Technical description and composition of the TV AKAI LEA-24C05P, type of panel and applicable modules. The composition of the modules.Akai LED
Model: LEA-24C05P
Chassis / Version: JUG7.820.699-1
Panel: V236H1-LE2 Rev. C1
LED driver (backlight): with integrated MainBoard
PWM LED driver: A8504
Power Supply (PSU): PW0500205
PWM Power: LD7575B (PWM flyback)
MOSFET Power: SVD4N65F
MainBoard: JUG7.820.699-1 LS07 2010.03.09
IC MainBoard: CPU: TSUMV26KU-LF, Spi Flash: 25F40-100GCP, Eeprom: 24LC32B
Tuner: CDT-3LC4I1-00
Technical Specifications LEA-24C05P
AKAI LEA-24C05P
General repair guidelines for TV LCD LED
TV Akai LEA-24C05P, 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. Experienced repairmen are often aware of the causes of the defect and possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
If the power supply module malfunctions, the external manifestations may be different, for example, Akai LEA-24C05P does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
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 Akai LEA-24C05P has no image, there is sound and channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the V236H1-LE2 Rev.C1 panel, or their power converter - LED driver. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
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.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
When repairing an MB board, you need to check its components Cpu: TSUMV26KU-LF, Spi Flash: 25F40-100GCP, Eeprom: 24LC32B. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
If you suspect a malfunction of the tuner CDT-3LC4I1-00, first of all, you need to make sure that there is a supply voltage on the corresponding output of the tuner.
It should be remembered! Attempts to repair the Akai LEA-24C05P 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 -----------> Akai LEA-24C05P, Main: JUG7.820.699-1 LS07 2010.03.09, Panel: V236H1-LE2 Rev.C1
The appearance of the MainBoard JUG7.820.699-1 is shown in the figure below:JUG7.820.699-1
JUG7.820.699-1 can be used on TVs:
AKAI LEA-19C05P (Panel CLAA185WA04), AKAI LEA-22C05P (Panel CLAA 215FA04S), Akai LEA-24C05P (Panel V236H1-LE2 Rev.C1).
The appearance of the power supply
Key Features of the AKAI LEA-24C05P:
Installed matrix (LED panel) V236H1-LE2 Rev. C1.
To power the backlight LEDs, a converter is used, combined with the main board JUG7.820.699-1, controlled by the A8504 PWM controller.
The necessary supply voltages for all nodes of the AKAI LEA-24C05P TV are generated by the PW0500205 power module or its analogs using LD7575B (PWM flyback) microcircuits and power switches of the SVD4N65F type.
MainBoard - the main board (motherboard) is a JUG7.820.699-1 module, using Cpu microcircuits: TSUMV26KU-LF, Spi Flash: 25F40-100GCP, Eeprom: 24LC32B and others.
The tuner CDT-3LC4I1-00 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V236H1-LE2
Type: a-Si TFT-LCD, Panel
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)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12S8P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
Brand: AKAI, Model: LEA-24C05P.
Short from TV: LCD, LED backlight, 24 ", 1920x1080, 1080p Full HD, sound: 4 watts.
The composition uses MainBoard JUG7.820.699-1 LS07 2010.03.09 and LCD panel (matrix) V236H1-LE2 Rev. C1.
Power Supply Unit (PSU) PW0500205 Power Supply.
AKAI LEA-24C05P TV with V236H1-LE2 LCD, 24 "(55 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. 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 sound system 4 W (2x2 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 x3, component, 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: With stand 772x546x200 mm, Without stand 772x486x46 mm.
Attention! The V236H1-LE2 Rev.C1 panel of the AKAI LEA-24C05P LED TV 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.