Technical description and composition of the TV AKAI LTA-19S01P, type of panel and applicable modules. The composition of the modules.AKAI
Model: LTA-19S01P
Chassis / Version: T.VST26.7A
Panel: M185B1-L02
Inverter (backlight): 12V, 2 LAMP CCFL
Power Supply (PSU): Adapter 12V
MainBoard: T.VST26.7A 10093
IC MainBoard: TSUMV26KE-LF, 25X80AVSIG, YD1517P, MP1482DN, IS24C32A
Tuner: TDQ-ATF27WT-F
Technical Specifications LTA-19S01P
AKAI LTA-19S01P
General recommendations for repairing TV LCD
Possible malfunctions
- The AKAI LTA-19S01P TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In some of these cases, a malfunction is detected in the adapter power module.
The owner of the TV can purchase an external power supply unit such as Adapter and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, it is necessary to check the serviceability of power switches and rectifier diodes for possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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 the excess of maximum current or voltage values. 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), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
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, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- 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 T.VST26.7A 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, it is necessary to check its components TSUMV26KE-LF, 25X80AVSIG, YD1517P, MP1482DN, IS24C32A. 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 it is necessary to check the voltage of the tuner TDQ-ATF27WT-F and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention TV owners! Attempts to self-repair AKAI LTA-19S01P are not recommended by the manufacturer and can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> AKAI LTA-19S01P, Main: T.VST26.7A 10093, Panel: M185B1-L02
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> AKAI LTA-19S01P Chassis T.VST26.7A
LTA-16S01P, LEA-16S02P, LTA-19S01P, LEA-19S02P, LTA-22S01P, LTA-24S01P
The appearance of MainBoard T.VST26.7A is shown in the figure below:T.VST26.7A
T.VST26.7A can be used on TVs:
AKAI LEA-19S02P (Panel MT185GW01 V.1), Akai LTA-24S01P (Panel M236H1 L01 Rev.C1), AKAI LTA-22S01P (Panel CLAA216WA01), AKAI LTA-19S01P (Panel M185B1-L02), HYUNDAI H-LED22V1 (Panel CLAA215FA04), HYUNDAI H-LED19V3 (Panel MT185GW01 V.1), IZUMI TLE15H500M (Panel 15 inch).
Key Features of the AKAI LTA-19S01P:
Installed matrix (LCD-panel) M185B1-L02.
A 12V inverter is used to power the backlight.
To power all internal components of the AKAI LTA-19S01P TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a T.VST26.7A module, using TSUMV26KE-LF, 25X80AVSIG, YD1517P, MP1482DN, IS24C32A, and others microcircuits.
The TDQ-ATF27WT-F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: M185B1-L02
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
Brand: AKAI, Model: LTA-19S01P.
Short from TV: LCD, 19 ", 1366x768, 720p HD, sound: 5 watts.
The composition uses MainBoard T.VST26.7A 10093 and an LCD panel (matrix) M185B1-L02.
Power supply unit external Adapter 12V.
AKAI LTA-19S01P TV with an M185B1-L02 LCD display, 19 "(48 cm) diagonal size in 16: 9 format. 300 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Maximum brightness to minimum ratio (contrast) ) is 1000: 1. It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard for 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 standard max 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the speaker system of sound 5 W (2x2.5 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, audio x2, component, SCART, RGB, VGA, HDMI. 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.
The power consumed by the TV working in the network mode is 40 watts.
Overall dimensions: 470x360x155 mm.
Mass of the TV: 4.3 kg.
Attention! The AKAI LTA-19S01P LCD TV panel M185B1-L02 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!