Technical description and composition of the SAMSUNG UE46F7000 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE46F7000 UE46F7000AT
Chassis / Version: BN41-01973A
Panel: CY-SF460DSLV2V
T-CON: BN41-01939A LSF460HQ01
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00632B L46F2P_DDY
PWM Power: PFC, PWM
MOSFET Power: N-FET TO-220F
MainBoard: BN41-01973A BN94-06186P
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: BN40-00267A DNTT243IH145A
Control: Camera: BN96-26579B
Technical Specifications UE46F7000
SAMSUNG UE46F7000
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE46F7000 TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
With similar manifestations, in some cases, the BN44-00632B power module is faulty. It is necessary to measure its output voltages, and if they are absent (full or partial), you should check the health of the power switches (N-FET TO-220F) of the converters and rectifier diodes for a possible short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often 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, PWM, PWM microchips are usually checked by replacing with new ones, or obviously working.
- 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.
The most likely in these cases is a malfunction of the LED backlight. 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 check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the BN41-01973A 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 must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU, eMMC, DRAM, AUDIO, DC / DC 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.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner BN40-00267A DNTT243IH145A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention! For users and owners of UE46F7000 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Appearance of the MainBoard BN41-01973A is shown in the figure below:BN41-01973A
The appearance of the power supply
Main features of the SAMSUNG UE46F7000 device:
Installed matrix (LED panel) CY-SF460DSLV2V.
The matrix control uses the Timing Controller (T-CON) BN41-01939A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SAMSUNG UE46F7000 TV are generated by the BN44-00632B power module or its analogs using PFC, PWM microcircuits, and N-FET TO-220F type power switches.
MainBoard - the main board (motherboard) is a BN41-01973A module, using CPU, eMMC, DRAM, AUDIO, DC / DC, and others.
The tuner BN40-00267A DNTT243IH145A provides the reception of television programs and tuning to channels.
