Technical description and composition of the SAMSUNG UE46F5020 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE46F5020 UE46F5020AK
Chassis / Version: TP01 UE46F5020AKXRU
Panel: CY-HF460BGLV1V
LED backlight: D2GE-460SCA-R3 [13,01,14], D2GE-460SCB-R3 [13,01,14]
T-CON: BN41-01938A BN95-0860A LSF460HN02
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00610B L46SF_DPN
PWM Power: FA5695N, SQD2011K (Stb), FSFR1700XC
MOSFET Power: KF12N60
MainBoard: BN41-01955A BN94-06292S
IC MainBoard: CPU: SEMS29, SPI Flash: W25Q40BL, EEPROM: 24C256C, SOUND: NTP7412S;
Tuner: BN40-00256A
Control: IR: BN41-01976A BN96-26411C
Technical Specifications UE46F5020
SAMSUNG UE46F5020
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE46F5020 TV does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up and do not blink.
With such manifestations, in some cases, the BN44-00610B power module is faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (KF12N60) and rectifier diodes in the converters for a short circuit.
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.
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 microchips FA5695N, SQD2011K (Stb), FSFR1700XC are usually checked by replacing with new ones, or obviously working.
- 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.
As a rule, in such cases there is no display backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Usually, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. 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, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-01955A 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 complex repairs of MB (SSB) and with the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: SEMS29, SPI Flash: W25Q40BL, EEPROM: 24C256C, SOUND: NTP7412S; and other possible malfunctioning components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the tuner BN40-00256A, if it is not possible to tune to television channels, 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
Owners and users of the SAMSUNG UE46F5020 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 BN41-01955A is shown in the figure below:BN41-01955A
BN41-01955A can be used in TVs:
SAMSUNG UE32F5000AK (Panel CY-HF320BGSV1V), SAMSUNG UE32F5020AK (Panel T320HVF03.0), SAMSUNG UE42F5000AK UE42F5000 (Panel HF420BGA-B1), SAMSUNG UE46F5000AK UE46F5000 (Panel CY-HF460BGLV1V), SAMSUNG UE32F4800AW UE32F4800 (Panel CY-HF320AGLV2V).
The appearance of the power supply
Main features of the SAMSUNG UE46F5020 device:
Installed matrix (LED panel) CY-HF460BGLV1V.
The matrix control uses the Timing Controller (T-CON) BN41-01938A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SAMSUNG UE46F5020 TV are generated by the BN44-00610B power module or its analogs using the FA5695N, SQD2011K (Stb), FSFR1700XC microcircuits and KF12N60 type power switches.
MainBoard - the main board (motherboard) is a BN41-01955A module using CPU chips: SEMS29, SPI Flash: W25Q40BL, EEPROM: 24C256C, SOUND: NTP7412S; and others.
The tuner BN40-00256A provides the reception of television programs and tuning to channels.