Technical description and composition of the TV AKIRA LCT-32MT02ST, type of panel and applicable modules. The composition of the modules.AKIRA
Model: LCT-32MT02ST
Panel: V320B1-L01
T-CON: V315B1-C01; CM2681A-KQ, AS-15G, BA7T2R, AT1380AP
Inverter (backlight): VIT70002.00 REV5
PWM Inverter: OZ964SN
MainBoard: MAIN_PCB
IC MainBoard: MST9E88L-LF, 25X40V, 24C32
Tuner: JS-6H2-121
Technical Specifications LCT-32MT02ST
AKIRA LCT-32MT02ST
General recommendations for repairing TV LCD
Possible manifestations of defects
- AKIRA LCT-32MT02ST does not turn on at all and does not show any signs of operability. Does not blink indicators and does not respond to control buttons.
Failure in such cases should be sought in the power supply circuits. It is necessary to measure the secondary output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
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 mains fuse usually breaks.
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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the MAIN_PCB 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MST9E88L-LF, 25X40V, 24C32. BGA chip malfunctions are usually easy to detect by warming up.
The malfunction of the tuner JS-6H2-121 is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
TV users and owners need to remember that attempts to self-repair an AKIRA LCT-32MT02ST TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Key Features of the AKIRA LCT-32MT02ST:
Installed matrix (LCD panel) V320B1-L01.
The matrix control uses the Timing Controller (T-CON) V315B1-C01 ;.
The VIT70002.00 inverter is used to power the backlight lamps, it is controlled by the OZ964SN PWM controller.
The required supply voltage for all nodes of the TV AKIRA LCT-32MT02ST provides a switching power supply.
MainBoard - the main board (motherboard) is a MAIN_PCB module, using microchips MST9E88L-LF, 25X40V, 24C32 and others.
The tuner JS-6H2-121 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V320B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 32.0 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 708.954x398.592 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
Brand: AKIRA, Model: LCT-32MT02ST.
Briefly from the TV: LCD, 32 ", 1366x768, 720p HD, sound: 16W, HDMI: 2.
The composition uses MainBoard MAIN_PCB and LCD panel (matrix) V320B1-L01.
AKIRA LCT-32MT02ST TV with V320B1-L01 LCD, 32 "(81 cm) diagonal size in 16: 9 format. 650 cd / m² screen brightness is provided by CCFL (EEFL) lamps. Contrast - the ratio of maximum brightness to minimum is not less than 1200: 1. It is possible to view in high quality HD at a resolution of 1366x768 pixels in 720p standard (HD Ready). The input high-frequency or video signal is decoded in PAL, SECAM, NTSC analog systems. Digital signal generation (graphic format) is performed in 480i, 480p standards , 576i, 576p, 720p, 1080i.
The power of the speaker system is 16 watts (2x8 watts). 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, audio x3, S-Video, component, SCART, RGB, VGA, HDMI x2. A standard VGA (D-Sub 15) connector is used to connect a laptop or computer. This interface supports resolutions: 640x480, 800x600, 1024x768.
Overall dimensions: With stand 731x468x166 mm, Without stand 731x437x87 mm.
Attention! The V320B1-L01 panel of the AKIRA LCT-32MT02ST 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!