Technical description and composition of the SUPRA STV-LC2622WD TV, panel type and modules used. The composition of the modules.SUPRA
Model: STV-LC2622WD
Panel: MT215DW01
Inverter (backlight): integrated into PSU
PWM Inverter: SG3525AN
Power Supply (PSU): MIP260B
PWM Power: L6561D, F9222L, KA3525A
MOSFET Power: 13N50C
MainBoard: CVMV26L-A-20
IC MainBoard: TSUMV26KE-LF, 24C32, EN25F40-100GCP
Tuner: F21WT-3BAR-E
Technical Specifications STV-LC2622WD
SUPRA STV-LC2622WD
General recommendations for TV LCD repair
Repair and diagnostics of any electronic device, in particular SUPRA with a chassis, it is advisable to begin with a careful external examination of the internal and external elements. 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. Experienced repairers often guess about the causes of the defect and the possible consequences, for example, by ring cracks in the soldering of the element terminals, as well as by swollen capacitors or resistors burned out to coal dust and other external indirect signs.
In the absence of any signs of operability, when SUPRA STV-LC2622WD does not turn on and does not signal anything with control lamps on the panel, there is a possibility of a malfunction of the D5888S MIP260 power supply module of the TV. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. Diagnostics and repair of the common power supply should always begin with checking the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
It should be remembered that in the practice of repair, usually power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the reason 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 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.
If, when SUPRA STV-LC2622WD 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.
Diagnostics and repair of the inverter are often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any abnormal situation, for example, when lamps are worn out or depressurized. Often, to localize a defect, its blocking is required.
When repairing the MB board, you need to check its components SPHE8202TQ PNX8302HL / C1 / 31 TDA8891 MP1410. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating. If chips with BGA soldering technology are used, the problem in its implementation is detected by local heating of the chip.
Attention to the owners! Attempts to self-repair a SUPRA STV-LC2622WD TV are not recommended by the manufacturer and can lead to serious negative consequences!
Repair MainBoardThe appearance of the MainBoard CVMV26L-A-20 is shown in the figure below:
CVMV26L-A-20
The CVMV26L-A-20 motherboard uses the TSUMV26KE-LF processor (TSUMV36KE-LF) combined with a scaler, SPI FLASH 520Kb ROM and EEPROM 24C02C.
It is advisable to start MainBoard repairs with checking the voltage converters and linear stabilizers, which are necessary to provide power in the operating and standby modes. Check the power supply of the 5V or 12V LCD panel, depending on the type of panel used, it is necessary to measure directly on the LVDS connector. If, in the presence of the necessary supply voltage, the TV does not exit Stand-by mode, does not respond to the remote control and control buttons, update SPI Flash software.
CVMV26L-A-20 can be used in TVs:
SUPRA STV-LC1926WD (Panel M185XW01 V0), SUPRA STV-LC1922WD (Panel MT185GW01 V.0), SUPRA STV-LC2222WD (Panel CLAA215FA), SUPRA STV-LC2622WD (Panel MT215DW01), SUPRA STV-LC1626WD (Panel 720p HD 1600x900), SUPRA STV-LC2417F STV-LC2417FD (Panel M236H1-P01), SUPRA STV-LC1515WD (Panel 720p HD 1366x768), SUPRA STV-LC2422W (Panel M236M1-L01), SUPRA STV-LC2422WD (Panel Panel), THOMSON T24C99H CVMV26L-A (Panel M236H1-L01 Rev.C2).
Main features of the SUPRA STV-LC2622WD device:
Installed matrix (LCD panel) MT215DW01.
To power the backlight lamps a converter combined with a power supply is used, controlled by the SG3525AN PWM controller.
The necessary supply voltages for all nodes of the SUPRA STV-LC2622WD TV are generated by the MIP260B power module or its analogs using L6561D, F9222L, KA3525A microcircuits and 13N50C type power switches.
MainBoard - the main board (motherboard) is a CVMV26L-A-20 module, using TSUMV26KE-LF, 24C32, EN25F40-100GCP chips, and others.
The F21WT-3BAR-E tuner provides reception of television programs and tuning to channels.
Information from an alternative source:
SUPRA STV-LC2622WD Version V2J11
Panel Type (Matrix): M260TWR1,
Motherboard:T.MT8223.3B 10285, 25Q16BVSIG, 432A-2GLI (24C32), IT6633E-P, R2A15122, CBT3257AD х2, CD4052, Tuner: F20WT-3DDR-E
PSU & Invertor: MIP260K-HA rev 1.0, LD7576AGR, 2SK3115, MP1006ES, D454A х2, D413A, AO4616
Additional technical information about the panel:
Brand: INNOLUX
Model: MT215DW01 V.3
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 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 70%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0VOLT.
LCD TV SUPRA STV-LC2622WD with LCD MT215DW01, diagonal size 26 "(66 cm) 16: 9. Brightness of the screen of 500 cd / m² is provided by backlighting CCFL (EEFL) fluorescent lamps. Contrast is the ratio of maximum brightness to minimum 1000: 1 Dynamic contrast ratio of 2000: 1 achieved by special control of the backlight It is possible to view broadcasts and films and images in high quality HD at a resolution of 1366x768 pixels in a graphic resolution of 720p (HD Ready) .Input high-frequency or video signal is decoded in analog systems PAL , SECAM, NTSC Graphic processing and digital signal shaping takes place in 480i, 480p, 576i, 576p, 720p, 1080i standards Supported multimedia file formats: MP3, VideoCD, SVCD, JPEG.
The power of the sound system 16 W (2x8 W) provides 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, audio x3, S-Video, component, SCART x2, RGB, VGA, HDMI x2, USB. 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.
The power consumed by the TV in operating mode from the network is 120 watts.
Overall dimensions: 665x478x210 mm.
TV Weight: 12.6 kg.
Attention! SUPRA STV-LC2622WD LCD TV panel MT215DW01 is the most expensive component.
Avoid hitting the glass and exerting pressure on the screen surface to avoid permanent damage to the LCD panel!