Technical description and composition of the SUPRA STV-LC42660FL00 TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC42660FL00
Chassis / Version: V1M02 (5800-A8M480-0P20)
Panel: LC420EUN (SE) (F1)
LED backlight: 6920L-0001C, 6922L-0016A
T-CON: 6870C-0401C
LED driver (backlight): 6917L-0084A 3PHCC20002B-H PCLF-D104
PWM LED driver: SW5516
Power Supply (PSU): 5800-P42EWB-W020 (168P-P42EWB-W0)
PWM Power: FSFR1700XSL, OB5223AP, OB6572CP (PFC)
MainBoard: 5800-A8M480-0P20 2012-08-17 Ver. 00.08 // 5800-A8M470-0P30 // 5800-A8M470-0P10
IC MainBoard: Cpu: MST6E182VG-LF-Z, Spi Flash: 25Q32
Tuner: ET-9Z2E-CF106H
STV-LC42660FL00 Specifications
SUPRA STV-LC42660FL00
General recommendations for TV LCD LED repair
Possible manifestations of defects
- SUPRA STV-LC42660FL00 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 remote control and control buttons.
Usually with similar manifestations, the defect is caused by faulty components in the main power module 5800-P42EWB-W020. It is necessary to measure its output supply voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse usually breaks.
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) FSFR1700XSL, OB5223, OB6572, 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 image, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.
In some of these cases, the malfunction is caused by the lack of display backlighting. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
To check the health of the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED separately with a simple Chinese multimeter (powered by 9 volts) in the P-N transition test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black one to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. The serviceability of the PN junction of the Zener diode indirectly indicates the serviceability of the LED-a
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the 5800-A8M480-0P20 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). Sometimes the elements of the MainBoard board need to be checked or replaced (if necessary) - Cpu: MST6E182VG-LF-Z, Spi Flash: 25Q32. In cases where a BGA processor is used, its malfunction is usually detected by the local warm-up method.
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 terminals of the ET-9Z2E-CF106H 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.
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 -----------> SUPRA STV-LC42660FL00, Main: 5800-A8M470-OP30, Panel: LC420EU
To reduce the backlight current in LED drivers with a SW5516 controller, you need to proportionally increase the total resistance of the resistors connected between pin 28 of SW5516 and the case, for example, by removing one of the resistors
The MainBoard is shown in the figure below:5800-A8M480-0P20
5800-A8M480-0P20 can be used in TVs:
AIWA 32LE6110 (Panel T320HVN01.V2), SUPRA STV-LC39660FL (Panel V390HJ1 rev.c1 SEL390V7-S00D ), SUPRA STV-LC32660FL (Panel T320HVN01.V2), SUPRA STV-LC42660FL00 (Panel LC420EUN (SE)(F1)).
Main features of SUPRA STV-LC42660FL00 device:
Installed matrix (LED panel) LC420EUN (SE) (F1).
Matrix control uses a Timing Controller (T-CON) 6870C-0401C.
The LED driver 6917L-0084A is used to power the backlight LEDs, it is controlled by the SW5516 PWM controller.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC42660FL00 TV is carried out by the 5800-P42EWB-W020 power module, or its analogs using FSFR1700XSL, OB5223AP, OB6572CP (PFC) microcircuits.
MainBoard - the main board (motherboard) is a 5800-A8M480-0P20 module, using Cpu chips: MST6E182VG-LF-Z, Spi Flash: 25Q32 and others.
Tuner ET-9Z2E-CF106H provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC420EUN-SEF1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 10%), Hard coating (2H)
Brightness: 360 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
LED TV SUPRA STV-LC42660FL00 with LCD display LC420EUN, 42 "(107 cm) diagonal 16: 9. The required screen brightness of 360 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 100,000: 1 is achieved by special LED control depending on the illumination of the areas in the scene.This model uses an LED-panel with an edge arrangement of backlight LEDs - Edge LED.
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). 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, 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, audio x2, component, VGA, HDMI x3, USB x2. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
Overall dimensions: 1122x690x162 mm.
TV weight: 18.9 kg.
Attention! The LC420EUN (SE) (F1) panel of the SUPRA STV-LC42660FL00 LED TV is an expensive and unreliable component.
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 ................................ ...................