Technical description and composition of the MYSTERY MTV-2221LD TV, type of panel and applicable modules. The composition of the modules.MYSTERY LED
Model: MTV-2221LD
Chassis / Version: MSTV2407-ZC01-01
Panel: M215HGE-L10 REV.C1
LED driver (backlight): integrated into Mainboard
PWM LED driver: AP3608EM-G1, AP3039AM
Power Supply (PSU): integrated into Mainboard
PWM Power: PWM SOT23-6
MainBoard: MSTV2407-ZC01-01
IC MainBoard: CPU: MST6E181VS-LF-Z1, SPI Flash: 25FL032KIF, X5DV330, YD1517P
Tuner: F33WT-3DDR-E
Technical Specifications MTV-2221LD
MYSTERY MTV-2221LD
General repair guidelines for TV LCD LED
Repair of electronic devices, including the MYSTERY MTV-2221LD TV, it is advisable to start with an external examination of its external and internal elements. Based on visible external changes in the state of the components, it is often possible to determine the direction of the troubleshooting before making the necessary measurements. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
In the absence of any signs of operability, when the MYSTERY MTV-2221LD 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. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
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-2221LD TV does not have an image, but there is sound, a malfunction in the backlight circuits of the LED panel M215HGE-L10 REV.C1 is likely.
In case of breaks in the LED circuit, a complete disassembly of the panel is required, the LEDs are checked for an open circuit, 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.
On the MSTV2402-ZC01-01 motherboard, 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).
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 CPU chips: MST6E181VS-LF-Z1; SPI Flash: 25FL032KIF; and other possible malfunctioning components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the F33WT-3DDR-E tuner, if it is not possible to tune to television channels, you should make sure that there are supply voltages that must be measured at the corresponding tuner pins and check the software for correctness.
Once again, remind users! Attempts to self-repair a TV MYSTERY MTV-2221LD without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-2221LD, Main: MSTV2402-ZC01-01, Panel: M215HGE-L10 REV.C1
To reduce the backlight current in LED drivers with the AP3039AM controller and the AP3608EM terminal stage (AP3039AM-G1 & AP3608EM-G1), the AP3608EM (AP3608E) microcircuit should proportionally increase the resistor from terminal 14 (ISET) to the housing. The maximum current in each channel (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 1.194V / Rset. In channels connected in parallel, the currents add up.Repair MainBoard
The appearance of the MainBoard MSTV2407-ZC01-01 is shown in the figure below:
MSTV2407-ZC01-01
MSTV2407-ZC01-01 motherboard is combined with a power module. The processor is MST6E182VG, or MST6E181VG, made using BGA technology. Repair of the power module is carried out according to conventional technology, starting with checking its power elements. The following is a functional check of the converters for the processor power: + 1.3V, + 1.8V, 3.3V, based on SY8008B PWM controllers. The power supply of the built-in DDR 2.5V is generated from a 3.3V source using the P-N junction of the 1N4001 diode (3.3V-0.8V = 2.5V). Standby mode is organized from the linear stabilizer series 1117-3V3. The LCD panel is powered by either 5V or 12V, depending on the type of panel used.
MSTV2407-ZC01-01 can be used in TVs:
MYSTERY MTV-2214LW (Panel CLAA215FA10), MYSTERY MTV-2213LW (Panel M215HGE-L10), MYSTERY MTV-2221LD (Panel M215HGE-L10 REV.C1).
Main features of the MYSTERY MTV-2221LD device:
Installed matrix (LED panel) M215HGE-L10 REV.C1.
The LED driver integrated is used to power the backlight LEDs, it is controlled by the AP3608EM-G1, AP3039AM PWM controller.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is an MSTV2402-ZC01-01 module, using CPU chips: MST6E181VS-LF-Z1, SPI Flash: 25FL032KIF, X5DV330, YD1517P and others.
The F33WT-3DDR-E tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: M215HGE-L10
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
The MYSTERY MTV-2221LD TV with an M215HGE-L10 LCD, a diagonal size of 22 "(56 cm), is a 16: 9 aspect ratio. The required screen brightness of 250 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 1000: 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 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, VideoCD, SVCD , JPEG.
The power of the acoustic system of sound 6 W (2x3 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, S-Video, component, SCART, RGB, 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.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The M215HGE-L10 REV.C1 panel of the MYSTERY MTV-2221LD LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the screen surface 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.