Technical description and composition of the AKAI LTA-22N686HCP TV, panel type and applicable modules. The composition of the modules.AKAI
Model: LTA-22N686HCP
Chassis / Version: LS03
Panel: M220Z1 -L03 Rev. C1
T-CON: M22Z01-L03-X + C
Inverter (backlight): integrated into PSU
Power Supply (PSU): MLT-019L-C
MainBoard: JUG7.820.510-3
IC MainBoard: Cpu: MST718BE-LF, Spi Flash: W25X40AL, Eeprom: 24LC32, Audio: TDA1517P
Tuner: TAF6-F2121VH
Technical Specifications LTA-22N686HCP
AKAI LTA-22N686HCP
General recommendations for repairing TV LCD
Possible manifestations of defects
- The AKAI LTA-22N686HCP TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
With such manifestations, in some cases, the MLT-019L-C power module is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for possible short-circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
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 (OOS) stabilization circuits. 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, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- 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 JUG7.820.510-3 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements Cpu: MST718BE-LF, Spi Flash: W25X40AL, Eeprom: 24LC32, Audio: TDA1517P requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
The malfunction of the TAF6-F2121VH tuner is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Once again, remind users! Attempts to independently repair the AKAI LTA-22N686HCP TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> AKAI LTA-22N686HCP LS03, Main: JUG7.820.510-3, Panel: M220Z1 -L03 Rev.C1
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> AKAI LTA-22N686HCP Chassis LS03
LTA-15N602M, LTA-15N680HCP, LTA-15N686HCP, LTA-19N508HCP, LTA-22N680HCP, LTA-22N686HCP
The appearance of the MainBoard JUG7.820.510-3 is shown in the figure below:
JUG7.820.510-3
JUG7.820.510-3 can be used on TVs:
AKAI LTA-22N680HCP (Panel M220Z1-L03 REV.C1), AKAI LTA-22N686HCP (Panel M220Z1 -L03 Rev.C1).
The appearance of the power supply
Key features of the AKAI LTA-22N686HCP device:
Installed matrix (LCD panel) M220Z1 -L03 Rev. C1.
The matrix control uses the Timing Controller (T-CON) M22Z01-L03-X + C.
To power the backlight, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the TV AKAI LTA-22N686HCP is carried out by the power module MLT-019L-C, or its analogues.
MainBoard - the main board (motherboard) is a JUG7.820.510-3 module, using Cpu chips: MST718BE-LF, Spi Flash: W25X40AL, Eeprom: 24LC32, Audio: TDA1517P and others.
The TAF6-F2121VH tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: M220Z1-P0A
Type: a-Si TFT-LCD, CELL
Diagonal size: 22.0 inch
Resolution: 1680x1050, WSXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 473.76x296.1 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 6.5% (with Polarizer)
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
Brand: AKAI, Model: LTA-22N686HCP.
Briefly from the TV: LCD, 22 ", 1680x1050, 720p HD, sound: 10W, HDMI connectors: 2.
The composition uses MainBoard JUG7.820.510-3 and an LCD panel (matrix) M220Z1-L03 Rev. C1.
Power Supply Unit (PSU) MLT-019L-C Power Supply.
AKAI LTA-22N686HCP TV with an M220Z1 LCD, diagonal size 22 "(55 cm), 16:10 format. Screen brightness of 300 cd / m² is ensured by backlighting with CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 1000: 1. It is possible to view images in high quality HD with a resolution of 1680x1050 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standard max 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound system 10 W (2x5 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 x4, S-Video, component x2, VGA, HDMI x2. 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, 1360x768.
The power consumed by the TV working in the network mode is 65 watts.
Overall dimensions: 546x456x124 mm.
The mass of the TV: 5.3 kg.
Attention! The AKAI LTA-22N686HCP LCD TV panel M220Z1 -L03 Rev. C1 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!