Technical description and composition of the AKAI LEA-19C11P TV, panel type and applicable modules. The composition of the modules.AKAI LED
Model: LEA-19C11P
Chassis / Version: LS09
Panel: ECG185O1-L03 (ECG18501-L03)
LED driver (backlight): integrated into PSU
Power Supply (PSU): Power_Supply
MainBoard: JUG7.820.1151
IC MainBoard: MST6E181VS-LF-Z1, M13S2561616A-5T, CFeon Q32A-100HIP, YD1517P
Tuner: CDT-3BP4I1-36
Appearance
AKAI LEA-19C11P
General repair guidelines for TV LCD LED
Possible malfunctions
- The AKAI LEA-19C11P TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
Most likely in this case, the main switching power supply (UPS) Power_Supply is faulty. It is necessary to measure the output voltages in the secondary circuits, and if they are absent, check the operability of the power switches of the converters and rectifier diodes for a possible breakdown (short circuit).
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 (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, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
In most cases, the malfunction is caused by the lack of a backlight display. 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.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- 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 JUG7.820.1151 motherboard should be started by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements MST6E181VS-LF-Z1, M13S2561616A-5T, cFeon Q32A-100HIP, YD1517P requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
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 power supply of the tuner CDT-3BP4I1-36 and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
TV users and owners must remember that attempts to self-repair an AKAI LEA-19C11P TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> AKAI LEA-19C11P LS09, Main: JUG7.820.1151, Panel: ECG185O1-L03 (ECG18501-L03)
The appearance of the MainBoard JUG7.820.1151 is shown in the figure below:JUG7.820.1151
Key Features of the AKAI LEA-19C11P:
Installed matrix (LED panel) ECG185O1-L03 (ECG18501-L03).
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the AKAI LEA-19C11P TV is carried out by the Power_Supply power supply module, or its analogues.
MainBoard - the main board (motherboard) is a JUG7.820.1151 module, using microchips MST6E181VS-LF-Z1, M13S2561616A-5T, cFeon Q32A-100HIP, YD1517P and others.
The tuner CDT-3BP4I1-36 provides the reception of television programs and tuning to channels.