Technical description and composition of the AKAI LTC-15S04 TV, panel type and applicable modules. The composition of the modules.AKAI
Model: LTC-15S04 LTC-15S04M
Panel: LTA150XH-L06
Inverter (backlight): MI04BIT012-24 rev1.0 4 lamp
Trans Inverter: Optics 1200
Power Supply (PSU): Adapter 12V 4A
MainBoard: B.SPC81B-1 924
IC MainBoard: Spi Flash: 25Q80, Eeprom: 24C32, Audio: YD1517P
Tuner: TDQ-6F6 / T126CW
Technical Specifications LTC-15S04M
AKAI LTC-15S04
General recommendations for repairing TV LCD
Possible manifestations of defects
- The AKAI LTC-15S04 TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
In the vast majority of such cases, a malfunction is detected in the Adapter power module.
The owner of the TV can purchase an external power supply unit such as Adapter and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. It is necessary to measure its secondary output voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
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 be PWM (PWM). It is checked only by replacement with a known good one.
- 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.
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. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
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 B.SPC81B-1 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). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard - Spi Flash: 25Q80, Eeprom: 24C32, Audio: YD1517P. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the TDQ-6F6 / T126CW tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
Repair MainBoard
The appearance of the MainBoard B.SPC81B-1 is shown in the figure below:
B.SPC81B-1
B.SPC81B-1 can be used in TVs:
AKAI LTC-15S04 LTC-15S04M (Panel LTA150XH-L06), BBK LD2424HDU (Panel HT235F01-100), FUSION FLTV-19W6 (Panel M190A1-P0A), FUSION FLTV-22W6 (Panel CLAA215FA), IZUMI TL22F405R (Panel M215HW01 V.0), IZUMI TL22F405B (Panel M215HW01 V.0), IZUMI TL19H405B (Panel M190MWW3).
Key Features of the AKAI LTC-15S04:
Installed matrix (LCD panel) LTA150XH-L06.
To power the backlight used inverter MI04BIT012-24. The transformer optics 1200 is installed in the inverter converter.
To power all the internal components of the AKAI LTC-15S04 TV, an external adapter type 12V 12V 4A is used.
MainBoard - the main board (motherboard) is a B.SPC81B-1 module, using Spi Flash chips: 25Q80, Eeprom: 24C32, Audio: YD1517P and others.
The TDQ-6F6 / T126CW tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA150XH-L06
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.1x228.1 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 400: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 65%
Response Time: 5/20 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3V
Brand: AKAI, Model: LTC-15S04M.
Shortly from the TV: LCD, built-in DVD player, 15 ", 1024x768, 720p HD, sound: 6 watts.
The composition includes MainBoard B.SPC81B-1 and LCD panel (matrix) LTA150XH-L06.
AKAI LTC-15S04M TV with LTA150XH-L06 LCD, 15 "(38 cm) diagonal size, 4: 3 format. 250 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Maximum brightness to minimum ratio (contrast) ) is 450: 1. You can view images in high quality HD at a resolution of 1024x768 pixels in the standard for 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 standard max 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: MP3, MPEG4, VideoCD, Picture CD, JPEG.
The power of the acoustic system of sound 6 W (2x3 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, SCART, RGB, VGA, HDMI, USB. 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: With stand 365x335x110 mm, Without stand 365x319x70 mm.
TV Weight: 3.5 kg.
Attention! The LTA150XH-L06 panel of the AKAI LTC-15S04M 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!
