Technical description and composition of the SAMSUNG UE49MU6400 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE49MU6400 UE49MU6400U
Chassis / Version: Ver: BA01
Panel: CY-KK049HGEV4V // CY-KK049HGEV5V
LED backlight: Edge LED LM41-00329A, LM41-00329B
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00876A L55E6_KHS
MainBoard: BN41-02568B BN94-11930N
IC MainBoard: CPU: SDP1601 ver: 0.5,
Tuner: BN40-00331A DT0S24EH7A
Technical Specifications UE49MU6400U
SAMSUNG UE49MU6400
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE49MU6400 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.
In some of these cases, a fault is detected in the BN44-00876A power supply module. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
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 short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-02568B 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. Checking or replacing CPU elements: SDP1601 ver: 0.5, requires the necessary training and professional skills for repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before replacing the BN40-00331A DT0S24EH7A tuner, if there is no tuning for the channels, first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
The appearance of the MainBoard BN41-02568B is shown in the figure below:BN41-02568B
The appearance of the power supply
Main features of the SAMSUNG UE49MU6400 device:
Installed matrix (LED panel) CY-KK049HGEV4V or CY-KK049HGEV5V.
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 UE49MU6400 TV is carried out by the BN44-00876A power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02568B module, using CPU chips: SDP1601 ver: 0.5, and others.
The tuner BN40-00331A DT0S24EH7A provides the reception of television programs and tuning to channels.
