Technical description and composition of the SAMSUNG UE55H6800 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE55H6800 UE55H6800AU
Chassis / Version: BN41-02260A
Panel: CY-VH055CSLV1V
T-CON: BN41-02254A 2014_TCON_FOX_FT3_H6800
LED driver (backlight): integrated into PSU
MOSFET LED driver: TO-252
Power Supply (PSU): BN44-00727A L55C2Q_EDY
PWM Power: PFC & PWM
MOSFET Power: N-FET TO-220F
MainBoard: BN41-02260A BN94-07849B
IC MainBoard: CPU, DRAM, eMMC, AUDIO
Tuner: BN40-00292A
Technical Specifications UE55H6800
SAMSUNG UE55H6800
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE55H6800 TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
Failure in such cases should begin to be sought in the power supply circuits BN44-00727A. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (N-FET TO-220F) and rectifier diodes in the converters 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.
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 PFC & PWM chips are usually checked by replacing with new, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. More often the reason for this is the breakdown of the LEDs, or poor contact in the connectors of the strips, less often the LED driver may be malfunctioning.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the BN41-02260A motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU, DRAM, eMMC, AUDIO with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner BN40-00292A. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention to users! Self-repair of a SAMSUNG UE55H6800 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard BN41-02260A is shown in the figure below:BN41-02260A
The appearance of the power supply
Main features of the SAMSUNG UE55H6800 device:
Installed matrix (LED panel) CY-VH055CSLV1V.
The matrix control uses the Timing Controller (T-CON) BN41-02254A.
To power the backlight LEDs, a converter is used, combined with a power supply. As power elements of the LED driver, keys of the TO-252 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE55H6800 TV are generated by the BN44-00727A power module or its analogs using PFC & PWM microcircuits and N-FET TO-220F type power switches.
MainBoard - the main board (motherboard) is a BN41-02260A module, using CPU, DRAM, eMMC, AUDIO, and others.
The tuner BN40-00292A provides the reception of television programs and tuning to channels.
