Technical description and composition of the SUPRA STV-LC3277W TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC3277W
Chassis / Version: V4L10
Panel: HV320WX2-201
LED backlight: YP 37020575 2 * 36 led
MainBoard: T.MS18VG.81B 12145
IC MainBoard: 25Q32BSIG, HDMI - IT6633E-P, Sound - TPA3110D2, DC / DC - AIC2857F
Tuner: CDT-3SP5I2-36
Control: Login to the service: MENU-1-1-4-7
STV-LC3277WL Specifications
SUPRA STV-LC3277W
General recommendations for TV LCD LED repair
Repair of electronic equipment usually begins with its external examination and diagnosis of a malfunction. In this case, you should inspect all the internal components of the SUPRA STV-LC3277W TV, as well as the external elements of the case. Often, by the visible signs of a change in the state of some elements, one can judge the causes of the defect. Electrolytic capacitors of filters with a swollen case, as well as ring cracks formed in the soldering of the leads of heating elements or a layer of coal on burned out resistors sometimes prompt the repairman about the causes of the malfunction and the possible consequences.
Sometimes the SUPRA STV-LC3277W TV just won't turn on. No control lamps on the front panel are on or blinking, the TV does not respond to the remote control and does not emit any sounds or any signs of life when turned on. The most likely cause of a malfunction is the failure of the common power module. If it is working properly, it is necessary to check the standby power cells on the Main Board. In general, first of all, it is necessary to check the electrolytic capacitors of the filters of the secondary rectifiers and the fuse at the mains input. If it is cut off, then the diodes of the rectifier bridge and the key transistor of the converter, which can be located either on a separate heatsink or integrated with a PWM controller into a common microcircuit, should be checked for a breakdown of PN junctions. Options are possible.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (SMPS) it does not fail by itself without reasons that should be looked for by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If, when SUPRA STV-LC3277W is turned on, there is no image, or it appears and immediately disappears, but there is sound, most likely there is a malfunction in the LED circuit of the backlight of the HV320WX2-201 panel, or in the LED driver unit - their power converter.
To check the health of the LEDs and contact connections in their power supply circuit, it is necessary to disassemble the panel.
When diagnosing, it must be borne in mind that it is impossible to check for an open circuit in the LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally a current source.
Repair of the motherboard T.MS18VG.81B 12145 must begin with diagnostics and testing of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Often the MB (SSB) board needs to be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - 25Q32BSIG, HDMI - IT6633E-P, Sound - TPA3110D2, DC / DC - AIC2857F and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
If the TV operates normally from external devices, but does not tune to TV channels, the CDT-3SP5I2-36 tuner may be faulty. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. Sometimes the reason for the inoperability of the tuner may be a software failure.
We remind users again! Attempts to repair the SUPRA STV-LC3277W TV without proper qualifications and experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> STV-LC3277W CHASSIS: V4L10
In cases where there was a failure in the SPI FLASH software produced by Winbond, we recommend replacing the microcircuit with a new one. Often faulty Winbond microcircuits can temporarily restore their operability after temperature exposure, for example, when a soldering station is heated by a hairdryer. Sometimes this is enough to read the standard software content.
Additional MainBoard Repair
The appearance of the MainBoard T.MS18VG.81B is shown in the figure below:
T.MS18VG.81B
T.MS18VG.81B can be used in TVs:
AKAI LEA-32V07P (Panel T315XW06 V.0), BBK LEM3283 V1.0 (Panel LC320EXN SDA1), BBK LEM3283F (Panel V315H3-LE4 Rev.C1), ERISSON 42LEN60 (Panel LC420EUN), ERISSON 32LEN60 (Panel LTA320AN01 D02 ), FUSION FLTV-32H20B (Panel LM315TA-T01), SUPRA STV-LC3217W (Panel LC320WXE-SBV1), SUPRA STV-LC3217AWL STV-LC3217W (Panel HV320WX2-201), SUPRA STV-LC3277W (Panel HV320WX2-201), SUPRA STV-LC32170F (Panel HK315TVM-HHC9H).
Main features of SUPRA STV-LC3277W device:
Installed matrix (LED-panel) HV320WX2-201.
The necessary supply voltages for all nodes of the SUPRA STV-LC3277W TV are provided by a switching power supply.
MainBoard - the main board (motherboard) is a T.MS18VG.81B module using 25Q32BSIG microcircuits, HDMI - IT6633E-P, Sound - TPA3110D2, DC / DC - AIC2857F and others.
The CDT-3SP5I2-36 tuner provides reception of television programs and tuning to channels.
Information from an alternative source:
Supra STV-LC3277WL ver.V2K07 Same chassis for: SUPRA STV-LC3277W
Panel type (matrix): CH315BT-A02 rev. 01 ROHS
Motherboard: T.MS6M48.3B 10423, R2A15122, BL3257, MP1482DH, 25L320F, NT5TU32M16DG-AC, Tuner: TDQ-ATF27WT-F
T-con: V315B6-XC01, CM501, N161, 18B01D-70G, H048
Invertor: ER640 rev 1.0, B22924
PSU: FSP115-4HZ01, SSC9512S
Additional technical information about the panel:
Brand: BOE
Model: HV320WX2-201
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AFFS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 6.6% (with Polarizer)
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
SUPRA LED TV STV-LC3277WL with LCD CH315BT-A02, diagonal size 32 "(81 cm) 16: 9 format. The required screen brightness of 450 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum brightness to minimum is 3000: 1. Dynamic contrast ratio of 60,000: 1 is achieved by special control of the LEDs depending on the illumination of areas in the scene. The display technology of the model uses LED LED backlight. It is possible to view broadcasts and films and images in high quality HD at a resolution of 1366x768 pixels in the graphic standard 720p (HD Ready) input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC Graphic processing and digital signal shaping occurs in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards Supported media file formats: MP3 , WMA, MPEG4, MKV, JPEG.
Speaker power 12 W (2x6 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, audio x2, component, SCART, VGA, HDMI x2, USB x2. 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, 1360x768.
The power consumed by the TV in operating mode from the mains is 100 watts.
Dimensions: With stand 735x490x190 mm, Without stand 735x450x55 mm.
TV weight: 8.5 kg.
Attention! Panel CH315BT-A02 rev. 01 ROHS LED TV SUPRA STV-LC3277WL is an expensive and unreliable element.
Do not allow any impacts on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV non-repairable.