Technical description and composition of the AKAI LT-32Q5LFH TV, type of panel and applicable modules. The composition of the modules.AKAI
Model: LT-32Q5LFH
Chassis / Version: 111-A96C (32)
Panel: LTA320W2-L03
T-CON: 320W2C4LV1-4
Power Supply (PSU): Output Voltage DC 12V, 24V
MainBoard: 111-A84B - 111-A96C (32Q)
IC MainBoard: AC1501 BA6161F SI4925 MST5151A HY5DU283222Q TS482 MAP46xx STA515 VCT49xx K6X8008T2B PCF8574TS
Tuner: TAEM-G083D
Appearance
AKAI LT-32Q5LFH
General recommendations for repairing TV LCD
Possible malfunctions
- The AKAI LT-32Q5LFH TV does not turn on and does not show any signs of turning on. There are no reactions to the control buttons or the remote control.
With such manifestations, a fault is likely to be detected in the Output power module. It is necessary to measure its secondary output voltages, 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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately 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. 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, 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 turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 111-A84B 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). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - AC1501 BA6161F SI4925 MST5151A HY5DU283222Q TS482 MAP46xx STA515 VCT49xx K6X8008T2B PCF8574TS. Defective components should be replaced.
Before changing the tuner TAEM-G083D, if it is not possible to tune to television channels, make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and checked for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Once again, remind users! Attempts to independently repair the AKAI LT-32Q5LFH TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> AKAI LT-32Q5LFH
Key Features of the AKAI LT-32Q5LFH:The matrix (LCD panel) LTA320W2-L03 is installed.
The matrix control uses the Timing Controller (T-CON) 320W2C4LV1-4.
The formation of the necessary supply voltages for all nodes of the AKAI LT-32Q5LFH TV is carried out by the Output power module, or its analogues.
MainBoard - the main board (motherboard) is a 111-A84B module using AC1501 BA6161F SI4925 MST5151A HY5DU283222Q TS482 MAP46xx STA515 VCT49xx K6X8008T2B PCF8574TS and others.
The TAEM-G083D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320W2-L03
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: APVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 40%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V