Technical description and composition of the SUPRA STV-LC3295WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC3295WL
Chassis / Version: V2K10 // V2L04
Panel: LC320EXN (SD) (A1) // LTA320AN01
LED backlight: 3660L-0386A = LG lnnotek V6 32INCH HD
T-CON: LC320EXN P / N: 6870-0370A; TL2345M6, MAXIM9668, TPS65194, TPS65170, 404RP
LED driver (backlight): 6977L-0072A
PWM LED driver: BD9262EFV
Power Supply (PSU): KPS-L070C2-01
PWM Power: FAN6755
MOSFET Power: 7N60L
MainBoard: KDL32MS95A-L-SDA1 / GKGS12-0088121104972
IC MainBoard: 45S5162GFR, R2A15120, ZSD1451, IT6633E-P, K24C04 K24C64, MP2307DM, ME9435A, AP2146A
STV-LC3295WL Specifications
SUPRA STV-LC3295WL
General recommendations for TV LCD LED repair
It is advisable to start repairing a SUPRA STV-LC3295WL TV with a careful external examination of both internal and external elements. According to some external signs of a change in the state of some elements, sometimes it becomes possible to make assumptions about the nature of the defect, as well as to determine the further direction of troubleshooting. In some cases, defective elements are visible to the naked eye, for example, charred resistors or swollen sintered capacitors, or electrolytic ones in rectifier filters. The formed ring cracks in the soldering of the terminals of transformers or heating circuit elements are also frequent sources of many malfunctions with a variety of external manifestations.
In the case when the STV-LC3295WL does not turn on, does not respond to the remote control and front panel buttons, does not blink lights and does not show any signs of operability, the power module is probably faulty in this case. If it is working properly with such manifestations, it is necessary to check the processor power regulator (converter) on the motherboard. Diagnostics and repair of the common power supply should always begin with checking the mains fuse and the state 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 breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the mains rectifier, as well as the large electrolytic capacitor of the mains rectifier filter.
In most cases, breakdowns of keys in switching power supplies (SMPS) do not occur without 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 broken resistors or punctured semiconductor elements in the stabilization circuits. Possible defect of the PWM chip from the manufacturer.
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 a malfunction of the LED driver (power converter for the LED backlight of the LTA320AN01 panel). In such cases, the common power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
It is often necessary to disassemble the panel to check the health of the LEDs, as well as the contact connections in the connectors and solders.
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.
The motherboard 35015556 must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or is on continuously. In such cases, if the converters or power regulators of the microcircuits are working, it may be necessary to update the software.
In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its FLASH chips: W25Q64BV (N506) and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
Attention to users! Self-repair of the SUPRA STV-LC3295WL TV without appropriate qualifications and experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> STV-LC3295WL (V2K10), Panel: LTA320AN01
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL PSU ------------------> KPS-L070C2
In case of malfunctions in the SPI FLASH software manufactured by Winbond, sometimes they can temporarily restore their performance after temperature exposure, for example, warming up with a soldering station or a lighter. This is often enough to be able to read the standard software content. The microcircuit after that must be replaced with a new one.
To reduce the backlight current in LED drivers with a BD9262EFV controller, you should proportionally increase the total resistance of the resistors from pin 23 (ISET) to the case.External view of the power supply
Main features of SUPRA STV-LC3295WL device:
Installed matrix (LED-panel) LC320EXN (SD) (A1) or LTA320AN01.
Matrix control uses the LC320EXN Timing Controller (T-CON).
The LED driver 6977L-0072A is used to power the backlight LEDs, controlled by the PWM controller BD9262EFV.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC3295WL TV is carried out by the KPS-L070C2-01 power module, or its analogs using FAN6755 microcircuits and 7N60L power switches.
MainBoard - the main board (motherboard) is a KDL32MS95A-L-SDA1 module, using 45S5162GFR, R2A15120, ZSD1451, IT6633E-P, K24C04 K24C64, MP2307DM, ME9435A, AP2146A and others.
Information from an alternative source:
SUPRA STV-LC3295WL Version V2L04 Clone: THOMSON T32E97DU
Panel type (matrix): LC320EXN (SD) (A1),
Motherboard: KB-6160 Rev00 Sticker: KDL32MS95A-L-SDA1 / GKGS12-0088121104972, 45S5162GFR x2, R2A15120, ZSD1451, IT6633E-P, K24C04, K24C64, 35024 x3, MP2307DM3, ME9435A
T-con: LC320EXN P / N: 6870-0370A, TL2345M6, MAXIM9668, TPS65194, TPS65170, 404RP
LED Driver: 6977L-0072A, BD9262EFV
PSU: KPS + L070C2-01 P / N: * 35015968 POWER SOPPLY: 34007873, FAN6755, 7N60L
Additional technical information about the panel:
Brand: LG Display
Model: LC320EXN-SDA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 380 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
LED TV SUPRA STV-LC3295WL with LCD display LC320EXN, diagonal size 32 "(81 cm) 16: 9. The required brightness of the screen of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 80,000: 1 is achieved by special LED control depending on the illumination of the areas in the scene.This model uses an LED-panel with an edge arrangement of backlighting LEDs - Edge LED.It is possible to view broadcasts, films and images in high quality HD at a resolution of 1366x768 pixels in the standard graphic resolution 720p (HD Ready). 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, 1080p standards.Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG ...
Speaker power 10 W (2x5 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 x2, audio x3, component, VGA, HDMI x4, 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, 1280x1024, 1360x768. The digital tuner is capable of receiving TV channels in DVB-T MPEG4 standards.
The power consumed by the TV in operating mode from the network is 95 watts.
Dimensions: With stand 771x545x240 mm, Without stand 771x493x46 mm.
Attention! Panel LC320EXN (SD) (A1) SUPRA LED TV STV-LC3295WL 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.