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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Wednesday, 16 September 2020

REPAIRING / SERVICING TV SAMSUNG UE43N5000AU

Technical description and composition of the SAMSUNG UE43N5000AU TV, panel type and modules used. The composition of the modules.
SAMSUNG LED
Model: UE43N5000AU
Chassis / Version: AA01 / UN5000
Panel: CY-JN043BGAV1V
LED backlight: LM41-00622A, LM41-00624A
T-CON: 43T01-C04 T430HVN01.6 Ctrl BD
LED driver (backlight): integrated into PSU 730 mA
Power Supply (PSU): BN44-00852F L48MSFR_MDY
MainBoard: BN41-02582B BN94-13192
IC MainBoard: SENK20-MS
Tuner: BN40-00331B
Control: CPU: SENK20-MS, NAND ESTM NT17L 2M
UE43N5000AU Specifications
SAMSUNG UE43N5000AU
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- SAMSUNG UE43N5000AU TV does not turn on at all. Control lamps do not light up or blink. The TV on the remote control and control panel buttons does not respond.
In such cases, the fault should be looked for primarily in the power module BN44-00852F. Its output voltages should be measured and, in their absence, the power switches and rectifier diodes should be checked for the probability of a short circuit in the converters.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short-circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key most often breaks off.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM), if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacement.
- There is no image, the screen is black, there is sound, sometimes you can see barely noticeable outlines of the image in ambient light.
Usually, in such cases, a malfunction is detected in the LED panel backlight nodes. Often the reason is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the strips (strings), less often the LED driver turns out to be faulty.
It is impossible to identify an open circuit in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and a voltage of several tens of volts is required to open their junctions. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Usually, Chinese multimeters lightly light one 3-volt LED if you connect the probes to it in the forward direction (red probe to the anode, black to the cathode). For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or pierced in the K / Z.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the BN41-02582B motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Complicated MB (SSB) repair is possible only in the conditions of a service center with the necessary equipment. Checking or replacing SENK20-MS elements requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the warm-up method.

Before replacing the BN40-00331B tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. You also need to make sure that the tuner and processor can exchange data via the I2C bus
Attention to users! Self-repair of the SAMSUNG UE43N5000AU TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Additional MainBoard Repair
The appearance of the MainBoard BN41-02582B is shown in the figure below:
BN41-02582B
External view of the power supply
Main features of the SAMSUNG UE43N5000AU device:
Installed matrix (LED panel) CY-JN043BGAV1V.
Matrix control uses Timing Controller (T-CON) 43T01-C04.
A converter combined with a power supply is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE43N5000AU TV is carried out by the BN44-00852F power module, or its analogs.
MainBoard - the main board (motherboard) is a BN41-02582B module, using SENK20-MS chips and others.
Tuner BN40-00331B provides reception of television programs and tuning to channels.


SAMSUNG UE43N5000AU TV with LCD CY-JN043BGAV1V, 42.5 "(108 cm) 16: 9 format diagonal. This model uses a panel with edge LED backlighting - Edge LED.
The CY-JN043BGAV1V matrix and the software of the MainBoard BN41-02582B provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics decomposition at 1080p (Full HD). Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
Speaker sound system power 20 W (2x10 W) is provided by two speakers. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x2, USB.
The digital tuner can receive TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The power consumed in the operating mode from the network is 105 W. Power supply BN44-00852F.
Dimensions: with stand 980x597x170 mm, without stand 980x572x77 mm.
TV weight: with stand: 8.2 kg, without stand: 8 kg.
Attention! Panel CY-JN043BGAV1V of SAMSUNG UE43N5000AU LED TV is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.
Posted By: FRANK at 04:49
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