Technical description and composition of the SUPRA STV-LC3215F TV, panel type and modules used. The composition of the modules.SUPRA
Model: STV-LC3215F
Chassis / Version: Ver: V4K12
Panel: LTA320HN02 W02
Power Supply (PSU): LK-OP416001A
PWM Power: FAN7530 (PFC), L6599AD (PWM Resonant), OB2273 (PWM SOT23-6)
MOSFET Power: 12N50E, KF5N50, JCS2N65F
MainBoard: CV182H-S
IC MainBoard: PT8295AH, GSPDH924, NT5TU32M16DG-AC, CAT6354CQ, GA5G121, X50DV330
STV-LC3215F Specifications
SUPRA STV-LC3215F
General recommendations for TV LCD repair
SUPRA TV made on the Ver: V4K12 chassis, like many other electronic devices, it is advisable to start repairing with an inspection of all external and internal elements. Many visible changes in the state of elements make it possible to determine the further direction of troubleshooting and localization of the defect. 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 burnt out to coal dust and other external indirect signs.
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 LK-OP416001A power supply module is faulty and needs repair. Sometimes a problem with similar manifestations can occur only in the absence of processor power, which is typical for certain SUPRA models. The first step is to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse in the power supply is broken, in most cases a breakdown of the power switch (s) 12N50E, KF5N50, KF5N50, JCS2N65F is detected, which can be integrated with a PWM controller, or a separate field-effect transistor can be used. You should also check the diodes of the rectifier bridge and the electrolytic capacitor of the mains rectifier filter.
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, PWM controller FAN7530, L6599AD, 73B12 , which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If SUPRA STV-LC3215F has no picture, but there is sound and the TV is controlled from the remote control, a malfunction in the display backlight units is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when the TV is turned on, an image appears and immediately disappears. First of all, it is necessary to make sure that the electrolytic capacitors of the rectifier filter supplying the inverter are in good working order, and check the LCD lamps by connecting external and known good diagnostics to the connectors.
In most cases, the diagnostics and repair of the inverter is difficult due to the organization of protection, which turns it off in emergency cases in order to avoid fires when short circuits or breaks in high-voltage circuits and when lamps are depressurized. Repairers often block the protection circuits to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
Diagnostics and repair of the CV182H-S motherboard is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required. If it is not possible to replace the MB (SSB) board, it is necessary to check the serviceability of its elements - PT8295AH, GSPDH924, NT5TU32M16DG-AC, CAT6354CQ, GA5G121, X50DV330. Defective components must be replaced.
Owners and users of the SUPRA STV-LC3215F TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to the complete non-repairability of the device!
FLASH Supra STV-LC3215F (V3K05), MAIN T.MS6M48.1C (10512), FLASH MX25L3206D(U12), TUNER ET-6T1E-LF-108W-A, PANEL V315H1-L02
The STV-LC3215F model uses an LK-OP416001A power supply with a PFC (Power Factor Correction) node - an active filter of the highest harmonics of the consumed current. In fact, it is a step-up converter based on the FAN7530 PWM regulator, which excludes the charging current of the electrolytic capacitor of the mains rectifier filter directly from the mains through open diodes, when its charging current is determined by its reactance.As a result of the operation of the converter, the envelope of high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The serviceability of the PFC unit can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the network rectifier in operating mode.
External view of the power supply
Main features of SUPRA STV-LC3215F device:
Installed matrix (LCD panel) LTA320HN02 W02.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC3215F TV is carried out by the LK-OP416001A power module, or its analogs using FAN7530 (PFC), L6599AD (PWM Resonant), OB2273 (PWM SOT23-6) power switches and 12N50E, KF5N50 power switches , JCS2N65F.
MainBoard - the main board (motherboard) is a CV182H-S module, using microcircuits PT8295AH, GSPDH924, NT5TU32M16DG-AC, CAT6354CQ, GA5G121, X50DV330 and others.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320HN02-W
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: SVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 5.5%), Hard coating (2H)
Brightness: 430 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 72%
Response Time: 12/8 (Tr / Td); 8 (MPRT)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
SUPRA LCD TV STV-LC3215F with LCD V315H1-L02, 32 "(81 cm) 16: 9 diagonal. Screen brightness of 500 cd / m² is provided by CCFL (EEFL) fluorescent lamps. Contrast is the ratio of maximum brightness to a minimum of 6000: 1. Dynamic contrast ratio of 20,000: 1 is achieved by a special control of the backlight.Capabilities of the TV provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) .Input high-frequency or video signal is decoded into 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, 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, 1280x1024, 1360x768.
The power consumed by the TV in operating mode from the network is 180 watts.
Overall dimensions: 800x590x215 mm.
TV weight: 18 kg.
Attention! SUPRA STV-LC3215F LCD TV panel V315H1-L02 Rev C1 is the most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!