SAMSUNG
Model: UE49K6500 UE49K6500BU
Panel: CY-VK049BQLV1V
T-CON: BN41-02481A
Inverter (backlight): integrated into PSU
Power Supply (PSU): BN44-00872A L55E1_KDY
MainBoard: BN41-02534B
IC MainBoard: CPU: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG
Tuner: BN40-00316A
Technical Specifications UE49K6500AU
SAMSUNG UE49K6500
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG UE49K6500 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.
Most often, with such manifestations, the main power module BN44-00872A is found to be faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete 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.
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 a 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, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter for the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during operations, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-02534B 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). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG which may require replacement with new ones. If the BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner BN40-00316A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Owners and users of the SAMSUNG UE49K6500 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
The appearance of the MainBoard BN41-02534B is shown in the figure below:BN41-02534B
BN41-02534B can be used in TVs:
SAMSUNG UE40K5500 (Panel CY-KK040BGLV1V), SAMSUNG UE32K5500 UE32K5500AW (Panel CY-KK032BGAV1V), SAMSUNG UE49K5500 UE49K5500BU (Panel CY-KK049BGLV1V).
The appearance of the power supply
Main features of the SAMSUNG UE49K6500 device:
Installed matrix (LCD panel) CY-VK049BQLV1V.
The matrix control uses the Timing Controller (T-CON) BN41-02481A.
To power the backlight, a converter is used, combined with the power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE49K6500 TV is carried out by the power module BN44-00872A, or its analogs.
MainBoard - the main board (motherboard) is a BN41-02534B module, using CPU chips: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG and others.
The tuner BN40-00316A provides the reception of television programs and tuning to channels.
