REPAIR / SERVICING TV MYSTERY MTV-4028LT2

Technical description and composition of the MYSTERY MTV-4028LT2 TV, type of panel and applicable modules. The composition of the modules.
MYSTERY LED
Model: MTV-4028LT2
Panel: V390HJ1-P02
T-CON: V390HJ1-XC01; CM2801B, CM501
LED driver (backlight): integrated into PSU
PWM LED driver: OB2263, AP3616M28-G1
MOSFET LED driver: MDF0765
Power Supply (PSU): TV4205-ZC02-01
PWM Power: FAN7930 (PFC), OB2273
MOSFET Power: FDPF18N50
MainBoard: MSDV3223-ZC01-01
IC MainBoard: 25Q64-104HIP; K4B1G1646G-BCKO
Tuner: NoName
Control: IR: T3210-ZC25-03 (B)
Technical Specifications MTV-4028LT2
MYSTERY MTV-4028LT2
General repair guidelines for TV LCD LED
Possible malfunctions
- The MYSTERY MTV-4028LT2 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In such cases, the malfunction should be sought first in the TV4205-ZC02-01 power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (FDPF18N50) and rectifier diodes in the converters for a short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers FAN7930 (PFC), OB2273, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
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). If it is not possible to replace the MB (SSB) board, you must check the health of its elements - 25Q64-104HIP; K4B1G1646G-BCKO. Defective components should be replaced.
In cases where there is no tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the outputs of the NoName tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.

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-4028LT2 , Main: MSDV3223-ZC01-01, Panel: V390HJ1-P02

 To reduce the backlight current in LED drivers with the AP3616M28-G1 terminal stage, the total resistance of the resistors from terminal 22 (ISET AP3616M28) to the housing should be proportionally increased. The maximum current in each of the 16 channels is 75 mA. To increase the current in the diodes, the channels are connected in parallel. The current in milliamperes in each channel is determined from the calculation of 1560 * 1.194 / Rset, where Rset is the resistance from the ISET output 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-4028LT2 device:
Installed matrix (LED panel) V390HJ1-P02.
The matrix control uses the Timing Controller (T-CON) V390HJ1-XC01 ;.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the OB2263 PWM controller, AP3616M28-G1. As power elements of the LED driver, keys of the MDF0765 type are used.
The necessary supply voltages for all nodes of the MYSTERY MTV-4028LT2 television are generated by the TV4205-ZC02-01 power supply module or its analogs using FAN7930 (PFC), OB2273 microcircuits and FDPF18N50 type power switches.
MainBoard - the main board (motherboard) is an MSDV3223-ZC01-01 module, using 25Q64-104HIP chips; K4B1G1646G-BCKO and others.
The NoName tuner provides television reception and channel tuning.
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-4028LT2 TV with V390HJ1-P02 LCD display, diagonal size 39 "(99 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. Edge LED backlighting is implemented in the LED panel of this TV - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems . Emah PAL, SECAM, NTSC Image 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, 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.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The V390HJ1-P02 panel of the MYSTERY MTV-4028LT2 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.

REPAIR / SERVICING TV MYSTERY MTV-4027LT2

Technical description and composition of the MYSTERY MTV-4027LT2 TV, type of panel and applicable modules. The composition of the modules.
MYSTERY LED
Model: MTV-4027LT2
Chassis / Version: MT31LB
Panel: LVF390CMOT E8 V9
LED driver (backlight): integrated into PSU
PWM LED driver: MP3394S
MOSFET LED driver: APM1105N, AOD442
Power Supply (PSU): SHG3206A-101H
PWM Power: LD7750RGR, MC34063A
MainBoard: 40-T31TOT-MAB2HG / MT31LB
IC MainBoard: CPU: MT5531NDNT, SPI FLASH W25Q64
Tuner: RF221ZN
Technical Specifications MTV-4027LT2
MYSTERY MTV-4027LT2
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The MYSTERY MTV-4027LT2 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In such cases, the fault should be sought first in the SHG3206A-101H power supply module. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, it is necessary to check the serviceability of power switches and rectifier diodes for possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers LD7750RGR, MC34063A, in the absence of visible damage or frank fault between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 40-T31TOT-MAB2HG motherboard 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 some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU: MT5531NDNT, SPI FLASH W25Q64 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
The malfunction of the RF221ZN tuner is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.

