Technical description and composition of the TV TCL F50S3803, type of panel and applicable modules. The composition of the modules.TCL LED
Model: F50S3803
Chassis / Version: 40MT31SS-MAC2HG
Panel: V500HJ1-PE8
T-CON: V500HJ1-XCME1
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9976GN
Power Supply (PSU): PW210AA
MainBoard: 40-MT31SS-MAC2HG
IC MainBoard: SPI Flash: W25Q64BV, AUDIO: TAS5707
Tuner: DT21CN-2-E
Technical Specifications F50S3803
TCL F50S3803
General repair guidelines for TV LCD LED
Possible manifestations of defects
- TCL F50S3803 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Often in such cases, the PW210AA power module is faulty. 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 PN semiconductor junctions.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 40-MT31SS-MAC2HG motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SPI Flash: W25Q64BV, AUDIO: TAS5707 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If you suspect a malfunction of the DT21CN-2-E tuner, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Once again, remind users! Attempts to independently repair the TCL F50S3803 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> TCL F50S3803, Main: 40-MT31SS-MAC2HG, Panel: V500HJ1-PE8
The appearance of the MainBoard 40-MT31SS-MAC2HG is shown in the figure below:40-MT31SS-MAC2HG
The appearance of the power supply
Main features of the TCL F50S3803 device:
Installed matrix (LED-panel) V500HJ1-PE8.
The matrix control uses the Timing Controller (T-CON) V500HJ1-XCME1.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9976GN PWM controller.
The formation of the necessary supply voltages for all nodes of the TCL F50S3803 TV is carried out by the PW210AA power module, or its analogues.
MainBoard - the main board (motherboard) is a 40-MT31SS-MAC2HG module using SPI Flash chips: W25Q64BV, AUDIO: TAS5707 and others.
The DT21CN-2-E tuner provides TV reception and channel tuning.
TCL F50S3803 TV with V500HJ1-PE8 LCD display, diagonal size 50 "(127 cm) 16: 9 format. The brightness of the screen, declared by the manufacturer, 270 cd / m² is realized by LED backlighting. The LED technology in the manufacturing technology of the screen of this TV model is LED The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analog x PAL, SECAM, NTSC systems. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The power of the sound system 32 W (2x16 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), SCART, HDMI x2, MHL, USB x2, Ethernet (RJ-45). An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C standards.
The power consumed by the TV in the operating mode from the network is 120 watts.
Overall dimensions: with stand 1130x702x215 mm, without stand 1130x795x145 mm.
The mass of the TV: 11.8 kg.
Attention! The V500HJ1-PE8 panel of the TCL F50S3803 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.
