Technical description and composition of the SAMSUNG LE32A568 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE32A568 32A568P3W
Panel: LTF320HA01 A04
T-CON: 320HAC2LV; THF9301, EM638325TS-7G
Inverter (backlight): SSI320_16B01
PWM Inverter: OZ9968SN
Trans Inverter: LT-3216
Power Supply (PSU): BN44-00208A PSLF171501B
PWM Power: MC33067P, FAN7530, FSQ0365RN
MOSFET Power: 9N50, 11N60
MainBoard: BN41-01022C BN94-02222A
IC MainBoard: WT61P8 823, HYB25DC256163CE-4, NTP3100
Tuner: BN40-00115A
Appearance
SAMSUNG LE32A568
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG 32A568 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
In such cases, the fault should be sought first in the BN44-00208A power supply module. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (9N50, 11N60) and rectifier diodes of the converters for a short circuit probability.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits MC33067P, FAN7530, FSQ0365RN are usually checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by a power supply module, or by inverter defects, 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 in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
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 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 BN41-01022C motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). When repairing an MB board, you need to check its components WT61P8 823, HYB25DC256163CE-4, NTP3100. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-00115A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
For 32A568 TV owners, we recommend that you contact qualified personnel with the necessary work experience for repairs! Attempts to repair it yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
The appearance of the MainBoard BN41-01022C is shown in the figure below:BN41-01022C
The appearance of the power supply
Main features of the SAMSUNG LE32A568 device:
Installed matrix (LCD panel) LTF320HA01 A04.
The matrix control uses the Timing Controller (T-CON) 320HAC2LV ;.
To power the backlight, an SSI320_16B01 inverter is used, it is controlled by the OZ9968SN PWM controller. A transformer LT-3216 is installed in the inverter converter.
The necessary supply voltages for all nodes of the SAMSUNG LE32A568 TV are generated by the BN44-00208A power module or its analogs using MC33067P, FAN7530, FSQ0365RN microcircuits and 9N50, 11N60 power switches.
MainBoard - the main board (motherboard) is a BN41-01022C module, using WT61P8 823, HYB25DC256163CE-4, NTP3100 and others.
The tuner BN40-00115A provides the reception of television programs and tuning to channels.
