Technical description and composition of the SAMSUNG UE40ES6757 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40ES6757 UE40ES6757M
Panel: LTJ400HV08-L
LED backlight: SLED 2012SVS40 7032NNB LEFT / RIGHT56 3D REV1.1 120317
T-CON: LSJ400HV05-S BN41-01789
LED driver (backlight): ntegrated into PSU; 163V 530mA (55), 136V 530mA (46)
PWM LED driver: SLC5012M (MAP3312B)
MOSFET LED driver: KF9N25D
Power Supply (PSU): BN44-00520C PD46B1QE_CDY
PWM Power: UCC25600, SPC7011F (PFC), SQD2011K (Standby)
MOSFET Power: TK8A50D
MainBoard: BN41-01807A BN94-05857K
IC MainBoard: WT61P805, KLM2G1HE3F-B001, K4B2G1646C-HCK0, NTP7412S
Tuner: BN40-00236A
Control: Wi-Fi: BN59-01148B
Technical Specifications UE40ES6757
SAMSUNG UE40ES6757
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE40ES6757 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Failure in such cases should be sought in the BN44-00520C power supply circuits. It is necessary to verify the presence of secondary voltages and, if they are absent, check the power switches (TK8A50D) and rectifier diodes for a probable short circuit.
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.
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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power key may be PWM (PWM) UCC25600, SPC7011F (PFC), SQD2011K (Standby). It is checked only by replacement with a known good one.
- 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.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. 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.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, sometimes you can detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- 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 BN41-01807A 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - WT61P805, KLM2G1HE3F-B001, K4B2G1646C-HCK0, NTP7412S. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
The malfunction of the tuner BN40-00236A is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention! For users and owners of UE40ES6757 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
PSU SCHEMATIC --------------> Power supply BN44-00520C.
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 UE40ES6757 device:
Installed matrix (LED panel) LTJ400HV08-L.
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 (MAP3312B). 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 UE40ES6757 TV are generated by the BN44-00520C power module or its analogs using UCC25600, SPC7011F (PFC), SQD2011K (Standby) microcircuits and TK8A50D type power switches.
MainBoard - the main board (motherboard) is a BN41-01807A module, using microchips WT61P805, KLM2G1HE3F-B001, K4B2G1646C-HCK0, NTP7412S and others.
The tuner BN40-00236A provides the reception of television programs and tuning to channels.
