Technical description and composition of the SHIVAKI STV-32LED5 TV, panel type and applicable modules. The composition of the modules.SHIVAKI LED
Model: STV-32LED5
Panel: HV320WX2-201
LED backlight: YP 37020575 2 * 36 led
LED driver (backlight): integrated into PSU
PWM LED driver: BIT3251
MOSFET LED driver: AOD478
Power Supply (PSU): MP022-N // MP022-L
PWM Power: LD7750RGP
MainBoard: T.MS18VG.A1B
IC MainBoard: SPI Hlash: Winbond 25Q32BSIG, HDMI Control: IT6633E-P
Technical Specifications STV-32LED5
SHIVAKI STV-32LED5
General repair guidelines for TV LCD LED
It is advisable to start the repair of the SHIVAKI STV-32LED5 TV with a careful external examination of both internal and external elements. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of the already known typical malfunction.
In cases where the SHIVAKI STV-32LED5 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the MP-022 power supply module is most likely faulty -L or there is no processor power on the motherboard (a typical defect of some SHIVAKI TVs). First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller LD7750RGP, which can be checked only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
Sometimes the SHIVAKI STV-32LED5 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the HV320WX2-201 panel backlight LED converter, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the LED driver itself, including in the power supply unit (power supply unit).
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - T.MS18VG.A1B and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Attention to the owners! Attempts to repair the TV SHIVAKI STV-32LED5 by yourself are not recommended by the manufacturer and can lead to serious negative consequences!
The appearance of MainBoard T.MS18VG.A1B is shown in the figure below:T.MS18VG.A1B
The appearance of the power supply
Main features of the SHIVAKI STV-32LED5 device:
Installed matrix (LED-panel) HV320WX2-201.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a BIT3251 PWM controller. As the power elements of the LED driver, keys of the AOD478 type are used.
The necessary supply voltages for all nodes of the SHIVAKI STV-32LED5 TV are generated by the MP022-N power supply module or its analogs using LD7750RGP microcircuits.
MainBoard - the main board (motherboard) is a T.MS18VG.A1B module using SPI Hlash: Winbond 25Q32BSIG, HDMI Control: IT6633E-P and others.
Additional technical information about the panel:
Brand: BOE
Model: HV320WX2-201
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: 6.6% (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
TV SHIVAKI STV-32LED5 with LCD HV320WX2-201, diagonal size 32 "(81 cm) 16: 9 format. The required brightness of the screen 300 cd / m² is provided by LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 3000: 1. Edge LED backlighting is implemented in the LED-panel of this TV - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems . Emah PAL, SECAM, NTSC Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, WMA, MPEG4, DivX, JPEG.
The power of the sound system 16 W (2x8 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, VGA, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
Overall dimensions: With stand 732x486x200 mm, Without stand 732x438x47 mm.
TV Weight: 7.4 kg.
Attention! The HV320WX2-201 panel of the SHIVAKI STV-32LED5 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.