRA LED TV STV-LC39520WL with LCD V390HJ1-P02, diagonal 39 "(99 cm) in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 100,000: 1 is achieved by special control operation of LEDs depending on the illumination of areas in the scene.This model uses an LED-panel with an edge arrangement of backlighting LEDs - Edge LED.The TV capabilities provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution in the standard 1080p (Full HD ) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, MKV, JPEG.
Speaker power 12 W (2x6 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 x2, component, VGA, HDMI x3, USB. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768.
The power consumed by the TV in operating mode from the network is 90 watts.
Overall dimensions: 889x592x227 mm.
TV weight: 8.7 kg.
Attention! Panel V390HJ1-P02 HK390LEDM-CH06H SUPRA LED TV STV-LC39520WL is an expensive and unreliable element.
Do not allow any impacts on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV non-repairable.
