Technical description and composition of the SAMSUNG UE49M6550 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE49M6550
Chassis / Version: FA01
Panel: CY-VM049BGLV2V
T-CON: LSF400HN03-G BN41-02292A BN95-02704C
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00872D L55E1R_KSM
MainBoard: BN41-02575B BN94-10502L
IC MainBoard: CPU: SDP1604
Tuner: BN40-00331B
Control: IR: BN41-02515A, Wi-Fi: WCM730Q BN59-01264A
Technical Specifications UE49M6550AU
SAMSUNG UE49M6550
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE49M6550 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. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more 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 microcircuits are usually checked by replacement with new ones, or obviously working.
- 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.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 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 BN41-02575B 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).
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
Attention to users! Self-repair of a SAMSUNG UE49M6550 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
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 UE49M6550 device:
Installed matrix (LED-panel) CY-VM049BGLV2V.
The matrix control uses the Timing Controller (T-CON) LSF400HN03-G.
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 UE49M6550 TV is carried out by the BN44-00872D power module, or its analogues.
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.
