Technical description and composition of the MYSTERY MTV-1703 TV, type of panel and applicable modules. The composition of the modules.MYSTERY
Model: MTV-1703
Chassis / Version: V1J08
Panel: PL173TP-01C
Lamp backlight: 4 Lamp CCFL
Inverter (backlight): integrated into PSU
Power Supply (PSU): AC600-FL AC481A-FL-4D
MainBoard: B.PT361G 9042
IC MainBoard: NT68625MFG-128, 24C16, SC7313S, TEA2025B, TB1334FG
Tuner: ET-6T1E-LF-108W-A
Technical Specifications MTV-1703
MYSTERY MTV-1703
General recommendations for repairing TV LCD
Possible manifestations of defects
- The MYSTERY MTV-1703 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Most likely in this case, the main AC600-FL switching power supply (MPS) is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
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, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, 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.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuit should be restored immediately after the repair is completed.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the B.PT361G 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). Board repair and replacement of chips NT68625MFG-128, 24C16, SC7313S, TEA2025B, TB1334FG 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.
Before replacing the tuner ET-6T1E-LF-108W-A, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Owners and users of the MYSTERY MTV-1703 TV should 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 -----------> EEPROM MYSTERY MTV-1703 V1J08, Main: B.PT361G 9042, Panel: PL173TP-01C
The appearance of MainBoard B.PT361G is shown in the figure below:B.PT361G
The appearance of the power supply
Main features of the MYSTERY MTV-1703 device:
Installed matrix (LCD panel) PL173TP-01C.
To power the backlight, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the MYSTERY MTV-1703 TV is carried out by the AC600-FL power module, or its analogs.
MainBoard - the main board (motherboard) is a B.PT361G module, using chips NT68625MFG-128, 24C16, SC7313S, TEA2025B, TB1334FG and others.
The ET-6T1E-LF-108W-A tuner provides TV reception and channel tuning.
MYSTERY MTV-1703 TV with PL173TP-01C LCD, diagonal size 17 "(43 cm), 4: 3 format. Screen brightness of 350 cd / m² is ensured by backlighting with CCFL (EEFL) fluorescent lamps. Contrast as the ratio of maximum brightness to the minimum is 400: 1. The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standards 480i, 576i.
The power of the acoustic system of sound 6 W (2x3 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, S-Video, VGA. 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.
The power consumed by the TV in the operating mode from the network is 48 watts.
Dimensions: With stand 642x444x209 mm, Without stand 570x345x70 mm.
Attention! The MYSTERY MTV-1703 LCD TV panel PL173TP-01C is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!