REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Friday, 10 January 2020

REPAIR / SERVICING TV SAMSUNG UE40F6400

Technical description and composition of the SAMSUNG UE40F6400 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40F6400 UE40F6400AK
Chassis / Version: U85A // Ver: VH05
Panel: CY-HF400CSLV2V // CY-HF400CSLV1V
LED backlight: D2GE-400SCA-R3, D2GE-400SCB-R3
T-CON: CTRL BD BN41-01939B LSF400HF02 // BN41-01939A LSF400HJ01
LED driver (backlight): integrated into PSU
PWM LED driver: SLC2013M
MOSFET LED driver: KF9N25
Power Supply (PSU): BN44-00622B
PWM Power: FSFR1800HS, SPC7011F (PFC = FA5695N), SQD3011K (STR3A161HD)
MOSFET Power: STF13NM60 (PFC)
MainBoard: BN41-01958A BN94-06555H
IC MainBoard: CPU: SEMS30, SPI FLASH: W25Q40, SDRAM: K4B2G1646E
Tuner: BN40-00262B GT2CX-3S / K3S
Control: Remote: AA59-00743A, IR: BN96-26401N (BN41-01976B), WIFI: WIDT30Q BN59-01161A
Technical Specifications UE40F6400
SAMSUNG UE40F6400
General repair guidelines for TV LCD LED
Malfunctions of the BN44-00622B power module can be expressed in different ways, for example, SAMSUNG UE40F6400 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
In cases where the SAMSUNG UE40F6400 TV has lost its image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the CY-HF400CSLV2V panel). When you turn on the TV, the image may appear briefly and disappear. It must be borne in mind that with such manifestations the LEDs themselves also fail.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
When trying to identify a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
In cases of attempts to repair the motherboard BN41-01958A BN94-06555H, it is necessary to check the operability of the linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed by local heating.
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: SEMS30, SPI FLASH: W25Q40, SDRAM: K4B2G1646E. 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 BN40-00262B GT2CX-3S / K3S 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.
We recommend the owners of the UE40F6400 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!


SCHEMATIC MANUAL -------------->  SAMSUNG UE32F6400, UE40F6400, UE46F6400, UE50F6400, UE55F6400, UE65F6400, UE75F6400 CHASSIS U85A.

PSU SCHEMATIC ----------------> BN44-00622B Power Supply schematic diagram.

CY-HF400CSLV1V LEDS Backlight: BN41-01970A, D2GE-400SCB-R3[12,12,28], D2GE-400SCA-R3[12,12,28].


 The appearance of the MainBoard BN41-01958A is shown in the figure below:
BN41-01958A
BN41-01958A can be used in TVs:
SAMSUNG UE39F5500 UE39F5500AK (Panel HF390BGM-C1), SAMSUNG UE32F5300AK (Panel HF320BGA-B1), SAMSUNG UE32F6200 UE32F6200AK (Panel CY-HF320BGLV2V), SAMSUNG UE42F5500AK (Panel HF420BGA-B1), SAMSUNG UE32F4500AK (Panel HF32AGH-R1), SAMSUNG UE32F5500AK UE32F5500AW (Panel HF320BGA-B1), SAMSUNG UE40F6400 UE40F6400AK (Panel CY-HF400CSLV2V), SAMSUNG UE42F5300AK (Panel CY-HF420BGAV1V), SAMSUNG UE32F6400AK UE32F6400 (Panel HF320CSA-B1), SAMSUNG UE39F5300AK UE39F5300 (Panel HF390BGM-C1), SAMSUNG UE46F6200AK (Panel CY-HF460BGLV2V), SAMSUNG UE46F6400AK (Panel СY-HF460CSLV2V), SAMSUNG UE46F6540AB (Panel CY-GF460CSLV3V), SAMSUNG UE40F6540AB (Panel CY-GF400CSLV3V), SAMSUNG UE40F6650 UE40F6650AB (Panel CY-GF400CSLV1V), SAMSUNG UE32F6540 (Panel CY-HF320CSLV3V), SAMSUNG UE46F5300 UE46F5300AK (Panel CY-HF460BGLV1V), SAMSUNG UE32F6800 UE32F6800AB (Panel CY-HF320CSLV1V).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the BN44-00622B module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the PWM controller SPC7011F = FA5695N. 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 UE40F6400 device:
Installed matrix (LED-panel) CY-HF400CSLV2V or CY-HF400CSLV1V.
The matrix control uses the Timing Controller (T-CON) CTRL.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SLC2013M PWM controller. As the power elements of the LED driver, keys of the KF9N25 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40F6400 TV are generated by the BN44-00622B power module or its analogs using the FSFR1800HS, SPC7011F (PFC = FA5695N), SQD3011K (STR3A161HD) microcircuits, and STF13NM60 (PFC) type power switches.
MainBoard - the main board (motherboard) is a BN41-01958A module, using CPU chips: SEMS30, SPI FLASH: W25Q40, SDRAM: K4B2G1646E and others.
The tuner BN40-00262B GT2CX-3S / K3S provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:16
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