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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Saturday, 11 January 2020

REPAIR / SERVICING TV SAMSUNG UE40J5200

Technical description and composition of the SAMSUNG UE40J5200 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40J5200 UE40J5200AU
Chassis / Version: DC03
Panel: CY-JJ040BGNV2V // CY-JJ040BGNV6V
LED backlight: V5DN-395SM0-R2 770mm 8LED
T-CON: V400HJ6-PE1; CM2801C, CM506, CM603
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00852A L48MSF_FDI
PWM Power: FA6A20N
MainBoard: BN41-02482A BN94-09586L
Tuner: BN40-00318A DNTS243H5A
Control: Wi-Fi: BN59-01196C
Technical Specifications UE40J5200AF
SAMSUNG UE40J5200
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE40J5200 TV does not turn on and does not show any signs of operability. There is no reaction to either the remote control or the control buttons from the front panel.
With such manifestations, a malfunction is most likely to be detected in the BN44-00852A power supply module. It is necessary to measure the secondary output voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM) FA6A20N. It is checked only by replacement with a known good one.
- 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.
The most likely in these cases is a malfunction of the LED 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 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 BN41-02482A motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software).
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-00318A DNTS243H5A 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 necessary qualifications! Trust the repair to professionals with sufficient experience in the repair of electronic equipment.


The appearance of the MainBoard BN41-02482A is shown in the figure below:
BN41-02482A
The appearance of the power supply
Main features of the SAMSUNG UE40J5200 device:
Installed matrix (LED-panel) CY-JJ040BGNV2V or CY-JJ040BGNV6V.
The matrix control uses the Timing Controller (T-CON) V400HJ6-PE1 ;.
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 UE40J5200 TV is carried out by the BN44-00852A power module, or its analogs using FA6A20N microcircuits.
MainBoard - the main board (motherboard) is a BN41-02482A module.
The tuner BN40-00318A DNTS243H5A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 08:19
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