Technical description and composition of the MYSTERY MTV-4022LT2 TV, type of panel and applicable modules. The composition of the modules.MYSTERY LED
Model: MTV-4022LT2
Chassis / Version: MSDV3223-ZC01-01
Panel: V390HJ1-P02
Power Supply (PSU): AY075D-4SF04
MainBoard: MSDV3223-ZC01-01 (M13 / G43200 / 12)
IC MainBoard: cFeon 25Q64-104HIP, K4B1G1646G-BCKO
Technical Specifications MTV-4022LT2
MYSTERY MTV-4022LT2
General repair guidelines for TV LCD LED
Repair of electronic devices, including the MYSTERY MTV-4022LT2 TV, it is advisable to start with an external examination of its external and internal elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In the case when the MTV-4022LT2 does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, the AY075D-4SF04 power supply module is probably faulty in this case. If it is serviceable under such manifestations, it is necessary to check the power supply stabilizer (converter) of the processor on the motherboard.When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the MYSTERY MTV-4022LT2 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the V390HJI-P02 panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
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.
In cases of attempts to repair the motherboard MSDV3223-ZC01-01 (M13 / G43200 / 12), it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - Flash cFeon 25Q64-104HIP with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Remember! Attempts to self-repair by users of the MYSTERY MTV-4022LT2 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-4022LT2, Main: MSDV3223-ZC01-01(M13/G43200/12), Panel: V390HJI-P02
In case of failures in Winbond's SPI FLASH software, we recommend that you replace the chip itself with a new one. Sometimes Winbond microcircuits can recover for some time after high-temperature exposure, for example, heating with a soldering station or a lighter, which is sometimes enough to read its contents.
Repair MainBoardThe 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).
Main features of the MYSTERY MTV-4022LT2 device:
Installed matrix (LED panel) V390HJ1-P02.
The formation of the necessary supply voltages for all nodes of the MYSTERY MTV-4022LT2 TV is carried out by the power module AY075D-4SF04, or its analogues.
MainBoard - the main board (motherboard) is a module MSDV3223-ZC01-01, using microchips cFeon 25Q64-104HIP, 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-4022LT2 TV with V390HJ1-P02 LCD display, diagonal size 39 "(99 cm) in 16: 9 format. The LED-panel of this TV is equipped with LED end-lighting - 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 graphic decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analogue systems PAL, SECAM. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 57 6p, 720p, 1080i, 1080p Supported media file formats: MP3, WMA, MPEG4, 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, SCART, RGB, VGA, HDMI x3, 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.
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 70 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The panel V390HJ1-P02 of the MYSTERY MTV-4022LT2 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.
