Technical description and composition of the AKAI LEA-19A08G TV, panel type and applicable modules. The composition of the modules.AKAI LED
Model: LEA-19A08G
Chassis / Version: AS-MST6M181VS-LE1
Panel: LM185WH2-TLA1
LED driver (backlight): integrated into PSU 56V, 65mA
PWM LED driver: BIT3251
Power Supply (PSU): MP113W (MP113-L18)
PWM Power: PWM SOT23-6 LD7531
MainBoard: AS-MST6M181VS-LE1
IC MainBoard: MST6E181VS, M13S2561616A, Q32B0104HIP, YD1517P (18pin), FR9888 = MP1484EN
Tuner: ET-6N1E-CF101R
Technical Specifications LEA-19A08G
AKAI LEA-19A08G
General repair guidelines for TV LCD LED
Possible malfunctions
- The AKAI LEA-19A08G TV does not turn on, does not respond to the remote control and buttons on the control panel, the indicators do not light or flash.
In the vast majority of such cases, a malfunction is detected in the MP113W power module. It is necessary to measure the secondary output voltages, and if they are absent, check the operability of the power switches of the converters and rectifier diodes for a short circuit probability.
In case of breakdowns in the secondary circuits, the converter can emergencyly operate in the short circuit mode, and during short circuit in the power 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 the excess of maximum current or voltage values. 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 SW23-6 LD7531 PWM. It is checked only by replacement with a known good one.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
As a rule, in such cases there is no display backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. 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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the AS-MST6M181VS-LE1 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, you need to check its components MST6E181VS, M13S2561616A, Q32B0104HIP, YD1517P (18pin), FR9888 = MP1484EN. 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 you need to check the voltage of the tuner ET-6N1E-CF101R and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention! For users and owners of LEA-19A08G TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
FIRMWARE FOR SPI FLASH -----------> AKAI LEA-19A08G, Main: AS-MST6M181VS-LE1, Panel: LM185WH2-TLA1 AKAI LEA-19A08G, Main: AS-MST6M181VS-LE1, Panel: LM185WH2-TLA1
The appearance of MainBoard AS-MST6M181VS-LE1 is shown in the figure below:AS-MST6M181VS-LE1
AS-MST6M181VS-LE1 can be used in TVs:
AKAI LTA-15A15M (Panel LTA150XH-L06), AKAI LEA-22A08G (Panel LM215WF4 (TL)(E7)), AKAI LEA-19A08G (Panel LM185WH2-TLA1).
The appearance of the power supply
Key Features of the AKAI LEA-19A08G:
Installed matrix (LED panel) LM185WH2-TLA1.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a BIT3251 PWM controller.
The necessary supply voltages for all nodes of the TV AKAI LEA-19A08G are generated by the MP113W power module or its analogs using PWM SOT23-6 LD7531 microcircuits.
MainBoard - the main board (motherboard) is an AS-MST6M181VS-LE1 module, using chips MST6E181VS, M13S2561616A, Q32B0104HIP, YD1517P (18pin), FR9888 = MP1484EN and others.
The ET-6N1E-CF101R tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LM185WH2-TLA1
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, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 1.1 / 3.9 (Tr / Td)
Frequency: 60Hz
Lamp Type: 3 strings WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
Brand: AKAI, Model: LEA-19A08G.
Shortly from the TV: LCD, 720p HD, diagonal 19 "(48 cm), there is HDMI, there is USB, backlight type: Edge LED.
The composition uses MainBoard AS-MST6M181VS-LE1 and the LCD panel (matrix) LM185WH2-TLA1.
Power Supply Unit (PSU) MP113W (MP113-L18) Power Supply.
AKAI LEA-19A08G TV with LM185WH2-TLA1 LCD display, 19 "(48 cm) diagonal size of 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1000 : 1. This model uses Edge LED lateral LED illumination. You can 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 Digital signal processing and generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
The power of the sound system 6 W (2x3 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV x2, audio x3, component, VGA, HDMI, USB. 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 30 watts.
Overall dimensions: With stand 460x350x160 mm, Without stand 460x295x45 mm.
TV Weight: 3.6 kg.
Attention! The panel of the LM185WH2-TLA1 LED TV AKAI LEA-19A08G 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.