Technical description and composition of the MYSTERY MTV-4023LW TV, type of panel and applicable modules. The composition of the modules.MYSTERY LED
Model: MTV-4023LW
Chassis / Version: TP.VST59.P83
Panel: CX390DLEDM / T390HVN04.0
LED backlight: 01.JL.CX39061235A3-L, 01.JL.CX39061235A3-R
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
Power Supply (PSU): integrated into MainBoard
PWM Power: LD7536
MOSFET Power: N-FET 600V 7A
MainBoard: TP.VST59.P83
IC MainBoard: Cpu: TSUMV59XU-Z1, SPI Flash: GD25Q32B;
Tuner: CDT-3NP5i1-10
Technical Specifications MTV-4023LW
MYSTERY MTV-4023LW
General repair guidelines for TV LCD LED
TV MYSTERY MTV-4023LW, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the soldered terminals of transformers or heating elements are detected, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
In the absence of any signs of operability, when the MYSTERY MTV-4023LW does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV power module. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as a large electrolytic capacitor of the filter of the rectifier network.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
If the MYSTERY MTV-4023LW TV does not have an image, but there is sound, a malfunction in the backlight circuits of the CX390DLEDM LED panel is likely.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
The TP.VST59.P83 motherboard 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.
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: TSUMV59XU-Z1, SPI Flash: GD25Q32B; 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.
If you suspect a malfunction of the CDT-3NP5i1-10 tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels at the corresponding terminals of the tuner.
Owners and users of the MYSTERY MTV-4023LW television must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TP.VST59.P83-65W18
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-4023LW, Main: TP.VST59.P83, Panel: CX390DLEDM
The appearance of MainBoard TP.VST59.P83 and voltage measurements at the test points are shown in the figure below:TP.VST59.P83
The TP.VST59.P83 motherboard is combined with a power module and is an independent device made on the basis of the TSUMV59Xxx multifunction processor. Repair of such a board must begin by checking the power batteries, as well as the operability of voltage converters and linear stabilizers, necessary to provide power to certain processor nodes, in particular: + 1.2V core power, built-in DDR + 1.8V memory and Stand- by 3.3V. The voltage of the LCD panel 5V or 12V, depending on the type of panel used, must be checked directly on the LVDS connector.
TP.VST59.P83 can be used in TVs:
AKAI LEA-28A08W (Panel ST2751A01-1), ERISSON 39LEN52 (Panel TLV3931-02), ERISSON 32LEN52 (Panel TLV3231-01), FUSION FLTV-32L28B (Panel TH315B051-MD1), FUSION FLTV-39LF28B (Panel V390HJ1-P02), FUSION FLTV-32L41B (Panel DBMS315LK09-C), FUSION FLTV-40LF28B (Panel DBMS400LK01-A), HYUNDAI H-LED32V18 (Panel CX315DLEDM T320XVN02.A ), MYSTERY MTV-4023LW (Panel CX390DLEDM / T390HVN04.0), ROLSEN RL-39D1305F (Panel V390HJ1-P02 Rev. C1), RUBIN RB-32D3U (Panel T320XVN01.0), RUBIN RB-39D3F (Panel CX390DLEDM), SHIVAKI STV-40LED5 (Panel V390HJ1-P01 Rev C1), SUPRA STV-LC3225AWL (Panel TH315B051-MD2), SUPRA STV-LC32T810WL (Panel TC315F3E5-A), SUPRA STV-LC32880WL (Panel HE315GH-E77GM\PW1 ), SUPRA STV-LC2825WL (Panel SM275TC30), SUPRA STV-LC32820WL (Panel TC315FJE1-MD4), SUPRA STV-LC32810WL (Panel TC315F3E5-A), TELEFUNKEN TF-LED32S7 (Panel ST3151A05-5 CX315DLEDM).
Main features of the MYSTERY MTV-4023LW device:
Installed matrix (LED-panel) CX390DLEDM / T390HVN04.0.
To power the backlight LEDs, a converter is used, combined with the main board TP.VST59.P83, controlled by the OB3350CP PWM controller.
The power module is combined with the MainBoard and is designed according to a flyback AC / DC voltage converter using LD7536 microcircuits and power switches of the N-FET 600V 7A type.
MainBoard - the main board (motherboard) is a TP.VST59.P83 module, using Cpu chips: TSUMV59XU-Z1, SPI Flash: GD25Q32B; and others.
The tuner CDT-3NP5i1-10 provides the reception of television programs and tuning to channels.
The MYSTERY MTV-4023LW TV with a CX390DLEDM LCD display, diagonal size 39 "(99 cm) in 16: 9 format. The required brightness of the screen is 260 cd / m² LED backlight LED. The LED panel of this TV is equipped with LED backlight - Edge LED: The design and technical capabilities of the TV include viewing of broadcasts and films in high quality HD with a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. aficheskaya processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, WMA, MPEG4, JPEG.
The power of the acoustic system of sound 20 W (2x10 W) provide 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, 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, 1360x768.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The CX390DLEDM / T390HVN04.0 panel of the MYSTERY MTV-4023LW 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.