Technical description and composition of the SAMSUNG UE55H8000 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE55H8000 UE55H8000AT
Chassis / Version: TD01
Panel: CY-VH055DSLV1V
LED backlight: 2014SVS55 7032SNB H8000 L88 REV1.0
T-CON: LSF550HQ02
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00727A L55CQ2_EDY
MainBoard: BN41-02189A BN94-07390J
IC MainBoard: STB: WT61P807, DRAM: K4B4G1646D-BCK0, Audio: TAS5747
Tuner: BN40-00278
Control: IR: BN96-31812B (A31812B) BN41-02187B
Technical Specifications UE55H8000
SAMSUNG UE55H8000
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE55H8000 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In some of these cases, a fault is detected in the BN44-00727A power supply module. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-02189A 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). Often, the MB (SSB) card needs to be replaced in case of complex faults that are difficult to detect. When trying to repair, you should check its elements - STB: WT61P807, DRAM: K4B4G1646D-BCK0, Audio: TAS5747 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before changing the tuner BN40-00278, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software 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 UE55H8000 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
Led Backlight CY-VH055DSLV1V: VH80-550SMA-R0 (01/14/10), VH80-550SMB-R1 (01/14/10)
The appearance of the MainBoard BN41-02189A is shown in the figure below:BN41-02189A
The appearance of the power supply
Main features of the SAMSUNG UE55H8000 device:
Installed matrix (LED-panel) CY-VH055DSLV1V.
The matrix control uses the Timing Controller (T-CON) LSF550HQ02.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE55H8000 TV is carried out by the power module BN44-00727A, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02189A module, using STB chips: WT61P807, DRAM: K4B4G1646D-BCK0, Audio: TAS5747 and others.
The tuner BN40-00278 provides the reception of television programs and tuning to channels.
