Technical description and composition of the MYSTERY MTV-3205W TV, panel type and applicable modules. The composition of the modules.MYSTERY
Model: MTV-3205W
Panel: TM315GW01 V.0
Inverter (backlight): VIT61801.00 REV: 0
PWM Inverter: OZ964AGN
MOSFET Inverter: P4004ED, P3004BD
Power Supply (PSU): MLT668TL REV: 1.3
PWM Power: L6562D (PFC), LD7535, SG3525 (MC063PG)
MOSFET Power: 13N50C, 5N50CF
MainBoard: 090-6E1610-04
IC MainBoard: CPU: MST6M16, SPI Flash: EN25P (F) 16, EEPROM: FM24C64A, SDRAM: H5DU1262GTR-FBC; HEF4052BT, CT3257A, TDA7266SA
Tuner: AFT7 / W110G
Technical Specifications MTV-3205W
MYSTERY MTV-3205W
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-3205W TV, both internal and external. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
In the case when the MTV-3205W 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, most likely in this case the power module is faulty. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse, and if it breaks, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
Power switches in flyback converters fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
If the MYSTERY MTV-3205W does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU.
Repair of the inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety during depressurization of lamps, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits to be able to make the necessary measurements at the control points of the circuit.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Repair or diagnostics of the 090-6E1610-04 motherboard must be started by checking the power stabilizers. If necessary, you should 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, you should check its elements - 7266SA, EN25F16, 24С04, 24С64 and replace failed chips with new ones.
Attention to the owners! Attempts to self-repair the MYSTERY MTV-3205W TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> MLT668TL
The appearance of MainBoard 090-6E1610-04 is shown in the figure below:090-6E1610-04
090-6E1610-04 can be used in TVs:
BBK LD3224SU + DVD (Panel TM315GW01 V.0), MYSTERY MTV-3205W (Panel TM315GW01 V.0).
PSU Advanced
The MTV-3205W TV is equipped with the MLT668TL power module using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the L6562D PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes, when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the MYSTERY MTV-3205W device:
Installed matrix (LCD-panel) TM315GW01 V.0.
The VIT61801.00 inverter is used to power the backlight, controlled by the OZ964AGN PWM controller. As power elements of the inverter, keys of the type P4004ED, P3004BD are used.
The required supply voltages for all nodes of the MYSTERY MTV-3205W TV are generated by the MLT668TL power supply module or its analogs using L6562D (PFC), LD7535, SG3525 (MC063PG) microcircuits and 13N50C, 5N50CF type power switches.
MainBoard - the main board (motherboard) is a 090-6E1610-04 module using CPU chips: MST6M16, SPI Flash: EN25P (F) 16, EEPROM: FM24C64A, SDRAM: H5DU1262GTR-FBC; HEF4052BT, CT3257A, TDA7266SA and others.
The AFT7 / W110G tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: TM315GW01 V.0
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare, Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 4.62% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
MYSTERY MTV-3205W TV with TM315GW01 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. 400 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. 2000: 1 dynamic contrast is provided by 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 image otka and formation takes place in the digital signal standards 480i, 480p, 576i, 576p, 720p, 1080i.
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 x2, audio x3, S-Video, component, SCART, VGA, HDMI x3. 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.
The power consumed by the TV in the operating mode from the network is 200 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The TM315GW01 V.0 panel of the MYSTERY MTV-3205W LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!