Technical description and composition of the SAMSUNG UE46D8000 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE46D8000 UE46D8000YS
Chassis / Version: BN41-01622C
Panel: LTJ460HQ05-V
LED backlight: Edge LED 2 String
T-CON: S240LABMB3V07
LED driver (backlight): integrated into PSU
PWM LED driver: SEM5025
MOSFET LED driver: STU432S
Power Supply (PSU): BN44-00427A PD46B2_BSM PSLF151B03A
PWM Power: ICE2PCS06 (PFC), SQD3011K, UCC25600
MOSFET Power: 10NM60N, MDF9N50
MainBoard: BN41-01622C BN94-05160G
IC MainBoard: SDP1002, SDP94, WT61P805, SIL9489ACTUC, K4B2G1646C-HCH9
Tuner: BN40-00217B
Technical Specifications UE46D8000
SAMSUNG UE46D8000
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE46D8000 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
Most likely in this case, the main switching power supply (IIP) BN44-00427A is faulty. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (10NM60N, MDF9N50) and rectifier diodes of the converters for a short circuit probability.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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 ICE2PCS06 (PFC), SQD3011K, UCC25600 microchips are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
The most likely in these cases is a malfunction of the LED backlight. Often the cause is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the strips (strings), less often the LED driver is malfunctioning.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a malfunction, the zener diode PN junction will either be cut off or broken into short-circuit.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-01622C 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). When repairing an MB board, you need to check its components SDP1002, SDP94, WT61P805, SIL9489ACTUC, K4B2G1646C-HCH9. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Before changing the tuner BN40-00217B, if it is not possible to tune to television channels, make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and checked for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention to users! Self-repair of a SAMSUNG UE46D8000 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard BN41-01622C is shown in the figure below:BN41-01622C
BN41-01622C can be used in TVs:
SAMSUNG UE55D8000YS UE55D8000 (Panel LTJ550HQ11-L), SAMSUNG UE40D8000 UE40D8000YS (Panel LTJ400HL05-L).
The appearance of the power supply
Main features of the SAMSUNG UE46D8000 device:
Installed matrix (LED-panel) LTJ460HQ05-V.
The matrix control uses the Timing Controller (T-CON) S240LABMB3V07.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the SEM5025 PWM controller. As power elements of the LED driver, keys of the STU432S type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE46D8000 TV are generated by the BN44-00427A power module or its analogs using ICE2PCS06 (PFC), SQD3011K, UCC25600 microcircuits and 10NM60N, MDF9N50 type power switches.
MainBoard - the main board (motherboard) is a BN41-01622C module, using microchips SDP1002, SDP94, WT61P805, SIL9489ACTUC, K4B2G1646C-HCH9 and others.
The tuner BN40-00217B provides the reception of television programs and tuning to channels.