Technical description and composition of the MYSTERY MTV-5031LTA2 TV, panel type and applicable modules. The composition of the modules.MYSTERY LED
Model: MTV-5031LTA2
Chassis / Version: MSA6284-ZC01-01
Panel: V500HJ1-PE8
LED driver (backlight): integrated into PSU
PWM LED driver: OB3354QP
Power Supply (PSU): TV5001-ZC02-01
PWM Power: OB2273, FAN7930, OB2263
MOSFET Power: SMK0870, MDF13N50
MainBoard: MSA6284-ZC01-01
IC MainBoard: CPU: MSD6A628VXM, EMMC: THGBMFG6C1LBAIL, DRAM: K4B4G16460
Tuner: MSB102KT
Technical Specifications MTV-5031LTA2
MYSTERY MTV-5031LTA2
General repair guidelines for TV LCD LED
Possible manifestations of defects
- MYSTERY MTV-5031LTA2 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.
With such manifestations, a malfunction is most likely to be detected in the TV5001-ZC02-01 power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (SMK0870, MDF13N50) and rectifier diodes in the converters for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM) OB2273, FAN7930, OB2263, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the 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 motherboard MSA6284-ZC01-01 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 - CPU: MSD6A628VXM, EMMC: THGBMFG6C1LBAIL, DRAM: K4B4G16460 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.
Before changing the tuner MSB102KT, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and checked for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention TV owners! Attempts at self-repair of the MYSTERY MTV-5031LTA2 are not recommended by the manufacturer and can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-5031LTA2, Main: MSA6284-ZC01-01, Panel: V500HJ1-PE8
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TV5001-ZC02-01 Power supply
The appearance of the MainBoard MSA6284-ZC01-01 is shown in the figure below:MSA6284-ZC01-01
MSA6284-ZC01-01 can be used in TVs:
MYSTERY MTV-4331LTA2 (Panel FullHD_CMO216_H1L01), TELEFUNKEN TF-LED48S39T2S (Panel LCS480HN08-8).
The appearance of the power supply
Main features of the MYSTERY MTV-5031LTA2 device:
Installed matrix (LED-panel) V500HJ1-PE8.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OB3354QP PWM controller.
The required supply voltages for all nodes of the MYSTERY MTV-5031LTA2 TV are generated by the TV5001-ZC02-01 power supply module or its analogs using OB2273, FAN7930, OB2263 microchips and power switches of the SMK0870, MDF13N50 type.
MainBoard - the main board (motherboard) is an MSA6284-ZC01-01 module, using CPU chips: MSD6A628VXM, EMMC: THGBMFG6C1LBAIL, DRAM: K4B4G16460 and others.
The MSB102KT tuner provides TV reception and channel tuning.
MYSTERY MTV-5031LTA2 TV with V500HJ1-PE8 LCD, 50 "(127 cm) diagonal size of 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic 5000: 1 contrast is achieved by special control of the LEDs The technology for making the screen of this TV model uses LED LED backlighting.The design and technical capabilities of the TV provide for watching broadcasts and films in high quality HD with a resolution of 1920x1080 pixels in a graphic layout according to standard 108 0p (Full HD).
MTV-5031LTA2 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, MKV, JPEG.
The power of the sound system 20 W (2x10 W) provides 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 V500HJ1-PE8 panel of the MYSTERY MTV-5031LTA2 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.