Technical description and composition of the MYSTERY MTV-3209W TV, panel type and applicable modules. The composition of the modules.MYSTERY
Model: MTV-3209W
Chassis / Version: V4L03
Panel: LC320WXE (SB) (V2)
T-CON: 6870C-0303B (TL2336ML)
Inverter (backlight): integrated into PSU
PWM Inverter: SG3525AN
Power Supply (PSU): MP01009 Rev: 1.3 (PMP1-BCQ244-16995)
PWM Power: L6562D (PFC), LD7535
MOSFET Power: F13NK50Z, F3NK80Z
MainBoard: MST6M181-T2B Rev: A3
IC MainBoard: CPU: MST6E181VS-LF-Z1, Flash: W25Q32BVSIG
Tuner: CDT-3FC2I2-36
Technical Specifications MTV-3209W
MYSTERY MTV-3209W
General recommendations for repairing TV LCD
It is advisable to start repairing MYSTERY with the V4L03 chassis, like other TVs, with a careful examination of the external and internal elements and modules. 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 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 an already known typical malfunction.
In the absence of any signs of operability, when the MYSTERY MTV-3209W 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 power module MP01009, Rev: 1.3 (PMP1-BCQ244-16995 of the TV. With the same manifestations, it may be malfunctioning and a power regulator of the control processor on the motherboard.When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the secondary rectifiers of the converter. fuse failure, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply.First of all, check the diodes of the rectifier bridge of the mains voltage and the power key (s) of the converter.
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-3209W TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of an inverter (converter for powering the backlight) malfunction. When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power. If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
If the motherboard MST6M181-T2B, Rev: A3 is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement. In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: MST6E181VS-LF-Z1, Flash: W25Q32BVSIG 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).
Owners and users of the MYSTERY MTV-3209W TV 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!
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-3209W (V4L03), Main MST6M181-T2B Rev: A3, PANEL LC320WXE (SB)(V2).
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> MP01009 Power supply
In cases where there is a malfunction in the SPI FLASH software and a microcircuit manufacturer Winbond is installed, we recommend replacing it with a new one. Sometimes faulty SPI Winbond microcircuits can be restored for a while after being heated by a hairdryer or a lighter, which makes it possible to read the properly installed software.
Repair MainBoardThe appearance of the MainBoard MST6M181-T2B is shown in the figure below:
MST6M181-T2B
PSU Advanced
The MP01009 power module is designed 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.
The appearance of the power supply
Main features of the MYSTERY MTV-3209W device:
Installed matrix (LCD panel) LC320WXE (SB) (V2).
The matrix control uses the Timing Controller (T-CON) 6870C-0303B.
To power the backlight, a converter is used, combined with the power supply, controlled by the SG3525AN PWM controller.
The necessary supply voltages for all nodes of the MYSTERY MTV-3209W TV are generated by the MP01009 power module or its analogs using L6562D (PFC), LD7535 microcircuits and power switches of the F13NK50Z, F3NK80Z type.
MainBoard - the main board (motherboard) is an MST6M181-T2B module using CPU chips: MST6E181VS-LF-Z1, Flash: W25Q32BVSIG and others.
Tuner CDT-3FC2I2-36 provides the reception of television programs and tuning to channels.
Information from an alternative source:
LCD Mystery MTV-3209W (V4L03)
Panel Type (Matrix): LC320WXE (SB) (V2),
Motherboard: MST6M181-T2B, Rev: A3, MST6E181VS-LF-Z1, W25Q32BVSIG, CDT-3FC2I2-36,
T-con: P / N 6870C-0303B
PSU & Invertor: MP01009 Rev: 1.3 PMP1-BCQ244-16995
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-3209W 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 3000: 1 is provided with special operation control illumination depending on the illuminance of 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. and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, MPEG4, JPEG.
The power of the sound system 20 W (2x10 W) provides 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 x3, 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.
The power consumed by the TV in the operating mode from the network is 100 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The LC320WXE (SB) (V2) panel of the MYSTERY MTV-3209W 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!