Technical description and composition of the SUPRA STV-LC50S660FL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC50S660FL
Chassis / Version: V1N02
Panel: V500HJ1-LE1
LED driver (backlight): L500H1-2EA
PWM LED driver: ATP360A13, HAI 5208PB, HAI7203HA
MOSFET LED driver: M8014D
Power Supply (PSU): 5800-P47ELL-W010 168P-P47ELL-W2
PWM Power: TEA1755T
MOSFET Power: 18N50, 2SK3673
MainBoard: 5800-A5M910-0P10
IC MainBoard: SPI Flash 25Q16
Tuner: NoName
STV-LC50S660FL Specifications
SUPRA STV-LC50S660FL
General recommendations for TV LCD LED repair
Possible malfunctions
- SUPRA STV-LC50S660FL TV does not turn on, does not respond to the remote control and control panel buttons, does not light up or blink indicators.
Often in such cases, the power supply module 5800-P47ELL-W010 is faulty. Its output voltages should be measured and, in their absence, the serviceability of the power switches (18N50, 2SK3673) and the rectifier diodes in the converters should be checked for possible breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and, less often, the current sensor in the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can disable it in the key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) TEA1755T, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with known good ones.
- There is no picture, but there is sound and all other TV functions are working. The image sometimes appears for a second immediately after switching on and disappears.
As a rule, in such cases there is no display backlight. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power supply (LED driver).
It is impossible to check the LED bars for a break without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to light a single 3V LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off, or pierced in the K / Z.
- The TV does not turn on, the indicator signals standby or operating mode, or blinks.
Repair or diagnostics of the 5800-A5M910-0P10 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace 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 SPI Flash 25Q16 elements requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the warm-up method.
If there is no tuning to channels of terrestrial or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the NoName tuner outputs. It is also necessary to check with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.
Owners and users of the SUPRA STV-LC50S660FL TV should remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that can lead to complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC50S660FL V1N02, Main: 5800-A5M910-0P10, Panel: V500HJ1-LE1
To reduce the backlight current in LED drivers with the HAI7203HA controller, increase the total resistance of the resistors from pin 12 (ISET) to the case. The currents will decrease proportionally in each of the 8 channels. When the channels are connected in parallel, the currents are summed up.
Additional MainBoard RepairThe appearance of the MainBoard 5800-A5M910-0P10 is shown in the figure below:
5800-A5M910-0P10
External view of the power supply
Main features of SUPRA STV-LC50S660FL device:
The matrix (LED panel) V500HJ1-LE1 is installed.
The LED driver L500H1-2EA is used to power the backlight LEDs, it is controlled by the PWM controller ATP360A13, HAI 5208PB, HAI7203HA. The keys of the M8014D type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC50S660FL TV is carried out by the 5800-P47ELL-W010 power module, or its analogs using TEA1755T microcircuits and power switches of 18N50, 2SK3673 type.
MainBoard - the main board (motherboard) is a 5800-A5M910-0P10 module, using SPI Flash 25Q16 chips and others.
Tuner NoName provides reception of television programs and tuning to channels.
SUPRA LED TV STV-LC50S660FL with LCD V500HJ1-LE1, diagonal size 50 "(127 cm) 16: 9. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 150,000: 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 movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution in 1080p (Full HD ).
STV-LC50S660FL TV is equipped with SMART software, built-in applications and the ability to work on the Internet. Internet connection can be made via Wi-Fi wireless connection. The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping takes place in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. Uses NICAM stereo signal processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV x2, audio x3, component, VGA, HDMI x4, MHL, USB, Ethernet (RJ-45). 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.
Overall dimensions: 1252x830x190 mm.
Attention! The panel V500HJ1-LE1 of the SUPRA STV-LC50S660FL LED TV 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 unrepairable ................................ ...