Technical description and composition of the SAMSUNG UE40M5000AU TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40M5000AU
Chassis / Version: DB02
Panel: CY-JM040BGNV5V // CY-JM040BGNV2V
LED backlight: SVC 39.5 FCOM FHD 170109
T-CON: V400HJ6-PE1 Rev. CA
LED driver (backlight): integrated into PSU; 730mA
Power Supply (PSU): BN44-00852F L48MSFR_MDY REV 1.1
MainBoard: BN41-02582B BN94-12043K
IC MainBoard: CPU: SENK20-MS, NAND ESTM NT17L 2M
Tuner: BN37-00013A
Control: IR: BN41-02477A REV 2.3
Technical Specifications UE40M5000AU
SAMSUNG UE40M5000AU
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE40M5000AU TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
With similar manifestations, in some cases, the BN44-00852F power module is faulty. Then it is necessary to measure its output voltage and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of converters for the presence of a possible short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the main fuse usually 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 circuits are usually checked by replacement with new ones, or known to be working.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Usually, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. 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 TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-02582B 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). Board repair and replacement of CPU chips: SENK20-MS, NAND ESTM NT17L 2M are made with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If there is no reception of television channels, but the TV works properly from external devices, first of all, check the voltage of the tuner BN37-00013A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
We recommend the owners of the UE40M5000AU TV for repair only to qualified specialists with the necessary work experience! Attempts to repair it yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
The appearance of the MainBoard BN41-02582B is shown in the figure below:BN41-02582B
The appearance of the power supply
Main features of the SAMSUNG UE40M5000AU device:
Installed matrix (LED-panel) CY-JM040BGNV5V or CY-JM040BGNV2V.
The matrix control uses the Timing Controller (T-CON) V400HJ6-PE1.
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 UE40M5000AU TV is carried out by the BN44-00852F power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02582B module using CPU chips: SENK20-MS, NAND ESTM NT17L 2M and others.
The tuner BN37-00013A provides the reception of television programs and tuning to channels.