Technical description and composition of the SUPRA STV-LC32880WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC32880WL
Chassis / Version: TP.VST59.P83D
Panel: HE315GH-E77GM \ PW1
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
Power Supply (PSU): integrated into MainBoard
PWM Power: LD7536
MOSFET Power: N-FET 600V 7A
MainBoard: TP.VST59.P83D (32A300J_XE_TU CXD)
IC MainBoard: CPU TSUMV59XE, Flash 25Q32
Tuner: CDT-3NP5i1-10
STV-LC32880WL Specifications
SUPRA STV-LC32880WL
General recommendations for TV LCD LED repair
SUPRA STV-LC32880WL, like other TVs, it is advisable to start repairing by inspecting external and internal elements and modules. Visible damage to elements can sometimes indicate the direction of searching for a defect even before the necessary measurements are taken. If charred resistors, swollen electrolytic or sintered capacitors, ring cracks in the soldering of the terminals of transformers or heating elements are found, it is advisable to establish the causes and consequences of the malfunction, as well as to check the connected elements and assemblies.
Malfunctions of a power supply module can be expressed in different ways, for example, SUPRA STV-LC32880WL does not turn on at all and the control lamps on its front panel do not light up or blink, all signs of operability are absent. It should be noted that the processor power regulator (converter) may be faulty with the same external manifestations. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. If it breaks, the power elements of the transistors and diodes of the rectifier bridge should be checked for avalanche (thermal) breakdown.
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 SUPRA STV-LC32880WL has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the LED circuit of the backlight of the HE315GH-E77GM \ PW1 panel, or their power converter - LED driver. Sometimes, when turned on, the image appears and immediately disappears. In such cases, it is necessary to check the electrolytic capacitors of the power supply filter of the LED driver itself, including in the secondary rectifier of the main power supply unit.
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.
An open circuit in the LED rows connected in series cannot be detected with a multimeter or tester without disassembling the panel. It takes several tens of volts to open all the junctions, and it is best to use a current source for such purposes.
In cases of attempts to repair the motherboard TP.VST59.P83D (32A300J_XE_TU CXD), it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
Repair of the board and replacement of CPU TSUMV59XE, Flash 25Q32 microcircuits are performed with the necessary equipment and the corresponding element base. Malfunctions associated with the use of BGA soldering technologies can be localized by warming up.
Owners and users of the SUPRA STV-LC32880WL TV should remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that can lead to complete non-repairability of the device!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> : Service manual and sсhematic diagram TP.VST59.P83-65W18
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC32880WL, Main: TP.VST59.P83D (32A300J_XE_TU CXD), Panel: HE315GH-E77GM\PW1
The TP.VST59.P83 motherboard is combined with a power supply module and is an independent device based on the TSUMV59Xxx multifunctional processor. Repair of such a board must begin with checking the power supply elements, as well as the operability of voltage converters and linear stabilizers necessary to provide power to certain processor nodes, in particular: core power supply + 1.2V, built-in DDR + 1.8V memory and stand-by mode node by 3.3V. The supply voltage of the LCD panel is 5V or 12V, depending on the type of panel used, it is necessary to check directly on the LVDS connector.The appearance of MainBoard TP.VST59.P83 and voltage measurements at test points are shown in the figure below:
TP.VST59.P83
Main features of SUPRA STV-LC32880WL device:
Installed matrix (LED panel) HE315GH-E77GM \ PW1.
To power the backlight LEDs, a converter combined with the TP.VST59.P83D main board is used, controlled by the OB3350CP PWM controller.
The power module is combined with the MainBoard and is made according to the AC / DC flyback converter circuit using LD7536 microcircuits and N-FET 600V 7A power switches.
MainBoard - the main board (motherboard) is a TP.VST59.P83D module, using CPU TSUMV59XE, Flash 25Q32 and others.
The CDT-3NP5i1-10 tuner provides reception of television programs and tuning to channels.
SUPRA LED TV STV-LC32880WL with LCD display HE315GH-E77GMPW1, 32 "(81 cm) 16: 9. operation of LEDs depending on the illumination of 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 and films and images in high quality HD at a resolution of 1366x768 pixels in the standard graphic resolution 720p (HD Ready) The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC Graphic processing and digital signal shaping takes place in the 480i, 480p, 576i, 576p, 720p, 1080i standards Supported multimedia file formats: MP3, JPEG.
Speaker power of 16 W (2x8 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.
Dimensions: With stand 737x500x198 mm, Without stand 737x446x60 mm.
Attention! The panel HE315GH-E77GMPW1 of the SUPRA STV-LC32880WL 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.