Attention TV owners! Attempts at self-repair of the MYSTERY MTV-4027LT2 are not recommended by the manufacturer and can lead to serious negative consequences!

SCHEMATIC DIAGRAM  / SERVICE MANUAL  psu  ------------------>    SHG3206A-101H Power Supply

 

TV LED   IC  MP3394/MPS3394S LED Driver Diagnostics Throubleshooting

 

The earlier MP3394 was replaced by MPS3394S, which is an upgraded version of the same IC, and found in the 17IPS20 power supply board. It is the main heart of the backlighting LED drive and the failure of this IC can cause the TV not to start. This is a voltage step-up IC that takes 5-V to 28-V at its input pin 15 (Vin) and raises it to drive four independent strings of LEDs. It also performs other functions such as voltage regulation between the LED strings, and provides a dimming facility using pulse-width modulation (PWM). An important aspect of this IC is that it has built-in open and short LED protection circuitry. It is also able to sense the current and voltage of the LED matrix load and determine abnormal conditions. That means that if all the LEDs in the matrix go open or short, it will prevent the television from switching ON.
The IC has internal control logic that produces the GATE signal to drive an external MOSFET transistor. This is the transistor that is switched against an inductor to step-up the voltage, and the gate signal is produced only when the internal control logic detects normal conditions. It is able to determine normal/abnormal conditions through internal comparators, and one such is the LED Over-Voltage Protection (LED OVP) comparator that provides Short String Protection (SSP).

 

 

When the TV is switched ON, this IC is enabled through pin 2, by a voltage greater than 1.8-V. It first checks the circuit configuration, and then checks the over-voltage protection signal at (pin 12) to determine if the rectifier diode is open and whether the booster MOSFET (driven by the GATE signal) is short to ground. If the OVP voltage at pin 12 is lower than 70-mV (may be different for other board versions), then it disables itself and the TV will not start.
On the 17IPS20 board, the GATE signal is known as GATE_LED, which drives a bi-polar junction transistor (BJT) Q500 (BC858B). This transistor then drives Q502/Q503 MOSFET booster group of transistors to step-up the voltage (shown in the following pages of this article). In this circuit configuration the inductance coils are L500 and L501. The high voltage produced then goes into a group of rectifier diodes D503 and D504 producing a positive DC voltage for the LEDs. The over voltage protection signal is known as OVP_LED. Whilst all the LED strings take their power from this positive voltage source, they all have separate independent drain pins through the MPS3394S controller IC.
There are also other parameters to consider such as Under-Voltage Lock-Out (UVLO), which is determined by measuring the rising-edge of Vin. This parameter has to be between 3.5-V and 4.4-V, with 3.9-V being the typical value. It is a very clever IC as it can also detect open and short LED strings in the backlight array.

 

 Although this diagnostic cannot tell you the condition of each individual diode, it can indicate the condition of each string of diodes in the backlight matrix. The MPS3394S IC (SOIC16 package) drives four separate strings of LEDs through dedicated open drain output pins. LED string 1 is driven by pin 11, LED string 2 by pin 10, LED string 3 by pin 9, and LED string 4 by pin 8. It also monitors the voltages at these pins so that if there was a shorted LED in one of the strings then it would disconnect that string. If the voltage at any of these pins is greater than 6.1-V, then this condition triggers the short circuit protection mechanism for disconnecting the string at that pin. It is also possible to determine an open string, and in this case, this condition is detected when the pin voltage is lower than 196-mV.
Interestingly, this IC is designed such that it will always try to light at least one string if it is working. The only time when the step-up converter shuts-down completely is if all the strings were either open, or short. Therefore, before you rush off to eBay to buy a new chip, measure the voltages at these pins to make sure that the diodes are not faulty. Otherwise, you will end up wasting a lot of time and money!

