Technical description and composition of the TV SHIVAKI STV-22LEDG7, type of panel and applicable modules. The composition of the modules.SHIVAKI LED
Model: STV-22LEDG7
Chassis / Version: MSD308PV7.0-A
Panel: CLAA215FA04 // LQ215M1LGN2
LED driver (backlight): SQD-605-VER3.2
PWM LED driver: SAQ8818
MOSFET LED driver: FQD19N10L
Power Supply (PSU): Adapter 12V
MainBoard: MSD308PV7.0-A
IC MainBoard: MSD309PX-LF-Z1, 25L3205D, R2A15120FA
Tuner: NoName
Technical Specifications STV-22LEDG7
SHIVAKI STV-22LEDG7
General repair guidelines for TV LCD LED
Possible malfunctions
- SHIVAKI STV-22LEDG7 does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
In such cases, the adapter power supply is usually faulty.
The external adapter 12V power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the motherboard MSD308PV7.0-A should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - MSD309PX-LF-Z1, 25L3205D, R2A15120FA. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the NoName tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
It should be remembered! Attempts to independently repair the SHIVAKI STV-22LEDG7 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> SHIVAKI STV-22LEDG7, Main: MSD308PV7.0-A, Panel: CLAA215FA04
The appearance of the MainBoard MSD308PV7.0-A is shown in the figure below:MSD308PV7.0-A
MSD308PV7.0-A can be used in TVs:
SHIVAKI STV-19LEDG7 (Panel LQ185T1LGN3), SHIVAKI STV-22LEDG7 (Panel CLAA215FA04).
Main features of the SHIVAKI STV-22LEDG7 device:
Installed matrix (LED panel) CLAA215FA04 or LQ215M1LGN2.
To power the backlight LEDs, the SQD-605-VER3.2 LED driver is used, controlled by the SAQ8818 PWM controller. As the power elements of the LED driver, keys of the type FQD19N10L are used.
To power all the internal components of the SHIVAKI STV-22LEDG7 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a module MSD308PV7.0-A, using microchips MSD309PX-LF-Z1, 25L3205D, R2A15120FA and others.
The NoName tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CPT
Model: CLAA215FA04 V4
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 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: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 16S4P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
TV SHIVAKI STV-22LEDG7 with LCD display CLAA215FA04, 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 is equipped with end LED backlighting - Edge LED.The design and technical capabilities of the TV include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic layout 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, JPEG.
The power of the acoustic system of sound 20 W (2x10 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, 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, 1280x1024, 1920x1080.
The power consumed by the TV in the operating mode from the network is 40 watts.
Overall dimensions: 536x380x180 mm.
TV Weight: 5.1 kg.
Attention! The panel CLAA215FA04 LED-TV SHIVAKI STV-22LEDG7 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.