Akai LED
Model: LTA-24S01P
Chassis / Version: T.VST26.7A
Panel: M236H1 L01 Rev. C1
Power Supply (PSU): Adapter 12V, 5A
MainBoard: T.VST26.7A
IC MainBoard: SPI FLASH: 25X80AVSIG, Sound: 1517P
Tuner: TDQ-ATF27WT-F
Technical Specifications LTA-24S01P
AKAI LTA-24S01P
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular Akai LTA-24SO1P, it is advisable to start with a careful external examination of internal and external elements. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
In the absence of any signs of operability, when Akai LTA-24SO1P does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the adapter 12V, 5A power supply module of the TV. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but the sound is there and other functions work, there is a high probability of a malfunction of the LED driver (power converter for the backlight LEDs of the panel M236H1 L01 Rev. C1). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
In cases of attempts to repair the motherboard T.UST26.7A, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - SPI FLASH: 25X80AVSIG, Sound: 1517P. Defective components should be replaced.
Before replacing the TDQ-ATF27WT-F tuner, if there is no tuning for the channels, you must first check the supply voltage at its terminals, including the power supply of varicaps (30-33V).
Attention! Users and owners of LTA-24SO1P TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Repair MainBoard
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 ").
Key Features of the AKAI LTA-24S01P:
Installed matrix (LED-panel) M236H1 L01 Rev. C1.
To power all the internal components of the AKAI LTA-24S01P TV, an external adapter type 12V, 5A is used.
MainBoard - the main board (motherboard) is a T.VST26.7A module, using microchips SPI FLASH: 25X80AVSIG, Sound: 1517P and others.
The TDQ-ATF27WT-F tuner provides TV reception and tuning to and channels.
Additional technical information about the panel:
Brand: CMO
Model: M236H1-P08
Type: a-Si TFT-LCD, CELL
Diagonal size: 23.6 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 521.28x293.22 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 6.25% (with Polarizer)
Contrast Ratio: 1200: 1
Display Colors: 16.7M (6-bit + Hi-FRC)
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0 volt
Brand: AKAI, Model: LTA-24S01P.
Shortly from the TV: LCD, 1080p Full HD, diagonal 24 "(61 cm), there is HDMI.
The composition uses MainBoard T.VST26.7A and an LCD panel (matrix) M236H1 L01 Rev. C1.
Power supply unit external Adapter 12V, 5A.
AKAI LTA-24S01P TV with an M236H1 LCD display, diagonal size 24 "(61 cm) in 16: 9 format. The brightness of the screen is 250 cd / m² by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 1000: 1. The design and technical capabilities of the TV provide viewing of broadcasts and films in high quality HD with a resolution of 1920x1080 pixels in graphic decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic about Digital signal processing and generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
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 61 watts.
Overall dimensions: 589x439x155 mm.
TV Weight: 9.5 kg.
Attention! The M236H1 L01 Rev. C1 panel of the AKAI LTA-24S01P 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!
