Technical description and composition of the TV SHIVAKI STV-22LEDVDG9, type of panel and applicable modules. The composition of the modules.SHIVAKI LED
Model: STV-22LEDVDG9
Chassis / Version: T.MSD309.B65T
Panel: V236H1-LE4 Rev C1
T-CON: V236H1-LE4
LED driver (backlight): integrated into PSU
Power Supply (PSU): P.AE11.03 B12465
MainBoard: T.MSD309.B65T
IC MainBoard: CPU: MSD309B, FLASH: WINBOND 25Q32FV
Tuner: NoName
Technical Specifications STV-22LEDVDG9
SHIVAKI STV-22LEDVDG9
General repair guidelines for TV LCD LED
SHIVAKI STV-22LEDVDG9, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. Visible damage to elements can sometimes indicate the direction of the search for a defect even before the necessary measurements are taken. 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-22LEDVDG9 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). When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If the SHIVAKI STV-22LEDVDG9 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the V236H1-LE4 Rev C1 panel, or their power converter - LED driver. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source.
In cases of attempts to repair the motherboard T.MSD309.B65T, 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.
When repairing an MB board, you need to check its CPU components: MSD309B, FLASH: WINBOND 25Q32FV. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
Attention! For users and owners of STV-22LEDVDG9 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Repair MainBoardMainBoard T.MSD309.B65T uses the MSD309B processor, DDRAM random access memory (RAM) in BGA version and SPI Flash ROM of type 25Q32 (4Mb).
It is advisable to start the repair of the motherboard by checking the voltage converters and linear stabilizers necessary to provide power to the nodes in operating and standby mode. The processor core is powered by + 1.5V. Also, the processor voltage requires + 2.5V and + 3.3V.
If the display backlight is working properly and there is no image, it is necessary to check the panel power (depending on the type, + 5V or + 12V), which is more convenient to measure directly on the LVDS connector. If, in the presence of all the supply voltages, the TV does not enter the operating mode, does not respond to the Remote Control and control buttons, you should update the SPI Flash firmware.
The appearance of MainBoard T.MSD309.B65T is shown in the figure below:
The appearance of the power supply
Main features of the SHIVAKI STV-22LEDVDG9 device:
Installed matrix (LED panel) V236H1-LE4 Rev C1.
I Timing Controller (T-CON) V236H1-LE4.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SHIVAKI STV-22LEDVDG9 TV is carried out by the P.AE11.03 power module, or its analogs.
MainBoard - the main board (motherboard) is a module T.MSD309.B65T, using CPU chips: MSD309B, FLASH: WINBOND 25Q32FV and others.
The NoName tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V236H1-LE4
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 521.28x293.22 mm
Surface: Antiglare (Haze 25%)
Brightness: 280 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 9S8P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
TV SHIVAKI STV-22LEDVDG9 with LCD V236H1-LE4, diagonal size 22 "(56 cm) 16: 9 format. The required brightness of the screen 250 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 illumination - Edge LED.The TV’s design and technical features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). frequency or video signal can be processed in analogue 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 , VideoCD, SVCD, JPEG.
The power of the acoustic system of sound 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, component, SCART, RGB, VGA, HDMI x2, 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, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV in the operating mode from the network is 36 watts.
Overall dimensions: With stand 531x380x160 mm, Without stand 531x345x45 mm.
Attention! The panel V236H1-LE4 Rev C1 of the SHIVAKI STV-22LEDVDG9 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.
