Technical description and composition of the SUPRA STV-LC32520WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC32520WL
Chassis / Version: V1L11, V1L12, V2M12, ...
Panel: HV320WX2-261 // T320XVN02.0
LED backlight: 32D7-LIGHT-BAR-PCB 6003050414 3x5LED
LED driver (backlight): integrated into PSU; 42V / 15LED
PWM LED driver: OB3362RP
MOSFET LED driver: AOD4454
Power Supply (PSU): HKC-PL05 Rev.1.0 HKC-LEDTV-P32-11 // HKL-320201 D03
PWM Power: NE1101B
MainBoard: T.MS18VG.72 T.VST59.A5 // CV59SH-J
IC MainBoard: CPU: TSUMV59XU-Z1, SPI FLASH: W25Q32
Tuner: CDT-3NP5 / 1-10
Control: Login to the service: MENU 1147
STV-LC32520WL Specifications
SUPRA STV-LC32520WL
General recommendations for TV LCD LED repair
SUPRA STV-LC32520WL TV, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. 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. Charred paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering on the leads of heating elements or transformers can often suggest the causes of the defect and possible consequences.
Sometimes the SUPRA STV-LC32520WL 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, you need to check the processor batteries on the SSB (Main Board). Diagnostics and repair of the common power supply should always begin with checking the mains fuse and the condition 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.
Power switches in switching power supplies (SMPS) fail for no reason very rarely and, in case of their breakdown, it is necessary to look for a malfunction in the stabilization circuits, checking electrolytic capacitors, semiconductor devices and resistors in the primary circuit. The reason may be a malfunction of the PWM regulator microcircuit, which can only be checked by replacing it with a new or 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 a malfunction of the LED driver (the power converter for the backlight LEDs of the HV320WX2-261 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.
In most cases when there is no backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or more LEDs do not work in one line, therefore, they are punctured and should be replaced.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or microcircuit power converters and, if necessary, update the software (software).
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: TSUMV59XU-Z1, SPI FLASH: W25Q32 requires the necessary training and professional skills to repair modules at the component level. Problems associated with BGA soldering technologies can be diagnosed by the warm-up method.
If there is no tuning to the local TV channels, you should make sure that the supply voltage of the varicaps (30-33V) and other supply voltages are present at the CDT-3NP5 / 1-10 tuner terminals.
Attention to the owners! Attempts to repair the SUPRA STV-LC32520WL TV yourself are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32520WL (V1L11), Main T.MS15V6.72, Panel: HV320WX2-261
model SUPRA STV-LC32520WL V1L12:
panel: T320XVN02.0, Tuner: CDT-3NP5I1-10
MAIN: T.MS18VG.72 T.VST59.A5; TPA3110D2, IT6633E-P, SGM-330A-YQS
T-CON: TS5532T24C08-2BB; P301-30, AAT1908, AAT1908, AUO-11303, RM5101
PSU & LED Driver: HKC-PL05 Rev.1.0; U1-NE1101B, U4-OB3362RP
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32520WL V1L12, panel: T320XVN02.0, Main T.MS18VG.72
model SUPRA STV-LC32520WL V2M12, Panel: HK315WLEDM-HHZ5H.
Main: CV59SH-J (TSUMV59XUS-Z1, CD25Q32B, SGM330A, TPA3110LD2), Tuner: CDT-3NP512-10,
Power: HKL-320201 D03 (LD7537, OB3350CP, KF7N05, ME15N10-G, ME20P03, M3014D).
T-CON: MDK336V-0 W; TCON107A-F, BD8161, BUF12800.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32520WL V2M12, Main: CV59SH-J, Panel: HK315WLEDM-HHZ5H
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 OB3362RP (TSOP16) controller, increase the total resistance of the resistors from pin 5 (ISET) to the case. The maximum current in each of the four channels (in milliamperes) for the resistor Rset (in kilo-ohms) is determined from the ratio 3000 * 1.2V / Rset.
Additional MainBoard RepairThe MainBoard CV59SH-J is shown in the figure below:
CV59SH-J
External view of the power supply
Main features of SUPRA STV-LC32520WL device:
Installed matrix (LED panel) HV320WX2-261 or T320XVN02.0.
A converter combined with a power supply is used to power the backlight LEDs, and is controlled by the OB3362RP PWM controller. The keys of the AOD4454 type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC32520WL TV is carried out by the HKC-PL05 power module, or its analogs using NE1101B microcircuits.
MainBoard - the main board (motherboard) is a T.MS18VG.72 module, using CPU chips: TSUMV59XU-Z1, SPI FLASH: W25Q32 and others.
The CDT-3NP5 / 1-10 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: BOE
Model: HV320WX2-261
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: 5.9% (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
LED TV SUPRA STV-LC32520WL with LCD T320XVN02, 32 "(81 cm) 16: 9. 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 occurs in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards Supported multimedia file formats: MP3, 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, VGA, HDMI x3, 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, 1360x768.
The power consumed by the TV in operating mode from the network is 60 watts.
Overall dimensions: 738x495x209 mm.
TV weight: 6.6 kg.
Attention! SUPRA STV-LC32520WL LED TV panel T320XVN02 001 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.