Technical description and composition of the MYSTERY MTV-3210W TV, panel type and applicable modules. The composition of the modules.MYSTERY
Model: MTV-3210W
Chassis / Version: V2L03
Panel: LC320WXE SBV2
T-CON: LC320 LC260 6870C-0303B, TL2336ML
Inverter (backlight): integrated into PSU
PWM Inverter: SG3525, AS358A, F2222
Power Supply (PSU): MIP329FL Rev1.0 MIP320FL-T3 KB2150
PWM Power: LD7535 (PWM 6 pin), L6562D (PFC), SG3525 (+ 12V)
MOSFET Power: STD5N52U, F2HNK60Z
MainBoard: CV181H-X
IC MainBoard: 25Q32BVSIG (8)
Tuner: CDT-3SP5I2-37
Technical Specifications MTV-3210W
MYSTERY MTV-3210W
General recommendations for repairing TV LCD
Any repair of electronic equipment begins with an external inspection of the device and diagnostics of the malfunction. In this case, you should visually carefully examine all the elements of the MYSTERY MTV-3210W TV, both internal and external. Often, according to certain external signs, the repairman can draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. 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-3210W TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up and do not blink, and there are no sounds and no signs of operability at all, the MIP329FL Rev1 power supply module is most likely faulty. 0 MIP320FL-T3 KB2150 or, which is much less common, there is no processor power on the motherboard. When diagnosing and repairing the MIP329FL Rev1.0 MIP320FL-T3 KB2150 power supply, it is first necessary to check the fuse, and if it breaks, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
It should be remembered that the N-FET keys used in flyback converters rarely fail for no reason that must be sought by checking other elements of the circuit. 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.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the MYSTERY MTV-3210W TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for excessive ESR.
The operation of the power circuits of the inverter and the backlight in the normal mode are controlled by special protection, which is organized for fire safety, for example, to disconnect during short circuits or breaks in high-voltage connections or when the lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, check 25Q32BVSIG.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Mystery MTV-3210W
TPS65161 , 17108E , 6870S-0901B , BUF08822 , SUT290 , ST 402Rb
The appearance of the MainBoard CV181H-X is shown in the figure below:The CV181H-X motherboard uses the MST6M181VG processor, combined with a scaler and installed using BGA technology.
It is advisable to start the repair of this MainBoard by checking the linear stabilizers and voltage converters necessary to provide power to the processor nodes: 1.2V, 2.5V, 3.3V. If there is no image, but the display backlight is working properly, it is necessary to check the power of the 5V or 12V LCD panel, depending on the type of panel used, which should be measured directly on the LVDS connector. If the TV does not exit Stand-by mode and does not respond to the remote control and control buttons, if the necessary supply voltages are available, the SPI Flash software should be updated.
CV181H-X can be used in TVs:
IZUMI TLE32H330B (Panel T320XVN01.0), MYSTERY MTV-3210W (Panel LC320WXE SBV2), SUPRA STV-LC27270FL (Panel M270H3-L05).
PSU Advanced
The MIP329FL power module is made using a Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on the L6562D PWM controller, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
Main features of the MYSTERY MTV-3210W device:
Installed matrix (LCD panel) LC320WXE SBV2.
The matrix control uses the Timing Controller (T-CON) LC320.
To power the backlight, a converter is used, combined with a power supply, controlled by a PWM controller SG3525, AS358A, F2222.
The required supply voltages for all nodes of the MYSTERY MTV-3210W TV are generated by the MIP329FL power supply module or its analogs using microcircuits LD7535 (PWM 6 pin), L6562D (PFC), SG3525 (+ 12V) and power switches of the STD5N52U, F2HNK60Z type.
MainBoard - the main board (motherboard) is a CV181H-X module, using 25Q32BVSIG microcircuits (8) and others.
The tuner CDT-3SP5I2-37 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WXE-SBV2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 9 (G to G)
Frequency: 60Hz
Lamp Type: 10 pcs EEFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
MYSTERY MTV-3210W TV with LC320WXE LCD display, 32 "(81 cm) diagonal size in 16: 9 format. 450 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Dynamic contrast ratio 4000: 1 is provided with special operation control illumination depending on the illuminated areas in the plot. 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 PAL, SECAM, NTSC. Graphic processing Digital signal rejection and generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: MP3, WMA, MPEG4, JPEG.
The power of the speaker system of sound 14 W (2x7 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, S-Video, component, SCART, 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, 1360x768.
The power consumed by the TV in the operating mode from the network is 150 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The MYSTERY MTV-3210W LCD TV panel LC320WXE SBV2 is the most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!