Technical description and composition of the TV SHIVAKI STV-24LED5, type of panel and applicable modules. The composition of the modules.SHIVAKI LED
Model: STV-24LED5
Chassis / Version: T.VST29.A3B
Panel: LM236WH1
MainBoard: T.VST29.A3B
IC MainBoard: CPU: TSUMV59XU-Z1 Spi Flash: W25Q32
Tuner: T.VST29.A3B
Technical Specifications STV-24LED5
SHIVAKI STV-24LED5
General repair guidelines for TV LCD LED
It is advisable to start the repair of the SHIVAKI STV-24LED5 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. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In the case when the STV-24LED5 does not turn on, does not respond to the remote control and buttons on the front panel, does not blink lights and does not show any signs of operability, the power supply module is probably defective in this case. If it is serviceable with such manifestations, it is necessary to check the stabilizer (converter) of the processor power supply on the motherboard. In general, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
In cases where the SHIVAKI STV-24LED5 TV has lost an image, and the sound is there and all the other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the LM236H1 panel). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
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.
Diagnostics and repair of the T.VST29.A3B motherboard is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required.
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 the use of BGA soldering technologies can be diagnosed by warming up.
Before changing the tuner T.VST29.A3B, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner.
Once again, remind users! Attempts to independently repair the SHIVAKI STV-24LED5 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> SHIVAKI STV-24LED5, Main: T.VST29.A3B, Panel: LM236H1
The appearance of MainBoard T.VST29.A3B is shown in the figure below:T.VST29.A3B
It is advisable to start the repair of the T.VST29.A3B motherboard made on the basis of the TSUMV29Xxx multifunction processor by checking the operability of linear voltage stabilizers or voltage converters necessary to provide power to the processor nodes - 1.2V core power and Stand-by 3.3V mode. If there is no image, but the display backlight is working properly, you should check the power supply voltage of the LCD panel 5V or 12V, depending on the type of panel used.
T.VST29.A3B can be used on TVs:
IZUMI TLE15H311B (Panel LP154WE3-TLB1), IZUMI TLE19H103B (Panel V185B1-PE1 ), IZUMI TLE19H310B (Panel V185B1-PE1), SHIVAKI STV-24LED5 (Panel LM236WH1).
Main features of the SHIVAKI STV-24LED5 device:
The matrix (LED panel) LM236WH1 is installed.
The required supply voltage for all nodes of the TV SHIVAKI STV-24LED5 provides a switching power supply.
MainBoard - the main board (motherboard) is a T.VST29.A3B module, using CPU chips: TSUMV59XU-Z1 Spi Flash: W25Q32 and others.
The tuner T.VST29.A3B provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LM236WH1-SLA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 521.47x293.18 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 73%
Response Time: 7 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TV SHIVAKI STV-24LED5 with LCD LM240WH1-LE1, diagonal size 24 "(61 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 1000: 1. The LED-panel of this TV has end-face LED backlighting - Edge LED.The TV design and technical features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution according to the standard 1080p (Full HD). frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV , JPEG.
The power of the sound system 6 W (2x3 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, audio x2, component, SCART, RGB, 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.
Overall dimensions: With stand 574x400x150 mm, Without stand 574x359x42 mm.
Attention! The LM240WH1-LE1 panel of the SHIVAKI STV-24LED5 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.
