Technical description and composition of the SAMSUNG UE65F9000 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE65F9000 UE65F9000AT
Chassis / Version: BN41-01950C
Panel: CY-KF650FSLV2V
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00675B L65D2L_DDY
PWM Power: PFC, PWM
MOSFET Power: N-FET TO-220F
MainBoard: BN41-01950C BN94-06650A, BN41-02038D
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: BN40-00267A
Technical Specifications UE65F9000
SAMSUNG UE65F9000
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE65F9000 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
In some of these cases, a fault is detected in the BN44-00675B power module. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (N-FET TO-220F) and the rectifier diodes of the converters for a short circuit probability.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) PFC, PWM, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- 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. 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.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-01950C 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). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU, eMMC, DRAM, AUDIO, DC / DC. Defective components should be replaced.
If a tuner BN40-00267A is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and impulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
TV users and owners need to remember that attempts to self-repair a SAMSUNG UE65F9000 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of the MainBoard BN41-01950C is shown in the figure below:BN41-01950C
The appearance of the power supply
Main features of the SAMSUNG UE65F9000 device:
Installed matrix (LED-panel) CY-KF650FSLV2V.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SAMSUNG UE65F9000 TV are generated by the BN44-00675B power module or its analogs using PFC, PWM microcircuits, and N-FET TO-220F type power switches.
MainBoard - the main board (motherboard) is a BN41-01950C module, using CPU, eMMC, DRAM, AUDIO, DC / DC, and others.
The tuner BN40-00267A provides the reception of television programs and tuning to channels.
