Technical description and composition of the SAMSUNG UE40F6540AB TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40F6540AB
Panel: CY-GF400CSLV3V // CY-GF400CSLV7V
LED backlight: D2GE-400SCA-R3 (12,12,28), D2GE-400SCB-R3 (12,12,28) LED 3535 = A127CECEBUP8
T-CON: BN97-06996B (BN41-01939) // BN96-27235A
LED driver (backlight): integrated into PSU
PWM LED driver: SLC2013M
Power Supply (PSU): BN44-00622B
PWM Power: FSFR1800HS, SPC7011F (PFC), SQD3011K (STR3A161HD)
MOSFET Power: STF13NM60 (PFC)
MainBoard: BN41-01958B BN94-06736T // BN94-07099H BN41-01958A
IC MainBoard: SEMS30, WT61P807, 24C256, 25Q40, K4B2G1646E, KLM4G1FE3B,
Tuner: BN40-00262A
Control: WIFI: WIDT30Q BN59-01161A
Technical Specifications UE40F6540
SAMSUNG UE40F6540AB
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE40F6540AB TV does not turn on and does not show any signs of turning on at all. There are no reactions to the control buttons or the remote control.
With such manifestations, the BN44-00622B power module usually fails. It is necessary to measure the output voltages in the secondary circuits, and if they are absent, check the operability of the power switches of the converters and rectifier diodes for a possible breakdown (short circuit).
In the event of breakdowns in the secondary circuits, the converter may emergencyly operate in the short circuit mode, and during a short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip FSFR1800HS, SPC7011F (PFC), SQD3011K (STR3A161HD) can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It should be remembered that it is not possible to determine the break in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a malfunction, the zener diode PN junction will either be cut off or broken into short-circuit.
- 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 BN41-01958B 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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips SEMS30, WT61P807, 24C256, 25Q40, K4B2G1646E, KLM4G1FE3B, and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the tuner BN40-00262A. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
TV users and owners need to remember that attempts to self-repair a SAMSUNG UE40F6540AB TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of the MainBoard BN41-01958B is shown in the figure below:BN41-01958B
BN41-01958B can be used in TVs:
SAMSUNG UE39F5500 UE39F5500AK (Panel HF390BGM-C1), SAMSUNG UE32F5300AK (Panel HF320BGA-B1), SAMSUNG UE40F6200AK (Panel CY-HF400BGLV2V), SAMSUNG UE32F4500AK (Panel HF32AGH-R1), SAMSUNG UE42F5300AK (Panel CY-HF420BGAV1V), SAMSUNG UE46F6500 AK (Panel CY-HF400CSLV1V), SAMSUNG UE46F6330AK UE46F6330 (Panel CY-HF460CSLV2V), SAMSUNG UE32F6330 AK (Panel CY-HF320CSLV1V), SAMSUNG UE40F6330AK UE40F6330 (Panel CY-HF400CSLV5V), SAMSUNG UE40F6510AB UE40F6510 (Panel CY-GF400CSLV2V), SAMSUNG UE55F6400AK UE55F6400 (Panel CY-HF550CSLV1V), SAMSUNG UE40F6540AB (Panel CY-GF400CSLV3V), SAMSUNG UE40F6500 UE40F6500SS (Panel CY-GF400CSLV1H), SAMSUNG UE46F6650 UE46F6650AB (Panel CY-GF460CSLV1V), SAMSUNG UE46F6510 UE46F6510AB (Panel CY-GF460CSLV2V), SAMSUNG UE50F6330 UE50F6330AK (Panel HF500CSA-B1).
The appearance of the power supply
Main features of the SAMSUNG UE40F6540AB device:
Installed matrix (LED panel) CY-GF400CSLV3V or CY-GF400CSLV7V.
The matrix control uses the Timing Controller (T-CON) BN97-06996B.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SLC2013M PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE40F6540AB TV are generated by the BN44-00622B power supply module or its analogs using the FSFR1800HS, SPC7011F (PFC), SQD3011K (STR3A161HD) microcircuits and the STF13NM60 (PFC) type power switches.
MainBoard - the main board (motherboard) is a BN41-01958B module, using chips SEMS30, WT61P807, 24C256, 25Q40, K4B2G1646E, KLM4G1FE3B, and others.
The tuner BN40-00262A provides the reception of television programs and tuning to channels.
