Technical description and composition of the SAMSUNG UE49M5000AU TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE49M5000AU
Chassis / Version: CA01
Panel: CY-JM049BGHV1V
LED backlight: LM41-00145A, LM41-00146A
T-CON: TT4851B01-3-C-4
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00856C L50MSFR_MDY
MainBoard: BN41-02582A BN94-12045K
IC MainBoard: CPU: SENK20-MS, NAND flash: ESTM
Tuner: BN40-00331B
Control: IR: BN41-02477A BN96-38694E
Technical Specifications UE49M5000AU
SAMSUNG UE49M5000AU
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE49M5000AU TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
In some of these cases, the main switching power supply, the BN44-00856C module, is faulty. It is then necessary to measure its output voltages and, if they are absent, it is necessary to check the power switches and rectifier diodes of the converters for a short-circuit probability.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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.
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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 BN41-02582A 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU: SENK20-MS, NAND flash: ESTM and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
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
We recommend the owners of the UE49M5000AU TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
The appearance of the MainBoard BN41-02582A is shown in the figure below:BN41-02582A
Main features of the SAMSUNG UE49M5000AU device:
Installed matrix (LED-panel) CY-JM049BGHV1V.
The matrix control uses the Timing Controller (T-CON) TT4851B01-3-C-4.
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 UE49M5000AU TV is carried out by the BN44-00856C power supply module, or its analogs.
MainBoard - the main board (motherboard) is a BN41-02582A module, using CPU chips: SENK20-MS, NAND flash: ESTM and others.
The tuner BN40-00331B provides the reception of television programs and tuning to channels.
