Technical description and composition of the MYSTERY MTV-4026LT2 TV, type of panel and applicable modules. The composition of the modules.MYSTERY LED
Model: MTV-4026LT2
Chassis / Version: V1N11
Panel: V400HJ6-PE1
T-CON: CM2801C, CM508, US5507P, CM603
LED driver (backlight): with integrated PSU
PWM LED driver: OB3368AP
MOSFET LED driver: MDD1903
Power Supply (PSU): TV3902-ZC02-01 (D) P / N303C3902064
PWM Power: OB5269CP
MainBoard: MSDV3223-ZC01-01
IC MainBoard: 25Q64BSIG, K4B1G1646G-BCKO
Technical Specifications MTV-4026LT2
MYSTERY MTV-4026LT2
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The MYSTERY MTV-4026LT2 TV does not turn on, does not respond to the remote control and control panel buttons, does not blink with any indicators.
With such manifestations, a malfunction is most likely to be detected in the TV3902-ZC02-01 power supply module. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of avalanche and thermal breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode, and in case of short circuit in the power elements of the primary circuit, a mains fuse or a current sensor at the source of the key usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip OB5269CP can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- 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 MSDV3223-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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its 25Q64BSIG, K4B1G1646G-BCKO chips and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-4026LT2 V1N11, Main: MSDV3223-ZC01-01, Panel: V400HJ6-PE1
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.Repair MainBoard
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-4026LT2 device:
Installed matrix (LED-panel) V400HJ6-PE1.
The matrix control uses the Timing Controller (T-CON) CM2801C.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OB3368AP PWM controller. As power elements of the LED driver, keys of the MDD1903 type are used.
The required supply voltages for all nodes of the MYSTERY MTV-4026LT2 television are generated by the -ZC02-01 power supply module or its analogs using OB5269CP microcircuits.
MainBoard - the main board (motherboard) is a module MSDV3223-ZC01-01, using microchips 25Q64BSIG, K4B1G1646G-BCKO and others.
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-4026LT2 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. 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 graphic resolution 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 , MKV, JPEG.
The power of the acoustic system of sound 20 W (2x10 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 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, 1280x1024, 1360x768, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 900x600x200 mm.
TV Weight: 7 kg.
Attention! The MYSTERY MTV-4026LT2 LED TV panel V400HJ6-PE1 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.