Technical description and composition of the SAMSUNG UE46EH5007K TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE46EH5007K UE46EH5007
Chassis / Version: TS01
Panel: LTJ460HN05-L
LED backlight: 46-3535LED-72EA-L / R, D1GE-460SCA-R3, D1GE-460SCB-R3
T-CON: BN41-01797A LSJ460HN03-S
LED driver (backlight): integrated into PSU
PWM LED driver: SEM5025
MOSFET LED driver: MDD5N40RH
Power Supply (PSU): BN44-00497A PD46AVF_CSM REV1.3
PWM Power: SPC7011F, D2011K, FSFR1700
MOSFET Power: MDF11N60TH
MainBoard: BN41-01795A BN94-06144E
IC MainBoard: WT61P805, K4B1G1646G-BCH9, 24C256C4VCX, 25Q40BVSIP
Tuner: BN40-00239C DT2X-11B / C3
Control: BN41-01840B BN96-22413C
Appearance
SAMSUNG UE46EH5007K
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE46EH5007K TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In some of these cases, the main switching power supply, the BN44-00497A module, is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (MDF11N60TH) and rectifier diodes of the converters for possible short circuit.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the main fuse or current sensor at the source of the key most often breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) SPC7011F, D2011K, FSFR1700, if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Usually, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, 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 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 BN41-01795A 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements WT61P805, K4B1G1646G-BCH9, 24C256C4VCX, 25Q40BVSIP. BGA chip malfunctions are usually easy to detect by warming up.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner BN40-00239C DT2X-11B / C3 and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
TV users and owners need to remember that attempts to self-repair a SAMSUNG UE46EH5007K TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual --------------> SAMSUNG UE46EH5007K Chassis U71A/U71B.
The appearance of the MainBoard BN41-01795A is shown in the figure below:BN41-01795A
BN41-01795A can be used in TVs:
SAMSUNG UE32EH4000 UE32EH4000W (Panel LTJ320AP03-L), SAMSUNG UE32EH5000W (Panel DE320BGM-C1), SAMSUNG UE26EH4000W (Panel T260XVN01.1), SAMSUNG UE32EH5007K UE32EH5007 (Panel LTJ320HN07-L), SAMSUNG UE32EH5047K UE32EH5047 (Panel DE320BGA-B1), SAMSUNG UE40EH5007K (Panel CY-DE400BGSV1L), SAMSUNG UE32EH5057K (Panel DE320BGA-B1), SAMSUNG UE40FH5007K (Panel CY-DF400BGLV1V), SAMSUNG UE40EH5047K (Panel LTJ400HM08-L), SAMSUNG UE40EH5057K UE40EH5057 (Panel CY-DE400BGSV1L), SAMSUNG UE40EH5050W UE40EH5050 (Panel CY-DE400BGSV1L), SAMSUNG UE40EH5000 UE40EH5000W (Panel LTJ400HM801-V), SAMSUNG UE32EH5000K UE32EH5000 (Panel LTJ320HN07-L), SAMSUNG UE32EH5000W UE32EH5000 (Panel DE320BGM-C1), SAMSUNG LE32E420E2W LE32E420 (Panel LTF320AP13), SAMSUNG UE32EH4030 UE32EH4030W (Panel DE320AGH-C2), SAMSUNG UE46EH5057K UE46EH5057 (Panel LTJ460HN05-L), SAMSUNG UE40EH5040 UE40EH5040W (Panel CY-DE400BGSV1L).
The appearance of the power supply
Main features of the SAMSUNG UE46EH5007K device:
Installed matrix (LED-panel) LTJ460HN05-L.
The matrix control uses the Timing Controller (T-CON) BN41-01797A.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SEM5025 PWM controller. As the power elements of the LED driver, keys of the MDD5N40RH type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE46EH5007K TV are generated by the BN44-00497A power supply module or its analogs using SPC7011F, D2011K, FSFR1700 microchips and MDF11N60TH power switches.
MainBoard - the main board (motherboard) is a BN41-01795A module, using microchips WT61P805, K4B1G1646G-BCH9, 24C256C4VCX, 25Q40BVSIP and others.
The tuner BN40-00239C DT2X-11B / C3 provides the reception of television programs and tuning to channels.