 To reduce the backlight current in LED drivers with the MP3394S (MP3394) controller, increase the resistance of the resistor from pin 6 (ISET) to the chassis. The maximum current in each channel (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 790 * 1.23V / (Rset + 0.4).

Repair MainBoard
The appearance of the MainBoard 40-T31TOT-MAB2HG is shown in the figure below:
40-T31TOT-MAB2HG
40-T31TOT-MAB2HG can be used in TVs:
ERISSON 32LET40 (Panel LVW320CSOT E45 V11 T8-32T3510-LPM8), ERISSON 28LET40 (Panel LVW280CSOT E19 V2), FUSION FLTV-24T25 (Panel LVW240CMOT E12 V6), MYSTERY MTV-3227LT2 (Panel LVW320CSOT E45 V11 720p HD 1366x768), MYSTERY MTV-4225LT2 (Panel LVF420CMOT - E18.V1), SUPRA STV-LC32T662WL (Panel LWV320CSOT E45 V16 (T8-32T3520-LPM10)).
The appearance of the power supply
Main features of the MYSTERY MTV-4027LT2 device:
Installed matrix (LED-panel) LVF390CMOT E8 V9.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the MP3394S PWM controller. As power elements of the LED driver, keys of the type APM1105N, AOD442 are used.
The necessary supply voltages for all nodes of the MYSTERY MTV-4027LT2 TV are generated by the SHG3206A-101H power supply module or its analogs using LD7750RGR, MC34063A microcircuits.
MainBoard - the main board (motherboard) is a 40-T31TOT-MAB2HG module, using CPU chips: MT5531NDNT, SPI FLASH W25Q64 and others.
The RF221ZN tuner provides television reception and channel tuning.
The MYSTERY MTV-4027LT2 TV with an LVF390CMOT LCD display, diagonal size 39 "(99 cm) in 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 3000: 1. The LED screen technology is implemented in the manufacturing technology of the screen of this TV model.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 graphical decomposition according to the standard 1080p (Full HD). The input high-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, MKV, Jpeg.
The power of the sound system 10 W (2x5 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), component, VGA, HDMI x2, MHL, 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: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-T2 standards.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The LVF390CMOT E8 V9 panel of the MYSTERY MTV-4027LT2 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.

REPAIR / SERVICING TV MYSTERY MTV-4026LT2

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.

REPAIR / SERVICING TV MYSTERY MTV-4025LT2

Technical description and composition of the MYSTERY MTV-4025LT2 TV, type of panel and applicable modules. The composition of the modules.
MYSTERY LED
Model: MTV-4025LT2
Chassis / Version: TP.S512.PB83
Panel: CX400DLEDM // V400HJ6_PE1
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN510P
MOSFET LED driver: AOD4454
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: TP.S512.PB83
IC MainBoard: CPU: S2T512, SPI Flash: GD25Q64B, RT9108NB
Tuner: R840 XF-3SDT-H
Technical Specifications MTV-4025LW
MYSTERY MTV-4025LT2
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The MYSTERY MTV-4025LT2 TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
In this case, first of all, you should check the operability of the main power source - AC / DC network voltage converter, all of whose elements are located on the MainBoard TP.S512.PB83 board. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) PWM SOT23-6, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
Usually in such cases, a malfunction is detected in the backlight nodes 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 health in the LED circuit it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the TP.S512.PB83 motherboard should be started by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). Board repair and replacement of CPU chips: S2T512, SPI Flash: GD25Q64B, RT9108NB are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the tuner R840 XF-3SDT-H and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.

