Technical description and composition of the SAMSUNG UE40MU6470U TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40MU6470U
Panel: CY-KK040HGNV8V
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00875C L40E6R_KSM
MainBoard: BN41-02568B BN94-11958K
IC MainBoard: SDP1601, KLM4G1FEPD, K4F8E30 4HBMGCH, 24512FD, 25Q40CLSIP, 25Q80DVSIG, TAS5749M
Tuner: BN40-00329B
Control: WIFI: WCM730Q
Technical Specifications UE40MU6470U
SAMSUNG UE40MU6470U
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE40MU6470U TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
In such cases, the malfunction should be sought first in the BN44-00875C power supply module. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns of semiconductors in secondary circuits, the converter can usually work abnormally in short circuit mode, and during short circuit in the power elements of the primary circuit, the main 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 circuits are usually checked by replacement with new ones, or known to be working.
- 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.
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 TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-02568B 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). When repairing an MB board, you need to check its components SDP1601, KLM4G1FEPD, K4F8E30 4HBMGCH, 24512FD, 25Q40CLSIP, 25Q80DVSIG, TAS5749M. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Before changing the tuner BN40-00329B, 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 UE40MU6470U are not recommended by the manufacturer and can lead to serious negative consequences!
The appearance of the MainBoard BN41-02568B is shown in the figure below:BN41-02568B
The appearance of the power supply
Main features of the SAMSUNG UE40MU6470U device:
Installed matrix (LED panel) CY-KK040HGNV8V.
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 UE40MU6470U TV is carried out by the BN44-00875C power supply module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02568B module, using microchips SDP1601, KLM4G1FEPD, K4F8E30 4HBMGCH, 24512FD, 25Q40CLSIP, 25Q80DVSIG, TAS5749M and others.
The tuner BN40-00329B provides the reception of television programs and tuning to channels.