Technical description and composition of the SAMSUNG UE32M5550AU TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE32M5550AU
Chassis / Version: BN41-02575B
Panel: CY-KM032BGLV4V
T-CON: BN41-02292A BN95-04014A
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): BN44-00869B
MainBoard: BN41-02575B BN94-11891U
IC MainBoard: CPU: SDP1604
Tuner: BN40-00331B
Technical Specifications UE32M5550AU
SAMSUNG UE32M5550AU
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE32M5550AU TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or the remote control.
Failure in such cases should begin to be sought in the power supply circuits BN44-00869B. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
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 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 key parameters. 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, the screen is black, there is sound, with external illumination of the screen, you can sometimes see barely noticeable outlines of the image.
Failure is usually in these cases is the backlight matrix (LED-panel). Often the cause of the malfunction is the lack of current in the LED circuit, for example, an open or short circuit, or a violation of the contact connections of the connectors.
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. Usually, 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 a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- 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, you should 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 must 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 TV owners! Attempts to self-repair SAMSUNG UE32M5550AU are not recommended by the manufacturer and can lead to serious negative consequences!
The appearance of the MainBoard BN41-02575B is shown in the figure below:BN41-02575B
Main features of the SAMSUNG UE32M5550AU device:
Installed matrix (LED panel) CY-KM032BGLV4V.
The matrix control uses the Timing Controller (T-CON) BN41-02292A.
To power the backlight LEDs, a converter is used, combined with the main board BN41-02575B.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE32M5550AU TV is carried out by the BN44-00869B 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.
