Technical description and composition of the SAMSUNG UE49MU6300 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE49MU6300
Panel: CY-WK049HGLV1V
LED backlight: V6DU-490DCA / B-R0 [04.16.06]
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00807H
MainBoard: BN41-02568B BN94-12424F // BN41-02568A BN94-11703F
IC MainBoard: SDP1601, KLM4G1FEPD, K4F8E30 4HBMGCH, 24512FD, 25Q40CLSIP, 25Q80DVSIG, TAS5749M
Tuner: BN40-00329B
Control: IR: 39955B CVF7601-4, WiFi: BN59-01264A WCM730Q
Technical Specifications UE49MU6300U
SAMSUNG UE49MU6300
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE49MU6300 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
Most likely in this case, the main switching power supply (IIP) BN44-00807H is faulty. 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 case of breakdowns of semiconductors in secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse 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 the excess of maximum current or voltage values. 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, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It should be remembered that it is not possible to determine the break in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions 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 separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
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 elements SDP1601, KLM4G1FEPD, K4F8E30 4HBMGCH, 24512FD, 25Q40CLSIP, 25Q80DVSIG, TAS5749M 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.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner BN40-00329B and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, remind users! Attempts to self-repair a SAMSUNG UE49MU6300 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
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 UE49MU6300 device:
Installed matrix (LED-panel) CY-WK049HGLV1V.
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 UE49MU6300 TV is carried out by the BN44-00807H power supply module, or its analogs.
MainBoard - the main board (motherboard) is a BN41-02568B module, using microchips SDP1601, KLM4G1FEPD, K4F8E30 4HBMGCH, 24512FD, 25Q40CLSIP, 25Q80DVSIG, TAS5749M and others.
The tuner BN40-00329B provides the reception of television programs and tuning to channels.
