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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Sunday 12 January 2020

REPAIR / SERVICING TV SAMSUNG UE40MU6100U

Technical description and composition of the SAMSUNG UE40MU6100U TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40MU6100U
Panel: CY-GK040HGLV4V
LED backlight: LM41-00120S BN96-34791A, LM41-00120R BN96-34792A
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00806A
MOSFET Power: K8A50D
MainBoard: BN41-02568A BN94-12034E
Control: IR: BN96-39955A, WIFI & BT: BN59-01264A
Technical Specifications UE40MU6100U
SAMSUNG UE40MU6100U
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SAMSUNG UE40MU6100U TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or the remote control.
With such manifestations, a malfunction is most likely to be detected in the BN44-00806A power supply module. It is necessary to measure its output voltages and, if they are absent, check the power switches (K8A50D) and rectifier diodes for the short circuit probability in the converters.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the main fuse 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 circuits are usually checked by replacement with new ones, or known to be working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In some of these cases, a malfunction is caused by a lack of 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.
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.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-02568A 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).
Attention! Users and owners of UE40MU6100U TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.

The appearance of the power supply
Main features of the SAMSUNG UE40MU6100U device:
Installed matrix (LED panel) CY-GK040HGLV4V.
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 UE40MU6100U TV is carried out by the BN44-00806A power supply module, or its analogs using power switches of the K8A50D type.
MainBoard - the main board (motherboard) is a BN41-02568A module.

Posted By: FRANK at 07:59
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