Technical description and composition of the SAMSUNG UE49M5510AU TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE49M5510AU UE49M5510
Chassis / Version: BN41-02575B
Panel: CY-KK049BGHV3V
LED backlight: EDGE LED
LED driver (backlight): integrated into PSU
MOSFET LED driver: TO-252
Power Supply (PSU): BN44-00872D L55E1K_KSM
PWM Power: PFC, PWM
MOSFET Power: N-FET TO-220F, TO-252
MainBoard: BN41-02575B BN94-11890Z
IC MainBoard: CPU: SDP1604
Tuner: BN40-00331B
Technical Specifications UE49M5510AU
SAMSUNG UE49M5510AU
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE49M5510AU 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 BN44-00872D is found to be faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (N-FET TO-220F) and rectifier diodes of the converters for possible 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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM, PWM, PWM microchips are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and all the other functions of the TV work. The image sometimes for a second appears immediately after turning on and disappears.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason may be a break in the LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the strings
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the BN41-02575B 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 it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU: SDP1604. Defective components should be replaced.
Before changing the tuner BN40-00331B, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
TV users and owners must remember that attempts to self-repair a SAMSUNG UE49M5510AU TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
The appearance of the MainBoard BN41-02575B is shown in the figure below:BN41-02575B
The appearance of the power supply
Main features of the SAMSUNG UE49M5510AU device:
Installed matrix (LED-panel) CY-KK049BGHV3V.
To power the backlight LEDs, a converter is used, combined with a power supply. As power elements of the LED driver, keys of the TO-252 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE49M5510AU TV are generated by the BN44-00872D power module or its analogs using PFC, PWM microcircuits and power switches of the N-FET TO-220F, TO-252 type.
MainBoard - the main board (motherboard) is a BN41-02575B module, using CPU chips: SDP1604 and others.
The tuner BN40-00331B provides the reception of television programs and tuning to channels.
