Technical description and composition of the AKAI LEA-22S02 TV, panel type and applicable modules. The composition of the modules.AKAI LED
Model: LEA-22S02
Chassis / Version: T.VST26.7A
Panel: M215H3-LA1 Rev. C1
LED driver (backlight): SQD-605
PWM LED driver: SAQ8818
MOSFET LED driver: FQD19N10
Power Supply (PSU): Adapter 12V
MainBoard: T.VST26.7A 10093
IC MainBoard: CPU: TSUMV26KE-LF, SPI FLASH: 25Q80BVSIG, AUDIO: YD1517P
Tuner: TDQ-ATF27WT-F
Technical Specifications LEA-22S02P
AKAI LEA-22S02
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The AKAI LEA-22S02 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Most likely in this case, the main switching power supply (IPS) Adapter is faulty.
The external adapter 12V power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is then necessary to measure its output voltages and, if they are absent, it is necessary to check the power switches and rectifier diodes of the converters for a short-circuit probability.
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 mains fuse and, less often, the current sensor at the source of the key are most often cut off.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- 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.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the 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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: TSUMV26KE-LF, SPI FLASH: 25Q80BVSIG, AUDIO: YD1517P. BGA chip malfunctions are usually easy to detect by warming up.
If the TV works normally from external devices, but does not tune into television channels, the TDQ-ATF27WT-F tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
It should be remembered! Attempts to independently repair the AKAI LEA-22S02 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> EEPROM AKAI LEA-22S02, Main: T.VST26.7A 10093, Panel: M215H3-LA1 Rev.C1
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 LEA-22S02:
Installed matrix (LED panel) M215H3-LA1 Rev. C1.
To power the backlight LEDs, the SQD-605 LED driver is used, controlled by the SAQ8818 PWM controller. As the power elements of the LED driver, keys of the FQD19N10 type are used.
To power all internal components of the AKAI LEA-22S02 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a T.VST26.7A module, using CPU chips: TSUMV26KE-LF, SPI FLASH: 25Q80BVSIG, AUDIO: YD1517P and others.
The TDQ-ATF27WT-F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: M215H3-LA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 13S6P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
Brand: AKAI, Model: LEA-22S02P.
Shortly from the TV: LCD, LED backlight, 22 ", 1920x1080, 1080p Full HD, sound: 5 watts.
The composition uses MainBoard T.VST26.7A 10093 and LCD-panel M215H3-LA1 Rev. C1.
Power supply unit external Adapter 12V.
AKAI LEA-22S02P TV with an M215H3-LA1 LCD display, diagonal size 22 "(55 cm) in 16: 9 format. The required brightness of the screen is 250 cd / m² with LED backlight LED. The ratio of maximum brightness to minimum (contrast) is 1000 : 1. The LED display technology is implemented in the model’s display manufacturing technology.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 graphic resolution according to the standard 1080p (Full HD). video signal can be processed in the analog PAL, SECAM system, NTSC. Graphic processing and formation takes place in the digital signal 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, component, SCART, 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: 534x410x155 mm.
TV Weight: 4.5 kg.
Attention! The panel of the M215H3-LA1 Rev. C1 LED-TV AKAI LEA-22S02P 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.