Technical description and composition of the MYSTERY MTV-4031LTA2 TV, panel type and applicable modules. The composition of the modules.MYSTERY LED
Model: MTV-4031LTA2
Panel: V400HJ6-PE1
LED driver (backlight): integrated into PSU
PWM LED driver: OB3368AP
Power Supply (PSU): TV3902-ZC02-01
PWM Power: OB5269
MainBoard: MS63082-ZC01-01 & IP4000-ZC01-01 (A)
IC MainBoard: SLC Nand: MX30LF1G08AA-TI; IP4000-ZC01-01 (A): CPU: AML8726-MX, MCL Nand: 29F64G08CBABA SPI: 25Q32BSIG, DDR3: NT5CB256M16CP-DI * 2
Tuner: LHD
Technical Specifications MTV-4031LTA2
MYSTERY MTV-4031LTA2
General repair guidelines for TV LCD LED
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the TV3902-ZC02-01 power supply module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of standby power. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
Power switches in pulsed power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the OB5269 PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If the image appears and immediately disappears when the TV is turned on, or it is initially absent when it is turned on, but the sound has other functions, there is a high probability of a malfunction of the display backlight LEDs or the LED driver (power converter for the panel backlight unit V400HJ6-PE1).
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
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.
In cases of attempts to repair the motherboard MS63082-ZC01-01 + IP4000-ZC01-01 (A), it is necessary to check the operation of linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed with local heating.
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the SLC Nand elements: MX30LF1G08AA-TI; IP4000-ZC01-01 (A): CPU: AML8726-MX, MCL Nand: 29F64G08CBABA SPI: 25Q32BSIG, DDR3: NT5CB256M16CP-DI * 2. BGA chip malfunctions are usually easy to detect by warming up.
If there is no reception of television channels, but the TV works properly from external devices, first of all you need to check the power supply voltage of the LHD tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, remind users! Attempts to self-repair a TV MYSTERY MTV-4031LTA2 without the appropriate qualifications and experience can lead to its complete non-repairability!
To reduce the backlight current in LED drivers with the OB3368AP controller, the total resistance of the resistors from the 17 ISET pin to the housing should be proportionally increased. The current in milliamperes in each channel is determined from the calculation of 4000 * 1.2 / Rset, where Rset is the resistance from the output of 17 ISET to the housing in kilo-ohms.
The appearance of the MainBoard MS63082-ZC01-01 is shown in the figure below:MS63082-ZC01-01
MS63082-ZC01-01 can be used in TVs:
MYSTERY MTV-4829LTA2 (Panel LSC480HN02-G), MYSTERY MTV-4031LTA2 (Panel V400HJ6-PE1).
The appearance of the power supply
Main features of the MYSTERY MTV-4031LTA2 device:
Installed matrix (LED-panel) V400HJ6-PE1.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OB3368AP PWM controller.
The necessary supply voltages for all nodes of the MYSTERY MTV-4031LTA2 TV are generated by the TV3902-ZC02-01 power supply module, or its analogs using OB5269 microcircuits.
MainBoard - the main board (motherboard) is an MS63082-ZC01-01 module, using SLC Nand microcircuits: MX30LF1G08AA-TI; IP4000-ZC01-01 (A): CPU: AML8726-MX, MCL Nand: 29F64G08CBABA SPI: 25Q32BSIG, DDR3: NT5CB256M16CP-DI * 2 and others.
The LHD tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: INNOLUX
Model: V400HJ6-PE1 Rev. C2
Type: a-Si TFT-LCD, CELL
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: MVA, Normally Black, Transmissive
Active Area: 878.112x485.352 mm
Surface: Antiglare (Haze 1%)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.0% (with Polarizer)
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
MYSTERY MTV-4031LTA2 TV with V400HJ6-PE1 LCD, 40 "(102 cm) diagonal, 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 2000: 1. LED TV backlighting is implemented in the manufacturing technology of the screen of this TV model. 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 graphic layout according to the standard 1080p (Full HD )
MTV-4031LTA2 TV has built-in SMART Software and pre-installed Android Operating System. 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, WMA, MPEG4, Xvid, DivX, MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by 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 x2, component, VGA, HDMI x2, USB x2, Ethernet (RJ-45), Wi-Fi 802.11n. 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, DVB-T2 standards.
Attention! The panel V400HJ6-PE1 of the MYSTERY MTV-4031LTA2 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.