Technical description and composition of the TCL 46V7300 TV, panel type and applicable modules. The composition of the modules.TCL LED
Model: 46V7300
Chassis / Version: 40-MS2800-MAD2HG
Panel: LTA460HQ20
LED backlight: 2012SGS46 7030L 64 REV1.0
T-CON: SSL460 3E1C
LED driver (backlight): SQ60PB_MB34C4LV0.1
Power Supply (PSU): PE421C5 40-E421C6-PWC1XG
PWM Power: FSL206MR, FAN7930C, FSFR1700XS
MOSFET Power: K12A50D
MainBoard: 40-MS2800-MAD2HG
IC MainBoard: SPI Flash: F16-100H
Tuner: F33WT-3DD-E
Technical Specifications L46V7300F3DE
TCL 46V7300
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The TCL 46V7300 does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
Most likely in this case, the main switching power supply (IIPS) PE421C5 is faulty. It is necessary to measure its output supply voltage, and in case of their absence, check the operability of the power switches (K12A50D) of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in 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 at the source of the key.
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 FSL206MR, FAN7930C, FSFR1700XS, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it reacts to the remote control, channels are switched. In some cases, the image appears when you turn on and immediately disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 40-MS2800-MAD2HG 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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its SPI Flash chips: F16-100H and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before replacing the F33WT-3DD-E tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Once again, remind users! Attempts to independently repair the TCL 46V7300 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> TCL 46V7300, Main: 40-MS2800-MAD2HG, Panel: LTA460HQ20
The appearance of the MainBoard 40-MS2800-MAD2HG is shown in the figure below:40-MS2800-MAD2HG
The appearance of the power supply
Main features of the TCL 46V7300 device:
Installed matrix (LED-panel) LTA460HQ20.
The matrix management uses the Timing Controller (T-CON) SSL460.
The LED driver SQ60PB_MB34C4LV0.1 is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the TCL 46V7300 TV are generated by the PE421C5 power module or its analogs using FSL206MR, FAN7930C, FSFR1700XS microcircuits and K12A50D type power switches.
MainBoard - the main board (motherboard) is a 40-MS2800-MAD2HG module, using SPI Flash chips: F16-100H and others.
The F33WT-3DD-E tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA460HQ20-C01
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Display Mode: SVA, Normally Black, Transmissive
Active Area: 1018.08x572.67 mm
Surface: Glare (Haze 0%)
Brightness: 400 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 1.07B (8-bit + Dithering), CIE1931 70%
Response Time: 6 (G to G)
Frequency: 120Hz (60Hz Input)
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
TCL L46V7300F3DE TV with a 46 "(117 cm) diagonal LCD display, 16: 9 format. The brightness of the screen declared by the manufacturer, 400 cd / m², is realized by LED backlighting. 24000: 1 dynamic contrast is achieved by special control of the LEDs depending on In the LCD panel of this TV, end LED backlighting is implemented - Edge LED.
There is support for 3D images with active (shutter) technology for separating the right and left channels. The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD).
The L46V7300F3DE is equipped with SMART software, embedded applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, JPEG.
The power of the sound system 16 W (2x8 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, component, VGA, HDMI x4, USB x2. 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.
The digital tuner is capable of receiving television channels in DVB-T MPEG4 standards.
The power consumed by the TV in the operating mode from the network is 135 watts.
Overall dimensions: with stand 1058x678x246 mm, without stand 1058x632x56 mm.
The mass of the TV: 17 kg.
Attention! The panel of the TCL L46V7300F3DE 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.
