Technical description and composition of the SAMSUNG UE40C5000QW TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40C5000QW UE40C5000
Chassis / Version: Ver: FB02
Panel: T400FAE2-HE
LED backlight: LMB-4000BM11
T-CON: CPWBX RUNTK DUNTK 4414TP ZZ
LED driver (backlight): integrated into PSU; 290 mA
PWM LED driver: HV9963, KIA358F
MOSFET LED driver: FDPF5N50
Power Supply (PSU): BN44-00353A - PD46AF0E_ZSM - PSLF121B01A-B
PWM Power: UCC25600, SEM3040 (PFC), ICE3BR1765J (Standby)
MOSFET Power: TK8A50, SD10N60 (PFC)
MainBoard: BN41-01378A BNP201064FD
IC MainBoard: MX25L4005A STA369BWS AT24C256C
Tuner: BN40-00172A DTOS40CVH081A
Control: IR: BN96-13047D BN41-01390A
Technical Specifications UE40C5000
SAMSUNG UE40C5000QW
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE40C5000QW 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.
Failure in such cases should begin to be sought in the BN44-00353A power supply circuits. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is first necessary to check the power switches (TK8A50, SD10N60 (PFC)) 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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, elements supplying a PWM controller, frequency-setting, damper, and also elements of the Negative Stabilization Feedback. PWM circuits UCC25600, SEM3040 (PFC), ICE3BR1765J (Standby) are usually checked by replacing with new ones, or obviously working.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
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.
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 BN41-01378A 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MX25L4005A STA369BWS AT24C256C. BGA chip malfunctions are usually easy to detect by warming up.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-00172A DTOS40CVH081A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the repair of electronic equipment.
PSU SCHEMATIC ----------------> BN44-00353A Power Supply schematic diagram
The appearance of the MainBoard BN41-01378A is shown in the figure below:BN41-01378A
BN41-01378A can be used in TVs:
SAMSUNG UE32C4000PW (Panel LTF320AP10), SAMSUNG UE37C5100 QW (Panel T370FAE1-DA), SAMSUNG UE40C5000QW UE40C5000 (Panel T400FAE2-HE).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the BN44-00353A module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the SEM3040 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the mains capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG UE40C5000QW device:
Installed matrix (LED-panel) T400FAE2-HE.
The matrix control uses the Timing Controller (T-CON) CPWBX.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by a HV9963, KIA358F PWM controller. As power elements of the LED driver, keys of the FDPF5N50 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40C5000QW TV are generated by the BN44-00353A power supply module or its analogs using UCC25600, SEM3040 (PFC), ICE3BR1765J (Standby) microcircuits, and TK8A50, SD10N60 (PFC) type power switches.
MainBoard - the main board (motherboard) is a BN41-01378A module, using the MX25L4005A STA369BWS AT24C256C chips and others.
Tuner BN40-00172A DTOS40CVH081A provides the reception of television programs and tuning to channels.