Technical description and composition of the SUPRA STV-LC1904W TV, panel type and modules used. The composition of the modules.SUPRA
Model: STV-LC1904W
Chassis / Version: JUG7.820.510-2
Panel: HT190WG1-600
T-CON: HT190WG1-100VE-X0.2 NT71672FG-00022 5411IREZ 7516Z
Inverter (backlight): FSP048-2PI04
PWM Inverter: MP1038EY MIP1038EY
Trans Inverter: SPI 8TC00321
Power Supply (PSU): FSP048-2PI04
PWM Power: STR-W6525
MainBoard: JUG7.820.510-2
IC MainBoard: MST718BE-LF, 24LC32, 4803A, CSC2314F, TEA2025B
Tuner: TAF6-C2I21VH 9511AF
STV-LC1904W Specifications
SUPRA STV-LC1904W
General recommendations for TV LCD repair
SUPRA with JUG7.820.510-2 chassis, like other TVs, it is advisable to start repairing with a careful examination of external and internal elements and modules. According to some external signs of a change in the state of some elements, it sometimes becomes possible to make assumptions about the nature of the defect, as well as to determine the further direction of troubleshooting. If ring cracks are found in the soldering of the terminals of the elements or broken connecting tracks, swollen capacitors or charred resistors - all this may be characteristic signs of the causes or consequences of an already known typical malfunction.
If the TV does not turn on, none of the indicators on its front panel will light or blink. Also, if the TV does not respond to the remote control and buttons, does not emit any sounds and any signs of operability when turned on, there is a certain probability that the FSP048-2PI04 power supply module is faulty and needs repair. Sometimes a problem with similar manifestations can occur only in the absence of processor power, which is typical for certain SUPRA models. The first step is to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse in the power supply is broken, in most cases a breakdown of the power switch (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. You should also check the diodes of the rectifier bridge and the electrolytic capacitor of the mains rectifier filter.
Power switches in switching power supplies (SMPS) fail for no reason very rarely and, in case of their breakdown, 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 reason may be a malfunction of the STRW6525 PWM regulator microcircuit, which can only be checked by replacing it with a new or known good one.
If, when SUPRA STV-LC1904W is turned on, there is no image, or it appears for a second and disappears altogether, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the common power supply.
The operation of the power circuits of the inverter and the backlight lamps in the normal mode is controlled by special protection, which is organized for fire safety purposes, for example, to disconnect when short circuits or breaks in high-voltage connections or when lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
The SUPRA STV-LC1904W has no picture when there is a signal is often caused by a malfunction of the display backlight. Moreover, the problem can be both inside the LCD panel (matrix) HT190WG1-600, for example, a malfunction of the CCFL (EEFL) lamps, and outside in their power source - the inverter.
Without backlighting, sometimes you can see a barely noticeable image with a certain successful hit of external light on the screen.
Often, repairing the backlight requires disassembling the HT190WG1-600 LCD panel - a painstaking process that requires special attention and accuracy from the master. In such cases, there is a possibility, with the slightest negligence, to damage the glass or loops and the TV may become unrepairable.
Without backlighting, sometimes you can see a barely noticeable image with a certain successful hit of external light on the screen.
Often, repairing the backlight requires disassembling the HT190WG1-600 LCD panel - a painstaking process that requires special attention and accuracy from the master. In such cases, there is a possibility, with the slightest negligence, to damage the glass or loops and the TV may become unrepairable.
We strongly do not recommend doing such work to owners of TVs and craftsmen who do not have experience in repairing LCD panels! Moreover, at home (at the owner's home).
If there is no image in the presence of backlight, the screen becomes slightly lighter when turned on, and if the TV is open, the light from the lamps can be seen through the holes in the panel case.
In this case, there may be a malfunction inside the panel, damage to strips, loops, the T-CON board (Timing Controller) may be defective. But the main board MainBoard JUG7.820.510-2 often turns out to be faulty, a software failure is also possible.
