Technical description and composition of the MYSTERY MTV-2214LW TV, type of panel and applicable modules. The composition of the modules.MYSTERY LED
Model: MTV-2214LW
Chassis / Version: V4L05
Panel: CLAA215FA10
LED driver (backlight): integrated into Mainboard
PWM LED driver: AP3608EM-G1, AP3039AM-G1
Power Supply (PSU): integrated into Mainboard
PWM Power: OB2273 (PWM SOT23-6)
MainBoard: MSTV2402-ZC01-01
IC MainBoard: CPU: MST6E181VS-LF-Z1, SPI FLASH: MX35L3206E
Tuner: F33WT-3DDR-E
Technical Specifications MTV-2214LW
MYSTERY MTV-2214LW
General repair guidelines for TV LCD LED
It is advisable to start the repair of the MYSTERY MTV-2214LW TV with a careful external examination of both internal and external elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. 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 cases when the MYSTERY MTV-2214LW TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely faulty or there is no power processor on the motherboard (a typical defect of some MYSTERY TVs). In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
In cases where the MYSTERY MTV-2214LW TV has lost its image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the CLAA215FA10 panel). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
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.
On the motherboard MSTV2402-ZC01-01, in the event of a malfunction, you should first check the performance of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: MST6E181VS-LF-Z1, SPI FLASH: MX35L3206E 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).
Before replacing the F33WT-3DDR-E tuner, if there is no tuning for the channels, first you need to check the supply voltage at its terminals, including the power supply of varicaps (30-33V).
Owners of the MTV-2214LW TV are recommended to contact qualified personnel with experience for repair! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-2214LW ch. MSTV2401-ZC01-01, PANEL - CHUNGHWA CLAA215FA10
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-2214LW (V4L05), MSTV2402-ZC01-01, PANEL CLAA215FA10
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 MainBoardThe 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.
MSTV2402-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-2214LW device:
Installed matrix (LED-panel) CLAA215FA10.
An integrated LED driver is used to power the backlight LEDs, it is controlled by the AP3608EM-G1, AP3039AM-G1 PWM controller.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using OB2273 microcircuits (PWM SOT23-6).
MainBoard - the main board (motherboard) is an MSTV2402-ZC01-01 module, using CPU chips: MST6E181VS-LF-Z1, SPI FLASH: MX35L3206E and others.
The F33WT-3DDR-E tuner provides TV reception and channel tuning.
MYSTERY MTV-2214LW TV with CLAA215FA10 LCD display, diagonal size 22 "(56 cm) 16: 9 format. The required brightness of the screen is 250 cd / m² LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 1000: 1. The LED-panel of this TV has an end LED backlight - Edge LED.The TV design and technical features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution of 1080p (Full HD) standard. frequency or video signal can be processed by analog systems, PAL, SECAM, NTSC Image processing and generation of the digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats:.. MP3, DivX, 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, component, SCART, VGA, HDMI x2, USB. 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: 800x600, 1024x768.
The power consumed by the TV in the operating mode from the network is 40 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The CLAA215FA10 panel of the MYSTERY MTV-2214LW 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.
