Technical description and composition of the TV SHIVAKI STV-24LED5W, type of panel and applicable modules. The composition of the modules.SHIVAKI LED
Model: STV-24LED5W
Chassis / Version: TP.VST59.PA671
Panel: LM240WH1-LE1
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN510P
MOSFET LED driver: ME15M10-G
Power Supply (PSU): integrated into MainBoard
MainBoard: TP.VST59.PA671
IC MainBoard: CPU: TSUMV59XE-Z1, SPI: FLASH W25Q32BV
Tuner: R840
Technical Specifications STV-24LED5
SHIVAKI STV-24LED5W
General repair guidelines for TV LCD LED
Repair of the TV SHIVAKI STV-24LED5W should begin with the diagnosis of a malfunction, which involves a careful examination of the external and internal elements of the device. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
Sometimes the SHIVAKI STV-24LED5W TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no 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 dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but the sound is there and other functions work, there is a high probability of a malfunction of the LED driver (power converter for the backlight LEDs of the LM240H1-LE1 panel). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the rations of their terminals, as well as the reliability of the connections in the connectors and rations of the terminals.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes.
Repair of the TP.VST59.PA671 motherboard must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: TSUMV59XE-Z1, SPI: FLASH W25Q32BV which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Once again, remind users! Attempts to independently repair the SHIVAKI STV-24LED5W TV without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> SHIVAKI STV-24LED5W, Main: TP.VST59.PA671, Panel: LM240H1-LE1
The appearance of MainBoard TP.VST59.PA671 is shown in the figure below:TP.VST59.PA671
TP.VST59.PA671 can be used in TVs:
FUSION FLTV-22C10 (Panel M215HTN01.3), FUSION FLTV-24L32 (Panel M236HJJ-P02 Rev C4 HK236WLEDM-CHL4H), SHIVAKI STV-24LED5W (Panel LM240WH1-LE1).
Main features of the SHIVAKI STV-24LED5W device:
Installed matrix (LED-panel) LM240WH1-LE1.
To power the backlight LEDs, a converter is used, combined with the TP.VST59.PA671 main board, controlled by the SN510P PWM controller. As the power elements of the LED driver, keys of the type ME15M10-G are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit.
MainBoard - the main board (motherboard) is a TP.VST59.PA671 module, using CPU chips: TSUMV59XE-Z1, SPI: FLASH W25Q32BV and others.
The R840 tuner provides TV reception and channel tuning.