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 UE40JU6000

Technical description and composition of the SAMSUNG UE40JU6000 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40JU6000 UE40JU6000U
Chassis / Version: Ver: TH01
Panel: CY-GJ040HGLV5V
LED backlight: BN96-34707A, BN41-02375A, S_5U75_40_FL_R05_REV1.4_150514_LM41-00120R / S
T-CON: BN95-02131A
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN96-35335A P-LED L40S5_FHSV
MainBoard: BN41-02443A - BN94-10704M
IC MainBoard: K4B4G1646D-BCMA, NTP7415
Tuner: BN40-00318B
Control: BN59-01199G; WiFi: WIDT30Q BN59-01174E
Technical Specifications UE40JU6000U
SAMSUNG UE40JU6000
General repair guidelines for TV LCD LED
Malfunctions of the BN96-35335A power supply module can be expressed in different ways, for example, SAMSUNG UE40JU6000 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip may also cause a breakdown of the power switch of the converter.
If the image appears and immediately disappears when the TV is turned on, or it is initially absent when it is turned on, but the sound has other functions, there is a high probability of a malfunction of the display backlight LEDs or the LED driver (power converter of the panel illumination unit CY-GJ040HGLV5V).
A malfunction in the backlight circuits often occurs due to a break in the power supply lines of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the soldering of their outputs, as well as the reliability of the connections in the connectors and the soldering of the conclusions of the connectors.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. 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.
Repair or diagnostics of the motherboard BN41-02443A - BN94-10704M should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update the software (software).
Before replacing the tuner BN40-00318B, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of repair of electronic equipment.


The appearance of the MainBoard BN41-02443A is shown in the figure below:
BN41-02443A
The appearance of the power supply
Main features of the SAMSUNG UE40JU6000 device:
Installed matrix (LED panel) CY-GJ040HGLV5V.
The matrix control uses the Timing Controller (T-CON) BN95-02131A.
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 UE40JU6000 TV is carried out by the BN96-35335A power supply module, or its analogs.
MainBoard - the main board (motherboard) is a BN41-02443A module, using K4B4G1646D-BCMA, NTP7415 and others.
The tuner BN40-00318B provides the reception of television programs and tuning to channels !


Posted By: FRANK at 07:00
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