Technical description and composition of the SAMSUNG UE46D5500 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE46D5500
Chassis / Version: U66A
Panel: LTJ460HN01
LED driver (backlight): integrated into PSU
PWM LED driver: SEM5025
Power Supply (PSU): BN44-00422A
PWM Power: SPC7011F, D2011K (Standby), FSFR1700XS
MainBoard: BN41-01660B
IC MainBoard: SEMS21 1108A-LF, K9GAG08U0E
Tuner: BN40-00196A
Technical Specifications UE46D5500
SAMSUNG UE46D5500
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SAMSUNG UE46D5500 TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or the remote control.
With such manifestations, a malfunction is most likely to be detected in the BN44-00422A power supply module. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually 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 (Standby), FSFR1700XS, if they do not have visible damage to the case 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. Or the image may appear for a second when turned on and immediately disappears.
Failure in most such cases is detected in the nodes and backlight elements 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 health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can test each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-01660B 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 in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SEMS21 1108A-LF, K9GAG08U0E 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.
Before replacing the tuner BN40-00196A, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention TV owners! Attempts to self-repair SAMSUNG UE46D5500 are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual and schematic diagram ----------------------> SAMSUNG UE46D5500 Chassis U66A
The appearance of the MainBoard BN41-01660B is shown in the figure below:BN41-01660B
BN41-01660B can be used in TVs:
SAMSUNG UE40D5500 UE40D550K1W UE40D5500RW (Panel LD400BGB-A2), SAMSUNG UE37D5520RW UE37D5520 (Panel LD370BGB-C1), SAMSUNG UE37D5500 RW (Panel LD370BGB-C1).
The appearance of the power supply
Main features of the SAMSUNG UE46D5500 device:
Installed matrix (LED-panel) LTJ460HN01.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SEM5025 PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE46D5500 TV are generated by the BN44-00422A power module or its analogs using SPC7011F, D2011K (Standby), FSFR1700XS microcircuits.
MainBoard - the main board (motherboard) is a BN41-01660B module, using microchips SEMS21 1108A-LF, K9GAG08U0E and others.
The tuner BN40-00196A provides the reception of television programs and tuning to channels.
