Technical description and composition of the SUPRA STV-LC3215W TV, panel type and modules used. The composition of the modules.SUPRA
Model: STV-LC3215W STV-LC3215WD
Chassis / Version: V6L06
Panel: LTA320AP29 // T315CK07-BW2 // LTA-320AP05 - LTI320AP01
Inverter (backlight): integrated into PSU
PWM Inverter: OB3316NQP, LM393
Power Supply (PSU): LKP-PI018 - LK-PI320402D // LK-OP416001A
PWM Power: L6562A (PFC), LD7575PS
MainBoard: CV182H-F
IC MainBoard: 25Q32BVS, CAT6354CQ, TPA3110LD2,
Tuner: CDT-3SP5I2-37 // AFT7 / W110G
STV-LC3215W Specifications
SUPRA STV-LC3215W
General recommendations for TV LCD repair
Repair of a SUPRA TV with a CV182H-F chassis should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before starting the necessary measurements. Swollen electrolytic or metal-ceramic capacitors, charred resistors, ring cracks in the soldering of the element leads - all this can significantly help the master to determine the causes and consequences of the malfunctions in the TV.
Sometimes the SUPRA STV-LC3215W 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 works, check the processor batteries on the SSB (Main Board). 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. It is necessary first of all to check the diodes of the rectifier bridge of the mains voltage and the power switch (s) of the converter.
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 you turn 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 inverter (backlight power converter). In such cases, the lamps, the inverter and the common power module must be checked, in which the electrolytic capacitors of the rectifier filter supplying the inverter must be checked.
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.
Diagnostics and repair of the CV182H-F motherboard is carried out by checking the functionality of the stabilizers or power converters of the module chips. In some cases, a software update is required. 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 - 25Q32BVS, CAT6354CQ, TPA3110LD2, Tuner - CDT-3SP512-37 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.
Owners of the STV-LC3215W TV are advised to contact only qualified specialists with experience for repair! Attempts to repair yourself without the appropriate knowledge and skills can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ----- psu --------> LKP-PI018 - LK-PI320402D
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC3215WD, Main: T.VST59S.21, Panel: 720p HD, 1366x768
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC3215W V6L06, Main: CV182H-F, Panel: T315CK07-BW2
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC3215W Main Board: T.MS6M48.1C 10512, Spi Flash: MX25L3205, Panel: TC315B506
STV-LC3215W VER: V4K12, 000 DRIMS,
Main: CV182H-F, Panel: LTA-320AP05 - LTI320AP01, Inverter: SSI320_4UA01.
PSU: LK-OP416001A - OB2273 (STB), L6599AD (PWM RESONANT), FAN7530 (PFC)
Additional MainBoard Repair
The appearance of the MainBoard CV182H-F is shown in the figure below:
CV182H-F
The CV182H-F motherboard uses the MST6M182VG processor, combined with a scaler and installed using BGA technology.
It is advisable to start repairing this type of MainBoard with checking the voltage converters and linear stabilizers required to provide power to the processor units: 1.2V, 2.5V, 3.3V. Check the power supply of the LCD panel 5V or 12V, depending on the type of panel used, it is advisable directly on the LVDS connector. If, in the presence of the necessary supply voltages, the TV does not come out of Stand-by mode, does not respond to the remote control and control buttons, you should update the SPI Flash software.
CV182H-F can be used in TVs:
FUSION FLTV-32H18 (Panel T315CK07-BW2), FUSION FLTV-3218B (Panel T315CK06-PW1), SUPRA STV-LC3215W STV-LC3215WD (Panel LTA320AP29), SUPRA STV-LC4215DF (Panel T420HW05 V.0 ).
External view of the power supply
Main features of SUPRA STV-LC3215W device:
Installed matrix (LCD panel) LTA320AP29 or T315CK07-BW2 or LTA-320AP05 - LTI320AP01.
A converter combined with a power supply is used to power the backlight lamps, it is controlled by the OB3316NQP, LM393 PWM controller.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC3215W TV is carried out by the LKP-PI018 power module, or its analogs using L6562A (PFC), LD7575PS microcircuits.
MainBoard - the main board (motherboard) is a CV182H-F module, using 25Q32BVS, CAT6354CQ, TPA3110LD2, and others.
Tuner CDT-3SP5I2-37 // AFT7 / W110G provides reception of television programs and tuning to channels.
Information from an alternative source:
SUPRA STV-LC3215W Version V4K12
Panel type (matrix): LTI320AP01
Motherboard: CV181H-F, Tuner: AFT7 / W110G,
Invertor: SSI320_4UA01
PSU: LK-OP416001A
Remote control: RC3b Operation Manual
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320AP29-W
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 20 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
SUPRA STV-LC3215W LCD TV with LTA320AP29 LCD, 32 "(81 cm) 16: 9 format diagonal. 480 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Contrast is the ratio of maximum brightness to minimum brightness 3000: 1 Dynamic contrast ratio of 8000: 1 is 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 the 720p graphics standard (HD Ready) .Input high-frequency or video signal is decoded in analog PAL systems , SECAM, NTSC Graphic processing and digital signal shaping takes place in 480i, 480p, 576i, 576p, 720p, 1080i standards Supported multimedia file formats: MP3, MPEG4, JPEG.
Speaker power 20 W (2x10 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, S-Video, component, SCART, RGB, VGA, HDMI x4, USB. 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.
The power consumed by the TV in operating mode from the network is 90 watts.
Overall dimensions: 800x590x215 mm.
TV weight: 13.4 kg.
Attention! The LTA320AP29 panel of the SUPRA STV-LC3215W LCD TV is the most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel!