Technical description and composition of the SUPRA STV-LC3277WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC3277WL
Chassis / Version: ver.V2K07
Panel: CH315BT-A02 rev. 01 ROHS
T-CON: V315B6-XC01, CM501, N161, 18B01D-70G, H048
LED driver (backlight): ER640 rev 1.0
PWM LED driver: B22924
Power Supply (PSU): FSP115-4HZ01
PWM Power: SSC9512S
MainBoard: T.MS6M48.3B 10423
IC MainBoard: R2A15122, BL3257, MP1482DH, 25L320F, NT5TU32M16DG-AC
Tuner: TDQ-ATF27WT-F
STV-LC3277WL Specifications
SUPRA STV-LC3277WL
General recommendations for TV LCD LED repair
Any repair usually begins with an external inspection. Often, according to certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before taking the necessary measurements, which will determine a further algorithm for troubleshooting and localizing a defect. 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 are on or blinking. 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 FSP115-4HZ01 power supply module is faulty and needs repair. Sometimes, with similar manifestations, a problem can occur only in the absence of standby power supply. When repairing a power supply, it is advisable to start diagnostics with checking the mains fuse and electrolytic capacitors of the filters of the secondary rectifiers of the converter. In the event of a break in the fuse, the cause should be sought in the power semiconductor elements of the pulse converter of the main power supply unit. First of all, it is necessary to check the diodes of the rectifier bridge of the mains voltage and the power switch (keys) of the converter. The complete inoperability of the power supply unit can be caused by a short circuit of the power elements in the primary circuit followed by a break in the fuse, or a short circuit in the loads.
As a rule, switches in switching power supplies (SMPS) are quite reliable and rarely fail without reasons that should be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM microcircuit is checked by replacing it with a known good one.
If, when turning on the TV, the image appears and immediately disappears, or is absent initially when turned on, but there is sound and other functions work, there is a high probability of malfunction of the display backlight LEDs, or the LED driver (power converter of the panel backlight unit CH315BT-A02 rev.01 ROHS).
The lack of backlighting often occurs due to an open circuit in the LED circuit. It becomes necessary to disassemble the panel and check the LEDs themselves, as well as the contact connections in the connectors and the ration of the connector pins.
An open circuit in the LED rows connected in series cannot be detected with a multimeter or tester without disassembling the panel. It takes several tens of volts to open all the junctions, and it is best to use a current source for such purposes.
Repair or diagnostics of the T.MS6M48.3B 10423 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update the software (software).
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 - R2A15122, BL3257, MP1482DH, 25L320F, NT5TU32M16DG-AC 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.
The malfunction of the TDQ-ATF27WT-F tuner is established after checking the software and all supply voltages at its outputs.
Attention to the owners! Attempts to repair the SUPRA STV-LC3277WL TV yourself are not recommended by the manufacturer and can lead to serious negative consequences!
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The appearance of the MainBoard T.MS6M48.3B is shown in the figure below:
T.MS6M48.3B
T.MS6M48.3B can be used in TVs:
SUPRA STV-LC3277WL (Panel CH315BT-A02 rev.01 ROHS), SUPRA STV-LC2677WL (Panel HT260WX2-101).
Main features of SUPRA STV-LC3277WL device:
Installed matrix (LED-panel) CH315BT-A02 rev.01 ROHS.
Matrix control uses Timing Controller (T-CON) V315B6-XC01.
The LED driver ER640 is used to power the backlight LEDs, controlled by the PWM controller B22924.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC3277WL TV is carried out by the FSP115-4HZ01 power module, or its analogs using SSC9512S microcircuits.
MainBoard - the main board (motherboard) is a T.MS6M48.3B module, using chips R2A15122, BL3257, MP1482DH, 25L320F, NT5TU32M16DG-AC and others.
The TDQ-ATF27WT-F 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-LC2677WL
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
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.