SAMSUNG UE40J5520AU UE40J5520 Chassis/Version: HS02

abdulwaheed33

SAMSUNG  LED
Model: UE40J5520AU UE40J5520

Chassis/Version: HS02

Panel: CY-GJ040BGSV5V

T-CON: RUNTK5538TP ZA 58A20; Q40A-104GIP (EN25P40)

LED driver (backlight): integrated into PSU

PWM LED driver: 7014X

MOSFET LED driver: 5N40, KF3N40W

Power Supply (PSU): BN44-00703G

MOSFET Power:  13N60M2, 14NM50N

MainBoard: BN41-02353B BN94-09121B Hawk_M_FHD_PRO1

IC MainBoard: CPU: SDP1415, Eeprom: S24C512KEY (24C512), SPI Flash: 25Q40CLSIP (Winb25Q40CL), eMMC

Тuner: BN40-00318B

TV SAMSUNG UE40J5520AU does not turn on at all. The control lamps do not shine or flash. The TV on the remote control and the control panel buttons do not respond.

With such manifestations the power module BN44-00703G usually goes out of order. It is then necessary to measure its output voltages and, if they are not present, it is necessary to check the power switches (13N60M2, 14NM50N) and rectifier diodes of the converters for the short-circuit probability.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and in case of short circuit in the power elements of the primary circuit, the mains fuse or the current sensor in the source of the key is often cut off.
The breakdown of Mos-Fet keys used in impulse sources is often caused by faults of other elements, for example, in the PWM power supply circuit, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM (PWM) S3051 (PFC), FA6A20 chips are usually checked for replacement with new ones or known to work.

- There is no picture, but there is a sound and a reaction to the remote control.  Either for an instant, the image may appear immediately after turning it on.

The In SUCH Cases, The MOST LIKELY failure IS The the LED Backlight Elements.  Of The reason CAN BE both in The Power Supply of The LEDs, in Their Serviceability (Breakdown or breakage), AS Well AS in Breaking The Contact Connections of The the LED Bars.
It Should be remembered that it is not possible to determine the break in the LED lines without disassembling the panel using a tester or multimeter without an additional device, for example, a current source.  To open all PN transitions connected in series at once, a voltage Of several tens of volts may be required.  Then it is necessary to open the panel and check each LED individually with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or apply dual LEd-s, then an indication of serviceability may indirectly be the PN-transition of the emergency stabilitron.  In the case of LED-a failure , the Zener diode junction will either be torn or broken in the R / 3.

- The TV does not turn on, the indicator indicates a standby or operating mode, or blinks.

Should be  , if should, you update or replace the software (software).  In some cases, the repair of the MB (SSB) card may require the replacement of chips - CPU: SDP1415, Eeprom: S24C512KEY (24C512), SPI Flash: 25Q40CLSIP (Winb25Q40CL), eMMC for new or known good.  In cases of BGA technology, defects are usually localized by the Warm-up method.

If the BN40-00318B is suspected of a malfunction, first of all it is necessary to check the correctness of the software, as well as the availability of the required voltage levels and the impulses of data exchange with the processor via the I2C bus at the Corresponding tuner terminals.

Download;Firmware SPI FLASH, EEPROM, T-CON

wim

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