In such cases, the master first of all needs to check the main supply voltage of the panel at the LVDS connector, the fuses on the T-CON board or the panel brackets, as well as the supply and reference voltages for the line and column drivers - VGH, VGL, Vcom.
If all of the above measurements are within the normal range, then the oscilloscope needs to track the passage of LVDS signals from the MainBoard JUG7.820.510-2, as well as synchronizing signals from T-CON to loops with drivers.
Repair or diagnostics of the JUG7.820.510-2 motherboard should begin with checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software). Repair of the board and replacement of microcircuits MST718BE-LF, 24LC32, 4803A, CSC2314F, TEA2025B are performed if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by the warm-up method.
Once again, we remind TV users: do not try to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repairs only to professionals with sufficient experience in the field of electronic repair.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> JUG7.820.510-2 MST718BE
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC1904W_25F40-100GCP
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC1904WD. Cpu: MST718BE-LF
Login to Service Menu LCD TV 15'-22 '', Main Board JUG7.820.510-2, percent MST718DU-LF
To identify the firmware and Main Board:
Turn on TV, Turn the volume down to "0" from the remote control or on the TV, Press "MUTE", Simultaneously press "MENU" on the remote control and on the TV.
The "Service Menu" will open, in which the firmware version will be indicated. In accordance with the firmware version and TV model, select Main Board, check the LCD name (the firmware is in the Main board name).
The appearance of the MainBoard JUG7.820.510-2 is shown in the figure below:
JUG7.820.510-2JUG7.820.510-2 can be used in TVs:
SUPRA STV-LC1904W (Panel HT190WG1-600), SUPRA STV-LC2204W (Panel CLAA216WA01), SUPRA STV-LC1911WD (Panel HT190WG1-600).
External view of the power supply
Main features of SUPRA STV-LC1904W device:
Installed matrix (LCD panel) HT190WG1-600.
Matrix control uses Timing Controller (T-CON) HT190WG1-100VE-X0.2.
The FSP048-2PI04 inverter is used to power the backlight lamps, it is controlled by the MP1038EY MIP1038EY PWM controller. The transformer SPI 8TC00321 is installed in the inverter converter.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC1904W TV is carried out by the FSP048-2PI04 power module, or its analogs using STR-W6525 microcircuits.
MainBoard - the main board (motherboard) is a JUG7.820.510-2 module, using MST718BE-LF, 24LC32, 4803A, CSC2314F, TEA2025B and others.
The TAF6-C2I21VH 9511AF tuner provides reception of television programs and tuning to channels.
Information from an alternative source:
SUPRA STV-LC1904W
Panel type (matrix): HT190WG1-600,
Motherboard: JUG7.820.510-2, MST718BE-LF, 24LC32, 25X40AVNIG, 4803A, CSC2314F, TEA2025B, Tuner: TAF6-C2I21VH 9511AF
T-con: HT190WG1-100VE-X0.2, NT71672FG-00022, 5411IREZ, 7516Z
PSU & Invertor: FSP048-2PI04 P / N: 3BS0141212GP, STRW6525, MP1038EY, Tr-r: SPI 8TC00321,
Additional technical information about the panel:
Brand: BOE
Model: HT190WG1-600
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 (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LCD TV SUPRA STV-LC1904W with LCD HT190WG1-600, 19 "(48 cm) 16: 9. Brightness of the screen 300 cd / m² is provided by backlighting with CCFL (EEFL) fluorescent lamps. Contrast is the ratio of maximum brightness to the minimum is 1000: 1. It is possible to view broadcasts and films and images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready) .Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and formation digital signal occurs in the standards 480i, 480p, 576i, 576p.
The power of the acoustic system of sound 4 W (2x2 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, S-Video, component, VGA. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024.
The power consumed by the TV in operating mode from the mains is 60 W.
Overall dimensions: 522x455x145 mm.
TV weight: 7.5 kg.
Attention! SUPRA STV-LC1904W LCD TV panel HT190WG1-600 is the most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel!