Technical description and composition of the SAMSUNG UE40JU6450U TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40JU6450U
Chassis / Version: TD01
Panel: CY-GJ040HGLV1V
LED backlight: S_5U75_40_FL_L04 / R04 REV1.4_150514 LM41-00120S
T-CON: BN95-01936B BN41-02297A 15Y_VU40SRV0.3
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): BN44-00806A L40S6_FDY
MOSFET Power: K8A50D
MainBoard: BN41-02344A BN94-08217J
IC MainBoard: SPI Flash: 25Q40, SOUND: NTP7415
Tuner: BN40-00316B
Control: WIFI: BN59-01194A WCH730B
Technical Specifications UE40JU6450U
SAMSUNG UE40JU6450U
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE40JU6450U 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.
Most often, with such manifestations, the main power module BN44-00806A is found to be faulty. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the mains fuse and, less often, the current sensor at the source of the key are most often cut off.
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 an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and a short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
In some of these cases, a malfunction is caused by a lack of display backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- 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 BN41-02344A 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Testing or replacing elements SPI Flash: 25Q40, SOUND: NTP7415 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If you suspect a malfunction of the tuner BN40-00316B, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and impulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Attention TV owners! Attempts to self-repair SAMSUNG UE40JU6450U are not recommended by the manufacturer and can lead to serious negative consequences!
The appearance of the MainBoard BN41-02344A is shown in the figure below:BN41-02344A
The appearance of the power supply
Main features of the SAMSUNG UE40JU6450U device:
Installed matrix (LED panel) CY-GJ040HGLV1V.
The matrix control uses the Timing Controller (T-CON) BN95-01936B.
To power the backlight LEDs, a converter is used, combined with the main board BN41-02344A.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE40JU6450U television is carried out by the BN44-00806A power module, or its analogs using power switches of the K8A50D type.
MainBoard - the main board (motherboard) is a BN41-02344A module, using SPI Flash chips: 25Q40, SOUND: NTP7415 and others.
The tuner BN40-00316B provides the reception of television programs and tuning to channels.
