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 UE40J5550

Technical description and composition of the SAMSUNG UE40J5550 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40J5550 UE40J5550AU
Chassis / Version: Ver: HS01
Panel: CY-GJ040BGSV1V
LED backlight: BN96-30417A, BN41-02172A; 2014SVS40 3228 L06 REV1.3
T-CON: RUNTK 5538TP ZA
LED driver (backlight): integrated in PSU
PWM LED driver: 7014X
MOSFET LED driver: 5N40, KF3N40W
Trans LED driver: 6504i
Power Supply (PSU): BN44-00703G
PWM Power: S3051 (PFC), FA6A20 (PWM resonant)
MOSFET Power: 13N60M2 (PFC), 14NM50N
MainBoard: BN41-02353B - BN94-09121K
IC MainBoard: SPI Flash: W25Q40; EEPROM: 24C512
Tuner: BN90-00319A
Control: Wi-Fi BN59-01174D WIDT30Q
Technical Specifications UE40J5550
SAMSUNG UE40J5550
General repair guidelines for TV LCD LED
In the case when the UE40J5550 does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, the BN44-00703G power supply module is probably faulty in this case. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors 13N60M2 (PFC), 14NM50N, which are often found in such a breakdown state.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM regulator chip S3051 (PFC), FA6A20 (PWM resonant), which it is desirable to check by replacement, are subject to verification.
If the SAMSUNG UE40J5550 does not have an image, but there is sound, there may be a malfunction of the backlight LEDs of the CY-GJ040BGSV1V panel or their power converter - LED driver.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as the contact connections in the connectors and soldering.
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 motherboard BN41-02353B - BN94-09121K must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - SPI Flash: W25Q40; EEPROM: 24C512. Defective components should be replaced.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN90-00319A 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.
Owners and users of the SAMSUNG UE40J5550 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!


The appearance of the MainBoard BN41-02353B is shown in the figure below:
BN41-02353B
BN41-02353B can be used in TVs:
SAMSUNG UE40J6390 (Panel CY-GH040CSLV1V), SAMSUNG UE40J5530AU UE40J5530 (Panel CY-GJ040BGSV5V), SAMSUNG UE40J5500AU (Panel CY-GJ040BGSV5V), SAMSUNG UE40J5550 UE40J5550AU (Panel CY-GJ040BGSV1V), SAMSUNG UE40J6330AU (Panel CY-GH040CSLVFV), SAMSUNG UE32J6300 UE32J6300AU (Panel CY-GH032CSLV5V), SAMSUNG UE48J6200AU (Panel CY-GH048CSLVAV), SAMSUNG UE48J5510AU (Panel CY-GJ048BGLV3V), SAMSUNG UE32J6500AU UE32J6500 (Panel CY-WJ032CGLV2V), SAMSUNG UE40J5520AU UE40J5520 (Panel CY-GJ040BGSV5V), SAMSUNG UE43J5500 UE43J5500AU (Panel T430HVF01.0), SAMSUNG UE40J6200AU UE40J6200 (Panel CY-GH040CSLV8V), SAMSUNG UE32J5550AU UE32J5550 (Panel CY-GJ032BGAB3V), SAMSUNG UE32J5500AU (Panel T320HVF05.5), SAMSUNG UE40J6590 UE40J6590AU (Panel CY-WJ040CGLV1V), SAMSUNG UE40J5510AU (Panel CY-GJ040BGSV3V).
PSU Advanced
The UE40J5550 model uses a BN44-00703G power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the S3051 PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor from the network directly through the open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased DC voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the SAMSUNG UE40J5550 device:
Installed matrix (LED-panel) CY-GJ040BGSV1V.
The matrix control uses the Timing Controller (T-CON) RUNTK.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a 7014X PWM controller. A 6504i transformer is installed in the LED driver converter. As power elements of the LED driver, keys of the type 5N40, KF3N40W are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40J5550 TV are generated by the BN44-00703G power supply module or its analogs using S3051 (PFC), FA6A20 (PWM resonant) microcircuits and 13N60M2 (PFC), 14NM50N power switches.
MainBoard - the main board (motherboard) is a BN41-02353B module, using SPI Flash chips: W25Q40; EEPROM: 24C512 and others.
The tuner BN90-00319A provides the reception of television programs and tuning to channels.


Posted By: FRANK at 06:36
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