SHIVAKI LED
Model: STV-32LED6
Chassis / Version: TP.VST59S.PB813
Panel: HV320WX2-206
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN510P
Power Supply (PSU): integrated into MainBoard
PWM Power: LD7536 (6 pin)
MainBoard: TP.VST59S.PB813
IC MainBoard: CPU: TSUMV59XUS A7MKE87C, FLASH: 25Q32
Tuner: RAFAEL Micro R840
Technical Specifications STV-32LED6
SHIVAKI STV-32LED6
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SHIVAKI STV-32LED6 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In this case, first of all, it is necessary to check the operability of the main power source - the AC / DC network voltage converter, all of whose elements are located on the MainBoard TP.VST59S.PB813 board. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) LD7536 (6 pin), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. 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 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. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the TP.VST59S.PB813 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 CPU components: TSUMV59XUS A7MKE87C, FLASH: 25Q32. 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.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the RAFAEL Micro R840 tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention TV owners! Attempts at self-repair of SHIVAKI STV-32LED6 are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Service manual and sсhematic diagram TP.VST59S.PB813
FIRMWARE FOR SPI FLASH -----------> SHIVAKI STV-32LED6, Main: , Panel: HV320WX2-206
The appearance of MainBoard TP.VST59S.PB813 is shown in the figure below:TP.VST59S.PB813
The TP.VST59S.PB813 motherboard is combined with a power module and is an independent device made on the basis of the TSUMV59Xxx multifunction processor. Repair of such a board must begin by checking the power batteries, as well as the operability of voltage converters and linear stabilizers, necessary to provide power to certain processor nodes, in particular: + 1.2V core power, built-in DDR + 1.8V memory and Stand- by 3.3V. The power supply voltage of the LCD panel is 5V or 12V, depending on the type of panel used, it is necessary to check directly on the LVDS connector.
TP.VST59S.PB813 can be used in TVs:
MYSTERY MTV-3217LW (Panel CX315DLEDM), SHIVAKI STV-32LED6 (Panel HV320WX2-206), SUPRA STV-LC28500WL (Panel ST2751A01-3), TELEFUNKEN TF-LED32S2 (Panel LSC320AN02), TELEFUNKEN TF-LED39S11 (Panel T390HVN04.2 E39-9100).
Main features of the SHIVAKI STV-32LED6 device:
Installed matrix (LED-panel) HV320WX2-206.
To power the backlight LEDs, a converter is used, combined with the TP.VST59S.PB813 main board, controlled by the SN510P PWM controller.
The power module is combined with the MainBoard and is made according to the scheme of a flyback AC / DC voltage converter using LD7536 chips (6 pin).
MainBoard - the main board (motherboard) is a module TP.VST59S.PB813, using CPU chips: TSUMV59XUS A7MKE87C, FLASH: 25Q32 and others.
The RAFAEL Micro R840 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: BOE
Model: HV320WX2-206
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AFFS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.6% (with Polarizer)
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TV SHIVAKI STV-32LED6 with LCD HV320WX2-206, diagonal size 32 "(81 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 2500: 1. Edge LED backlighting is implemented 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 . Emah PAL, SECAM, NTSC Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, WMA, MPEG4, Xvid, MKV, JPEG.
The power of the sound system 16 W (2x8 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, 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.
Overall dimensions: With stand 740x490x200 mm, Without stand 740x450x80 mm.
Attention! The HV320WX2-206 panel of the SHIVAKI STV-32LED6 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.
