Technical description and composition of the SAMSUNG UE46ES6557 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE46ES6557 UE46ES6557U
Panel: LTJ460HW06-L
LED backlight: V2GE-460SMB-R3, V2GE-460SMA-R3
T-CON: BN41-01789A LSJ460HW05-S
LED driver (backlight): integrated into PSU
PWM LED driver: SLC5012M
MOSFET LED driver: KF9N25D
Power Supply (PSU): BN44-00520C PD46B1QE_CDY
PWM Power: SQD2011K (Stb), SPC7011F (PFC), UCC25600
MOSFET Power: TK8A50D
MainBoard: BN41-01807A BN94-05898F
IC MainBoard: WT61P805, KLM2G1HE3F-B001, K4B2G1646C-HCK0, NTP7412S
Tuner: BN40-00236A
Control: WIFI: WIDT20R, BLUETOOTH: BN96-21431C WIBT30A
Technical Specifications UE46ES6557
SAMSUNG UE46ES6557
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE46ES6557 TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
In such cases, a malfunction should be sought in the power supply circuits of the BN44-00520C. 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 power switches (TK8A50D) of converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible key parameters. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers SQD2011K (Stb), SPC7011F (PFC), UCC25600, in the absence of visible damage or frank short-circuit between the terminals, are 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.
Often in such cases, there is no LED backlight. 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.
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 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, you should update or replace the software (software). Often, the MB (SSB) card must be replaced if it encounters complex problems that are difficult to detect. When trying to repair, you should check its elements - WT61P805, KLM2G1HE3F-B001, K4B2G1646C-HCK0, NTP7412S and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
If a tuner BN40-00236A is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and impulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
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 UE46ES6557 device:
Installed matrix (LED-panel) LTJ460HW06-L.
The matrix control uses the Timing Controller (T-CON) BN41-01789A.
To power the backlight LEDs, a converter is used, combined with the power supply, 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 UE46ES6557 television are generated by the BN44-00520C power module or its analogs using SQD2011K (Stb), SPC7011F (PFC), UCC25600 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.