Technical description and composition of the SUPRA STV-LC42ST660FL00 TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC42ST660FL00
Chassis / Version: V1N10
Panel: LC420DUJ-SGK1
T-CON: 6870C-0469A
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9967
MOSFET LED driver: ME15N10
Power Supply (PSU): 168P-L3L026-W0 5800-L3L026-WOOO
PWM Power: TEA1733
MainBoard: 5800-A6M88G-0P10 Ver00.00
IC MainBoard: CPU: PNX85637EB, NAND FLASH: TC58NVG1S3HTA00, EEPROM: 24C64, AUDIO: TPA3110D2
Tuner: DVB + SAT
STV-LC42 ST660FL00 Specifications
SUPRA STV-LC42ST660FL00
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- SUPRA STV-LC42ST660FL00 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light up or blink, the TV does not respond to the control buttons.
With such manifestations, the power module 168P-L3L026-W0 usually fails. Its output voltages should be measured and, in their absence, the serviceability of the power switches and rectifier diodes in the converters should be checked for possible breakdown.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key is most often cut off.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM regulator, in frequency-setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) TEA1733 are usually checked by replacing them with new ones, or knowingly working.
- There is no picture, but there is sound and all other functions work. Sometimes, when turned on, the image appears and disappears for a second.
Usually, in such cases, there is no backlighting of the LED panel (matrix). The reason can sometimes be in the power supply of the LEDs, but more often in their malfunction (breakdown or breakage), sometimes in the violation of the contact connections of the LED strips.
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.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the 5800-A6M88G-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). Repair of the board and replacement of NAND FLASH: TC58NVG1S3HTA00, EEPROM: 24C64, AUDIO: TPA3110D2 microcircuits are made if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by warming up.
If there is no tuning for terrestrial or cable TV channels, you should make sure that the software is correct, as well as that the supply voltages on the terminals of the DVB + SAT tuner match. 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.
Users and owners of TVs need to remember that attempts to self-repair a SUPRA STV-LC42ST660FL00 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
The appearance of the MainBoard 5800-A6M88G-0P10 is shown in the figure below:5800-A6M88G-0P10
External view of the power supply
Main features of SUPRA STV-LC42ST660FL00 device:
Installed matrix (LED panel) LC420DUJ-SGK1.
Matrix control uses the Timing Controller (T-CON) 6870C-0469A.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by an OZ9967 PWM controller. The keys of the ME15N10 type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC42ST660FL00 TV is carried out by the 168P-L3L026-W0 power module, or its analogs using TEA1733 microcircuits.
MainBoard - the main board (motherboard) is a 5800-A6M88G-0P10 module, using CPU chips: PNX85637EB, NAND FLASH: TC58NVG1S3HTA00, EEPROM: 24C64, AUDIO: TPA3110D2 and others.
The DVB + SAT tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC420DUJ-SGK1
Type: a-Si TFT-LCD, CELL
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 927.936x521.964 mm
Surface: Antiglare (Haze 1%), Hard coating (2H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.25% (with Polarizer)
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: TBD
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
SUPRA LED TV STV-LC42ST660FL00 with LC420DUJ-SGK1 LCD, 42 "(107 cm) 16: 9. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 120,000: 1 is achieved by special control operation of LEDs depending on the illumination of areas in the scene.In the production technology of the model's display, LED LED backlighting is used.
There is support for 3D images, 2D to 3D conversion. The capabilities of the TV provide for viewing programs and films in high quality HD at a resolution of 1920x1080 pixels in graphic decomposition at the standard 1080p (Full HD).
STV-LC42ST660FL00 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 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), VGA, HDMI x3, MHL, USB x2, Ethernet (RJ-45), Wi-Fi. 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 digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 1057x682x147 mm.
Attention! The LC420DUJ-SGK1 panel of the SUPRA STV-LC42ST660FL00 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 ........................