Technical description and composition of the SAMSUNG UE55HU7000U TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE55HU7000U UE55HU7000
Chassis / Version: TS01
Panel: CY-GH055HGLV3U
LED backlight: DUGE-550DCA-R5 [03/14/17], DUGE-550DCB-R5 [03/14/17]
T-CON: 14Y_D1FU13TMGC4LV0.0
LED driver (backlight): integrated into PSU
PWM LED driver: SEM5027A
MOSFET LED driver: 5R380CE, D5N40
Power Supply (PSU): BN44-00755A PSLF281W07A L55N4_ESM REV 1.1
MainBoard: BN41-02206B BN94-07578M
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: BN40-00294A
Control: WiFi: BN59-01174A WIDT30Q
Appearance
SAMSUNG UE55HU7000U
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE55HU7000U TV does not turn on and does not show any signs of operability. There is no reaction to either the remote control or the control buttons from the front panel.
Typically, with such manifestations, the defect is caused by faulty elements in the BN44-00755A module. It is necessary to verify the presence of secondary supply voltages and, if they are absent, check the power switches and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- 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.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be taken into account 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.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN94-07578M motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software).
We recommend the owners of the UE55HU7000U TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
The appearance of the MainBoard BN41-02206B is shown in the figure below:BN41-02206B
The appearance of the power supply
Main features of the SAMSUNG UE55HU7000U device:
Installed matrix (LED panel) CY-GH055HGLV3U.
The matrix control uses the Timing Controller (T-CON) 14Y_D1FU13TMGC4LV0.0.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SEM5027A PWM controller. As the power elements of the LED driver, keys of the type 5R380CE, D5N40 are used.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE55HU7000U TV is carried out by the BN44-00755A power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02206B module, using CPU, eMMC, DRAM, AUDIO, DC / DC and other chips.
The tuner BN40-00294A provides the reception of television programs and tuning to channels.
