Technical description and composition of the TV AKAI LTA-32N576HCP, type of panel and applicable modules. The composition of the modules.AKAI
Model: LTA-32N576HCP
Chassis / Version: CV068M1
Panel: V315B3-L04
T-CON: V315B3-C04
Inverter (backlight): T87I029.14
PWM Inverter: BD9215FV
MOSFET Inverter: AOD4184
Power Supply (PSU): AYP418101
PWM Power: L6562D, LD7535
MainBoard: CV068M1
IC MainBoard: MST9E19A-LF, TPA3008D4052, Pi5V330SQT, Spi Flash: EN25F40, Eeprom: 24C32
Tuner: JS-6H2 / 121
Control: HOF08J001
Technical Specifications LTA-32N576HCP
AKAI LTA-32N576HCP
General recommendations for repairing TV LCD
Possible manifestations of defects
- The AKAI LTA-32N576HCP TV does not turn on at all. The control lights do not light or flash. On the remote control and the buttons on the control panel does not respond.
With such manifestations, in most cases, the AYP418101 power module is faulty. It is necessary to measure its output voltages and, if they are absent, to check for short-circuit probabilities in the converters, power switches and rectifier diodes.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the 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 also be PWM (PWM) L6562D, LD7535. It is checked only by replacement with a known good one.
- 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.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. 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 CV068M1 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MST9E19A-LF, TPA3008D4052, Pi5V330SQT, Spi Flash: EN25F40, Eeprom: 24C32 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the tuner JS-6H2 / 121. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
It should be remembered! Attempts to independently repair the AKAI LTA-32N576HCP 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 LTA-32N576HCP, Main: CV068M1, Panel: V315B3-L04
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> AYP418101
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> AKAI LTA-32N576HCP Chassis CV068M3_V2.2
The appearance of the MainBoard CV068M1 is shown in the figure below:CV068M1
CV068M1 can be used in TVs:
AKAI LTA-2676P (Panel V260B1-L01 rev C2), AKAI LTA-32N576HCP (Panel V315B3-L04).
The appearance of the power supply
Key features of the AKAI LTA-32N576HCP device:
Installed matrix (LCD panel) V315B3-L04.
The matrix control uses the Timing Controller (T-CON) V315B3-C04.
To power the backlight, an inverter T87I029.14 is used, it is controlled by the BD9215FV PWM controller. As power elements of the inverter, keys of the AOD4184 type are used.
The necessary supply voltages are generated for all nodes of the AKAI LTA-32N576HCP TV by the AYP418101 power module, or its analogs using L6562D, LD7535 microcircuits.
MainBoard - the main board (motherboard) is a CV068M1 module, using microcircuits MST9E19A-LF, TPA3008D4052, Pi5V330SQT, Spi Flash: EN25F40, Eeprom: 24C32 and others.
The JS-6H2 / 121 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V315B3-L04
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Brightness: 450 cd / m²
Contrast Ratio: 2500: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Brand: AKAI, Model: LTA-32N576HCP.
Briefly from the TV: LCD, 32 ", 1366x768, 720p HD, there is PIP, sound: 20 watts.
The composition uses MainBoard CV068M1 and an LCD panel (matrix) V315B3-L04.
Power Supply Unit (PSU) AYP418101 Power Supply.
AKAI LTA-32N576HCP TV with V315B3-L04 LCD, 32 "(81 cm) diagonal size in 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Dynamic contrast ratio of 2500: 1 is achieved by special You can 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 generation of a digital signal occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound system 20 W (2x10 W) provides 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 x2, audio x3, S-Video, component, SCART, VGA, HDMI. 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 200 watts.
Overall dimensions: 797x583x233 mm.
Attention! The AKAI LTA-32N576HCP LCD TV panel V315B3-L04 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!