Technical description and composition of the TV SHIVAKI STV-24LEDG9, type of panel and applicable modules. The composition of the modules.SHIVAKI LED
Model: STV-24LEDG9
Chassis / Version: TP.S512.PA63
Panel: M240HTN01.2
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN51DP
MOSFET LED driver: PA1108DA
Power Supply (PSU): integrated into MainBoard
PWM Power: LD5530
MOSFET Power: TO-252
MainBoard: TP.S512.PA63
IC MainBoard: CPU: S2T512, SPI Flash: GD25Q64, Audio: YD1517P
Tuner: XF-3SDT-H (R840)
Technical Specifications STV-24LEDG9
SHIVAKI STV-24LEDG9
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SHIVAKI STV-24LEDG9 does not turn on, does not respond to buttons and remote control, indicators on the front panel do not light up and do not blink.
First of all, in such cases, you should verify the operability of the common switching power supply (IIP) - AC / DC voltage converter of the mains voltage. All source elements in this TV model are located on the MainBoard TP.S512.PA63 main board. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (TO-252) and the rectifier diodes of the converters for the probability of a short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. The LD5530 PWM controllers, in the absence of visible damage or open faults between the terminals, are checked by replacing them with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power (LED-driver).
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the TP.S512.PA63 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - CPU: S2T512, SPI Flash: GD25Q64, Audio: YD1517P with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner XF-3SDT-H (R840) may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, remind users! Attempts to independently repair the SHIVAKI STV-24LEDG9 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> SHIVAKI STV-24LEDG9, Main: TP.S512.PA63, Panel: M240HTN01.2
The appearance of MainBoard TP.S512.PA63 is shown in the figure below:TP.S512.PA63
TP.S512.PA63 can be used in TVs:
Aiwa 24le7021 .
Main features of the SHIVAKI STV-24LEDG9 device:
Installed matrix (LED-panel) M240HTN01.2.
To power the backlight LEDs, a converter is used, combined with the TP.S512.PA63 main board, controlled by the SN51DP PWM controller. As the power elements of the LED driver, keys of the type PA1108DA are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using LD5530 microcircuits and TO-252 type power switches.
MainBoard - the main board (motherboard) is a TP.S512.PA63 module, using CPU chips: S2T512, SPI Flash: GD25Q64, Audio: YD1517P and others.
Tuner XF-3SDT-H (R840) provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: M240HTN01.2
Type: a-Si TFT-LCD, Panel
Diagonal size: 24.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 531.36x298.89 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 3.5 / 1.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 9S4P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
TV SHIVAKI STV-24LEDG9 with LCD display M240HTN01.2, diagonal size 24 "(61 cm) 16: 9 format. The required brightness of the screen is 250 cd / m² LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 800: 1. The LED-panel of this TV has end-face LED backlighting - Edge LED. The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution according to the standard 1080p (Full HD). Input high frequency or video signal can be processed by analog systems, PAL, SECAM, NTSC Image processing and generation of the digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats:.. MP3, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by 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, HDMI, 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, 1280x1024, 1360x768, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T, DVB-C, DVB-T2 standards.
Overall dimensions: With a support of 581x409x160 mm, Without a support of 581x370x55 mm.
TV Weight: 5.9 kg.
Attention! The M240HTN01.2 panel of the SHIVAKI STV-24LEDG9 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.