We recommend the owners of the MTV-4025LT2 TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    Main TP.S512.PB83

FIRMWARE FOR SPI FLASH  ----------->   MYSTERY MTV-4025LT2 , Main: TP.S512.PB83, Panel: CX400DLEDM or V400HJ6_PE1

 The appearance of MainBoard TP.S512.PB83 is shown in the figure below:
TP.S512.PB83
TP.S512.PB83 can be used in TVs:
AKAI LEA-39V51P (Panel LC390TA2A 902-P05-390H ), DEXP 40A7000 (Panel C400F13-E2-C), DEXP F39B7100E (Panel T390HVN04.0 CX390DLEDM), DEXP H32B7000C (Panel T320XVN02.9 C320X14-E2-A), DEXP F42B7000ED (Panel CX420DLEDM), DEXP F32C7000B (Panel BOEI320WU1), DEXP F32C7100B/W F32C7100 (Panel BOEI320WU1), DEXP 32A7000 (Panel BOEI320WU1), DEXP 42A7000 (Panel CX420DLEDM), DEXP F32B7000B (Panel BOEI320WU1), DEXP H39D7000E (Panel CX390DLEDM), DEXP F40B7000C (Panel C400F13-E2-C), DEXP H32B3200CD (Panel HV320WX2-201), HAIER LE28F6000T (Panel A275HD1A01-2 / LVW280CSDO E2 V2), HAIER LE32F6000T (Panel ST3151A05-8 LVW320CSDX E13 V2), MYSTERY MTV-4025LT2 (Panel CX400DLEDM), SHIVAKI STV-32LED13 (Panel SV320SHD PDL320TU2A X41), SHIVAKI STV-42LED16 (Panel V420HJ-P01), SHIVAKI STV-32LED14 (Panel CX315DLEDM AJ32TO3), SHIVAKI STV-40LED13W (Panel V400HJ6PE1-C2), SHIVAKI STV-32LED15 (Panel HV320WHB-N80), SUPRA STV-LC32T440WL (Panel C320X14-E13-H), SUPRA STV-LC32T900WL (Panel LC320TU3A), SUPRA STV-LC40T900FL (Panel 1080p Full HD 1920x1080), THOMSON T32D15DH-01B (Panel LVW320CSDX E13 V30), THOMSON T28D15DH-01B (Panel LVW280CSDE E3 V5), THOMSON T32D16DH-01W T32D16DH (Panel LVW320CSDX E19 V28), THOMSON T43D16SF-01B T43D16SF (Panel LVF430LGDO E2 V18).

Main features of the MYSTERY MTV-4025LT2 device:
Installed matrix (LED-panel) CX400DLEDM or V400HJ6_PE1.
To power the backlight LEDs, a converter is used, combined with the TP.S512.PB83 main board, controlled by the SN510P PWM controller. As power elements of the LED driver, keys of the AOD4454 type are used.
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 a TP.S512.PB83 module, using CPU chips: S2T512, SPI Flash: GD25Q64B, RT9108NB and others.
The R840 XF-3SDT-H tuner provides TV reception and channel tuning.
MYSTERY MTV-4025LW TV with LVF390CMTM LCD, 39 "(99 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 5000: 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 with a resolution of 1920x1080 pixels in a graphic resolution of 1080p (Full HD) standard. 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, WMA, MPEG4, Xvid , JPEG.
The power of the sound system 16 W (2x8 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 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.
The power consumed by the TV in the operating mode from the network is 90 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The LVF390CMTM E13 V5 panel of the MYSTERY MTV-4025LW 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.

REPAIR / SERVICING TV MYSTERY MTV-4023LW

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.

