Technical description and composition of the AKAI LTA-22E307 TV, panel type and applicable modules. The composition of the modules.AKAI
Model: LTA-22E307
Chassis / Version: TD604C
Panel: M220Z1-L05 Rev. C1
T-CON: M220Z1-L03-X + C (not removable)
Inverter (backlight): integrated into PSU
PWM Inverter: BIT3713
Trans Inverter: IVTEFD20001-0830
Power Supply (PSU): IVTA0413-01
MainBoard: B.TD604C
IC MainBoard: Cpu: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P,
Tuner: TDQ-6F6 / T126CW
Technical Specifications LTA-22E307
AKAI LTA-22E307
General recommendations for repairing TV LCD
Possible malfunctions
- The AKAI LTA-22E307 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.
In such cases, the IVTA0413-01 power supply is usually faulty. 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, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the B.TD604C 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). Board repair and replacement of Cpu chips: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P, are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the power supply of the TDQ-6F6 / T126CW tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
TV users and owners must remember that attempts to self-repair an AKAI LTA-22E307 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of the MainBoard B.TD604C is shown in the figure below:B.TD604C
B.TD604C can be used in TVs:
AKAI LTA-22E307 (Panel M220Z1-L05 Rev.C1), IZUMI TL22H615B (Panel M220Z1-L03 Rev.C1), IZUMI TL19H615B (Panel SVA190WX02TB), IZUMI TL22H614B (Panel M220Z1-L03).
The appearance of the power supply
Key Features of the AKAI LTA-22E307:
Installed matrix (LCD panel) M220Z1-L05 Rev. C1.
The matrix control uses the Timing Controller (T-CON) M220Z1-L03-X + C.
To power the backlight, a converter is used, combined with a power supply, controlled by a BIT3713 PWM controller. The transformer IVTEFD20001-0830 is installed in the inverter converter.
The formation of the necessary supply voltages for all nodes of the AKAI LTA-22E307 TV is carried out by the IVTA0413-01 power module, or its analogs.
MainBoard - the main board (motherboard) is a B.TD604C module, using Cpu chips: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P, and others.
The TDQ-6F6 / T126CW tuner provides TV reception and channel tuning.
Information from an alternative source:
Akai LTA-22E307
Panel Type (Matrix): M220Z1-L05 Rev. C1
Motherboard: TD604C, TDA1517P, Tuner: TDQ-6F6 / T126CW,
T-con: M220Z1-L03-X + C (non-removable), PSU &
Invertor: IVTA0413-01, BIT3713, Tr-r: IVTEFD20001-0830 x2
Additional technical information about the panel:
Brand: CMO
Model: M220Z1-L05
Type: a-Si TFT-LCD, Panel
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)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 92%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
Brand: AKAI, Model: LTA-22E307.
Short from TV: LCD, 22 ", 1680x1050, 720p HD, sound: 4 watts.
The composition uses MainBoard B. TD604C and an LCD panel (matrix) M220Z1-L05 Rev. C1.
Power Supply Unit (PSU) IVTA0413-01 Power Supply.
AKAI LTA-22E307 TV with an M220Z1-L05 LCD display, 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 700: 1. You can view images in high quality HD at a resolution of 1680x1050 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 stand max 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 x3, 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.
Overall dimensions: With stand 530x460x210 mm, Without stand 530x370x70 mm.
TV Weight: 5.5 kg.
Attention! The M220Z1-L05 Rev. C1 panel of the AKAI LTA-22E307 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!