Technical description and composition of the MYSTERY MTV-4018LT2 TV, type of panel and applicable modules. The composition of the modules.MYSTERY LED
Model: MTV-4018LT2
Chassis / Version: MSDV3223-ZC01-01
Panel: V390HJ1-P02
LED driver (backlight): TV3901-ZC02-01 (C) P / N: 303C3901063
Power Supply (PSU): TV3205-ZC02-01 (A) P / N: 303C3205061
PWM Power: ICE3B0565J, LD7550BL (6pin)
MainBoard: MSDV3223-ZC01-01
IC MainBoard: 25Q64-104HIP; K4B1G1646G-BCKO
Technical Specifications MTV-4018LT2
MYSTERY MTV-4018LT2
General repair guidelines for TV LCD LED
Any repair usually begins with an external inspection. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. In some cases, faulty elements are visible to the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the MYSTERY MTV-4018LT2 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. In some cases, only the processor power regulator may be faulty. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
Sometimes the MYSTERY MTV-4018LT2 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the LED backlight converter V390HJI-P02, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the operability of the electrolytic capacitors of the filter by supplying the LED driver itself, including the PSU.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the rations of their terminals, as well as the reliability of the connections in the connectors and rations of the terminals.
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 motherboard MSDV3223-ZC01-01 must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - SPI Flash: 25Q64-104HIP; which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
It should be remembered! Attempts to repair the MYSTERY MTV-4018LT2 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-4018LT2, Main: MSDV3223-ZC01-01, Panel: V390HJI-P02
The appearance of the MainBoard MSDV3223-ZC01-01 is shown in the figure below:MSDV3223-ZC01-01
MSDV3223-ZC01-01 can be used in TVs:
JVC LT-39M440 (Panel V390HJ1-P02), MYSTERY MTV-4022LT2 (Panel V390HJ1-P02), MYSTERY MTV-4018LT2 (Panel V390HJ1-P02), MYSTERY MTV-4026LT2 (Panel V400HJ6-PE1), MYSTERY MTV-4028LT2 (Panel V390HJ1-P02).
The appearance of the power supply
Main features of the MYSTERY MTV-4018LT2 device:
Installed matrix (LED panel) V390HJ1-P02.
The LED driver TV3901-ZC02-01 (C) is used to power the backlight LEDs.
The required supply voltages for all nodes of the MYSTERY MTV-4018LT2 television are generated by the TV3205-ZC02-01 power supply module or its analogs using ICE3B0565J, LD7550BL (6pin) microcircuits.
MainBoard - the main board (motherboard) is an MSDV3223-ZC01-01 module, using 25Q64-104HIP chips; K4B1G1646G-BCKO and others.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V390HJ1-P02
Type: a-Si TFT-LCD, CELL
Diagonal size: 39 inch
Resolution: 1920x1080, FHD
Display Mode: MVA, Normally Black, Transmissive
Active Area: 853.92x480.33 mm
Surface: Antiglare (Haze 3.5%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 5.8% (with Polarizer)
Contrast Ratio: 3000: 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-4018LT2 TV with V390HJ1-P02 LCD display, diagonal size 39 "(99 cm) 16: 9 format. The required brightness of the screen 400 cd / m² is provided by LED backlight LED. 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 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). frequency or video signal can be processed in analog 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 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 x2, component, VGA, HDMI x2, USB. 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.
The power consumed by the TV in the operating mode from the network is 90 watts.
Overall dimensions: 906x645x250 mm.
TV Weight: 8.5 kg.
Attention! The V390HJ1-P02 panel of the MYSTERY MTV-4018LT2 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.