REPAIR / SERVICING TV MYSTERY MTV-4022LW

Technical description and composition of the MYSTERY MTV-4022LW TV, type of panel and applicable modules. The composition of the modules.
MYSTERY LED
Model: MTV-4022LW
Chassis / Version: MSDV3209-ZC01-01
Panel: M390HJ1-P01
LED backlight: LED39D13-ZC14-02 (B) 30339013206
T-CON: T390HVN01.0 CTRL BD 39T01-C03
LED driver (backlight): TV3901-ZC02-01 (C) 303C3901063
Power Supply (PSU): TV3205-ZC02-01 (A) 303C3205061
PWM Power: OB2263, ICE3B0565J
MainBoard: MSDV3209-ZC01-01 (D)
IC MainBoard: CPU: MSD308PX-LF-Z1 APGV911ZD, SPI Flash: MX25L6406EMI-12G, DDR: W9751G6IB
Tuner: DT58WT-3RB-E
Control: IR: 303C3262231 TV3262-ZC25-01 (A)
Technical Specifications MTV-4022LW
MYSTERY MTV-4022LW
General repair guidelines for TV LCD LED
MYSTERY MTV-4022LW, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. 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.
If the MTV-4022LW TV does not turn on, does not make any sounds when turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, only the stabilizer or power converter of the control processor may be faulty, which is typical for some MYSTERY models. 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.
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-4022LW TV has lost an 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 M390HJ1-P01 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.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes.
On the motherboard MSDV3209-ZC01-01 (D), 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).
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MSD308PX-LF-Z1 APGV911ZD, SPI Flash: MX25L6406EMI-12G, DDR: W9751G6IB requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
If you suspect a malfunction of the DT58WT-3RB-E tuner, first of all, make sure that there is a supply voltage on the corresponding output of the tuner.

Remember! Attempts to self-repair by users of the MYSTERY MTV-4022LW TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    Main MSDV3209-ZC01-01 Schematic diagram

The appearance of the MainBoard MSDV3209-ZC01-01 is shown in the figure below:
MainBoard MSDV3209-ZC01-01 uses a multifunctional microprocessor of the type MSD309PX or MSD308PX with an integrated scaler. Two RAM chips W9751G6IB are used as RAM. SPI Flash MX25L6406EMI-12G is made in the SOP-16 (16 pin) package.
It is advisable to start the repair of the motherboard by checking the voltage + 5V standby mode. In the operating mode, it is necessary to check the operability of linear stabilizers and power converters of the processor, memory, panel and other components of the board.
MSDV3209-ZC01-01 can be used in TVs:
BBK LEM3281FDT (Panel V315B1-LE9 REV.C1), BBK LEM3285FDTG (Panel V315H4-LE7 REV.C1), BBK LEM1949DT (Panel HT185WX3-100), BBK LEM3248DT (Panel V315B1-LE7 REV.C1), BBK LEM2665FDTG (Panel V260H1-LE8), BBK LEM3249FDT (Panel V315H4-LE8), BBK LEM2449FDT (Panel M236MWF7), BBK LEM3282DT (Panel V315B1-LEA), MYSTERY MTV-4018LW (Panel T390HVN01.0), MYSTERY MTV-4022LW (Panel M390HJ1-P01), MYSTERY MTV-4214LW (Panel T420HW08 V.5 FHD), MYSTERY MTV-3214LW (Panel V315H4-LE2 Rev.C1), MYSTERY MTV-4217LW (Panel T420HW09 V.9 (FHD)), MYSTERY MTV-3220LW (Panel V315H4-LE7).
The appearance of the power supply
Main features of the MYSTERY MTV-4022LW device:
Installed matrix (LED-panel) M390HJ1-P01.
The matrix control uses the Timing Controller (T-CON) T390HVN01.0.
To power the backlight LEDs, the TV3901-ZC02-01 LED driver is used.
The required supply voltages for all nodes of the MYSTERY MTV-4022LW TV are generated by the TV3205-ZC02-01 power supply module or its analogs using OB2263, ICE3B0565J microcircuits.
MainBoard - the main board (motherboard) is an MSDV3209-ZC01-01 module, using CPU chips: MSD308PX-LF-Z1 APGV911ZD, SPI Flash: MX25L6406EMI-12G, DDR: W9751G6IB and others.
Tuner DT58WT-3RB-E provides the reception of television programs and tuning to channels.
The MYSTERY MTV-4022LW TV with an M390HJ1-P01 LCD, 39 "(99 cm) diagonal size is 16: 9. The required brightness of the screen is 400 cd / m² by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 2000: 1. The LED panel of this TV has an end-face LED illumination - Edge LED. The TV’s design and technical features include viewing broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). Input high 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, WMA, MPEG4, DivX , MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by 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, 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 M390HJ1-P01 panel of the MYSTERY MTV-4022LW 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.

