Technical description and composition of the MYSTERY MTV-1906W TV, panel type and applicable modules. The composition of the modules.MYSTERY
Model: MTV-1906W
Panel: M190MWW3
Lamp backlight: 4 Lamp CCFL
Inverter (backlight): integrated into PSU
PWM Inverter: MP1048
MOSFET Inverter: AO4804
Trans Inverter: BCK-19230WH
Power Supply (PSU): TV2201-ZC02-01 (D) P / N: 303C2201064
PWM Power: FSDM07652R
MainBoard: MSTV2203-ZC01-01 (B)
IC MainBoard: CPU: TSUMV26KU-LF, EEPROM: 24C32, SPI: 25L4005AMI, TDA1517P
Tuner: F21WT-3BAR-E
Technical Specifications MTV-1906W
MYSTERY MTV-1906W
General recommendations for repairing TV LCD
Repair of the MYSTERY MTV-1906W TV is better to start with a thorough external inspection and troubleshooting. It is advisable to carefully examine the internal and external components. Many visible signs make it possible to determine the future direction of troubleshooting and localization of 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.
Sometimes the MYSTERY MTV-1906W TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. When diagnosing and repairing the power supply, it is necessary first of all to check the fuse, and if it breaks, you should check the power switch and rectifier bridge diodes for avalanche (thermal) breakdown.
It should be remembered that in the practice of repair, usually the power keys of N-Fet converters 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 FSCM0765R 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.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If the MYSTERY MTV-1906W 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 an overstated ESR.
In most cases, the diagnosis and repair of the inverter is difficult due to the organization of protection, which turns it off in emergency cases in order to avoid fires during short circuits or breaks in high voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
It should be remembered that when the protection is turned off, there is always a risk of failure of the inverter power elements during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
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). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - 25X40AVNIG, TFA9843J, CPU: TSUMV26KU-LF, EEPROM: 24С32, SPI: 25L4005AMI, TDA1517P with new or obviously working ones.
Owners and users of the MYSTERY MTV-1906W 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!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> MYSTERY MSTV2203-N1
FIRMWARE FOR SPI FLASH -----------> MYSTERY MTV-1906W, Main Board MSTV2203-ZC01-01(B)
Mystery MTV-1906W Service mode: SOURCE+2580
The appearance and voltage measurements at the control points of MainBoard MSTV2203-ZC01-01 are shown in the figure below:MSTV2203-ZC01-01
MSTV2203-ZC01-01 can be used in TVs:
BBK LT1929S (Panel F21WT-3BAR-E), BBK LT1529S (Panel M156MWR1), MYSTERY MTV-2206W (Panel CLAA216WA01), MYSTERY MTV-1906W (Panel M190MWW3), MYSTERY MTV-1607w (Panel M156MWR1), MYSTERY MTV-1907W (Panel BOE HT185WX2-10), MYSTERY MTV-2417WHD (Panel M236MWF1), MYSTERY MTV-2407WH (Panel V236H1-L05 Rev:C1), MYSTERY MTV-2217WD (Panel CLAA215FA05), MYSTERY MTV-1917WD (Panel CLAA185WA06).
The appearance of the power supply
Main features of the MYSTERY MTV-1906W device:
Installed matrix (LCD-panel) M190MWW3.
To power the backlight, a converter is used, combined with a power supply, controlled by the MP1048 PWM controller. The transformer BCK-19230WH is installed in the inverter converter. As power elements of the inverter, keys of the AO4804 type are used.
The required supply voltages for all nodes of the MYSTERY MTV-1906W TV are generated by the TV2201-ZC02-01 power supply module or its analogs using FSDM07652R microcircuits.
MainBoard - the main board (motherboard) is an MSTV2203-ZC01-01 module, using CPU chips: TSUMV26KU-LF, EEPROM: 24С32, SPI: 25L4005AMI, TDA1517P and others.
The F21WT-3BAR-E tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: IVO
Model: M190MWW3 R1
Type: a-Si TFT-LCD, Panel
Diagonal size: 19.0 inch
Resolution: 1440x900, WXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 408.24x255.15 mm
Surface: Antiglare, Hard coating
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
MYSTERY MTV-1906W TV with M190MWW3 LCD, 19 "(48 cm) diagonal 16:10 format. Screen brightness of 300 cd / m² is provided by CCFL (EEFL) fluorescent lamps. Contrast, as the ratio of maximum brightness to minimum, is 800: 1. It is possible to view images in high quality HD at a resolution of 1440x900 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM. Graphic processing and digital signal generation takes place in standard max 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the speaker system is 6 watts (2x3 W). 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, S-Video, component, SCART, VGA, HDMI. 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 50 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The M190MWW3 panel of the MYSTERY MTV-1906W 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!