Technical description and composition of the TV SHIVAKI LC-32A50, type of panel and applicable modules. The composition of the modules.SHIVAKI
Model: LC-32A50
Chassis / Version: T.MT8222.1B
Panel: T315HW02
MainBoard: T.MT8222.1B
IC MainBoard: MT8222ARMU TDA9886TS R2A15112FP-A
Tuner: TDQ-6F6 / T126CW
Technical Specifications LC-32A50
SHIVAKI LC-32A50
General recommendations for repairing TV LCD
Repair of the SHIVAKI LC-32A50 TV is better to start with a thorough external inspection and diagnosis of the malfunction. It is advisable to carefully examine the internal and external components. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
Malfunctions of the power module can be expressed in different ways, for example, the SHIVAKI LC-32A50 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
In most cases, a breakdown of the N-Fet converter key does 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.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
Sometimes the SHIVAKI LC-32A50 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the inverter itself, including the power supply unit (power supply unit).
Repairing the inverter is difficult because in case of any malfunction or emergency, even with uneven wear of the lamps, a protection is triggered, which turns it off for fire safety. Diagnostics become impossible and protection needs to be disabled.
It should be remembered that when the protection is turned off, there is always a risk of failure of the power elements of the inverter during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
Diagnostics and repair of the motherboard T.MT8222.1B is carried out by checking the performance of power stabilizers or updating the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MT8222ARMU TDA9886TS R2A15112FP-A, tuner TDQ-6F6 / T126CW and replace failed chips with new ones.
Attention to the owners! Attempts at self-repair of the SHIVAKI LC-32A50 TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Main MT8222_P1V1 (DDR1) VERSION V1.0
The appearance of MainBoard T.MT8222.1B is shown in the figure below:T.MT8222.1B
T.MT8222.1B can be used on TVs:
SHIVAKI LC-32A50 (Panel T315HW02), SUPRA STV-LC2615FD (Panel M260J3-L01 Rev:C1).
Main features of the SHIVAKI LC-32A50 device:
Installed matrix (LCD-panel) T315HW02.
The required supply voltage for all nodes of the SHIVAKI LC-32A50 TV provides a switching power supply.
MainBoard - the main board (motherboard) is a T.MT8222.1B module, using MT8222ARMU TDA9886TS R2A15112FP-A chips and others.
The TDQ-6F6 / T126CW tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T315HW02 V0 CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 4.0% (with Polarizer)
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
TV SHIVAKI LC-32A50 with LCD T315HW02, diagonal size 32 "(81 cm) 16: 9 format. The brightness of the screen 500 cd / m² is provided with fluorescent lights CCFL (EEFL). Dynamic contrast ratio 2500: 1 is provided with special control of work The design and technical capabilities of the TV provide for watching broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in a graphic decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal may 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. Stereo sound is realized by two built-in 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), SCART, RGB, HDMI x3. 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.
Overall dimensions: With a support of 581x406x180 mm, Without a support of 581x371x43 mm.
Attention! The T315HW02 panel of the SHIVAKI LC-32A50 LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
