Technical description and composition of the TV SHIVAKI STV-16LED1, type of panel and applicable modules. The composition of the modules.SHIVAKI LED
Model: STV-16LED1
Chassis / Version: PA-0346-2
Panel: B156XW02 V3
LED driver (backlight): EDGE LED Driver
Power Supply (PSU): Adapter 12V
MainBoard: PA-0346-2-21ZG V1.2
IC MainBoard: SPI Flash: 25Q32, SOUND: CD1517CP
Tuner: ET-6TK2E-EF108WL3
Technical Specifications STV-16LED1
SHIVAKI STV-16LED1
General repair guidelines for TV LCD LED
Possible malfunctions
- SHIVAKI STV-16LED1 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In such cases, the fault should be sought first in the Adapter power module.
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 supply voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the main fuse usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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 you need to open the panel and check separately each LED 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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the PA-0346-2-21ZG 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). When repairing an MB board, you need to check its components SPI Flash: 25Q32, SOUND: CD1517CP. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner ET-6TK2E-EF108WL3 and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
It should be remembered! Attempts to independently repair the SHIVAKI STV-16LED1 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-serviceability of the device!
FIRMWARE FOR SPI FLASH -----------> SHIVAKI STV-16LED1, Main: PA-0346-2--21ZG V1.2, Panel: B156XW02 V3
The appearance of MainBoard PA-0346-2-21ZG is shown in the figure below:PA-0346-2-21ZG
Main features of the SHIVAKI STV-16LED1 device:
Installed matrix (LED-panel) B156XW02 V3.
The LED driver EDGE is used to power the backlight LEDs.
To power all internal nodes of the SHIVAKI STV-16LED1 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a PA-0346-2-21ZG module using SPI Flash chips: 25Q32, SOUND: CD1517CP and others.
The ET-6TK2E-EF108WL3 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: B156XW02 V3 2 Compatible model
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 344.232x193.536 mm
Shape Style: Wedge (PCBA Bent, Depth? 5.2mm)
Surface: Antiglare, Hard coating (3H)
Brightness: 200 cd / m²
Contrast Ratio: 400: 1
Display Colors: 262K (6-bit), CIE1931 60%
Response Time: 6/2 (Tr / Td)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 6-bit), 40 pins
Voltage: 3.3V
Technical description
TV SHIVAKI STV-16LED1 with LCD B156XW02, diagonal size 16 "(41 cm) 16: 9 format. The required brightness of the screen 200 cd / m² is provided by LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 500: 1. Edge LED backlighting is realized in the LED-panel of this TV - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p. Supported media file formats: MP3, MPEG4, 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), component, SCART, RGB, VGA, HDMI, USB. 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.
Overall dimensions: With a support of 581x406x180 mm, Without a support of 581x371x43 mm.
Attention! The panel B156XW02 V3 of the SHIVAKI STV-16LED1 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.