REPAIR / SERVICING TV MYSTERY MTV-4022LT2

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 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).
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.

REPAIR / SERVICING TV MYSTERY MTV-4019LW

Technical description and composition of the MYSTERY MTV-4019LW TV, type of panel and applicable modules. The composition of the modules.
MYSTERY LED
Model: MTV-4019LW
Chassis / Version: 40-MS82S0-MAD2XG
Panel: LVF390CMTM E13 V5
MainBoard: 40-MS82S0-MAD2XG
IC MainBoard: CPU: MST6E182VS-LF, FLASH: 25Q32
Tuner: F35WT-3-E
Technical Specifications MTV-4019LW
MYSTERY MTV-4019LW
General repair guidelines for TV LCD LED
TV MYSTERY MTV-4019LW, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of the already known typical malfunction.
In the case when the MTV-4019LW does not turn on, does not respond to the remote control and buttons on the front panel, does not blink lights and does not show any signs of operability, the power supply module is probably defective in this case. If it is serviceable with such manifestations, it is necessary to check the stabilizer (converter) of the processor power supply on the motherboard. In general, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
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-4019LW does not have an image, but there is sound and the TV is controlled by the remote control, there may be a malfunction in the backlight circuits of the LVF390CMTM E13 V5 panel. 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, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes.
Repair of the 40-MS82S0-MAD2XG motherboard must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MST6E182VS-LF, FLASH: 25Q32 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
If the TV works normally from external devices, but does not tune into television channels, the tuner F35WT-3-E may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).

Attention to the owners! Attempts to self-repair the TV MYSTERY MTV-4019LW are not recommended by the manufacturer and can lead to serious negative consequences!

FIRMWARE FOR SPI FLASH  ----------->   MYSTERY MTV-4019LW, Main: 40-MS82S0-MAD2XG, Panel: LVF390CMTM E13 V5

 Service Mode: Menu -> Image -> Contrast -> 1950 (9735).
If a failure occurs in the SPI FLASH software from Winbond, we recommend that you replace the chip with a new one. Often, unreadable Winbond microcircuits can temporarily restore their functionality after a strong temperature exposure, for example, heating with a soldering station or a lighter. Sometimes this is enough to read its regular contents.
Repair MainBoard
The appearance of the MainBoard 40-MS82S0-MAD2XG is shown in the figure below:
40-MS82S0-MAD2XG
40-MS82S0-MAD2XG can be used in TVs:
ERISSON 23LET70 (Panel LTA230AP01), GOLDSTAR 32A340R (Panel LVW320SSTM E1), GoldStar LT-42A320F (Panel LVF420AUBK), MYSTERY MTV-3225LW (Panel LVM320CSTME13V4), MYSTERY MTV-4019LW (Panel LVF390CMTM E13 V5), MYSTERY MTV-3219LW (Panel LVW320CSTME18 V2), TCL 40D3200 (Panel LTA400HM13 ), TCL 39D3320 39D3320F (Panel LVF390CMTM E13 V2), TCL 39E5000F3D (Panel V390HK1-LS5), THOMSON T39ED33HU (Panel LVF390CMTME15V2), THOMSON T32ED33U (Panel LSC320AN01-C06), THOMSON T32E32U (Panel LVW320SSTT E1).
Main features of the MYSTERY MTV-4019LW device:
Installed matrix (LED panel) LVF390CMTM E13 V5.
The required supply voltage for all nodes of the TV MYSTERY MTV-4019LW provides a switching power supply.
MainBoard - the main board (motherboard) is a 40-MS82S0-MAD2XG module, using CPU chips: MST6E182VS-LF, FLASH: 25Q32 and others.
The F35WT-3-E tuner provides television reception and channel tuning.

