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 UE40K5500

Technical description and composition of the SAMSUNG UE40K5500 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40K5500
Chassis / Version: Ver: FA01
Panel: CY-KK040BGLV1V
LED backlight: S_K5.5-6.2K_40_SFL70 52LED REV2.0 160129 LM41-00298A
T-CON: LSF400HN03-G - BN41-02292A
LED driver (backlight): integrated into PSU
PWM LED driver: SLC7015R02
Power Supply (PSU): BN44-00871A - L40E_KDY
PWM Power: FA1A50N, FA6A21N
MOSFET Power: 60R580P
MainBoard: BN41-02534B BN94-10759W
IC MainBoard: Sound: TAS5747
Tuner: BN40-00316A
Control: IR: BN41-02515A, WiFi: WCK720Q
Technical Specifications UE40K5500AU
SAMSUNG UE40K5500
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE40K5500 TV does not turn on and does not show any signs of turning on. There is no reaction to the control buttons and the remote control.
With such manifestations, a malfunction is most likely to be detected in the BN44-00871A power supply module. It is necessary to verify the presence of secondary supply voltages and, if they are absent, check the power switches 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 power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In most cases, a malfunction is caused by a lack of display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Usually, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-02534B 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Testing or replacing Sound elements: TAS5747 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 warming up.
If there is no reception of television channels, but the TV works properly from external devices, first of all, check the voltage of the tuner BN40-00316A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
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 BN41-02534B is shown in the figure below: The appearance of the MainBoard BN41-02534B is shown in the figure below:
BN41-02534B
BN41-02534B can be used in TVs:
SAMSUNG UE40K5500 (Panel CY-KK040BGLV1V), SAMSUNG UE32K5500 UE32K5500AW (Panel CY-KK032BGAV1V), SAMSUNG UE49K5500 UE49K5500BU (Panel CY-KK049BGLV1V).
The appearance of the power supply
Main features of the SAMSUNG UE40K5500 device:
Installed matrix (LED-panel) CY-KK040BGLV1V.
The matrix control uses the Timing Controller (T-CON) LSF400HN03-G.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SLC7015R02 PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE40K5500 TV are generated by the BN44-00871A power module or its analogs using FA1A50N, FA6A21N microcircuits and 60R580P type power switches.
MainBoard - the main board (motherboard) is a BN41-02534B module, using Sound: TAS5747 and others.
The tuner BN40-00316A provides the reception of television programs and tuning to channels.
BN41-02534B
BN41-02534B can be used in TVs:
SAMSUNG UE40K5500 (Panel CY-KK040BGLV1V), SAMSUNG UE32K5500 UE32K5500AW (Panel CY-KK032BGAV1V), SAMSUNG UE49K5500 UE49K5500BU (Panel CY-KK049BGLV1V).
The appearance of the power supply
Main features of the SAMSUNG UE40K5500 device:
Installed matrix (LED-panel) CY-KK040BGLV1V.
The matrix control uses the Timing Controller (T-CON) LSF400HN03-G.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SLC7015R02 PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE40K5500 TV are generated by the BN44-00871A power module or its analogs using FA1A50N, FA6A21N microcircuits and 60R580P type power switches.
MainBoard - the main board (motherboard) is a BN41-02534B module, using Sound: TAS5747 and others.
The tuner BN40-00316A provides the reception of television programs and tuning to channels.


Posted By: FRANK at 07:29
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