Technical description and composition of the AKAI LEA-22V21M TV, type of panel and applicable modules. The composition of the modules.Akai LED
Model: LEA-22V21M
Chassis / Version: T.VST59.62
Panel: A215ED1DA3-1
LED driver (backlight): HQ-LED60-1R5
Power Supply (PSU): Adapter 12V
MainBoard: T.VST59.62
IC MainBoard: CPU: TSUMV59XU-Z1, SPI FLASH: GD25Q322, TDA-1517P, TPS54329 (PWM Step-down), BL8024 (PWM Step-down marker GG ..)
Tuner: CDT-3NP5I1-10
Appearance
AKAI LEA-22V21M
General repair guidelines for TV LCD LED
TV Akai LEA-22V21M, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal 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. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
Sometimes Akai LEA-22V21M TV just does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If the Akai LEA-22V21M does not have an image, but there is sound, the backlight LEDs on the A215ED1DA3-1 panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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.
On the motherboard T.VST59.62, in the event of a malfunction, you should first check the performance of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: TSUMV59XU-Z1, SPI FLASH: GD25Q32 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the tuner CDT-3NP5I1-10, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner.
Attention to the owners! Attempts at self-repair of the Akai LEA-22V21M TV are not recommended by the manufacturer and can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> Akai LEA-22V21M, Main: T.VST59.62, Panel: A215ED1DA3-1
The appearance of MainBoard T.VST59.62 is shown in the figure below:T.VST59.62
It is advisable to start the repair of the T.VST59.62 motherboard based on the TSUMV59Xxx multifunction processor by checking the operability of linear voltage stabilizers or voltage converters necessary to provide power to the processor nodes - 1.2V core power, 1.8V DDR memory and Stand-by 3.3V mode . If there is no image, but if the display backlight is working properly, you should check the voltage of the LCD panel 5V or 12V, depending on the type of panel used.
T.VST59.62 can be used on TVs:
Akai LEA-22V21M (Panel A215ED1DA3-1), ERISSON 22LEN18 (Panel M215HGJ-L21), ERISSON 16LEN18 (Panel N156BGE-L11 Rev.C1), ERISSON 24LEN18 (Panel M236HGE-L20), Fusion FLTV-16L10B (Panel T156LL10-AW4), FUSION FLTV-24T9 (Panel M240HW01 V.B), FUSION FLTV-16T9 (Panel B156XTN02), FUSION FLTV-16T9D (Panel T156LL10-AW4), HYUNDAI H-LED19V13 (Panel CX185LEDM ), SUPRA STV-LC19811FL (Panel M185XTN01.3), SUPRA STV-LC19820WL (Panel LM185WH2), SUPRA STV-LC22820FL (Panel LS215AFTNM), SUPRA STV-LC18250WL (Panel B173HW02 V.1), SUPRA STV-LC22810FL (Panel M215HGE-L21 Rev.C1), SUPRA STV-LC16810WL (Panel B156RW01 V.1), SUPRA STV-LC18251FL (Panel N173HGE-L11 Rev. C1), SUPRA STV-LC22811FL (Panel 1080p Full HD 1920x1080), SUPRA STV-LC1982WL (Panel 1080p Full HD 1920x1080), TELEFUNKEN TF-LED22S3 (Panel M215HGE-P02).
The appearance of the power supply
Key features of the AKAI LEA-22V21M device:
Installed matrix (LED-panel) A215ED1DA3-1.
The LED driver HQ-LED60-1R5 is used to power the backlight LEDs.
To power all internal components of the AKAI LEA-22V21M TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a T.VST59.62 module using CPU chips: TSUMV59XU-Z1, SPI FLASH: GD25Q322, TDA-1517P, TPS54329 (PWM Step-down), BL8024 (PWM Step-down marker GG ..) and others.
The tuner CDT-3NP5I1-10 provides the reception of television programs and tuning to channels.