 The MYSTERY MTV-4019LW TV with an LVF390CMTM LCD display, 39 "(99 cm) diagonal size in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 4000: 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 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, WMA, MPEG4, DivX , MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by 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, 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.
The power consumed by the TV in the operating mode from the network is 90 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The LVF390CMTM E13 V5 panel of the MYSTERY MTV-4019LW 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.

REPAIR / SERVICING TV MYSTERY MTV-4018LW

Technical description and composition of the MYSTERY MTV-4018LW TV, type of panel and applicable modules. The composition of the modules.
MYSTERY LED
Model: MTV-4018LW
Chassis / Version: V1L07
Panel: T390HVN01.0
LED driver (backlight): TV3232-ZC02-01 (A)
PWM LED driver: AP3608EM, AP3039AM
MOSFET LED driver: B6010D
Power Supply (PSU): TV3205-ZC02-01
PWM Power: ICE3B0565J, LD7550BL (6pin)
MainBoard: MSDV3209-ZC01-01 (D)
IC MainBoard: CPU: MSD308PX, DDR: W9751G6IB, SPI: SPI Flash: MX25L6406EMI-12G, Sound: TPA3113D2
Tuner: DT58WT-3RB-E
Technical Specifications MTV-4018LW
MYSTERY MTV-4018LW
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the MYSTERY MTV-4018LW TV, as well as the external elements of the case. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
If the MTV-4018LW TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, only the stabilizer or power converter of the control processor may be faulty, which is typical for some MYSTERY models. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The ICE3B0565J LD7550BL 6pin PWM controller chip can also cause a breakdown of the power switch of the converter.
If the MYSTERY MTV-4018LW does not have an image, but there is sound, the backlight LEDs on the T390HVN01.0 panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
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.
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 chips MSDV3209-ZC01-01 TPA3113D2 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the varicap tuner DT58WT-3RB-E, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.

Once again, remind users! Attempts to self-repair a TV MYSTERY MTV-4018LW without the appropriate qualifications and experience can lead to its complete failure to repair!

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    Main MSDV3209-ZC01-01 Schematic diagram

FIRMWARE FOR SPI FLASH  ----------->   MYSTERY MTV-4018LW V1L07, Main: MSDV3209-ZC01-01(D), Panel: T390HVN01.0

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    TV3205-ZC02-01

 The appearance of the MainBoard MSDV3209-ZC01-01 is shown in the figure below:

MainBoard MSDV3209-ZC01-01 uses a multifunctional microprocessor of the type MSD309PX or MSD308PX with an integrated scaler. Two RAM chips W9751G6IB are used as RAM. SPI Flash MX25L6406EMI-12G is made in the SOP-16 (16 pin) package.

It is advisable to start the repair of the motherboard by checking the voltage + 5V standby mode. In the operating mode, it is necessary to check the operability of linear stabilizers and power converters of the processor, memory, panel and other components of the board.
MSDV3209-ZC01-01 can be used in TVs:
BBK LEM3281FDT (Panel V315B1-LE9 REV.C1), BBK LEM3285FDTG (Panel V315H4-LE7 REV.C1), BBK LEM1949DT (Panel HT185WX3-100), BBK LEM3248DT (Panel V315B1-LE7 REV.T160) -LE8), BBK LEM3249FDT (Panel V315H4-LE8), BBK LEM2449FDT (Panel M236MWF7), BBK LEM3282DT (Panel V315B1-LEA), MYSTERY MTV-4018LW (Panel T390HVN01.0), MYSTERY011-P90-M390301101201 , MYSTERY MTV-4214LW (Panel T420HW08 V.5 FHD), MYSTERY MTV-3214LW (Panel V315H4-LE2 Rev. C1), MYSTERY MTV-4217LW (Panel T420HW09 V.9 (FHD)), MYSTERY MTV-3220LW (Panel V315H4 -LE7).
The appearance of the power supply
Main features of the MYSTERY MTV-4018LW device:
Installed matrix (LED-panel) T390HVN01.0.
The LED driver TV3232-ZC02-01 (A) is used to power the backlight LEDs, it is controlled by the AP3608EM, AP3039AM PWM controller. As power elements of the LED driver, keys of the type B6010D are used.
The necessary supply voltages for all nodes of the MYSTERY MTV-4018LW TV are generated by the TV3205-ZC02-01 power supply module or its analogs using ICE3B0565J, LD7550BL (6pin) microcircuits.
MainBoard - the main board (motherboard) is an MSDV3209-ZC01-01 module, using CPU chips: MSD308PX, DDR: W9751G6IB, SPI: SPI Flash: MX25L6406EMI-12G, Sound: TPA3113D2 and others.
Tuner DT58WT-3RB-E provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T390HVN01.0
Type: a-Si TFT-LCD, Panel
Diagonal size: 39 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 853.92x480.33 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 8 pcs CCFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
MYSTERY MTV-4018LW TV with T390HVN01.0 LCD, 39 "(99 cm) diagonal size of 16: 9 format. The required screen brightness of 400 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 graphical decomposition 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, 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 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: 800x600, 1024x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C standards.
The power consumed by the TV in the operating mode from the network is 90 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The T390HVN01.0 panel of the MYSTERY MTV-4018LW 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.

