Technical description and composition of the AKAI LTA-32C902 TV, type of panel and applicable modules. The composition of the modules.AKAI
Model: LTA-32C902
Panel: LC320W01 (SL)
T-CON: LC370WX1 / LC320W01
Inverter (backlight): KLS-EE32C1-M
Power Supply (PSU): FSP179-4F01
PWM Power: NCP1013AP065 (Standby 7pin), NCP1014AP065
MainBoard: JUJ7.820.088 - JUJ6.690.035-4
IC MainBoard: MT46V2M32LG-4, TDA9178T / N1, GM1501-BD, AM29LV800DT, 24LC32A, TPA3002D2PHPR
Tuner: TAD5-C2IP1RW TMI4-C22P2RW
Technical Specifications LTA-32C902
AKAI LTA-32C902
General recommendations for repairing TV LCD
Possible malfunctions
- AKAI LTA-32C902 does not turn on at all and does not show any signs of operability. Does not blink indicators and does not respond to control buttons.
With such manifestations, in most cases the FSP179-4F01 power module is faulty. It is necessary to verify the presence of secondary voltages and, if they are absent, check the power switches 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 key can be PWM (PWM) NCP1013AP065 (Standby 7pin), NCP1014AP065. 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. 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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the JUJ7.820.088 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 some cases, to repair the MB board (SSB), it may be necessary to replace the chips - MT46V2M32LG-4, TDA9178T / N1, GM1501-BD, AM29LV800DT, 24LC32A, TPA3002D2PHPR with new or obviously working ones. In cases where BGA technologies are used, defects are usually 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 it is necessary to check the voltage of the tuner TAD5-C2IP1RW TMI4-C22P2RW and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
It should be remembered! Attempts to independently repair the AKAI LTA-32C902 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!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Akai LTA-26C902, Akai LTA-32C902, Akai LTA-37C902
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> FSP179-4F01
Key Features of the AKAI LTA-32C902:
Installed matrix (LCD-panel) LC320W01 (SL).
The matrix control uses the Timing Controller (T-CON) LC370WX1.
To power the backlight used inverter KLS-EE32C1-M.
The necessary supply voltages for all nodes of the AKAI LTA-32C902 TV are generated by the FSP179-4F01 power supply module or its analogs using NCP1013AP065 (Standby 7pin), NCP1014AP065 microcircuits.
MainBoard - the main board (motherboard) is a JUJ7.820.088 module, using chips MT46V2M32LG-4, TDA9178T / N1, GM1501-BD, AM29LV800DT, 24LC32A, TPA3002D2PHPR and others.
Tuner TAD5-C2IP1RW TMI4-C22P2RW provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320W01-SL20
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit)
Response Time: 8/10 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 18 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Trademark: AKAI, Model: LTA-32C902.
Shortly from the TV: LCD, diagonal 32 "(81 cm), there is PIP, there is a satellite tuner.
The composition uses MainBoard JUJ7.820.088 - JUJ6.690.035-4 and the LCD panel (matrix) LC320W01 (SL).
Power Supply Unit (PSU) FSP179-4F01 Power Supply.
AKAI LTA-32C902 TV with an LCD display LC320W01 32 ”(81 cm) diagonal in 16: 9 format. The brightness of the screen is 500 cd / m² by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 600: 1. The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC.
The power of the sound system 10 W (2x5W) 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), RGB, VGA. An output for connecting headphones is provided.
Overall dimensions: 1013x553x113 mm.
TV Weight: 21.5 kg.
Attention! The AKAI LTA-32C902 LCD TV panel LC320W01 (SL) is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!