Technical description and composition of the SUPRA STV-LC19410WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC19410WL
Chassis / Version: T.VST29.61C 12296
Panel: M185BGE-P02 HK185WLEDM-CH15H // V185B1-PE1
LED driver (backlight): integrated into PSU
PWM LED driver: OB3362RP
Power Supply (PSU): HKC-PL01
PWM Power: SG6848 (6 pin)
MOSFET Power: SVF7N65F
MainBoard: T.VST29.61C 12296
IC MainBoard: Cpu: TSUMV59XU-Z1, Spi: Flash W25Q32FVS, YD1517P
Tuner: CDT-3SP512-36
Technical Specifications STV-LC19410WL
SUPRA STV-LC19410WL
General recommendations for TV LCD LED repair
Repair of the SUPRA STV-LC19410WL TV should begin with a careful external examination of all its components and modules. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before starting the necessary measurements. Charred paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering on the leads of heating elements or transformers can often suggest the causes of the defect and possible consequences.
If the power supply module is faulty, external manifestations may be different, for example, SUPRA STV-LC19410WL does not turn on at all and there is no indication of control lamps on the front panel. With the same symptoms, the regulator (converter) of the control processor power supply may be faulty. It is advisable to start diagnostics of the power supply module by checking the condition of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. In the event that the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in a breakdown state in such situations.
Mos-Fet switches used in switching power supplies (SMPS) rarely fail without reasons that must be looked for by checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller microcircuit can also cause the breakdown of the power switch of the converter.
Sometimes the SUPRA STV-LC19410WL TV does not have a picture, but there is sound, or the picture appears and immediately disappears. In this case, there is a high probability of a malfunction of the LED backlight converter M185BGE-P02 HK185WLEDM-CH15H, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to make sure that all electrolytic capacitors of the filter are in good working order for the power supply of the LED driver itself, including the power supply unit (power supply unit).
It is often necessary to disassemble the panel to check the health of the LEDs, as well as the contact connections in the connectors and solders.
An open circuit in the LED rows connected in series cannot be detected with a multimeter or tester without disassembling the panel. It takes several tens of volts to open all the junctions, and it is best to use a current source for such purposes.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of 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 Cpu TSUMV59XU-Z1 Spi Flash W25Q32FVS elements requires the necessary training and professional skills in repairing modules at the component level. Problems associated with BGA soldering technologies can be diagnosed by the warm-up method.
We recommend the owners of the STV-LC19410WL TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> Supra STV-LC19410WL Main Board T.VST29.61C 12296
FIRMWARE FOR SPI FLASH -----------> Supra STV-LC19410WL Panel HK185WLEDM-CH15H
Entering the service: From the remote control, dial - menu - 2580.
When installing microcircuits of the type SG6848T (AAH ..) instead of analogs SG6849 ... (AE ..., BB ...), you must have a frequency setting resistor from the third pin of the microcircuit to the case. Denomination 95-100kOhm.
Of the possible replacements, we can recommend the most popular commercially available LD7535, LD7550, OB2262, OB2273 and other available analogues. The use of pin 3 needs to be clarified in the documentation.
In cases where a failure has occurred in Winbond's SPI FLASH software, we recommend replacing the chip with a new one. Often faulty Winbond microcircuits can temporarily restore their operability after temperature exposure, for example, when a soldering station is heated by a hairdryer. Sometimes this is enough to read the standard software content.
To reduce the backlight current in LED drivers with OB3362RP (TSOP16) controller, increase the total resistance of the resistors from pin 5 (ISET) to the case. The maximum current in each of the four channels (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 3000 * 1.2V / Rset.
Repair MainBoardThe appearance of MainBoard T.VST29.61C is shown in the figure below:
T.VST29.61C
T.VST29.61C can be used in TVs:
GOLDSTAR LT-24A300F (Panel M236HGE-P01), GoldStar LD-19A300R (Panel V185B1-PE1), SUPRA STV-LC19410WL (Panel M185BGE-P02 HK185WLEDM-CH15H), SUPRA STV-LC2277FL (Panel LM215DA-T01), SUPRA STV-LC22410WL (Panel LM216DA-T01), SUPRA STV-LC24410FL (Panel M236H1-P01 HK236WLEDM-CH84H ).
External view of the power supply
Main features of SUPRA STV-LC19410WL device:
Installed matrix (LED panel) M185BGE-P02 HK185WLEDM-CH15H or V185B1-PE1.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the OB3362RP PWM controller.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC19410WL TV is carried out by the HKC-PL01 power module, or its analogs using SG6848 microcircuits (6 pin) and power switches of the SVF7N65F type.
MainBoard - the main board (motherboard) is a T.VST29.61C module using Cpu chips: TSUMV59XU-Z1, Spi: Flash W25Q32FVS, YD1517P and others.
The CDT-3SP512-36 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: M185BGE-P02
Type: a-Si TFT-LCD, CELL
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)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.6% (with Polarizer)
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV SUPRA STV-LC19410WL with LCD display M185BGE-P02, diagonal size 19 "(48 cm) 16: 9 format. The required brightness of the screen 250 cd / m² is provided by LED backlight LED. Dynamic contrast ratio of 14000: 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.It is possible to view broadcasts and films and images in high quality HD at a resolution of 1366x768 pixels in the standard graphic resolution 720p (HD Ready) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal formation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, MPEG4, MKV, JPEG ...
The power of the sound system of 6 W (2x3 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, SCART, RGB, VGA, HDMI, 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, 1360x768.
Overall dimensions: 454x337x155 mm.
TV weight: 2.75 kg.
Attention! Panel M185BGE-P02 HK185WLEDM-CH15H SUPRA STV-LC19410WL 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.