Technical description and composition of the TV AKAI LTA-15N680HCP, type of panel and applicable modules. The composition of the modules.AKAI
Model: LTA-15N680HCP
Chassis / Version: LS03
Panel: HT156WX1-100
Inverter (backlight): 12V 2Lamp CCFL
Power Supply (PSU): Adapter 12V
MainBoard: JUG7.820.510-4 2009.07.24
IC MainBoard: Cpu: MST718BE-LF, Spi Flash: 25X40AVN1G, Eeprom: 24LC32B, AUDIO: TEA2025B, Audio Processor: CSC2314F
Tuner: TAF6-C2121VH
Technical Specifications LTA-15N680HCP
AKAI LTA-15N680HCP
General recommendations for repairing TV LCD
Possible malfunctions
- The AKAI LTA-15N680HCP TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Most often, with such manifestations, the main adapter power module is found to be faulty.
This model of TV is equipped with an external power adapter adapter type 12V, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes it makes sense to open it and eliminate simple typical defects typical of IPS. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse 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 the remote control. Or for a second, the image may appear immediately after switching on.
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 to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- 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 JUG7.820.510-4 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). In cases of complex repairs of MB (SSB) and with the necessary skills and equipment, sometimes it may be necessary to replace its Cpu chips: MST718BE-LF, Spi Flash: 25X40AVN1G, Eeprom: 24LC32B, AUDIO: TEA2025B, Audio Processor: CSC2314F and other possible malfunctioning components . Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the tuner TAF6-C2121VH, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention! For users and owners of LTA-15N680HCP TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
FIRMWARE FOR SPI FLASH -----------> AKAI LTA-15N680HCP LS03, Main: JUG7.820.510-4 2009.07.24, Panel: HT156WX1-100
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> AKAI LTA-15N680HCP Chassis LS03 LTA-15N602M, LTA-15N680HCP, LTA-15N686HCP, LTA-19N508HCP, LTA-22N680HCP, LTA-22N686HCP
The appearance of the MainBoard JUG7.820.510-4 is shown in the figure below:JUG7.820.510-4
JUG7.820.510-4 can be used on TVs:
AKAI LTA-15N686HCP (Panel HT156WX1-100), AKAI LTA-15N680HCP (Panel HT156WX1-100).
Key features of the AKAI LTA-15N680HCP device:
Installed matrix (LCD panel) HT156WX1-100.
A 12V inverter is used to power the backlight.
To power all internal components of the AKAI LTA-15N680HCP TV, an external adapter 12V type source is used.
MainBoard - the main board (motherboard) is a JUG7.820.510-4 module, using Cpu microcircuits: MST718BE-LF, Spi Flash: 25X40AVN1G, Eeprom: 24LC32B, AUDIO: TEA2025B, Audio Processor: CSC2314F and others.
The TAF6-C2121VH tuner allows you to receive television programs and tune to channels.
Brand: AKAI, Model: LTA-15N680HCP.
Short from TV: LCD, 15 ", 1366x768, 720p HD, sound: 4 watts.
The composition uses MainBoard JUG7.820.510-4 2009.07.24 and an LCD panel (matrix) HT156WX1-100.
Power supply unit external Adapter 12V.
AKAI LTA-15N680HCP TV with an HT156WX1-100 LCD display, 15 "diagonal size, 16: 9 format. 250 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 500: 1. It is possible to view images in high quality HD at a resolution of 1366x768 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 occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i.
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 x2, S-Video, component, VGA. 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 48 watts.
Overall dimensions: 380x307x115 mm.
TV Weight: 3.7 kg.
Attention! The HT156WX1-100 panel of the AKAI LTA-15N680HCP LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!