Technical description and composition of the SAMSUNG UE48JU6400U TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE48JU6400U
Panel: CY-GJ048HGLV1H
LED backlight: LM41-00117A, LM41-00109Z
T-CON: BN41-02297A BN95-01937A
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00807A L55S6_FHD REV: 1.1
MainBoard: BN41-02344B BN94-09021N
Tuner: BN40-00318B GT2S2-5C51 DVB-T2S2
Control: IR: BN41-02324A, WiFi: BN59-01194F WCH730B
Technical Specifications UE48JU6400U
SAMSUNG UE48JU6400U
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE48JU6400U 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 likely in this case, the main switching power supply (IIP) BN44-00807A is faulty. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, 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.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- 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 BN41-02344B 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 a tuner BN40-00318B GT2S2-5C51 DVB-T2S2 is suspected, it is first necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
It should be remembered! Attempts to self-repair a SAMSUNG UE48JU6400U 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!
The appearance of the MainBoard BN41-02344B is shown in the figure below:BN41-02344B
The appearance of the power supply
Main features of the SAMSUNG UE48JU6400U device:
Installed matrix (LED panel) CY-GJ048HGLV1H.
The matrix control uses the Timing Controller (T-CON) BN41-02297A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE48JU6400U TV is carried out by the power module BN44-00807A, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02344B module.
Tuner BN40-00318B GT2S2-5C51 DVB-T2S2 provides the reception of television programs
