Technical description and composition of the TV SUPRA STV-LC2204WD, type of panel and applicable modules. The composition of the modules.SUPRA
Model: STV-LC2204WD
Chassis / Version: E322995 2LE05177A1
Panel: 22 inch
Inverter (backlight): IV0190415 REV: 00
PWM Inverter: TL494C
MOSFET Inverter: ME4542
Trans Inverter: IVTEL 1900033 1036
Power Supply (PSU): AYP172003
MainBoard: E322995 2LE05177A1
IC MainBoard: MST719DU-LF. CSC2314F
Tuner: TAF6-C2I21VH 9A15AF
Technical Specifications STV-LC2204WD
SUPRA STV-LC2204WD
General repair guidelines for TV LCD
Repair of all electronic devices, including the SUPRA TV, based on the chassis E322995 2LE05177A1, it is advisable to start with an external examination of its external and internal elements. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. If ring cracks are detected in the soldered 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.
If the power module AYP172003 malfunctions, the external manifestations may be different, for example, SUPRA STV-LC2204WD does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when turned on, but there are sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked.
When repairing the IV0190415 REV: 00 inverter, often for diagnostics it is necessary to turn off the protection, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
Repair of the motherboard E322995 2LE05177A must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips MST719DU-LF, CSC2314F and other possible faulty components, for example, the tuner TAF6-C2I21VH 9A15AF. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Once again, remind users! Attempts to self-repair a SUPRA STV-LC2204WD TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> JUG7.820.510-2 MST718BE
The appearance of the MainBoard JUG7.820.510-2 is shown in the figure below:JUG7.820.510-2
The appearance of the power supply
Main features of the SUPRA STV-LC2204WD device:
Installed matrix (LCD-panel) 22 inches.
An IV0190415 inverter is used to power the backlight, controlled by a TL494C PWM controller. An IVTEL 1900033 1036 transformer is installed in the inverter converter. Keys of type ME4542 are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC2204WD TV is carried out by the AYP172003 power module, or its analogues.
MainBoard - the main board (motherboard) is an E322995 module using MST719DU-LF chips. CSC2314F and others.
The TAF6-C2I21VH 9A15AF tuner provides TV reception and channel tuning.
Information from an alternative source:
SUPRA STV-LC2204WD
Motherboard: E322995 2LE05177A1, MST719DU-LF, CSC2314F, Tuner: TAF6-C2I21VH 9A15AF
Invertor: IV0190415 REV: 00.
PSU: AYP172003 Schematic
LCD TV SUPRA STV-LC2204WD with LCD, diagonal size 22 "(55 cm) 16: 9 format. The brightness of the screen 300 cd / m² is provided by backlight fluorescent lamps CCFL (EEFL). Contrast - the ratio of maximum brightness to minimum is 1000: 1. You can watch broadcasts and movies and images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and generation of a digital signal occurs in standards 480i, 480p, 576i, 576p. Supported media file formats: MP3, MPEG4, VideoCD, SVCD, Picture CD, JPEG.
The power of the speaker system of sound 4 W (2x2 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, 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, 800x600, 1024x768.
Overall dimensions: 600x457x142 mm.
TV Weight: 8 kg.
Attention! The SUPRA STV-LC2204WD LCD TV panel is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen surface to avoid permanent damage to the LCD panel!