Technical description and composition of the SUPRA STV-LC32K790WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC32K790WL
Chassis / Version: T.VST59.A5
Panel: HK315LEDM // HV320WX2-261
T-CON: 19100209 MDK336V-0W
LED driver (backlight): integrated into PSU
PWM LED driver: OB3362RP
MOSFET LED driver: AOD4454
Power Supply (PSU): HKC-PL05 REV: 1.0
PWM Power: NE1101B
MainBoard: T.MS18VG.72 (T.VST59.A5)
IC MainBoard: CPU TSUMV59XE, Flash 25Q32
Tuner: CDT-3NP5i1-10
Control: IR: 6003120090 19-42v3-ir-v2.0
STV-LC32K790WL Specifications
SUPRA STV-LC32K790WL
General recommendations for TV LCD LED repair
Repair of electronic devices, including the SUPRA STV-LC32K790WL TV, it is advisable to start with an external examination of its external and internal elements. Visible damage to elements can sometimes indicate the direction of searching for a defect even before the necessary measurements are taken. 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.
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 or any signs of operability when turned on, there is a certain probability that the power 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. 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.
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.
In cases where the SUPRA STV-LC32K790WL TV has lost the image, but there is sound and all other functions are operational, there is a possibility of a malfunction of the LED driver (the converter for powering the backlight LEDs of the HK315LEDM panel). When you turn on the TV, the image may appear briefly and immediately disappear. It should be borne in mind that with such manifestations, the LEDs themselves fail.
Often, in the absence of backlighting, disassembly of the panel is required. It is necessary to check the serviceability of the LED transitions, as well as the reliability of the contact connections in the lines and connectors.
To check the LED strips for breakage without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter; a voltage of the order of several tens of volts is required.
Repair or diagnostics of the motherboard T.MS18VG.72 (T.VST59.A5) should start with checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
If it is not possible to replace the MB (SSB) board, it is necessary to check the serviceability of its elements - CPU TSUMV59XE, Flash 25Q32. Defective components must be replaced.
If you suspect a malfunction of the CDT-3NP5i1-10 tuner, first of all, you need to make sure that there is a supply voltage at the corresponding output of the tuner.
Owners of the STV-LC32K790WL TV are recommended 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 FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32K790WL, Main: T.MS18VG.72 (T.VST59.A5), Panel: HK315LEDM
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.
The appearance of the MainBoard T.VST59.A5 is shown in the figure below:
T.VST59.A5
T.MS18VG.72 can be used in TVs:
SUPRA STV-LC32800AWL (Panel HV320WX2-201 (HK315LEDM-BHA4H)), SUPRA STV-LC32520WL (Panel T320XVN02 001 HK315WLEDM-AHJ8H), SUPRA STV-LC32790WL (Panel HK315LEDM-BH81H(HV320WX2-261)), SUPRA STV-LC46500FL (Panel V460HJ1-PE1), SUPRA STV-LC32510WL (Panel 720p HD 1366x768), SUPRA STV-LC39520FL (Panel V390HJ1-P02 HK390LEDM-CH06H), SUPRA STV-LC32K800WL (Panel HV320WX2-201), SUPRA STV-LC42790FL (Panel HK420LEDM-AH17H), SUPRA STV-LC32K790WL (Panel HK315LEDM), SUPRA STV-LC32520AWL (Panel 720p HD 1366x768), SUPRA STV-LC42K790FL (Panel 1080p Full HD 1920x1080), SUPRA STV-LC32800WL (Panel HK315WLEDM-BHA4A).
External view of the power supply
Main features of SUPRA STV-LC32K790WL device:
Installed matrix (LED panel) HK315LEDM or HV320WX2-261.
Matrix control uses Timing Controller (T-CON) 19100209.
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-LC32K790WL 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 TSUMV59XE, Flash 25Q32 and others.
The CDT-3NP5i1-10 tuner provides reception of television programs and tuning to channels.
LED TV SUPRA STV-LC32K790WL with LCD HK315LEDM, 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, 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.
Overall dimensions: 736x502x205 mm.
TV weight: 7.28 kg.
Attention! The HK315LEDM panel of the SUPRA STV-LC32K790WL LED TV 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.