Technical description and composition of the TV SUPRA STV-LC18251FL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC18251FL
Chassis / Version: T.VST59.62
Panel: N173HGE-L11 Rev. C1
LED driver (backlight): integrated into MainBoard
PWM LED driver: TPS54329
Power Supply (PSU): Adapter 12V
MainBoard: T.VST59.62
IC MainBoard: CPU TSUMV59XU-Z1, Flash 25Q32B2, TDA-1517P, TPS54329 (PWM Step-down), BL8024 (PWM Step-down marker GG ..)
Tuner: CDT-3NP5i1-10
Technical Specifications STV-LC18251FL
SUPRA STV-LC18251FL
General repair guidelines for TV LCD LED
TV SUPRA STV-LC18251FL, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
If the STV-LC18251FL TV does not turn on, does not emit any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, only the stabilizer or power converter of the control processor may be malfunctioning, which is typical for some SUPRA models. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the rectifier bridge of the mains voltage and the power switch (s) of the converter.
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 the SUPRA STV-LC18251FL does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the N173HGE-L11 Rev. panel is likely. C1. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
An open in the LED lines connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
Diagnostics and repair of the motherboard T.VST59.62 is carried out by checking the operability of the stabilizers or power converters of the module chips. In some cases, a software update is required.
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips TSUMV59XU-Z1, Flash 25Q32B and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before replacing the tuner CDT-3NP5i1-10, if there is no tuning for the channels, you must first check the supply voltage at its terminals.
Attention to users! Self-repair of a TV SUPRA STV-LC18251FL without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC18251FL, Main: T.VST59.62, Panel: N173HGE-L11 Rev. C1
The appearance of MainBoard T.VST59.62 is shown in the figure below:T.VST59.62
It is advisable to start repairing the T.VST59.62 motherboard based on the TSUMV59Xxx multifunction processor by checking the performance of linear voltage stabilizers or voltage converters necessary to provide power to the processor nodes - 1.2V core power, DDR 1.8V memory and Stand-by 3.3V mode . If there is no image, but if the display backlight is working properly, you should check the power supply voltage of the LCD panel 5V or 12V, depending on the type of panel used.
T.VST59.62 can be used on TVs:
Akai LEA-22V21M (Panel A215ED1DA3-1), ERISSON 22LEN18 (Panel M215HGJ-L21), ERISSON 16LEN18 (Panel N156BGE-L11 Rev.C1), ERISSON 24LEN18 (Panel M236HGE-L20), Fusion FLTV-16L10B (Panel T156LL10-AW4), FUSION FLTV-24T9 (Panel M240HW01 V.B), FUSION FLTV-16T9 (Panel B156XTN02), FUSION FLTV-16T9D (Panel T156LL10-AW4), HYUNDAI H-LED19V13 (Panel CX185LEDM ), SUPRA STV-LC19811FL (Panel M185XTN01.3), SUPRA STV-LC19820WL (Panel LM185WH2), SUPRA STV-LC22820FL (Panel LS215AFTNM), SUPRA STV-LC18250WL (Panel B173HW02 V.1), SUPRA STV-LC22810FL (Panel M215HGE-L21 Rev.C1), SUPRA STV-LC16810WL (Panel B156RW01 V.1), SUPRA STV-LC18251FL (Panel N173HGE-L11 Rev. C1), SUPRA STV-LC22811FL (Panel 1080p Full HD 1920x1080), SUPRA STV-LC1982WL (Panel 1080p Full HD 1920x1080), TELEFUNKEN TF-LED22S3 (Panel M215HGE-P02).
Main features of the SUPRA STV-LC18251FL device:
Installed matrix (LED-panel) N173HGE-L11 Rev. C1.
To power the backlight LEDs, a converter is used, combined with the T.VST59.62 main board, controlled by the TPS54329 PWM controller.
To power all internal nodes of the SUPRA STV-LC18251FL TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a T.VST59.62 module, using CPU chips TSUMV59XU-Z1, Flash 25Q32B2, TDA-1517P, TPS54329 (PWM Step-down), BL8024 (PWM Step-down marker GG .. ) and others.
The tuner CDT-3NP5i1-10 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: N173HGE-L11 3 Compatible model
Type: a-Si TFT-LCD, Panel
Diagonal size: 17.3 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 381.888x214.812 mm
Shape Style: Wedge (PCBA Bent, Depth ≥5.2mm)
Surface: Antiglare, Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 650: 1
Display Colors: 262K (6-bit), CIE1931 72%
Response Time: 2/6 (Tr / Td)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 6-bit), 40 pins
Voltage: 3.3V
LED TV SUPRA STV-LC18251FL with LCD N173HGE-L11, diagonal size 17 "(43 cm) 16: 9 format. The required brightness of the screen 220 cd / m² is provided by LED backlight LED. Dynamic contrast ratio 10000: 1 is achieved by special control LEDs work depending on the illuminance of the plot sections. This model uses an LED panel with the end-face positioning of the backlight LEDs - Edge LED. You can watch programs and movies and images in high quality HD at a resolution of 1600x900 pixels in the standard of graphic decomposition 720p (HD Ready) The input high-frequency or video signal is decoded in PAL, SECAM, NTSC analog systems. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, MKV, JPEG.
The power of the sound system 6 W (2x3 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 x2, component, SCART, 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.
Overall dimensions: With stand 425x330x125 mm, Without stand 425x275x45 mm.
Attention! Panel N173HGE-L11 Rev. C1 LED-TV SUPRA STV-LC18251FL 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.