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 UE43N5500AU

Technical description and composition of the SAMSUNG UE43N5500AU TV, panel type and modules used. The composition of the modules.
SAMSUNG LED
Model: UE43N5500AU
Panel: CY-NN043BGAV1V
LED backlight: BN61-15482A
T-CON: T-CON T430HVN01.6 Ctrl BD
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00956A L43E5_NDY REV 1.1
PWM Power: PFC, PWM
MOSFET Power: N-FET TO-220F
MainBoard: BN41-02575B BN41-02575 BN94-13052A
IC MainBoard: CPU: SDP1604, eMMC: THGBMDG5D1LBAIT, SPI Flash: 25Q40, EEPROM: 25C512
Tuner: BN40-00331B
Control: IR & Button: BN41-02515A, Wi-Fi: BN59-01174D WIDE30Q9
UE43N5500AU Specifications
SAMSUNG UE43N5500AU
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- TV SAMSUNG UE43N5500AU does not turn on and does not give any signs of turning on, does not respond to control buttons and to the remote control.
Often in such cases, the power module BN44-00956A is faulty. Its output voltages should be measured, and in their absence, check the serviceability of the power switches (N-FET TO-220F) of the converters and rectifier diodes for the probability of short circuit.
In case of any breakdowns of semiconductors in the secondary circuits, the converter can usually operate normally in an 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 in the source of the key.
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) PFC, PWM, if they have no visible damage to the case and an open short circuit between the pins, are usually checked by replacing.
- There is no image, the screen is black, there is sound, sometimes you can see barely noticeable outlines of the image in the ambient light of the screen.
In such cases, the most likely malfunction of the LED panel backlighting elements. The reason may be in the breakage of the LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the strings connectors,
It should be remembered that it is not possible to determine an open circuit in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then you need to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow opening the LED in the forward direction or dual LEds are used, then the PN transition of the emergency zener diode can indirectly serve as an indicator of serviceability. In the event of a malfunction of the LED-a, the PN-transition of the zener diode will either be cut off or broken into the K / Z.
- The TV does not turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the BN41-02575B 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). Often the MB (SSB) board needs to be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU: SDP1604, eMMC: THGBMDG5D1LBAIT, SPI Flash: 25Q40, EEPROM: 25C512 and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
The malfunction of the BN40-00331B tuner is established after checking the software and all supply voltages at its terminals. The tuner data exchange with the processor via the I2C bus can be monitored with an oscilloscope.
Attention to users! Self-repair of the SAMSUNG UE43N5500AU TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!

Additional MainBoard Repair
The appearance of the MainBoard BN41-02575B is shown in the figure below:
BN41-02575B
External view of the power supply
The main features of the SAMSUNG UE43N5500AU device:
The matrix (LED-panel) CY-NN043BGAV1V is installed.
Matrix control uses the T-CON Timing Controller (T-CON).
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 UE43N5500AU TV is carried out by the BN44-00956A power module, or its analogues using PFC, PWM microcircuits and N-FET TO-220F power switches.
MainBoard - the main board (motherboard) is a BN41-02575B module, using CPU chips: SDP1604, eMMC: THGBMDG5D1LBAIT, SPI Flash: 25Q40, EEPROM: 25C512 and others.
The BN40-00331B tuner provides reception of television programs and tuning to channels.



SAMSUNG UE43N5500AU LCD TV, 42.5 "(108 cm) 16: 9 format diagonal size. This model uses a panel with edge LED backlighting - Edge LED.
The design and technical capabilities of the TV provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution at the standard 1080p (Full HD). Image processing is performed using modern High Dynamic Range (HDR) technology with an extended range of brightness gradations.
The UE43N5500AU TV is equipped with SMART software, built-in applications and the ability to work on the Internet. The connection to the network can be carried out via Wi-Fi wireless connection. 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 x3, USB x2, Ethernet (RJ-45), Wi-Fi, Miracast.
The digital tuner can receive TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The power consumed when operating from the mains is 100 W.
Dimensions: with stand 972x646x297 mm, without stand 972x569x61 mm.
TV weight: with stand: 11.1 kg, without stand: 9.2 kg.
Attention! The panel of the SAMSUNG UE43N5500AU 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 05:04
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