Technical description and composition of the SUPRA STV-LC42ST670FL00 TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC42ST670FL00
Chassis / Version: V1N10
Panel: LC420DUJ-SGK1
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9967
MOSFET LED driver: ME15N10
Power Supply (PSU): 168P-L3L026-W0
PWM Power: TEA1733
MainBoard: 5800-A6M88G-0P10
IC MainBoard: NAND FLASH: TC58NVG1S3HTA00, EEPROM: 24C64, AUDIO: TPA3110D2
Tuner: CP + SAT
STV-LC42ST670FL00 Specifications
SUPRA STV-LC42ST670FL00
General recommendations for TV LCD LED repair
Possible manifestations of defects
- SUPRA STV-LC42ST670FL00 does not turn on, indicators on the front panel do not light or flash. The TV does not respond to control buttons and the remote control.
Often in such cases, the power module 168P-L3L026-W0 is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for possible partial or complete breakdown.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks 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) TEA1733, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with a known good one.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
As a rule, in such cases there is no display backlight. Most often, the reason for this is a break in the LEDs, or poor contact in the connectors of the brackets, less often the LED driver may be faulty.
When trying to detect a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The TV does not turn on, the indicator signals standby or operating mode, or blinks.
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). Complex repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the NAND FLASH elements: TC58NVG1S3HTA00, EEPROM: 24C64, AUDIO: TPA3110D2. Malfunctions in BGA chips are usually easy to detect by warm-up.
In cases where 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 CP + SAT tuner outputs 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.
Once again, we remind TV users: do not attempt to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the field of electronic repair.
DOWNLOAD FIRMWARE FOR SPI FLASH --EEPROM---------> SUPRA STV-LC42ST670FL00 V1N10, Main: 5800-A6M88G-0P10, Panel: LC420DUJ-SGK1
The appearance of the MainBoard 5800-A6M88G-0P10 is shown in the figure below:5800-A6M88G-0P10
External view of the power supply
168P-L3L026-W0:
168P-L3L026-W0
Main features of SUPRA STV-LC42ST670FL00 device:
Installed matrix (LED panel) LC420DUJ-SGK1.
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-LC42ST670FL00 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 NAND FLASH chips: TC58NVG1S3HTA00, EEPROM: 24C64, AUDIO: TPA3110D2 and others.
The CP + SAT tuner provides TV reception and channel tuning.
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-LC42ST670FL00 with LCD display LC420DUJ-SGK1, 42 "(107 cm) 16: 9. 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 using passive polarization technology. 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-LC42ST670FL00 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.
An external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), audio x2, 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, 1360x768. The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
Overall dimensions: 1057x682x147 mm.
Attention! The LC420DUJ-SGK1 panel of the SUPRA STV-LC42ST670FL00 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 ..................