REPAIR / SERVICING TV MYSTERY MTV-4018LT2

 Technical description and composition of the MYSTERY MTV-4018LT2 TV, type of panel and applicable modules. The composition of the modules.
MYSTERY LED
Model: MTV-4018LT2
Chassis / Version: MSDV3223-ZC01-01
Panel: V390HJ1-P02
LED driver (backlight): TV3901-ZC02-01 (C) P / N: 303C3901063
Power Supply (PSU): TV3205-ZC02-01 (A) P / N: 303C3205061
PWM Power: ICE3B0565J, LD7550BL (6pin)
MainBoard: MSDV3223-ZC01-01
IC MainBoard: 25Q64-104HIP; K4B1G1646G-BCKO
Technical Specifications MTV-4018LT2
MYSTERY MTV-4018LT2
General repair guidelines for TV LCD LED
Any repair usually begins with an external inspection. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. In some cases, faulty elements are visible to the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the MYSTERY MTV-4018LT2 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. In some cases, only the processor power regulator may be faulty. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
Sometimes the MYSTERY MTV-4018LT2 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the LED backlight converter V390HJI-P02, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the operability of the electrolytic capacitors of the filter by supplying the LED driver itself, including the PSU.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the rations of their terminals, 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.
The motherboard MSDV3223-ZC01-01 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.
In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - SPI Flash: 25Q64-104HIP; 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).

It should be remembered! Attempts to repair the MYSTERY MTV-4018LT2 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

FIRMWARE FOR SPI FLASH  ----------->   MYSTERY MTV-4018LT2, Main: MSDV3223-ZC01-01, Panel: V390HJI-P02

 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-4018LT2 device:
Installed matrix (LED panel) V390HJ1-P02.
The LED driver TV3901-ZC02-01 (C) is used to power the backlight LEDs.
The required supply voltages for all nodes of the MYSTERY MTV-4018LT2 television are generated by the TV3205-ZC02-01 power supply module or its analogs using ICE3B0565J, LD7550BL (6pin) microcircuits.
MainBoard - the main board (motherboard) is an MSDV3223-ZC01-01 module, using 25Q64-104HIP chips; 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-4018LT2 TV with V390HJ1-P02 LCD display, diagonal size 39 "(99 cm) 16: 9 format. The required brightness of the screen 400 cd / m² is provided by LED backlight LED. 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 graphical decomposition 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 , DivX, MKV, JPEG.
The power of the sound system 16 W (2x8 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 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, 1280x1024, 1360x768, 1920x1080.
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 90 watts.
Overall dimensions: 906x645x250 mm.
TV Weight: 8.5 kg.
Attention! The V390HJ1-P02 panel of the MYSTERY MTV-4018LT2 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.