Technical description and composition of the SAMSUNG LE52A856S1M TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE52A856S1M
Chassis / Version: N59E
Panel: LTF520HE04
T-CON: FRCM_TCON_V0.1 (DNLE7PSEMP73 / LMU4148T1 / WT61P6S)
Inverter (backlight): SSI520_28B01 rev 0.3
Power Supply (PSU): BN44-00240A PSLF311501A
MainBoard: BN41-01063B L850 L950
IC MainBoard: WT61P8, SIL9185CTU, NTP-3100
Tuner: BN40-00126A
Technical Specifications LE52A856S1M
SAMSUNG LE52A856S1M
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE52A856S1M does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
Failure in such cases should begin to be sought in the power supply circuits of BN44-00240A. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, there is a reaction 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 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.
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 operations, 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 enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-01063B 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - WT61P8, SIL9185CTU, NTP-3100. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If there is no reception of television channels, but the TV works properly from external devices, first of all, check the voltage of the tuner BN40-00126A 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 SAMSUNG LE52A856S1M 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!
Service manual --------> SAMSUNG LE40A856S, LE46A856S, LE52A856S Chassis N59E.
The appearance of the MainBoard BN41-01063B is shown in the figure below:BN41-01063B
Main features of the device SAMSUNG LE52A856S1M:
Installed matrix (LCD panel) LTF520HE04.
The matrix control uses the Timing Controller (T-CON) FRCM_TCON_V0.1.
To power the backlight used inverter SSI520_28B01.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE52A856S1M TV is carried out by the BN44-00240A power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-01063B module, using WT61P8, SIL9185CTU, NTP-3100 chips, and others.
The tuner BN40-00126A provides the reception of television programs and tuning to channels.