Technical description and composition of the SAMSUNG UE40ES6540S TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40ES6540S
Chassis / Version: U79A
Panel: LTJ400HV07-L
LED backlight: 40NNB 3D-7032LED-MCPCB-R V2GE-400SMB-R3 (11,12,12)
T-CON: LSJ400HV05-S BN41-01789A
LED driver (backlight): integrated into PSU
PWM LED driver: SLC5012M
MOSFET LED driver: KF9N25D
Power Supply (PSU): BN44-00520C PD46B1QE_CDY
PWM Power: SQD2011K (Standby), SPC7011F (PFC), UCC25600
MOSFET Power: TK8A50D
MainBoard: BN41-01807A BN94-05625P
IC MainBoard: CPU: WT61P805 (Standby); NAND Flash: KLM2G1HE3F-B001; DRAM: K4B2G1646C-HCK0; SOUND: NTP7412S
Tuner: DNSD243VH144A BN40-00236A
Control: IR: A22457A BN41-01831A, Wi-Fi: WIDT20R BN59-01148
Appearance
SAMSUNG UE40ES6540S
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE40ES6540S TV does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up and do not blink.
In such cases, the fault should be sought first in the BN44-00520C power supply module. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches (TK8A50D) and rectifier diodes in the converters for possible breakdown.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the 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, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chips SQD2011K (Standby), SPC7011F (PFC), UCC25600 are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
In such cases, the most likely malfunction of the LED backlight elements. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the 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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-01807A 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). 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 CPU chips: WT61P805 (Standby); NAND Flash: KLM2G1HE3F-B001; DRAM: K4B2G1646C-HCK0; SOUND: NTP7412S and other possible defective components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the DNSD243VH144A BN40-00236A tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding tuner pins and checked for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the repair of electronic equipment.
SCHEMATIC MANUAL ------------> SAMSUNG Chassis U78A/U79A Model: UE**ES61***, UE**ES63***, UE**ES65***, UE**ES67***, UE**ES68***.
The appearance of the MainBoard BN41-01807A is shown in the figure below:
BN41-01807A
BN41-01807A can be used in TVs:
SAMSUNG UE40ES6550S (Panel LTJ400HV05-V), SAMSUNG UE46ES6547U UE46ES6547 (Panel LTJ460HW06-L), SAMSUNG UE40ES7207U (Panel LTJ400HL10-L), SAMSUNG UE46ES6540 UE46ES6540U (Panel LTJ460HW06-L), SAMSUNG UE40ES6750 MXRU (Panel LTJ400HV08-L), SAMSUNG UE32ES6727U UE32ES6727 (Panel LTJ320HW06-L), SAMSUNG UE40ES6757 UE40ES6757M (Panel LTJ400HV08-L), SAMSUNG UE32ES6550 UE32ES6550S (Panel LE320CSM-C1), SAMSUNG UE40ES6540S (Panel LTJ400HV07-L), SAMSUNG UE55ES6760 UE55ES6760SXZG (Panel LTJ550HW10-B), SAMSUNG UE32ES6540 UE32ES6540S (Panel LE320CSM-C1), SAMSUNG UE40ES6727 UE40ES6727U (Panel LTJ400HV08-L), SAMSUNG UE32ES6757M (Panel LE320CSM-C2).
The appearance of the power supply
Main features of the SAMSUNG UE40ES6540S device:
The matrix (LED panel) LTJ400HV07-L is installed.
The matrix control uses the Timing Controller (T-CON) LSJ400HV05-S.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SLC5012M PWM controller. As the power elements of the LED driver, keys of the KF9N25D type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40ES6540S TV are generated by the BN44-00520C power supply module or its analogs using SQD2011K (Standby), SPC7011F (PFC), UCC25600 microcircuits and TK8A50D type power switches.
MainBoard - the main board (motherboard) is a BN41-01807A module, using CPU chips: WT61P805 (Standby); NAND Flash: KLM2G1HE3F-B001; DRAM: K4B2G1646C-HCK0; SOUND: NTP7412S and others.
Tuner DNSD243VH144A BN40-00236A provides the reception of television programs and tuning to channels.
