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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Tuesday, 21 January 2020

REPAIR / SERVICING TV SAMSUNG UE50J6240

Technical description and composition of the SAMSUNG UE50J6240 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE50J6240 UE50J6240AU
Chassis / Version: Ver: DA01
Panel: CY-GH050CSNV4V
LED backlight: D4GE-500DCA-R2 (14.03.17)
T-CON: 2015_INX_FHD_HAWK_FTS_V04
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00704E
PWM Power: FA6A01
MainBoard: BN41-02353C BN94-10814C
IC MainBoard: W25Q40, 24c512
Control: BN59-01198Q, WIFI: WIDT30Q BN59-01174D
Technical Specifications UE50J6240AU
SAMSUNG UE50J6240
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE50J6240 TV does not turn on at all. The control lights do not light or flash. On the remote control and the buttons on the control panel does not respond.
In such cases, the BN44-00704E power supply is usually faulty. It is necessary to measure the secondary output supply voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the possibility of breakdown in PN semiconductor junctions.
During thermal and avalanche breakdowns of semiconductors in 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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip FA6A01 can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason can be both in the power 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 check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. 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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-02353C 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements W25Q40, 24c512. BGA chip malfunctions are usually easy to detect by warming up.
Attention to users! Self-repair of a SAMSUNG UE50J6240 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!



The appearance of the MainBoard BN41-02353C is shown in the figure below:
BN41-02353C
BN41-02353C can be used in TVs:
SAMSUNG UE50J6240 UE50J6240AU (Panel CY-GH050CSNV4V), SAMSUNG UE40J6230AU (Panel CY-GH040BGLVBV), SAMSUNG UE40J6240AU (Panel CY-GH040BGLVBV).
The appearance of the power supply
Main features of the SAMSUNG UE50J6240 device:
Installed matrix (LED panel) CY-GH050CSNV4V.
The matrix control uses the Timing Controller (T-CON) 2015_INX_FHD_HAWK_FTS_V04.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE50J6240 TV is carried out by the BN44-00704E power module, or its analogs using FA6A01 microcircuits.
MainBoard - the main board (motherboard) is a BN41-02353C module, using W25Q40, 24c512 chips and others.
Posted By: FRANK at 08:11
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