Technical description and composition of the SAMSUNG UE40EH6037 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40EH6037 UE40EH6037K
Panel: LTJ400HV11-L
T-CON: LSJ400HV05-S BN41-01892A
LED driver (backlight): integrated into PSU; 265V 289mA
PWM LED driver: SLC3011M, 9012M
MOSFET LED driver: 13NM60N, MDD5N40
Power Supply (PSU): BN44-00552A PD46CV1_CSM
PWM Power: FSFR1700XS, SPC7011F (PFC = FA5695N), SQD2011K (Standby)
MOSFET Power: 13NM60N (PFC)
MainBoard: BN41-01894A - BN94-05908B
IC MainBoard: 25Q40, AOZ1051PI, 1117
Tuner: BN40-00239B
Technical Specifications UE40EH6037
SAMSUNG UE40EH6037
General repair guidelines for TV LCD LED
If the TV does not turn on, no control lights are on or blinking, there are no sounds when you turn on, not the slightest sign of operability - the most likely malfunction is in the power module. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is checked by replacing it with a known good one.
Sometimes the SAMSUNG UE40EH6037 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a possibility of a malfunction of the LED driver - power converter for the backlight LEDs of the LTJ400HV11-L panel, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the operability of the electrolytic capacitors of the filter by the power of the backlight unit.
In case of breaks in the LED circuit, a complete disassembly of the panel is required, the LEDs are checked for an open circuit, as well as the reliability of the connections in the connectors and rations of the terminals of the connectors.
When trying to identify a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
Repair or diagnostics of the motherboard BN41-01894A - BN94-05908B should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update the software (software).
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements 25Q40, AOZ1051PI, 1117. Faults in BGA chips are usually easy to detect by heating.
If you suspect a malfunction of the tuner BN40-00239B, first of all, you need 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 only to professionals with sufficient experience in the field of repair of electronic equipment.
PSU SCHEMATIC --------------> Power Supply BN44-00473A.
PSU SCHEMATIC Samsung --------------> BN44-00520C Power supply
The appearance of the MainBoard BN41-01894A is shown in the figure below:
BN41-01894A
BN41-01894A can be used in TVs:
SAMSUNG UE32EH6037K (Panel LTJ320HW10-L), SAMSUNG UE46EH6037 K (Panel LTJ460HW10-L), SAMSUNG UE40EH6037 (Panel LTJ400HV11-L), SAMSUNG UE46EH6030 (Panel LTJ460HW10-V).
PSU Advanced
The power module BN44-00552A is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced by the device into the mains. The PFC node is a Step-Up Converter based on a PWM controller SPC7011F = FA5695N, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the pulse amplitude (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of the increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG UE40EH6037 device:
Installed matrix (LED panel) LTJ400HV11-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, controlled by a PWM controller SLC3011M, 9012M. As power elements of the LED driver, keys of the type 13NM60N, MDD5N40 are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40EH6037 TV are generated by the BN44-00552A power module or its analogs using the FSFR1700XS, SPC7011F (PFC = FA5695N), SQD2011K (Standby) microcircuits, and 13NM60N (PFC) type power switches.
MainBoard - the main board (motherboard) is a BN41-01894A module, using 25Q40 chips, AOZ1051PI, 1117 and others.
The tuner BN40-00239B provides the reception of television programs and tuning to channels.
