Technical description and composition of the MYSTERY MTV-3220LW TV, type of panel and applicable modules. The composition of the modules.MYSTERY LED
Model: MTV-3220LW
Chassis / Version: MSDV3209-ZC01-01 (D)
Panel: V315H4-LE7
MainBoard: MSDV3209-ZC01-01 (D) // MSDV3219-ZC01-01
IC MainBoard: SPI Flash: MX25L6406E;
Tuner: DT58WT-3RB-E
Technical Specifications MTV-3220LW
MYSTERY MTV-3220LW
General repair guidelines for TV LCD LED
Repair of TVs, as well as other devices, it is advisable to start with an external examination. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. Useful tips can include swollen capacitors, ring cracks formed in the soldered terminals, a charred paint layer on the resistors, signs of overheating of the board, and many other external signs that are familiar to experienced repairmen.
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 probability that the power module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of standby power. When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
Power switches in switching 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 cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If there is no image when you turn on the MYSTERY MTV-3220LW, or it appears and immediately disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the V315H4-LE7 panel, or in their power converter.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
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.
On the motherboard MSDV3209-ZC01-01 (D), in case of a malfunction, you should first check the performance of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software).
When repairing an MB board, you need to check its components SPI Flash: MX25L6406E; . Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
If there is no reception of television channels, but the TV works properly from external devices, first of all you need to check the voltage of the tuner DT58WT-3RB-E and update the software.
It should be remembered! Attempts to repair the MYSTERY MTV-3220LW TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-3220LW, Main: MSDV3209-ZC01-01, Panel: V315H4-LE7
The appearance of the MainBoard MSDV3209-ZC01-01 is shown in the figure below:
MainBoard MSDV3209-ZC01-01 uses a multifunctional microprocessor of the type MSD309PX or MSD308PX with an integrated scaler. Two RAM chips W9751G6IB are used as RAM. SPI Flash MX25L6406EMI-12G is made in the SOP-16 (16 pin) package.
It is advisable to start the repair of the motherboard by checking the voltage + 5V standby mode. In the operating mode, it is necessary to check the operability of linear stabilizers and power converters of the processor, memory, panel and other components of the board.MSDV3209-ZC01-01 can be used in TVs:
BBK LEM3281FDT (Panel V315B1-LE9 REV.C1), BBK LEM3285FDTG (Panel V315H4-LE7 REV.C1), BBK LEM1949DT (Panel HT185WX3-100), BBK LEM3248DT (Panel V315B1-LE7 REV.C1), BBK LEM2665FDTG (Panel V260H1-LE8), BBK LEM3249FDT (Panel V315H4-LE8), BBK LEM2449FDT (Panel M236MWF7), BBK LEM3282DT (Panel V315B1-LEA), MYSTERY MTV-4018LW (Panel T390HVN01.0), MYSTERY MTV-4022LW (Panel M390HJ1-P01), MYSTERY MTV-4214LW (Panel T420HW08 V.5 FHD), MYSTERY MTV-3214LW (Panel V315H4-LE2 Rev.C1), MYSTERY MTV-4217LW (Panel T420HW09 V.9 (FHD)), MYSTERY MTV-3220LW (Panel V315H4-LE7).
Main features of the MYSTERY MTV-3220LW device:
Installed matrix (LED-panel) V315H4-LE7.
The required supply voltage for all nodes of the TV MYSTERY MTV-3220LW provides a switching power supply.
MainBoard - the main board (motherboard) is an MSDV3209-ZC01-01 module, using SPI Flash chips: MX25L6406E; and others.
Tuner DT58WT-3RB-E provides the reception of television programs and tuning to channels.
Information from an alternative source:
MYSTERY MTV-3220LW Version V2L07
Panel Type (Matrix): V315H4-LE7 Rev. C1
Motherboard: MSDV3219-ZC01-01, Tuner: DT68WT-3RB-E
T-con: V320HJ1-PE1 Rev. C6 (Not removable)
MYSTERY MTV-3220LW TV with V315H4-LE7 LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required brightness of the screen is 400 cd / m² LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 2000: 1. The LED panel of this TV has end-face LED illumination - Edge LED. The design and technical capabilities of the TV include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution of 1080p (Full HD) standard. 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, MPEG4, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by 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), AV, audio x2, component, SCART, RGB, VGA, HDMI x2, USB. 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: 800x600, 1024x768, 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 90 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The V315H4-LE7 panel of the MYSTERY MTV-3220LW 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.